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Bi J, Zhou W, Tang Z. Pathogenesis of diabetic complications: Exploring hypoxic niche formation and HIF-1α activation. Biomed Pharmacother 2024; 172:116202. [PMID: 38330707 DOI: 10.1016/j.biopha.2024.116202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Revised: 01/11/2024] [Accepted: 01/22/2024] [Indexed: 02/10/2024] Open
Abstract
Hypoxia is a common feature of diabetic tissues, which highly correlates to the progression of diabetes. The formation of hypoxic context is induced by disrupted oxygen homeostasis that is predominantly driven by vascular remodeling in diabetes. While different types of vascular impairments have been reported, the specific features and underlying mechanisms are yet to be fully understood. Under hypoxic condition, cells upregulate hypoxia-inducible factor-1α (HIF-1α), an oxygen sensor that coordinates oxygen concentration and cell metabolism under hypoxic conditions. However, diabetic context exploits this machinery for pathogenic functions. Although HIF-1α protects cells from diabetic insult in multiple tissues, it also jeopardizes cell function in the retina. To gain a deeper understanding of hypoxia in diabetic complications, we focus on the formation of tissue hypoxia and the outcomes of HIF-1α dysregulation under diabetic context. Hopefully, this review can provide a better understanding on hypoxia biology in diabetes.
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Affiliation(s)
- Jingjing Bi
- Basic Medicine Research Innovation Center for cardiometabolic diseases, Ministry of Education,Southwest Medical University, Ministry of Education, Southwest Medical University, Luzhou, China
| | - Wenhao Zhou
- Yucebio Technology Co., Ltd., Shenzhen, China
| | - Zonghao Tang
- Basic Medicine Research Innovation Center for cardiometabolic diseases, Ministry of Education,Southwest Medical University, Ministry of Education, Southwest Medical University, Luzhou, China; Baylor College of Medicine, Department of Molecular and Cellular Biology, Houston, TX, USA.
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Höfner M, Eubler K, Herrmann C, Berg U, Berg D, Welter H, Imhof A, Forné I, Mayerhofer A. Reduced oxygen concentrations regulate the phenotype and function of human granulosa cells in vitro and cause a diminished steroidogenic but increased inflammatory cellular reaction. Mol Hum Reprod 2023; 30:gaad049. [PMID: 38128016 DOI: 10.1093/molehr/gaad049] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2023] [Revised: 12/13/2023] [Indexed: 12/23/2023] Open
Abstract
Oxygen (O2) concentrations have recently been discussed as important regulators of ovarian cells. Human IVF-derived granulosa cells (human GCs) can be maintained in vitro and are a widely used cellular model for the human ovary. Typically, GCs are cultured at atmospheric O2 levels (approximately around 20%), yet the O2 conditions in vivo, especially in the preovulatory follicle, are estimated to be much lower. Therefore, we comprehensively evaluated the consequences of atmospheric versus hypoxic (1% O2) conditions for 4 days on human GCs. We found lower cellular RNA and protein levels but unchanged cell numbers at 1% O2, indicating reduced transcriptional and/or translational activity. A proteomic analysis showed that 391 proteins were indeed decreased, yet 133 proteins were increased under hypoxic conditions. According to gene ontology (GO) enrichment analysis, pathways associated with metabolic processes, for example amino acid-catabolic-processes, mitochondrial protein biosynthesis, and steroid biosynthesis, were downregulated. Pathways associated with glycolysis, chemical homeostasis, cellular response to hypoxia, and actin filament bundle assembly were upregulated. In accordance with lower CYP11A1 (a cholesterol side-chain cleavage enzyme) levels, progesterone release was decreased. A proteome profiler, as well as IL-6 and IL-8 ELISA assays, revealed that hypoxia led to increased secretion of pro-inflammatory and angiogenic factors. Immunofluorescence studies showed nuclear localization of hypoxia-inducible factor 1α (HIF1α) in human GCs upon acute (2 h) exposure to 1% O2 but not in cells exposed to 1% O2 for 4 days. Hence, the role of HIF1α may be restricted to initiation of the hypoxic response in human GCs. The results provide a detailed picture of hypoxia-induced phenotypic changes in human GCs and reveal that chronically low O2 conditions inhibit the steroidogenic but promote the inflammatory phenotype of these cells.
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Affiliation(s)
- Maria Höfner
- Cell Biology, Anatomy III, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilian-University (LMU), Planegg-Martinsried, Germany
| | - Katja Eubler
- Cell Biology, Anatomy III, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilian-University (LMU), Planegg-Martinsried, Germany
| | - Carola Herrmann
- Cell Biology, Anatomy III, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilian-University (LMU), Planegg-Martinsried, Germany
| | - Ulrike Berg
- Fertility Centre A.R.T., Bogenhausen, Munich, Germany
| | - Dieter Berg
- Fertility Centre A.R.T., Bogenhausen, Munich, Germany
| | - Harald Welter
- Cell Biology, Anatomy III, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilian-University (LMU), Planegg-Martinsried, Germany
| | - Axel Imhof
- Protein Analysis Unit, BMC, Faculty of Medicine, LMU, Planegg-Martinsried, Germany
| | - Ignasi Forné
- Protein Analysis Unit, BMC, Faculty of Medicine, LMU, Planegg-Martinsried, Germany
| | - Artur Mayerhofer
- Cell Biology, Anatomy III, Biomedical Center Munich (BMC), Faculty of Medicine, Ludwig-Maximilian-University (LMU), Planegg-Martinsried, Germany
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Barragán M, Cornet-Bartolomé D, Molina N, Vassena R. The expression levels of NOS2, HMOX1, and VEGFC in cumulus cells are markers of oocyte maturation and fertilization rate. Mol Reprod Dev 2023; 90:369-377. [PMID: 37486100 DOI: 10.1002/mrd.23698] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2022] [Revised: 04/30/2023] [Accepted: 07/12/2023] [Indexed: 07/25/2023]
Abstract
Throughout the reproductive life of women, cumulus cells (CC) protect the dormant oocyte from damage, act as sensors of the follicular microenvironment, and act as a gatekeeper for oocyte developmental potential. One such mechanism relies on the hypoxia-tolerance response, which, with age, decreases systematically, including in the ovary. We aimed to evaluate the association between gene expression related to hypoxia and aging in CC and reproductive results in in vitro fertilization cycles. We recruited 94 women undergoing controlled ovarian stimulation. Total RNA was extracted from pooled CCs collected after oocyte pick-up (OPU) and reverse-transcribed to complementary DNA using random hexamers to test 14 genes related to hypoxia response via HIF1α activation, oxidative stress, and angiogenic responses. The expression of CLU, NOS2, and TXNIP had a positive correlation with age (rs = 0.25, rs = 0.24, and rs = 0.35, respectively). Additionally, NOS2 and HMOX1 expression correlated positively with the retrieval of immature oocytes (rs = 0.22 and rs = 0.40, respectively). Moreover, VEGFC levels decreased overall with increasing fertilization rate, independently of age (rs = -0.29). We found that the fertilization potential of a cohort of oocytes is related to the ability of CC to respond to oxidative stress and hypoxia with age, pointing at NOS2, HMOX1, and VEGFC expression as markers for oocyte maturation and fertilization success.
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Affiliation(s)
- Montserrat Barragán
- EUGIN Group, Research and Development, Parc Científic de Barcelona, Barcelona, Spain
| | - David Cornet-Bartolomé
- EUGIN Group, Research and Development, Parc Científic de Barcelona, Barcelona, Spain
- Department of Genetics, Microbiology and Statistic, CIBERER, IBUB, IRSJD, Universitat de Barcelona, Barcelona, Spain
| | - Natalia Molina
- EUGIN Group, Research and Development, Parc Científic de Barcelona, Barcelona, Spain
- Universitat Pompeu Fabra, Barcelona, Spain
| | - Rita Vassena
- EUGIN Group, Research and Development, Parc Científic de Barcelona, Barcelona, Spain
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Ligusticum chuanxiong promotes the angiogenesis of preovulatory follicles (F1-F3) in late-phase laying hens. Poult Sci 2022; 102:102430. [PMID: 36621100 PMCID: PMC9841292 DOI: 10.1016/j.psj.2022.102430] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Revised: 12/08/2022] [Accepted: 12/13/2022] [Indexed: 12/23/2022] Open
Abstract
Ligusticum chuanxiong (CX) is a traditional Chinese medicine that is widely planted throughout the world. CX is one of the most important and commonly used drugs to enhance blood circulation. The preovulatory follicles in laying hens have a large number of blood arteries and meridians that feed the follicles' growth and maturation with nutrients, hormones, and cytokines. With the extension of laying time, preovulatory follicles angiogenesis decreased gradually. In this study, we studied the mechanism of CX on preovulatory follicles angiogenesis in late-phase laying hens. The results show that CX extract can increase the angiogenesis of preovulatory follicles (F1-F3) of late-phase laying hens. CX extract can promote vascular endothelial growth factor receptor 2 (VEGFR2) phosphorylation in preovulatory follicles theca layers, promote the proliferation, invasion and migration through PI3K/AKT and RAS/ERK signaling pathways in primary follicle microvascular endothelial-like cells (FMECs). In addition, CX extract can up-regulate the expression of hypoxia inducible factor α (HIF1α) in granulosa cells (GCs) and granulosa layers through PI3K/AKT and RAS/ERK signaling pathways, thereby promoting the secretion of vascular endothelial growth factor A (VEGFA). In conclusion, the current study confirmed the promoting effect of CX extract on the preovulatory follicles angiogenesis, which sets the stage for the design of functional animal feed for late-phase laying hens.
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Przygrodzka E, Myszczynski K, Klos J, Ziecik AJ. The Role of Reduced Oxygen Supply and Transcription Factors cJUN and CREB in Progesterone Production during the Corpus Luteum Rescue in Gilts. Animals (Basel) 2022; 12:ani12202855. [PMID: 36290240 PMCID: PMC9597779 DOI: 10.3390/ani12202855] [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: 08/28/2022] [Revised: 10/03/2022] [Accepted: 10/19/2022] [Indexed: 11/16/2022] Open
Abstract
The corpus luteum plays a fundamental role in regulating reproduction via progesterone production. Still, there is little data on factors regulating the maintenance of luteal function during early pregnancy in gilts. Previous studies emphasize the role of hypoxia and HIF-1 in the regulation of steroidogenic and angiogenic genes expression and progesterone production by ovarian cells. Using the corpus luteum of cyclic and early pregnant gilts we analyzed: (1) the in vitro effects of reduced oxygen tension on progesterone production and mRNA expression of HIF1A and luteal function regulators, STAR and VEGFA; (2) the ex vivo profiles of mRNA and protein expression of HIF-1α, STAR, VEGFA and transcription factors-cJUN and CREB, regulating STAR expression, in the corpus luteum of cyclic and pregnant gilts. The synthesis of progesterone was gradually inhibited in cyclic or pregnant gilt luteal tissue (on day 13 of cycle or pregnancy) incubated in a decreasing concentration−20%, 10%, and 3% of oxygen (O2). Luteal tissues of pregnant gilts produced trace amounts of progesterone in 10% O2, which was similar to cyclic gilts in 3% O2. HIF1A expression increased after 24 h of incubation in tissues of cyclic gilts in 3% vs. 20% O2 (p < 0.01), whereas levels of STAR and VEGFA increased significantly in cyclic and pregnant gilt tissues incubated in 10% and 3% vs. 20% O2. The ex vivo mRNA expression of HIF1A and VEGFA was elevated (p < 0.001) on day 14 vs. day 12 of pregnancy. The protein expression of HIF-1 and VEGFA increased (p < 0.001), whereas the level of STAR (mRNA and protein) and progesterone dropped (p < 0.001) on day 14 of the estrous cycle vs. a parallel day of pregnancy and/or day 12 of the estrous cycle. The content of phosphorylated cJUN and CREB was elevated (p < 0.01) in the luteal tissue on day 12 or 14 of pregnancy vs. parallel days of the estrous cycle. These increases of phosphorylated cJUN and CREB may be involved in STAR expression in the luteal tissue during early pregnancy in gilts.
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Sapuleni J, Szymanska M, Meidan R. Diverse actions of sirtuin-1 on ovulatory genes and cell death pathways in human granulosa cells. Reprod Biol Endocrinol 2022; 20:104. [PMID: 35840944 PMCID: PMC9284863 DOI: 10.1186/s12958-022-00970-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/03/2022] [Accepted: 06/22/2022] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Human granulosa-lutein cells (hGLCs) amply express sirtuin-1 (SIRT1), a NAD + -dependent deacetylase that is associated with various cellular functions. SIRT1 was shown to elevate cAMP on its own and additively with human chorionic gonadotropin (hCG), it is therefore interesting to examine if SIRT1 affects other essential hGLC functions. METHODS Primary hGLCs, obtained from the follicular aspirates of women undergoing IVF and SV40-transfected, immortalized hGLCs (SVOG cells), were used. Primary cells were treated with SIRT1 specific activator SRT2104, as well as hCG or their combination. Additionally, siRNA-targeting SIRT1 construct was used to silence endogenous SIRT1 in SVOG cells. PTGS2, EREG, VEGFA and FGF2 expression was determined using quantitative polymerase chain reaction (qPCR). Apoptotic and necroptotic proteins were determined by specific antibodies in western blotting. Cell viability/apoptosis was determined by the XTT and flow cytometry analyses. Data were analyzed using student t-test or Mann-Whitney U test or one-way ANOVA followed by Tukey HSD post hoc test. RESULTS In primary and immortalized hGLCs, SRT2104 significantly upregulated key ovulatory and angiogenic genes: PTGS2, EREG, FGF2 and VEGFA, these effects tended to be further augmented in the presence of hCG. Additionally, SRT2104 dose and time-dependently decreased viable cell numbers. Flow cytometry of Annexin V stained cells confirmed that SIRT1 reduced live cell numbers and increased late apoptotic and necrotic cells. Moreover, we found that SIRT1 markedly reduced anti-apoptotic BCL-XL and MCL1 protein levels and increased cleaved forms of pro-apoptotic proteins caspase-3 and PARP. SIRT1 also significantly induced necroptotic proteins RIPK1 and MLKL. RIPK1 inhibitor, necrostatin-1 mitigated SIRT1 actions on RIPK1 and MLKL but also on cleaved caspase-3 and PARP and in accordance on live and apoptotic cells, implying a role for RIPK1 in SIRT1-induced cell death. SIRT1 silencing produced inverse effects on sorted cell populations, anti-apoptotic, pro-apoptotic and necroptotic proteins, corroborating SIRT1 activation. CONCLUSIONS These findings reveal that in hGLCs, SIRT1 enhances the expression of ovulatory and angiogenic genes while eventually advancing cell death pathways. Interestingly, these seemingly contradictory events may have occurred in a cAMP-dependent manner.
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Affiliation(s)
- Jackson Sapuleni
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 761001, Rehovot, Israel
| | - Magdalena Szymanska
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 761001, Rehovot, Israel
- Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-748, Olsztyn, Poland
| | - Rina Meidan
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, 761001, Rehovot, Israel.
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Spatiotemporal expression pattern of miR-205, miR-26a-5p, miR-17-5p, let-7b-5p, and their target genes during different stages of corpus luteum in Egyptian buffaloes. J Genet Eng Biotechnol 2022; 20:37. [PMID: 35212793 PMCID: PMC8881532 DOI: 10.1186/s43141-022-00320-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2021] [Accepted: 02/17/2022] [Indexed: 12/22/2022]
Abstract
Background No doubt that the corpus luteum (CL) plays a vital role in the regulation of female cyclicity in mammals. The scenarios among microRNAs (miRNAs) and their target genes and steroid hormones {estradiol (E2) and progesterone (P4)} are required for better understanding the molecular regulation of CL during its formation, maturation, and regression. We aimed to (I) study the changes in the relative abundance of miR-205, miR-26a-5p, miR-17-5p, and let-7b-5p and their target genes: LHCGR, CASP3, PCNA, AMH, and PLA2G3, during different stages of corpus luteum in Egyptian buffaloes, and (II) and to address different scenarios between steroid concentrations in the serum and the expression pattern of selected miRNAs and their targets. Methods The paired ovaries and blood samples were collected from apparently healthy 50 buffalo cows at a private abattoir. The ovaries bearing CL were macroscopically divided according to their morphological structure and color into hemorrhagic (CLH), developing (CLD), mature (CLM), regressed (CLR), and albicans (CLA). Small pieces from different stages of CL (CLH, CLD, CLM, CLR, and CLA) were cut and immediately kept at − 80 °C for total RNA isolation and qRT-PCR. The serum was separated for steroid level estimation. Results The LHCGR was expressed during different stages of CL, and the peak of expression was at the mid-luteal stage. The CASP3 revealed a stage-specific response at different stages of CL. The PCNA has an essential role in cellular proliferation in buffaloes CL. Both expression patterns of PLA2G3 and AMH were found over the various developmental and regression stages. It was noticed that miR-205 is conserved to target LHCGR and CASP3 transcripts. Moreover, CASP3 and AMH were targeted via miR-26a-5p. Additionally, the CASP3 and PLA2G3 were targeted via let-7b-5p. The P4 level reached its peak during CLM. There were positive and negative strong correlations between miRNAs (miR-26a-5p and miR-205), target genes (LHCGR and CASP3) during different stages of CL, and steroid hormones in the serum. Conclusions Taken together, the orchestrated pattern among miRNAs, target genes, and steroid hormones is essential for maintaining the proper development and function of CL in buffalo cows. Supplementary Information The online version contains supplementary material available at 10.1186/s43141-022-00320-9.
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Nishigaki A, Tsubokura H, Tsuzuki-Nakao T, Okada H. Hypoxia: Role of SIRT1 and the protective effect of resveratrol in ovarian function. Reprod Med Biol 2021; 21:e12428. [PMID: 34934403 PMCID: PMC8656197 DOI: 10.1002/rmb2.12428] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2021] [Accepted: 11/09/2021] [Indexed: 12/27/2022] Open
Abstract
Background Ovarian function is closely related to the degree of vascular network development surrounding the ovary. Maternal aging‐related construction defects in this vascular network can cause ovarian hypoxia, which impedes oocyte nutrient supply, leading to physiological changes in the ovaries and oocytes. The anti‐aging gene Sirtuin 1 (SIRT1) senses and adapts to ambient stress and is associated with hypoxic environments and mitochondrial biogenesis. Methods The present study is a literature review focusing on investigations involving the changes in SIRT1 and mitochondrial expression during hypoxia and the cytoprotective effects of the SIRT1 activator, resveratrol. Main findings Hypoxia suppresses SIRT1 and mitochondrial expression. Resveratrol can reverse the hypoxia‐induced decrease in mitochondrial and SIRT1 activity. Resveratrol suppresses the production of hypoxia‐inducible factor‐1α and vascular endothelial growth factor proteins. Conclusion Resveratrol exhibits protective activity against hypoxic stress and may prevent hypoxia‐ or aging‐related mitochondrial dysfunction. Resveratrol treatment may be a potential option for infertility therapy.
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Affiliation(s)
- Akemi Nishigaki
- Department of Obstetrics and Gynecology Kansai Medical University Osaka Japan
| | - Hiroaki Tsubokura
- Department of Obstetrics and Gynecology Kansai Medical University Osaka Japan
| | | | - Hidetaka Okada
- Department of Obstetrics and Gynecology Kansai Medical University Osaka Japan
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Birinci H, Vatansever HS, Yüncü M. Effect of kisspeptin-54 on ovarian levels of pigment epithelium-derived factor (PEDF) and vascular endothelial growth factor (VEGF) in an experimental model of ovarian hyperstimulation syndrome (OHSS). Reprod Fertil Dev 2021; 33:799-809. [PMID: 34610858 DOI: 10.1071/rd21140] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/17/2021] [Accepted: 08/25/2021] [Indexed: 11/23/2022] Open
Abstract
The purpose of this study was to investigate the effect of kisspeptin-54 on ovarian morphology and vascular endothelial growth factor (VEGF), pigment epithelium-derived factor (PEDF), protein kinase A (PKA) and protein kinase C (PKC) levels in an ovarian hyperstimulation syndrome (OHSS) rat model, which is a possible complication of controlled ovarian hyperstimulation. For this purpose, immature female Sprague-Dawley rats (25days old, 30-40g) were randomly divided into five groups (control, sham, OHSS model, short-term kisspeptin-54 administered OHSS model and long-term kisspeptin-54 administered OHSS model). Serum LH and FSH levels were determined by enzyme-linked immunosorbent assay. Immunohistochemistry and quantitative RT-PCR were performed for VEGF, PEDF, PKA and PKC in ovaries and granulosa cells, respectively. It was observed that there was dilatation in fallopian tubes and an abnormal increase in ovarian weight and volume in the OHSS group, and these morphologies decreased with kisspeptin-54 treatment. After the administration of kisspeptin-54 in the OHSS group, VEGF, PKA and PKC levels reduced and PEDF levels increased in both mRNA and protein levels. It was determined that in the OHSS model, VEGF increased as PEDF decreased, and kisspeptin-54 reduced the effects of OHSS. It was determined that long-term kisspeptin-54 treatment was more effective than short-term administration. It is considered that kisspeptin-54 is an agent that protects ovarian reserve and oocyte maturation in women at risk of OHSS.
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Affiliation(s)
- Hülya Birinci
- Faculty of Medicine, Department of Histology and Embryology, Gaziantep University, Gaziantep, Turkey
| | - Hafize Seda Vatansever
- Faculty of Medicine, Department of Histology-Embryology, Manisa Celal Bayar University, Manisa, Turkey; and DESAM Research Institute, Near East University, Mersin 10, Turkey
| | - Mehmet Yüncü
- Faculty of Medicine, Department of Histology and Embryology, Gaziantep University, Gaziantep, Turkey
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Szymanska M, Shrestha K, Girsh E, Harlev A, Eisenberg I, Imbar T, Meidan R. Reduced Endothelin-2 and Hypoxic Signaling Pathways in Granulosa-Lutein Cells of PCOS Women. Int J Mol Sci 2021; 22:ijms22158216. [PMID: 34360981 PMCID: PMC8347025 DOI: 10.3390/ijms22158216] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 07/25/2021] [Accepted: 07/26/2021] [Indexed: 12/13/2022] Open
Abstract
Granulosa-lutein cells (GLCs) from PCOS women display reduced HIF-1α and EDN2 levels, suggesting their role in PCOS etiology. Here, we investigated the mechanisms involved in aberrant EDN2 expression in PCOS, and its association with HIF-1α. Various HIF-1α-dependent factors were studied in GLCs from PCOS and compared to normally ovulating women. MicroRNA-210 (miR-210), its target genes (SDHD and GPD1L), and HIF-1α-responsive genes (EDN2 and VEGFA) differed in GLCs from PCOS, compared with those of healthy women. Levels of miR-210—designated hypoxiamiR—and EDN2 were reduced in the PCOS GLCs; concomitantly, GPD1L and SDHD levels were elevated. Cultured GLCs retained low EDN2 expression and had low HIF-1α levels, providing evidence for a disrupted hypoxic response in the PCOS GLCs. However, VEGFA expression was elevated in these cells. Next, miR-210 levels were manipulated. miR-210-mimic stimulated EDN2 twice as much as the miR-NC-transfected cells, whereas miR-210-inhibitor diminished EDN2, emphasizing the importance of hypoxiamiR for EDN2 induction. Intriguingly, VEGFA transcripts were reduced by both miR-210-mimic and -inhibitor, demonstrating that EDN2 and VEGFA are distinctly regulated. Disrupted hypoxic response in the GLCs of periovulatory follicles in PCOS women may play a role in ovulation failure, and in the reduced fertility prevalent in this syndrome.
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Affiliation(s)
- Magdalena Szymanska
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel; (M.S.); (K.S.)
- Institute of Animal Reproduction and Food Research of the Polish Academy of Sciences, Tuwima 10, 10-748 Olsztyn, Poland
| | - Ketan Shrestha
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel; (M.S.); (K.S.)
- UK Medical Center, Department of Obstetrics and Gynecology, University of Kentucky, Lexington, KY 40536, USA
| | - Eliezer Girsh
- Fertility and IVF Unit, Barzilai University Medical Center, Ashkelon 7830604, Israel; (E.G.); (A.H.)
| | - Avi Harlev
- Fertility and IVF Unit, Barzilai University Medical Center, Ashkelon 7830604, Israel; (E.G.); (A.H.)
- Faculty of Health Sciences, Ben-Gurion University of the Negev, Beer-Sheva 8410501, Israel
| | - Iris Eisenberg
- The Magda and Richard Hoffman Center for Human Placenta Research, Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, Jerusalem 91240, Israel;
| | - Tal Imbar
- The Magda and Richard Hoffman Center for Human Placenta Research, Department of Obstetrics and Gynecology, Hadassah-Hebrew University Medical Center, Jerusalem 91240, Israel;
- Hadassah Ein Kerem Medical Center, Fertility Preservation Unit, Faculty of Medicine, Hebrew University of Jerusalem, Jerusalem 9112102, Israel
- Correspondence: (T.I.); (R.M.)
| | - Rina Meidan
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot 7610001, Israel; (M.S.); (K.S.)
- Correspondence: (T.I.); (R.M.)
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Lim M, Brown HM, Rose RD, Thompson JG, Dunning KR. Dysregulation of bisphosphoglycerate mutase during in vitro maturation of oocytes. J Assist Reprod Genet 2021; 38:1363-1372. [PMID: 34052998 DOI: 10.1007/s10815-021-02230-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Accepted: 05/11/2021] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Oxygen is vital for oocyte maturation; however, oxygen regulation within ovarian follicles is not fully understood. Hemoglobin is abundant within the in vivo matured oocyte, indicating potential function as an oxygen regulator. However, hemoglobin is significantly reduced following in vitro maturation (IVM). The molecule 2,3-bisphosphoglycerate (2,3-BPG) is essential in red blood cells, facilitating release of oxygen from hemoglobin. Towards understanding the role of 2,3-BPG in the oocyte, we characterized gene expression and protein abundance of bisphosphoglycerate mutase (Bpgm), which synthesizes 2,3-BPG, and whether this is altered under low oxygen or hemoglobin addition during IVM. METHODS Hemoglobin and Bpgm expression within in vivo matured human cumulus cells and mouse cumulus-oocyte complexes (COCs) were evaluated to determine physiological levels of Bpgm. During IVM, Bpgm gene expression and protein abundance were analyzed in the presence or absence of low oxygen (2% and 5% oxygen) or exogenous hemoglobin. RESULTS The expression of Bpgm was significantly lower than hemoglobin when mouse COCs were matured in vivo. Following IVM at 20% oxygen, Bpgm gene expression and protein abundance were significantly higher compared to in vivo. At 2% oxygen, Bpgm was significantly higher compared to 20% oxygen, while exogenous hemoglobin resulted in significantly lower Bpgm in the COC. CONCLUSION Hemoglobin and 2,3-BPG may play a role within the maturing COC. This study shows that IVM increases Bpgm within COCs compared to in vivo. Decreasing oxygen concentration and the addition of hemoglobin altered Bpgm, albeit not to levels observed in vivo.
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Affiliation(s)
- Megan Lim
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, South Australia, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia, Australia
| | - Hannah M Brown
- The Victorian Heart Institute, Monash University, Melbourne, Victoria, Australia
| | - Ryan D Rose
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
- Fertility SA, St. Andrews Hospital, South Terrace, Adelaide, South Australia, Australia
| | - Jeremy G Thompson
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, South Australia, Australia
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia, Australia
| | - Kylie R Dunning
- Robinson Research Institute, The University of Adelaide, Adelaide, South Australia, Australia.
- Australian Research Council Centre of Excellence for Nanoscale BioPhotonics, The University of Adelaide, Adelaide, South Australia, Australia.
- Institute for Photonics and Advanced Sensing, The University of Adelaide, Adelaide, South Australia, Australia.
