期刊
REPRODUCTION FERTILITY AND DEVELOPMENT
卷 28, 期 4, 页码 459-474出版社
CSIRO PUBLISHING
DOI: 10.1071/RD14034
关键词
cattle; chromatin immunoprecipitation; implantation; transcription factor; uterus
资金
- French Ministry for Teaching and Research - Doctoral School Universite Paris Sud [ED419]
- European Network of Excellence 'Embryo Implantation Control' (EMBIC) [LSHN-CT-2004-512040]
- AIP Bioressources CHIPSTRAFFIC
- Science Foundation Ireland
- Higher Education Authority Irish Centre for High-End Computing (ICHEC)
- UK Biotechnology and Biological Sciences Research Council (BBSRC) [BB/I017240/1]
- [ANR-08-GENM-037]
- Biotechnology and Biological Sciences Research Council [BB/I017240/1] Funding Source: researchfish
- BBSRC [BB/I017240/1] Funding Source: UKRI
Signal transducer and activator of transcription (STAT) proteins are critical for the regulation of numerous biological processes. In cattle, microarray analyses identified STAT1 as a differentially expressed gene in the endometrium during the peri-implantation period. To gain new insights about STAT1 during the oestrous cycle and early pregnancy, we investigated STAT1 transcript and protein expression, as well as its biological activity in bovine tissue and cells of endometrial origin. Pregnancy increased STAT1 expression on Day 16, and protein and phosphorylation levels on Day 20. In cyclic and pregnant females, STAT1 was located in endometrial cells but not in the luminal epithelium at Day 20 of pregnancy. The expression of STAT1 during the oestrous cycle was not affected by progesterone supplementation. In vivo and in vitro, interferon-tau (IFNT) stimulated STAT1 mRNA expression, protein tyrosine phosphorylation and nuclear translocation. Using chromatin immunoprecipitation in IFNT-stimulated endometrial cells, we demonstrated an increase of STAT1 binding on interferon regulatory factor 1 (IRF1), cytokine-inducible SH2-containing protein (CISH), suppressor of cytokine signaling 1 and 3 (SOCS1, SOCS3) gene promoters consistent with the induction of their transcripts. Our data provide novel molecular insights into the biological functions of STAT1 in the various cells composing the endometrium during maternal pregnancy recognition and implantation.
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