Journal
INTERNATIONAL IMMUNOPHARMACOLOGY
Volume 9, Issue 3, Pages 360-365Publisher
ELSEVIER
DOI: 10.1016/j.intimp.2009.01.002
Keywords
Oridonin; Lipopolysaccharide; NF-kappa B; NGF
Categories
Funding
- National Natural Science Foundation of China [30570706, 30671994]
- New Century Excellent Talents in University [NCET-06-0407]
- Knowledge Innovation Program of the Chinese Academy of Sciences [J0171-1905]
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Microglial activation has been implicated in many neurological disorders for its inflammatory and/or neurotrophic effects. In this study, we investigated the effects upon activated microglia of Oridonin (Ori), an effective component isolated from Rabdosia rubescens. We pretreated rat primary microglia with or without Ori, then stimulated with lipopolysaccharide (LPS). We found that Ori pretreatment inhibited the release of proinflammatory mediators including nitric oxide (NO). tumor necrosis factor-alpha (TNF-alpha), interleukin-1 beta (IL-1 beta) and interleukin-6 (IL-6). Such suppressive effects were accompanied by inhibition of DNA binding activity of the critical transcription factor nuclear factor-kappa B (NF-kappa B). In addition, On upregulated the production of the neurotrophic factor, nerve growth factor (NGF). Our findings suggest that Ori may have anti-inflammatory and neuroregulatory effects through modulation of multiple functions of microglia. (C) 2009 Elsevier B.V. All rights reserved
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