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12
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Patil K, Hinduja I, Mukherjee S. Alteration in angiogenic potential of granulosa-lutein cells and follicular fluid contributes to luteal defects in polycystic ovary syndrome. Hum Reprod 2021; 36:1052-1064. [PMID: 33377483 DOI: 10.1093/humrep/deaa351] [Citation(s) in RCA: 15] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2020] [Revised: 11/20/2020] [Indexed: 12/14/2022] Open
Abstract
STUDY QUESTION Is angiogenic potential of follicular fluid (FF) and granulosa-lutein cells (GLCs) altered in polycystic ovary syndrome (PCOS) and does it play a role in corpus luteum (CL) defect observed in them? SUMMARY ANSWER FF and GLCs of women with PCOS show reduced expression of pro-angiogenic factors compared to controls and exhibit a diminished capacity to induce angiogenesis. WHAT IS KNOWN ALREADY In women with PCOS, CL insufficiency and frequent miscarriage are reported, which may be due to defect in CL. The development of new blood vessels is essential to promote ovarian folliculogenesis and functional CL formation. The vasculature formation in CL which is important for its function is still unexplored in these women. STUDY DESIGN, SIZE, DURATION This case-control study was conducted in 30 healthy control women and 30 women with PCOS undergoing controlled ovarian hyperstimulation for IVF. The FF, GLCs and serum were collected from all participants during ovum pick up. PARTICIPANTS/MATERIALS, SETTING, METHODS The capacity of FF to induce angiogenesis was assessed by measuring levels of pro-angiogenic factors vascular endothelial growth factor (VEGF) and fibroblast growth factor 2 (FGF2) and its tube formation and wound healing potential using human umbilical vein endothelial cells (HUVECs). We investigated the angiogenic potential and endothelial cell-like nature of GLCs using several approaches such as the expression of angiogenic genes by quantitative PCR, DiI-conjugated acetylated low-density lipoproteins (Dil-Ac-LDL) internalization assay, tube formation assay, expression of endothelial cell markers by immunofluorescence analysis. In addition, correlation of transcript levels of angiogenic genes with oocyte parameters was studied. MAIN RESULTS AND THE ROLE OF CHANCE FF and serum levels of VEGF and FGF2 were significantly higher and lower, respectively, in PCOS compared to controls. The tube formation and wound healing capacity of HUVECs was found to be reduced when measured after supplementation with FF of women with PCOS compared to controls. This suggests a decreased angiogenic capacity of FF in women with PCOS. Tube formation (P = 0.003) and Dil-Ac-LDL internalization (P = 0.03) ability of GLCs were significantly reduced in women with PCOS compared to controls. Protein expression levels of endothelial markers, vascular endothelial growth factor A (VEGFA) (P = 0.004), vascular endothelial growth factor receptor 2 (VEGFR2) (P = 0.011), TEK Receptor Tyrosine Kinase (Tie-2) (P = 0.026), fibroblast growth factor receptor 1 (FGFR1) (P = 0.026) and CD31 (P = 0.035) and transcript levels of angiogenic genes VEGFA (P = 0.042), hypoxia inducing factor 1A (HIF1A) (P = 0.025), FGF2 (P = 0.038), angiopoietin 1 (ANGPT1) (P = 0.028), heparin sulfate proteoglycan 2 (HSPG2) (P = 0.016), ADAM metallopeptidase with thrombospondin type1 motif, 1 (ADAMTS1) (P = 0.027) and fibronectin 1 (FN1) (P = 0.016) were found to be low in GLCs of PCOS compared to controls. Thus, the findings of this study indicate that endothelial cell-like characteristics of GLCs were significantly decreased in PCOS. Furthermore, transcript levels of VEGFA (r = 0.46, P = 0.009), ADAMTS1 (r = 0.55, P = 0.001), FGF2 (r = 0.42, P = 0.022) and ANGPT2 (r = 0.47, P = 0.008) showed a positive correlation with oocyte fertilization rate. LIMITATIONS, REASONS FOR CAUTION The vasculature formation in CL is not possible to study in women, but we explored the angiogenic characteristics of FF and GLC obtained from women with PCOS to speculate any vascularization defect of CL in these women. The FF and GLCs were obtained from the stimulated cycle during oocyte retrieval, which may not exactly mimic the in-vivo condition. The small sample size is another limitation of this study. Larger sample size and support by color Doppler studies on CL blood flow would help to strengthen our findings. WIDER IMPLICATIONS OF THE FINDINGS Our findings suggest that the altered angiogenic potential of FF and GLCs may affect vasculature development required for CL formation and function in PCOS. These findings pave the way to devise therapeutic strategies to support angiogenesis process in follicle of women with PCOS, which may improve CL insufficiency, progesterone levels and prevent frequent miscarriages in these women. Furthermore, our study also hypothesizes that the vascularization around the ovarian follicles is also compromised which may lead to the growth arrest of the follicles in PCOS, however, this needs thorough investigations. STUDY FUNDING/COMPETING INTEREST(S) This work was supported by Grant BT/PR16524/MED/97/346/2016 from the Department of Biotechnology, Government of India. The authors have no conflicts of interest to disclose. TRIAL REGISTRATION NUMBER N/A.
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Affiliation(s)
- Krutika Patil
- Department of Molecular Endocrinology, ICMR-National Institute for Research in Reproductive Health, Parel, Mumbai 400012, India
| | - Indira Hinduja
- Hinduja IVF Centre, P.D. Hinduja National Hospital and Medical Research Centre, Mumbai 400016, India
| | - Srabani Mukherjee
- Department of Molecular Endocrinology, ICMR-National Institute for Research in Reproductive Health, Parel, Mumbai 400012, India
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13
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Tang Z, Zhang Z, Lin Q, Xu R, Chen J, Wang Y, Zhang Y, Tang Y, Shi C, Liu Y, Yang H, Wang Z. HIF-1α/BNIP3-Mediated Autophagy Contributes to the Luteinization of Granulosa Cells During the Formation of Corpus Luteum. Front Cell Dev Biol 2021; 8:619924. [PMID: 33537309 PMCID: PMC7848109 DOI: 10.3389/fcell.2020.619924] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 12/18/2020] [Indexed: 12/13/2022] Open
Abstract
During the luteinization after ovulation in mammalian ovary, the containing cells undergo an energy consuming function re-determination process to differentiate into luteal cells under avascular environment. Previous evidences have delineated the contribution of autophagy to the cell differentiation and the catabolic homeostasis in various types of mammalian cells, whereas few interest had been focused on the involvement of autophagy in the luteinization of granulosa cells during the formation of early corpus luteum. Herein, the present study investigated that expression and contribution of autophagy during granulosa cell luteinization and early luteal development through in vivo and in vitro experiments. The results clearly demonstrated that HIF-1α/BNIP3-mediated autophagy plays a vital role in the luteinization of granulosa cells during the early luteal formation in vivo and in vitro. In the neonatal corpus luteum, HIF-1α up-regulated BNIP3 expressions, which contributed to the autophagic initiation by disrupting beclin1 from Bcl-2/beclin1 complex and protected cells from apoptosis by curbing the skew of mitochondria balance under avascular niche. Notably, Inhibition of HIF-1α activity by echinomycin enhanced the levels of cytoplasmic cytochrome c and cell apoptosis in the nascent corpus luteum. These findings revealed that HIF-1α/BNIP3-mediated autophagy enabled the process of granulosa cell luteinization and protected the granulosa-lutein cells from further apoptosis under hypoxia niche. To our knowledge, the present study firstly clarified that HIF-1α/BNIP3-mediated autophagy contributes to the luteinization of granulosa cells during the formation of pregnant corpus luteum, which will help us further understanding the luteal biology and provide us new clues for the treatment of luteal insufficiency.
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Affiliation(s)
- Zonghao Tang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China.,Key Laboratory of Medical Electrophysiology of Ministry of Education and Sichuan Province, Drug Discovery Research Center, Southwest Medical University, Luzhou, China
| | - Zhenghong Zhang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Qingqiang Lin
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Renfeng Xu
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Jiajie Chen
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China.,Department of Pharmacological and Pharmaceutical Sciences, College of Pharmacy, University of Houston, Houston, TX, United States
| | - Yuhua Wang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Yan Zhang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Yedong Tang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China.,Provincial Key Laboratory of Reproductive Health Research, School of Medicine, Xiamen University, Xiamen, China
| | - Congjian Shi
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Yiping Liu
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Hongqin Yang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
| | - Zhengchao Wang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, Provincial University Key Laboratory of Sport and Health Science, Key Laboratory of Optoelectronic Science and Technology for Medicine of Ministry of Education, College of Life Sciences, Fujian Normal University, Fuzhou, China
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14
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Dhole B, Gupta S, Kumar A. Triiodothyronine stimulates steroid and VEGF production in murine Leydig cells via cAMP-PKA pathway. Andrologia 2021; 53:e13972. [PMID: 33440041 DOI: 10.1111/and.13972] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2020] [Revised: 12/29/2020] [Accepted: 12/29/2020] [Indexed: 11/28/2022] Open
Abstract
Thyroid hormones affect testicular development as well as functions like spermatogenesis and steroidogenesis, thereby influencing male fertility. Our group earlier showed that the stimulatory role of the thyroid hormone, T3 , on the production of vascular endothelial growth factor (VEGF) by murine Leydig cells is mediated by steroids and hypoxia-inducible factor-1 (HIF-1α). The current study further defines the signalling pathway(s) utilised by T3 to stimulate the production of steroids, VEGF and HIF-1α in mouse Leydig tumour cell line (MLTC-1). Specific inhibitors for different signalling molecules were used to study the role of cyclic AMP (cAMP), and its downstream mediators. Expression of VEGF and HIF-1α mRNA were measured by quantitative RT-PCR; VEGF secretion by ELISA; steroid secretion by radioimmunoassay and HIF-1α protein levels by western blotting. Inhibitors of adenylate cyclase (AC), protein kinase A (PKA), sarcoma kinase (SrcK), phosphoinositide 3-kinase (PI3K) and MAP kinase kinase (MEK1/2) abolished the T3 -induced increase in VEGF mRNA and protein levels. The same signalling molecules also mediated the increased production of steroids and HIF-1α protein in response to T3 . Therefore, it was concluded that T3 stimulates steroid secretion and HIF-1α protein in MLTC-1 cells through the AC-cAMP-PKA-PI3K-MEK pathway, which in turn stimulate VEGF production.
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Affiliation(s)
- Bodhana Dhole
- Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, India
| | - Surabhi Gupta
- Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, India
| | - Anand Kumar
- Department of Reproductive Biology, All India Institute of Medical Sciences, New Delhi, India
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15
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Szymanska M, Manthe S, Shrestha K, Girsh E, Harlev A, Kisliouk T, Meidan R. Sirtuin-1 inhibits endothelin-2 expression in human granulosa-lutein cells via hypoxia inducible factor 1 alpha and epigenetic modifications†. Biol Reprod 2020; 104:387-398. [PMID: 33112382 DOI: 10.1093/biolre/ioaa199] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Revised: 09/26/2020] [Accepted: 10/22/2020] [Indexed: 01/17/2023] Open
Abstract
Endothelin-2 (EDN2) expression in granulosa cells was previously shown to be highly dependent on the hypoxic mediator, hypoxia inducible factor 1 alpha (HIF1A). Here, we investigated whether sirtuin-1 (SIRT1), by deacetylating HIF1A and class III histones, modulates EDN2 in human granulosa-lutein cells (hGLCs). We found that HIF1A was markedly suppressed in the presence of resveratrol or a specific SIRT1 activator, SRT2104. In turn, hypoxia reduced SIRT1 levels, implying a mutually inhibitory interaction between hypoxia (HIF1A) and SIRT1. Consistent with reduced HIF1A transcriptional activity, SIRT1 activators, resveratrol, SRT2104, and metformin, each acting via different mechanisms, significantly inhibited EDN2. In support, knockdown of SIRT1 with siRNA markedly elevated EDN2, whereas adding SRT2104 to SIRT1-silenced cells abolished the stimulatory effect of siSIRT1 on EDN2 levels further demonstrating that EDN2 is negatively correlated with SIRT1. Next, we investigated whether SIRT1 can also mediate the repression of the EDN2 promoter via histone modification. Chromatin immunoprecipitation (ChIP) analysis revealed that SIRT1 is indeed bound to the EDN2 promoter and that elevated SIRT1 induced a 40% decrease in the acetylation of histone H3, suggesting that SIRT1 inhibits EDN2 promoter activity by inducing a repressive histone configuration. Importantly, SIRT1 activation, using SRT2104 or resveratrol, decreased the viable numbers of hGLC, and silencing SIRT1 enhanced hGLC viability. This effect may be mediated by reducing HIF1A and EDN2 levels, shown to promote cell survival. Taken together, these findings propose novel, physiologically relevant roles for SIRT1 in downregulating EDN2 and survival of hGLCs.
