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Scientists Gain Genetic Insight Into Alzheimer's Disease

Scientists Gain Genetic Insight Into Alzheimer's Disease

09/27/13

FRIDAY, Sept. 27 (HealthDay News) -- Researchers who identified two more gene mutations that increase a person's risk of developing late-onset Alzheimer's disease say their findings from studies with mice may help in efforts to prevent and treat the disease in humans.

The rare mutations occur in a gene called ADAM10 and are linked to the common form of Alzheimer's that strikes after age 60. This is the second gene confirmed to play a role in late-onset Alzheimer's and the fifth gene overall linked to the disease, according to the Massachusetts General Hospital researchers.

They found that the two mutations in ADAM10 increased production and accumulation of the beta-amyloid protein in the brains of mice. Beta-amyloid plaques are found in the brains of people with Alzheimer's disease.

The mutations also reduce creation of new nerve-related cells in the hippocampus, a part of the brain essential to learning and memory.

The study appears in the October issue of the journal Neuron.

"This is the first report to document, in animal models, new [disease-causing] gene mutations for Alzheimer's since the reports of the original four genes in the 1990s," study senior author Rudolph Tanzi, director of the genetics and aging unit at the MassGeneral Institute for Neurodegenerative Disease, said in a hospital news release.

"What we found regarding the many effects of these two rare mutations in ADAM10 strongly suggests that diminished activity of this enzyme can cause [Alzheimer's disease], and these findings support ADAM10 as a promising therapeutic target for both treatment and prevention," he said.

Scientists note, however, that research with animals often fails to provide similar results in humans.

More information

The U.S. National Institute on Aging has more about Alzheimer's disease.

Copyright © 2013 HealthDay. All rights reserved.

Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.

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