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Mount Sinai researchers discover novel mechanisms that might causally link type-2 diabetes to Alzheimer's disease
Date:4/10/2009

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 this week in the scientific journal, Archives of Neurology.

"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
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Contact: Mount Sinai Press Office
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The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

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