1
|
Wen Y, Zhan J, Li C, Li P, Wang C, Wu J, Xu Y, Zhang Y, Zhou Y, Li E, Nie H, Wu X. G-protein couple receptor (GPER1) plays an important role during ovarian folliculogenesis and early development of the Chinese Alligator. Anim Reprod Sci 2023; 255:107295. [PMID: 37422950 DOI: 10.1016/j.anireprosci.2023.107295] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2023] [Revised: 06/30/2023] [Accepted: 07/02/2023] [Indexed: 07/11/2023]
Abstract
The critical role of the G protein-coupled receptor 1 (GPER1), a member of the seven-transmembrane G protein-coupled receptor family, in the functional regulation of oocytes accumulated abundant theories in the early research on model animals. However, the full-length cDNA encoding GPER1 and its role in the folliculogenesis has not been illustrated in crocodilians. 0.5, 3, and 12 months old Alligator sinensis cDNA samples were used to clone the full-length cDNA encoding GPER1. Immunolocalization and quantitative analysis were performed using Immunofluorescence technique, RT-PCR and Western blot. Simultaneously, studies on GPER1's promoter deletion and cis-acting transcriptional regulation mechanism were conducted. Immunolocalization staining for the germline marker DDX4 and GPER1 demonstrated that DDX4-positive oocytes were clustered tightly together within the nests, whereas scarcely any detectable GPER1 was present in the oocytes nest in Stage I. After that, occasionally GPER1-positive immunosignal was observed in oocytes and somatic cells additional with the primordial follicles, and it was mainly located at the granulosa cells or thecal cells within the early PFs in the Stage III. The single mutation of the putative SP1 motif, double mutating of Ets/SP1 and SP1/CRE binding sites all depressed promoter activities. This result will help to investigate the role of GPER1 in the early folliculogenesis of A. sinensis.
Collapse
Affiliation(s)
- Yue Wen
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Jixiang Zhan
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Changcheng Li
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Pengfei Li
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Chong Wang
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Jie Wu
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Yunlu Xu
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Yuqian Zhang
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Yongkang Zhou
- Alligator Research Center of Anhui Province, Xuanzhou 242000, People's Republic of China
| | - En Li
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China
| | - Haitao Nie
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China.
| | - Xiaobing Wu
- College of Life Sciences, Anhui Normal University, Wuhu, Anhui Province, 241000, People's Republic of China; Key Laboratory for Conservation and Use of Important Biological Resources of Anhui Province, People's Republic of China.
| |
Collapse
|
2
|
Li YR, Ren CE, Zhang Q, Li JC, Chian RC. Expression of G protein estrogen receptor (GPER) on membrane of mouse oocytes during maturation. J Assist Reprod Genet 2013; 30:227-32. [PMID: 23420106 DOI: 10.1007/s10815-013-9942-z] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
PURPOSE To determine expression of G-protein estrogen receptor (GPER) in mouse oocyte membrane during maturation. METHODS The expression of GPER from different maturation stages of oocytes, in vivo and in vitro matured oocytes as well as aging oocytes was examined by immune-fluorescence GPR30 antibody and the images were analyzed by laser scanning confocal microscope. Further confirmation was performed by Western blots for cell fractionation. RESULTS Significant fluorescent signal was observed on the surface of mouse oocytes. The image expression was lower in germinal vesicle (GV) stage than mature metaphase-II (M-II) stage oocytes. There was high expression in in-vivo matured oocytes compared to in vitro matured oocytes. The highest expression was observed in aging oocytes compared with other oocytes. CONCLUSIONS The changes of expression of GPER on mouse oocytes plasma membrane confirm oocyte membrane maturation, suggesting that those changes of GPER may be related to the functional role of oocyte maturation.
Collapse
Affiliation(s)
- Yi-Ran Li
- Department of Obstetrics and Gynecology, Ningxia Medical University, Yinchuan, China
| | | | | | | | | |
Collapse
|
3
|
Clemens MJ. Initiation factor eIF2 alpha phosphorylation in stress responses and apoptosis. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2002; 27:57-89. [PMID: 11575161 DOI: 10.1007/978-3-662-09889-9_3] [Citation(s) in RCA: 169] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The alpha subunit of polypeptide chain initiation factor eIF2 can be phosphorylated by a number of related protein kinases which are activated in response to cellular stresses. Physiological conditions which result in eIF2 alpha phosphorylation include virus infection, heat shock, iron deficiency, nutrient deprivation, changes in intracellular calcium, accumulation of unfolded or denatured proteins and the induction of apoptosis. Phosphorylated eIF2 acts as a dominant inhibitor of the guanine nucleotide exchange factor eIF2B and prevents the recycling of eIF2 between successive rounds of protein synthesis. Extensive phosphorylation of eIF2 alpha and strong inhibition of eIF2B activity can result in the downregulation of the overall rate of protein synthesis; less marked changes may lead to alterations in the selective translation of alternative open reading frames in polycistronic mRNAs, as demonstrated in yeast. These mechanisms can provide a signal transduction pathway linking eukaryotic cellular stress responses to alterations in the control of gene expression at the translational level.
Collapse
Affiliation(s)
- M J Clemens
- Department of Biochemistry and Immunology, St George's Hospital Medical School, University of London, Cranmer Terrace, London SW17 0RE, UK
| |
Collapse
|
4
|
Khabar KS, Dhalla M, Siddiqui Y, Zhou A, Al-Ahdal MN, Der SD, Silverman RH, Williams BR. Effect of deficiency of the double-stranded RNA-dependent protein kinase, PKR, on antiviral resistance in the presence or absence of ribonuclease L: HSV-1 replication is particularly sensitive to deficiency of the major IFN-mediated enzymes. J Interferon Cytokine Res 2000; 20:653-9. [PMID: 10926208 DOI: 10.1089/107999000414835] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Control of viral replication by interferon (IFN) is thought to be principally mediated by the 2',5'-oligoadenylate synthetase (OAS)/RNAse L, double-stranded dependent protein kinase (PKR), and myxovirus resistance protein (Mx) pathways. In this study, we monitored the constitutive and IFN-induced antiviral activity in mouse embryo fibroblasts lines derived from mice with targeted disruption of either PKR or PKR/RNAse L genes. At high multiplicity of infection (moi = 10), the absence of PKR had no effect on replication of vesicular stomatitis virus (VSV) but moderately enhanced encephalomyocarditis virus (EMCV) growth and greatly increased replication of herpes simplex virus-1 (HSV-1). Replication of EMCV, HSV-1, and VSV was modestly higher in PKR-/- RNAse L-/- fibroblasts when compared with control cells. Although the antiviral action of IFN-alpha was unaffected by the absence of PKR, IFN action was significantly impaired in the double knockout cells but was dependent on the stage of the virus cycle. At early stages, it appeared that anti-EMCV and anti-HSV-1 action of IFN-alpha was significantly compromised, although weak residual antiviral activity was seen. The action of IFN-alpha against VSV was specifically compromised at a late stage of virus replication. The results showed that PKR is an important mediator in constitutive resistance against HSV-1 and that RNAse L is also necessary for the full antiviral activity of IFN against a variety of viruses. These results supported the existence of novel pathways aimed toward specific stages of the virus life cycle.
Collapse
Affiliation(s)
- K S Khabar
- Department of Biological and Medical Research, King Faisal Specialist Hospital and Research Center, Riyadh, Saudi Arabia.
| | | | | | | | | | | | | | | |
Collapse
|