期刊
NUCLEIC ACIDS RESEARCH
卷 48, 期 6, 页码 2912-2923出版社
OXFORD UNIV PRESS
DOI: 10.1093/nar/gkaa039
关键词
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资金
- National Key R&D Program of China [2017YFA0503900]
- National Natural Science Foundation of China [91849208, 81702909, 81972602, 81871114, 81571374, 91949124, 8187051935]
- Science and Technology Program of Guangdong Province in China [2017B030301016, 2019B030301009, 2019A151510472]
- Shenzhen Municipal Commission of Science and Technology Innovation [ZDSYS20190902093401689, JCYJ20160226191451487, KQJSCX20180328093403969, JCYJ20180507182044945]
- China Postdoctoral Science Foundation [2015M582419]
NAD(+)-dependent SIRT7 deacylase plays essential roles in ribosome biogenesis, stress response, genome integrity, metabolism and aging, while how it is transcriptionally regulated is still largely unclear. TGF-beta signaling is highly conserved in multicellular organisms, regulating cell growth, cancer stemness, migration and invasion. Here, we demonstrate that histone deacetylase HDAC8 forms complex with SMAD3/4 heterotrimer and occupies SIRT7 promoter, wherein it deacetylates H4 and thus suppresses SIRT7 transcription. Treatment with HDAC8 inhibitor compromises TGF-beta signaling via SIRT7-SMAD4 axis and consequently, inhibits lung metastasis and improves chemotherapy efficacy in breast cancer. Our data establish a regulatory feedback loop of TGF-beta signaling, wherein HDAC8 as a novel cofactor of SMAD3/4 complex, transcriptionally suppresses SIRT7 via local chromatin remodeling and thus further activates TGF-beta signaling. Targeting HDAC8 exhibits therapeutic potential for TGF-beta signaling related diseases.
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