期刊
INFLAMMATION
卷 39, 期 1, 页码 375-384出版社
SPRINGER/PLENUM PUBLISHERS
DOI: 10.1007/s10753-015-0259-1
关键词
tanshinone IIA; TLR4-NF-kappa B pathway; microRNA; inflammatory mediators
资金
- National Key Basic Research Program of China [2012CB518404]
- National Natural Science Foundation of China [81273891]
- National Science Fund for Distinguished Young Scholars [81125024]
- Program for Changjiang Scholars and Innovative Research Team in University [IRT1276]
Inflammation is a physiological response to infection or injury and involves the innate and adaptive immune system. Tanshinone IIA (Tan IIA) is a well-known flavonoid that elicits an important therapeutic effect by inhibiting inflammatory response. In this study, we examined whether Tan IIA exerts anti-inflammatory activity and investigated the possible mechanisms, including Toll-like receptor 4 (TLR4)-MyD88-nuclear factor kappa B (NF-kappa B) signaling pathway and microRNA expression in lipopolysaccharide (LPS)-induced RAW264.7 cells. Tan IIA could attenuate the inflammatory reaction via decreasing cytokine, chemokine, and acute-phase protein production, including GM-CSF, sICAM-1, cxcl-1, MIP-1 alpha, and tumor necrosis factor alpha (TNF-alpha), analyzed by Proteome profile array in LPS-induced RAW264.7 cells. Concurrently, the messenger RNA (mRNA) expressions of IL-1 beta, TNF-alpha, and COX-2 were also significantly reduced by Tan IIA. Additionally, Tan IIA decreased LPS-induced NF-kappa B activation and downregulated TLR4 and MyD88 protein expression levels. We also observed reduced microRNA-155, miR-147, miR-184, miR-29b, and miR-34c expression levels, while LPS-induced microRNA-105, miR-145a, miR-194, miR-383, miR-132, and miR-451a expression levels were upregulated using microRNA (miRNA) qPCR array. Our results indicate that Tan IIA could exert an anti-inflammatory effect on LPS-induced RAW264.7 cells by decreasing TLR4-MyD88-NF-kappa B signaling pathway and regulating a series of cytokine production and miRNA expression.
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