Internal Medicine News

New biologic drugs for chronic obstructive pulmonary disease (COPD) are finally here, said Stephen Rennard, MD, in a presentation in a session on new drugs at the 2024 GOLD International COPD Conference.

The inflammatory pathways associated with COPD are diverse and offer a range of potential targets for biologics, said Rennard, a professor of pulmonary, critical care, and sleep medicine at the University of Nebraska Medical Center, Omaha. 

The therapeutic goals of biologics remain the same as with other treatments for COPD, namely restoration of normal inflammatory response and alteration of disease progression, as well as restoration of lost structure and function and improvement of systemic effects, Rennard said in his presentation. Most studies of new and up-and-coming drugs have improvement in acute exacerbation of COPD as the primary outcome.

 

The Biology Behind the Biologics

T2 inflammation is “an inflammatory cascade led by IL [interleukin]-4, IL-13, and IL-5,” Mona Bafadhel, MD, chair of Respiratory Medicine at King’s College London in England, said in her presentation during the session.

Bafadhel, who served as one of the investigators on the BOREAS and NOTUS studies, explained some of the science behind the development of the new biologics.

Eosinophils are powerful regulators of immune response and inflammation by stimulating T-cell production and affecting other immune cell types, she noted.

In the context of COPD and drug development, high blood eosinophil counts have been associated with increased COPD-related exacerbations, Bafadhel said. She cited data from a Dutch study of more than 7000 patients with COPD (with and without clinical diagnoses), in which absolute eosinophil counts ≥ 3.3% were associated with increased risk for severe exacerbations of 32% and 84% across all patients with COPD and clinical COPD, respectively.

Understanding the mechanisms of the eosinophil in COPD is important for research and development, Bafadhel said. Along with standardizing measurement of T2 inflammatory markers (IL-4, IL-13, and IL-5), more research is needed to fully understand the role of eosinophils in immunoregulation and repair.

 

Fitting the Biologic to the Patient

Several recent studies of up-and-coming biologics have focused on subsets of COPD patients, said Dave Singh, MD, professor of clinical pharmacology and respiratory medicine at The University of Manchester in England, in his presentation at the meeting. In September 2024, the Food and Drug Administration approved dupilumab as the first biologic treatment for patients with uncontrolled COPD and type 2 inflammation on the basis of eosinophil counts. Singh cited data from the BOREAS and NOTUS studies in which dupilumab significantly reduced exacerbations and improved lung function in these patients, compared with a placebo.

Mepolizumab, a biologic approved for asthma, is not currently approved for COPD, but data from a 2017 study showed a trend toward reduced exacerbations, compared with placebo, in a subset of patients with high blood eosinophil counts, Singh said.

In addition, a recent unpublished phase 3 study (MATINEE) showed a reduction in the annualized rate of exacerbations, compared with placebo, on the basis of up to 2 years’ follow-up.

Singh also highlighted data from a phase 2a study of astegolimab, a biologic drug that focuses on the IL-33 receptor, in which COPD exacerbation rates were not significantly different between treatment and placebo groups. However, astegolimab has shown safety and efficacy in adults with severe asthma and is under development in phase 3 trials for COPD.

Tezepelumab, which was approved by the FDA in 2021 as an add-on therapy for severe asthma in patients aged 12 years or older, is also in development as a therapy for COPD exacerbations, Singh said.

In a study presented at the 2024 American Thoracic Society annual meeting, Singh and colleagues found that tezepelumab at a subcutaneous dose of 420 mg every 4 weeks reduced the annualized rate of moderate or severe COPD exacerbations compared with placebo based on data from approximately 300 patients, although the difference was not statistically significant.

Itepekimab, another biologic, showed promise in a phase 2a genetic association study involving current and former smokers with moderate to severe COPD, Singh said.

In that study, published in 2022 in The Lancet Respiratory Medicine, itepekimab failed to meet the primary endpoint in the overall study population of reduced annualized rate of moderate to severe exacerbations; however, a subgroup analysis of former smokers showed a significant (42%) reduction in exacerbations, Singh said in his presentation. Two phase 3 clinical studies (AERIFY-1/2) are ongoing to confirm the safety and efficacy of itepekimab in former smokers with COPD.

 

Takeaways and Next Steps

“These therapies provide the first new classes of medications approved for COPD in nearly 20 years,” said David M. Mannino, MD, of the University of Kentucky, Lexington, in an interview. “Dupilumab will be available to a subset of patients who are poorly controlled and have evidence of high eosinophils in their blood and is only used once every 2 weeks,” added Mannino, who has served as a consultant to companies developing COPD drugs.

Both dupilumab and ensifentrine, a phosphodiesterase (PDE) 3 and PDE4 inhibitor also recently approved for maintenance treatment of COPD, have been shown in clinical trials to reduce exacerbations and improve symptoms, said Mannino. Both offer additional options for patients who continue to have symptoms and exacerbations in spite of their current therapy.

Some barriers to the use of biologics in practice include the high cost. “Access and overcoming insurance-related issues such as preauthorization and high copays will be a challenge,” he said. Also, because dupilumab is an injectable drug, some patient training will be required.

Newer biologic therapies in development are also injectables, but some studies are examining longer time intervals as long as every 6 months, which could be a major advancement for some patients. The newer therapies in development are similar to dupilumab in that they will be injected therapies. Some in development are looking at longer time intervals as long as every 6 months, which may be a major advancement for some patients. “All of these therapies, however, are currently targeting more advanced or serious disease,” he said.

Looking ahead, more therapies are needed for the treatment of early COPD, as well as therapies that can be administered to a large number of patients at a reasonable cost, Mannino added.

Rennard disclosed serving as a consultant for Verona Pharma, Sanofi, Beyond Air, RS BioTherapeutics, RespirAI, and Roche, as well as speaker fees from Sanofi and temporary ownership interest while employed by AstraZeneca. Rennard is also the founder of Great Plains Biometrix. Bafadhel disclosed funding from the National Institute for Health Research (NIHR), grants from Asthma + Lung UK, Horizon Europe, NIHR, and AstraZeneca to her institution, and honoraria from AstraZeneca, Boehringer Ingelheim, Chiesi, GlaxoSmithKline, Novartis, and Pfizer. Singh disclosed relationships including speaking sponsorships, honoraria, and advisory board memberships for Adovate, Aerogen, Almirall, Apogee, Arrowhead, AstraZeneca, Bial, Boehringer Ingelheim, Chiesi, Cipla, Connect Biopharm, Covis, CSL Behring, DevPro Biopharm, Elpen, Empirico, EpiEndo, Genentech, Generate Biomedicines, GlaxoSmithKline, Glenmark, Kamada, Kinaset Therapeutics, Kymera, Menarini, MicroA, OM Pharma, Orion, Pieris Pharmaceuticals, Pulmatrix, Revolo, Roivant Sciences, Sanofi, Synairgen, Tetherex, Teva, Theravance Biopharma, Upstream, and Verona Pharma. Mannino disclosed serving as a consultant to multiple companies currently developing COPD therapies (AstraZeneca, GlaxoSmithKline, Roche, Regeneron, Sanofi, Genentech, Amgen, and Chiesi).

A version of this article appeared on Medscape.com.

New biologic drugs for chronic obstructive pulmonary disease (COPD) are finally here, said Stephen Rennard, MD, in a presentation in a session on new drugs at the 2024 GOLD International COPD Conference.

The inflammatory pathways associated with COPD are diverse and offer a range of potential targets for biologics, said Rennard, a professor of pulmonary, critical care, and sleep medicine at the University of Nebraska Medical Center, Omaha. 

The therapeutic goals of biologics remain the same as with other treatments for COPD, namely restoration of normal inflammatory response and alteration of disease progression, as well as restoration of lost structure and function and improvement of systemic effects, Rennard said in his presentation. Most studies of new and up-and-coming drugs have improvement in acute exacerbation of COPD as the primary outcome.

 

The Biology Behind the Biologics

T2 inflammation is “an inflammatory cascade led by IL [interleukin]-4, IL-13, and IL-5,” Mona Bafadhel, MD, chair of Respiratory Medicine at King’s College London in England, said in her presentation during the session.

Bafadhel, who served as one of the investigators on the BOREAS and NOTUS studies, explained some of the science behind the development of the new biologics.

Eosinophils are powerful regulators of immune response and inflammation by stimulating T-cell production and affecting other immune cell types, she noted.

In the context of COPD and drug development, high blood eosinophil counts have been associated with increased COPD-related exacerbations, Bafadhel said. She cited data from a Dutch study of more than 7000 patients with COPD (with and without clinical diagnoses), in which absolute eosinophil counts ≥ 3.3% were associated with increased risk for severe exacerbations of 32% and 84% across all patients with COPD and clinical COPD, respectively.

Understanding the mechanisms of the eosinophil in COPD is important for research and development, Bafadhel said. Along with standardizing measurement of T2 inflammatory markers (IL-4, IL-13, and IL-5), more research is needed to fully understand the role of eosinophils in immunoregulation and repair.

 

Fitting the Biologic to the Patient

Several recent studies of up-and-coming biologics have focused on subsets of COPD patients, said Dave Singh, MD, professor of clinical pharmacology and respiratory medicine at The University of Manchester in England, in his presentation at the meeting. In September 2024, the Food and Drug Administration approved dupilumab as the first biologic treatment for patients with uncontrolled COPD and type 2 inflammation on the basis of eosinophil counts. Singh cited data from the BOREAS and NOTUS studies in which dupilumab significantly reduced exacerbations and improved lung function in these patients, compared with a placebo.

Mepolizumab, a biologic approved for asthma, is not currently approved for COPD, but data from a 2017 study showed a trend toward reduced exacerbations, compared with placebo, in a subset of patients with high blood eosinophil counts, Singh said.

In addition, a recent unpublished phase 3 study (MATINEE) showed a reduction in the annualized rate of exacerbations, compared with placebo, on the basis of up to 2 years’ follow-up.

Singh also highlighted data from a phase 2a study of astegolimab, a biologic drug that focuses on the IL-33 receptor, in which COPD exacerbation rates were not significantly different between treatment and placebo groups. However, astegolimab has shown safety and efficacy in adults with severe asthma and is under development in phase 3 trials for COPD.

Tezepelumab, which was approved by the FDA in 2021 as an add-on therapy for severe asthma in patients aged 12 years or older, is also in development as a therapy for COPD exacerbations, Singh said.

In a study presented at the 2024 American Thoracic Society annual meeting, Singh and colleagues found that tezepelumab at a subcutaneous dose of 420 mg every 4 weeks reduced the annualized rate of moderate or severe COPD exacerbations compared with placebo based on data from approximately 300 patients, although the difference was not statistically significant.

Itepekimab, another biologic, showed promise in a phase 2a genetic association study involving current and former smokers with moderate to severe COPD, Singh said.

In that study, published in 2022 in The Lancet Respiratory Medicine, itepekimab failed to meet the primary endpoint in the overall study population of reduced annualized rate of moderate to severe exacerbations; however, a subgroup analysis of former smokers showed a significant (42%) reduction in exacerbations, Singh said in his presentation. Two phase 3 clinical studies (AERIFY-1/2) are ongoing to confirm the safety and efficacy of itepekimab in former smokers with COPD.

 

Takeaways and Next Steps

“These therapies provide the first new classes of medications approved for COPD in nearly 20 years,” said David M. Mannino, MD, of the University of Kentucky, Lexington, in an interview. “Dupilumab will be available to a subset of patients who are poorly controlled and have evidence of high eosinophils in their blood and is only used once every 2 weeks,” added Mannino, who has served as a consultant to companies developing COPD drugs.

