Secretory PLA2-IIA: a new inflammatory factor for Alzheimer's disease.

Abstract:

:Secretory phospholipase A2-IIA (sPLA2-IIA) is an inflammatory protein known to play a role in the pathogenesis of many inflammatory diseases. Although this enzyme has also been implicated in the pathogenesis of neurodegenerative diseases, there has not been a direct demonstration of its expression in diseased human brain. In this study, we show that sPLA2-IIA mRNA is up-regulated in Alzheimer's disease (AD) brains as compared to non-demented elderly brains (ND). We also report a higher percentage of sPLA2-IIA-immunoreactive astrocytes present in AD hippocampus and inferior temporal gyrus (ITG). In ITG, the majority of sPLA2-IIA-positive astrocytes were associated with amyloid beta (Abeta)-containing plaques. Studies with human astrocytes in culture demonstrated the ability of oligomeric Abeta1-42 and interleukin-1beta (IL-1beta) to induce sPLA2-IIA mRNA expression, indicating that this gene is among those induced by inflammatory cytokines. Since exogenous sPLA2-IIA has been shown to cause neuronal injury, understanding the mechanism(s) and physiological consequences of sPLA2-IIA upregulation in AD brain may facilitate the development of novel therapeutic strategies to inhibit the inflammatory responses and to retard the progression of the disease.

journal_name

J Neuroinflammation

authors

Moses GS,Jensen MD,Lue LF,Walker DG,Sun AY,Simonyi A,Sun GY

doi

10.1186/1742-2094-3-28

subject

Has Abstract

pub_date

2006-10-07 00:00:00

pages

28

issn

1742-2094

pii

1742-2094-3-28

journal_volume

3

pub_type

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