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Li W, Zeng W, Jin X, Xu H, Fang X, Ma Z, Cao G, Li R, Ma L. High-Altitude Stress Orchestrates mRNA Expression and Alternative Splicing of Ovarian Follicle Development Genes in Tibetan Sheep. Animals (Basel) 2022; 12:2812. [PMID: 36290198 PMCID: PMC9597790 DOI: 10.3390/ani12202812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Revised: 10/14/2022] [Accepted: 10/14/2022] [Indexed: 10/01/2023] Open
Abstract
High-altitude stress threatens the survival rate of Tibetan sheep and reduces their fertility. However, the molecular basis of this phenomenon remains elusive. Here, we used RNA-seq to elucidate the transcriptome dynamics of high-altitude stress in Tibetan sheep ovaries. In total, 104 genes were characterized as high-altitude stress-related differentially expressed genes (DEGs). In addition, 36 DEGs contributed to ovarian follicle development, and 28 of them were downregulated under high-altitude stress. In particular, high-altitude stress significantly suppressed the expression of two ovarian lymphatic system marker genes: LYVE1 and ADAMTS-1. Network analysis revealed that luteinizing hormone (LH)/follicle-stimulating hormone (FSH) signaling-related genes, such as EGR1, FKBP5, DUSP1, and FOS, were central regulators in the DEG network, and these genes were also suppressed under high-altitude stress. As a post-transcriptional regulation mechanism, alternative splicing (AS) is ubiquitous in Tibetan sheep. High-altitude stress induced 917 differentially alternative splicing (DAS) events. High-altitude stress modulated DAS in an AS-type-specific manner: suppressing skipped exon events but increasing retained intron events. C2H2-type zinc finger transcription factors and RNA processing factors were mainly enriched in DAS. These findings revealed high-altitude stress repressed ovarian development by suppressing the gene expression of LH/FSH hormone signaling genes and inducing intron retention of C2H2-type zinc finger transcription factors.
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Affiliation(s)
- Wenhao Li
- Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, China
| | - Weike Zeng
- College of Forestry, School of Future Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xiayang Jin
- Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, China
| | - Huiming Xu
- College of Forestry, School of Future Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Xingyan Fang
- College of Forestry, School of Future Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
- College of Life Sciences, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Zhijie Ma
- Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, China
| | - Gangjian Cao
- College of Forestry, School of Future Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
| | - Ruizhe Li
- Academy of Animal Science and Veterinary Medicine, Qinghai University, Xining 810016, China
| | - Liuyin Ma
- College of Forestry, School of Future Technology, Fujian Agriculture and Forestry University, Fuzhou 350002, China
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Zhuang Z, Zhang Y, Yang X, Yu T, Zhang Y, Sun K, Zhang Y, Cheng F, Zhang L, Wang H. Matrix stiffness regulates the immunomodulatory effects of mesenchymal stem cells on macrophages via AP1/TSG-6 signaling pathways. Acta Biomater 2022; 149:69-81. [PMID: 35820593 DOI: 10.1016/j.actbio.2022.07.010] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2022] [Revised: 07/05/2022] [Accepted: 07/05/2022] [Indexed: 11/28/2022]
Abstract
It is well-recognized that the matrix stiffness as an important stem cell niche can mediate stem cell behavior such as attachment, proliferation and differentiation, but how matrix stiffness affects the immunomodulatory efficacy of stem cells has been little explored, which, however, is of significant importance in determining the outcomes of stem cell-based therapies and engineered tissue mimics. We herein studied the immunomodulatory efficacy of mesenchymal stem cells (MSCs) in response to matrix stiffness by the evaluation of macrophage polarization in vitro and inflammatory response in vivo by subcutaneous implantation of MSC-laden hydrogels. Remarkably, we found that soft matrix enabled MSCs to produce significantly higher levels of immunomodulatory factors compared to stiff matrix, and induced the presence of more anti-inflammatory macrophages in vitro and attenuated macrophages-mediated inflammatory response in vivo. More importantly, we revealed stiffness-mediated immunoregulatory effect of MSCs was mainly attributed to tumor necrosis factor-α-stimulated protein 6 (TSG-6), which was mechanosensitively regulated by the MAPK and Hippo signaling pathway and downstream AP1 complex, and which in turn exerted an effect on macrophages through CD44 receptor to inhibit NF-κB pathway. To conclude, our results for the first time identify TSG-6 as the key factor in regulating immunomodulatory efficacy of MSCs in mechanical response, and can be potentially utilized to empower stem cell-based therapy and tissue engineering strategy in regenerative medicine. STATEMENT OF SIGNIFICANCE: Matrix stiffness as an important stem cell niche can mediate stem cell behavior such as attachment and differentiation, but how matrix stiffness affects the immunomodulatory efficacy of stem cells has been little explored, which, however, is of significant importance in determining the outcomes of stem cell-based therapies and engineered tissue mimics. Our results for the first time identify TSG-6 as the key factor in regulating the immunomodulatory efficacy of MSCs in mechanical response, which was regulated by the MAPK and Hippo signaling pathways and downstream AP1 complex, and which in turn exerted an effect on macrophages through CD44 receptor to inhibit NF-κB pathway, and can be potentially utilized to empower stem cell-based therapy and tissue engineering strategy in regenerative medicine.
