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New gene associated with increased risk of Alzheimer's disease
Date:4/14/2010

TORONTO Researchers have identified a gene that appears to increase a person's risk of developing late-onset Alzheimer's disease, the most common type of Alzheimer's disease. The research will be presented as part of the late-breaking science program at the American Academy of Neurology's 62nd Annual Meeting in Toronto, April 10 17, 2010. The gene, abbreviated MTHFD1L, is located on chromosome six.

"Only recently have common variants in genes other than APOE been convincingly shown to be associated with a person's risk of developing late-onset Alzheimer's disease," said senior author Margaret Pericak-Vance, PhD, the principal investigator of the study and Director of the University of Miami Miller School of Medicine's John P. Hussman Institute for Human Genomics in Miami, Florida.

Researchers looked at gene variation throughout the human genomes of 2,269 people with late-onset Alzheimer's disease and 3,107 people without the disease through what's known as a genome-wide association study. Such studies involve looking at long stretches of DNA to identify small differences in the genetic sequence between people with and without Alzheimer's disease.

The study found that individuals with a particular variation in the gene MTHFD1L may be almost twice as likely to develop Alzheimer's disease as those people without the variation. "We are hopeful our identification of MTHFD1L as a risk gene for Alzheimer's disease will help us to better understand how this disease develops and potentially serve as a marker for people who may be at increased risk," said Adam Naj, PhD, with the University of Miami Miller School of Meidicne's John P. Hussman Institute for Human Genomics in Miami and the first author of the abstract reporting the discovery.

"Identifying this gene is important because the gene is known to be involved in influencing the body's levels of homocysteine, and high levels of homocysteine are strong risk factor for late-onse
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Contact: Rachel Seroka
rseroka@aan.com
651-695-2738
American Academy of Neurology
Source:Eurekalert

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