Take steps to relieve ataxia in patients with alcohol use disorder

Article Type
Changed
Tue, 12/11/2018 - 15:17
Display Headline
Take steps to relieve ataxia in patients with alcohol use disorder

Ataxia is a well-known complication of chronic alcohol abuse, which is attributed to degeneration of the cerebellar vermis. However, effective treatment approaches, as well as the timing and level of recovery, remain unclear. One cross-sectional study found that long-term abstainers from alcohol had less severe ataxia than short-term abstainers,1 suggesting that improvement is possible with continued sobriety. However, a recent longitudinal study contradicts this finding, reporting no improvement in ataxia in patients abstinent for 10 weeks to 1 year.2

CASE REPORT
Unable to walk, heavy alcohol use

Mr. G, a 59-year-old white male with a history of daily, heavy alcohol use, presents to the emergency room reporting that he has “not been able to walk right” for 3 weeks. He is in a wheelchair because of ataxia and difficulty balancing. He denies headaches, visual changes, weakness, numbness, and difficulty speaking or swallowing.

Mr. G reports drinking one 40-oz bottle of malt liquor and 2 pints of vodka per day for more than 40 years. His alcohol abuse led to homelessness, unemployment, and divorce. Despite heavy drinking, he denies signs of withdrawal, including shaking, sweating, seizures, and delirium.

Mr. G has no other medical conditions. He denies a family history of neurologic disorders or substance abuse.

His pulse is 100 beats per minute, respirations of 16 breaths per minute, temperature of 37°C, and blood pressure of 143/89 mm Hg. Physical examination reveals a wide-based gait.

Mr. G is admitted to the inpatient psychiatric unit to monitor and treat his alcohol withdrawal and to undergo further workup of the gait disturbance.

A head CT scan shows non-specific changes; an EEG also is within normal limits. Complete blood count, basic metabolic panel, liver function test, HIV test, acute hepatitis panel, thyroid function test, erythrocyte sedimentation rate, and vitamin B12 tests are within normal ranges.

A full neurologic exam reveals a wide-based gait, impaired heel-shin test, and dysmetria on finger-nose-finger test. Mr. G is given a diagnosis of ataxia due to alcoholic cerebellar degeneration. Thiamine repletion is suggested.

Treatment and outcome

Mr. G continues on thiamine, 100 mg, twice daily, and oxazepam, 15 mg, as needed, to manage withdrawal symptoms. He receives gait training 3 times per week.

Approximately 10 days after admission, Mr. G is able to ambulate with a walker. Three weeks after admission, his gait has improved and he walks with a cane. (See the video at CurrentPsychiatry.com for an illustration of this progressive recovery.)

After discharge, Mr. G is referred to an addiction psychiatrist and addiction psychotherapist for ongoing treatment of alcohol use disorder.

Making the diagnosis

In a patient complaining of balance difficulties, consider ataxia secondary to cerebellar degeneration.

  • Take a complete history. Ask about the onset and progression of ataxia.
  • Obtain a family history. Some types of ataxia are genetic.
  • Perform a neurologic examination, which may reveal signs of cerebellar deficits, particularly characteristic wide-based gait. These patients will have difficulty when walking in tandem. Other impairments on the neurologic exam that may raise suspicion for a cerebellar disorder include: impaired heel-shin test, impaired finger-nose-finger test (dysmetria), impaired rapid alternating movements (dysdiadochokinesia), nystagmus, impaired smooth pursuits, intention tremor, or speech abnormalities.
  • Perform head imaging, such as a CT scan or MRI. In patients with ataxia secondary to alcohol abuse, imaging might reveal degeneration of the cerebellar vermis.
  • Perform laboratory tests, such as inflammatory markers, vitamin levels, and thyroid function testing to detect possible toxic-metabolic or inflammatory causes.

Alcohol-induced ataxia can be diagnosed in patients with a history of heavy drinking if the workup does not reveal another possible cause for the gait disturbance. Other less common deficits associated with alcohol-induced cerebellar injury include:

  • dysarthria
  • abnormal rate and force of movement
  • limb ataxia.3

Recommendations

  • Be able to recognize the characteristic gait of patients with alcohol-induced ataxia.
  • Provide thiamine supplementation.
  • Refer patients to physical therapy.
  • Educate your patients that their gait will not improve and may worsen if they continue to drink.
  • Refer patients for ongoing treatment for alcohol use disorder, including medication management and psychotherapy.

Our experience suggests that patients with alcohol use disorder with cerebellar ataxia could have a good prognosis for ambulation. Improvement could occur over several weeks; it is unclear whether further gains can be expected with months or years of abstinence.

References

1. Smith S, Fein G. Persistent but less severe ataxia in long-term versus short-term abstinent alcoholic men and women: a cross-sectional analysis. Alcohol Clin Exp Res. 2011;35(12):2184-2192.
2. Fein G, Greenstein D. Gait and balance deficits in chronic alcoholics: no improvement from 10 weeks through 1 year abstinence. Alcohol Clin Exp Res. 2013;37(1):86-95.
3. Fitzpatrick LE, Jackson M, Crowe SF. Characterization of cerebellar ataxia in chronic alcoholics using the International Cooperative Ataxia Rating Scale (ICARS). Alcohol Clin Exp Res. 2012;36(11):1942-1951.

Article PDF
Author and Disclosure Information

Dr. Lache is an Addiction Psychiatrist at the Veterans Affairs Medical Center, Wilmington, Delaware. Dr. Dhopesh is a Clinical Associate Professor of Psychiatry, University of Pennsylvania, and Addiction Psychiatrist and Clinical Associate Professor of Psychiatry at the Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania.

Disclosures

The authors report no financial relationships with any company whose products are mentioned in this article or manufacturers of competing products.

Issue
Current Psychiatry - 15(10)
Publications
Topics
Page Number
e1-e2
Sections
Author and Disclosure Information

Dr. Lache is an Addiction Psychiatrist at the Veterans Affairs Medical Center, Wilmington, Delaware. Dr. Dhopesh is a Clinical Associate Professor of Psychiatry, University of Pennsylvania, and Addiction Psychiatrist and Clinical Associate Professor of Psychiatry at the Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania.

Disclosures

The authors report no financial relationships with any company whose products are mentioned in this article or manufacturers of competing products.

Author and Disclosure Information

Dr. Lache is an Addiction Psychiatrist at the Veterans Affairs Medical Center, Wilmington, Delaware. Dr. Dhopesh is a Clinical Associate Professor of Psychiatry, University of Pennsylvania, and Addiction Psychiatrist and Clinical Associate Professor of Psychiatry at the Corporal Michael J. Crescenz Veterans Affairs Medical Center, Philadelphia, Pennsylvania.

Disclosures

The authors report no financial relationships with any company whose products are mentioned in this article or manufacturers of competing products.

Article PDF
Article PDF

Ataxia is a well-known complication of chronic alcohol abuse, which is attributed to degeneration of the cerebellar vermis. However, effective treatment approaches, as well as the timing and level of recovery, remain unclear. One cross-sectional study found that long-term abstainers from alcohol had less severe ataxia than short-term abstainers,1 suggesting that improvement is possible with continued sobriety. However, a recent longitudinal study contradicts this finding, reporting no improvement in ataxia in patients abstinent for 10 weeks to 1 year.2

CASE REPORT
Unable to walk, heavy alcohol use

Mr. G, a 59-year-old white male with a history of daily, heavy alcohol use, presents to the emergency room reporting that he has “not been able to walk right” for 3 weeks. He is in a wheelchair because of ataxia and difficulty balancing. He denies headaches, visual changes, weakness, numbness, and difficulty speaking or swallowing.

Mr. G reports drinking one 40-oz bottle of malt liquor and 2 pints of vodka per day for more than 40 years. His alcohol abuse led to homelessness, unemployment, and divorce. Despite heavy drinking, he denies signs of withdrawal, including shaking, sweating, seizures, and delirium.

Mr. G has no other medical conditions. He denies a family history of neurologic disorders or substance abuse.

His pulse is 100 beats per minute, respirations of 16 breaths per minute, temperature of 37°C, and blood pressure of 143/89 mm Hg. Physical examination reveals a wide-based gait.

Mr. G is admitted to the inpatient psychiatric unit to monitor and treat his alcohol withdrawal and to undergo further workup of the gait disturbance.

A head CT scan shows non-specific changes; an EEG also is within normal limits. Complete blood count, basic metabolic panel, liver function test, HIV test, acute hepatitis panel, thyroid function test, erythrocyte sedimentation rate, and vitamin B12 tests are within normal ranges.

A full neurologic exam reveals a wide-based gait, impaired heel-shin test, and dysmetria on finger-nose-finger test. Mr. G is given a diagnosis of ataxia due to alcoholic cerebellar degeneration. Thiamine repletion is suggested.

Treatment and outcome

Mr. G continues on thiamine, 100 mg, twice daily, and oxazepam, 15 mg, as needed, to manage withdrawal symptoms. He receives gait training 3 times per week.

Approximately 10 days after admission, Mr. G is able to ambulate with a walker. Three weeks after admission, his gait has improved and he walks with a cane. (See the video at CurrentPsychiatry.com for an illustration of this progressive recovery.)

After discharge, Mr. G is referred to an addiction psychiatrist and addiction psychotherapist for ongoing treatment of alcohol use disorder.

Making the diagnosis

In a patient complaining of balance difficulties, consider ataxia secondary to cerebellar degeneration.

  • Take a complete history. Ask about the onset and progression of ataxia.
  • Obtain a family history. Some types of ataxia are genetic.
  • Perform a neurologic examination, which may reveal signs of cerebellar deficits, particularly characteristic wide-based gait. These patients will have difficulty when walking in tandem. Other impairments on the neurologic exam that may raise suspicion for a cerebellar disorder include: impaired heel-shin test, impaired finger-nose-finger test (dysmetria), impaired rapid alternating movements (dysdiadochokinesia), nystagmus, impaired smooth pursuits, intention tremor, or speech abnormalities.
  • Perform head imaging, such as a CT scan or MRI. In patients with ataxia secondary to alcohol abuse, imaging might reveal degeneration of the cerebellar vermis.
  • Perform laboratory tests, such as inflammatory markers, vitamin levels, and thyroid function testing to detect possible toxic-metabolic or inflammatory causes.

Alcohol-induced ataxia can be diagnosed in patients with a history of heavy drinking if the workup does not reveal another possible cause for the gait disturbance. Other less common deficits associated with alcohol-induced cerebellar injury include:

  • dysarthria
  • abnormal rate and force of movement
  • limb ataxia.3

Recommendations

  • Be able to recognize the characteristic gait of patients with alcohol-induced ataxia.
  • Provide thiamine supplementation.
  • Refer patients to physical therapy.
  • Educate your patients that their gait will not improve and may worsen if they continue to drink.
  • Refer patients for ongoing treatment for alcohol use disorder, including medication management and psychotherapy.