Both dupilumab and ensifentrine, a phosphodiesterase (PDE) 3 and PDE4 inhibitor also recently approved for maintenance treatment of COPD, have been shown in clinical trials to reduce exacerbations and improve symptoms, said Mannino. Both offer additional options for patients who continue to have symptoms and exacerbations in spite of their current therapy.

Some barriers to the use of biologics in practice include the high cost. “Access and overcoming insurance-related issues such as preauthorization and high copays will be a challenge,” he said. Also, because dupilumab is an injectable drug, some patient training will be required.

Newer biologic therapies in development are also injectables, but some studies are examining longer time intervals as long as every 6 months, which could be a major advancement for some patients. The newer therapies in development are similar to dupilumab in that they will be injected therapies. Some in development are looking at longer time intervals as long as every 6 months, which may be a major advancement for some patients. “All of these therapies, however, are currently targeting more advanced or serious disease,” he said.

Looking ahead, more therapies are needed for the treatment of early COPD, as well as therapies that can be administered to a large number of patients at a reasonable cost, Mannino added.

Rennard disclosed serving as a consultant for Verona Pharma, Sanofi, Beyond Air, RS BioTherapeutics, RespirAI, and Roche, as well as speaker fees from Sanofi and temporary ownership interest while employed by AstraZeneca. Rennard is also the founder of Great Plains Biometrix. Bafadhel disclosed funding from the National Institute for Health Research (NIHR), grants from Asthma + Lung UK, Horizon Europe, NIHR, and AstraZeneca to her institution, and honoraria from AstraZeneca, Boehringer Ingelheim, Chiesi, GlaxoSmithKline, Novartis, and Pfizer. Singh disclosed relationships including speaking sponsorships, honoraria, and advisory board memberships for Adovate, Aerogen, Almirall, Apogee, Arrowhead, AstraZeneca, Bial, Boehringer Ingelheim, Chiesi, Cipla, Connect Biopharm, Covis, CSL Behring, DevPro Biopharm, Elpen, Empirico, EpiEndo, Genentech, Generate Biomedicines, GlaxoSmithKline, Glenmark, Kamada, Kinaset Therapeutics, Kymera, Menarini, MicroA, OM Pharma, Orion, Pieris Pharmaceuticals, Pulmatrix, Revolo, Roivant Sciences, Sanofi, Synairgen, Tetherex, Teva, Theravance Biopharma, Upstream, and Verona Pharma. Mannino disclosed serving as a consultant to multiple companies currently developing COPD therapies (AstraZeneca, GlaxoSmithKline, Roche, Regeneron, Sanofi, Genentech, Amgen, and Chiesi).

A version of this article appeared on Medscape.com.

New biologic drugs for chronic obstructive pulmonary disease (COPD) are finally here, said Stephen Rennard, MD, in a presentation in a session on new drugs at the 2024 GOLD International COPD Conference.

The inflammatory pathways associated with COPD are diverse and offer a range of potential targets for biologics, said Rennard, a professor of pulmonary, critical care, and sleep medicine at the University of Nebraska Medical Center, Omaha. 

The therapeutic goals of biologics remain the same as with other treatments for COPD, namely restoration of normal inflammatory response and alteration of disease progression, as well as restoration of lost structure and function and improvement of systemic effects, Rennard said in his presentation. Most studies of new and up-and-coming drugs have improvement in acute exacerbation of COPD as the primary outcome.

 

The Biology Behind the Biologics

T2 inflammation is “an inflammatory cascade led by IL [interleukin]-4, IL-13, and IL-5,” Mona Bafadhel, MD, chair of Respiratory Medicine at King’s College London in England, said in her presentation during the session.

Bafadhel, who served as one of the investigators on the BOREAS and NOTUS studies, explained some of the science behind the development of the new biologics.

Eosinophils are powerful regulators of immune response and inflammation by stimulating T-cell production and affecting other immune cell types, she noted.

In the context of COPD and drug development, high blood eosinophil counts have been associated with increased COPD-related exacerbations, Bafadhel said. She cited data from a Dutch study of more than 7000 patients with COPD (with and without clinical diagnoses), in which absolute eosinophil counts ≥ 3.3% were associated with increased risk for severe exacerbations of 32% and 84% across all patients with COPD and clinical COPD, respectively.

Understanding the mechanisms of the eosinophil in COPD is important for research and development, Bafadhel said. Along with standardizing measurement of T2 inflammatory markers (IL-4, IL-13, and IL-5), more research is needed to fully understand the role of eosinophils in immunoregulation and repair.

 

Fitting the Biologic to the Patient

Several recent studies of up-and-coming biologics have focused on subsets of COPD patients, said Dave Singh, MD, professor of clinical pharmacology and respiratory medicine at The University of Manchester in England, in his presentation at the meeting. In September 2024, the Food and Drug Administration approved dupilumab as the first biologic treatment for patients with uncontrolled COPD and type 2 inflammation on the basis of eosinophil counts. Singh cited data from the BOREAS and NOTUS studies in which dupilumab significantly reduced exacerbations and improved lung function in these patients, compared with a placebo.

Mepolizumab, a biologic approved for asthma, is not currently approved for COPD, but data from a 2017 study showed a trend toward reduced exacerbations, compared with placebo, in a subset of patients with high blood eosinophil counts, Singh said.

In addition, a recent unpublished phase 3 study (MATINEE) showed a reduction in the annualized rate of exacerbations, compared with placebo, on the basis of up to 2 years’ follow-up.

Singh also highlighted data from a phase 2a study of astegolimab, a biologic drug that focuses on the IL-33 receptor, in which COPD exacerbation rates were not significantly different between treatment and placebo groups. However, astegolimab has shown safety and efficacy in adults with severe asthma and is under development in phase 3 trials for COPD.

Tezepelumab, which was approved by the FDA in 2021 as an add-on therapy for severe asthma in patients aged 12 years or older, is also in development as a therapy for COPD exacerbations, Singh said.

In a study presented at the 2024 American Thoracic Society annual meeting, Singh and colleagues found that tezepelumab at a subcutaneous dose of 420 mg every 4 weeks reduced the annualized rate of moderate or severe COPD exacerbations compared with placebo based on data from approximately 300 patients, although the difference was not statistically significant.

Itepekimab, another biologic, showed promise in a phase 2a genetic association study involving current and former smokers with moderate to severe COPD, Singh said.

In that study, published in 2022 in The Lancet Respiratory Medicine, itepekimab failed to meet the primary endpoint in the overall study population of reduced annualized rate of moderate to severe exacerbations; however, a subgroup analysis of former smokers showed a significant (42%) reduction in exacerbations, Singh said in his presentation. Two phase 3 clinical studies (AERIFY-1/2) are ongoing to confirm the safety and efficacy of itepekimab in former smokers with COPD.

 

Takeaways and Next Steps

“These therapies provide the first new classes of medications approved for COPD in nearly 20 years,” said David M. Mannino, MD, of the University of Kentucky, Lexington, in an interview. “Dupilumab will be available to a subset of patients who are poorly controlled and have evidence of high eosinophils in their blood and is only used once every 2 weeks,” added Mannino, who has served as a consultant to companies developing COPD drugs.

Both dupilumab and ensifentrine, a phosphodiesterase (PDE) 3 and PDE4 inhibitor also recently approved for maintenance treatment of COPD, have been shown in clinical trials to reduce exacerbations and improve symptoms, said Mannino. Both offer additional options for patients who continue to have symptoms and exacerbations in spite of their current therapy.

Some barriers to the use of biologics in practice include the high cost. “Access and overcoming insurance-related issues such as preauthorization and high copays will be a challenge,” he said. Also, because dupilumab is an injectable drug, some patient training will be required.

Newer biologic therapies in development are also injectables, but some studies are examining longer time intervals as long as every 6 months, which could be a major advancement for some patients. The newer therapies in development are similar to dupilumab in that they will be injected therapies. Some in development are looking at longer time intervals as long as every 6 months, which may be a major advancement for some patients. “All of these therapies, however, are currently targeting more advanced or serious disease,” he said.

Looking ahead, more therapies are needed for the treatment of early COPD, as well as therapies that can be administered to a large number of patients at a reasonable cost, Mannino added.

Rennard disclosed serving as a consultant for Verona Pharma, Sanofi, Beyond Air, RS BioTherapeutics, RespirAI, and Roche, as well as speaker fees from Sanofi and temporary ownership interest while employed by AstraZeneca. Rennard is also the founder of Great Plains Biometrix. Bafadhel disclosed funding from the National Institute for Health Research (NIHR), grants from Asthma + Lung UK, Horizon Europe, NIHR, and AstraZeneca to her institution, and honoraria from AstraZeneca, Boehringer Ingelheim, Chiesi, GlaxoSmithKline, Novartis, and Pfizer. Singh disclosed relationships including speaking sponsorships, honoraria, and advisory board memberships for Adovate, Aerogen, Almirall, Apogee, Arrowhead, AstraZeneca, Bial, Boehringer Ingelheim, Chiesi, Cipla, Connect Biopharm, Covis, CSL Behring, DevPro Biopharm, Elpen, Empirico, EpiEndo, Genentech, Generate Biomedicines, GlaxoSmithKline, Glenmark, Kamada, Kinaset Therapeutics, Kymera, Menarini, MicroA, OM Pharma, Orion, Pieris Pharmaceuticals, Pulmatrix, Revolo, Roivant Sciences, Sanofi, Synairgen, Tetherex, Teva, Theravance Biopharma, Upstream, and Verona Pharma. Mannino disclosed serving as a consultant to multiple companies currently developing COPD therapies (AstraZeneca, GlaxoSmithKline, Roche, Regeneron, Sanofi, Genentech, Amgen, and Chiesi).

A version of this article appeared on Medscape.com.

Candida auris, a yeast-like fungus, is spreading globally, increasing the urgency for enhanced surveillance, new therapies, and more antimicrobial stewardship to combat its multidrug-resistant strains.

Since its discovery in 2009, C auris has been found in more than 50 countries across six continents, including Asia, Africa, and the Americas, according to the World Health Organization. In 2022, CDC reported 2377 clinical cases and 5754 screening cases of C auris in the United States.

Most fungi cannot infect humans because they cannot grow at 98 °F. But as the world warms, some fungi like C auris are adapting — and infecting humans. 

In September, The Lancet Microbe reported on three C auris isolates from a Singapore hospital belonging to a new clade (clade six), “which is phenotypically and genotypically distinct” from the first five clades, the authors wrote. In June, Microbiology Spectrum published a study about two unusual C auris isolates from a Bangladesh NICU in 2021. They were also assigned to clade six “with potential for international transmission,” the study authors noted.

C auris has all the hallmarks of “critical pathogen,” as defined by the World Health Organization in 2022. It increases morbidity and mortality for affected patients, is difficult to eradicate in hospitals, and can be treatment resistant.

As a result, infectious disease specialists are raising more awareness and advocating for greater surveillance of C auris colonization and disease in the hospital setting for high-risk patients.

Arturo Casadevall, MD, PhD, MS, is one of them. “C auris could be a problem in your hospital as fungal diseases are getting worse every year,” said Casadevall, chair of Molecular Microbiology and Immunology at Johns Hopkins Bloomberg School of Public Health in Baltimore. The increasing number of cases “is incremental, but when [we] look at the data over years, it is a growing problem. We may see more of these cases in the coming years.”

