1
|
Kondo M, Ikenaka Y, Nakayama SMM, Kawai YK, Mizukawa H, Mitani Y, Nomyama K, Tanabe S, Ishizuka M. Sulfotransferases (SULTs), enzymatic and genetic variation in Carnivora: Limited sulfation capacity in pinnipeds. Comp Biochem Physiol C Toxicol Pharmacol 2023; 263:109476. [PMID: 36182081 DOI: 10.1016/j.cbpc.2022.109476] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/09/2022] [Revised: 09/13/2022] [Accepted: 09/25/2022] [Indexed: 10/14/2022]
Abstract
Wild carnivorans are one of the most important species due to their high positions in the food chain. They are also highly affected by numerous environmental contaminants through bioaccumulation and biomagnification. Xenobiotic metabolism is a significant chemical defense system from xenobiotics because it degrades the activity of a wide range of chemicals, generally into less active forms, resulting in their deactivation. Sulfotransferases (SULTs) are one of the most important xenobiotic metabolic enzymes, which catalyze the sulfonation of a variety of endogenous and exogenous chemicals, such as hormones, neurotransmitters, and a wide range of xenobiotic compounds. Although SULTs are of such high importance, little research has focused on these enzymes in wild carnivorans. In this study, we clarified the genetic properties of SULTs in a wide range of mammals, focusing on carnivorans, using in silico genetic analyses. We found genetic deficiencies of SULT1E1 and SULT1D1 isoforms in all pinnipeds analyzed and nonsense mutations in SULT1Cs in several carnivorans including pinnipeds. We further investigated the enzymatic activity of SULT1E1 in vitro using liver cytosols from pinnipeds. Using a SULT1E1 probe substrate, we found highly limited estradiol sulfonation in pinnipeds, whereas other mammals had relatively high sulfation. These results suggest that pinnipeds have severely or completely absent SULT1E1 activity, which importantly catalyzes the metabolism of estrogens, drugs, and environmental toxins. This further implies a high susceptibility to a wide range of xenobiotics in these carnivorans, which are constantly exposed to environmental chemicals throughout their lifetime.
Collapse
Affiliation(s)
- Mitsuki Kondo
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Faculty of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan(1)
| | - Yoshinori Ikenaka
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Faculty of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan(1); Water Research Group, Unit for Environmental Sciences and Management, North-West University, Potchefstroom, South Africa; Translational Research Unit, Veterinary Teaching Hospital, Faculty of Veterinary Medicine, Hokkaido University, Japan; One Health Research Center, Hokkaido University, Japan
| | - Shouta M M Nakayama
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Faculty of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan(1); Biomedical Sciences Department, School of Veterinary Medicine, The University of Zambia, P.O. Box 32379, Lusaka 10101, Zambia
| | - Yusuke K Kawai
- Laboratory of Toxicology, Department of Veterinary Medicine, Obihiro University of Agriculture and Veterinary Medicine, Obihiro 080-8555, Japan(2)
| | - Hazuki Mizukawa
- Department of Science and Technology for Biological Resources and Environment, Graduate School of Agriculture, Ehime University, Tarumi 3-5-7, Matsuyama 790-8566, Japan
| | - Yoko Mitani
- Field Science Center for Northern Biosphere, Hokkaido University, N11, W10, Kita-ku, Sapporo 060-0811, Japan(3)
| | - Kei Nomyama
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan(4)
| | - Shinsuke Tanabe
- Center for Marine Environmental Studies (CMES), Ehime University, Bunkyo-cho 2-5, Matsuyama 790-8577, Japan(4)
| | - Mayumi Ishizuka
- Laboratory of Toxicology, Department of Environmental Veterinary Science, Faculty of Veterinary Medicine, Hokkaido University, N18, W9, Kita-ku, Sapporo 060-0818, Japan(1).
