| Literature DB >> 18381204 |
Shinya Kamitani1, Norihiko Ohbayashi, Osamu Ikeda, Sumihito Togi, Ryuta Muromoto, Yuichi Sekine, Kazuhide Ohta, Hironobu Ishiyama, Tadashi Matsuda.
Abstract
Signal transducers and activators of transcription (STATs) mediate cell proliferation, differentiation, and survival in immune responses, hematopoiesis, neurogenesis, and other biological processes. Recently, we showed that KAP1 is a novel STAT-binding partner that regulates STAT3-mediated transactivation. KAP1 is a universal co-repressor protein for the KRAB zinc finger protein superfamily of transcriptional repressors. In this study, we found KAP1-dependent repression of interferon (IFN)/STAT1-mediated signaling. We also demonstrated that endogenous KAP1 associates with endogenous STAT1 in vivo. Importantly, a small-interfering RNA-mediated reduction in KAP1 expression enhanced IFN-induced STAT1-dependent IRF-1 gene expression. These results indicate that KAP1 may act as an endogenous regulator of the IFN/STAT1 signaling pathway.Entities:
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Year: 2008 PMID： 18381204 DOI： 10.1016/j.bbrc.2008.03.104
Source DB: PubMed Journal: Biochem Biophys Res Commun ISSN： 0006-291X Impact factor: 3.575