Navigation Links
Plaques, Tangles in Brain Don't Always Lead to Alzheimer's
Date:5/27/2009

Study raises questions about possible link

WEDNESDAY, May 27 (HealthDay News) -- New British research provides more evidence that the bits of gunk in the brain known as plaques and tangles don't necessarily lead to Alzheimer's disease, as many experts have long believed.

In fact, the study found that many people over the age of 75 had signs of significant clogging in their brains but still managed to avoid senility.

The findings don't have immediate ramifications for the treatment of Alzheimer's disease, which remains incurable and only somewhat treatable. But in conjunction with other studies, they could redirect ongoing research, said Dr. Gary Kennedy, director of the division of geriatric psychiatry at Montefiore Medical Center in New York City.

"A lot of what is out there that's focusing on reducing the formation of amyloid plaques and tangles may just be off the mark," Kennedy said.

Amyloid plaques are globs of protein that form outside brain cells and stick together. Tangles are bits of protein that develop inside brain cells and create havoc of their own. Both have been linked to Alzheimer's disease.

In the new study, British researchers examined the brains of 456 people who had donated their bodies to science. The subjects were 69 to 103 years old when they died.

The findings appear in the May 28 issue of the New England Journal of Medicine.

The team found a strong link between clogging in the brain and Alzheimer's in 75-year-olds, but the connection lessened by the time people were 95.

In other words, plaques and tangles developed in very old people just as in their younger counterparts, but the very old weren't as likely to develop Alzheimer's.

The picture is not perfectly clear, however. "At all ages, there are some people who don't become demented before they died -- despite having a lot of plaques and tangles," said study co-author Dr. Paul Ince. "We do not know what would have happened if they had survived."

It's possible that Alzheimer's disease shortens life, so people who are susceptible to it simply don't make it into the older age group, reasoned Ince, a professor of neuropathology and head of the Academic Unit of Pathology at Sheffield University Medical School in the U.K.

Also, he added, the study suggests that people who become senile at a very old age may be affected by another factor -- shrinking of the brain.

As for future research, "we need to take account of the ability of some people's brains to withstand Alzheimer's better than others," he said. "If we knew why, it might help us with strategies to delay the onset of dementia."

For now, doctors are very limited in how they can treat Alzheimer's, Kennedy said. Medications can treat symptoms, much as painkillers help some people tolerate arthritis, but they don't cure the disease, he said.

And in many cases, the drugs simply don't work, he said.

More information

To learn more, try the Alzheimer's Association.



SOURCES: Gary Kennedy, M.D., director, division of geriatric psychiatry, Montefiore Medical Center, New York City; Paul Ince, M.D., professor, neuropathology, and head, Academic Unit of Pathology, Sheffield University Medical School, U.K.; May 28, 2009, New England Journal of Medicine


'/>"/>
Copyright©2009 ScoutNews,LLC.
All rights reserved  

Related medicine news :

1. Fewer Brain Tangles May Mean Smarter Old Age
2. Researchers find first conclusive evidence of Alzheimers-like brain tangles in nonhuman primates
3. Vaccine Stops Alzheimers Brain Tangles
4. Singing brains offers epilepsy and schizophrenia clues
5. Games for Health Conference Announces First Cognitive Health Track Powered by SharpBrains
6. Fear Response May Stem From Protein in Brain
7. Cocaine Spurs Long-Term Change in Brain Chemistry
8. Brain Scans Show How Humans Hear Emotion
9. Bonnie Hunt, Melina Kanakaredes and Dr. Ruth Westheimer Lend Their Support to Childrens Brain Tumor Foundation Benefit
10. Man Dies of Brain Inflammation Caused by Deer Tick Virus
11. UCLA study shows traumatic brain injury haunts children for years
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Plaques, Tangles in Brain Don't Always Lead to Alzheimer's
(Date:2/22/2017)... ... February 22, 2017 , ... Michael J. ... media platform connecting healthcare technology professionals and other key stakeholders with an array ... publication starting on March 1, announced Michael J. Hennessy, Jr., president of MJH ...
(Date:2/22/2017)... ... ... Social media marketing is transitioning from a singular person activity to a collaborative ... this insight and more in its latest episode of its Brains Over Brawn podcast. ... social media strategist and partner of the digital firm Med|Ed Digital Jessica Columbo. Jessica ...
(Date:2/22/2017)... Wis (PRWEB) , ... February 22, 2017 , ... ... a category by itself - the Vector™ Series Multi-Cook Oven offers up to ... oven chamber, featuring exclusive Structured Air Technology™ for unmatched evenness in cooking. Alto-Shaam ...
(Date:2/21/2017)... IL (PRWEB) , ... February 21, 2017 , ... ... connectivity solutions, has introduced five new hospital-grade power extension cords that meet the ... Services (CMS) of the 2012 edition of the National Fire Protection Association (NFPA) ...
(Date:2/21/2017)... ... February 21, 2017 , ... Ray Insurance Agencies, a Dallas ... around Tarrant County, is embarking on a six month charity event aimed at raising ... cancer. , Cancer is one of the deadliest diseases in America; more than 7.5 ...
Breaking Medicine News(10 mins):
(Date:2/21/2017)... Texas , Feb. 21, 2017  Luminex Corporation (NASDAQ: ... board of directors has authorized the initiation of a quarterly ... history. This initial cash dividend will be payable on April ... of business on March 24, 2017. The ... regular quarterly cash dividend of $0.06 to holders of its ...
(Date:2/21/2017)... NEW YORK , Feb. 21, 2017 /PRNewswire/ ... Read the full report: http://www.reportlinker.com/p04711311-summary/view-report.html ... from COPD and other respiratory diseases. Patients having ... prescribed to use oxygen concentrators. Oxygen concentrators are ... be purchased over the counter. Medical oxygen concentrators ...
(Date:2/21/2017)... , February 21, 2017 ... Technology for Adoption by Plastic Industry  ... STEER, creator ... functionalise materials in the fields of plastics, pharmaceuticals, food and ... with Merck KGaA, Darmstadt, Germany , ...
Breaking Medicine Technology: