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- W2058302043 abstract "Lipopolysaccharide (LPS) induces the expression of a wide range of pro-inflammatory mediators via NF-κB activation. These pro-inflammatory cytokines, such as tumor necrosis factor-α (TNF-α) and interleukin-1β (IL-1β), may be important in triggering atherogenesis. We have previously observed that actinonin, a meprin inhibitor, suppressed the formation of atherosclerotic plaques and, in in vitro experiments, actinonin also had an effect on the way LPS altered THP-1 cell function. The aim of the present study was to investigate whether meprin-α regulates LPS-induced production of TNF-α and IL-1β in peripheral blood mononuclear cells (PBMCs) and its potential mechanisms of action. We observed that meprin-α could enhance LPS-induced expression of TNF-α and IL-1β mRNA and protein in a time- and concentration-dependent manner, assessed using real-time PCR and ELISA. Meprin-α also significantly increased LPS-induced NF-κB transcriptional activity. Furthermore, we assessed the effects of meprin-α specific siRNA on the production of TNF-α and IL-1β to examine whether meprin-α was involved in the process of LPS-induced activation of PBMCs. Our results show that LPS-induced IL-1β and TNF-α production by PBMCs was significantly reversed by meprin-α specific siRNA. In addition, the augmentation of meprin-α of the LPS-induced expression of TNF-α and IL-1β was significantly decreased by Bay-117082, an inhibitor of NF-κB. In conclusion, our data indicate that meprin-α is capable of increasing LPS-induced production of cytokines in peripheral blood mononuclear cells, which might be associated with the activation of NF-κB." @default.
- W2058302043 created "2016-06-24" @default.
- W2058302043 creator A5009800205 @default.
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- W2058302043 date "2010-02-01" @default.
- W2058302043 modified "2023-09-27" @default.
- W2058302043 title "Meprin-α metalloproteases enhance lipopolysaccharide-stimulated production of tumour necrosis factor-α and interleukin-1β in peripheral blood mononuclear cells via activation of NF-κB" @default.
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- W2058302043 doi "https://doi.org/10.1016/j.regpep.2009.12.009" @default.
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