 

Expediting Diagnoses

Symptoms of C auris disease vary and can cause invasive infections, such as bloodstream or intra-abdominal infections. This is why Casadevall encourages infectious disease specialists to “always consider fungal disease when you are approaching an individual. The diagnosis is sometimes delayed because you don’t look for it,” he said.

C auris can also be misidentified in the lab “when using traditional biochemical methods for yeast identification. Accurate identification of C auris requires use of sequencing or mass spectrometry,” according to CDC.

C auris is typically found on the skin of colonized patients and can enter the body through invasive devices, incisions, wounds, and during surgery. Mostly, immunosuppressed patients are at risk for serious fungal disease, Casadevall said.

Invasive fungal disease can be life-threatening for hospitalized patients. In one review of 37 studies from 2011 to 2021, researchers found that overall mortality rates for C auris infections ranged from 29% to 62%, with 30-day mortality rates between 23% and 67%, Medical Mycology reported. Patients typically had a median hospital stay of 46-68 days, sometimes extending up to 140 days. Late-onset complications included metastatic septic issues, according to the study.  

 

Overcoming Treatment-Resistant Strains

A resilient yeast, C auris shows higher resistance to antifungal treatments compared to other Candida species, JAMA reported. Echinocandins are the first-line treatment for adults and children over 2 months old “and some of those therapies are already resistant,” said George Thompson, MD, professor of clinical medicine at the University of California Davis School of Medicine, Davis, California. The second line is liposomal amphotericin B (5 mg/kg daily), but it has toxicity problems, Thompson said.

New therapies sans toxicity are needed to treat C auris disease. Thompson, eg, served as the principal investigator in the ReSTORE trial to study a new therapy (rezafungin for injection). In March 2023, the US Food and Drug Administration approved the treatment for candidemia and invasive candidiasis in adults with limited or no alternative treatment options.

Thompson has observed that patients with C auris disease can present with “an infection in the urinary system with burning, pain, and bladder spasms. In the majority of cases of candida sepsis, the patients will have it in their blood stream with fever, chills, and sweats,” he said. The new treatment may clear the infection quickly, said Thompson, who noted results published in The Lancet. 

 

Infection Prevention and Antimicrobial Stewardship

Institutions like University of Michigan Health (U-M Health) in Ann Arbor, Michigan, have increased measures to tackle the issue from different angles. 

To address the broader issue of treatment-resistant fungal disease, U-M Health “has a robust antimicrobial stewardship program in place,” said Laraine Lynn Washer, MD, infectious disease physician.

The program includes oversight and restriction of various antifungals to avoid potential for overuse that could lead to increased risk for antifungal resistance. Use of echinocandins, for example, “requires prior approval by our antimicrobial stewardship team members,” said Washer, who is also Clinical Professor of Infectious Diseases and the Medical Director of Infection Prevention of Epidemiology at U-M Health.

Infection prevention measures entail screening hospitalized adult patients for risk factors for C auris, such as:

• Overnight international hospitalization
• Recent stay in a long-term acute care facility
• Recent stay in a ventilator skilled nursing facility.

“If a patient has these risk factors, we perform testing to assess for colonization (presence of C auris without infection) by obtaining skin swabs from the axilla and the groin and asking our lab to perform PCR to identify genetic elements of C auris,” Washer said. “Patients who are transferred directly from another hospital ICU to our ICU also undergo testing for colonization.”

If a patient is identified with C auris, hospitals ought to perform screening tests using cultures or PCR “on other patients who may have overlapped in time and space with the patient such as hospital roommates,” Washer explained. 

Once in a hospital environment, the pathogen is hard to eradicate. C auris has a unique ability to be transmitted in the healthcare environment, is relatively heat tolerant, and is resistant to some common disinfectants, Washer added. The yeast can survive for over 2 weeks on plastic and months on skin, JAMA reported.

“Hospitals should partner with local and state level public health authorities in reporting cases of Candida auris and assist in any contact investigations as requested by public health authorities,” Washer advised.

Casadevall and Washer reported no conflicts of interest. Thompson has consulted and received research funding from Astellas, Basilea, Cidara, F2G, GSK, Melinta, Mundipharma, Pfizer, and Scynexis.

 

A version of this article appeared on Medscape.com.

Candida auris, a yeast-like fungus, is spreading globally, increasing the urgency for enhanced surveillance, new therapies, and more antimicrobial stewardship to combat its multidrug-resistant strains.

Since its discovery in 2009, C auris has been found in more than 50 countries across six continents, including Asia, Africa, and the Americas, according to the World Health Organization. In 2022, CDC reported 2377 clinical cases and 5754 screening cases of C auris in the United States.

Most fungi cannot infect humans because they cannot grow at 98 °F. But as the world warms, some fungi like C auris are adapting — and infecting humans. 

In September, The Lancet Microbe reported on three C auris isolates from a Singapore hospital belonging to a new clade (clade six), “which is phenotypically and genotypically distinct” from the first five clades, the authors wrote. In June, Microbiology Spectrum published a study about two unusual C auris isolates from a Bangladesh NICU in 2021. They were also assigned to clade six “with potential for international transmission,” the study authors noted.

C auris has all the hallmarks of “critical pathogen,” as defined by the World Health Organization in 2022. It increases morbidity and mortality for affected patients, is difficult to eradicate in hospitals, and can be treatment resistant.

As a result, infectious disease specialists are raising more awareness and advocating for greater surveillance of C auris colonization and disease in the hospital setting for high-risk patients.

Arturo Casadevall, MD, PhD, MS, is one of them. “C auris could be a problem in your hospital as fungal diseases are getting worse every year,” said Casadevall, chair of Molecular Microbiology and Immunology at Johns Hopkins Bloomberg School of Public Health in Baltimore. The increasing number of cases “is incremental, but when [we] look at the data over years, it is a growing problem. We may see more of these cases in the coming years.”

 

Expediting Diagnoses

Symptoms of C auris disease vary and can cause invasive infections, such as bloodstream or intra-abdominal infections. This is why Casadevall encourages infectious disease specialists to “always consider fungal disease when you are approaching an individual. The diagnosis is sometimes delayed because you don’t look for it,” he said.

C auris can also be misidentified in the lab “when using traditional biochemical methods for yeast identification. Accurate identification of C auris requires use of sequencing or mass spectrometry,” according to CDC.

C auris is typically found on the skin of colonized patients and can enter the body through invasive devices, incisions, wounds, and during surgery. Mostly, immunosuppressed patients are at risk for serious fungal disease, Casadevall said.

Invasive fungal disease can be life-threatening for hospitalized patients. In one review of 37 studies from 2011 to 2021, researchers found that overall mortality rates for C auris infections ranged from 29% to 62%, with 30-day mortality rates between 23% and 67%, Medical Mycology reported. Patients typically had a median hospital stay of 46-68 days, sometimes extending up to 140 days. Late-onset complications included metastatic septic issues, according to the study.  

 

Overcoming Treatment-Resistant Strains

A resilient yeast, C auris shows higher resistance to antifungal treatments compared to other Candida species, JAMA reported. Echinocandins are the first-line treatment for adults and children over 2 months old “and some of those therapies are already resistant,” said George Thompson, MD, professor of clinical medicine at the University of California Davis School of Medicine, Davis, California. The second line is liposomal amphotericin B (5 mg/kg daily), but it has toxicity problems, Thompson said.

New therapies sans toxicity are needed to treat C auris disease. Thompson, eg, served as the principal investigator in the ReSTORE trial to study a new therapy (rezafungin for injection). In March 2023, the US Food and Drug Administration approved the treatment for candidemia and invasive candidiasis in adults with limited or no alternative treatment options.

Thompson has observed that patients with C auris disease can present with “an infection in the urinary system with burning, pain, and bladder spasms. In the majority of cases of candida sepsis, the patients will have it in their blood stream with fever, chills, and sweats,” he said. The new treatment may clear the infection quickly, said Thompson, who noted results published in The Lancet. 

 

Infection Prevention and Antimicrobial Stewardship

Institutions like University of Michigan Health (U-M Health) in Ann Arbor, Michigan, have increased measures to tackle the issue from different angles. 

To address the broader issue of treatment-resistant fungal disease, U-M Health “has a robust antimicrobial stewardship program in place,” said Laraine Lynn Washer, MD, infectious disease physician.

The program includes oversight and restriction of various antifungals to avoid potential for overuse that could lead to increased risk for antifungal resistance. Use of echinocandins, for example, “requires prior approval by our antimicrobial stewardship team members,” said Washer, who is also Clinical Professor of Infectious Diseases and the Medical Director of Infection Prevention of Epidemiology at U-M Health.

Infection prevention measures entail screening hospitalized adult patients for risk factors for C auris, such as:

• Overnight international hospitalization
• Recent stay in a long-term acute care facility
• Recent stay in a ventilator skilled nursing facility.

“If a patient has these risk factors, we perform testing to assess for colonization (presence of C auris without infection) by obtaining skin swabs from the axilla and the groin and asking our lab to perform PCR to identify genetic elements of C auris,” Washer said. “Patients who are transferred directly from another hospital ICU to our ICU also undergo testing for colonization.”

If a patient is identified with C auris, hospitals ought to perform screening tests using cultures or PCR “on other patients who may have overlapped in time and space with the patient such as hospital roommates,” Washer explained. 

Once in a hospital environment, the pathogen is hard to eradicate. C auris has a unique ability to be transmitted in the healthcare environment, is relatively heat tolerant, and is resistant to some common disinfectants, Washer added. The yeast can survive for over 2 weeks on plastic and months on skin, JAMA reported.

“Hospitals should partner with local and state level public health authorities in reporting cases of Candida auris and assist in any contact investigations as requested by public health authorities,” Washer advised.

Casadevall and Washer reported no conflicts of interest. Thompson has consulted and received research funding from Astellas, Basilea, Cidara, F2G, GSK, Melinta, Mundipharma, Pfizer, and Scynexis.

 

A version of this article appeared on Medscape.com.

Candida auris, a yeast-like fungus, is spreading globally, increasing the urgency for enhanced surveillance, new therapies, and more antimicrobial stewardship to combat its multidrug-resistant strains.

Since its discovery in 2009, C auris has been found in more than 50 countries across six continents, including Asia, Africa, and the Americas, according to the World Health Organization. In 2022, CDC reported 2377 clinical cases and 5754 screening cases of C auris in the United States.

Most fungi cannot infect humans because they cannot grow at 98 °F. But as the world warms, some fungi like C auris are adapting — and infecting humans. 

In September, The Lancet Microbe reported on three C auris isolates from a Singapore hospital belonging to a new clade (clade six), “which is phenotypically and genotypically distinct” from the first five clades, the authors wrote. In June, Microbiology Spectrum published a study about two unusual C auris isolates from a Bangladesh NICU in 2021. They were also assigned to clade six “with potential for international transmission,” the study authors noted.

C auris has all the hallmarks of “critical pathogen,” as defined by the World Health Organization in 2022. It increases morbidity and mortality for affected patients, is difficult to eradicate in hospitals, and can be treatment resistant.

As a result, infectious disease specialists are raising more awareness and advocating for greater surveillance of C auris colonization and disease in the hospital setting for high-risk patients.

Arturo Casadevall, MD, PhD, MS, is one of them. “C auris could be a problem in your hospital as fungal diseases are getting worse every year,” said Casadevall, chair of Molecular Microbiology and Immunology at Johns Hopkins Bloomberg School of Public Health in Baltimore. The increasing number of cases “is incremental, but when [we] look at the data over years, it is a growing problem. We may see more of these cases in the coming years.”