Our experience suggests that patients with alcohol use disorder with cerebellar ataxia could have a good prognosis for ambulation. Improvement could occur over several weeks; it is unclear whether further gains can be expected with months or years of abstinence.

Ataxia is a well-known complication of chronic alcohol abuse, which is attributed to degeneration of the cerebellar vermis. However, effective treatment approaches, as well as the timing and level of recovery, remain unclear. One cross-sectional study found that long-term abstainers from alcohol had less severe ataxia than short-term abstainers,1 suggesting that improvement is possible with continued sobriety. However, a recent longitudinal study contradicts this finding, reporting no improvement in ataxia in patients abstinent for 10 weeks to 1 year.2

CASE REPORT
Unable to walk, heavy alcohol use

Mr. G, a 59-year-old white male with a history of daily, heavy alcohol use, presents to the emergency room reporting that he has “not been able to walk right” for 3 weeks. He is in a wheelchair because of ataxia and difficulty balancing. He denies headaches, visual changes, weakness, numbness, and difficulty speaking or swallowing.

Mr. G reports drinking one 40-oz bottle of malt liquor and 2 pints of vodka per day for more than 40 years. His alcohol abuse led to homelessness, unemployment, and divorce. Despite heavy drinking, he denies signs of withdrawal, including shaking, sweating, seizures, and delirium.

Mr. G has no other medical conditions. He denies a family history of neurologic disorders or substance abuse.

His pulse is 100 beats per minute, respirations of 16 breaths per minute, temperature of 37°C, and blood pressure of 143/89 mm Hg. Physical examination reveals a wide-based gait.

Mr. G is admitted to the inpatient psychiatric unit to monitor and treat his alcohol withdrawal and to undergo further workup of the gait disturbance.

A head CT scan shows non-specific changes; an EEG also is within normal limits. Complete blood count, basic metabolic panel, liver function test, HIV test, acute hepatitis panel, thyroid function test, erythrocyte sedimentation rate, and vitamin B12 tests are within normal ranges.

A full neurologic exam reveals a wide-based gait, impaired heel-shin test, and dysmetria on finger-nose-finger test. Mr. G is given a diagnosis of ataxia due to alcoholic cerebellar degeneration. Thiamine repletion is suggested.

Treatment and outcome

Mr. G continues on thiamine, 100 mg, twice daily, and oxazepam, 15 mg, as needed, to manage withdrawal symptoms. He receives gait training 3 times per week.

Approximately 10 days after admission, Mr. G is able to ambulate with a walker. Three weeks after admission, his gait has improved and he walks with a cane. (See the video at CurrentPsychiatry.com for an illustration of this progressive recovery.)

After discharge, Mr. G is referred to an addiction psychiatrist and addiction psychotherapist for ongoing treatment of alcohol use disorder.

Making the diagnosis

In a patient complaining of balance difficulties, consider ataxia secondary to cerebellar degeneration.

  • Take a complete history. Ask about the onset and progression of ataxia.
  • Obtain a family history. Some types of ataxia are genetic.
  • Perform a neurologic examination, which may reveal signs of cerebellar deficits, particularly characteristic wide-based gait. These patients will have difficulty when walking in tandem. Other impairments on the neurologic exam that may raise suspicion for a cerebellar disorder include: impaired heel-shin test, impaired finger-nose-finger test (dysmetria), impaired rapid alternating movements (dysdiadochokinesia), nystagmus, impaired smooth pursuits, intention tremor, or speech abnormalities.
  • Perform head imaging, such as a CT scan or MRI. In patients with ataxia secondary to alcohol abuse, imaging might reveal degeneration of the cerebellar vermis.
  • Perform laboratory tests, such as inflammatory markers, vitamin levels, and thyroid function testing to detect possible toxic-metabolic or inflammatory causes.

Alcohol-induced ataxia can be diagnosed in patients with a history of heavy drinking if the workup does not reveal another possible cause for the gait disturbance. Other less common deficits associated with alcohol-induced cerebellar injury include:

  • dysarthria
  • abnormal rate and force of movement
  • limb ataxia.3

Recommendations

  • Be able to recognize the characteristic gait of patients with alcohol-induced ataxia.
  • Provide thiamine supplementation.
  • Refer patients to physical therapy.
  • Educate your patients that their gait will not improve and may worsen if they continue to drink.
  • Refer patients for ongoing treatment for alcohol use disorder, including medication management and psychotherapy.

Our experience suggests that patients with alcohol use disorder with cerebellar ataxia could have a good prognosis for ambulation. Improvement could occur over several weeks; it is unclear whether further gains can be expected with months or years of abstinence.

References

1. Smith S, Fein G. Persistent but less severe ataxia in long-term versus short-term abstinent alcoholic men and women: a cross-sectional analysis. Alcohol Clin Exp Res. 2011;35(12):2184-2192.
2. Fein G, Greenstein D. Gait and balance deficits in chronic alcoholics: no improvement from 10 weeks through 1 year abstinence. Alcohol Clin Exp Res. 2013;37(1):86-95.
3. Fitzpatrick LE, Jackson M, Crowe SF. Characterization of cerebellar ataxia in chronic alcoholics using the International Cooperative Ataxia Rating Scale (ICARS). Alcohol Clin Exp Res. 2012;36(11):1942-1951.

References

1. Smith S, Fein G. Persistent but less severe ataxia in long-term versus short-term abstinent alcoholic men and women: a cross-sectional analysis. Alcohol Clin Exp Res. 2011;35(12):2184-2192.
2. Fein G, Greenstein D. Gait and balance deficits in chronic alcoholics: no improvement from 10 weeks through 1 year abstinence. Alcohol Clin Exp Res. 2013;37(1):86-95.
3. Fitzpatrick LE, Jackson M, Crowe SF. Characterization of cerebellar ataxia in chronic alcoholics using the International Cooperative Ataxia Rating Scale (ICARS). Alcohol Clin Exp Res. 2012;36(11):1942-1951.

Issue
Current Psychiatry - 15(10)
Issue
Current Psychiatry - 15(10)
Page Number
e1-e2
Page Number
e1-e2
Publications
Publications
Topics
Article Type
Display Headline
Take steps to relieve ataxia in patients with alcohol use disorder
Display Headline
Take steps to relieve ataxia in patients with alcohol use disorder
Sections
Disallow All Ads
Article PDF Media

No more 'stickies'!: Help your patients bring their ‘to-do’ list into the 21st century

Article Type
Changed
Tue, 12/11/2018 - 15:17

Difficulty with time management and organization is one of the most common complaints of patients with attention-deficit/hyperactivity disorder (ADHD). Being unproductive and inefficient also is anxiety-producing and depressing, leaving patients with additional comorbidity.

Although medication can help improve a person’s focus, if the patient is focusing on a set of poorly designed systems, he (she) will see little improvement. A comprehensive approach to improving day-to-day task management, similar to the one I describe here and use with my patients, is therefore as important as medication.

Needed: An ‘organizing principle’

Imagine that supermarkets displayed food in the order it arrives from the food distributors and producers. You’d walk in to the store and see a display of food that lacks hierarchy—1 random item placed next to another. The experience would be jarring, and shopping would be a much slower chore. Furthermore, what if you had to go to 5 stores to cover all your needs?

Yet, that is how most “to-do” lists are executed: A thought comes in, a thought goes down on paper. Or on a sticky note. Or in an app. Or in a calendar. Or all of the above! Often, there is neither an organizing principle (other than perhaps chronological order) or a central repository. No wonder it’s hard to feel present and clear-minded. Add to this disorganization the volume of information coming in from the environment—e-mails, voice mails, texts, notifications, dings, beeps, buzzes, and maybe even snail mail—and the feeling of being overwhelmed grows.

Unconscious motives for maintaining poor systems also might play a role. People with a “need to please” personality type or who are more passive-aggressive in their communication are more likely to overcommit, and then forget or be late completing their tasks, rather than saying “No” from the outset or delegating the work. 

Survival basics for time management

Assuming there is simply a skills deficit, you can teach basic time and project management skills to patients with ADHD (and to any patient with suboptimal executive functioning). Here are basic principles to adopt:

  • If you can forget it, you will, so all tasks should go onto the to-do list.
  • You should keep only 1 list. Adding on “stickies” is not allowed.
  • Your list is like an extra lobe of your brain: It should be present at all times, whether you keep it in “the Cloud,” on your desktop, or on paper.
  • Review your list and clean it up at least daily. This takes time, but it also saves time—in spades—when you can call upon the right task, at the right time, with energy and drive.
  • The first action you should take in the daily review is to weed out or delegate tasks.
  • Next, categorize remaining tasks. (Note: The free smartphone app Evernote allows you to do this with “tags.”) Categorizing allows you to process sets of tasks in buckets that can be tackled as a bundle and, therefore, more efficiently. For example, having all of your errands, items to research, and telephone calls that need to be returned in separate buckets allows for speedier processing—as opposed to veering back and forth between line items.
  • Then, move remaining high-priority items to the top of the list. However, remember that, if everything is urgent, nothing is. Items that are low-hanging fruit that you can cross off the list in a matter of minutes can be prioritized even if they are not as urgent. By doing that, your list becomes more manageable and your brain can dive deeper into more complex tasks.
  • Block out calendar time for each of your buckets with this formula: (1) Estimate how much time you’ll need to complete the tasks in each bucket, then add 50% for each bucket. (2) Add in commuting, set-up, or wind-down time, if you need it, to the grand total for all buckets, and then add 50% more than you’ve estimated

Set the brain free!

This process will seem like a burden at the beginning, when the synapses underneath it still need to get stronger (much like how the body responds to exercise). However, as long as these principles are put into action daily, they will become a trusted, second-nature system that frees the brain from distraction and anxiety—and, ultimately, for being more creative and mindful.

 

 

Article PDF
Author and Disclosure Information

Dr. Braslow is in private psychiatric practice in San Francisco and Berkeley, California. He is the founder of Luminello.com, an electronic medical record and practice management platform.

Disclosure

Dr. Braslow is the founder of Luminello.com.

Issue
Current Psychiatry - 15(10)
Publications
Topics
Page Number
e1-e2
Sections
Author and Disclosure Information

Dr. Braslow is in private psychiatric practice in San Francisco and Berkeley, California. He is the founder of Luminello.com, an electronic medical record and practice management platform.

Disclosure

Dr. Braslow is the founder of Luminello.com.

Author and Disclosure Information

Dr. Braslow is in private psychiatric practice in San Francisco and Berkeley, California. He is the founder of Luminello.com, an electronic medical record and practice management platform.

Disclosure

Dr. Braslow is the founder of Luminello.com.

Article PDF
Article PDF

Difficulty with time management and organization is one of the most common complaints of patients with attention-deficit/hyperactivity disorder (ADHD). Being unproductive and inefficient also is anxiety-producing and depressing, leaving patients with additional comorbidity.

Although medication can help improve a person’s focus, if the patient is focusing on a set of poorly designed systems, he (she) will see little improvement. A comprehensive approach to improving day-to-day task management, similar to the one I describe here and use with my patients, is therefore as important as medication.

