Phospholipase A2 in astrocytes: responses to oxidative stress, inflammation, and G protein-coupled receptor agonists.

Abstract:

:Astrocytes comprise the major cell type in the central nervous system (CNS) and they are essential for support of neuronal functions by providing nutrients and regulating cell-to-cell communication. Astrocytes also are immune-like cells that become reactive in response to neuronal injury. Phospholipases A2 (PLA2) are a family of ubiquitous enzymes that degrade membrane phospholipids and produce lipid mediators for regulating cellular functions. Three major classes of PLA2 are expressed in astrocytes: group IV calcium-dependent cytosolic PLA2 (cPLA2), group VI calcium-independent PLA2 (iPLA2), and group II secretory PLA2(sPLA2). Upregulation of PLA2 in reactive astrocytes has been shown to occur in a number of neurodegenerative diseases, including stroke and Alzheimer's disease. This review focuses on describing the effects of oxidative stress, inflammation, and activation of G protein-coupled receptors on PLA2 activation, arachidonic acid (AA) release, and production of prostanoids in astrocytes.

journal_name

Mol Neurobiol

journal_title

Molecular neurobiology

authors

Sun GY,Xu J,Jensen MD,Yu S,Wood WG,González FA,Simonyi A,Sun AY,Weisman GA

doi

10.1385/MN:31:1-3:027

subject

Has Abstract

pub_date

2005-01-01 00:00:00

pages

27-41

issue

1-3

eissn

0893-7648

issn

1559-1182

pii

MN:31:1-3:027

journal_volume

31

pub_type

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