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Affiliation(s)
- Zhumei Zhuang
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Yang Zhang
- School of Stomatology, Health Science Center, Shenzhen University, Shenzhen, 518037, China; School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Xueying Yang
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Taozhao Yu
- School of Biomedical Engineering, Health Science Center, Shenzhen University, Shenzhen 518060, China
| | - Yue Zhang
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Kai Sun
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Yonggang Zhang
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Fang Cheng
- Key State Laboratory of Fine Chemicals, School of Chemical Engineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China
| | - Lijun Zhang
- Third People's Hospital of Dalian, Dalian Eye Hospital, No.40 Qianshan Road, Ganjingzi District, Dalian, 116024, China
| | - Huanan Wang
- Key State Laboratory of Fine Chemicals, School of Bioengineering, Dalian University of Technology, No.2 Linggong Road, High-tech District, Dalian, 116024, China.
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Pan Y, Wang M, Wang L, Zhang Q, Baloch AR, He H, Xu G, Soomro J, Cui Y, Yu S. Estrogen improves the development of yak (Bos grunniens) oocytes by targeting cumulus expansion and levels of oocyte-secreted factors during in vitro maturation. PLoS One 2020; 15:e0239151. [PMID: 32941516 PMCID: PMC7498018 DOI: 10.1371/journal.pone.0239151] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2020] [Accepted: 08/31/2020] [Indexed: 12/12/2022] Open
Abstract
The estrogen-signalling pathway is critical for normal follicular development; however, little is known about its importance during in vitro maturation (IVM) in large animals, particularly yaks (Bos grunniens). Through the present study, we aimed to determine the mechanisms underlying estrogen involvement in cumulus expansion and the subsequent development of cumulus-oocyte complexes (COCs). COCs were cultured in the maturation medium supplemented with different concentrations (10−6–10−3 mM) of 17β-estradiol (E2) or its receptor antagonist, fulvestrant, and quantitative reverse-transcription polymerase chain reaction (qRT-PCR) and western blot were performed to determine the expression of cumulus-expansion related factors and oocyte-secreted factors (OSFs). The cumulus expansion of COCs was observed using an inverted microscope, and COCs developmental ability were judged by the evaluation of cleavage and blastulation rates per inseminated oocytes by IVF, and the number of cells in the blastocyst. Cumulus expansion increased with 10−6–10−3 mM E2, but decreased with fulvestrant. HAS2, PTGS2, PTX3 and OSFs expression increased in the 10−6–10−3 mM E2 groups. Significantly higher cleavage and blastocyst rates were observed in the 10−4 mM E2 group than in the fulvestrant and 0 mM E2 groups. Moreover, in the 10−4 mM group, blastocysts at 7 days had higher cell counts than the other groups. In conclusion, the increase in cumulus expansion and subsequent oocyte development after the addition of E2 to IVM medium may have resulted from increased cumulus-expansion-related factor expression and OSF levels.
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Affiliation(s)
- Yangyang Pan
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Meng Wang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Libin Wang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Qian Zhang
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Abdul Rasheed Baloch
- National Center for International Research in Cell and Gene Therapy, Sino-British Research Centre for Molecular Oncology, Academy of Medical Sciences, Zhengzhou University, Zhengzhou, China
| | - Honghong He
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Gengquan Xu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Jamila Soomro
- Department of Veterinary Physiology and Biochemistry, Faculty of Animal Husbandry and Veterinary Sciences, Sindh Agriculture University, Tandojam, Pakistan
| | - Yan Cui
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
| | - Sijiu Yu
- Gansu Province Livestock Embryo Engineering Research Center, College of Veterinary Medicine, Gansu Agricultural University, Lanzhou, China
- * E-mail:
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Lundberg PS, Moskowitz GJ, Bellacose C, Demirel E, Trau HA, Duffy DM. Granulosa cell proliferation is inhibited by PGE2 in the primate ovulatory follicle. Anim Cells Syst (Seoul) 2020; 24:125-135. [PMID: 33209192 PMCID: PMC7651849 DOI: 10.1080/19768354.2020.1764385] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Prostaglandin E2 (PGE2) is a key paracrine mediator of ovulation. Few specific PGE2-regulated gene products have been identified, so we hypothesized that PGE2 may regulate the expression and/or activity of a network of proteins to promote ovulation. To test this concept, Ingenuity Pathway Analysis (IPA) was used to predict PGE2-regulated functionalities in the primate ovulatory follicle. Cynomolgus macaques underwent ovarian stimulation. Follicular granulosa cells were obtained before (0 h) or 36 h after an ovulatory dose of human chorionic gonadotropin (hCG), with ovulation anticipated 37–40 h after hCG. Granulosa cells were obtained from additional monkeys 36 h after treatment with hCG and the PTGS2 inhibitor celecoxib, which significantly reduced hCG-stimulated follicular prostaglandin synthesis. Granulosa cell RNA expression was determined by microarray and analyzed using IPA. No granulosa cell mRNAs were identified as being significantly up-regulated or down-regulated by hCG + celecoxib compared with hCG only. However, IPA predicted that prostaglandin depletion significantly regulated several functional pathways. Cell cycle/cell proliferation was selected for further study because decreased granulosa cell proliferation is known to be necessary for ovulation and formation of a fully-functional corpus luteum. Prospective in vivo and in vitro experiments confirmed the prediction that hCG-stimulated cessation of granulosa cell proliferation is mediated via PGE2. Our studies indicate that PGE2 provides critical regulation of granulosa cell proliferation through mechanisms that do not involve significant regulation of mRNA levels of key cell cycle regulators. Pathway analysis correctly predicted that PGE2 serves as a paracrine mediator of this important transition in ovarian structure and function.