 

Expediting Diagnoses

Symptoms of C auris disease vary and can cause invasive infections, such as bloodstream or intra-abdominal infections. This is why Casadevall encourages infectious disease specialists to “always consider fungal disease when you are approaching an individual. The diagnosis is sometimes delayed because you don’t look for it,” he said.

C auris can also be misidentified in the lab “when using traditional biochemical methods for yeast identification. Accurate identification of C auris requires use of sequencing or mass spectrometry,” according to CDC.

C auris is typically found on the skin of colonized patients and can enter the body through invasive devices, incisions, wounds, and during surgery. Mostly, immunosuppressed patients are at risk for serious fungal disease, Casadevall said.

Invasive fungal disease can be life-threatening for hospitalized patients. In one review of 37 studies from 2011 to 2021, researchers found that overall mortality rates for C auris infections ranged from 29% to 62%, with 30-day mortality rates between 23% and 67%, Medical Mycology reported. Patients typically had a median hospital stay of 46-68 days, sometimes extending up to 140 days. Late-onset complications included metastatic septic issues, according to the study.  

 

Overcoming Treatment-Resistant Strains

A resilient yeast, C auris shows higher resistance to antifungal treatments compared to other Candida species, JAMA reported. Echinocandins are the first-line treatment for adults and children over 2 months old “and some of those therapies are already resistant,” said George Thompson, MD, professor of clinical medicine at the University of California Davis School of Medicine, Davis, California. The second line is liposomal amphotericin B (5 mg/kg daily), but it has toxicity problems, Thompson said.

New therapies sans toxicity are needed to treat C auris disease. Thompson, eg, served as the principal investigator in the ReSTORE trial to study a new therapy (rezafungin for injection). In March 2023, the US Food and Drug Administration approved the treatment for candidemia and invasive candidiasis in adults with limited or no alternative treatment options.

Thompson has observed that patients with C auris disease can present with “an infection in the urinary system with burning, pain, and bladder spasms. In the majority of cases of candida sepsis, the patients will have it in their blood stream with fever, chills, and sweats,” he said. The new treatment may clear the infection quickly, said Thompson, who noted results published in The Lancet. 

 

Infection Prevention and Antimicrobial Stewardship

Institutions like University of Michigan Health (U-M Health) in Ann Arbor, Michigan, have increased measures to tackle the issue from different angles. 

To address the broader issue of treatment-resistant fungal disease, U-M Health “has a robust antimicrobial stewardship program in place,” said Laraine Lynn Washer, MD, infectious disease physician.

The program includes oversight and restriction of various antifungals to avoid potential for overuse that could lead to increased risk for antifungal resistance. Use of echinocandins, for example, “requires prior approval by our antimicrobial stewardship team members,” said Washer, who is also Clinical Professor of Infectious Diseases and the Medical Director of Infection Prevention of Epidemiology at U-M Health.

Infection prevention measures entail screening hospitalized adult patients for risk factors for C auris, such as:

• Overnight international hospitalization
• Recent stay in a long-term acute care facility
• Recent stay in a ventilator skilled nursing facility.

“If a patient has these risk factors, we perform testing to assess for colonization (presence of C auris without infection) by obtaining skin swabs from the axilla and the groin and asking our lab to perform PCR to identify genetic elements of C auris,” Washer said. “Patients who are transferred directly from another hospital ICU to our ICU also undergo testing for colonization.”

If a patient is identified with C auris, hospitals ought to perform screening tests using cultures or PCR “on other patients who may have overlapped in time and space with the patient such as hospital roommates,” Washer explained. 

Once in a hospital environment, the pathogen is hard to eradicate. C auris has a unique ability to be transmitted in the healthcare environment, is relatively heat tolerant, and is resistant to some common disinfectants, Washer added. The yeast can survive for over 2 weeks on plastic and months on skin, JAMA reported.

“Hospitals should partner with local and state level public health authorities in reporting cases of Candida auris and assist in any contact investigations as requested by public health authorities,” Washer advised.

Casadevall and Washer reported no conflicts of interest. Thompson has consulted and received research funding from Astellas, Basilea, Cidara, F2G, GSK, Melinta, Mundipharma, Pfizer, and Scynexis.

 

A version of this article appeared on Medscape.com.

This transcript has been edited for clarity. 

I’d like to reflect a little on the ever-rising incidence of early-onset colorectal cancer. I saw two patients in the clinic on Friday, both in their early thirties, presenting with stage IV disease. Both had young families — a disaster.

This is an issue that we must address, I think, epidemiologically. We know that early-onset colorectal cancer is defined as a disease arising in those under the age of 50. There’s been a very sharp increase globally over the past 20-30 years, and currently, around 200,000 such cases are diagnosed every year, but it is said to increase unquestionably.

The epidemiologists, I think, correctly have identified that this sharp, rapid increase does imply that there is a new environmental change that is underpinning or underscoring this rise in early-onset disease. 

There’s a fantastic team that has been put together by Paul Brennan, Mike Stratton, and colleagues, a collaborative group of epidemiologists, geneticists, and bioinformaticians, who are looking at a global study to try to understand the basis of early-onset colorectal cancer. Their approach is to combine conventional epidemiology, genomics, and fantastic computational support to try to unpick the mutational signatures involved.

The dominant hypothesis is that, over the past 20-25 years or so, there has been a change in diet that has allowed an alteration in the gut microbiome such that we now harbor, in some cases, more bacteria capable of manufacturing, synthesizing, and releasing mutagenic chemicals. There’s a subtype of Escherichia coli which manufactures one such mutagen called colibactin.

Again, through some of the painstaking, extraordinary work that Mike Stratton and colleagues have done at the Sanger Institute, they have managed to, using a variety of different techniques — in vitro, observational, and so on — relate exposure to the mutagen colibactin to a particular mutational signature.

They plan to do a large global study — one of the strengths — involving many different countries around the globe, collect material from older colorectal cancer patients and early-onset colorectal cancer patients, and undertake a staggeringly large mutational study to see if the mutational signature associated with colibactin is more highly represented in these early-onset cases. The hypothesis is that, if you’re exposed to this mutagen in childhood, then it increases the tumor mutational burden and therefore the likelihood of developing cancer at an earlier age. 

All of us believe that converting a normal cell into a tumor cell usually requires five or six or seven separate mutational events occurring at random. The earlier these occur, the greater the tumor, the greater the normal single-cellular mutational burden, and the more likely it is to develop cancer sooner rather than later. 

This is a fantastically interesting study, and it’s the way ahead with modern genetic epidemiology, one would say. We wish them well. This will be a 3- to 5-year truly international effort, bringing together a genuinely internationally outstanding research team. We hope that they are able to shed more light on the epidemiology of this early-onset disease, because only by understanding can we deflect and deal with it. 

Knowledge is power, as I’ve said many times before. If we understand the underlying epidemiology, that will allow us to intervene, one would hope, and avoid the chaotic disaster of my clinic on Friday, with these two young patients with an extremely limited lifespan and large families who will be left bereft in having lost a parent.

More power to the team. We wish them well with the study, but again, this is a pointer to the future, one would hope, of modern genetic computational epidemiology. 

I’d be really interested in any ideas or comments that you might have. Are you in the field? Are you seeing more young patients? Do you have any ideas or hypotheses of your own around the microbiome and what bugs might be involved and so on?

Dr. Kerr, Professor, Nuffield Department of Clinical Laboratory Science, University of Oxford, England; Professor of Cancer Medicine, Oxford Cancer Centre, Oxford, United Kingdom, has disclosed relevant financial relationships with Celleron Therapeutics, Oxford Cancer Biomarkers, Afrox, GlaxoSmithKline, Bayer, Genomic Health, Merck Serono, and Roche. 

A version of this article appeared on Medscape.com.

This transcript has been edited for clarity. 

I’d like to reflect a little on the ever-rising incidence of early-onset colorectal cancer. I saw two patients in the clinic on Friday, both in their early thirties, presenting with stage IV disease. Both had young families — a disaster.

This is an issue that we must address, I think, epidemiologically. We know that early-onset colorectal cancer is defined as a disease arising in those under the age of 50. There’s been a very sharp increase globally over the past 20-30 years, and currently, around 200,000 such cases are diagnosed every year, but it is said to increase unquestionably.

The epidemiologists, I think, correctly have identified that this sharp, rapid increase does imply that there is a new environmental change that is underpinning or underscoring this rise in early-onset disease. 

There’s a fantastic team that has been put together by Paul Brennan, Mike Stratton, and colleagues, a collaborative group of epidemiologists, geneticists, and bioinformaticians, who are looking at a global study to try to understand the basis of early-onset colorectal cancer. Their approach is to combine conventional epidemiology, genomics, and fantastic computational support to try to unpick the mutational signatures involved.

The dominant hypothesis is that, over the past 20-25 years or so, there has been a change in diet that has allowed an alteration in the gut microbiome such that we now harbor, in some cases, more bacteria capable of manufacturing, synthesizing, and releasing mutagenic chemicals. There’s a subtype of Escherichia coli which manufactures one such mutagen called colibactin.

Again, through some of the painstaking, extraordinary work that Mike Stratton and colleagues have done at the Sanger Institute, they have managed to, using a variety of different techniques — in vitro, observational, and so on — relate exposure to the mutagen colibactin to a particular mutational signature.

They plan to do a large global study — one of the strengths — involving many different countries around the globe, collect material from older colorectal cancer patients and early-onset colorectal cancer patients, and undertake a staggeringly large mutational study to see if the mutational signature associated with colibactin is more highly represented in these early-onset cases. The hypothesis is that, if you’re exposed to this mutagen in childhood, then it increases the tumor mutational burden and therefore the likelihood of developing cancer at an earlier age. 

All of us believe that converting a normal cell into a tumor cell usually requires five or six or seven separate mutational events occurring at random. The earlier these occur, the greater the tumor, the greater the normal single-cellular mutational burden, and the more likely it is to develop cancer sooner rather than later. 

This is a fantastically interesting study, and it’s the way ahead with modern genetic epidemiology, one would say. We wish them well. This will be a 3- to 5-year truly international effort, bringing together a genuinely internationally outstanding research team. We hope that they are able to shed more light on the epidemiology of this early-onset disease, because only by understanding can we deflect and deal with it. 

Knowledge is power, as I’ve said many times before. If we understand the underlying epidemiology, that will allow us to intervene, one would hope, and avoid the chaotic disaster of my clinic on Friday, with these two young patients with an extremely limited lifespan and large families who will be left bereft in having lost a parent.

More power to the team. We wish them well with the study, but again, this is a pointer to the future, one would hope, of modern genetic computational epidemiology. 

I’d be really interested in any ideas or comments that you might have. Are you in the field? Are you seeing more young patients? Do you have any ideas or hypotheses of your own around the microbiome and what bugs might be involved and so on?

Dr. Kerr, Professor, Nuffield Department of Clinical Laboratory Science, University of Oxford, England; Professor of Cancer Medicine, Oxford Cancer Centre, Oxford, United Kingdom, has disclosed relevant financial relationships with Celleron Therapeutics, Oxford Cancer Biomarkers, Afrox, GlaxoSmithKline, Bayer, Genomic Health, Merck Serono, and Roche. 

A version of this article appeared on Medscape.com.

This transcript has been edited for clarity. 

