The research, published in the October issue of Neuron magazine, found that the two rare mutations are found in the ADAM10 gene, the second gene found to play a role in Alzheimer's developed after the age of 60. It's the fifth gene overall linked to the disease.
"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," Tanzi said.
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