APOE Allele Type Tied to Mortality Risk

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APOE Allele Type Tied to Mortality Risk
APOE Allele Type Tied to Mortality Risk

FRIDAY, Sept. 22, 2017 (HealthDay News) -- The apolipoprotein E (APOE) ε4 allele increases the risk of overall and cardiovascular mortality, while the APOE ε2 allele decreases the risk, according to a study published online Sept. 12 in the Journal of the American Geriatrics Society.

Kumar B. Rajan, Ph.D., from the Rush University Medical Center in Chicago, and colleagues compared the association between APOE allele and overall and cardiovascular mortality between 4,917 African-Americans (AAs; 68 percent) and European-Americans (EAs; 32 percent).

The researchers found that a higher proportion of AAs had an APOE ε2 allele (22 versus 13 percent) and an APOE ε4 allele (33 versus 24 percent), compared to EAs. The risk of mortality was 19 percent less with the APOE ε2 allele, and the risk of cardiovascular mortality was 35 percent less than with the ε3 ε3 allele, when adjusting for known risk factors. Compared to the ε3 ε3 allele, the risk of mortality was 10 percent greater with the APOE ε4 allele, and the risk of cardiovascular mortality was 20 percent greater. However, there was no difference between AAs and EAs for the association between APOE allele and mortality.

"Gaining better mechanistic understanding of the relationship between the APOE alleles and overall and cardiovascular mortality might provide a better understanding of the underlying risk mechanism and make possible more-translational approaches to decrease mortality and increase lifespan in the general population," the authors write.

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