Abstract:
:Transforming growth factor beta (TGFbeta) is a critical immunosuppressive cytokine that inhibits the cell-mediated immune responses partly via inhibition of immunostimulatory cytokine production from T cells, NK cells, and macrophages. Here we investigated the effect of TGFbeta on NK cell activation induced by interleukin 18 (IL-18) using a murine NK cell line LNK5E6. IL-18 activated LNK5E6 cells to produce antiviral activity against vesicular stomatitis virus (VSV) and TGFbeta inhibited this activation. TGFbeta inhibited interferon-gamma (IFN-gamma) production in LNK5E6 cells treated with IL-18. TGFbeta also suppressed the IL-18 induced mRNA expression of IFN-gamma. Moreover, TGFbeta did not affect the transcriptional activity of IFN-gamma but decreased the half-life of IFN-gamma mRNA induced by IL-18. These results suggest that the destabilization of IFN-gamma mRNA induced by TGFbeta leads to the inhibition of antiviral activity and IFN-gamma production in IL-18 stimulated LNK5E6 cells.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Hayashi H,Inoue Y,Tsutsui H,Okamura H,Nakanishi K,Onozaki Kdoi
10.1016/s0006-291x(02)02939-xsubject
Has Abstractpub_date
2003-01-24 00:00:00pages
980-5issue
4eissn
0006-291Xissn
1090-2104pii
S0006291X0202939Xjournal_volume
300pub_type
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