Gastrodin Inhibits Expression of Inducible NO Synthase, Cyclooxygenase-2 and Proinflammatory Cytokines in Cultured LPS-Stimulated Microglia via MAPK Pathways
机构:[1]Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China,[2]Department of Neurology, the First Affiliated Hospital of Kunming Medical University, Kunming, Yunnan, China,内科科室神经内科昆明医科大学附属第一医院[3]Kunming Pharmaceutical Corporation, Kunming, Yunnan, China,[4]Rehabilitation Engineering Research Laboratory, Biomedicine Engineering Research Centre, Kunming Medical University, Kunming, Yunnan, China
Background: Microglial activation plays an important role in neurodegenerative diseases by producing several proinflammatory enzymes and proinflammatory cytokines. The phenolic glucoside gastrodin, a main constituent of a Chinese herbal medicine, has been known to display anti-inflammatory properties. The current study investigates the potential mechanisms whereby gastrodin affects the expression of potentially pro-inflammatory proteins by cultured murine microglial BV-2 cells stimulated with lipopolysaccharide (LPS). Methodology/Principal Findings: BV-2 cells were pretreated with gastrodin (30, 40, and 60 mu M) for 1 h and then stimulated with LPS (1 mu g/ml) for another 4 h. The effects on proinflammatory enzymes, inducible nitric oxide synthase (iNOS) and cyclooxygenase-2 (COX-2), and proinflammatory cytokines, tumor necrosis factor-alpha (TNF-alpha), and interleukin-1 beta (IL-1 beta), are analysed by double-immunofluorescence labeling and RT-PCR assay. To reveal the mechanisms of action of gastrodin we investigated the involvement of mitogen-activated protein kinases (MAPKs) cascades and their downstream transcription factors, nuclear factor-kappa B (NF-kappa B) and cyclic AMP-responsive element (CRE)-binding protein (CREB). Gastrodin significantly reduced the LPS-induced protein and mRNA expression levels of iNOS, COX-2, TNF-alpha, IL-1 beta and NF-kappa B. LPS (1 mu g/ml, 30 min)-induced phosphorylation of extracellular signal-regulated kinase 1/2 (ERK1/2), c-Jun N-terminal protein kinase (JNK) and p38 mitogen-activated protein kinase (p38 MAPK) and this was inhibited by pretreatment of BV-2 cells with different concentrations of gastrodin (30, 40, and 60 mu M). In addition, gastrodin blocked LPS-induced phosphorylation of inhibitor kappa B-alpha (I kappa B-alpha) (and hence the activation of NF-kappa B) and of CREB, respectively. Conclusion and Implications: This study indicates that gastrodin significantly attenuate levels of neurotoxic proinflammatory mediators and proinflammatory cytokines by inhibition of the NF-kappa B signaling pathway and phosphorylation of MAPKs in LPS-stimulated microglial cells. Arising from the above, we suggest that gastrodin has a potential as an anti-inflammatory drug candidate in neurodegenerative diseases.
基金:
This work was supported in part by grants (30860336 and 30560170) from the National Natural Sciences Foundation of China, the grants (2008CC007
and 2009CI033) from the Department of Science and Technology of Yunnan Province, and the grants (2008CD016 and 2010CD156) from the Joint Special Funds
for the Department of Science and Technology of Yunnan Province-Kunming Medical University.
第一作者机构:[1]Department of Anatomy, Kunming Medical University, Kunming, Yunnan, China,
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推荐引用方式(GB/T 7714):
Ji-Nan Dai,Yi Zong,Lian-Mei Zhong,et al.Gastrodin Inhibits Expression of Inducible NO Synthase, Cyclooxygenase-2 and Proinflammatory Cytokines in Cultured LPS-Stimulated Microglia via MAPK Pathways[J].PLOS ONE.2011,6(7):doi:10.1371/journal.pone.0021891.
APA:
Ji-Nan Dai,Yi Zong,Lian-Mei Zhong,Yue-Min Li,Wei Zhang...&Di Lu.(2011).Gastrodin Inhibits Expression of Inducible NO Synthase, Cyclooxygenase-2 and Proinflammatory Cytokines in Cultured LPS-Stimulated Microglia via MAPK Pathways.PLOS ONE,6,(7)
MLA:
Ji-Nan Dai,et al."Gastrodin Inhibits Expression of Inducible NO Synthase, Cyclooxygenase-2 and Proinflammatory Cytokines in Cultured LPS-Stimulated Microglia via MAPK Pathways".PLOS ONE 6..7(2011)