WELLNESS
03/21/2009 05:12 am ET Updated Nov 17, 2011

A Prenatal Link To Alzheimer's?

New research at Genentech Inc. is challenging conventional thinking about Alzheimer's disease, providing a provocative theory about its cause and suggesting potential new targets for therapies to treat it.

The researchers propose that a normal process in which excess nerve cells and nerve fibers are pruned from the brain during prenatal development is somehow reactivated in the adult brain and "hijacked" to cause the death of such cells in Alzheimer's patients.

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