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Liu X, Zhang L, Yang L, Cui J, Che S, Liu Y, Han J, An X, Cao B, Song Y. miR-34a/c induce caprine endometrial epithelial cell apoptosis by regulating circ-8073/CEP55 via the RAS/RAF/MEK/ERK and PI3K/AKT/mTOR pathways. J Cell Physiol 2020; 235:10051-10067. [PMID: 32474960 DOI: 10.1002/jcp.29821] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2019] [Revised: 05/16/2020] [Accepted: 05/16/2020] [Indexed: 02/06/2023]
Abstract
microRNAs (miRNAs) and circular RNAs (circRNAs) are important for endometrial receptivity establishment and embryo implantation in mammals. miR-34a and miR-34c are highly expressed in caprine receptive endometrium (RE). Herein, the functions and mechanisms of miR-34a/c in caprine endometrial epithelial cell (CEEC) apoptosis and RE establishment were investigated. miR-34a/c downregulated the expression level of centrosomal protein 55 (CEP55) and were sponged by circRNA8073 (circ-8073), thereby exhibiting a negative interaction in CEEC. miR-34a/c induced CEEC apoptosis by targeting circ-8073/CEP55 through the regulation of the RAS/RAF/MEK/ERK and phosphoitide 3-kinase (PI3K)/protein kinase B (AKT)/mammalian target of rapamycin (mTOR) pathways. Positive and negative feedback loops and cross-talk were documented between the RAS/RAF/MEK/ERK and PI3K/AKT/mTOR pathways. miR-34a/c regulated the levels of RE marker genes, including forkhead box M1, vascular endothelial growth factor, and osteopontin (OPN). These results suggest that miR-34a/c not only induce CEEC apoptosis by binding to circ-8073 and CEP55 via the RAS/RAF/MEK/ERK and PI3K/AKT/mTOR pathways, but may also regulate RE establishment in dairy goats.
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Affiliation(s)
- Xiaorui Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Lei Zhang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Lichun Yang
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Jiuzeng Cui
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Sicheng Che
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yuexia Liu
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Jincheng Han
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Xiaopeng An
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Binyun Cao
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
| | - Yuxuan Song
- College of Animal Science and Technology, Northwest A&F University, Yangling, Shaanxi, China
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