Needed: An ‘organizing principle’

Imagine that supermarkets displayed food in the order it arrives from the food distributors and producers. You’d walk in to the store and see a display of food that lacks hierarchy—1 random item placed next to another. The experience would be jarring, and shopping would be a much slower chore. Furthermore, what if you had to go to 5 stores to cover all your needs?

Yet, that is how most “to-do” lists are executed: A thought comes in, a thought goes down on paper. Or on a sticky note. Or in an app. Or in a calendar. Or all of the above! Often, there is neither an organizing principle (other than perhaps chronological order) or a central repository. No wonder it’s hard to feel present and clear-minded. Add to this disorganization the volume of information coming in from the environment—e-mails, voice mails, texts, notifications, dings, beeps, buzzes, and maybe even snail mail—and the feeling of being overwhelmed grows.

Unconscious motives for maintaining poor systems also might play a role. People with a “need to please” personality type or who are more passive-aggressive in their communication are more likely to overcommit, and then forget or be late completing their tasks, rather than saying “No” from the outset or delegating the work. 

Survival basics for time management

Assuming there is simply a skills deficit, you can teach basic time and project management skills to patients with ADHD (and to any patient with suboptimal executive functioning). Here are basic principles to adopt:

  • If you can forget it, you will, so all tasks should go onto the to-do list.
  • You should keep only 1 list. Adding on “stickies” is not allowed.
  • Your list is like an extra lobe of your brain: It should be present at all times, whether you keep it in “the Cloud,” on your desktop, or on paper.
  • Review your list and clean it up at least daily. This takes time, but it also saves time—in spades—when you can call upon the right task, at the right time, with energy and drive.
  • The first action you should take in the daily review is to weed out or delegate tasks.
  • Next, categorize remaining tasks. (Note: The free smartphone app Evernote allows you to do this with “tags.”) Categorizing allows you to process sets of tasks in buckets that can be tackled as a bundle and, therefore, more efficiently. For example, having all of your errands, items to research, and telephone calls that need to be returned in separate buckets allows for speedier processing—as opposed to veering back and forth between line items.
  • Then, move remaining high-priority items to the top of the list. However, remember that, if everything is urgent, nothing is. Items that are low-hanging fruit that you can cross off the list in a matter of minutes can be prioritized even if they are not as urgent. By doing that, your list becomes more manageable and your brain can dive deeper into more complex tasks.
  • Block out calendar time for each of your buckets with this formula: (1) Estimate how much time you’ll need to complete the tasks in each bucket, then add 50% for each bucket. (2) Add in commuting, set-up, or wind-down time, if you need it, to the grand total for all buckets, and then add 50% more than you’ve estimated

Set the brain free!

This process will seem like a burden at the beginning, when the synapses underneath it still need to get stronger (much like how the body responds to exercise). However, as long as these principles are put into action daily, they will become a trusted, second-nature system that frees the brain from distraction and anxiety—and, ultimately, for being more creative and mindful.

 

 

Difficulty with time management and organization is one of the most common complaints of patients with attention-deficit/hyperactivity disorder (ADHD). Being unproductive and inefficient also is anxiety-producing and depressing, leaving patients with additional comorbidity.

Although medication can help improve a person’s focus, if the patient is focusing on a set of poorly designed systems, he (she) will see little improvement. A comprehensive approach to improving day-to-day task management, similar to the one I describe here and use with my patients, is therefore as important as medication.

Needed: An ‘organizing principle’

Imagine that supermarkets displayed food in the order it arrives from the food distributors and producers. You’d walk in to the store and see a display of food that lacks hierarchy—1 random item placed next to another. The experience would be jarring, and shopping would be a much slower chore. Furthermore, what if you had to go to 5 stores to cover all your needs?

Yet, that is how most “to-do” lists are executed: A thought comes in, a thought goes down on paper. Or on a sticky note. Or in an app. Or in a calendar. Or all of the above! Often, there is neither an organizing principle (other than perhaps chronological order) or a central repository. No wonder it’s hard to feel present and clear-minded. Add to this disorganization the volume of information coming in from the environment—e-mails, voice mails, texts, notifications, dings, beeps, buzzes, and maybe even snail mail—and the feeling of being overwhelmed grows.

Unconscious motives for maintaining poor systems also might play a role. People with a “need to please” personality type or who are more passive-aggressive in their communication are more likely to overcommit, and then forget or be late completing their tasks, rather than saying “No” from the outset or delegating the work. 

Survival basics for time management

Assuming there is simply a skills deficit, you can teach basic time and project management skills to patients with ADHD (and to any patient with suboptimal executive functioning). Here are basic principles to adopt:

  • If you can forget it, you will, so all tasks should go onto the to-do list.
  • You should keep only 1 list. Adding on “stickies” is not allowed.
  • Your list is like an extra lobe of your brain: It should be present at all times, whether you keep it in “the Cloud,” on your desktop, or on paper.
  • Review your list and clean it up at least daily. This takes time, but it also saves time—in spades—when you can call upon the right task, at the right time, with energy and drive.
  • The first action you should take in the daily review is to weed out or delegate tasks.
  • Next, categorize remaining tasks. (Note: The free smartphone app Evernote allows you to do this with “tags.”) Categorizing allows you to process sets of tasks in buckets that can be tackled as a bundle and, therefore, more efficiently. For example, having all of your errands, items to research, and telephone calls that need to be returned in separate buckets allows for speedier processing—as opposed to veering back and forth between line items.
  • Then, move remaining high-priority items to the top of the list. However, remember that, if everything is urgent, nothing is. Items that are low-hanging fruit that you can cross off the list in a matter of minutes can be prioritized even if they are not as urgent. By doing that, your list becomes more manageable and your brain can dive deeper into more complex tasks.
  • Block out calendar time for each of your buckets with this formula: (1) Estimate how much time you’ll need to complete the tasks in each bucket, then add 50% for each bucket. (2) Add in commuting, set-up, or wind-down time, if you need it, to the grand total for all buckets, and then add 50% more than you’ve estimated

Set the brain free!

This process will seem like a burden at the beginning, when the synapses underneath it still need to get stronger (much like how the body responds to exercise). However, as long as these principles are put into action daily, they will become a trusted, second-nature system that frees the brain from distraction and anxiety—and, ultimately, for being more creative and mindful.

 

 

Issue
Current Psychiatry - 15(10)
Issue
Current Psychiatry - 15(10)
Page Number
e1-e2
Page Number
e1-e2
Publications
Publications
Topics
Article Type
Sections
Disallow All Ads
Article PDF Media

Ataxia due to alcohol abuse

Article Type
Changed
Thu, 04/19/2018 - 08:52
Display Headline
Ataxia due to alcohol abuse

The video associated with this article is no longer available on this site. Please view all of our videos on the MDedge YouTube channel
 
Publications
Topics
Sections
Related Articles

The video associated with this article is no longer available on this site. Please view all of our videos on the MDedge YouTube channel
 

The video associated with this article is no longer available on this site. Please view all of our videos on the MDedge YouTube channel
 
Publications
Publications
Topics
Article Type
Display Headline
Ataxia due to alcohol abuse
Display Headline
Ataxia due to alcohol abuse
Sections
Disallow All Ads

Sanofi Gets $43 M U.S. Funding to Spur Zika Vaccine Development

Article Type
Changed
Fri, 09/14/2018 - 12:02
Display Headline
Sanofi Gets $43 M U.S. Funding to Spur Zika Vaccine Development

(Reuters) - Sanofi SA said on Monday the U.S. Department of Health and Human Services (HHS) approved $43.18 million in funding to accelerate the development of a Zika vaccine, as efforts to prevent the infection gather momentum.

The funding from the HHS' Biomedical Advanced Research and Development Authority (BARDA) will be used for mid-stage trials, expected to begin in the first half of 2018, and for manufacturing, the French drugmaker said.

The contract runs through June 2022, but if the data is positive, the contract includes an option for up to additional $130.45 million for late-stage trials necessary for eventual approval.

Work on the vaccine began in March as a collaborative effort between the U.S. Department Of Defense's Walter Reed Army Institute of Research (WRAIR), BARDA and the National Institutes of Health. Sanofi in July teamed up with WRAIR to co-develop the vaccine.

Earlier this month, BARDA gave Japanese drugmaker Takeda Pharmaceutical Co nearly $20 million in initial funding to develop a Zika vaccine.

Sanofi is one of the many companies around the world looking to develop a vaccine against the virus that has spread rapidly since the current outbreak was first detected last year in Brazil.

Hundreds of thousands of people are estimated to have been infected with Zika in the Americas and parts of Asia. Most have no symptoms or experience only a mild illness.

The virus can penetrate the womb in pregnant women, causing a rare but crippling birth defect known as microcephaly. In adults, it has been linked to Guillain-Barre syndrome, a form of temporary paralysis.

Zika, a member of the flavivirus species that includes dengue, yellow fever and West Nile virus, is typically spread by the bite of the Aedes aegypti mosquito.

It can be also passed on through sex, a unique characteristic among mosquito-borne viruses.

Sanofi Pasteur, the vaccine unit of Sanofi, already has several vaccines approved for others flaviviruses, such as yellow fever, dengue and Japanese encephalitis.

As of September, the HHS has awarded at least $433 million in repurposed funds to support Zika response and preparedness activities.

Issue
The Hospitalist - 2016(09)
Publications
Sections

(Reuters) - Sanofi SA said on Monday the U.S. Department of Health and Human Services (HHS) approved $43.18 million in funding to accelerate the development of a Zika vaccine, as efforts to prevent the infection gather momentum.

The funding from the HHS' Biomedical Advanced Research and Development Authority (BARDA) will be used for mid-stage trials, expected to begin in the first half of 2018, and for manufacturing, the French drugmaker said.

The contract runs through June 2022, but if the data is positive, the contract includes an option for up to additional $130.45 million for late-stage trials necessary for eventual approval.

Work on the vaccine began in March as a collaborative effort between the U.S. Department Of Defense's Walter Reed Army Institute of Research (WRAIR), BARDA and the National Institutes of Health. Sanofi in July teamed up with WRAIR to co-develop the vaccine.

Earlier this month, BARDA gave Japanese drugmaker Takeda Pharmaceutical Co nearly $20 million in initial funding to develop a Zika vaccine.

Sanofi is one of the many companies around the world looking to develop a vaccine against the virus that has spread rapidly since the current outbreak was first detected last year in Brazil.

Hundreds of thousands of people are estimated to have been infected with Zika in the Americas and parts of Asia. Most have no symptoms or experience only a mild illness.

The virus can penetrate the womb in pregnant women, causing a rare but crippling birth defect known as microcephaly. In adults, it has been linked to Guillain-Barre syndrome, a form of temporary paralysis.

Zika, a member of the flavivirus species that includes dengue, yellow fever and West Nile virus, is typically spread by the bite of the Aedes aegypti mosquito.