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Affiliation(s)
- Magdalena Szymanska
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Sarah Manthe
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Ketan Shrestha
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Eliezer Girsh
- Fertility and IVF Unit, Department of Obstetrics and Gynecology, Barzilai University Medical Center, Ashkelon, Israel
| | - Avi Harlev
- Fertility and IVF Unit, Department of Obstetrics and Gynecology, Barzilai University Medical Center, Ashkelon, Israel.,Faculty of Health Sciences, Department of Obstetrics and Gynecology, Ben-Gurion University of the Negev, Beer-Sheva, Israel
| | - Tatiana Kisliouk
- Agricultural Research Organization, Volcani Center, Department of Poultry and Aquaculture Science, Rishon LeZiyyon, Israel
| | - Rina Meidan
- Department of Animal Sciences, The Robert H. Smith Faculty of Agriculture, Food and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
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16
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Berisha B, Schams D, Sinowatz F, Rodler D, Pfaffl MW. Hypoxia-inducible factor-1alpha and nitric oxide synthases in bovine follicles close to ovulation and early luteal angiogenesis. Reprod Domest Anim 2020; 55:1573-1584. [PMID: 32869370 DOI: 10.1111/rda.13812] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2020] [Revised: 08/05/2020] [Accepted: 08/23/2020] [Indexed: 11/30/2022]
Abstract
The objective of the study was to characterize expression patterns of hypoxia-inducible factor-1alpha (HIF1A), inducible nitric oxide synthase (iNOS) and endothelial (eNOS) isoforms in time-defined follicle classes before and after GnRH application in the cow. Ovaries containing pre-ovulatory follicles or corpora lutea were collected by transvaginal ovariectomy (n = 5 cows/group) as follow: (I) before GnRH administration; (II) 4h after GnRH; (III) 10h after GnRH; (IV) 20h after GnRH; (V) 25h after GnRH; and (VI) 60h after GnRH (early corpus luteum). The mRNA abundance of HIF1A in the follicle group before GnRH was high, followed by a significant down regulation afterwards with a minimum level 25h after GnRH (close to ovulation) and significant increase only after ovulation. The mRNA abundance of iNOS before GnRH was high, decreased significantly during LH surge, with minimum levels afterwards. In contrast, the mRNA of eNOS decreased in the follicle group 20h after GnRH, followed by a rapid and significant upregulation just after ovulation. Immunohistochemically, the granulosa cells of antral follicles and the eosinophils of the theca tissue as well of the early corpus luteum showed a strong staining for HIF1A. The location of the eosinophils could be clearly demonstrated by immunostaining with an eosinophil-specific antibody (EMBP) and transmission electron microscopy. In conclusion, the parallel and acute regulated expression patterns of HIF1A and NOS isoforms, specifically during the interval between the LH surge and ovulation, indicate that these paracrine factors are involved in the local mechanisms, regulating final follicle maturation, ovulation and early luteal angiogenesis.
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Affiliation(s)
- Bajram Berisha
- Animal Biotechnology, Faculty of Agriculture and Veterinary, University of Prishtina, Prishtinë, Kosovo.,Animal Physiology and Immunology Weihenstephan, Technical University of Munich, Freising, Germany
| | - Dieter Schams
- Animal Physiology and Immunology Weihenstephan, Technical University of Munich, Freising, Germany
| | - Fred Sinowatz
- Department of Veterinary Sciences, Ludwig Maximilian University of Munich, Munich, Germany
| | - Daniela Rodler
- Department of Veterinary Sciences, Ludwig Maximilian University of Munich, Munich, Germany
| | - Michael W Pfaffl
- Animal Physiology and Immunology Weihenstephan, Technical University of Munich, Freising, Germany
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17
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Decidual Vasculopathy and Spiral Artery Remodeling Revisited III: Hypoxia and Re-oxygenation Sequence with Vascular Regeneration. REPRODUCTIVE MEDICINE 2020. [DOI: 10.3390/reprodmed1020006] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022] Open
Abstract
Aim: Spiral artery remodeling at early pregnancy is characterized by two distinct mechanisms with two morphologic features, namely, trophoblastic-dependent vascular invasion with “plugging”, and trophoblastic-independent mural muscular hypertrophy/hyperplasia, both of which lead to the blocking or narrowing of the arterial lumen with the consequence of reduced maternal blood flow to the developing embryo. Methods: Review of historic literature in light of the new discovery of CD56 (NCAM) expression on endovascular trophoblasts at late gestation, in relation to placental lateral growth with vascular regeneration. Results: Reduced maternal blood flow to the embryo results in a hypoxic condition critical for trophectoderm differentiation and proliferation. Hypoxia is also important for the development of hemangioblasts of vasculogenesis, and hematopoiesis of the placental villi. Up to 13 weeks, both uteroplacental and fetoplacental circulations are established and hypoxic condition relieved for normal fetal/placenta development by ultrasonography. The persistence of trophoblastic plugging and/or mural muscular hypertrophy/hyperplasia leads to persistent reduced maternal blood flow to the placenta, resulting in persistent hypoxia and increased angiogenesis, with a constellation of pathologic features of maternal vascular malperfusion atlate gestation. Wilm’s tumor gene (WT1) expression appears to be central to steroid and peptide hormonal actions in early pregnancy, and vascular regeneration/restoration after pregnancy. Conclusions: Spiral artery remodeling at early pregnancy leads to hypoxia with vascular transformation, and the establishment of uteroplacental circulation results in relief of hypoxia. The hypoxia–re-oxygenation sequence may provide insights into the mechanism of normal fetal/placental development and associated pregnancy complications, such as preeclampsia.
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18
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Mezera MA, Li W, Edwards AJ, Koch DJ, Beard AD, Wiltbank MC. Identification of stable genes in the corpus luteum of lactating Holstein cows in pregnancy and luteolysis: Implications for selection of reverse-transcription quantitative PCR reference genes. J Dairy Sci 2020; 103:4846-4857. [PMID: 32229123 DOI: 10.3168/jds.2019-17526] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Accepted: 01/10/2020] [Indexed: 12/20/2022]
Abstract
In lactating dairy cattle, the corpus luteum (CL) is a dynamic endocrine tissue vital for pregnancy maintenance, fertility, and cyclicity. Understanding processes underlying luteal physiology is therefore necessary to increase reproductive efficiency in cattle. A common technique for investigating luteal physiology is reverse-transcription quantitative PCR (RT-qPCR), a valuable tool for quantifying gene expression. However, reference-gene-based RT-qPCR quantification methods require utilization of stably expressed genes to accurately assess mRNA expression. Historically, selection of reference genes in cattle has relied on subjective selection of a small pool of reference genes, many of which may have significant expression variation among different tissues or physiologic states. This is particularly concerning in dynamic tissues such as the CL, with its capacity for rapid physiologic changes during luteolysis, and likely in the less characterized period of CL maintenance during pregnancy. Thus, there is a clear need to identify reference genes well suited for the bovine CL over a wide range of physiological states. Whole-transcriptome RNA sequencing stands as an effective method to identify new reference genes by enabling the assessment of the expression profile of the entire pool of mRNA transcripts. We report the identification of 13 novel putative reference genes using RNA sequencing in the bovine CL throughout early pregnancy and luteolysis: RPL4, UQCRFS1, COX4I1, RPS4X, SSR3, CST3, ZNF266, CDC42, CD63, HIF1A, YWHAE, EIF3E, and PPIB. Independent RT-qPCR analyses were conducted confirming expression stability in another set of CL tissues from pregnancy and regression, with analyses performed for 3 groups of samples: (1) all samples, (2) samples from pregnancy alone, and (3) samples throughout the process of CL regression. Seven genes were found to be more stable in all states than 2 traditional reference genes (ACTB and GAPDH): RPS4X, COX4I1, PPIB, SSR3, RPL4, YWHAE, and CDC42. When CL tissues from pregnant animals alone were analyzed, CST3, HIF1A, and CD63 were also identified as more stable than ACTB and GAPDH. Identification of these new reference genes will aid in accurate normalization of RT-qPCR results, contributing to proper interpretation of gene expression relevant to luteal physiology. Furthermore, our analysis sheds light on the effects of luteolysis and pregnancy on the stability of gene expression in the bovine CL.
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Affiliation(s)
- M A Mezera
- Department of Dairy Science, University of Wisconsin, Madison 53706; Endocrinology and Reproductive Physiology Program, University of Wisconsin, Madison 53706
| | - W Li
- USDA Dairy Forage Research Center, Madison, WI 53706.
| | - A J Edwards
- USDA Dairy Forage Research Center, Madison, WI 53706
| | - D J Koch
- USDA Dairy Forage Research Center, Madison, WI 53706
| | - A D Beard
- Department of Dairy Science, University of Wisconsin, Madison 53706; Endocrinology and Reproductive Physiology Program, University of Wisconsin, Madison 53706
| | - M C Wiltbank
- Department of Dairy Science, University of Wisconsin, Madison 53706
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19
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Lu E, Li C, Wang J, Zhang C. Inflammation and angiogenesis in the corpus luteum. J Obstet Gynaecol Res 2019; 45:1967-1974. [PMID: 31373134 DOI: 10.1111/jog.14076] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2019] [Accepted: 07/15/2019] [Indexed: 12/15/2022]
Abstract
Angiogenesis is a very important process that helps establish and maintain the normal structure and function of the corpus luteum (CL). Early luteal development can be considered a kind of physiological injury with an inflammatory response; therefore, the inflammatory response may play an important role in the luteal angiogenesis. The inflammatory response is companied by activated leukocytes and their mediators. For luteal tissue, numerous activated leukocytes such as macrophages, neutrophils and eosinophils are present in the early luteal phase and are widely involved in neovascularization. The objective of this review is to describe the role of the inflammatory factors in the angiogenesis and to discuss their mechanism. Knowledge of action and mechanism of these inflammatory factors on angiogenic activity will be beneficial for the understanding of luteal function.
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Affiliation(s)
- Enhang Lu
- Joint Programme of Nanchang University and Queen Mary University of London, School of Medicine, Nanchang University, Nanchang, China
| | - Chunjie Li
- Forth Clinical College, School of Medicine, Nanchang University, Nanchang, China
| | - Jing Wang
- Department of Microbiology, School of Medicine, Nanchang University, Nanchang, China
| | - Chunping Zhang
- Department of Cell Biology, School of Medicine, Nanchang University, Nanchang, China
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20
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Poch A, Villanelo F, Henriquez S, Kohen P, Muñoz A, Strauss JF, Devoto L. Molecular modelling predicts that 2-methoxyestradiol disrupts HIF function by binding to the PAS-B domain. Steroids 2019; 144:21-29. [PMID: 30738071 DOI: 10.1016/j.steroids.2019.02.004] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/10/2018] [Revised: 01/17/2019] [Accepted: 02/04/2019] [Indexed: 01/28/2023]
Abstract
An estradiol metabolite, 2-methoxyestradiol (2ME), has emerged as an important regulator of ovarian physiology. 2ME is recognized as a potent anti-angiogenic agent in clinical trials and laboratory studies. However, little is known about its molecular actions and its endogenous targets. 2ME is produced by human ovarian cells during the normal menstrual cycle, being higher during regression of the corpus luteum, and is postulated to be involved in the anti-angiogenic process that plays out during luteolysis. We utilized cell biology techniques to understand the molecular mechanism of 2ME anti-angiogenic effects on human granulosa luteal cells. The principal effect of 2ME was to alter Hypoxia Inducible Factor 1A (HIF1A) sub-cellular localization. Molecular modelling and multiple bioinformatics tools indicated that 2ME impairs Hypoxia Inducible Factor complex (HIF) nuclear translocation by binding to a buried pocket in the HIF1A Per Arnt Sim (PAS)-B domain. Binding of 2ME to HIF1A protein is predicted to perturb HIF1A-Hypoxia Inducible Factor B (HIFB) interaction, a key step in HIF nuclear translocation, preventing the transcriptional actions of HIF, including Vascular Endotelial Growth Factor (VEGF) gene activation. To our knowledge, 2ME is the first putative HIF endogenous ligand characterized with anti-angiogenic activity. This postulate has important implications for reproduction, because angiogenic processes are critical for ovarian follicular development, ovulation and corpus luteum regression. The present research could contribute to the development of novel pharmacological approaches for controlling HIF activity in human reproductive diseases.
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Affiliation(s)
- Andrea Poch
- Institute for Maternal and Child Research (IDIMI), School of Medicine, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile
| | - Felipe Villanelo
- Computational Biology Lab (DLab), Fundación Ciencia & Vida. Avenida Zañartu 1482, 7780272 Ñuñoa, Santiago, Chile; Centro Interdisciplinario de Neurociencias de Valparaíso, Universidad de Valparaíso, Harrington 287, Valparaíso, Chile
| | - Soledad Henriquez
- Institute for Maternal and Child Research (IDIMI), School of Medicine, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile
| | - Paulina Kohen
- Institute for Maternal and Child Research (IDIMI), School of Medicine, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile
| | - Alex Muñoz
- Institute for Maternal and Child Research (IDIMI), School of Medicine, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile
| | - Jerome F Strauss
- Department of Obstetrics and Gynecology, School of Medicine, Virginia Commonwealth University, Sanger Hall, 1101 E Marshall St., 980565 Richmond, VA, USA
| | - Luigi Devoto
- Institute for Maternal and Child Research (IDIMI), School of Medicine, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile; Department of Obstetrics and Gynecology, School of Medicine, San Borja-Arriaran Clinical Hospital, University of Chile, Avenida Santa Rosa 1234, 8360160 Santiago-Centro, Santiago, Chile.
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Chediek Dall’Acqua P, Barros Nunes G, Rodrigues da Silva C, Fontes PK, Fábio Gouveia Nogueira M, Lombardi Lopes F, Marinho M, Zoccal Mingoti G. Differences in embryonic gene expression and quality indicate the benefit of epidermal growth factor receptor inhibitor during prematuration to improve competence in bovine oocytes. Reprod Domest Anim 2019; 54:666-677. [DOI: 10.1111/rda.13405] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2018] [Accepted: 12/28/2018] [Indexed: 12/01/2022]
Affiliation(s)
- Priscila Chediek Dall’Acqua
- Department of Preventive Medicine and Animal Reproduction, School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP) Jaboticabal Brazil
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
| | - Giovana Barros Nunes
- Department of Preventive Medicine and Animal Reproduction, School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP) Jaboticabal Brazil
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
| | - Cíntia Rodrigues da Silva
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
| | - Patrícia Kubo Fontes
- Department of Pharmacology, Institute of Biosciences São Paulo State University (UNESP) Botucatu Brazil
| | - Marcelo Fábio Gouveia Nogueira
- Department of Pharmacology, Institute of Biosciences São Paulo State University (UNESP) Botucatu Brazil
- Department of Biological Sciences, School of Sciences, Humanities and Languages São Paulo State University (UNESP) Assis Brazil
| | - Flávia Lombardi Lopes
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
| | - Márcia Marinho
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
| | - Gisele Zoccal Mingoti
- Department of Preventive Medicine and Animal Reproduction, School of Agricultural and Veterinarian Sciences São Paulo State University (UNESP) Jaboticabal Brazil
- Laboratory of Reproductive Physiology, School of Veterinary Medicine São Paulo State University (UNESP) Araçatuba Brazil
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C/EBPβ regulates Vegf gene expression in granulosa cells undergoing luteinization during ovulation in female rats. Sci Rep 2019; 9:714. [PMID: 30679486 PMCID: PMC6345775 DOI: 10.1038/s41598-018-36566-y] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2018] [Accepted: 11/23/2018] [Indexed: 11/08/2022] Open
Abstract
The ovulatory LH-surge increases Vegf gene expression in granulosa cells (GCs) undergoing luteinization during ovulation. To understand the factors involved in this increase, we examined the roles of two transcription factors and epigenetic mechanisms in rat GCs. GCs were obtained from rats treated with eCG before, 4 h, 8 h, 12 h and 24 h after hCG injection. Vegf mRNA levels gradually increased after hCG injection and reached a peak at 12 h. To investigate the mechanism by which Vegf is up-regulated after hCG injection, we focused on C/EBPβ and HIF1α. Their protein expression levels were increased at 12 h. The binding activity of C/EBPβ to the Vegf promoter region increased after hCG injection whereas that of HIF1α did not at this time point. The C/EBPβ binding site had transcriptional activities whereas the HIF1α binding sites did not have transcriptional activities under cAMP stimulation. The levels of H3K9me3 and H3K27me3, which are transcriptional repression markers, decreased in the C/EBPβ binding region after hCG injection. The chromatin structure of this region becomes looser after hCG injection. These results show that C/EBPβ regulates Vegf gene expression with changes in histone modifications and chromatin structure of the promoter region in GCs undergoing luteinization during ovulation.