I’d like to reflect a little on the ever-rising incidence of early-onset colorectal cancer. I saw two patients in the clinic on Friday, both in their early thirties, presenting with stage IV disease. Both had young families — a disaster.

This is an issue that we must address, I think, epidemiologically. We know that early-onset colorectal cancer is defined as a disease arising in those under the age of 50. There’s been a very sharp increase globally over the past 20-30 years, and currently, around 200,000 such cases are diagnosed every year, but it is said to increase unquestionably.

The epidemiologists, I think, correctly have identified that this sharp, rapid increase does imply that there is a new environmental change that is underpinning or underscoring this rise in early-onset disease. 

There’s a fantastic team that has been put together by Paul Brennan, Mike Stratton, and colleagues, a collaborative group of epidemiologists, geneticists, and bioinformaticians, who are looking at a global study to try to understand the basis of early-onset colorectal cancer. Their approach is to combine conventional epidemiology, genomics, and fantastic computational support to try to unpick the mutational signatures involved.

The dominant hypothesis is that, over the past 20-25 years or so, there has been a change in diet that has allowed an alteration in the gut microbiome such that we now harbor, in some cases, more bacteria capable of manufacturing, synthesizing, and releasing mutagenic chemicals. There’s a subtype of Escherichia coli which manufactures one such mutagen called colibactin.

Again, through some of the painstaking, extraordinary work that Mike Stratton and colleagues have done at the Sanger Institute, they have managed to, using a variety of different techniques — in vitro, observational, and so on — relate exposure to the mutagen colibactin to a particular mutational signature.

They plan to do a large global study — one of the strengths — involving many different countries around the globe, collect material from older colorectal cancer patients and early-onset colorectal cancer patients, and undertake a staggeringly large mutational study to see if the mutational signature associated with colibactin is more highly represented in these early-onset cases. The hypothesis is that, if you’re exposed to this mutagen in childhood, then it increases the tumor mutational burden and therefore the likelihood of developing cancer at an earlier age. 

All of us believe that converting a normal cell into a tumor cell usually requires five or six or seven separate mutational events occurring at random. The earlier these occur, the greater the tumor, the greater the normal single-cellular mutational burden, and the more likely it is to develop cancer sooner rather than later. 

This is a fantastically interesting study, and it’s the way ahead with modern genetic epidemiology, one would say. We wish them well. This will be a 3- to 5-year truly international effort, bringing together a genuinely internationally outstanding research team. We hope that they are able to shed more light on the epidemiology of this early-onset disease, because only by understanding can we deflect and deal with it. 

Knowledge is power, as I’ve said many times before. If we understand the underlying epidemiology, that will allow us to intervene, one would hope, and avoid the chaotic disaster of my clinic on Friday, with these two young patients with an extremely limited lifespan and large families who will be left bereft in having lost a parent.

More power to the team. We wish them well with the study, but again, this is a pointer to the future, one would hope, of modern genetic computational epidemiology. 

I’d be really interested in any ideas or comments that you might have. Are you in the field? Are you seeing more young patients? Do you have any ideas or hypotheses of your own around the microbiome and what bugs might be involved and so on?

Dr. Kerr, Professor, Nuffield Department of Clinical Laboratory Science, University of Oxford, England; Professor of Cancer Medicine, Oxford Cancer Centre, Oxford, United Kingdom, has disclosed relevant financial relationships with Celleron Therapeutics, Oxford Cancer Biomarkers, Afrox, GlaxoSmithKline, Bayer, Genomic Health, Merck Serono, and Roche. 

A version of this article appeared on Medscape.com.

It’s been a while since I’ve discussed the H5N1 avian influenza clade 2.3.4.4b and its rapid spread in North America. I hope the facts prove me wrong, but many experts have been warning for some time that ideal conditions are forming for this virus, which for now only causes zoonoses, to pose a pandemic threat.

Let me recap for anyone who may have missed some of the developments, either because they work in other medical fields or think that the experience of the COVID-19 pandemic was a worst-case scenario that is unlikely to be repeated in the short term.

 

The Virus Has Flown to Hawaii

According to data from the Centers for Disease Control and Prevention in Atlanta, Georgia, the infection has now affected more than 500 cattle herds in 15 states. There are about 30 outbreaks reported in poultry, equally distributed between backyard and farm-raised birds, primarily located in California. Here alone, over 3 million birds have been affected. 

Wild birds are believed to have transported the highly pathogenic virus via migration routes across the Pacific, introducing it to Hawaii for the first time. Just days after wastewater analysis detected the presence of H5N1 on the island of Oahu, home to the capital Honolulu, the first outbreak was promptly reported, killing at least a dozen ducks and geese in a backyard coop. Some of these birds had been taken in early November to the Mililani Pet Fair, a sort of domestic animal festival. Local authorities recommended that anyone who attended the fair, touched a duck or goose at the event, and developed symptoms including fever, cough, sore throat, and conjunctivitis, should isolate and seek medical advice.

Meanwhile, more than 50 farmers, animal handlers, or workers involved in the slaughter of cattle or poultry across seven states have been confirmed infected, presumably contracted at their workplace. The latest case, diagnosed recently in Oregon, presented with severe conjunctivitis and mild respiratory symptoms. More than half of these patients have been identified in recent weeks in California, where active surveillance measures have been implemented. However, there is strong suspicion that the actual number of people infected with mild symptoms in the rest of the country is much, much higher.

 

The Red Alert Lights Up in Canada

The level of concern was raised further with news of the first severe — indeed very severe — case of H5N1 avian influenza originating from the western edge of Canada. A teenager (gender not disclosed), previously healthy and without risk factors, was hospitalized with severe respiratory failure in the intensive care unit at British Columbia Children’s Hospital in Vancouver. The source of the infection is unknown, similar to only one other case in Missouri involving an adult already hospitalized for other reasons, which was identified by chance through influenza surveillance programs. We also know that the Canadian adolescent does not live on a farm and had no known contact with potentially infected animals. The only suspicions focus on the family dog, euthanized owing to unspecified health problems in the early days of the epidemiologic investigation. Although the dog tested negative for avian influenza, a necropsy will be conducted to rule out its involvement in the transmission chain.

An initial characterization of the virus has linked it to genotype D1.1, which is circulating among wild birds and poultry farms in Canada’s westernmost province, rather than the strain typical of dairy cows in the United States. The publication of the complete viral sequence over the past weekend has, for the first time, highlighted mutations that could enhance the virus’s ability to infect human cells.

How do we know this? From the highly contested “gain-of-function” studies, which artificially modify viruses to understand which genomic points require the most surveillance — those mutations that can make the infectious agent more virulent or more transmissible between people.

 

Under Special Surveillance for 20 Years

The influenza A (H5N1) avian virus is not new or previously unknown, like SARS-CoV-2, and this could (in theory) give us a slight advantage. We have known about it for decades, and it began infecting humans about 20 years ago, causing pneumonia with respiratory failure. It proved lethal in about half of the cases, but only in people who had close contact with infected poultry, primarily in Southeast Asia.

Hundreds of other human cases occurred worldwide, but always in low-income countries with poor hygiene conditions and where families lived in close contact with animals. This contributed to a false sense of security in Europe and North America, where the threat has been consistently underestimated. Despite an estimated fatality rate of around 50%, the media often labeled scientists’ warnings and health authorities’ efforts to remain prepared as false alarms, tainted by suspicions of catering to the interests of pharmaceutical companies.

Some people may recall the scandal involving Tamiflu, the Roche antiviral oseltamivir, that governments stockpiled when there were fears that the avian virus might acquire the ability to spread among humans. It was dubbed “a false antidote for a false pandemic,” referring to the potential avian pandemic and the 2009 H1N1 influenza pandemic, improperly called “swine flu,” and which turned out to be less severe than expected. There was talk of €2.64 billion being “wasted” to “please” the manufacturer. Although the Cochrane Collaboration made legitimate demands for rigor and transparency in conducting and publishing clinical trials, much of the public, and the journalists who wrote the stories, cared little about these technical aspects. The prevailing message was that stockpiling drugs (or vaccines) for a disease we don’t even know will occur is a waste of taxpayers’ money rather than a prudent preventive measure.

 

More Vulnerable Than Ever

If we were to ascribe strategic thinking to the virus, which it is not capable of, we might argue that it chose the ideal moment to conquer the world. It began circulating in the new clade in 2020, when experts and authorities were focused on the coronavirus. It spread from birds to marine mammals and finally to cattle, exploiting the public’s post-pandemic fatigue, as people no longer wanted to hear about infectious diseases and containment measures. It ultimately rode the wave of political polarization that irrationally equates prevention with supposed cowardice on the left, and recklessness with courageous freedom on the right.

The coincidence between the future appointments announced by the incoming Trump administration and the virus’s accelerated spread deserves attention from decision-makers and health professionals worldwide. The COVID-19 pandemic experience should have taught us that ignoring a threat doesn’t make it go away, if not in our health, then at least in our wallet. The economic repercussions of a virus circulating among animals crucial to our food chain and national economies should concern everyone, well before the threat crosses the ocean, because only then can we defend ourselves.

The proposed Secretary of Health and Human Services, Robert F. Kennedy, is a proponent of the supposed benefits of raw milk, which could serve as a potent vector for the virus. He is ideologically opposed to vaccinations. It’s hard to imagine he would utilize the H5N1 vaccine stockpiles held by the US government for a campaign starting at least with farmers, as was done prophylactically in Finland with products jointly procured by 15 European countries — a group the Italian government decided not to join.

If Kennedy indeed becomes responsible for US public health, it’s reasonable to fear that, in the name of freedom, he will try to delay as much as possible — even if necessary — the obligation to undergo testing and wear masks, not to mention more restrictive infection containment measures. It’s also unlikely he would support and promote the development of new mRNA products already under study, which would become indispensable if the disease begins to spread more easily among people, as well as animals. In such a case, traditional influenza vaccine cultivation methods using chicken eggs would prove too slow and quantitatively insufficient, especially if the virus continues to circulate among poultry.

In short, let’s keep our fingers crossed, but recognize that crossing our fingers might not be enough.

This story was translated from Univadis Italy using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

It’s been a while since I’ve discussed the H5N1 avian influenza clade 2.3.4.4b and its rapid spread in North America. I hope the facts prove me wrong, but many experts have been warning for some time that ideal conditions are forming for this virus, which for now only causes zoonoses, to pose a pandemic threat.

Let me recap for anyone who may have missed some of the developments, either because they work in other medical fields or think that the experience of the COVID-19 pandemic was a worst-case scenario that is unlikely to be repeated in the short term.

 

The Virus Has Flown to Hawaii

According to data from the Centers for Disease Control and Prevention in Atlanta, Georgia, the infection has now affected more than 500 cattle herds in 15 states. There are about 30 outbreaks reported in poultry, equally distributed between backyard and farm-raised birds, primarily located in California. Here alone, over 3 million birds have been affected. 

Wild birds are believed to have transported the highly pathogenic virus via migration routes across the Pacific, introducing it to Hawaii for the first time. Just days after wastewater analysis detected the presence of H5N1 on the island of Oahu, home to the capital Honolulu, the first outbreak was promptly reported, killing at least a dozen ducks and geese in a backyard coop. Some of these birds had been taken in early November to the Mililani Pet Fair, a sort of domestic animal festival. Local authorities recommended that anyone who attended the fair, touched a duck or goose at the event, and developed symptoms including fever, cough, sore throat, and conjunctivitis, should isolate and seek medical advice.