It can be also passed on through sex, a unique characteristic among mosquito-borne viruses.

Sanofi Pasteur, the vaccine unit of Sanofi, already has several vaccines approved for others flaviviruses, such as yellow fever, dengue and Japanese encephalitis.

As of September, the HHS has awarded at least $433 million in repurposed funds to support Zika response and preparedness activities.

(Reuters) - Sanofi SA said on Monday the U.S. Department of Health and Human Services (HHS) approved $43.18 million in funding to accelerate the development of a Zika vaccine, as efforts to prevent the infection gather momentum.

The funding from the HHS' Biomedical Advanced Research and Development Authority (BARDA) will be used for mid-stage trials, expected to begin in the first half of 2018, and for manufacturing, the French drugmaker said.

The contract runs through June 2022, but if the data is positive, the contract includes an option for up to additional $130.45 million for late-stage trials necessary for eventual approval.

Work on the vaccine began in March as a collaborative effort between the U.S. Department Of Defense's Walter Reed Army Institute of Research (WRAIR), BARDA and the National Institutes of Health. Sanofi in July teamed up with WRAIR to co-develop the vaccine.

Earlier this month, BARDA gave Japanese drugmaker Takeda Pharmaceutical Co nearly $20 million in initial funding to develop a Zika vaccine.

Sanofi is one of the many companies around the world looking to develop a vaccine against the virus that has spread rapidly since the current outbreak was first detected last year in Brazil.

Hundreds of thousands of people are estimated to have been infected with Zika in the Americas and parts of Asia. Most have no symptoms or experience only a mild illness.

The virus can penetrate the womb in pregnant women, causing a rare but crippling birth defect known as microcephaly. In adults, it has been linked to Guillain-Barre syndrome, a form of temporary paralysis.

Zika, a member of the flavivirus species that includes dengue, yellow fever and West Nile virus, is typically spread by the bite of the Aedes aegypti mosquito.

It can be also passed on through sex, a unique characteristic among mosquito-borne viruses.

Sanofi Pasteur, the vaccine unit of Sanofi, already has several vaccines approved for others flaviviruses, such as yellow fever, dengue and Japanese encephalitis.

As of September, the HHS has awarded at least $433 million in repurposed funds to support Zika response and preparedness activities.

Issue
The Hospitalist - 2016(09)
Issue
The Hospitalist - 2016(09)
Publications
Publications
Article Type
Display Headline
Sanofi Gets $43 M U.S. Funding to Spur Zika Vaccine Development
Display Headline
Sanofi Gets $43 M U.S. Funding to Spur Zika Vaccine Development
Sections
Disallow All Ads
Content Gating
No Gating (article Unlocked/Free)

Coordinating Better Care for Opioid-Addicted Women and Their Children

Article Type
Changed
Wed, 03/27/2019 - 11:51
SAMHSA and HHS release publications that promote best practices and policies for treating opioid addicted women and their children.

Caring for a woman who is addicted to opioids—and who is a mother or about to be—can be challenging. But child welfare systems are reporting heavier caseloads, primarily among infants and young children. Moreover, hospitals are reporting increasing numbers of infants born with neonatal abstinence syndrome.

As part of HHS’s overall initiative to address the many public health problems posed by the opioid disorder crisis, SAMHSA, with the Administration on Children, Youth, and Families, is releasing A Collaborative Approach to the Treatment of Pregnant Women with Opioid Use Disorders.

The guide is aimed at promoting a coordinated multisystemic approach among agencies and providers, including child welfare, medical, and substance abuse treatment, grounded in early identification and interventions to support families.

The publication covers the extent of opioid use by pregnant women and its effects on their fetus. It offers evidence-based recommendations for treatment approaches, along with recommendations for collaborative planning and tools to conduct a needs-and-gap analysis to develop a collaborative action plan.

SAMHSA also publishes Advancing the Care of Pregnant and Parenting Women with Opioid Use Disorder and their Infants: A Foundation for Clinical Guidance. This report summarizes the evidence review and rating processes SAMHSA used to establish appropriate interventions.

Publications
Topics
Sections
Related Articles
SAMHSA and HHS release publications that promote best practices and policies for treating opioid addicted women and their children.
SAMHSA and HHS release publications that promote best practices and policies for treating opioid addicted women and their children.

Caring for a woman who is addicted to opioids—and who is a mother or about to be—can be challenging. But child welfare systems are reporting heavier caseloads, primarily among infants and young children. Moreover, hospitals are reporting increasing numbers of infants born with neonatal abstinence syndrome.

As part of HHS’s overall initiative to address the many public health problems posed by the opioid disorder crisis, SAMHSA, with the Administration on Children, Youth, and Families, is releasing A Collaborative Approach to the Treatment of Pregnant Women with Opioid Use Disorders.

The guide is aimed at promoting a coordinated multisystemic approach among agencies and providers, including child welfare, medical, and substance abuse treatment, grounded in early identification and interventions to support families.

The publication covers the extent of opioid use by pregnant women and its effects on their fetus. It offers evidence-based recommendations for treatment approaches, along with recommendations for collaborative planning and tools to conduct a needs-and-gap analysis to develop a collaborative action plan.

SAMHSA also publishes Advancing the Care of Pregnant and Parenting Women with Opioid Use Disorder and their Infants: A Foundation for Clinical Guidance. This report summarizes the evidence review and rating processes SAMHSA used to establish appropriate interventions.

Caring for a woman who is addicted to opioids—and who is a mother or about to be—can be challenging. But child welfare systems are reporting heavier caseloads, primarily among infants and young children. Moreover, hospitals are reporting increasing numbers of infants born with neonatal abstinence syndrome.

As part of HHS’s overall initiative to address the many public health problems posed by the opioid disorder crisis, SAMHSA, with the Administration on Children, Youth, and Families, is releasing A Collaborative Approach to the Treatment of Pregnant Women with Opioid Use Disorders.

The guide is aimed at promoting a coordinated multisystemic approach among agencies and providers, including child welfare, medical, and substance abuse treatment, grounded in early identification and interventions to support families.

The publication covers the extent of opioid use by pregnant women and its effects on their fetus. It offers evidence-based recommendations for treatment approaches, along with recommendations for collaborative planning and tools to conduct a needs-and-gap analysis to develop a collaborative action plan.

SAMHSA also publishes Advancing the Care of Pregnant and Parenting Women with Opioid Use Disorder and their Infants: A Foundation for Clinical Guidance. This report summarizes the evidence review and rating processes SAMHSA used to establish appropriate interventions.

Publications
Publications
Topics
Article Type
Sections
Disallow All Ads
Alternative CME
Use ProPublica

An Atypical Angiomyomatous Hamartoma With Unexplained Hepatosplenomegaly

Article Type
Changed
Wed, 04/25/2018 - 14:50
When a patient presented with ipsilateral lymphedema of the limb, an excisional biopsy of the left inguinal lymph node showed extensive smooth muscle and vascular proliferation replacing most of the lymph node.

Angiomyomatous hamartoma (AMH) of the lymph node is an extremely uncommon vascular disorder of unknown etiology, first described by Chan and colleagues in 1992.1-3 Angiomyomatous hamartoma particularly involves inguinal and femoral lymph nodes, with few cases reported in the cervical, popliteal, and submandibular lymph nodes.1 Angiomyomatous hamartoma can occasionally be associated with edema of the ipsilateral limb. To the authors’ knowledge, to date only 18 cases of AMH have been reported.4

Case Presentation

A 40-year-old white man started to have a left inguinal and scrotal pain along with left thigh swelling at age 22 while serving in the U.S. Army.

A left hydrocelectomy was performed overseas; however, the patient’s symptoms persisted. He was evaluated in the U.S. at age 36, and the physical examination revealed a left medial thigh nonpitting edema, an enlarged left inguinal lymph node, bilateral axillary lymphadenopathy, and hepatosplenomegaly.
A complete blood count, basic metabolic panel, liver function tests, hepatitis workup, autoimmune profile, iron studies,
alpha-fetoprotein, and ceruloplasmin and copper levels were within normal limits.

 

An abdominal Doppler ultrasound did not show any evidence of portal hypertension. A thoraco-abdomino-pelvic computed tomography (CT) scan showed bilateral axillary, subcarinal (Figure 1), mesenteric and retroperitoneal (Figure 2), and left inguinal (Figure 3) lymphadenopathy. Excisional biopsy of a 3.5 x 2.5 x 1.5 cm left inguinal lymph node was performed, and histopathology showed extensive smooth muscle and vascular proliferation replacing most of the lymph node (Figure 4), a finding consistent with AMH. A trichrome staining (Figure 5) and immunohistochemical study for smooth muscle actin (Figure 6) were performed and supported the diagnosis. Due to persistent pain in the scrotal area, the patient underwent a left spermatic cord denervation. Currently, the patient has persistent left thigh swelling. His condition remains stable with a regular follow-up CT scan showing unchanged lymphadenopathy.

Discussion

Angiomyomatous hamartoma is a rare, primary vascular tumor of the lymph nodes occurring almost exclusively in the inguinal and femoral lymph nodes and occasionally associated with edema of the ipsilateral limb.1 A few cases with popliteal and cervical lymph node involvement have been reported.1 There are no prior reports of cases with either generalized adenopathy or hepatosplenomegaly.

The histopathogenesis of AMH remains unclear. Chan and colleagues first reported this distinct clinicopathologic entity in 1992 as a primary vascular tumor of the lymph node.1-3 The hamartomatous nature of the disease was postulated by the authors on the basis of a disorganized growth pattern of smooth muscle cells and blood vessels noted on pathology.2,3 The AMH could represent a localized malformation in a congenitally damaged lymphatic vessel system.5 Other hypothesis suggests lymphedema as a possible etiology of AMH through continuous stimulation of lymphatic vessels, which triggers vasoproliferation and eventually the vascular transformation of the lymph nodes.5

Differential diagnoses of AMH include nodal lymphangiomyomatosis, which is most prevalent in women, particularly presenting with thoracic and intra-abdominal lymph nodes and plumper HMB45 (human melanoma black 45) -positive tumor cells6; leiomyomato

sis, which tends to have an intra-abdominal localization with compact bundles of smooth muscle cells and insignificant vascular component; and angiomyolipoma, which typically presents with retroperitoneal nodes and HMB45-positive cells.

Treatment is either conservative or surgical, depending on clinical judgment. This is only the 19th case of AMH reported so far in the literature and the fifth reported case in which the patient presented with ipsilateral lymphedema of the limb. Importantly, it is the first reported case with generalized (axillary, subcarinal, mesenteric, inguinal and retroperitoneal) lymphadenopathy and unexplained hepatosplenomegaly.

 

Conclusion

Angiomyomatous hamartoma of the lymph nodes is an exceedingly rare diagnosis but should be considered when evaluating patients with lymphatic tumors. This patient remains relatively asymptomatic and on observation at this time and seems to have more extensive disease than prior reports in the literature.