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Affiliation(s)
- Patric S Lundberg
- Department of Microbiology and Medical Molecular Biology, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Gil J Moskowitz
- Department of Department of Computer Science, Old Dominion University, Norfolk, VA, USA
| | - Carmel Bellacose
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Esra Demirel
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Heidi A Trau
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
| | - Diane M Duffy
- Department of Physiological Sciences, Eastern Virginia Medical School, Norfolk, VA, USA
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Zou X, Lu T, Zhao Z, Liu G, Lian Z, Guo Y, Sun B, Liu D, Li Y. Comprehensive analysis of mRNAs and miRNAs in the ovarian follicles of uniparous and multiple goats at estrus phase. BMC Genomics 2020; 21:267. [PMID: 32228439 PMCID: PMC7106838 DOI: 10.1186/s12864-020-6671-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 03/13/2020] [Indexed: 12/13/2022] Open
Abstract
Background Fertility is an important economic trait in the production of meat goat, and follicular development plays an important role in fertility. Although many mRNAs and microRNAs (miRNAs) have been found to play critical roles in ovarian biological processes, the interaction between mRNAs and miRNAs in follicular development is not yet completely understood. In addition, less attention has been given to the study of single follicle (dominant or atretic follicle) in goats. This study aimed to identify mRNAs, miRNAs, and signaling pathways as well as their interaction networks in the ovarian follicles (large follicles and small follicles) of uniparous and multiple Chuanzhong black goats at estrus phase using RNA-sequencing (RNA-seq) technique. Results The results showed that there was a significant difference in the number of large follicles between uniparous and multiple goats (P < 0.05), but no difference in the number of small follicles was observed (P > 0.05). For the small follicles of uniparous and multiple goats at estrus phase, 289 differentially expressed mRNAs (DEmRNAs) and 16 DEmiRNAs were identified; and for the large follicles, 195 DEmRNAs and 7 DEmiRNAs were identified. The functional enrichment analysis showed that DE genes in small follicles were significantly enriched in ovarian steroidogenesis and steroid hormone biosynthesis, while in large follicles were significantly enriched in ABC transporters and steroid hormone biosynthesis. The results of quantitative real-time polymerase chain reaction were consistent with those of RNA-seq. Analysis of the mRNA-miRNA interaction network suggested that CD36 (miR-122, miR-200a, miR-141), TNFAIP6 (miR-141, miR-200a, miR-182), CYP11A1 (miR-122), SERPINA5 (miR-1, miR-206, miR-133a-3p, miR-133b), and PTGFR (miR-182, miR-122) might be related to fertility, but requires further research on follicular somatic cells. Conclusions This study was used for the first time to reveal the DEmRNAs and DEmiRNAs as well as their interaction in the follicles of uniparous and multiple goats at estrus phase using RNA-seq technology. Our findings provide new clues to uncover the molecular mechanisms and signaling networks of goat reproduction that could be potentially used to increase ovulation rate and kidding rate in goat.
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Affiliation(s)
- Xian Zou
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China.,State Key Laboratory of Livestock and Poultry Breeding, Guangdong Key Laboratory of Animal Breeding and Nutrition, Guangdong Public Laboratory of Animal Breeding and Nutrition, Institute of Animal Science, Guangdong Academy of Agricultural Sciences, Guangzhou, 510640, China
| | - Tingting Lu
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Zhifeng Zhao
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Guangbin Liu
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Zhiquan Lian
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Yongqing Guo
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Baoli Sun
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Dewu Liu
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China
| | - Yaokun Li
- College of Animal Science, South China Agricultural University, Wushan Rd., Tianhe Dist, Guangzhou, 510642, Guangdong Province, China.
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Warma A, Ndiaye K. Functional effects of Tribbles homolog 2 in bovine ovarian granulosa cells†. Biol Reprod 2020; 102:1177-1190. [PMID: 32159216 DOI: 10.1093/biolre/ioaa030] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2019] [Revised: 12/12/2019] [Accepted: 03/07/2020] [Indexed: 12/19/2022] Open
Abstract
Tribbles homologs (TRIB) 1, 2, and 3 represent atypical members of the serine/threonine kinase superfamily. We previously identified TRIB2 as a differentially expressed gene in granulosa cells (GCs) of bovine preovulatory follicles. The current study aimed to further investigate TRIB2 regulation and study its function in the ovary. GCs were collected from follicles at different developmental stages: small antral follicles (SF), dominant follicles (DF) at day 5 of the estrous cycle, and hCG-induced ovulatory follicles (OFs). RT-qPCR analyses showed greater expression of TRIB2 in GC of DF as compared to OF and a significant downregulation of TRIB2 steady-state mRNA amounts by hCG/LH, starting at 6 h through 24 h post-hCG as compared to 0 h. Specific anti-TRIB2 polyclonal antibodies were generated and western blot analysis confirmed TRIB2 downregulation by hCG at the protein level. In vitro studies showed that FSH stimulates TRIB2 expression in GC. Inhibition of TRIB2 using CRISPR/Cas9 resulted in a significant increase in PCNA expression and an increase in steroidogenic enzyme CYP19A1 expression, while TRIB2 overexpression tended to decrease GC proliferation. TRIB2 inhibition also resulted in a decrease in transcription factors connective tissue growth factor (CTGF) and ankyrin repeat domain-containing protein 1 (ANKRD1) expression, while TRIB2 overexpression increased CTGF and ANKRD1. Additionally, western blot analyses showed reduction in ERK1/2 (MAPK3/1) and p38MAPK (MAPK14) phosphorylation levels following TRIB2 inhibition, while TRIB2 overexpression increased p-ERK1/2 and p-p38MAPK. These results provide evidence that TRIB2 modulates MAPK signaling in GC and that TRIB2 could act as a regulator of GC proliferation and function, which could affect steroidogenesis during follicular development.