Meanwhile, more than 50 farmers, animal handlers, or workers involved in the slaughter of cattle or poultry across seven states have been confirmed infected, presumably contracted at their workplace. The latest case, diagnosed recently in Oregon, presented with severe conjunctivitis and mild respiratory symptoms. More than half of these patients have been identified in recent weeks in California, where active surveillance measures have been implemented. However, there is strong suspicion that the actual number of people infected with mild symptoms in the rest of the country is much, much higher.

 

The Red Alert Lights Up in Canada

The level of concern was raised further with news of the first severe — indeed very severe — case of H5N1 avian influenza originating from the western edge of Canada. A teenager (gender not disclosed), previously healthy and without risk factors, was hospitalized with severe respiratory failure in the intensive care unit at British Columbia Children’s Hospital in Vancouver. The source of the infection is unknown, similar to only one other case in Missouri involving an adult already hospitalized for other reasons, which was identified by chance through influenza surveillance programs. We also know that the Canadian adolescent does not live on a farm and had no known contact with potentially infected animals. The only suspicions focus on the family dog, euthanized owing to unspecified health problems in the early days of the epidemiologic investigation. Although the dog tested negative for avian influenza, a necropsy will be conducted to rule out its involvement in the transmission chain.

An initial characterization of the virus has linked it to genotype D1.1, which is circulating among wild birds and poultry farms in Canada’s westernmost province, rather than the strain typical of dairy cows in the United States. The publication of the complete viral sequence over the past weekend has, for the first time, highlighted mutations that could enhance the virus’s ability to infect human cells.

How do we know this? From the highly contested “gain-of-function” studies, which artificially modify viruses to understand which genomic points require the most surveillance — those mutations that can make the infectious agent more virulent or more transmissible between people.

 

Under Special Surveillance for 20 Years

The influenza A (H5N1) avian virus is not new or previously unknown, like SARS-CoV-2, and this could (in theory) give us a slight advantage. We have known about it for decades, and it began infecting humans about 20 years ago, causing pneumonia with respiratory failure. It proved lethal in about half of the cases, but only in people who had close contact with infected poultry, primarily in Southeast Asia.

Hundreds of other human cases occurred worldwide, but always in low-income countries with poor hygiene conditions and where families lived in close contact with animals. This contributed to a false sense of security in Europe and North America, where the threat has been consistently underestimated. Despite an estimated fatality rate of around 50%, the media often labeled scientists’ warnings and health authorities’ efforts to remain prepared as false alarms, tainted by suspicions of catering to the interests of pharmaceutical companies.

Some people may recall the scandal involving Tamiflu, the Roche antiviral oseltamivir, that governments stockpiled when there were fears that the avian virus might acquire the ability to spread among humans. It was dubbed “a false antidote for a false pandemic,” referring to the potential avian pandemic and the 2009 H1N1 influenza pandemic, improperly called “swine flu,” and which turned out to be less severe than expected. There was talk of €2.64 billion being “wasted” to “please” the manufacturer. Although the Cochrane Collaboration made legitimate demands for rigor and transparency in conducting and publishing clinical trials, much of the public, and the journalists who wrote the stories, cared little about these technical aspects. The prevailing message was that stockpiling drugs (or vaccines) for a disease we don’t even know will occur is a waste of taxpayers’ money rather than a prudent preventive measure.

 

More Vulnerable Than Ever

If we were to ascribe strategic thinking to the virus, which it is not capable of, we might argue that it chose the ideal moment to conquer the world. It began circulating in the new clade in 2020, when experts and authorities were focused on the coronavirus. It spread from birds to marine mammals and finally to cattle, exploiting the public’s post-pandemic fatigue, as people no longer wanted to hear about infectious diseases and containment measures. It ultimately rode the wave of political polarization that irrationally equates prevention with supposed cowardice on the left, and recklessness with courageous freedom on the right.

The coincidence between the future appointments announced by the incoming Trump administration and the virus’s accelerated spread deserves attention from decision-makers and health professionals worldwide. The COVID-19 pandemic experience should have taught us that ignoring a threat doesn’t make it go away, if not in our health, then at least in our wallet. The economic repercussions of a virus circulating among animals crucial to our food chain and national economies should concern everyone, well before the threat crosses the ocean, because only then can we defend ourselves.

The proposed Secretary of Health and Human Services, Robert F. Kennedy, is a proponent of the supposed benefits of raw milk, which could serve as a potent vector for the virus. He is ideologically opposed to vaccinations. It’s hard to imagine he would utilize the H5N1 vaccine stockpiles held by the US government for a campaign starting at least with farmers, as was done prophylactically in Finland with products jointly procured by 15 European countries — a group the Italian government decided not to join.

If Kennedy indeed becomes responsible for US public health, it’s reasonable to fear that, in the name of freedom, he will try to delay as much as possible — even if necessary — the obligation to undergo testing and wear masks, not to mention more restrictive infection containment measures. It’s also unlikely he would support and promote the development of new mRNA products already under study, which would become indispensable if the disease begins to spread more easily among people, as well as animals. In such a case, traditional influenza vaccine cultivation methods using chicken eggs would prove too slow and quantitatively insufficient, especially if the virus continues to circulate among poultry.

In short, let’s keep our fingers crossed, but recognize that crossing our fingers might not be enough.

This story was translated from Univadis Italy using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

It’s been a while since I’ve discussed the H5N1 avian influenza clade 2.3.4.4b and its rapid spread in North America. I hope the facts prove me wrong, but many experts have been warning for some time that ideal conditions are forming for this virus, which for now only causes zoonoses, to pose a pandemic threat.

Let me recap for anyone who may have missed some of the developments, either because they work in other medical fields or think that the experience of the COVID-19 pandemic was a worst-case scenario that is unlikely to be repeated in the short term.

 

The Virus Has Flown to Hawaii

According to data from the Centers for Disease Control and Prevention in Atlanta, Georgia, the infection has now affected more than 500 cattle herds in 15 states. There are about 30 outbreaks reported in poultry, equally distributed between backyard and farm-raised birds, primarily located in California. Here alone, over 3 million birds have been affected. 

Wild birds are believed to have transported the highly pathogenic virus via migration routes across the Pacific, introducing it to Hawaii for the first time. Just days after wastewater analysis detected the presence of H5N1 on the island of Oahu, home to the capital Honolulu, the first outbreak was promptly reported, killing at least a dozen ducks and geese in a backyard coop. Some of these birds had been taken in early November to the Mililani Pet Fair, a sort of domestic animal festival. Local authorities recommended that anyone who attended the fair, touched a duck or goose at the event, and developed symptoms including fever, cough, sore throat, and conjunctivitis, should isolate and seek medical advice.

Meanwhile, more than 50 farmers, animal handlers, or workers involved in the slaughter of cattle or poultry across seven states have been confirmed infected, presumably contracted at their workplace. The latest case, diagnosed recently in Oregon, presented with severe conjunctivitis and mild respiratory symptoms. More than half of these patients have been identified in recent weeks in California, where active surveillance measures have been implemented. However, there is strong suspicion that the actual number of people infected with mild symptoms in the rest of the country is much, much higher.

 

The Red Alert Lights Up in Canada

The level of concern was raised further with news of the first severe — indeed very severe — case of H5N1 avian influenza originating from the western edge of Canada. A teenager (gender not disclosed), previously healthy and without risk factors, was hospitalized with severe respiratory failure in the intensive care unit at British Columbia Children’s Hospital in Vancouver. The source of the infection is unknown, similar to only one other case in Missouri involving an adult already hospitalized for other reasons, which was identified by chance through influenza surveillance programs. We also know that the Canadian adolescent does not live on a farm and had no known contact with potentially infected animals. The only suspicions focus on the family dog, euthanized owing to unspecified health problems in the early days of the epidemiologic investigation. Although the dog tested negative for avian influenza, a necropsy will be conducted to rule out its involvement in the transmission chain.

An initial characterization of the virus has linked it to genotype D1.1, which is circulating among wild birds and poultry farms in Canada’s westernmost province, rather than the strain typical of dairy cows in the United States. The publication of the complete viral sequence over the past weekend has, for the first time, highlighted mutations that could enhance the virus’s ability to infect human cells.

How do we know this? From the highly contested “gain-of-function” studies, which artificially modify viruses to understand which genomic points require the most surveillance — those mutations that can make the infectious agent more virulent or more transmissible between people.

 

Under Special Surveillance for 20 Years

The influenza A (H5N1) avian virus is not new or previously unknown, like SARS-CoV-2, and this could (in theory) give us a slight advantage. We have known about it for decades, and it began infecting humans about 20 years ago, causing pneumonia with respiratory failure. It proved lethal in about half of the cases, but only in people who had close contact with infected poultry, primarily in Southeast Asia.

Hundreds of other human cases occurred worldwide, but always in low-income countries with poor hygiene conditions and where families lived in close contact with animals. This contributed to a false sense of security in Europe and North America, where the threat has been consistently underestimated. Despite an estimated fatality rate of around 50%, the media often labeled scientists’ warnings and health authorities’ efforts to remain prepared as false alarms, tainted by suspicions of catering to the interests of pharmaceutical companies.

Some people may recall the scandal involving Tamiflu, the Roche antiviral oseltamivir, that governments stockpiled when there were fears that the avian virus might acquire the ability to spread among humans. It was dubbed “a false antidote for a false pandemic,” referring to the potential avian pandemic and the 2009 H1N1 influenza pandemic, improperly called “swine flu,” and which turned out to be less severe than expected. There was talk of €2.64 billion being “wasted” to “please” the manufacturer. Although the Cochrane Collaboration made legitimate demands for rigor and transparency in conducting and publishing clinical trials, much of the public, and the journalists who wrote the stories, cared little about these technical aspects. The prevailing message was that stockpiling drugs (or vaccines) for a disease we don’t even know will occur is a waste of taxpayers’ money rather than a prudent preventive measure.

 

More Vulnerable Than Ever

If we were to ascribe strategic thinking to the virus, which it is not capable of, we might argue that it chose the ideal moment to conquer the world. It began circulating in the new clade in 2020, when experts and authorities were focused on the coronavirus. It spread from birds to marine mammals and finally to cattle, exploiting the public’s post-pandemic fatigue, as people no longer wanted to hear about infectious diseases and containment measures. It ultimately rode the wave of political polarization that irrationally equates prevention with supposed cowardice on the left, and recklessness with courageous freedom on the right.

The coincidence between the future appointments announced by the incoming Trump administration and the virus’s accelerated spread deserves attention from decision-makers and health professionals worldwide. The COVID-19 pandemic experience should have taught us that ignoring a threat doesn’t make it go away, if not in our health, then at least in our wallet. The economic repercussions of a virus circulating among animals crucial to our food chain and national economies should concern everyone, well before the threat crosses the ocean, because only then can we defend ourselves.

The proposed Secretary of Health and Human Services, Robert F. Kennedy, is a proponent of the supposed benefits of raw milk, which could serve as a potent vector for the virus. He is ideologically opposed to vaccinations. It’s hard to imagine he would utilize the H5N1 vaccine stockpiles held by the US government for a campaign starting at least with farmers, as was done prophylactically in Finland with products jointly procured by 15 European countries — a group the Italian government decided not to join.

