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Resistance to dementia may run in the family

Date:
August 15, 2012
Source:
American Academy of Neurology (AAN)
Summary:
People who are free of dementia and have high levels of a protein that indicates the presence of inflammation have relatives who are more likely to avoid the disease as well, according to a new study.

People who are free of dementia and have high levels of a protein that indicates the presence of inflammation have relatives who are more likely to avoid the disease as well, according to a new study published in the August 15, 2012, online issue of Neurology, the medical journal of the American Academy of Neurology.

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"In very elderly people with good cognition, higher levels of C-reactive protein, which is related to inflammation, are associated with better memory," said study author Jeremy M. Silverman, PhD, with Mount Sinai School of Medicine in New York. "Our results found that the higher the level of this protein in the study participant, the lower the risk for dementia in their parents and siblings."

For the study, researchers identified 277 male veterans age 75 and older and free of dementia symptoms. They were given a test that measured levels of the protein. Next, the group was interviewed about 1,329 parents and siblings and whether they had dementia. A total of 40 relatives from 37 families had dementia. A secondary, independent group of 51 men age 85 and older with no dementia symptoms were given an interview about 202 relatives for dementia. Nine of the relatives had dementia.

Study investigators found that participants who had higher amounts of the protein were more than 30 percent less likely to have relatives with dementia. Similar results were found in the secondary group. Since the protein levels were not associated with years of education, marital status, occupation and physical activity, these factors could not account for the lower risks seen.

"This protein is related to worse cognition in younger elderly people. Thus, for very old people who remain cognitively healthy, those with a high protein level may be more resistant to dementia," said Silverman. "Our study shows that this protection may be passed on to immediate relatives."

The study was supported by the National Institute on Aging, United States Department of Veterans Affairs, the Berkman Charitable Trust and the Alzheimer's Association.


Story Source:

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


Journal Reference:

  1. J. M. Silverman, J. Schmeidler, M. S. Beeri, C. Rosendorff, M. Sano, H. T. Grossman, J. R. Carrion-Baralt, I. N. Bespalova, R. West, V. Haroutunian. C-reactive protein and familial risk for dementia: A phenotype for successful cognitive aging. Neurology, 2012; DOI: 10.1212/WNL.0b013e3182698c89

Cite This Page:

American Academy of Neurology (AAN). "Resistance to dementia may run in the family." ScienceDaily. ScienceDaily, 15 August 2012. <www.sciencedaily.com/releases/2012/08/120815161613.htm>.
American Academy of Neurology (AAN). (2012, August 15). Resistance to dementia may run in the family. ScienceDaily. Retrieved October 25, 2014 from www.sciencedaily.com/releases/2012/08/120815161613.htm
American Academy of Neurology (AAN). "Resistance to dementia may run in the family." ScienceDaily. www.sciencedaily.com/releases/2012/08/120815161613.htm (accessed October 25, 2014).

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