Sex-Specific Effects of Apolipoprotein ε4 Allele on Mortality in Very Old and Centenarian Japanese Men

Research output: Contribution to journalArticlepeer-review

Abstract

The apolipoprotein E4 (APOE ε4) allele has attracted attention as an age-related genetic factor, both in neurology and gerontology. To understand the effects of the APOE ε4 allele on mortality in elderly individuals, we combined Japanese prospective cohort studies comprising 535 very old individuals (85-99 years of age) and 930 centenarians (over 100 years of age) and analyzed the association between mortality rates and candidate factors, including the APOE ε4 allele. APOE genotyping revealed an inverse correlation between the APOE ε4 allele carrier rate and age. Additionally, APOE ε4 allele carrier rate in centenarian men was significantly lower than that in centenarian women. The association analysis between APOE ε4 allele carriers and all-cause mortality indicated that APOE ε4 carriers showed significantly higher mortality rates than the APOE ε4 noncarriers among men in the very old group. Further analysis using Cox proportional hazard models indicated that cause-specific mortalities, including pneumonia and severe dementia, were associated with APOE ε4 carriers. These findings indicate that the APOE ε4 allele shows phenotypic male-specific adverse effects in the very old, which would explain the high mortality rate observed in this group, resulting in a low APOE ε4 allele carrier rate in centenarian men.

Original languageEnglish
Pages (from-to)1874-1879
Number of pages6
JournalThe journals of gerontology. Series A, Biological sciences and medical sciences
Volume75
Issue number10
DOIs
Publication statusPublished - 2020 Sep 25

Keywords

  • APOE
  • APOE ε4 allele
  • All-cause mortality
  • Centenarians

ASJC Scopus subject areas

  • Ageing
  • Geriatrics and Gerontology

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