If Kennedy indeed becomes responsible for US public health, it’s reasonable to fear that, in the name of freedom, he will try to delay as much as possible — even if necessary — the obligation to undergo testing and wear masks, not to mention more restrictive infection containment measures. It’s also unlikely he would support and promote the development of new mRNA products already under study, which would become indispensable if the disease begins to spread more easily among people, as well as animals. In such a case, traditional influenza vaccine cultivation methods using chicken eggs would prove too slow and quantitatively insufficient, especially if the virus continues to circulate among poultry.

In short, let’s keep our fingers crossed, but recognize that crossing our fingers might not be enough.

This story was translated from Univadis Italy using several editorial tools, including artificial intelligence, as part of the process. Human editors reviewed this content before publication. A version of this article appeared on Medscape.com.

WASHINGTON — An investigational 12-protein panel of urinary biomarkers predicted histologically active lupus nephritis (LN) with 86% accuracy, according to research presented at the American College of Rheumatology (ACR) 2024 Annual Meeting.

The noninvasive biomarker panel “robustly predicts meaningful and actionable histological findings” in patients with active proliferative LN, Andrea Fava, MD, assistant professor of medicine in the Division of Rheumatology at Johns Hopkins Medicine in Baltimore, told attendees.

“In contrast to proteinuria, which can’t differentiate inflammation from damage, this panel for histological activity includes a set of 12 proteins linked to intrarenal inflammation,” said Fava, director of Lupus Translational Research at Johns Hopkins. A decline in the biomarker score at 3 months predicted a clinical response at 1 year, and persistent elevation of the score at 1 year predicted permanent loss of kidney function, “which makes it tempting as a treatment endpoint,” Fava said. “Upon further validation, this biomarker panel could aid in the diagnosis of lupus nephritis and guide treatment decisions.” 

Alfred Kim, MD, PhD, an associate professor of medicine at Washington University in St. Louis, was not involved in the research but noted the potential value of a reliable biomarker panel.

“If we have urinary biomarkers that strongly associate with histologic activity, this would be a game changer in the management of LN,” Kim told Medscape Medical News. “Right now, the gold standard is to perform another kidney biopsy to determine if therapy is working. But this is invasive, and many patients do not want to do another kidney biopsy. Conversely, the easiest way to assess lupus nephritis activity is through a urinalysis, focusing on urinary protein levels,” but relying on proteinuria has limitations as well.

“The most important [limitation] is that proteinuria cannot distinguish treatable inflammation from chronic damage,” Fava said. Persistent histologic activity in patients without proteinuria predicts flares, but tracking histologic activity, as Kim noted, requires repeat biopsies.

“So we need better biomarkers because biomarkers that can reflect tissue biology in real time can guide personalized treatment, and that’s one of the main goals of the Accelerating Medicines Partnership [AMP],” he said. The AMP is a public-private partnership between the National Institutes of Health (NIH), the US Food and Drug Administration (FDA), multiple biopharmaceutical and life science companies, and nonprofit and other organizations. Lupus is one of the AMP’s funded projects.

Kim agreed that “effective biomarkers are a huge unmet need in LN.” Further, he said, “imagine a world where the diagnosis of LN can be made just through urinary biomarkers and obviate the need for biopsy. Both patients and providers will be ecstatic at this possibility.” 

Fava described the background for how his research team determined what biomarkers to test. They had previously enrolled 225 patients with LN undergoing a clinically indicated kidney biopsy and collected urine samples from them at baseline and at 12, 24, and 52 weeks after their biopsy.

Of the 225 patients included, 9% with only mesangial LN (class I-II), 25% with pure membranous LN (class V), 24% with mixed LN (class III or IV with or without V), 38% with proliferative LN (class III or IV), and 4% with advanced sclerosis LN (class VI). From these samples, they quantified 1200 proteins and looked at how they correlated with histologic activity.

“What was interesting was that in patients who were classified as responders after 1 year, there were many of these proteins that declined as early as 3 months, suggesting that effective immunosuppression is reducing intrarenal inflammation, and we can capture it in real time,” Fava said.

 

Biomarker Panel Predicts Histologically Active LN

So they set to determining whether they could develop a urinary biomarker for histologically active LN that could be useful in clinical decision-making. They focused on one that could detect active proliferative LN with an NIH activity index score > 2. Their 179 participants included 47.5% Black, 27.9% White, and 14.5% Asian participants, with 10.1% of other races. The predominantly female (86.6%) cohort had an average age of 37 years. Among the LN classes, about one third (34.6%) had pure proliferative disease, 17.9% had mixed proliferative, 27.9% had pure membranous, 11.7% had class I or II, and 5% had class VI. Just over half the participants (55.7%) had not responded to treatment at 12 months, whereas 25% had a complete response, and 19.3% had a partial response.

However, both the 78 participants with an NIH activity index score > 2 and the 101 with a score ≤ 2 had a median score of 3 on the NIH chronicity index. And the urine protein-to-creatinine ratio — 2.8 in the group with an NIH activity index score > 2 and 2.4 in the other group — was nearly indistinguishable between the two groups, Fava said.

They then trained multiple algorithms on 80% of the data to find the best performing set of proteins (with an area under the curve [AUC] of 90%) for predicting an NIH activity index score > 2. They reduced the number of proteins to maximize practicality and performance of the panel, Fava said, and ultimately identified a 12-protein panel that was highly predictive of an NIH activity index score > 2. Then, they validated that panel using the other 20% of the data. The training set had an AUC of 90%, and the test set was validated with an AUC of 93%.

The 12-protein panel score outperformed anti-dsDNA, C3 complement, and proteinuria, with a sensitivity of 81%, a specificity of 90%, a positive predictive value of 87%, a negative predictive value of 86%, and an accuracy of 86%. The proteins with the greatest relative importance were CD163, cathepsin S, FOLR2, and CEACAM-1.

“In contrast to proteinuria, these proteins were related to inflammatory processes found in the kidneys in patients with lupus nephritis, such as activation of macrophages, neutrophils and monocytes, lymphocytes, and complement,” Fava said.

When they looked at the trajectories of the probabilities from the biomarker panel at 3, 6, and 12 months, the probability of the NIH activity index score remaining > 2 stayed high in the nonresponders over 1 year, but the trajectory declined at 3 months in the responders, indicating a decrease in kidney inflammation (P < .001).

 

Can the Biomarker Panel Serve as a Treatment Endpoint?

Then, to determine whether the panel could act as a reliable treatment endpoint, the researchers followed the patients for up to 7 years. One third of the patients lost more than 40% of their kidney function during the follow-up. They found that a high urinary biomarker score at 12 months predicted future glomerular filtration rate loss, independent of proteinuria.

This panel was tested specifically for proliferative LN, so “we may need distinct panels for each [LN type] to capture most of these patients,” Kim said. “I think that’s where the gold mine is: A personalized medicine approach where a large biomarker panel identifies which smaller panel that patient best fits, then use that for monitoring.”

Kim did note an important potential limitation in the study regarding how samples are used in biomarker discovery and validation vs in clinical practice. “Most samples in research studies are frozen, then thawed, while urine is assayed within a couple hours after collection in the clinical setting,” he said. “Do sample processing differences create a situation where a biomarker works in a research project but not in the clinical setting?” But more likely, he said, the opposite may be the case, where frozen samples allow for more degradation of proteins and potentially useful LN biomarker candidates are never detected.

Another challenge, Kim added, albeit unrelated to the study findings, is that diagnostic companies are finding it difficult to get payers to cover new tests, so that could become a challenge if the panel undergoes further validation and then FDA qualification.

The research was funded by Exagen. Fava reported disclosures with Arctiva, AstraZeneca, Exagen, Novartis, UCB, Bristol Myers Squibb, Annexon Bio, and Bain Capital. His coauthors reported financial relationships with numerous pharmaceutical and life science companies, including Exagen, and some are employees of Exagen.

Kim reported research agreements with AstraZeneca, Bristol Myers Squibb, Novartis, and CRISPR Therapeutics; receiving royalties from Kypha; and receiving consulting/speaking fees from AbbVie, Amgen, Atara Bio, Aurinia, Cargo Tx, Exagen, GlaxoSmithKline, Hinge Bio, Kypha, and UpToDate.

 

A version of this article appeared on Medscape.com.

WASHINGTON — An investigational 12-protein panel of urinary biomarkers predicted histologically active lupus nephritis (LN) with 86% accuracy, according to research presented at the American College of Rheumatology (ACR) 2024 Annual Meeting.

The noninvasive biomarker panel “robustly predicts meaningful and actionable histological findings” in patients with active proliferative LN, Andrea Fava, MD, assistant professor of medicine in the Division of Rheumatology at Johns Hopkins Medicine in Baltimore, told attendees.

“In contrast to proteinuria, which can’t differentiate inflammation from damage, this panel for histological activity includes a set of 12 proteins linked to intrarenal inflammation,” said Fava, director of Lupus Translational Research at Johns Hopkins. A decline in the biomarker score at 3 months predicted a clinical response at 1 year, and persistent elevation of the score at 1 year predicted permanent loss of kidney function, “which makes it tempting as a treatment endpoint,” Fava said. “Upon further validation, this biomarker panel could aid in the diagnosis of lupus nephritis and guide treatment decisions.” 

Alfred Kim, MD, PhD, an associate professor of medicine at Washington University in St. Louis, was not involved in the research but noted the potential value of a reliable biomarker panel.

“If we have urinary biomarkers that strongly associate with histologic activity, this would be a game changer in the management of LN,” Kim told Medscape Medical News. “Right now, the gold standard is to perform another kidney biopsy to determine if therapy is working. But this is invasive, and many patients do not want to do another kidney biopsy. Conversely, the easiest way to assess lupus nephritis activity is through a urinalysis, focusing on urinary protein levels,” but relying on proteinuria has limitations as well.

“The most important [limitation] is that proteinuria cannot distinguish treatable inflammation from chronic damage,” Fava said. Persistent histologic activity in patients without proteinuria predicts flares, but tracking histologic activity, as Kim noted, requires repeat biopsies.

“So we need better biomarkers because biomarkers that can reflect tissue biology in real time can guide personalized treatment, and that’s one of the main goals of the Accelerating Medicines Partnership [AMP],” he said. The AMP is a public-private partnership between the National Institutes of Health (NIH), the US Food and Drug Administration (FDA), multiple biopharmaceutical and life science companies, and nonprofit and other organizations. Lupus is one of the AMP’s funded projects.

Kim agreed that “effective biomarkers are a huge unmet need in LN.” Further, he said, “imagine a world where the diagnosis of LN can be made just through urinary biomarkers and obviate the need for biopsy. Both patients and providers will be ecstatic at this possibility.” 

Fava described the background for how his research team determined what biomarkers to test. They had previously enrolled 225 patients with LN undergoing a clinically indicated kidney biopsy and collected urine samples from them at baseline and at 12, 24, and 52 weeks after their biopsy.

Of the 225 patients included, 9% with only mesangial LN (class I-II), 25% with pure membranous LN (class V), 24% with mixed LN (class III or IV with or without V), 38% with proliferative LN (class III or IV), and 4% with advanced sclerosis LN (class VI). From these samples, they quantified 1200 proteins and looked at how they correlated with histologic activity.

“What was interesting was that in patients who were classified as responders after 1 year, there were many of these proteins that declined as early as 3 months, suggesting that effective immunosuppression is reducing intrarenal inflammation, and we can capture it in real time,” Fava said.