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Affiliation(s)
- Aly Warma
- Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Centre de Recherche en Reproduction et Fertilité (CRRF), Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Kalidou Ndiaye
- Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Centre de Recherche en Reproduction et Fertilité (CRRF), Université de Montréal, St-Hyacinthe, Québec, Canada
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7
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Gonadotropin regulation of ankyrin-repeat and SOCS-box protein 9 (ASB9) in ovarian follicles and identification of binding partners. PLoS One 2019; 14:e0212571. [PMID: 30811458 PMCID: PMC6392328 DOI: 10.1371/journal.pone.0212571] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2018] [Accepted: 02/05/2019] [Indexed: 11/23/2022] Open
Abstract
Ankyrin-repeat and SOCS-box protein 9 (ASB9) is a member of the large SOCS-box containing proteins family and acts as the specific substrate recognition component of E3 ubiquitin ligases in the process of ubiquitination and proteasomal degradation. We previously identified ASB9 as a differentially expressed gene in granulosa cells (GC) of bovine ovulatory follicles. This study aimed to further investigate ASB9 mRNA and protein regulation, identify binding partners in GC of bovine ovulatory follicles, and study its function. GC were obtained from small follicles (SF: 2–4 mm), dominant follicles at day 5 of the estrous cycle (DF), and ovulatory follicles, 24 hours following hCG injection (OF). Analyses by RT-PCR showed a 104-fold greater expression of ASB9 in GC of OF than in DF. Steady-state levels of ASB9 in follicular walls (granulosa and theca cells) analyzed at 0, 6, 12, 18 and 24 hours after hCG injection showed a significant induction of ASB9 expression at 12 and 18 hours, reaching a maximum induction of 10.2-fold at 24 hours post-hCG as compared to 0 hour. These results were confirmed in western blot analysis showing strongest ASB9 protein amounts in OF. Yeast two-hybrid screening of OF-cDNAs library resulted in the identification of 10 potential ASB9 binding partners in GC but no interaction was found between ASB9 and creatine kinase B (CKB) in these GC. Functional studies using CRISPR-Cas9 approach revealed that ASB9 inhibition led to increased GC proliferation and modulation of target genes expression. Overall, these results support a physiologically relevant role of ASB9 in the ovulatory follicle by targeting specific proteins likely for degradation, contributing to reduced GC proliferation, and could be involved in the final GC differentiation into luteal cells.
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Schuermann Y, Rovani MT, Gasperin B, Ferreira R, Ferst J, Madogwe E, Gonçalves PB, Bordignon V, Duggavathi R. ERK1/2-dependent gene expression in the bovine ovulating follicle. Sci Rep 2018; 8:16170. [PMID: 30385793 PMCID: PMC6212447 DOI: 10.1038/s41598-018-34015-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2018] [Accepted: 09/30/2018] [Indexed: 02/06/2023] Open
Abstract
Ovulation is triggered by gonadotropin surge-induced signaling cascades. To study the role of extracellular signal-regulated kinase 1/2 (ERK1/2) in bovine ovulation, we administered the pharmacological inhibitor, PD0325901, into the preovulatory dominant follicle by intrafollicular injection. Four of five cows treated with 50 µM PD0325901 failed to ovulate. To uncover the molecular basis of anovulation in ERK1/2-inhibited cows, we collected granulosa and theca cells from Vehicle and PD0325901 treated follicles. Next-generation sequencing of granulosa cell RNA revealed 285 differentially expressed genes between Vehicle and PD0325901-treated granulosa cells at 6 h post-GnRH. Multiple inflammation-related pathways were enriched among the differentially expressed genes. The ERK1/2 dependent LH-induced genes in granulosa cells included EGR1, ADAMTS1, STAT3 and TNFAIP6. Surprisingly, PD0325901 treatment did not affect STAR expression in granulosa cells at 6 h post-GnRH. Granulosa cells had higher STAR protein and theca cells had higher levels of STAR mRNA in ERK1/2-inhibited follicles. Further, both granulosa and theca cells of ERK1/2-inhibited follicles had higher expression of SLC16A1, a monocarboxylate transporter, transporting substances including β-hydroxybutyrate across the plasma membrane. Taken together, ERK1/2 plays a significant role in mediating LH surge-induced gene expression in granulosa and theca cells of the ovulating follicle in cattle.
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Affiliation(s)
- Yasmin Schuermann
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Monique T Rovani
- Laboratory of Biotechnology and Animal Reproduction, BioRep, Veterinary Hospital, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Bernardo Gasperin
- Laboratory of Animal Reproduction-ReproPEL, Federal University of Pelotas, 96010-610, Capão do Leão, Brazil
| | - Rogério Ferreira
- Department of Animal Science, Santa Catarina State University, Santa Catarina, 88040-900, Brazil
| | - Juliana Ferst
- Laboratory of Biotechnology and Animal Reproduction, BioRep, Veterinary Hospital, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Ejimedo Madogwe
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Paulo B Gonçalves
- Laboratory of Biotechnology and Animal Reproduction, BioRep, Veterinary Hospital, Federal University of Santa Maria, Santa Maria, 97105-900, Brazil
| | - Vilceu Bordignon
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada
| | - Raj Duggavathi
- Department of Animal Science, McGill University, Sainte-Anne-de-Bellevue, QC, H9X 3V9, Canada.
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9
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Lussier JG, Diouf MN, Lévesque V, Sirois J, Ndiaye K. Gene expression profiling of upregulated mRNAs in granulosa cells of bovine ovulatory follicles following stimulation with hCG. Reprod Biol Endocrinol 2017; 15:88. [PMID: 29100496 PMCID: PMC5670713 DOI: 10.1186/s12958-017-0306-x] [Citation(s) in RCA: 31] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/12/2017] [Accepted: 10/16/2017] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Ovulation and luteinization of follicles are complex biological processes initiated by the preovulatory luteinizing hormone surge. The objective of this study was to identify genes that are differentially expressed in bovine granulosa cells (GC) of ovulatory follicles. METHODS Granulosa cells were collected during the first follicular wave of the bovine estrous cycle from dominant follicles (DF) and from ovulatory follicles (OF) obtained 24 h following injection of human chorionic gonadotropin (hCG). A granulosa cell subtracted cDNA library (OF-DF) was generated using suppression subtractive hybridization and screened. RESULTS Detection of genes known to be upregulated in bovine GC during ovulation, such as ADAMTS1, CAV1, EGR1, MMP1, PLAT, PLA2G4A, PTGES, PTGS2, RGS2, TIMP1, TNFAIP6 and VNN2 validated the physiological model and analytical techniques used. For a subset of genes that were identified for the first time, gene expression profiles were further compared by semiquantitative RT-PCR in follicles obtained at different developmental stages. Results confirmed an induction or upregulation of the respective mRNAs in GC of OF 24 h after hCG-injection compared with those of DF for the following genes: ADAMTS9, ARAF, CAPN2, CRISPLD2, FKBP5, GFPT2, KIT, KITLG, L3MBLT3, MRO, NUDT10, NUDT11, P4HA3, POSTN, PSAP, RBP1, SAT1, SDC4, TIMP2, TNC and USP53. In bovine GC, CRISPLD2 and POSTN mRNA were found as full-length transcript whereas L3MBLT3 mRNA was alternatively spliced resulting in a truncated protein missing the carboxy-terminal end amino acids, 774KNSHNEL780. Conversely, L3MBLT3 is expressed as a full-length mRNA in a bovine endometrial cell line. The 774KNSHNEL780 sequence is well conserved in all mammalian species and follows a SAM domain known to confer protein/protein interactions, which suggest a key function for these amino acids in the epigenetic control of gene expression. CONCLUSIONS We conclude that we have identified novel genes that are upregulated by hCG in bovine GC of OF, thereby providing novel insight into peri-ovulatory regulation of genes that contribute to ovulation and/or luteinization processes.
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Affiliation(s)
- Jacques G Lussier
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada.
| | - Mame N Diouf
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada
- Institut Sénégalais de Recherches Agricoles (ISRA) Laboratoire National de l'Elevage et de Recherches Vétérinaires (LNERV), BP 2057, Dakar-Hann, Sénégal
| | - Valérie Lévesque
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada
| | - Jean Sirois
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada
| | - Kalidou Ndiaye
- Centre de recherche en reproduction et fertilité, Faculté de médecine vétérinaire, Université de Montréal, 3200 Sicotte, St-Hyacinthe, Québec, J2S 2M2, Canada
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10
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Mazzoni G, Salleh SM, Freude K, Pedersen HS, Stroebech L, Callesen H, Hyttel P, Kadarmideen HN. Identification of potential biomarkers in donor cows for in vitro embryo production by granulosa cell transcriptomics. PLoS One 2017; 12:e0175464. [PMID: 28403200 PMCID: PMC5389837 DOI: 10.1371/journal.pone.0175464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/27/2017] [Indexed: 11/30/2022] Open
Abstract
The Ovum Pick Up-In vitro Production (OPU-IVP) of embryos is an advanced reproductive technology used in cattle production but the complex biological mechanisms behind IVP outcomes are not fully understood. In this study we sequenced RNA of granulosa cells collected from Holstein cows at oocyte aspiration prior to IVP, to identify candidate genes and biological mechanisms for favourable IVP-related traits in donor cows where IVP was performed separately for each animal. We identified 56 genes significantly associated with IVP scores (BL rate, kinetic and morphology). Among these, BEX2, HEY2, RGN, TNFAIP6 and TXNDC11 were negatively associated while Mx1 and STC1 were positively associated with all IVP scores. Functional analysis highlighted a wide range of biological mechanisms including apoptosis, cell development and proliferation and four key upstream regulators (COX2, IL1, PRL, TRIM24) involved in these mechanisms. We found a range of evidence that good IVP outcome is positively correlated with early follicular atresia. Furthermore we showed that high genetic index bulls can be used in breeding without reducing the IVP performances. These findings can contribute to the development of biomarkers from follicular fluid content and to improving Genomic Selection (GS) methods that utilize functional information in cattle breeding, allowing a widespread large scale application of GS-IVP.
