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Yin C, Liu J, He B, Jia L, Gong Y, Guo H, Zhao R. Heat stress induces distinct responses in porcine cumulus cells and oocytes associated with disrupted gap junction and trans-zonal projection colocalization. J Cell Physiol 2018; 234:4787-4798. [PMID: 30341896 DOI: 10.1002/jcp.27277] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2018] [Accepted: 07/26/2018] [Indexed: 01/02/2023]
Abstract
Cumulus cells (CCs), the granulosa cells surrounding the oocytes, play critical roles in oocytes maturation through intercellular communication by extending trans-zonal projections (TZPs) to contact oocytes via gap junctions (GJs). The adverse effect of heat stress (HS) on oocyte maturation has been well documented, whereas the HS responses of CCs and the oocytes in association with GJ/TZP colocalization remain unclear. In this study, porcine cumulus-oocyte complexes (COCs) were subjected to HS at 41.5°C for 24 hr during in vitro maturation. Cumulus expansion was impaired and oocyte quality was reduced with lower survival rate, polar body extrusion rate, and early embryo developmental potentials. CCs and oocytes isolated from COCs demonstrated distinct responses to HS. The messenger RNA abundance of heat shock protein-related genes and mitochondrial DNA-encoded genes, together with ATP content, were significantly increased in CCs, yet decreased in oocytes, despite activation of caspase 3 detected in both CCs and oocytes. Similar changes were observed when denuded oocytes and isolated CCs subjected to HS separately, except mitochondria reactive oxygen species (mROS). In heat-stressed COCs, mROS was significantly increased only in oocytes. However, when isolated CCs and denuded oocytes were heat-stressed separately, mROS was significantly increased only in CCs. Moreover, F-actin, a TZP marker, and its colocalization with a GJ protein connexin-45, were significantly reduced in heat-exposed COCs. These results indicate that HS induces distinct responses in porcine CCs and oocytes in association with disrupted GJ and TZP colocalization.
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Affiliation(s)
- Chao Yin
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Jie Liu
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Bin He
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Longfei Jia
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Yabin Gong
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Huiduo Guo
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
| | - Ruqian Zhao
- MOE Joint International Research Laboratory of Animal Health & Food Safety, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China.,Key Laboratory of Animal Physiology and Biochemistry, Ministry of Agriculture, College of Veterinary Science, Nanjing Agricultural University, Nanjing, China
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Xie C, Powell C, Yao M, Wu J, Dong Q. Ubiquitin-conjugating enzyme E2C: a potential cancer biomarker. Int J Biochem Cell Biol 2013; 47:113-7. [PMID: 24361302 DOI: 10.1016/j.biocel.2013.11.023] [Citation(s) in RCA: 71] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2013] [Accepted: 11/28/2013] [Indexed: 10/25/2022]
Abstract
The ubiquitin-conjugating enzymes 2C (UBE2C) is an integral component of the ubiquitin proteasome system. UBE2C consists of a conserved core domain containing the catalytic Cys residue and an N-terminal extension. The core domain is required for ubiquitin adduct formation by interacting with the ubiquitin-fold domain in the E1 enzyme, and contributes to the E3 enzyme binding. UBE2C N-terminal extension regulates E3 enzyme activity as a part of an intrinsic inhibitory mechanism. UBE2C is required for the destruction of mitotic cyclins and securin, which are essential for spindle assembly checkpoint and mitotic exit. The UBE2C mRNA and/or protein levels are aberrantly increased in many cancer types with poor clinical outcomes. Accumulation of UBE2C stimulates cell proliferation and anchorage-independent growth. UBE2C transgenic mice are prone to develop spontaneous tumors and carcinogen-induced tumor with evidence of chromosome aneuploidy.
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Affiliation(s)
- Chanlu Xie
- School of Science and Health, The University of Western Sydney, Australia
| | - Chris Powell
- School of Science and Health, The University of Western Sydney, Australia
| | - Mu Yao
- Central Clinical School and Bosch Institute, The University of Sydney and Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia
| | - Jianmin Wu
- The Kinghorn Cancer Centre & Cancer Division, Garvan Institute of Medical Research, Sydney, Australia; St Vincent's Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
| | - Qihan Dong
- School of Science and Health, The University of Western Sydney, Australia; Central Clinical School and Bosch Institute, The University of Sydney and Department of Endocrinology, Royal Prince Alfred Hospital, Sydney, Australia.
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