 

Biomarker Panel Predicts Histologically Active LN

So they set to determining whether they could develop a urinary biomarker for histologically active LN that could be useful in clinical decision-making. They focused on one that could detect active proliferative LN with an NIH activity index score > 2. Their 179 participants included 47.5% Black, 27.9% White, and 14.5% Asian participants, with 10.1% of other races. The predominantly female (86.6%) cohort had an average age of 37 years. Among the LN classes, about one third (34.6%) had pure proliferative disease, 17.9% had mixed proliferative, 27.9% had pure membranous, 11.7% had class I or II, and 5% had class VI. Just over half the participants (55.7%) had not responded to treatment at 12 months, whereas 25% had a complete response, and 19.3% had a partial response.

However, both the 78 participants with an NIH activity index score > 2 and the 101 with a score ≤ 2 had a median score of 3 on the NIH chronicity index. And the urine protein-to-creatinine ratio — 2.8 in the group with an NIH activity index score > 2 and 2.4 in the other group — was nearly indistinguishable between the two groups, Fava said.

They then trained multiple algorithms on 80% of the data to find the best performing set of proteins (with an area under the curve [AUC] of 90%) for predicting an NIH activity index score > 2. They reduced the number of proteins to maximize practicality and performance of the panel, Fava said, and ultimately identified a 12-protein panel that was highly predictive of an NIH activity index score > 2. Then, they validated that panel using the other 20% of the data. The training set had an AUC of 90%, and the test set was validated with an AUC of 93%.

The 12-protein panel score outperformed anti-dsDNA, C3 complement, and proteinuria, with a sensitivity of 81%, a specificity of 90%, a positive predictive value of 87%, a negative predictive value of 86%, and an accuracy of 86%. The proteins with the greatest relative importance were CD163, cathepsin S, FOLR2, and CEACAM-1.

“In contrast to proteinuria, these proteins were related to inflammatory processes found in the kidneys in patients with lupus nephritis, such as activation of macrophages, neutrophils and monocytes, lymphocytes, and complement,” Fava said.

When they looked at the trajectories of the probabilities from the biomarker panel at 3, 6, and 12 months, the probability of the NIH activity index score remaining > 2 stayed high in the nonresponders over 1 year, but the trajectory declined at 3 months in the responders, indicating a decrease in kidney inflammation (P < .001).

 

Can the Biomarker Panel Serve as a Treatment Endpoint?

Then, to determine whether the panel could act as a reliable treatment endpoint, the researchers followed the patients for up to 7 years. One third of the patients lost more than 40% of their kidney function during the follow-up. They found that a high urinary biomarker score at 12 months predicted future glomerular filtration rate loss, independent of proteinuria.

This panel was tested specifically for proliferative LN, so “we may need distinct panels for each [LN type] to capture most of these patients,” Kim said. “I think that’s where the gold mine is: A personalized medicine approach where a large biomarker panel identifies which smaller panel that patient best fits, then use that for monitoring.”

Kim did note an important potential limitation in the study regarding how samples are used in biomarker discovery and validation vs in clinical practice. “Most samples in research studies are frozen, then thawed, while urine is assayed within a couple hours after collection in the clinical setting,” he said. “Do sample processing differences create a situation where a biomarker works in a research project but not in the clinical setting?” But more likely, he said, the opposite may be the case, where frozen samples allow for more degradation of proteins and potentially useful LN biomarker candidates are never detected.

Another challenge, Kim added, albeit unrelated to the study findings, is that diagnostic companies are finding it difficult to get payers to cover new tests, so that could become a challenge if the panel undergoes further validation and then FDA qualification.

The research was funded by Exagen. Fava reported disclosures with Arctiva, AstraZeneca, Exagen, Novartis, UCB, Bristol Myers Squibb, Annexon Bio, and Bain Capital. His coauthors reported financial relationships with numerous pharmaceutical and life science companies, including Exagen, and some are employees of Exagen.

Kim reported research agreements with AstraZeneca, Bristol Myers Squibb, Novartis, and CRISPR Therapeutics; receiving royalties from Kypha; and receiving consulting/speaking fees from AbbVie, Amgen, Atara Bio, Aurinia, Cargo Tx, Exagen, GlaxoSmithKline, Hinge Bio, Kypha, and UpToDate.

 

A version of this article appeared on Medscape.com.

WASHINGTON — An investigational 12-protein panel of urinary biomarkers predicted histologically active lupus nephritis (LN) with 86% accuracy, according to research presented at the American College of Rheumatology (ACR) 2024 Annual Meeting.

The noninvasive biomarker panel “robustly predicts meaningful and actionable histological findings” in patients with active proliferative LN, Andrea Fava, MD, assistant professor of medicine in the Division of Rheumatology at Johns Hopkins Medicine in Baltimore, told attendees.

“In contrast to proteinuria, which can’t differentiate inflammation from damage, this panel for histological activity includes a set of 12 proteins linked to intrarenal inflammation,” said Fava, director of Lupus Translational Research at Johns Hopkins. A decline in the biomarker score at 3 months predicted a clinical response at 1 year, and persistent elevation of the score at 1 year predicted permanent loss of kidney function, “which makes it tempting as a treatment endpoint,” Fava said. “Upon further validation, this biomarker panel could aid in the diagnosis of lupus nephritis and guide treatment decisions.” 

Alfred Kim, MD, PhD, an associate professor of medicine at Washington University in St. Louis, was not involved in the research but noted the potential value of a reliable biomarker panel.

“If we have urinary biomarkers that strongly associate with histologic activity, this would be a game changer in the management of LN,” Kim told Medscape Medical News. “Right now, the gold standard is to perform another kidney biopsy to determine if therapy is working. But this is invasive, and many patients do not want to do another kidney biopsy. Conversely, the easiest way to assess lupus nephritis activity is through a urinalysis, focusing on urinary protein levels,” but relying on proteinuria has limitations as well.

“The most important [limitation] is that proteinuria cannot distinguish treatable inflammation from chronic damage,” Fava said. Persistent histologic activity in patients without proteinuria predicts flares, but tracking histologic activity, as Kim noted, requires repeat biopsies.

“So we need better biomarkers because biomarkers that can reflect tissue biology in real time can guide personalized treatment, and that’s one of the main goals of the Accelerating Medicines Partnership [AMP],” he said. The AMP is a public-private partnership between the National Institutes of Health (NIH), the US Food and Drug Administration (FDA), multiple biopharmaceutical and life science companies, and nonprofit and other organizations. Lupus is one of the AMP’s funded projects.

Kim agreed that “effective biomarkers are a huge unmet need in LN.” Further, he said, “imagine a world where the diagnosis of LN can be made just through urinary biomarkers and obviate the need for biopsy. Both patients and providers will be ecstatic at this possibility.” 

Fava described the background for how his research team determined what biomarkers to test. They had previously enrolled 225 patients with LN undergoing a clinically indicated kidney biopsy and collected urine samples from them at baseline and at 12, 24, and 52 weeks after their biopsy.

Of the 225 patients included, 9% with only mesangial LN (class I-II), 25% with pure membranous LN (class V), 24% with mixed LN (class III or IV with or without V), 38% with proliferative LN (class III or IV), and 4% with advanced sclerosis LN (class VI). From these samples, they quantified 1200 proteins and looked at how they correlated with histologic activity.

“What was interesting was that in patients who were classified as responders after 1 year, there were many of these proteins that declined as early as 3 months, suggesting that effective immunosuppression is reducing intrarenal inflammation, and we can capture it in real time,” Fava said.

 

Biomarker Panel Predicts Histologically Active LN

So they set to determining whether they could develop a urinary biomarker for histologically active LN that could be useful in clinical decision-making. They focused on one that could detect active proliferative LN with an NIH activity index score > 2. Their 179 participants included 47.5% Black, 27.9% White, and 14.5% Asian participants, with 10.1% of other races. The predominantly female (86.6%) cohort had an average age of 37 years. Among the LN classes, about one third (34.6%) had pure proliferative disease, 17.9% had mixed proliferative, 27.9% had pure membranous, 11.7% had class I or II, and 5% had class VI. Just over half the participants (55.7%) had not responded to treatment at 12 months, whereas 25% had a complete response, and 19.3% had a partial response.

However, both the 78 participants with an NIH activity index score > 2 and the 101 with a score ≤ 2 had a median score of 3 on the NIH chronicity index. And the urine protein-to-creatinine ratio — 2.8 in the group with an NIH activity index score > 2 and 2.4 in the other group — was nearly indistinguishable between the two groups, Fava said.

They then trained multiple algorithms on 80% of the data to find the best performing set of proteins (with an area under the curve [AUC] of 90%) for predicting an NIH activity index score > 2. They reduced the number of proteins to maximize practicality and performance of the panel, Fava said, and ultimately identified a 12-protein panel that was highly predictive of an NIH activity index score > 2. Then, they validated that panel using the other 20% of the data. The training set had an AUC of 90%, and the test set was validated with an AUC of 93%.

The 12-protein panel score outperformed anti-dsDNA, C3 complement, and proteinuria, with a sensitivity of 81%, a specificity of 90%, a positive predictive value of 87%, a negative predictive value of 86%, and an accuracy of 86%. The proteins with the greatest relative importance were CD163, cathepsin S, FOLR2, and CEACAM-1.

“In contrast to proteinuria, these proteins were related to inflammatory processes found in the kidneys in patients with lupus nephritis, such as activation of macrophages, neutrophils and monocytes, lymphocytes, and complement,” Fava said.

When they looked at the trajectories of the probabilities from the biomarker panel at 3, 6, and 12 months, the probability of the NIH activity index score remaining > 2 stayed high in the nonresponders over 1 year, but the trajectory declined at 3 months in the responders, indicating a decrease in kidney inflammation (P < .001).

 

Can the Biomarker Panel Serve as a Treatment Endpoint?

Then, to determine whether the panel could act as a reliable treatment endpoint, the researchers followed the patients for up to 7 years. One third of the patients lost more than 40% of their kidney function during the follow-up. They found that a high urinary biomarker score at 12 months predicted future glomerular filtration rate loss, independent of proteinuria.

This panel was tested specifically for proliferative LN, so “we may need distinct panels for each [LN type] to capture most of these patients,” Kim said. “I think that’s where the gold mine is: A personalized medicine approach where a large biomarker panel identifies which smaller panel that patient best fits, then use that for monitoring.”

Kim did note an important potential limitation in the study regarding how samples are used in biomarker discovery and validation vs in clinical practice. “Most samples in research studies are frozen, then thawed, while urine is assayed within a couple hours after collection in the clinical setting,” he said. “Do sample processing differences create a situation where a biomarker works in a research project but not in the clinical setting?” But more likely, he said, the opposite may be the case, where frozen samples allow for more degradation of proteins and potentially useful LN biomarker candidates are never detected.

Another challenge, Kim added, albeit unrelated to the study findings, is that diagnostic companies are finding it difficult to get payers to cover new tests, so that could become a challenge if the panel undergoes further validation and then FDA qualification.

The research was funded by Exagen. Fava reported disclosures with Arctiva, AstraZeneca, Exagen, Novartis, UCB, Bristol Myers Squibb, Annexon Bio, and Bain Capital. His coauthors reported financial relationships with numerous pharmaceutical and life science companies, including Exagen, and some are employees of Exagen.

Kim reported research agreements with AstraZeneca, Bristol Myers Squibb, Novartis, and CRISPR Therapeutics; receiving royalties from Kypha; and receiving consulting/speaking fees from AbbVie, Amgen, Atara Bio, Aurinia, Cargo Tx, Exagen, GlaxoSmithKline, Hinge Bio, Kypha, and UpToDate.

 

A version of this article appeared on Medscape.com.