References

1. Mridha AR, Ranjan R, Kinra P, Ray R, Khan SA, Shivanand G. Angiomyomatous hamartoma of popliteal lymph node: an unusual entity. J Pathol Transl Med. 2015;49(2):156-158.

2. Dargent JL, Lespagnard L, Verdebout JM, Bourgeois P, Munck D. Glomeruloid microvascular proliferation in angiomyomatous hamartoma of the lymph node. Virchows Arch. 2004;445(3):320-322.

3. Chan JK, Frizzera G, Fletcher CD, Rosai J. Primary vascular tumors of lymph nodes other than Kaposi’s sarcoma. Analysis of 39 cases and delineation of two new entities. Am J Surg Pathol. 1992;16(4):335-350.

4. Ram M, Alsanjari N, Ansari N. Angiomyomatous hamartoma: a rare case report with review of the literature. Rare Tumors. 2009;1(2):e25.

5. Piedimonte A, De Nictolis M, Lorenzini P, Sperti V, Bertani A. Angiomyomatous hamartoma of inguinal lymph nodes. Plast Reconstr Surg. 2006;117(2):714-716.

6. Lee CH, Chang TC, Ku JW. Angiomyomatous hamartoma in an inguinal lymph node with proliferating pericytes/smooth muscle cells, plexiform vessel tangles, and ectopic calcification. Indian J Pathol Microbiol. 2015;58(2):226-228.

Article PDF
Author and Disclosure Information

Dr. Chaaya is a medical resident at the Orlando VAMC, at the University of Central Florida in Orlando, and at the Osceola Regional Medical Center in Kissimmee, Florida. Dr. Kang is a pathology physician at James A. Haley Veterans' Hospital in Tampa, Florida, and an associate professor in the College of Medicine at the University of South Florida in Tampa. Dr. Vishnubhotla is the chief of medicine at the Orlando VAMC and assistant professor at the University of Central Florida College of Medicine.

Author disclosures

The authors report no actual or potential conflicts of interest with regard to this article.

Disclaimer

The opinions expressed herein are those of the authors and do not necessarily reflect those of Federal Practitioner, Frontline Medical Communications Inc., the U.S. Government, or any of its agencies. This article may discuss unlabeled or investigational use of certain drugs. Please review the complete prescribing information for specific drugs or drug combinations—including indications, contraindications, warnings, and adverse effects—before administering pharmacologic therapy to patients.

Issue
Federal Practitioner - 33(9)
Publications
Topics
Page Number
38-40
Sections
Author and Disclosure Information

Dr. Chaaya is a medical resident at the Orlando VAMC, at the University of Central Florida in Orlando, and at the Osceola Regional Medical Center in Kissimmee, Florida. Dr. Kang is a pathology physician at James A. Haley Veterans' Hospital in Tampa, Florida, and an associate professor in the College of Medicine at the University of South Florida in Tampa. Dr. Vishnubhotla is the chief of medicine at the Orlando VAMC and assistant professor at the University of Central Florida College of Medicine.

Author disclosures

The authors report no actual or potential conflicts of interest with regard to this article.

Disclaimer

The opinions expressed herein are those of the authors and do not necessarily reflect those of Federal Practitioner, Frontline Medical Communications Inc., the U.S. Government, or any of its agencies. This article may discuss unlabeled or investigational use of certain drugs. Please review the complete prescribing information for specific drugs or drug combinations—including indications, contraindications, warnings, and adverse effects—before administering pharmacologic therapy to patients.

Author and Disclosure Information

Dr. Chaaya is a medical resident at the Orlando VAMC, at the University of Central Florida in Orlando, and at the Osceola Regional Medical Center in Kissimmee, Florida. Dr. Kang is a pathology physician at James A. Haley Veterans' Hospital in Tampa, Florida, and an associate professor in the College of Medicine at the University of South Florida in Tampa. Dr. Vishnubhotla is the chief of medicine at the Orlando VAMC and assistant professor at the University of Central Florida College of Medicine.

Author disclosures

The authors report no actual or potential conflicts of interest with regard to this article.

Disclaimer

The opinions expressed herein are those of the authors and do not necessarily reflect those of Federal Practitioner, Frontline Medical Communications Inc., the U.S. Government, or any of its agencies. This article may discuss unlabeled or investigational use of certain drugs. Please review the complete prescribing information for specific drugs or drug combinations—including indications, contraindications, warnings, and adverse effects—before administering pharmacologic therapy to patients.

Article PDF
Article PDF
Related Articles
When a patient presented with ipsilateral lymphedema of the limb, an excisional biopsy of the left inguinal lymph node showed extensive smooth muscle and vascular proliferation replacing most of the lymph node.
When a patient presented with ipsilateral lymphedema of the limb, an excisional biopsy of the left inguinal lymph node showed extensive smooth muscle and vascular proliferation replacing most of the lymph node.

Angiomyomatous hamartoma (AMH) of the lymph node is an extremely uncommon vascular disorder of unknown etiology, first described by Chan and colleagues in 1992.1-3 Angiomyomatous hamartoma particularly involves inguinal and femoral lymph nodes, with few cases reported in the cervical, popliteal, and submandibular lymph nodes.1 Angiomyomatous hamartoma can occasionally be associated with edema of the ipsilateral limb. To the authors’ knowledge, to date only 18 cases of AMH have been reported.4

Case Presentation

A 40-year-old white man started to have a left inguinal and scrotal pain along with left thigh swelling at age 22 while serving in the U.S. Army.

A left hydrocelectomy was performed overseas; however, the patient’s symptoms persisted. He was evaluated in the U.S. at age 36, and the physical examination revealed a left medial thigh nonpitting edema, an enlarged left inguinal lymph node, bilateral axillary lymphadenopathy, and hepatosplenomegaly.
A complete blood count, basic metabolic panel, liver function tests, hepatitis workup, autoimmune profile, iron studies,
alpha-fetoprotein, and ceruloplasmin and copper levels were within normal limits.

 

An abdominal Doppler ultrasound did not show any evidence of portal hypertension. A thoraco-abdomino-pelvic computed tomography (CT) scan showed bilateral axillary, subcarinal (Figure 1), mesenteric and retroperitoneal (Figure 2), and left inguinal (Figure 3) lymphadenopathy. Excisional biopsy of a 3.5 x 2.5 x 1.5 cm left inguinal lymph node was performed, and histopathology showed extensive smooth muscle and vascular proliferation replacing most of the lymph node (Figure 4), a finding consistent with AMH. A trichrome staining (Figure 5) and immunohistochemical study for smooth muscle actin (Figure 6) were performed and supported the diagnosis. Due to persistent pain in the scrotal area, the patient underwent a left spermatic cord denervation. Currently, the patient has persistent left thigh swelling. His condition remains stable with a regular follow-up CT scan showing unchanged lymphadenopathy.

Discussion

Angiomyomatous hamartoma is a rare, primary vascular tumor of the lymph nodes occurring almost exclusively in the inguinal and femoral lymph nodes and occasionally associated with edema of the ipsilateral limb.1 A few cases with popliteal and cervical lymph node involvement have been reported.1 There are no prior reports of cases with either generalized adenopathy or hepatosplenomegaly.

The histopathogenesis of AMH remains unclear. Chan and colleagues first reported this distinct clinicopathologic entity in 1992 as a primary vascular tumor of the lymph node.1-3 The hamartomatous nature of the disease was postulated by the authors on the basis of a disorganized growth pattern of smooth muscle cells and blood vessels noted on pathology.2,3 The AMH could represent a localized malformation in a congenitally damaged lymphatic vessel system.5 Other hypothesis suggests lymphedema as a possible etiology of AMH through continuous stimulation of lymphatic vessels, which triggers vasoproliferation and eventually the vascular transformation of the lymph nodes.5

Differential diagnoses of AMH include nodal lymphangiomyomatosis, which is most prevalent in women, particularly presenting with thoracic and intra-abdominal lymph nodes and plumper HMB45 (human melanoma black 45) -positive tumor cells6; leiomyomato

sis, which tends to have an intra-abdominal localization with compact bundles of smooth muscle cells and insignificant vascular component; and angiomyolipoma, which typically presents with retroperitoneal nodes and HMB45-positive cells.

Treatment is either conservative or surgical, depending on clinical judgment. This is only the 19th case of AMH reported so far in the literature and the fifth reported case in which the patient presented with ipsilateral lymphedema of the limb. Importantly, it is the first reported case with generalized (axillary, subcarinal, mesenteric, inguinal and retroperitoneal) lymphadenopathy and unexplained hepatosplenomegaly.

 

Conclusion

Angiomyomatous hamartoma of the lymph nodes is an exceedingly rare diagnosis but should be considered when evaluating patients with lymphatic tumors. This patient remains relatively asymptomatic and on observation at this time and seems to have more extensive disease than prior reports in the literature.

Angiomyomatous hamartoma (AMH) of the lymph node is an extremely uncommon vascular disorder of unknown etiology, first described by Chan and colleagues in 1992.1-3 Angiomyomatous hamartoma particularly involves inguinal and femoral lymph nodes, with few cases reported in the cervical, popliteal, and submandibular lymph nodes.1 Angiomyomatous hamartoma can occasionally be associated with edema of the ipsilateral limb. To the authors’ knowledge, to date only 18 cases of AMH have been reported.4

Case Presentation

A 40-year-old white man started to have a left inguinal and scrotal pain along with left thigh swelling at age 22 while serving in the U.S. Army.

A left hydrocelectomy was performed overseas; however, the patient’s symptoms persisted. He was evaluated in the U.S. at age 36, and the physical examination revealed a left medial thigh nonpitting edema, an enlarged left inguinal lymph node, bilateral axillary lymphadenopathy, and hepatosplenomegaly.
A complete blood count, basic metabolic panel, liver function tests, hepatitis workup, autoimmune profile, iron studies,
alpha-fetoprotein, and ceruloplasmin and copper levels were within normal limits.

 

An abdominal Doppler ultrasound did not show any evidence of portal hypertension. A thoraco-abdomino-pelvic computed tomography (CT) scan showed bilateral axillary, subcarinal (Figure 1), mesenteric and retroperitoneal (Figure 2), and left inguinal (Figure 3) lymphadenopathy. Excisional biopsy of a 3.5 x 2.5 x 1.5 cm left inguinal lymph node was performed, and histopathology showed extensive smooth muscle and vascular proliferation replacing most of the lymph node (Figure 4), a finding consistent with AMH. A trichrome staining (Figure 5) and immunohistochemical study for smooth muscle actin (Figure 6) were performed and supported the diagnosis. Due to persistent pain in the scrotal area, the patient underwent a left spermatic cord denervation. Currently, the patient has persistent left thigh swelling. His condition remains stable with a regular follow-up CT scan showing unchanged lymphadenopathy.

Discussion

Angiomyomatous hamartoma is a rare, primary vascular tumor of the lymph nodes occurring almost exclusively in the inguinal and femoral lymph nodes and occasionally associated with edema of the ipsilateral limb.1 A few cases with popliteal and cervical lymph node involvement have been reported.1 There are no prior reports of cases with either generalized adenopathy or hepatosplenomegaly.

