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Norcantharidin reduced cyclins and cytokines production in human peripheral blood mononuclear cells.

Abstract：

AIMS:To evaluate potential agents of therapeutic value in tissue inflammation, we studied norcantharidin (NCTD) and its derivatives for their effects on immune responses of human peripheral blood mononuclear cells (PBMC) in vitro. MAIN METHODS:PBMC proliferation was evaluated by tritiated thymidine uptake method. The production and gene expression of cytokines were determined with enzyme immunoassays (EIA) and reverse transcription-polymerase chain reaction (RT-PCR), respectively. KEY FINDINGS:Five derivatives from NCTD had no significant effect on cell proliferation in PBMC. NCTD inhibited PBMC proliferation induced by phytohemagglutinin (PHA) with a 50% inhibitory concentration (IC(50)) 42.1+/-2.3 microM. The inhibitory action of NCTD did not involve direct cytotoxicity. To localize the point in the PBMC proliferation where arrest occurred, a set of key regulatory events leading to the cell proliferation, including cell cycle progression, production and gene expression of interleukin-2 (IL-2), IL-4, IL-10, and interferon-gamma (IFN-gamma) and cyclins was examined. Data demonstrated NCTD arrested the cell cycle progression of activated PBMC from the G1 transition to the S phase. The cyclin D3, E, A, and B transcripts and protein production in PHA-treated PBMC was reduced by NCTD. Whereas NCTD exerted no effect on IL-4 and IFN-gamma production, it significantly alleviated the production and mRNA expression of IL-2 and IL-10 in activated PBMC. SIGNIFICANCE:The suppressant effects of NCTD on proliferation of PBMC activated by PHA therefore appear to be mediated, at least in part, through inhibition of cyclins and IL-2 production and arrest of cell cycle progression in the cells.

journal_name

Life Sci

journal_title

Life sciences

authors

Chen YC,Chang SC,Wu MH,Chuang KA,Wu JY,Tsai WJ,Kuo YC

doi

10.1016/j.lfs.2008.11.020

subject

Has Abstract

pub_date

2009-02-13 00:00:00

pages

218-26

issue

7-8

eissn

0024-3205

issn

1879-0631

pii

S0024-3205(08)00492-X

journal_volume

84

pub_type

杂志文章

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