Shift from anti- to proinflammatory cytokine profiles in microglia through LPS- or IFN-gamma-mediated pathways

¹Division of Neurology, Huddinge University Hospital, Karolinska Hospital, Sweden.

|August 12, 1996

Abstract:

In this study, cytokine mRNA profiles in microglia from newborn rats were detected by in situ hybridization. Under natural culture conditions, microglia expressed the immunosuppressive transforming growth factor-beta 1 (TGF-beta 1) and interleukin (IL) 10 to a greater degree than the pro-inflammatory cytokines IL-1 beta, IL-6, IL-12, interferon-gamma (IFN-gamma) and TNF-alpha. High TGF-beta 1 and IL-10 levels could reflect one mechanism for immune privilege within the CNS under physiological conditions. Stimulation of microglia with LPS or IFN gamma resulted in strong up-regulation of proinflammatory cytokines, while TGF-beta 1 and IL-10 were down-regulated. These effects of LPS or IFN-gamma are anticipated to reflect immunopathogenic processes within the CNS.

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Abstract:

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