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Affiliation(s)
- Gianluca Mazzoni
- Animal Breeding, Quantitative Genetics & Systems Biology (AQS) Group, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Suraya M. Salleh
- Animal Breeding, Quantitative Genetics & Systems Biology (AQS) Group, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Kristine Freude
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | | - Lotte Stroebech
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
- EmbryoTrans Biotech A/S, Haslev, Denmark
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Poul Hyttel
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Haja N. Kadarmideen
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
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11
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Sayasith K, Sirois J. Molecular characterization of a disintegrin and metalloprotease-17 (ADAM17) in granulosa cells of bovine preovulatory follicles. Mol Cell Endocrinol 2015; 411:49-57. [PMID: 25917455 DOI: 10.1016/j.mce.2015.04.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/05/2015] [Revised: 04/09/2015] [Accepted: 04/13/2015] [Indexed: 11/29/2022]
Abstract
A disintegrin and metalloprotease-17 (ADAM17) is thought to play a key role in the release of soluble and active epiregulin (EREG) and amphiregulin (AREG) in ovarian follicles but its transcriptional regulation in follicular cells remains largely unknown. The objectives of this study were to characterize the regulation of ADAM17 transcripts in bovine follicles prior to ovulation and to investigate its transcriptional control in bovine granulosa cells. To study the regulation of ADAM17 transcripts, RT-PCR analyses were performed using total RNA extracted from bovine follicles collected between 0 h and 24 h post-hCG. Results showed that levels of ADAM17 mRNA were low prior to hCG (0 h), markedly and transiently increased 6-12 h post-hCG (P <0.05), and returned to low baseline levels at 24 h post-hCG in granulosa and theca interna cells of preovulatory follicles. To determine the transcriptional control of ADAM17 expression, primary cultures of bovine granulosa cells were used. Forskolin (FSK) stimulation induced a pattern of ADAM17 mRNA up-regulation in vitro similar to that observed by hCG in vivo. 5'-Deletion mutagenesis studies identified a minimal region of the bovine ADAM17 promoter containing basal and FSK-inducible activities, which were dependent on the presence of a consensus AP1 cis-element. Electrophoretic mobility shift assays revealed an interaction between AP1 and the trans-acting factor Fra2. Chromatin immunoprecipitation assays confirmed an endogenous interaction between Fra2 and the ADAM17 promoter in granulosa cell cultures. FSK-inducible ADAM17 promoter activity and mRNA expression were suppressed by PKA and ERK1/2 inhibitors but not by a p38MAPK inhibitor, pointing to the importance of PKA and ERK1/2 signaling pathways in the up-regulation of bovine ADAM17 mRNA. Collectively, these findings describe the gonadotropin/FSK-dependent up-regulation of ADAM17 transcripts in bovine preovulatory follicles and unravel for the first time some of the molecular mechanisms involved in ADAM17 gene expression in granulosa cells of a monoovulatory species.
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Affiliation(s)
- Khampoun Sayasith
- Centre de Recherche en Reproduction Animale, Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada.
| | - Jean Sirois
- Centre de Recherche en Reproduction Animale, Département de Biomédecine Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada
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12
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Sayasith K, Sirois J. Expression and regulation of stromal cell-derived factor-1 (SDF1) and chemokine CXC motif receptor 4 (CXCR4) in equine and bovine preovulatory follicles. Mol Cell Endocrinol 2014; 391:10-21. [PMID: 24784705 DOI: 10.1016/j.mce.2014.04.009] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2014] [Revised: 04/15/2014] [Accepted: 04/17/2014] [Indexed: 12/12/2022]
Abstract
The interaction between stromal cell-derived factor-1 (SDF1) and chemokine CXC motif receptor 4 (CXCR4) has been implicated in leukocyte attraction, tissue remodeling and angiogenesis. The objective of the present study was to characterize the expression and regulation of SDF1 and CXCR4 in equine follicles during the ovulatory process. Equine preovulatory follicles were isolated during estrus 0-39h after hCG treatment. Follicle wall preparations (theca interna with attached granulosa cells) and isolated preparations of granulosa cells and theca interna were obtained, and total RNA extracts were analyzed by RT-PCR/Southern blot. Results showed that levels of CXCR4 transcripts were induced by hCG in follicles at 36 h post-hCG (P<0.05 vs 0 h), with the induction observed in both granulosa and theca cells. Immunoblotting and immunohistochemical analyses confirmed an increase in CXCR4 protein in follicles after hCG treatment. In contrast, levels of SDF1 transcripts were very low in granulosa cells but high in theca interna cells throughout most of the ovulatory period. Studies in vivo performed with bovine preovulatory follicles collected 0-24h post-hCG revealed a marked and significant up-regulation of CXCR4 transcripts after hCG (P<0.05), as observed in equine follicles. A similar pattern of CXCR4 mRNA up-regulation was observed in cultures of bovine granulosa cells treated with forskolin (P<0.05). This forskolin-dependent induction of CXCR4 mRNA was suppressed by co-treatment with inhibitors of PKA, ERK1/2 and EGFR, and by the progesterone receptor antagonist RU486 (P<0.05), underscoring the contribution of multiple signaling pathways. In complementary studies, treatment of bovine granulosa cells with EGF or the hypoxia mimetic cobalt chloride significantly increased CXCR4 transcript levels, whereas co-treatment with forskolin and a CXCR4 antagonist repressed the expression of several ovulation-related genes. Collectively, this study describes for the first time the gonadotropin-dependent up-regulation of CXCR4 transcript in ovarian follicles of large monoovulatory species, provides some insights into the regulation of CXCR4 gene expression in granulosa cells, and identifies a potential link between follicular SDF1/CXCR4 activation and the regulation of ovulation-related genes.
