Apolipoprotein E protects astrocytes from hypoxia and glutamate-induced apoptosis.

Abstract:

:Apolipoprotein E (apoE) is predominantly synthesized by astrocytes in the brain. In this study, we investigated the role of apoE in astrocyte apoptosis. We demonstrated that apoE protects astrocytes from hypoxia-induced apoptosis in a dose-dependent manner. Glutamate release from astrocytic cultures is significantly lower from WT mice than from apoE knockout mice. Furthermore, the protective effect of apoE is mimicked by an NMDA receptor antagonist, MK-801. Finally, the apoE activator T0901317 significantly reduced the effect of glutamate-induced apoptosis of astrocytes. These results suggest that apoE protects astrocytes from hypoxia-induced apoptosis associated to NMDA receptor activation. Approaches that elevate apoE secretion in astrocytes might provide a novel strategy in the protection of neuronal ischemic injury.

journal_name

FEBS Lett

journal_title

FEBS letters

authors

Zhou S,Wu H,Zeng C,Xiong X,Tang S,Tang Z,Sun X

doi

10.1016/j.febslet.2012.12.003

subject

Has Abstract

pub_date

2013-01-16 00:00:00

pages

254-8

issue

2

eissn

0014-5793

issn

1873-3468

pii

S0014-5793(12)00908-8

journal_volume

587

pub_type

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