The histopathogenesis of AMH remains unclear. Chan and colleagues first reported this distinct clinicopathologic entity in 1992 as a primary vascular tumor of the lymph node.1-3 The hamartomatous nature of the disease was postulated by the authors on the basis of a disorganized growth pattern of smooth muscle cells and blood vessels noted on pathology.2,3 The AMH could represent a localized malformation in a congenitally damaged lymphatic vessel system.5 Other hypothesis suggests lymphedema as a possible etiology of AMH through continuous stimulation of lymphatic vessels, which triggers vasoproliferation and eventually the vascular transformation of the lymph nodes.5

Differential diagnoses of AMH include nodal lymphangiomyomatosis, which is most prevalent in women, particularly presenting with thoracic and intra-abdominal lymph nodes and plumper HMB45 (human melanoma black 45) -positive tumor cells6; leiomyomato

sis, which tends to have an intra-abdominal localization with compact bundles of smooth muscle cells and insignificant vascular component; and angiomyolipoma, which typically presents with retroperitoneal nodes and HMB45-positive cells.

Treatment is either conservative or surgical, depending on clinical judgment. This is only the 19th case of AMH reported so far in the literature and the fifth reported case in which the patient presented with ipsilateral lymphedema of the limb. Importantly, it is the first reported case with generalized (axillary, subcarinal, mesenteric, inguinal and retroperitoneal) lymphadenopathy and unexplained hepatosplenomegaly.

 

Conclusion

Angiomyomatous hamartoma of the lymph nodes is an exceedingly rare diagnosis but should be considered when evaluating patients with lymphatic tumors. This patient remains relatively asymptomatic and on observation at this time and seems to have more extensive disease than prior reports in the literature.

References

1. Mridha AR, Ranjan R, Kinra P, Ray R, Khan SA, Shivanand G. Angiomyomatous hamartoma of popliteal lymph node: an unusual entity. J Pathol Transl Med. 2015;49(2):156-158.

2. Dargent JL, Lespagnard L, Verdebout JM, Bourgeois P, Munck D. Glomeruloid microvascular proliferation in angiomyomatous hamartoma of the lymph node. Virchows Arch. 2004;445(3):320-322.

3. Chan JK, Frizzera G, Fletcher CD, Rosai J. Primary vascular tumors of lymph nodes other than Kaposi’s sarcoma. Analysis of 39 cases and delineation of two new entities. Am J Surg Pathol. 1992;16(4):335-350.

4. Ram M, Alsanjari N, Ansari N. Angiomyomatous hamartoma: a rare case report with review of the literature. Rare Tumors. 2009;1(2):e25.

5. Piedimonte A, De Nictolis M, Lorenzini P, Sperti V, Bertani A. Angiomyomatous hamartoma of inguinal lymph nodes. Plast Reconstr Surg. 2006;117(2):714-716.

6. Lee CH, Chang TC, Ku JW. Angiomyomatous hamartoma in an inguinal lymph node with proliferating pericytes/smooth muscle cells, plexiform vessel tangles, and ectopic calcification. Indian J Pathol Microbiol. 2015;58(2):226-228.

References

1. Mridha AR, Ranjan R, Kinra P, Ray R, Khan SA, Shivanand G. Angiomyomatous hamartoma of popliteal lymph node: an unusual entity. J Pathol Transl Med. 2015;49(2):156-158.

2. Dargent JL, Lespagnard L, Verdebout JM, Bourgeois P, Munck D. Glomeruloid microvascular proliferation in angiomyomatous hamartoma of the lymph node. Virchows Arch. 2004;445(3):320-322.

3. Chan JK, Frizzera G, Fletcher CD, Rosai J. Primary vascular tumors of lymph nodes other than Kaposi’s sarcoma. Analysis of 39 cases and delineation of two new entities. Am J Surg Pathol. 1992;16(4):335-350.

4. Ram M, Alsanjari N, Ansari N. Angiomyomatous hamartoma: a rare case report with review of the literature. Rare Tumors. 2009;1(2):e25.

5. Piedimonte A, De Nictolis M, Lorenzini P, Sperti V, Bertani A. Angiomyomatous hamartoma of inguinal lymph nodes. Plast Reconstr Surg. 2006;117(2):714-716.

6. Lee CH, Chang TC, Ku JW. Angiomyomatous hamartoma in an inguinal lymph node with proliferating pericytes/smooth muscle cells, plexiform vessel tangles, and ectopic calcification. Indian J Pathol Microbiol. 2015;58(2):226-228.

Issue
Federal Practitioner - 33(9)
Issue
Federal Practitioner - 33(9)
Page Number
38-40
Page Number
38-40
Publications
Publications
Topics
Article Type
Sections
Disallow All Ads
Alternative CME
Use ProPublica
Article PDF Media

Companies withheld info related to rivaroxaban trial, BMJ says

Article Type
Changed
Fri, 09/30/2016 - 06:00
Display Headline
Companies withheld info related to rivaroxaban trial, BMJ says

Rivaroxaban (Xarelto)

The pharmaceutical companies developing the anticoagulant rivaroxaban (Xarelto) withheld information about the system used to measure international normalized ratios (INRs) in the ROCKET AF trial, according to an investigation published in The BMJ.

ROCKET AF was used to support the approval of rivaroxaban in the US and European Union, and the Alere INRatio Monitor System was used to measure INRs in the warfarin arm of the trial.

The system was later recalled because it was shown to provide falsely low test results.

The BMJ said Janssen and Bayer, the companies developing rivaroxaban, knew about concerns regarding the accuracy of the INRatio system while ROCKET AF was underway but allowed the system to be used in the trial anyway.

The companies also neglected to mention these concerns to regulatory authorities prior to rivaroxaban’s approval and later failed to notify regulators about the recall of the INRatio system and its potential impact on ROCKET AF.

In addition, Janssen, which was responsible for conducting ROCKET AF, did not tell regulators about a safety program the company launched during the trial to address concerns about the INRatio system.

In fact, The BMJ’s investigation suggests Janssen kept this program a secret from ROCKET AF investigators, the trial’s data and safety monitoring board, and Bayer.

How the events unfolded

ROCKET AF, which was launched in February 2007, was a comparison of rivaroxaban and warfarin in patients with nonvalvular atrial fibrillation.

Results from the trial, published in NEJM in August 2011, suggested rivaroxaban was noninferior to warfarin for preventing stroke or systemic embolism. And there was no significant difference between the treatment arms with regard to major or nonmajor clinically relevant bleeding.

These results were used to support the approval of rivaroxaban in the European Union in September 2011 and in the US in November 2011.

A number of critics, including The BMJ, have questioned the results of ROCKET AF because the INRatio system (INRatio Monitor or INRatio2 Monitor and INRatio Test Strips) has been shown to give falsely low test results.

The system was recalled for certain patients in December 2014 and was withdrawn from the market in July 2016.

The BMJ said Janssen and Bayer did not inform regulatory authorities about the December 2014 recall—and how issues with the INRatio system may have affected ROCKET AF—until The BMJ probed them in September 2015.

Once the authorities knew, they launched investigations. In February 2016, the European Medicine’s Agency (EMA) released a statement saying the defect with the INRatio system does not change the overall conclusions of ROCKET AF.

The US Food and Drug Administration (FDA) is still conducting its investigation but has not changed its recommendations regarding rivaroxaban.

The BMJ also reported that ROCKET AF’s executive committee and trial investigators raised concerns about the INRatio system shortly after the trial began.

Both Janssen and Bayer were aware of these concerns but did not disclose them to the FDA or EMA before rivaroxaban was approved.

Instead, Janssen launched the Covance recheck program in early 2008. This safety program involved an unblinded monitor checking INRatio readings against lab results if an investigator had concerns about the INRatio system.

Janssen did not inform ROCKET AF investigators or the trial’s data and safety monitoring board of the program. Bayer said it did not know about the program until this year, and the FDA and EMA have said the same.

Publications
Topics

Rivaroxaban (Xarelto)

The pharmaceutical companies developing the anticoagulant rivaroxaban (Xarelto) withheld information about the system used to measure international normalized ratios (INRs) in the ROCKET AF trial, according to an investigation published in The BMJ.

ROCKET AF was used to support the approval of rivaroxaban in the US and European Union, and the Alere INRatio Monitor System was used to measure INRs in the warfarin arm of the trial.

The system was later recalled because it was shown to provide falsely low test results.

The BMJ said Janssen and Bayer, the companies developing rivaroxaban, knew about concerns regarding the accuracy of the INRatio system while ROCKET AF was underway but allowed the system to be used in the trial anyway.

The companies also neglected to mention these concerns to regulatory authorities prior to rivaroxaban’s approval and later failed to notify regulators about the recall of the INRatio system and its potential impact on ROCKET AF.

In addition, Janssen, which was responsible for conducting ROCKET AF, did not tell regulators about a safety program the company launched during the trial to address concerns about the INRatio system.

In fact, The BMJ’s investigation suggests Janssen kept this program a secret from ROCKET AF investigators, the trial’s data and safety monitoring board, and Bayer.

How the events unfolded

ROCKET AF, which was launched in February 2007, was a comparison of rivaroxaban and warfarin in patients with nonvalvular atrial fibrillation.

Results from the trial, published in NEJM in August 2011, suggested rivaroxaban was noninferior to warfarin for preventing stroke or systemic embolism. And there was no significant difference between the treatment arms with regard to major or nonmajor clinically relevant bleeding.

These results were used to support the approval of rivaroxaban in the European Union in September 2011 and in the US in November 2011.

A number of critics, including The BMJ, have questioned the results of ROCKET AF because the INRatio system (INRatio Monitor or INRatio2 Monitor and INRatio Test Strips) has been shown to give falsely low test results.

The system was recalled for certain patients in December 2014 and was withdrawn from the market in July 2016.

The BMJ said Janssen and Bayer did not inform regulatory authorities about the December 2014 recall—and how issues with the INRatio system may have affected ROCKET AF—until The BMJ probed them in September 2015.

Once the authorities knew, they launched investigations. In February 2016, the European Medicine’s Agency (EMA) released a statement saying the defect with the INRatio system does not change the overall conclusions of ROCKET AF.

The US Food and Drug Administration (FDA) is still conducting its investigation but has not changed its recommendations regarding rivaroxaban.

The BMJ also reported that ROCKET AF’s executive committee and trial investigators raised concerns about the INRatio system shortly after the trial began.

Both Janssen and Bayer were aware of these concerns but did not disclose them to the FDA or EMA before rivaroxaban was approved.

Instead, Janssen launched the Covance recheck program in early 2008. This safety program involved an unblinded monitor checking INRatio readings against lab results if an investigator had concerns about the INRatio system.

Janssen did not inform ROCKET AF investigators or the trial’s data and safety monitoring board of the program. Bayer said it did not know about the program until this year, and the FDA and EMA have said the same.

