Featured Research

from universities, journals, and other organizations

Novel Mechanisms Might Causally Link Type-2 Diabetes To Alzheimer's Disease

Date:
April 17, 2009
Source:
The Mount Sinai Hospital / Mount Sinai School of Medicine
Summary:
A gene associated with onset of type-2 diabetes also decreases in Alzheimer's disease dementia cases, a new study suggests.

A recent study by Mount Sinai faculty suggests that a gene associated with onset of type-2 diabetes also decreases in Alzheimer's disease dementia cases. The research, led by Dr. Giulio Maria Pasinetti, MD, Ph.D., The Aidekman Family Professor in Neurology, and Professor of Psychiatry and Geriatrics and Adult Development at Mount Sinai School of Medicine, was published the week of April 6 in the scientific journal, Archives of Neurology.

Related Articles


"This new evidence is of extreme interest," Dr. Pasinetti tells us, "especially because of the evidence that approximately 60% of Alzheimer's disease dementia cases have at least one serious medical condition primarily associated with type-2 diabetes, a chronic condition which includes high blood glucose content (hyperglycemia) and reduced sensitivity to insulin, among other conditions."

"The relationship between type-2 diabetes and Alzheimer's disease is elusive," says Dr. Pasinetti. Not all subjects with type-2 diabetes are affected by Alzheimer's disease, and similarly, not all Alzheimer's disease cases are diabetic. However, in the last few years, epidemiological evidence indicates that, relative to healthy elderly subjects, people of the same age affected by type-2 diabetes are twice as likely to develop Alzheimer's disease dementia. The reason is not known. The new study from Dr. Pasinetti, reported in this week's issue of Archives of Neurology, provides insight into a potential mechanism that might explain the relationship between type-2 diabetes and Alzheimer's disease onset and progression.

Dr. Pasinetti and colleagues found that a gene known as proliferator-activated receptor coactivator 1 - (PGC-1 ), a key regulator of glucose content currently investigated as a potential therapeutic target for type-2 diabetes, is also decreased in Alzheimer' disease dementia cases. Most importantly, Dr. Pasinetti reports that PGC-1 decreased in Alzheimer' disease dementia cases with progression of the clinical disease and positively correlates with brain accumulation of β-amyloid, an abnormal protein highly linked to Alzheimer' disease dementia and brain degeneration. This evidence is of high interest to the field and suggests, for the first time, a strong relationship between decreased content of a gene responsible for type-2 diabetes in Alzheimer's disease dementia cases, says Dr. Pasinetti.

"Of considerable interest," continues Dr. Pasinetti, "is the evidence found in further mechanistic studies in our laboratory, indicating that promoting PGC-1 content in brain cells, using a transgenic mouse model of Alzheimer's disease, attenuates hyperglycemic-mediated production of β-amyloid, highly linked to Alzheimer' disease dementia. These findings are very exciting, and for the first time tentatively link type-2 diabetic metabolic defects to increasing dementia mediated by β-amyloid production."

The discovery in Dr. Pasinetti's laboratory has staggering societal implications: there are currently more than 5 million Americans affected by Alzheimer's disease dementia, and the disease incidence is expected to skyrocket in the three decades as the population ages. The question now is how we can translate this evidence into the development of novel approaches for disease prevention and treatment.

Dr. Pasinetti and his colleagues are optimistic that if they find that PGC-1α can be manipulated pharmacologically, these studies will provide important insights to be used in the formulation of novel treatments and possible preventative strategies in Alzheimer's disease.


Story Source:

The above story is based on materials provided by The Mount Sinai Hospital / Mount Sinai School of Medicine. Note: Materials may be edited for content and length.


Cite This Page:

The Mount Sinai Hospital / Mount Sinai School of Medicine. "Novel Mechanisms Might Causally Link Type-2 Diabetes To Alzheimer's Disease." ScienceDaily. ScienceDaily, 17 April 2009. <www.sciencedaily.com/releases/2009/04/090410123452.htm>.
The Mount Sinai Hospital / Mount Sinai School of Medicine. (2009, April 17). Novel Mechanisms Might Causally Link Type-2 Diabetes To Alzheimer's Disease. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2009/04/090410123452.htm
The Mount Sinai Hospital / Mount Sinai School of Medicine. "Novel Mechanisms Might Causally Link Type-2 Diabetes To Alzheimer's Disease." ScienceDaily. www.sciencedaily.com/releases/2009/04/090410123452.htm (accessed October 25, 2014).

Share This



More Health & Medicine News

Saturday, October 25, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Texas Nurse Nina Pham Cured of Ebola

Texas Nurse Nina Pham Cured of Ebola

AFP (Oct. 25, 2014) — An American nurse who contracted Ebola while caring for a Liberian patient in Texas has been declared free of the virus and will leave the hospital. Duration: 01:01 Video provided by AFP
Powered by NewsLook.com
Toxin-Packed Stem Cells Used To Kill Cancer

Toxin-Packed Stem Cells Used To Kill Cancer

Newsy (Oct. 25, 2014) — A Harvard University Research Team created genetically engineered stem cells that are able to kill cancer cells, while leaving other cells unharmed. Video provided by Newsy
Powered by NewsLook.com
IKEA Desk Converts From Standing to Sitting With One Button

IKEA Desk Converts From Standing to Sitting With One Button

Buzz60 (Oct. 24, 2014) — IKEA is out with a new convertible desk that can convert from a sitting desk to a standing one with just the push of a button. Jen Markham explains. Video provided by Buzz60
Powered by NewsLook.com
Ebola Protective Suits Being Made in China

Ebola Protective Suits Being Made in China

AFP (Oct. 24, 2014) — A factory in China is busy making Ebola protective suits for healthcare workers and others fighting the spread of the virus. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

Strange & Offbeat Stories

 

Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins