Cysteine dioxygenase and taurine are essential for embryo implantation by involving in E2-ERα and P4-PR signaling in mouse

作者：Di Zhang, Zhijuan Wang, Xuan Luo, Hongzhou Guo, Guobin Qiu, Yuneng Gong, Hongxu Gao, Sheng Cui · 发表于：Journal of Animal Science and Biotechnology/Journal of animal science and biotechnology · 年份：2023 · DOI：10.1186/s40104-022-00804-1 · 被引用次数：12 · 研究领域：Reproductive System and Pregnancy、Endometriosis Research and Treatment、Pregnancy and preeclampsia studies

Abstract Background Taurine performs multiple physiological functions, and the maintenance of taurine level for most mammals relies on active uptake from diet and endogenous taurine synthesis through its synthesis enzymes, including cysteine dioxygenase (CDO). In addition, uterus tissue and uterus fluid are rich in taurine, and taurine synthesis is regulated by estrogen (E 2 ) and progesterone (P 4 ), the key hormones priming embryo-uterine crosstalk during embryo implantation, but the functional interactions and mechanisms among which are largely unknown. The present study was thus proposed to identify the effects of CDO and taurine on embryo implantation and related mechanisms by using Cdo knockout (KO) and ovariectomy (OVX) mouse models. Results The uterine CDO expression was assayed from the first day of plugging (d 1) to d 8 and the results showed that CDO expression level increased from d 1 to d 4, followed by a significant decline on d 5 and persisted to d 8, which was highly correlated with serum and uterine taurine levels, and serum P 4 concentration. Next, Cdo KO mouse was established by CRISPER/Cas9. It was showed that Cdo deletion sharply decreased the taurine levels both in serum and uterus tissue, causing implantation defects and severe subfertility. However, the implantation defects in Cdo KO mice were partly rescued by the taurine supplementation. In addition, Cdo deletion led to a sharp decrease in the expressions of P 4 receptor (PR) and its responsive genes...