当前位置： SCI文献检索 > RHEUMATOLOGY INTERNATIONAL期刊下所有文献 > HMG-CoA reductase inhibitor simvastatin suppresses Toll-like receptor 2 ligand-induced activation of nuclear factor kappa B by preventing RhoA activation in monocytes from rheumatoid arthritis patients.

HMG-CoA reductase inhibitor simvastatin suppresses Toll-like receptor 2 ligand-induced activation of nuclear factor kappa B by preventing RhoA activation in monocytes from rheumatoid arthritis patients.

Abstract：

:To investigate whether anti-inflammatory effects of HMG-CoA reductase inhibitor simvastatin (SMV) in rheumatoid arthritis (RA) is mediated by Toll-like receptor-2 (TLR-2) signal via inhibiting activation of RhoA, a small Rho GTPase that plays an important role in inflammatory responses. Peripheral blood monocytes from active RA patients were treated with Staphylococcus aureus peptidoglycan (PG), a ligand of TLR-2, in the presence or absence of SMV. RhoA activity was assessed by a pull-down assay. DNA-binding activity was measured by a sensitive multi-well colorimetric assay. Cytokine secretion was measured by ELISA. PG stimulation increased the level of active GTP-bound RhoA compared with unstimulated monocytes, and the effect of PG on RhoA activity was suppressed with anti-TLR-2 monoclonal antibody. RhoA inhibition either with a specific inhibitor or by siRNA transfection inhibited activation of NF-κB and secretion of TNFα and IL-1β in PG-induced RA monocytes. SMV mitigated PG-induced increase in RhoA activity and NF-κB activation as well as secretion of TNFα and IL-1β. The inhibitory effects of SMV were completely reversed by mevalonate and geranylgeranyl pyrophosphate. Our results indicate the modulation of RhoA on TLR-2-mediated inflammatory signaling in RA and provide a novel evidence for anti-inflammatory effects of statins through influencing TLR-2 signaling via RhoA in RA.

journal_name

Rheumatol Int

journal_title

Rheumatology international

authors

Lin H,Xiao Y,Chen G,Fu D,Ye Y,Liang L,Fan J,Yang X,Sun L,Xu H

doi

10.1007/s00296-010-1510-6

subject

Has Abstract

pub_date

2011-11-01 00:00:00

pages

1451-8

issue

11

eissn

0172-8172

issn

1437-160X

journal_volume

31

pub_type

杂志文章

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