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Nio-Kobayashi J, Kudo M, Sakuragi N, Iwanaga T, Duncan WC. Loss of luteotropic prostaglandin E plays an important role in the regulation of luteolysis in women. Mol Hum Reprod 2018; 23:271-281. [PMID: 28333263 DOI: 10.1093/molehr/gax011] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2016] [Accepted: 03/02/2017] [Indexed: 11/13/2022] Open
Abstract
STUDY QUESTION Do intraluteal prostaglandins (PG) contribute to luteal regulation in women? SUMMARY ANSWER Prostaglandin E (PGE), which is produced in human granulosa-lutein cells stimulated with luteotropic hCG, exerts similar luteotropic effects to hCG, and the expression of PG synthetic and metabolic enzymes in the human CL is driven toward less PGE but more prostaglandin F (PGF) during luteolysis. WHAT IS KNOWN ALREADY Uterine PGF is a major luteolysin in many non-primate species but not in women. Increases in the PGF synthase, aldo-ketoreductase family one member C3 (AKR1C3), have been observed in the CL of marmoset monkeys during luteolysis. PGE prevents spontaneous or induced luteolysis in domestic animals. STUDY DESIGN, SIZE, DURATION Human CL tissues staged as the early-luteal (n = 6), mid-luteal (n = 6), late-luteal (n = 5) and menstrual (n = 3) phases were obtained at the time of hysterectomy for benign gynecological conditions. Luteinized granulosa cells (LGCs) were purified from follicular fluids obtained from patients undergoing assisted conception. PARTICIPANTS/MATERIALS, SETTING, METHODS Upon collection, one half of the CL was snap-frozen and the other was fixed with formalin and processed for immunohistochemical analysis of a PGE synthase (PTGES). Quantitative RT-PCR was employed to examine changes in the mRNA abundance of PG synthetic and metabolic enzymes, steroidogenic enzymes, and luteolytic molecules in the staged human CL and in human LGCs in vitro treated with hCG, PGE and PGF. A PGE withdrawal experiment was also conducted in order to reveal the effects of the loss of PGE in LGCs. Progesterone concentrations in the culture medium were measured. MAIN RESULTS AND THE ROLE OF CHANCE The key enzyme for PGE synthesis, PTGES mRNA was abundant in the functional CL during the mid-luteal phase (P < 0.01), while mRNA abundance for genes involved in PGF synthesis (AKR1B1 and AKR1C1-3) increased in the CL during the late-luteal phase and menstruation (P < 0.05-0.001). PTGES mRNA expression positively correlated with that of 3β-hydroxysteroid dehydrogenase (HSD3B1; r = 0.7836, P < 0.001), while AKR1C3 expression inversely correlated with that of HSD3B1 (r = -0.7514, P = 0.0012) and PTGES (r = -0.6923, P = 0.0042). PGE exerted similar effects to hCG-promoting genes, such as steroidogenic acute regulatory protein (STAR) and HSD3B1, to produce progesterone and luteotropic PGE, suppress PGF synthetic enzymes and down-regulate luteolytic molecules such as βA- and βB-inhibin subunits (INHBA and INHBB) and bone morphogenetic proteins (BMP2, BMP4 and BMP6). PGE withdrawal resulted in reductions in the enzymes that produce progesterone (STAR; P < 0.001) and PGE (PTGES; P < 0.001), and the capacity to produce PGE decreased, while the capacity to produce PGF increased during the culture. The addition of PGF did not recapitulate the luteolytic effects of PGE withdrawal. LARGE SCALE DATA None. LIMITATIONS, REASONS FOR CAUTION Changes in mRNA expression of PG synthetic and metabolic enzymes may not represent actual increases in PGF during luteolysis in the CL. The effects of PGF on luteal cells currently remain unclear and the mechanisms responsible for decreases in the synthesis of PGE in vitro and at luteolysis have not been elucidated in detail. WIDER IMPLICATIONS OF THE FINDINGS The results obtained strongly support a luteotropic function of PGE in regulation of the human CL. They suggest that the main PG produced in human luteal tissue changes from PGE to PGF during the maturation and regression of the CL, and the loss of PGE is more important than the effects of PGF during luteolysis in women. This may be accompanied by reduced effects of LH/hCG in luteal cells, particularly decreased activation of cAMP/protein kinase A; however, the underlying mechanisms remain unknown. STUDY FUNDING AND COMPETING INTEREST(S) This study was supported by the Cunningham Trust to WCD, a Postdoctoral Fellowship for Research Abroad from the Japan Society for the Promotion of Science and the Suntory Foundation for Life Sciences to J.N.-K.; W.C.D. is supported by an MRC Centre Grant G1002033 and a Scottish Senior Clinical Fellowship. The authors have nothing to disclose.
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Affiliation(s)
- Junko Nio-Kobayashi
- Laboratory of Histology and Cytology, Hokkaido University Graduate School of Medicine, Kita 15-Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - Masataka Kudo
- Department of Reproductive Endocrinology and Oncology, Hokkaido University Graduate School of Medicine, Kita 15-Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - Noriaki Sakuragi
- Department of Reproductive Endocrinology and Oncology, Hokkaido University Graduate School of Medicine, Kita 15-Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - Toshihiko Iwanaga
- Laboratory of Histology and Cytology, Hokkaido University Graduate School of Medicine, Kita 15-Nishi 7, Kita-ku, Sapporo 060-8638, Japan
| | - W Colin Duncan
- MRC Centre for Reproductive Health, The Queen's Medical Research Institute, The University of Edinburgh, 47 Little France Crescent, EdinburghEH16 4TJ, UK
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Shrestha K, Onasanya AE, Eisenberg I, Wigoda N, Yagel S, Yalu R, Meidan R, Imbar T. miR-210 and GPD1L regulate EDN2 in primary and immortalized human granulosa-lutein cells. Reproduction 2018; 155:197-205. [PMID: 29301980 DOI: 10.1530/rep-17-0574] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Revised: 11/22/2017] [Accepted: 12/04/2017] [Indexed: 11/08/2022]
Abstract
Endothelin-2 (EDN2), expressed at a narrow window during the periovulatory period, critically affects ovulation and corpus luteum (CL) formation. LH (acting mainly via cAMP) and hypoxia are implicated in CL formation; therefore, we aimed to elucidate how these signals regulate EDN2 using human primary (hGLCs) and immortalized (SVOG) granulosa-lutein cells. The hypoxiamiR, microRNA-210 (miR-210) was identified as a new essential player in EDN2 expression. Hypoxia (either mimetic compound-CoCl2, or low O2) elevated hypoxia-inducible factor 1A (HIF1A), miR-210 and EDN2 Hypoxia-induced miR-210 was suppressed in HIF1A-silenced SVOG cells, suggesting that miR-210 is HIF1A dependent. Elevated miR-210 levels in hypoxia or by miR-210 overexpression, increased EDN2 Conversely, miR-210 inhibition reduced EDN2 levels, even in the presence of CoCl2, indicating the importance of miR-210 in the hypoxic induction of EDN2 A molecule that destabilizes HIF1A protein, glycerol-3-phosphate dehydrogenase 1-like gene-GPD1L, was established as a miR-210 target in both cell types. It was decreased by miR-210-mimic and was increased by miR-inhibitor. Furthermore, reducing GPD1L by endogenously elevated miR-210 (in hypoxia), miR-210-mimic or by GPD1L siRNA resulted in elevated HIF1A protein and EDN2 levels, implying a vital role for GPD1L in the hypoxic induction of EDN2 Under normoxic conditions, forskolin (adenylyl cyclase activator) triggered changes typical of hypoxia. It elevated HIF1A, EDN2 and miR-210 while inhibiting GPD1L Furthermore, HIF1A silencing greatly reduced forskolin's ability to elevate EDN2 and miR-210. This study highlights the novel regulatory roles of miR-210 and its gene target, GPD1L, in hypoxia and cAMP-induced EDN2 by human granulosa-lutein cells.
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Affiliation(s)
- Ketan Shrestha
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Adepeju Esther Onasanya
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Iris Eisenberg
- The Magda and Richard Hoffman Center for Human Placenta ResearchHadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Noa Wigoda
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Simcha Yagel
- The Magda and Richard Hoffman Center for Human Placenta ResearchHadassah Hebrew University Medical Center, Jerusalem, Israel.,Department of Obstetrics and GynecologyHadassah Hebrew University Medical Center, Jerusalem, Israel
| | - Ronit Yalu
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Rina Meidan
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Rehovot, Israel
| | - Tal Imbar
- The Magda and Richard Hoffman Center for Human Placenta ResearchHadassah Hebrew University Medical Center, Jerusalem, Israel.,Department of Obstetrics and GynecologyHadassah Hebrew University Medical Center, Jerusalem, Israel
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25
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Nishimura R, Okuda K, Gunji Y, Khalid AM, Yamano Y, Yamashita Y, Hishinuma M. BNIP3 expression in bovine follicle and corpus luteum. J Vet Med Sci 2017; 80:368-374. [PMID: 29269703 PMCID: PMC5836779 DOI: 10.1292/jvms.17-0267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
BNIP3 (BCL2/adenovirus E1B nineteen kilodalton interacting protein-3), a member of the
BCL2 family, is activated under hypoxic conditions and induces apoptosis or mitochondrial
autophagy for adapting cells to hypoxia. The physiological roles of BNIP3 in the mammalian
ovary are still unclear. In order to understand the role of BNIP3 in the bovine ovary, we
examined its mRNA and protein expressions of BNIP3 in follicular granulosa cells and
corpus luteum (CL). BNIP3 mRNA and protein expressions in granulosa cells from large
follicles (>10 mm) at the follicular stage were much higher than those in small
follicles (2–8 mm). BNIP3 mRNA and protein expressions in the CL peaked at the early
luteal stage. In bovine granulosa cells cultured for 6 hr under hypoxia (3% O2)
and normoxia (20% O2), BNIP3 mRNA expression was higher under hypoxia. These
results of the present study suggest that BNIP3 has some roles in luteal formation in the
bovine ovary, and that the highly expressed BNIP3 in the granulosa cells from large
follicles at the follicular stage is related to the roles of BNIP3 in the luteal
formation.
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Affiliation(s)
- Ryo Nishimura
- Laboratory of Theriogenology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
| | - Kiyoshi Okuda
- Laboratory of Reproductive Physiology, Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
| | - Yosuke Gunji
- Laboratory of Theriogenology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.,United Graduate School of Veterinary Science, Yamaguchi University, Yoshida 1677-1, Yamaguchi 753-8511, Japan
| | - Ahmed Magzoub Khalid
- United Graduate School of Veterinary Science, Yamaguchi University, Yoshida 1677-1, Yamaguchi 753-8511, Japan.,Laboratory of Veterinary Biochemistry, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan.,Department of Genetics and Animal Breeding, Faculty of Animal Production, University of Khartoum, Shambat 13314, Sudan
| | - Yoshiaki Yamano
- Laboratory of Veterinary Biochemistry, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
| | - Yasuhisa Yamashita
- Laboratory of Animal Physiology, Faculty of Life and Environmental Sciences, Prefectural University of Hiroshima, 562 Nanatuka-cho, Shobara, Hiroshima 727-0023, Japan
| | - Mitsugu Hishinuma
- Laboratory of Theriogenology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
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Chen X, Liu Y, Shan Y, Jin X, Shi Q, Jia C. Oxidized low-density lipoprotein suppresses mouse granulosa cell differentiation through disruption of the hypoxia-inducible factor 1 pathway. Mol Reprod Dev 2017; 84:1306-1313. [PMID: 29155477 DOI: 10.1002/mrd.22933] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2017] [Accepted: 11/06/2017] [Indexed: 12/22/2022]
Abstract
Obesity predisposes women to reproductive disorders. One symptom of obesity in women is higher levels of oxidized Low-density lipoprotein (oxLDL) in serum and preovulatory follicles. The present study was designed to test the hypothesis that oxLDL might impair follicle differentiation and luteinization. Given that Hypoxia-inducible factor 1 (HIF1) plays crucial roles in supporting follicle differentiation and luteinization in mammals, we focused on oxLDL-mediated events that may affect the HIF1 pathway. We report that exposure to oxLDL diminished the expression of HIF1α and its target genes and suppressed the differentiation of mouse luteinized granulosa cells following induction by human Chorionic gonadotophin (hCG) under hypoxic conditions (1% oxygen). Significantly, the proteasome inhibitor MG-132 prevented this oxLDL-attenuation differentiation phenotype by blocking HIF1α degradation. Together, these findings suggest that suppression of granulosa cell differentiation by oxLDL, via HIF1α down-regulation, may contribute the negative effects of obesity on female fertility.
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Affiliation(s)
- Xiaoliang Chen
- Departmentof Urology, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Yanhong Liu
- Centre for Reproductive Medicine, Centre for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, China
| | - Yanhong Shan
- Department of Obstetrics, First Hospital, Jilin University, Changchun, China
| | - Xingyi Jin
- Department of Neurosurgery, China-Japan Union Hospital, Jilin University, Changchun, China
| | - Qingyang Shi
- Centre for Reproductive Medicine, Centre for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, China
| | - Chunshu Jia
- Centre for Reproductive Medicine, Centre for Prenatal Diagnosis, First Hospital, Jilin University, Changchun, China
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Rizov M, Andreeva P, Dimova I. Molecular regulation and role of angiogenesis in reproduction. Taiwan J Obstet Gynecol 2017; 56:127-132. [PMID: 28420494 DOI: 10.1016/j.tjog.2016.06.019] [Citation(s) in RCA: 49] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/16/2016] [Indexed: 12/26/2022] Open
Abstract
Angiogenesis is an essential process for proper functioning of the female reproductive system and for successful pregnancy realization. The multitude of factors required for physiological angiogenesis and the complexity of regulation of their temporal-spatial activities contribute to aberrations in human fertilization and pregnancy outcomes. In this study, we reviewed the current knowledge of the temporal expression patterns, functions, and regulatory mechanisms of angiogenic factors during foliculogenesis, early implantation/placentation and embryo development, as well as recurrent spontaneous abortions. Angiogenic factors including vascular endothelial growth factors and angiopoietins have documented roles in the development of primordial follicles into mature antral follicles. They also participate in decidualization, which is accompanied by the creation of an extensive network of vessels in the stromal bed that support the growth of the embryo and the placenta, and maintain early pregnancy. During placentation angiogenic and angiomodulatory cytokines, T and B lymphocytes and macrophages affect angiogenesis in a context-dependent manner. Defects in angiogenesis at the maternal-fetal interface contribute to miscarriage in humans. The establishment of more polymorphisms in the genes involved in angiogenesis/vasculogenesis, and their pathological phenotype and expression could give opportunities for prediction, creating a therapeutic strategy, and treatment of diseases related to female reproductive health and problematic conception.
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Affiliation(s)
| | | | - Ivanka Dimova
- Department of Medical Genetics, Medical University Sofia, Sofia, Bulgaria.
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Abstract
Endocrine is an important and tightly regulated system for maintaining body homeostasis. Endocrine glands produce hormones, which are released into blood stream to guide the target cells responding to all sorts of stimulations. For maintaining body homeostasis, the secretion and activity of a particular hormone needs to be adjusted in responding to environmental challenges such as changes in nutritional status or chronic stress. Hypoxia, a status caused by reduced oxygen availability or imbalance of oxygen consumption/supply in an organ or within a cell, is a stress that affects many physiological and pathological processes. Hypoxic stress in endocrine organs is especially critical because endocrine glands control body homeostasis. Local hypoxia affects not only the particular gland but also the downstream cells/organs regulated by hormones secreted from this gland. Hypoxia-inducible factors (HIFs) are transcription factors that function as master regulators of oxygen homeostasis. Recent studies report that aberrant expression of HIFs in endocrine organs may result in the development and/or progression of diseases including diabetes, endometriosis, infertility and cancers. In this article, we will review recent findings in HIF-mediated endocrine organ dysfunction and the systemic syndromes caused by these disorders.
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Affiliation(s)
- Hsiu-Chi Lee
- Institute of Basic Medical SciencesCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
| | - Shaw-Jenq Tsai
- Institute of Basic Medical SciencesCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
- Department of PhysiologyCollege of Medicine, National Cheng Kung University, Tainan, Taiwan
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Guan SY, Leng RX, Tao JH, Li XP, Ye DQ, Olsen N, Zheng SG, Pan HF. Hypoxia-inducible factor-1α: a promising therapeutic target for autoimmune diseases. Expert Opin Ther Targets 2017; 21:715-723. [PMID: 28553732 DOI: 10.1080/14728222.2017.1336539] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
INTRODUCTION Hypoxia-inducible factor-1α (HIF-1α) plays a crucial role in both innate and adaptive immunity. Emerging evidence indicates that HIF-1α is associated with the inflammation and pathologic activities of autoimmune diseases. Areas covered: Considering that the types of autoimmune diseases are complicated and various, this review aims to cover the typical kinds of autoimmune diseases, discuss the molecular mechanisms, biological functions and expression of HIF-1α in these diseases, and further explore its therapeutic potential. Expert opinion: Inflammation and hypoxia are interdependent. HIF-1α as a key regulator of hypoxia, exerts a crucial role in the balance between Th17 and Treg, and involves in the inflammation and pathologic activities of autoimmune diseases. Although there are many challenges remaining to be overcome, targeting HIF-1α could be a promising strategy for autoimmune diseases therapies.
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Affiliation(s)
- Shi-Yang Guan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Rui-Xue Leng
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Jin-Hui Tao
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Xiang-Pei Li
- c Department of Rheumatology , Anhui Provincial Hospital , Hefei , China
| | - Dong-Qing Ye
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
| | - Nancy Olsen
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Song Guo Zheng
- d Division of Rheumatology , Penn State University Hershey College of Medicine , Hershey , PA , USA
| | - Hai-Feng Pan
- a Department of Epidemiology and Biostatistics, School of Public Health , Anhui Medical University , Hefei , China.,b Anhui provincial laboratory of population health & major disease screening and diagnosis , Hefei , China
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Li S, Wang J, Cheng Y, Zhou D, Yin T, Xu W, Yu N, Yang J. Intrauterine administration of hCG-activated autologous human peripheral blood mononuclear cells (PBMC) promotes live birth rates in frozen/thawed embryo transfer cycles of patients with repeated implantation failure. J Reprod Immunol 2017; 119:15-22. [DOI: 10.1016/j.jri.2016.11.006] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2016] [Revised: 10/20/2016] [Accepted: 11/23/2016] [Indexed: 01/26/2023]
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Fadhillah, Yoshioka S, Nishimura R, Yamamoto Y, Kimura K, Okuda K. Hypoxia-inducible factor 1 mediates hypoxia-enhanced synthesis of progesterone during luteinization of granulosa cells. J Reprod Dev 2016; 63:75-85. [PMID: 27840375 PMCID: PMC5320433 DOI: 10.1262/jrd.2016-068] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023] Open
Abstract
Hypoxia has been suggested to enhance progesterone (P4) synthesis in luteinizing granulosa cells (GCs), but the mechanism is unclear. The present study was designed to test the hypothesis that the hypoxia-induced increase in P4 synthesis during luteinization in bovine GCs is mediated by hypoxia-inducible factor 1 (HIF-1). GCs obtained from small antral follicles were cultured with 2 µg/ml insulin in combination with 10 µM forskolin for 24 h as a model of luteinizing GCs. To examine the influence of HIF-1 on P4 synthesis, we determined the effect of changes in protein expression of the α-subunit of HIF-1 (HIF1A) on P4 production and on the expression levels of StAR, P450scc, and 3β-HSD. CoCl2 (100 µM), a hypoxia-mimicking chemical, increased HIF-1α protein expression in luteinizing GCs. After the upregulation of HIF-1α, we observed an increase in P4 production and in the gene and protein expression levels of StAR in CoCl2-treated luteinizing GCs. In contrast, CoCl2 did not affect the expression of either P450scc or 3β-HSD. Echinomycin, a small-molecule inhibitor of HIF-1's DNA-binding activity, attenuated the effects of CoCl2 and of low oxygen tension (10% O2) on P4 production and StAR expression in luteinizing GCs. Overall, these findings suggest that HIF-1 is one of the factors that upregulate P4 in GCs during luteinization.
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Affiliation(s)
- Fadhillah
- Laboratory of Reproductive Physiology, Graduate School of Environmental and Life Sciences, Okayama University, Okayama 700-8530, Japan
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32
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Su M, Xu X, Wei W, Gao S, Wang X, Chen C, Zhang Y. Involvement of human chorionic gonadotropin in regulating vasculogenic mimicry and hypoxia-inducible factor-1α expression in ovarian cancer cells. Cancer Cell Int 2016; 16:50. [PMID: 27346985 PMCID: PMC4919850 DOI: 10.1186/s12935-016-0327-0] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2013] [Accepted: 06/08/2016] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Human chorionic gonadotropin (hCG) can play a crucial role in angiogenesis. In the present study, we focused on hCG to gain insight into its potential effects on vasculogenic mimicry (VM) in ovarian cancer cells. METHODS Ovarian cancer OVCAR-3 cells were incubated with different concentrations of recombinant hCG in 3-dimensional cultures. VM was identified by morphological observations and vascular endothelial cell marker detection in OVCAR-3 cells. Expression of hCG, hypoxia-inducible factor-1α (HIF-1α), and the endothelial cell markers CD31, VEGF, and factor VIII were detected by reverse transcription polymerase chain reaction and western blotting. The effect of hCG on endothelial cell-marker expression in ovarian cancer cells was further explored using small interfering RNA (siRNA) and plasmid-based approaches. RESULTS Incubation of OVCAR-3 cells with recombinant hCG induced vessel-like network formation, which was accompanied by significant elevation of vascular marker expression. Attenuation of hCG expression by siRNA in OVCAR-3 cells suppressed the expression of endothelial cell markers and HIF-1α by tumour cells. Overexpression of hCG in OVCAR-3 cells resulted in increased expression of endothelial cell markers and HIF-1α. CONCLUSIONS HCG was crucial for changing the phenotype of OVCAR-3 cells to endothelial-like cells. The effect of hCG induction on VM in ovarian cancer cells is potentially associated with HIF-1α.
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Affiliation(s)
- Min Su
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Nantong University, No 20, Xisi Rd, Nantong, 226001 People's Republic of China
| | - Xiangxiang Xu
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Nantong University, No 20, Xisi Rd, Nantong, 226001 People's Republic of China.,Suzhou Municipal Hospital, Suzhou, China
| | - Weiwei Wei
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Nantong University, No 20, Xisi Rd, Nantong, 226001 People's Republic of China.,Changzhou 2nd People's Hospital, Changzhou, China
| | - Sainan Gao
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Nantong University, No 20, Xisi Rd, Nantong, 226001 People's Republic of China
| | - Xiaoying Wang
- The Immunology Laboratory of Nantong University, Nantong, China
| | - Caoyi Chen
- Department of Genetics, College of Life Sciences, Nantong University, Nantong, Jiangsu China
| | - Yuquan Zhang
- Department of Obstetrics and Gynecology, The Affiliated Hospital of Nantong University, No 20, Xisi Rd, Nantong, 226001 People's Republic of China
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Takahashi N, Harada M, Hirota Y, Zhao L, Yoshino O, Urata Y, Izumi G, Takamura M, Hirata T, Koga K, Wada-Hiraike O, Fujii T, Osuga Y. A potential role of endoplasmic reticulum stress in development of ovarian hyperstimulation syndrome. Mol Cell Endocrinol 2016; 428:161-9. [PMID: 27032713 DOI: 10.1016/j.mce.2016.03.032] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/12/2016] [Accepted: 03/25/2016] [Indexed: 02/06/2023]
Abstract
Vascular endothelial growth factor A (VEGFA) is crucial for ovarian angiogenesis, but its excess production induces ovarian hyperstimulation syndrome (OHSS). The aim of this study was to determine whether endoplasmic reticulum (ER) stress regulates VEGFA expression in granulosa cells, and whether its activation is involved in OHSS development. The expression of the spliced form of X-box-binding protein 1 [XBP1(S)], induced by ER stress, in cumulus cells from OHSS patients was higher than that in cumulus cells from non-OHSS patients. The ER stress inducer tunicamycin increased human chorionic gonadotropin-induced VEGFA production in human granulosa cells through the induction of XBP1(S), and pretreatment with the ER stress inhibitor tauroursodeoxycholic acid (TUDCA) abrogated the effect of tunicamycin. In OHSS model rats, TUDCA administration prevented the OHSS development, reducing ovarian VEGFA production. Our findings suggest ER stress upregulates hCG-induced VEGFA production in granulosa cells, indicating that ER stress might be involved in OHSS development.
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Affiliation(s)
- Nozomi Takahashi
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Miyuki Harada
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan.
| | - Yasushi Hirota
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Lin Zhao
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital of Dalian Medical University, Dalian, Liaoning, 116044, PR China
| | - Osamu Yoshino
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Toyama, 2630 Sugitani, Toyama, 930-0194, Japan
| | - Yoko Urata
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Gentaro Izumi
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Masashi Takamura
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Tetsuya Hirata
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Kaori Koga
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Osamu Wada-Hiraike
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Tomoyuki Fujii
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
| | - Yutaka Osuga
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tokyo, 7-3-1, Hongo, Bunkyo, Tokyo, 113-8655, Japan
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Opiate receptor blockade on human granulosa cells inhibits VEGF release. Reprod Biomed Online 2016; 32:316-22. [DOI: 10.1016/j.rbmo.2015.12.006] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Revised: 12/17/2015] [Accepted: 12/22/2015] [Indexed: 12/22/2022]
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Bar-Joseph H, Ben-Ami I, Ron-El R, Shalgi R, Chuderland D. Pigment epithelium-derived factor regulation by human chorionic gonadotropin in granulosa cells. Reproduction 2016; 151:179-85. [DOI: 10.1530/rep-15-0478] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/18/2015] [Accepted: 11/26/2015] [Indexed: 02/02/2023]
Abstract
Human chorionic gonadotropin (hCG) is a known trigger of ovarian hyperstimulation syndrome (OHSS), a potentially life-threatening complication of assisted reproduction. Administration of hCG results in the release of vascular endothelial growth factor (VEGF) from the ovary. We have previously shown that expression of pigment epithelium-derived factor (PEDF) in granulosa cell line is regulated by hCG, reciprocally to VEGF, and that the PEDF–VEGF balance is impaired in OHSS. Our aim was to explore the signaling network by which hCG downregulates the expression of PEDF mRNA and protein in granulosa cells. We applied specific chemical inhibitors and stimuli to human primary granulosa cells and rat granulosa cell line. We found that PKA and protein kinase C, as well as EGFR, ERK1/2 and PI3K, participate in the signaling network. The finding that hCG-induced PEDF downregulation and VEGF upregulation are mediated by similar signaling cascades emphasizes the delicate regulation of ovarian angiogenesis.
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Chouhan V, Dangi S, Babitha V, Verma M, Bag S, Singh G, Sarkar M. Stimulatory effect of luteinizing hormone, insulin-like growth factor-1, and epidermal growth factor on vascular endothelial growth factor production in cultured bubaline luteal cells. Theriogenology 2015; 84:1185-96. [DOI: 10.1016/j.theriogenology.2015.06.020] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2014] [Revised: 06/21/2015] [Accepted: 06/26/2015] [Indexed: 01/11/2023]
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Wu L, Zhang Z, Pan X, Wang Z. Expression and contribution of the HIF-1α/VEGF signaling pathway to luteal development and function in pregnant rats. Mol Med Rep 2015; 12:7153-9. [PMID: 26323652 DOI: 10.3892/mmr.2015.4268] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/13/2014] [Accepted: 08/04/2015] [Indexed: 11/06/2022] Open
Abstract
Vascular endothelial growth factor (VEGF) is vital in normal and abnormal angiogenesis in the ovary, particularly during the early development of the corpus luteum in the ovary. However, the molecular regulation of the expression VEGF during luteal development in vivo remains to be fully elucidated. As the expression of VEGF is mediated by hypoxia‑inducible factor (HIF)‑1α in luteal cells cultured in vitro, determined in our previous study, the present study was performed to confirm the hypothesis that HIF‑1α is induced and then regulates the expression of VEGF and VEGF‑dependent luteal development/function in vivo. This was investigated using a pregnant rat model treated with a small‑molecule inhibitor of HIF‑1α, echinomycin (Ech). The development of the corpus luteum in the pregnant rat ovary was identified via performing assays of the serum progesterone, testosterone and estradiol concentrations by radioimmunoassay, accompanied with determination of the changes in the expression levels of HIF‑1α and VEGF by reverse transcription‑quantitative polymerase chain reaction at different days of the developmental process. On day 5, serum progesterone levels were markedly increased, whereas serum levels of testosterone and estradiol did not change significantly. On day 17, the highest level of serum progesterone was observed, however, this was not the case for testosterone and estradiol. Further analysis of the expression levels of HIF‑1α and VEGF revealed that their changes were consistent with the changes in serum levels of progesterone, which occurred in the development of the corpus luteum in the ovaries of pregnant rats. Further investigation demonstrated that Ech inhibited luteal development through inhibiting the expression of VEGF, mediated by HIF‑1α, and subsequent luteal function, which was determined by detecting changes in serum progesterone on days 8 and 14. Taken together, these results demonstrated that HIF‑1α‑mediated expression of VEGF may be one of the important mechanisms regulating ovarian luteal development in mammals in vivo, which may provide novel strategies in treatment for fertility control and for certain types of ovarian dysfunction, including polycystic ovarian syndrome, ovarian hyperstimulation syndrome and ovarian neoplasia.
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Affiliation(s)
- Lixiang Wu
- Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350108, P.R. China
| | - Zhenghong Zhang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350108, P.R. China
| | - Xiaoyan Pan
- Department of Histology and Embryology, Jilin Medical College, Jilin, Jilin 132013, P.R. China
| | - Zhengchao Wang
- Provincial Key Laboratory for Developmental Biology and Neurosciences, College of Life Sciences, Fujian Normal University, Fuzhou, Fujian 350108, P.R. China
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Yalu R, Oyesiji AE, Eisenberg I, Imbar T, Meidan R. HIF1A-dependent increase in endothelin 2 levels in granulosa cells: role of hypoxia, LH/cAMP, and reactive oxygen species. Reproduction 2015; 149:11-20. [PMID: 25433027 DOI: 10.1530/rep-14-0409] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Hypoxia-inducible factor 1 alpha (HIF1A) and endothelin 2 (EDN2) are transiently expressed during the same time window in the developing corpus luteum (CL). In this study, we sought to investigate the involvement of LH/cAMP, reactive oxygen species (ROS), and a hypoxia-mimetic compound (CoCl2) on HIF1A expression and how it affected EDN2 levels, using transformed human granulosa cells (thGCs) and primary bovine granulosa cells (GCs). CoCl2 elevated HIF1A protein levels in thGCs in a dose-dependent manner. Forskolin alone had no significant effect; however, forskolin and CoCl2 together further induced HIF1A protein and EDN2 mRNA expression in thGCs. Similarly, in primary GCs, LH with CoCl2 synergistically augmented HIF1A protein levels, which resulted in higher expression of EDN2 and another well-known hypoxia-inducible gene, VEGF (VEGFA). Importantly, LH alone elevated HIF1A mRNA but not its protein. The successful knockdown of HIF1A in thGCs using siRNA abolished hypoxia-induced EDN2 and also the additive effect of forskolin and CoCl2. We then examined the roles of ROS in thGCs: hydrogen peroxide (20 and 50 μM) elevated HIF1A protein as well as the expression of EDN2, implying that induction of HIF1A protein levels is sufficient to stimulate the expression of EDN2 (and VEGF) in normoxia. A broad-range ROS scavenger, butylated hydroxyanisole, inhibited CoCl2-induced HIF1A protein with a concomitant reduction in the mRNA expression of EDN2 and VEGF in thGCs. The results obtained in this study suggest that HIF1A, induced by various stimuli, is an essential mediator of EDN2 mRNA expression. The results may also explain the rise in the levels of HIF1A-dependent genes (EDN2 and VEGF) in the developing CL.
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Affiliation(s)
- Ronit Yalu
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Adepeju Esther Oyesiji
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Iris Eisenberg
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Tal Imbar
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
| | - Rina Meidan
- Department of Animal SciencesThe Robert H. Smith Faculty of Agriculture, Food, and Environment, The Hebrew University of Jerusalem, Herzl Street, Rehovot 76100, IsraelIVF UnitDepartment of Obstetrics and Gynecology, Hadassah Hebrew University Medical Center, Mount Scopus, Jerusalem, Israel
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Thompson JG, Brown HM, Kind KL, Russell DL. The Ovarian Antral Follicle: Living on the Edge of Hypoxia or Not?1. Biol Reprod 2015; 92:153. [DOI: 10.1095/biolreprod.115.128660] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/27/2015] [Accepted: 04/22/2015] [Indexed: 11/01/2022] Open
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Zhang Z, Pang X, Tang Z, Yin D, Wang Z. Overexpression of hypoxia-inducible factor prolyl hydoxylase-2 attenuates hypoxia-induced vascular endothelial growth factor expression in luteal cells. Mol Med Rep 2015; 12:3809-3814. [PMID: 25975603 DOI: 10.3892/mmr.2015.3788] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2014] [Accepted: 04/15/2015] [Indexed: 11/06/2022] Open
Abstract
Vascular endothelial growth factor (VEGF)-dependent angiogenesis has a crucial role in the corpus luteum formation and their functional maintenances in mammalian ovaries. A previous study by our group reported that activation of hypoxia‑inducible factor (HIF)‑1α signaling contributes to the regulation of VEGF expression in the luteal cells (LCs) in response to hypoxia and human chorionic gonadotropin. The present study was designed to test the hypothesis that HIF prolyl‑hydroxylases (PHDs) are expressed in LCs and overexpression of PHD2 attenuates the expression of VEGF induced by hypoxia in LCs. PHD2-overexpressing plasmid was transfected into LC2 cells, and successful plasmid transfection and expression was confirmed by reverse transcription quantitative polymerase chain reaction and western blot analysis. In addition, the present study investigated changes of HIF‑1α and VEGF expression after incubation under hypoxic conditions and PHD2 transfection. PHD2 expression was significantly higher expressed than the other two PHD isoforms, indicating its major role in LCs. Moreover, a significant increase of VEGF mRNA expression was identified after incubation under hypoxic conditions, which was, however, attenuated by PHD2 overexpression in LCs. Further analysis also indicated that this hypoxia‑induced increase in the mRNA expression of VEGF was consistent with increases in the protein levels of HIF‑1α, which is regulated by PHD-mediated degradation. In conclusion, the results of the present study indicated that PHD2 is the main PHD expressed in LCs and hypoxia‑induced VEGF expression can be attenuated by PHD2 overexpression through HIF‑1α‑mediated mechanisms in LCs. This PHD2-mediated transcriptional activation may be one of the mechanisms regulating VEGF expression in LCs during mammalian corpus luteum development.
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Affiliation(s)
- Zhenghong Zhang
- Provincial Key Laboratory for Developmental Biology and Neurobiology, College of Life Science, Fujian Normal University, Fuzhou, Fujian 350007, P.R. China
| | - Xunsheng Pang
- Provincial Key Laboratory for Developmental Biology and Neurobiology, College of Life Science, Fujian Normal University, Fuzhou, Fujian 350007, P.R. China
| | - Zonghao Tang
- Provincial Key Laboratory for Developmental Biology and Neurobiology, College of Life Science, Fujian Normal University, Fuzhou, Fujian 350007, P.R. China
| | - Dingzhong Yin
- Provincial Key Laboratory for Developmental Biology and Neurobiology, College of Life Science, Fujian Normal University, Fuzhou, Fujian 350007, P.R. China
| | - Zhengchao Wang
- Provincial Key Laboratory for Developmental Biology and Neurobiology, College of Life Science, Fujian Normal University, Fuzhou, Fujian 350007, P.R. China
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Nishimura R, Okuda K. Multiple roles of hypoxia in ovarian function: roles of hypoxia-inducible factor-related and -unrelated signals during the luteal phase. Reprod Fertil Dev 2015; 28:RD15010. [PMID: 25940685 DOI: 10.1071/rd15010] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/08/2015] [Accepted: 03/13/2015] [Indexed: 02/28/2024] Open
Abstract
There is increasing interest in the role of oxygen conditions in the microenvironment of organs because of the discovery of a hypoxia-specific transcription factor, namely hypoxia-inducible factor (HIF) 1. Ovarian function has several phases that change day by day, including ovulation, follicular growth and corpus luteum formation and regression. These phases are regulated by many factors, including pituitary hormones and local hormones, such as steroids, peptides and cytokines, as well as oxygen conditions. Hypoxia strongly induces angiogenesis because transcription of the potent angiogenic factor vascular endothelial growth factor (VEGF) is regulated by HIF1. Follicular development and luteal formation are accompanied by a marked increase in angiogenesis assisted by HIF1-VEGF signalling. Hypoxia is also one of the factors that induces luteolysis by suppressing progesterone synthesis and by promoting apoptosis of luteal cells. The present review focuses on recent studies of hypoxic conditions, as well as HIF1-regulated genes and proteins, in the regulation of ovarian function.
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Schanz A, Lukosz M, Hess AP, Baston-Büst DM, Krüssel JS, Heiss C. hCG stimulates angiogenic signals in lymphatic endothelial and circulating angiogenic cells. J Reprod Immunol 2015; 110:102-8. [PMID: 25843522 DOI: 10.1016/j.jri.2015.01.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2014] [Revised: 12/31/2014] [Accepted: 01/30/2015] [Indexed: 12/13/2022]
Abstract
Human chorionic gonadotropin (hCG) has long been associated with the initiation and maintenance of pregnancy, where angiogenesis plays an important role. However, the function of hCG in angiogenesis and the recruitment of vascular active cells are not fully understood. In this study, the role of hCG and its receptor in circulating angiogenic and human endothelial cells, including lymphatic, uterine microvascular, and umbilical vein endothelial cells, was examined. Immunohistochemistry and immunoblot analysis were used to detect LH/hCG receptor expression and the expression of hCG-induced angiogenic molecules. HIF-1α was determined via ELISA and downstream molecules, such as CXCL12 and CXCR4, via real-time PCR. Chemotaxis was analyzed using Boyden chambers. Our results show that the LH/hCG receptor was present in all tested cells. Furthermore, hCG was able to stimulate LH/hCG-receptor-specific migration in a dose-dependent fashion and induce key angiogenic molecules, including HIF-1α, CXCL12, and CXCR4. In conclusion, our findings underscore the importance of hCG as one of the first angiogenic molecules produced by the conceptus. hCG itself alters endothelial motility, recruitment, and expression of pro-angiogenic molecules and may therefore play an important role in vascular adaption during implantation and early placental formation.
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Affiliation(s)
- Andrea Schanz
- University Düsseldorf, Medical Faculty, Department of Obstetrics, Gynecology and REI (UniKiD), Moorenstrasse 5, 40225 Düsseldorf, Germany.
| | - Margarete Lukosz
- University Düsseldorf, Medical Faculty, Division of Cardiology, Pulmonology, and Vascular Medicine, Moorenstrasse 5, 40225 Düsseldorf, Germany(1).
| | - Alexandra P Hess
- University Düsseldorf, Medical Faculty, Department of Obstetrics, Gynecology and REI (UniKiD), Moorenstrasse 5, 40225 Düsseldorf, Germany.
| | - Dunja M Baston-Büst
- University Düsseldorf, Medical Faculty, Department of Obstetrics, Gynecology and REI (UniKiD), Moorenstrasse 5, 40225 Düsseldorf, Germany.
| | - Jan S Krüssel
- University Düsseldorf, Medical Faculty, Department of Obstetrics, Gynecology and REI (UniKiD), Moorenstrasse 5, 40225 Düsseldorf, Germany.
| | - Christian Heiss
- University Düsseldorf, Medical Faculty, Division of Cardiology, Pulmonology, and Vascular Medicine, Moorenstrasse 5, 40225 Düsseldorf, Germany(1); Department of Cardiology, University of California San Francisco, 505 Parnassus Avenue, San Francisco, CA 94143, USA(2).
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Brown HM, Anastasi MR, Frank LA, Kind KL, Richani D, Robker RL, Russell DL, Gilchrist RB, Thompson JG. Hemoglobin: a gas transport molecule that is hormonally regulated in the ovarian follicle in mice and humans. Biol Reprod 2014; 92:26. [PMID: 25395682 DOI: 10.1095/biolreprod.114.124594] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022] Open
Abstract
An increasing number of nonerythroid tissues are found to express hemoglobin mRNA and protein. Hemoglobin is a well-described gas transport molecule, especially for O2, but also for NO, CO2, and CO, and also acts as a reactive oxygen species scavenger. We previously found Hba-a1 and Hbb mRNA and protein at high levels within mouse periovulatory cumulus cells, but not in cumulus following in vitro maturation. This led us to investigate the temporal and spatial regulation in follicular cells during the periovulatory period. Cumulus-oocyte complexes were collected from equine chorionic gonadotropin/human chorionic gonadotropin-treated peripubertal SV129 female mice and collected and analyzed for gene expression and protein localization at a variety of time points over the periovulatory period. A further cohort matured in vitro with different forms of hemoglobin (ferro- and ferrihemoglobin) under different O2 atmospheric conditions (2%, 5%, and 20% O2) were subsequently fertilized in vitro and cultured to the blastocyst stage. Murine mRNA transcripts for hemoglobin were regulated by stimulation of the ovulatory cascade, in both granulosa and cumulus cells, and expression of HBA1 and HBB was highly significant in human granulosa and cumulus, but erythrocyte cell marker genes were not. Several other genes involved in hemoglobin function were similarly luteinizing hormone-regulated, including genes for heme biosynthesis. Immunohistochemistry revealed a changing localization pattern of HBA-A1 protein in murine cumulus cells and oocytes following the ovulatory signal. Significantly, no positive staining for HBA-A1 protein was observed within in vitro-matured oocytes, but, if coincubated with ferro- or ferrihemoglobin, cytoplasmic HBA-A1 was observed, similar to in vivo-derived oocytes. Addition of ferro-, but not ferrihemoglobin, had a small, positive effect on blastocyst yield, but only under either 2% or 20% O2 gas atmosphere. The identification of hemoglobin within granulosa and cumulus cells poses many questions as to its function in these cells. There are several possible roles, the most likely of which is either an O2 or NO sequestering molecule; perhaps both roles are engaged. The strong endocrine regulation during the periovulatory period suggests to us that one potential function of hemoglobin is to provide a short-lived hypoxic environment by binding very tightly any available O2. This, in turn, facilitates the differentiation of the follicle towards corpus luteum formation by enabling the stabilization of a key transcription factor known to initiate such differentiation: hypoxia inducible factor.
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Affiliation(s)
- Hannah M Brown
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Marie R Anastasi
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Laura A Frank
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Karen L Kind
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Dulama Richani
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Rebecca L Robker
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Darryl L Russell
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Robert B Gilchrist
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia
| | - Jeremy G Thompson
- School of Pediatrics and Reproductive Health, School of Animal and Veterinary Sciences, Robinson Research Institute, University of Adelaide, Adelaide, South Australia, Australia Centre of Excellence for Nanoscale BioPhotonics, University of Adelaide, Adelaide, South Australia, Australia
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Tamura K, Yoshie M, Hashimoto K, Tachikawa E. Inhibitory effect of insulin-like growth factor-binding protein-7 (IGFBP7) on in vitro angiogenesis of vascular endothelial cells in the rat corpus luteum. J Reprod Dev 2014; 60:447-53. [PMID: 25212428 PMCID: PMC4284319 DOI: 10.1262/jrd.2014-069] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/05/2022] Open
Abstract
Angiogenesis in the developing corpus luteum (CL) is a prerequisite for establishment and maintenance of an early pregnancy. To explore the physiological significance of insulin-like growth factor-binding protein-7 (IGFBP7) in the developing CL, the effects of IGFBP7 on vascular endothelial growth factor (VEGFA)- and luteinizing hormone (LH)-induced in vitro tube formation were tested using isolated luteal microvascular endothelial cells (LECs). Capillary-like tube formation of LECs and their proliferation were stimulated by both VEGFA and LH. IGFBP7 treatment suppressed VEGFA- or LH-induced tube formation. The proliferation and migration of LECs, and phosphorylation of mitogen-activated protein kinase kinase and extracellular signal-regulated kinase 1/2 were inhibited by IGFBP7. Furthermore, IGFBP7 attenuated VEGFA-enhanced cyclooxygenase (COX)-2 mRNA expression and prostaglandin E2 secretion. These findings suggest the possibility that
luteal IGFBP7 secretion may suppress the stimulatory effect of VEGFA on angiogenesis in the early CL.
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Affiliation(s)
- Kazuhiro Tamura
- Department of Endocrine and Neural Pharmacology, Tokyo University of Pharmacy and Life Sciences, Tokyo 192-0392, Japan
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Rico C, Dodelet-Devillers A, Paquet M, Tsoi M, Lapointe E, Carmeliet P, Boerboom D. HIF1 activity in granulosa cells is required for FSH-regulated Vegfa expression and follicle survival in mice. Biol Reprod 2014; 90:135. [PMID: 24855100 DOI: 10.1095/biolreprod.113.115634] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Recent evidence has suggested that vascular endothelial growth factor A (VEGFA) is an important regulator of ovarian follicle development and survival. Both LH and FSH regulate Vegfa expression in granulosa cells and signal via the transcription factor hypoxia inducible factor 1 (HIF1). To further study the mechanism of action of HIF1 in the regulation of Vegfa, we studied Vegfa(delta/delta) mice, which lack a hypoxia response element in the Vegfa promoter. Granulosa cells from Vegfa(delta/delta) mice failed to respond to FSH or LH with an increase in Vegfa mRNA expression in vitro, and granulosa cells isolated from eCG-treated immature Vegfa(delta/delta) mice had significantly lower Vegfa mRNA levels compared to controls. However, normal Vegfa mRNA levels were detected in the granulosa cells from immature Vegfa(delta/delta) mice following hCG treatment. Vegfa(delta/delta) females produced infrequent litters, and their pups died shortly after birth. Ovaries from Vegfa(delta/delta) mice were much smaller than controls and contained few antral follicles and corpora lutea. Antral follicles numbers were decreased by nearly 50% in ovaries from Vegfa(delta/delta) mice relative to controls, and 74% of antral follicles in Vegfa(delta/delta) ovaries were atretic. Serum progesterone levels in adult Vegfa(delta/delta) females were significantly lower, apparently reflecting reduced numbers of corpora lutea. This study demonstrates for the first time the requirement of HIF1 for FSH-regulated Vegfa expression in vivo and that HIF1 acts via a single hypoxia response element in the Vegfa promoter to exert its regulatory functions. Our findings also further define the physiological role of VEGFA in follicle development.
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Affiliation(s)
- Charlène Rico
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Aurore Dodelet-Devillers
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Marilène Paquet
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Mayra Tsoi
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Evelyne Lapointe
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
| | - Peter Carmeliet
- Laboratory of Angiogenesis and Neurovascular Link, Vesalius Research Center, VIB, Leuven, Belgium Laboratory of Angiogenesis and Neurovascular Link, Department of Oncology, KU Leuven, Belgium
| | - Derek Boerboom
- Centre de Recherche en Reproduction Animale, Université de Montréal, St-Hyacinthe, Québec, Canada
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Fadhillah, Yoshioka S, Nishimura R, Okuda K. Hypoxia promotes progesterone synthesis during luteinization in bovine granulosa cells. J Reprod Dev 2014; 60:194-201. [PMID: 24583842 PMCID: PMC4085383 DOI: 10.1262/jrd.2014-014] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
To determine whether hypoxia has an effect on luteinization, we examined the influence of hypoxia on a model of bovine luteinizing and non-luteinizing granulosa cell culture. The granulosa cells were obtained from small antral follicles (≤ 6 mm in diameter). To induce luteinization, the cells were treated for 24 h with insulin (2 µg/ml), forskolin (10 µM) or insulin in combination with forskolin at 20% O2. After 24 h, progesterone (P4) production was higher in the treated cells, which we defined as luteinizing granulosa cells, than in non-treated cells, which we defined as non-luteinizing granulosa cells. P4 production by non-luteinizing granulosa cells was not affected by hypoxia (24 h at 10% and 5% O2), while P4 production by granulosa cells treated with insulin in combination with forskolin was significantly increased under hypoxia (24 h at 10% and 5% O2). Because hypoxia affected P4 production by the luteinizing granulosa cells but not by the non-luteinizing granulosa cells, hypoxia seems to promote P4 production during, rather than before, luteinization. In the cells treated with insulin in combination with forskolin, mRNA and protein expression of steroidogenic acute regulatory protein (StAR) and protein expression of 3β-hydroxysteroid dehydrogenase (3β-HSD) increased under 10% O2, while mRNA and protein expressions of key protein and enzymes in P4 biosynthesis did not increase under 5% O2. The overall results suggest that hypoxia plays a role in progressing and completing the luteinization by enhancing P4 production through StAR as well as 3β-HSD expressions in the early time of establishing the corpus luteum.
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Affiliation(s)
- Fadhillah
- Laboratory of Reproductive Physiology, Graduate School of Environmental and Life Science, Okayama University, Okayama 700-8530, Japan
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Papa PDC, Sousa LMMDC, Silva RDS, de Fátima LA, da Fonseca VU, do Amaral VC, Hoffmann B, Alves-Wagner AB, Machado UF, Kowalewski MP. Glucose transporter 1 expression accompanies hypoxia sensing in the cyclic canine corpus luteum. Reproduction 2014; 147:81-9. [DOI: 10.1530/rep-13-0398] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
The canine corpus luteum (CL) functions as a source of progesterone (P4) and 17β-oestradiol (E2); however, the transport of energy substrates to maintain its high hormonal output has not yet been characterised. This study involved the localisation and temporal distribution of the facilitative glucose transporter 1 and the quantification of the corresponding protein (GLUT1) and gene (SLC2A1) expression. Some GLUT1/SLC2A1 regulatory proteins, such as hypoxia-inducible factor 1α (HIF1A) and fibroblast growth factor 2 (FGF2); mRNAs, such as HIF1A, FGF2 and vascular endothelial growth factor A (VEGFA); and VEGFA receptors 1 and 2 (FLT1 and KDR) were also analysed from days 10 to 70 after ovulation. Additionally, plasma P4 and E2 levels were assessed via chemiluminescence. Moreover, the canine KDR sequence has been cloned, thereby enabling subsequent semi-quantitative PCR analysis. Our results demonstrate time-dependent variations in the expression profile of SLC2A1 during dioestrus, which were accompanied by highly correlated changes (0.84<r<0.98; P<0.03) in the gene expression of HIF1A, VEGF and FLT1 as well as in P4 plasma concentrations. FGF2 mRNA correlated with E2 plasma concentrations (r=0.61; P=0.01). Our data reveal that the glucose transporter is regulated throughout the CL lifespan and suggest that CL depends on the sensing of hypoxia and the status of luteal vascularisation. Moreover, time-dependent expression of GLUT1/SLC2A1 may lie underneath increased metabolic and energetic requirements for sustaining P4 production.
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Endocrine and local control of the primate corpus luteum. Reprod Biol 2013; 13:259-71. [PMID: 24287034 DOI: 10.1016/j.repbio.2013.08.002] [Citation(s) in RCA: 53] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2013] [Accepted: 08/30/2013] [Indexed: 12/16/2022]
Abstract
The primate corpus luteum is a transient endocrine gland that differentiates from the ovulatory follicle midway through the ovarian (menstrual) cycle. Its formation and limited lifespan is critical for fertility, as luteal-derived progesterone is the essential steroid hormone required for embryo implantation and maintenance of intra-uterine pregnancy until the placenta develops. It is well-established that LH and the LH-like hormone, CG, are the vital luteotropic hormones during the menstrual cycle and early pregnancy, respectively. Recent advances, particularly through genome analyses and cellular studies, increased our understanding of various local factors and cellular processes associated with the development, maintenance and repression of the corpus luteum. These include paracrine or autocrine factors associated with angiogenesis (e.g., VEGF), and that mediate LH/CG actions (e.g., progesterone), or counteract luteotropic effects (i.e., local luteolysis; e.g., PGF2α). However, areas of mystery and controversy remain, particularly regarding the signals and events that initiate luteal regression in the non-fecund cycle. Novel approaches capable of gene "knockdown" or amplification", in vivo as well as in vitro, should identify novel or underappreciated gene products that are regulated by or modulate LH/CG actions to control the functional lifespan of the primate corpus luteum. Further advances in our understanding of luteal physiology will help to improve or control fertility for purposes ranging from preservation of endangered primate species to designing novel ovary-based contraceptives and treating ovarian disorders in women.
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Meidan R, Klipper E, Zalman Y, Yalu R. The role of hypoxia-induced genes in ovarian angiogenesis. Reprod Fertil Dev 2013; 25:343-50. [PMID: 22950963 DOI: 10.1071/rd12139] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/30/2012] [Accepted: 07/26/2012] [Indexed: 01/23/2023] Open
Abstract
The hypoxic microenvironment that occurs in fast-growing tissue such as the corpus luteum (CL) is a major contributor to its ability to survive via the induction of an intricate vascular network. Cellular responses to hypoxia are mediated by hypoxia-inducible factor-1 (HIF-1), an oxygen-regulated transcriptional activator. HIF-1, a heterodimer consisting of a constitutively-expressed β subunit and an oxygen-regulated α subunit, binds to the hypoxia responsive element (HRE) present in the promoter regions of responsive genes. This review summarises evidence for the involvement of hypoxia and HIF-1α in CL development and function. Special emphasis is given to hypoxia-induced, luteal cell-specific expression of multiple genes (vascular endothelial growth factor A (VEGFA), fibroblast growth factor 2 (FGF-2), prokineticin receptor 2 (PK-R2), stanniocalcin 1 (STC-1) and endothelin 2 (EDN-2) that participate in the angiogenic process during CL formation.
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Affiliation(s)
- Rina Meidan
- Department of Animal Sciences, The Hebrew University of Jerusalem, The Robert H. Smith Faculty of Agriculture, Food and Environment, Rehovot 76100, Israel.
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