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More evidence that Alzheimer's disease may be inherited from your mother

Date:
February 28, 2011
Source:
American Academy of Neurology
Summary:
Results from a new study contribute to growing evidence that if one of your parents has Alzheimer's disease, the chances of inheriting it from your mother are higher than from your father.

Results from a new study contribute to growing evidence that if one of your parents has Alzheimer's disease, the chances of inheriting it from your mother are higher than from your father. The study is published in the March 1, 2011, print issue of Neurology, the medical journal of the American Academy of Neurology.

"It is estimated that people who have first-degree relatives with Alzheimer's disease are four to 10 times more likely to develop the disease themselves compared to people with no family history," said study author Robyn Honea, DPhil, of the University of Kansas School of Medicine in Kansas City.

For the study, 53 dementia-free people age 60 and over were followed for two years. Eleven participants reported having a mother with Alzheimer's disease, 10 had a father with Alzheimer's disease and 32 had no history of the disease in their family. The groups were given brain scans and cognitive tests throughout the study.

The researchers found that people with a mother who had Alzheimer's disease had twice as much gray matter shrinkage as the groups who had a father or no parent with Alzheimer's disease. In addition, those who had a mother with Alzheimer's disease had about one and a half times more whole brain shrinkage per year compared to those who had a father with the disease. Shrinking of the brain, or brain atrophy, occurs in Alzheimer's disease.

"Using 3-D mapping methods, we were able to look at the different regions of the brain affected in people with maternal or paternal ties to Alzheimer's disease," said Honea. "In people with a maternal family history of the disease, we found differences in the break-down processes in specific areas of the brain that are also affected by Alzheimer's disease, leading to shrinkage. Understanding how the disease may be inherited could lead to better prevention and treatment strategies."

The study was supported by the National Institute on Aging and the National Institute of Neurological Disorders and Stroke.


Story Source:

The above story is based on materials provided by American Academy of Neurology. Note: Materials may be edited for content and length.


Journal Reference:

  1. Robyn A. Honea, Russell H. Swerdlow, Eric D. Vidoni and Jeffrey M. Burns. Progressive regional atrophy in normal adults with a maternal history of Alzheimer disease. Neurology, March 1, 2011 vol. 76 no. 9 822-829 DOI: 10.1212/WNL.0b013e31820e7b74

Cite This Page:

American Academy of Neurology. "More evidence that Alzheimer's disease may be inherited from your mother." ScienceDaily. ScienceDaily, 28 February 2011. <www.sciencedaily.com/releases/2011/02/110228163026.htm>.
American Academy of Neurology. (2011, February 28). More evidence that Alzheimer's disease may be inherited from your mother. ScienceDaily. Retrieved July 31, 2014 from www.sciencedaily.com/releases/2011/02/110228163026.htm
American Academy of Neurology. "More evidence that Alzheimer's disease may be inherited from your mother." ScienceDaily. www.sciencedaily.com/releases/2011/02/110228163026.htm (accessed July 31, 2014).

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