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Affiliation(s)
- Khampoun Sayasith
- Centre de Recherche en Reproduction Animale, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada; Département de Biomédecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada; Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada.
| | - Jean Sirois
- Centre de Recherche en Reproduction Animale, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada; Département de Biomédecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada; Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada
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13
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Sayasith K, Lussier J, Sirois J. Molecular characterization and transcriptional regulation of a disintegrin and metalloproteinase with thrombospondin motif 1 (ADAMTS1) in bovine preovulatory follicles. Endocrinology 2013; 154:2857-69. [PMID: 23751874 DOI: 10.1210/en.2013-1140] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
The ovulatory process involves a complex remodeling of the extracellular matrix during which a desintegrin and metalloproteinase with thrombospondin motif 1 (ADAMTS1) is thought to play a key role, but its transcriptional regulation in bovine follicles remains largely unknown. The objectives of this study were to characterize the regulation of ADAMTS1 in bovine follicles before ovulation and to determine its transcriptional control in bovine granulosa cells. Regulation of ADAMTS1 was assessed using total RNA isolated from bovine preovulatory follicles obtained at various times after human chorionic gonadotropin treatment. Results from RT-PCR analyses showed that levels of ADAMTS1 mRNA were very low at 0 hours but increased at 6 to 24 hours after human chorionic gonadotropin in granulosa cells. To determine the regulatory mechanisms controlling ADAMTS1 gene expression in vitro, primary cultures of bovine granulosa cells were established, and treatment with forskolin up-regulated ADAMTS1 mRNA levels. Promoter activity assays, 5'-deletion, and site-directed mutagenesis identified a minimal region conferring full-length basal and forskolin-stimulated ADAMTS1 promoter activities, with both being dependent on Ebox cis-acting elements. EMSAs revealed upstream stimulating factor (USF) proteins as key trans-activating factors interacting with Ebox. Chromatin immunoprecipitation assays confirmed such interactions between USF and Ebox in vivo, and USF binding to Ebox elements was increased by forskolin treatment. ADAMTS1 promoter activity and mRNA expression were increased by forskolin and overexpression of the catalytic subunit of protein kinase A, but not by cotreatment with inhibitors of protein kinase A, ERK1/2, and epidermal growth factor receptor signaling pathways. Furthermore, treatment with a soluble epidermal growth factor induced ADAMTS1 mRNA expression in granulosa cells. Collectively, results from this study describe the gonadotropin/forskolin-dependent up-regulation of ADAMTS1 mRNA in granulosa cells of bovine preovulatory follicles in vivo and in vitro and identify for the first time some of the molecular mechanisms responsible for ADAMTS1 promoter activation in follicular cells of a large monoovulatory species.
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Affiliation(s)
- Khampoun Sayasith
- Centre de Recherche en Reproduction Animale and the Département de Biomédecine, Vétérinaire, Faculté de Médecine Vétérinaire, Université de Montréal, Saint-Hyacinthe, Québec J2S 7C6, Canada.
