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 Neuroinflammationjournal_title
Journal of neuroinflammationauthors
Moses GS,Jensen MD,Lue LF,Walker DG,Sun AY,Simonyi A,Sun GYdoi
10.1186/1742-2094-3-28subject
Has Abstractpub_date
2006-10-07 00:00:00pages
28issn
1742-2094pii
1742-2094-3-28journal_volume
3pub_type
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