Regulation of interferon-γ gene expression by nuclear factor of activated T cells
Regulation of interferon-γ gene expression by nuclear factor of activated T cells
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DOI：
10.1182/blood.v98.5.1480
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发表时间：
2001-09-01
期刊：
影响因子：
20.3
通讯作者：
Rao, A
中科院分区：
文献类型：
--
作者：
Kiani, A;García-Cózar, FJ;Rao, A
Transcription factors of the nuclear factor of activated T cells (NFAT) family are thought to regulate the expression of a variety of inducible genes such as Interleukin-2 (IL-2), IL-4, and tumor necrosis factor-alpha. However, It remains unresolved whether NFAT proteins play a role In regulating transcription of the Interferon-gamma (IFN-gamma) gene. Here it is shown that the transcription factor NFAT1 (NFATc2) is a major regulator of IFN-gamma production in vivo. Compared with T cells expressing NFAT1, T cells lacking NFAT1 display a substantial IL-4-independent defect in expression of IFN-gamma mRNA and protein. Reduced IFN-gamma production by NFAT1(-/-)x IL-4(-/-) T cells is observed after primary in vitro stimulation of naive CD4(+) T cells, Is conserved through at least 2 rounds of T-helper cell differentiation, and occurs by a cell-intrinsic mechanism that does not depend on overexpression of the Th2-specific factors GATA-3 and c-Maf. Concomitantly, NFAT1(-/-) x IL-4(-/-) mice show increased susceptibility to infection with the intracellular parasite Leishmania major. Moreover, IFN-gamma production in a murine T-cell clone Is sensitive to the selective peptide inhibitor of NFAT, VIVIT. These results suggest that IFN-gamma production by T cells is regulated by NFAT1, most likely at the level of gene transcription. (C) 2001 by The American Society of Hematology.
