Parkinson's Disease Tulip


advertisement
Reply
 
Thread Tools Display Modes
Old 01-29-2007, 03:54 PM #1
Stitcher's Avatar
Stitcher Stitcher is offline
Magnate
 
Join Date: Aug 2006
Posts: 2,136
15 yr Member
Stitcher Stitcher is offline
Magnate
Stitcher's Avatar
 
Join Date: Aug 2006
Posts: 2,136
My Mood: So how does anesthesia effect the PD brain?
15 yr Member
Default So how does anesthesia effect the PD brain?

Role Of Anesthetics In Alzheimer's Disease

28 Jan 2007
http://www.medicalnewstoday.com/medi...p?newsid=61653

Inhaled anesthetics commonly used in surgery are more likely to cause the aggregation of Alzheimer's disease-related plaques in the brain than intravenous anesthetics say University of Pittsburgh School of Medicine researchers in a journal article published in Biochemistry. This is the first report using state-of-the-art nuclear magnetic resonance (NMR) spectroscopic technique to explain the detailed molecular mechanism behind the aggregation of amyloid B (AB) peptide due to various anesthetics.

AB plaques are found in the brains of people with Alzheimer's disease. Many believe that the uncontrolled clumping of AB is the cause of Alzheimer's disease and that the similar aggregation of peptides and proteins play a role in the development of other neurodegenerative diseases such as Parkinson's disease.

"Many people know of or have heard of an elderly person who went into surgery where they received anesthesia and when they woke up they had noticeable memory loss or cognitive dysfunction," said Pravat K. Mandal, Ph.D., assistant professor of psychiatry, University of Pittsburgh School of Medicine and lead author of the study. Previous studies by the Pittsburgh researchers found that the inhaled anesthetics halothane and isoflurane and the intravenous anesthetic propofol encouraged the growth and clumping of AB in a test tube experiment.

"Our prior research had shown in molecular models that anesthetics may play a role by causing amyloid peptides to clump together - something that is thought to signal the advancement of Alzheimer's disease. In this study, we set out to see why this was happening and to determine if any one form of anesthesia might be a safer option than another," said Dr. Mandal.

In this study the researchers used NMR spectroscopy to determine how the inhaled anesthetics halothane and isoflurane and the intravenous anesthetics propofol and thiopental interact with AB influencing the aggregation of AB in forms commonly found in the brains of people with Alzheimer's disease. The results were strikingly different between the inhaled and injected anesthetics. The inhaled halothane and isoflurane had the most potent interaction with AB peptides causing the highest levels of AB aggregation. The injected anesthetic propofol only interacted and caused aggregation at high concentrations - interaction was not evident at lower concentrations. The intravenous thiopental did not cause the clustering of AB peptides even at high concentrations. Additionally, the molecular details for the interaction of these anesthetics with AB peptide were revealed.

Dr. Mandal noted that if the same thing occurs in humans, anesthetics could lead to more amyloid plaques which may lead to earlier memory problems, warranting further studies of anesthetics with AB both in laboratory and clinical settings.

###

The study was partly funded through grants from the American Parkinson Disease Association and American Health Assistance Foundation.

Contact: Jocelyn Uhl Duffy
University of Pittsburgh Medical Center
__________________
You're alive. Do something. The directive in life, the moral imperative was so uncomplicated. It could be expressed in single words, not complete sentences. It sounded like this: Look. Listen. Choose. Act. ~~Barbara Hall

I long to accomplish a great and noble tasks, but it is my chief duty to accomplish humble tasks as though they were great and noble. The world is moved along, not only by the mighty shoves of its heroes, but also by the aggregate of the tiny pushes of each honest worker. ~~Helen Keller
Stitcher is offline   Reply With QuoteReply With Quote

advertisement
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Can RSD effect the eyes and how? jclg Reflex Sympathetic Dystrophy (RSD and CRPS) 26 08-12-2014 02:29 PM
Does humidity effect your pain level? Pamster Chronic Pain 27 04-09-2009 12:20 PM
Lyrica Side Effect Question... Gromlily Thoracic Outlet Syndrome 4 08-26-2008 05:12 PM
Unusual Depakote side effect? fiberowendy2000 Bipolar Disorder 12 12-07-2006 05:50 PM


All times are GMT -5. The time now is 08:31 PM.

Powered by vBulletin • Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.

vBulletin Optimisation provided by vB Optimise v2.7.1 (Lite) - vBulletin Mods & Addons Copyright © 2022 DragonByte Technologies Ltd.
 

NeuroTalk Forums

Helping support those with neurological and related conditions.

 

The material on this site is for informational purposes only,
and is not a substitute for medical advice, diagnosis or treatment
provided by a qualified health care provider.


Always consult your doctor before trying anything you read here.