کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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2048486 | 1074082 | 2012 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: LY294002 inhibits TLR3/4-mediated IFN-β production via inhibition of IRF3 activation with a PI3K-independent mechanism LY294002 inhibits TLR3/4-mediated IFN-β production via inhibition of IRF3 activation with a PI3K-independent mechanism](/preview/png/2048486.png)
TLR3 and TLR4 utilize adaptor TRIF to activate interferon regulatory factor 3 (IRF3), resulting in interferon β (IFN-β) production to mediate anti-viral infection. In this report, we analyzed the effect of two known phosphatidylinositol 3-kinase (PI3K) inhibitors LY294002 and wortmannin on LPS- and poly(I:C)-induced IFN-β production in peritoneal macrophages. LY294002 inhibited LPS- and poly(I:C)-induced IFN-β transcription and secretion. In contrast, wortmannin could not inhibit IFN-β production. Furthermore, IRF3 transcriptional activation and binding to IFN-β promoter were found to be inhibited by LY294002. Therefore, our findings demonstrate LY294002 negatively regulates LPS- and poly(I:C)-induced IFN-β production through inhibition of IRF3 activation in a PI3K-independent manner.
► LY294002 and wortmannin have opposite functions on LPS- and poly(I:C)-induced IFN-β production.
► LY294002 inhibits LPS- and poly(I:C)-induced IFN-β transcription and secretion in a PI3K-independent manner.
► LY294002 inhibits TLR-induced IFN-β production through inhibition of IRF3 activation and IRF3 DNA binding.
Journal: FEBS Letters - Volume 586, Issue 6, 23 March 2012, Pages 705–710