Rivaroxaban (Xarelto)

The pharmaceutical companies developing the anticoagulant rivaroxaban (Xarelto) withheld information about the system used to measure international normalized ratios (INRs) in the ROCKET AF trial, according to an investigation published in The BMJ.

ROCKET AF was used to support the approval of rivaroxaban in the US and European Union, and the Alere INRatio Monitor System was used to measure INRs in the warfarin arm of the trial.

The system was later recalled because it was shown to provide falsely low test results.

The BMJ said Janssen and Bayer, the companies developing rivaroxaban, knew about concerns regarding the accuracy of the INRatio system while ROCKET AF was underway but allowed the system to be used in the trial anyway.

The companies also neglected to mention these concerns to regulatory authorities prior to rivaroxaban’s approval and later failed to notify regulators about the recall of the INRatio system and its potential impact on ROCKET AF.

In addition, Janssen, which was responsible for conducting ROCKET AF, did not tell regulators about a safety program the company launched during the trial to address concerns about the INRatio system.

In fact, The BMJ’s investigation suggests Janssen kept this program a secret from ROCKET AF investigators, the trial’s data and safety monitoring board, and Bayer.

How the events unfolded

ROCKET AF, which was launched in February 2007, was a comparison of rivaroxaban and warfarin in patients with nonvalvular atrial fibrillation.

Results from the trial, published in NEJM in August 2011, suggested rivaroxaban was noninferior to warfarin for preventing stroke or systemic embolism. And there was no significant difference between the treatment arms with regard to major or nonmajor clinically relevant bleeding.

These results were used to support the approval of rivaroxaban in the European Union in September 2011 and in the US in November 2011.

A number of critics, including The BMJ, have questioned the results of ROCKET AF because the INRatio system (INRatio Monitor or INRatio2 Monitor and INRatio Test Strips) has been shown to give falsely low test results.

The system was recalled for certain patients in December 2014 and was withdrawn from the market in July 2016.

The BMJ said Janssen and Bayer did not inform regulatory authorities about the December 2014 recall—and how issues with the INRatio system may have affected ROCKET AF—until The BMJ probed them in September 2015.

Once the authorities knew, they launched investigations. In February 2016, the European Medicine’s Agency (EMA) released a statement saying the defect with the INRatio system does not change the overall conclusions of ROCKET AF.

The US Food and Drug Administration (FDA) is still conducting its investigation but has not changed its recommendations regarding rivaroxaban.

The BMJ also reported that ROCKET AF’s executive committee and trial investigators raised concerns about the INRatio system shortly after the trial began.

Both Janssen and Bayer were aware of these concerns but did not disclose them to the FDA or EMA before rivaroxaban was approved.

Instead, Janssen launched the Covance recheck program in early 2008. This safety program involved an unblinded monitor checking INRatio readings against lab results if an investigator had concerns about the INRatio system.

Janssen did not inform ROCKET AF investigators or the trial’s data and safety monitoring board of the program. Bayer said it did not know about the program until this year, and the FDA and EMA have said the same.

Publications
Publications
Topics
Article Type
Display Headline
Companies withheld info related to rivaroxaban trial, BMJ says
Display Headline
Companies withheld info related to rivaroxaban trial, BMJ says
Disallow All Ads
Content Gating
No Gating (article Unlocked/Free)
Alternative CME
Disqus Comments
Default
Use ProPublica

Ponatinib approved to treat CML, ALL in Japan

Article Type
Changed
Fri, 09/30/2016 - 05:00
Display Headline
Ponatinib approved to treat CML, ALL in Japan

CML cells

Image from UCSD

The Japanese Pharmaceuticals and Medical Devices Agency (PMDA) has approved 2 uses of the tyrosine kinase inhibitor (TKI) ponatinib (Iclusig®).

The drug is now approved to treat recurrent or refractory Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) and chronic myeloid leukemia (CML) that was resistant to or intolerant of prior treatment.

Ponatinib will be manufactured and sold by Otsuka Pharmaceutical Co., Ltd.

Due to the limited existing treatment options for patients in Japan, Otsuka said it will provide access to ponatinib free of charge as soon as procedures are in place from an ethical standpoint.

This program will be offered at medical institutions where clinical trials of ponatinib were performed and which are amenable to accepting the drug access program until the product is listed on the Japan National Health Insurance price list.

About ponatinib

Ponatinib is a TKI discovered by ARIAD Pharmaceuticals, Inc. The drug has demonstrated activity against native and mutated BCR-ABL and other kinases.

The PMDA’s approval of ponatinib for CML and Ph+ ALL is based on data from a phase 1/2 trial of Japanese patients, a phase 1 trial, and the phase 2 PACE trial.

Extended follow-up data from the PACE trial, collected in 2013, suggested ponatinib can increase the risk of thrombotic events. When these data came to light, officials in the European Union and the US, where ponatinib had already been approved, began to investigate the drug.

Ponatinib was pulled from the US market for a little over 2 months, and trials of the TKI were placed on partial hold while the US Food and Drug Administration evaluated the drug’s safety. Ponatinib went back on the market in January 2014, with new safety measures in place.

Ponatinib was not pulled from the market in the European Union, but the European Medicine’s Agency released recommendations for safer use of the TKI. The Committee for Medicinal Products for Human Use reviewed data on ponatinib and decided its benefits outweigh its risks.

In addition to the European Union and the US, ponatinib has been approved in Australia, Canada, Israel, and Switzerland.

Publications
Topics

CML cells

Image from UCSD

The Japanese Pharmaceuticals and Medical Devices Agency (PMDA) has approved 2 uses of the tyrosine kinase inhibitor (TKI) ponatinib (Iclusig®).

The drug is now approved to treat recurrent or refractory Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) and chronic myeloid leukemia (CML) that was resistant to or intolerant of prior treatment.

Ponatinib will be manufactured and sold by Otsuka Pharmaceutical Co., Ltd.

Due to the limited existing treatment options for patients in Japan, Otsuka said it will provide access to ponatinib free of charge as soon as procedures are in place from an ethical standpoint.

This program will be offered at medical institutions where clinical trials of ponatinib were performed and which are amenable to accepting the drug access program until the product is listed on the Japan National Health Insurance price list.

About ponatinib

Ponatinib is a TKI discovered by ARIAD Pharmaceuticals, Inc. The drug has demonstrated activity against native and mutated BCR-ABL and other kinases.

The PMDA’s approval of ponatinib for CML and Ph+ ALL is based on data from a phase 1/2 trial of Japanese patients, a phase 1 trial, and the phase 2 PACE trial.

Extended follow-up data from the PACE trial, collected in 2013, suggested ponatinib can increase the risk of thrombotic events. When these data came to light, officials in the European Union and the US, where ponatinib had already been approved, began to investigate the drug.

Ponatinib was pulled from the US market for a little over 2 months, and trials of the TKI were placed on partial hold while the US Food and Drug Administration evaluated the drug’s safety. Ponatinib went back on the market in January 2014, with new safety measures in place.

Ponatinib was not pulled from the market in the European Union, but the European Medicine’s Agency released recommendations for safer use of the TKI. The Committee for Medicinal Products for Human Use reviewed data on ponatinib and decided its benefits outweigh its risks.

In addition to the European Union and the US, ponatinib has been approved in Australia, Canada, Israel, and Switzerland.

CML cells

Image from UCSD

The Japanese Pharmaceuticals and Medical Devices Agency (PMDA) has approved 2 uses of the tyrosine kinase inhibitor (TKI) ponatinib (Iclusig®).

The drug is now approved to treat recurrent or refractory Philadelphia chromosome-positive acute lymphoblastic leukemia (Ph+ ALL) and chronic myeloid leukemia (CML) that was resistant to or intolerant of prior treatment.

Ponatinib will be manufactured and sold by Otsuka Pharmaceutical Co., Ltd.

Due to the limited existing treatment options for patients in Japan, Otsuka said it will provide access to ponatinib free of charge as soon as procedures are in place from an ethical standpoint.

This program will be offered at medical institutions where clinical trials of ponatinib were performed and which are amenable to accepting the drug access program until the product is listed on the Japan National Health Insurance price list.

About ponatinib

Ponatinib is a TKI discovered by ARIAD Pharmaceuticals, Inc. The drug has demonstrated activity against native and mutated BCR-ABL and other kinases.

The PMDA’s approval of ponatinib for CML and Ph+ ALL is based on data from a phase 1/2 trial of Japanese patients, a phase 1 trial, and the phase 2 PACE trial.

Extended follow-up data from the PACE trial, collected in 2013, suggested ponatinib can increase the risk of thrombotic events. When these data came to light, officials in the European Union and the US, where ponatinib had already been approved, began to investigate the drug.

Ponatinib was pulled from the US market for a little over 2 months, and trials of the TKI were placed on partial hold while the US Food and Drug Administration evaluated the drug’s safety. Ponatinib went back on the market in January 2014, with new safety measures in place.

Ponatinib was not pulled from the market in the European Union, but the European Medicine’s Agency released recommendations for safer use of the TKI. The Committee for Medicinal Products for Human Use reviewed data on ponatinib and decided its benefits outweigh its risks.

In addition to the European Union and the US, ponatinib has been approved in Australia, Canada, Israel, and Switzerland.

Publications
Publications
Topics
Article Type
Display Headline
Ponatinib approved to treat CML, ALL in Japan
Display Headline
Ponatinib approved to treat CML, ALL in Japan
Disallow All Ads
Content Gating
No Gating (article Unlocked/Free)
Alternative CME
Disqus Comments
Default
Use ProPublica

Study sheds light on platelet disorders

Article Type
Changed
Fri, 09/30/2016 - 05:00
Display Headline
Study sheds light on platelet disorders

Platelets (blue) in a thrombus

Image by Andre E.X. Brown

Preclinical research has unearthed additional information about how platelets respond to shear stress, answering a 20-year-old question.

Investigators said this research provides new insights regarding platelet activation and clearance as well as insights into the pathophysiology of von Willebrand disease and related thrombocytopenic disorders.

The team described this work in Nature Communications.

Past research suggested that platelets respond to shear stress through a protein complex called GPIb-IX located on the platelet surface, but how this complex senses and responds to shear stress has remained a mystery for the past 20 years.

With the current study, investigators found that, contrary to popular belief, a certain region within GPIb-IX is structured.

This so-called mechanosensory domain (MSD) becomes unfolded on the platelet surface when von Willebrand factor binds to the GPIbα subunit of GPIb–IX under shear stress and imposes a pulling force on it.

The unfolding of MSD sets off a complex chain of events and sends an intracellular signal into the platelet that results in rapid platelet clearance.

“Every day, your bone marrow generates more than a billion platelets, and, every day, you clear the same number,” said study author Renhao Li, PhD, of Emory University School of Medicine in Atlanta, Georgia.

