Apolipoprotein E allele-specific antioxidant activity and effects on cytotoxicity by oxidative insults and beta-amyloid peptides.

Abstract:

:The apolipoprotein E (APOE) E4 allele is associated with Alzheimer's disease, cardiovascular disease, and decreased longevity. To probe the mechanism of these associations, cell lines were created which secrete each apoE isoform. ApoE conditioned media, purified apoE, and commercially obtained apoE protected B12 cells from hydrogen peroxide cytotoxicity with E2 > E3 > E4. Physiological levels of apoE protected cells from beta-amyloid peptides, while higher doses of apoE led to increased cytotoxicity. E2 > E3 > E4 possessed antioxidant activity, and apoE bound certain metal ions. The decreased antioxidant activity of E4 could contribute to its association with Alzheimer's disease, cardiovascular disease and decreased longevity.

journal_name

Nat Genet

journal_title

Nature genetics

authors

Miyata M,Smith JD

doi

10.1038/ng0996-55

subject

Has Abstract

pub_date

1996-09-01 00:00:00

pages

55-61

issue

1

eissn

1061-4036

issn

1546-1718

journal_volume

14

pub_type

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