When Alzheimer's Runs in the Family
Alzheimer's More Likely When Both Parents Have the Disease, Study Shows
March 10, 2008 -- Having two parents with Alzheimer's disease could make
Alzheimer's more likely.
That's according to a new study of 111 families in which both parents had
Of the nearly 300 children in those families, 22.6% developed Alzheimer's
For comparison, 6% to 13% of the general public develop Alzheimer's after
age 65, according to government statistics cited by the researchers, who
included Suman Jayadev, MD, of the University of Washington's neurology
Jayadev's team cautions that the findings may be an underestimate because
many of the adult children in the study were younger than 65. Alzheimer's
disease becomes more common with age, but it isn't a normal part of aging.
A family history of Alzheimer's disease beyond parents didn't affect the
odds of developing Alzheimer's disease, the study shows.
People who inherited the ApoE4 gene variation, which is linked to
Alzheimer's, were particularly likely to develop Alzheimer's disease. But ApoE4
didn't fully explain the results, so the researchers reason that other genes
must be involved in handing down Alzheimer's risk.
The study appears in the March edition of the Archives of