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14
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Qu F, Wang FF, Yin R, Ding GL, El-Prince M, Gao Q, Shi BW, Pan HH, Huang YT, Jin M, Leung PCK, Sheng JZ, Huang HF. A molecular mechanism underlying ovarian dysfunction of polycystic ovary syndrome: hyperandrogenism induces epigenetic alterations in the granulosa cells. J Mol Med (Berl) 2012; 90:911-23. [PMID: 22349439 DOI: 10.1007/s00109-012-0881-4] [Citation(s) in RCA: 95] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2011] [Revised: 01/17/2012] [Accepted: 01/19/2012] [Indexed: 01/20/2023]
Abstract
The objective of this study was to explore whether hyperandrogenism induces epigenetic alterations of peroxisome proliferator-activated receptor gamma 1 (PPARG1), nuclear corepressor 1 (NCOR1), and histone deacetylase 3 (HDAC3) genes in granulosa cells (GCs) of polycystic ovary syndrome (PCOS) women and whether these alterations are involved in the ovarian dysfunction induced by hyperandrogenism. Thirty-two infertile PCOS women and 147 infertile women with tubal blockage were recruited. PCOS women were divided into the hyperandrogenism (HA) PCOS group (n = 13) and nonhyperandrogenism (N-HA) PCOS group (n = 19). Sixty female Sprague-Dawley rats were used for PCOS model establishment. In GCs of HA PCOS women, PPARG1 mRNA expression was lower, whereas NCOR1 and HDAC3 mRNA expression were higher than N-HA PCOS women and controls (P < 0.05). When all women were divided into successful and failed pregnancy subgroups according to the following clinical pregnancy outcome, we found lower PPARG1 mRNA levels and higher NCOR1 and HDAC3 mRNA levels in the failed subgroup of HA PCOS (P < 0.05). Two hypermethylated CpG sites in the PPARG1 promoter and five hypomethylated CpG sites in the NCOR1 promoter were observed only in HA PCOS women (P < 0.01 to P < 0.0005). The acetylation levels of histone H3 at lysine 9 and p21 mRNA expression were decreased in human GCs treated with dihydrotestosterone in vitro (P < 0.05). PCOS rat models also showed alterations of PPARG1, NCOR1, and HDAC3 mRNA expression and methylation changes of PPARG1 and NCOR1, consistent with the results from humans. Hyperandrogenism induces the epigenetic alterations of PPARG1, NCOR1, and HDAC3 in GCs, which are involved in the ovarian dysfunction of HA PCOS.
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Affiliation(s)
- Fan Qu
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, Zhejiang 310006, China
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15
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Shimada M, Yamashita Y. The Key Signaling Cascades in Granulosa Cells During Follicular Development and Ovulation Process. ACTA ACUST UNITED AC 2011. [DOI: 10.1274/jmor.28.25] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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16
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Assidi M, Montag M, Van der Ven K, Sirard MA. Biomarkers of human oocyte developmental competence expressed in cumulus cells before ICSI: a preliminary study. J Assist Reprod Genet 2010; 28:173-88. [PMID: 20953827 DOI: 10.1007/s10815-010-9491-7] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2010] [Accepted: 09/28/2010] [Indexed: 02/06/2023] Open
Abstract
PURPOSE To identify reliable genomic biomarkers expressed in cumulus cells that accurately and non-invasively predict the oocyte developmental competence and reinforce the already used morphological criteria. METHODS Eight consenting patients were selected for ovarian stimulation and ICSI procedures. Cumulus-oocyte complexes were transvaginally punctured and individually selected based on both good morphological criteria and high zona pellucida birefringence. Following ICSI, two 3-day embryos per patient were transferred. Pregnancy outcome was recorded and proven implantation was thereafter confirmed. Differential gene expression was assessed using two microarray platforms. Further real-time PCR validation, Ingenuity pathways analysis and intra-patient analysis were performed on 17 selected candidates. RESULTS Seven genes were differentially (p ≤ 0.05) associated to successful pregnancy and implantation. These biomarkers could be used to predict the oocyte developmental competence. CONCLUSIONS These genomic markers are a powerful reinforcement of morphological approaches of oocyte selection. Their large-scale validation could increase pregnancy outcome and single embryo transfer efficiency.
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Affiliation(s)
- Mourad Assidi
- Centre de recherche en biologie de la reproduction, Département des Sciences Animales, Laval University, Ste-Foy, Québec, Canada, G1K 7P4
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17
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Assidi M, Dieleman SJ, Sirard MA. Cumulus cell gene expression following the LH surge in bovine preovulatory follicles: potential early markers of oocyte competence. Reproduction 2010; 140:835-52. [PMID: 20724459 DOI: 10.1530/rep-10-0248] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Cumulus cells (CCs) are essential for oocytes to reach full development competency and become fertilized. Many major functional properties of CCs are triggered by gonadotropins and governed by the oocyte. Consequently, cumulus may reflect oocyte quality and is often used for oocyte selection. The most visible function of CCs is their ability for rapid extracellular matrix expansion after the LH surge. Although unexplained, LH induces the final maturation and improves oocyte quality. To study the LH signaling and gene expression cascade patterns close to the germinal vesicle breakdown, bovine CCs collected at 2 h before and 6 h after the LH surge were hybridized to a custom-made microarray to better understand the LH genomic action and find differentially expressed genes associated with the LH-induced oocyte final maturation. Functional genomic analysis of the 141 overexpressed and 161 underexpressed clones was performed according to their molecular functions, gene networks, and cell compartments. Following real-time PCR validation of our gene lists, some interesting pathways associated with the LH genomic action on CCs and their possible roles in oocyte final maturation, ovulation, and fertilization are discussed. A list of early potential markers of oocyte competency in vivo and in vitro is thereafter suggested. These early biomarkers are a preamble to understand the LH molecular pathways that trigger the final oocyte competence acquisition process in bovine.
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Affiliation(s)
- Mourad Assidi
- Centre de Recherche en Biologie de la Reproduction, Université Laval, Québec, Québec, G1K 7P4, Canada
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18
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Qu F, Wang FF, Lu XE, Dong MY, Sheng JZ, Lv PP, Ding GL, Shi BW, Zhang D, Huang HF. Altered aquaporin expression in women with polycystic ovary syndrome: hyperandrogenism in follicular fluid inhibits aquaporin-9 in granulosa cells through the phosphatidylinositol 3-kinase pathway. Hum Reprod 2010; 25:1441-50. [DOI: 10.1093/humrep/deq078] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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