“It’s critical that your platelet count stays constant. Too few platelets can lead to . . . thrombocytopenia and may cause spontaneous bleeding or stroke. Thus, identifying the molecular ‘switch’ that triggers platelet clearance is important for designing new therapies to treat thrombocytopenia.”

The mechanism behind MSD-unfolding-induced platelet clearance is still unclear, but Dr Li said this research provides a good starting point for further inquiry into the phenomenon.

Publications
Topics

Platelets (blue) in a thrombus

Image by Andre E.X. Brown

Preclinical research has unearthed additional information about how platelets respond to shear stress, answering a 20-year-old question.

Investigators said this research provides new insights regarding platelet activation and clearance as well as insights into the pathophysiology of von Willebrand disease and related thrombocytopenic disorders.

The team described this work in Nature Communications.

Past research suggested that platelets respond to shear stress through a protein complex called GPIb-IX located on the platelet surface, but how this complex senses and responds to shear stress has remained a mystery for the past 20 years.

With the current study, investigators found that, contrary to popular belief, a certain region within GPIb-IX is structured.

This so-called mechanosensory domain (MSD) becomes unfolded on the platelet surface when von Willebrand factor binds to the GPIbα subunit of GPIb–IX under shear stress and imposes a pulling force on it.

The unfolding of MSD sets off a complex chain of events and sends an intracellular signal into the platelet that results in rapid platelet clearance.

“Every day, your bone marrow generates more than a billion platelets, and, every day, you clear the same number,” said study author Renhao Li, PhD, of Emory University School of Medicine in Atlanta, Georgia.

“It’s critical that your platelet count stays constant. Too few platelets can lead to . . . thrombocytopenia and may cause spontaneous bleeding or stroke. Thus, identifying the molecular ‘switch’ that triggers platelet clearance is important for designing new therapies to treat thrombocytopenia.”

The mechanism behind MSD-unfolding-induced platelet clearance is still unclear, but Dr Li said this research provides a good starting point for further inquiry into the phenomenon.

Platelets (blue) in a thrombus

Image by Andre E.X. Brown

Preclinical research has unearthed additional information about how platelets respond to shear stress, answering a 20-year-old question.

Investigators said this research provides new insights regarding platelet activation and clearance as well as insights into the pathophysiology of von Willebrand disease and related thrombocytopenic disorders.

The team described this work in Nature Communications.

Past research suggested that platelets respond to shear stress through a protein complex called GPIb-IX located on the platelet surface, but how this complex senses and responds to shear stress has remained a mystery for the past 20 years.

With the current study, investigators found that, contrary to popular belief, a certain region within GPIb-IX is structured.

This so-called mechanosensory domain (MSD) becomes unfolded on the platelet surface when von Willebrand factor binds to the GPIbα subunit of GPIb–IX under shear stress and imposes a pulling force on it.

The unfolding of MSD sets off a complex chain of events and sends an intracellular signal into the platelet that results in rapid platelet clearance.

“Every day, your bone marrow generates more than a billion platelets, and, every day, you clear the same number,” said study author Renhao Li, PhD, of Emory University School of Medicine in Atlanta, Georgia.

“It’s critical that your platelet count stays constant. Too few platelets can lead to . . . thrombocytopenia and may cause spontaneous bleeding or stroke. Thus, identifying the molecular ‘switch’ that triggers platelet clearance is important for designing new therapies to treat thrombocytopenia.”

The mechanism behind MSD-unfolding-induced platelet clearance is still unclear, but Dr Li said this research provides a good starting point for further inquiry into the phenomenon.

Publications
Publications
Topics
Article Type
Display Headline
Study sheds light on platelet disorders
Display Headline
Study sheds light on platelet disorders
Disallow All Ads
Content Gating
No Gating (article Unlocked/Free)
Alternative CME
Disqus Comments
Default
Use ProPublica

Fungus makes mosquitoes more susceptible to malaria

Article Type
Changed
Fri, 09/30/2016 - 05:00
Display Headline
Fungus makes mosquitoes more susceptible to malaria

Anopheles albimanus mosquito

Photo by James Gathany

Researchers say they have identified a fungus that compromises mosquitoes’ immune systems, making them more susceptible to infection with malaria parasites.

Malaria researchers have, in the past, identified microbes that prevent the Anopheles mosquito from being infected by malaria parasites, but this is the first time they have found a microorganism that appears to make the mosquito more likely to become infected with—and then spread—malaria.

The finding was published in Scientific Reports.

“This very common, naturally occurring fungus may have a significant impact on malaria transmission,” said study author George Dimopoulos, PhD, of the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland.

“It doesn’t kill the mosquitoes. It doesn’t make them sick. It just makes them more likely to become infected and thereby to spread the disease. While this fungus is unlikely to be helpful as part of a malaria control strategy, our finding significantly advances our knowledge of the different factors that influence the transmission of malaria.”

For this study, Dr Dimopoulos and his colleagues isolated the Penicillium chrysogenum fungus from the gut of field-caught Anopheles mosquitoes. The team found this fungus made the mosquitoes more susceptible to being infected by Plasmodium parasites through a secreted heat-stable factor.

The researchers said the mechanism behind this increased susceptibility involves upregulation of the mosquitoes’ ornithine decarboxylase gene, which sequesters arginine for polyamine biosynthesis.

They noted that arginine plays an important role in the mosquitoes’ anti-Plasmodium defense as a substrate of nitric oxide production, so the availability of arginine has a direct impact on susceptibility to infection with Plasmodium parasites.

Dr Dimopoulos said Penicillium chrysogenum had not previously been studied in terms of mosquito biology, and he and his team had hoped the fungus would act like several other bacteria that researchers have identified, which prevent mosquitoes from becoming infected with malaria parasites.

Even though Penicillium chrysogenum actually appears to worsen infections, the team believes the fungus can still help researchers in their fight against malaria.

“We have questions we hope this finding will help us to answer, including, ‘Why do we have increased transmission of malaria in some areas and not others when the presence of mosquitoes is the same?’” Dr Dimopoulos said. “This gives us another piece of the complicated malaria puzzle.”

Because environmental microorganisms can vary greatly from region to region, Dr Dimopoulos and his colleagues believe their finding may help explain variations in the prevalence of malaria in different geographic areas.

Publications
Topics

Anopheles albimanus mosquito

Photo by James Gathany

Researchers say they have identified a fungus that compromises mosquitoes’ immune systems, making them more susceptible to infection with malaria parasites.

Malaria researchers have, in the past, identified microbes that prevent the Anopheles mosquito from being infected by malaria parasites, but this is the first time they have found a microorganism that appears to make the mosquito more likely to become infected with—and then spread—malaria.

The finding was published in Scientific Reports.

“This very common, naturally occurring fungus may have a significant impact on malaria transmission,” said study author George Dimopoulos, PhD, of the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland.

“It doesn’t kill the mosquitoes. It doesn’t make them sick. It just makes them more likely to become infected and thereby to spread the disease. While this fungus is unlikely to be helpful as part of a malaria control strategy, our finding significantly advances our knowledge of the different factors that influence the transmission of malaria.”

For this study, Dr Dimopoulos and his colleagues isolated the Penicillium chrysogenum fungus from the gut of field-caught Anopheles mosquitoes. The team found this fungus made the mosquitoes more susceptible to being infected by Plasmodium parasites through a secreted heat-stable factor.

The researchers said the mechanism behind this increased susceptibility involves upregulation of the mosquitoes’ ornithine decarboxylase gene, which sequesters arginine for polyamine biosynthesis.

They noted that arginine plays an important role in the mosquitoes’ anti-Plasmodium defense as a substrate of nitric oxide production, so the availability of arginine has a direct impact on susceptibility to infection with Plasmodium parasites.

Dr Dimopoulos said Penicillium chrysogenum had not previously been studied in terms of mosquito biology, and he and his team had hoped the fungus would act like several other bacteria that researchers have identified, which prevent mosquitoes from becoming infected with malaria parasites.

Even though Penicillium chrysogenum actually appears to worsen infections, the team believes the fungus can still help researchers in their fight against malaria.

“We have questions we hope this finding will help us to answer, including, ‘Why do we have increased transmission of malaria in some areas and not others when the presence of mosquitoes is the same?’” Dr Dimopoulos said. “This gives us another piece of the complicated malaria puzzle.”

Because environmental microorganisms can vary greatly from region to region, Dr Dimopoulos and his colleagues believe their finding may help explain variations in the prevalence of malaria in different geographic areas.

Anopheles albimanus mosquito

Photo by James Gathany

Researchers say they have identified a fungus that compromises mosquitoes’ immune systems, making them more susceptible to infection with malaria parasites.

Malaria researchers have, in the past, identified microbes that prevent the Anopheles mosquito from being infected by malaria parasites, but this is the first time they have found a microorganism that appears to make the mosquito more likely to become infected with—and then spread—malaria.

The finding was published in Scientific Reports.

“This very common, naturally occurring fungus may have a significant impact on malaria transmission,” said study author George Dimopoulos, PhD, of the Johns Hopkins Bloomberg School of Public Health in Baltimore, Maryland.

“It doesn’t kill the mosquitoes. It doesn’t make them sick. It just makes them more likely to become infected and thereby to spread the disease. While this fungus is unlikely to be helpful as part of a malaria control strategy, our finding significantly advances our knowledge of the different factors that influence the transmission of malaria.”

For this study, Dr Dimopoulos and his colleagues isolated the Penicillium chrysogenum fungus from the gut of field-caught Anopheles mosquitoes. The team found this fungus made the mosquitoes more susceptible to being infected by Plasmodium parasites through a secreted heat-stable factor.

The researchers said the mechanism behind this increased susceptibility involves upregulation of the mosquitoes’ ornithine decarboxylase gene, which sequesters arginine for polyamine biosynthesis.

They noted that arginine plays an important role in the mosquitoes’ anti-Plasmodium defense as a substrate of nitric oxide production, so the availability of arginine has a direct impact on susceptibility to infection with Plasmodium parasites.

Dr Dimopoulos said Penicillium chrysogenum had not previously been studied in terms of mosquito biology, and he and his team had hoped the fungus would act like several other bacteria that researchers have identified, which prevent mosquitoes from becoming infected with malaria parasites.

Even though Penicillium chrysogenum actually appears to worsen infections, the team believes the fungus can still help researchers in their fight against malaria.

“We have questions we hope this finding will help us to answer, including, ‘Why do we have increased transmission of malaria in some areas and not others when the presence of mosquitoes is the same?’” Dr Dimopoulos said. “This gives us another piece of the complicated malaria puzzle.”

Because environmental microorganisms can vary greatly from region to region, Dr Dimopoulos and his colleagues believe their finding may help explain variations in the prevalence of malaria in different geographic areas.

Publications
Publications
Topics
Article Type
Display Headline
Fungus makes mosquitoes more susceptible to malaria
Display Headline
Fungus makes mosquitoes more susceptible to malaria
Disallow All Ads
Content Gating
No Gating (article Unlocked/Free)
Alternative CME
Disqus Comments
Default
Use ProPublica