ERK-MAP-kinases differentially regulate expression of IL-23 p19 compared with p40 and IFN-beta in Theiler's virus-infected RAW264.7 cells - PubMed (original) (raw)
Comparative Study
. 2005 Feb 15;97(1):47-53.
doi: 10.1016/j.imlet.2004.09.013.
Affiliations
- PMID: 15626475
- DOI: 10.1016/j.imlet.2004.09.013
Comparative Study
ERK-MAP-kinases differentially regulate expression of IL-23 p19 compared with p40 and IFN-beta in Theiler's virus-infected RAW264.7 cells
Thomas M Petro. Immunol Lett. 2005.
Abstract
Theiler's murine encephalomyelitis virus (TMEV) infection of macrophages induces a demyelinating disease (DD) in certain strains of mice that is similar to human multiple sclerosis. In contrast to IFN-beta, expression of IL-23 p19 and p40 subunits by macrophages in response to TMEV may contribute to DD. TMEV infection of macrophages likely induces IL-23 and IFN-beta by activating p38 or ERK MAP-kinases (MAPK) and the p38 substrate ATF-2 within 30 min. To determine the role of MAPKs in TMEV-induced IL-23 and IFN-beta expression, RAW264.7 cells were pretreated with SB203580 or U0126, inhibitors of p38 and ERK MAPKs, respectively. SB203580 significantly increased TMEV-induced p19 but decreased p40 expression. In contrast, U0126 decreased p19 and increased TMEV-induced p40 and IFN-beta expression. Interestingly, U0126 prolonged TMEV-induced ATF-2 activation to at least 3h. Thus ERK MAPKs regulate expression of TMEV-induced p19 differently than p40 and IFN-beta suggesting the benefits of U0126 in treatment of DD.
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