| |
Collapse
|
2
|
Mara JN, Zhou LT, Larmore M, Johnson B, Ayiku R, Amargant F, Pritchard MT, Duncan FE. Ovulation and ovarian wound healing are impaired with advanced reproductive age. Aging (Albany NY) 2020; 12:9686-9713. [PMID: 32407290 PMCID: PMC7288922 DOI: 10.18632/aging.103237] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2019] [Accepted: 03/31/2020] [Indexed: 12/14/2022]
Abstract
Aging is associated with reduced tissue remodeling efficiency and increased fibrosis, characterized by excess collagen accumulation and altered matrix degradation. Ovulation, the process by which an egg is released from the ovary, is one of the most dynamic cycles of tissue wounding and repair. Because the ovary is one of the first organs to age, ovulation and ovarian wound healing is impaired with advanced reproductive age. To test this hypothesis, we induced superovulation in reproductively young and old mice and determined the numbers of eggs ovulated and corpora lutea (CLs), the progesterone producing glands formed post-ovulation. Reproductively old mice ovulated fewer eggs and had fewer CLs relative to young controls. Moreover, reproductively old mice exhibited a greater number of oocytes trapped within CLs and expanded cumulus oocyte complexes within unruptured antral follicles, indicative of failed ovulation. In addition, post-ovulatory tissue remodeling was compromised with age as evidenced by reduced CL vasculature, increased collagen, decreased hyaluronan, decreased cell proliferation and apoptosis, impaired wound healing capacity, and aberrant morphology of the ovarian surface epithelium (OSE). These findings demonstrate that ovulatory dysfunction is an additional mechanism underlying the age-related loss of fertility beyond the reduction of egg quantity and quality.
Collapse
Affiliation(s)
- Jamie N. Mara
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Luhan T. Zhou
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Megan Larmore
- Department of Comparative Medicine, University of Washington, Seattle, WA 98195, USA
| | - Brian Johnson
- Department of Comparative Medicine, University of Washington, Seattle, WA 98195, USA
| | - Rebecca Ayiku
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Farners Amargant
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| | - Michele T. Pritchard
- Department of Pharmacology, Toxicology and Therapeutics, University of Kansas Medical Center, Kansas City, KS 66160, USA
| | - Francesca E. Duncan
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, Chicago, IL 60611, USA
| |
Collapse
|
3
|
Lerner A, Owens LA, Coates M, Simpson C, Poole G, Velupillai J, Liyanage M, Christopoulos G, Lavery S, Hardy K, Franks S. Expression of genes controlling steroid metabolism and action in granulosa-lutein cells of women with polycystic ovaries. Mol Cell Endocrinol 2019; 486:47-54. [PMID: 30802529 DOI: 10.1016/j.mce.2019.02.015] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Revised: 01/15/2019] [Accepted: 02/18/2019] [Indexed: 01/22/2023]
Abstract
INTRODUCTION Aberrant function of granulosa cells has been implicated in the pathophysiology of PCOS. MATERIALS & METHODS Granulosa lutein (GL) cells were collected during oocyte retrieval for IVF/ICSI. RT-qPCR was used to compare gene expression between 12 control women, 12 with ovulatory PCO and 12 with anovulatory PCOS. To examine which genes are directly regulated by androgens, GL cells from an additional 12 control women were treated in-vitro with 10 nM dihydrotestosterone (DHT). RESULTS GL cells from women with PCOS showed reduced expression of CYP11A1 3-fold (p = 0.005), HSD17B1 1.8-fold (p = 0.02) and increased expression of SULT1E1 7-fold (p = 0.0003). Similar results were seen in ovulatory women with PCO. GL cells treated with 10 nM DHT showed a 4-fold (p = 0.03) increase in expression of SULT1E1 and a 5-fold reduction in SRD5A1 (p = 0.03). CONCLUSIONS These findings support the notion that aberrant regulation of steroid metabolism or action play a part in ovarian dysfunction in PCOS.
Collapse
Affiliation(s)
- A Lerner
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - L A Owens
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK.
| | - M Coates
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - C Simpson
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - G Poole
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - J Velupillai
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - M Liyanage
- Wolfson Fertility Centre, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - G Christopoulos
- Wolfson Fertility Centre, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - S Lavery
- Wolfson Fertility Centre, Hammersmith Hospital, Imperial College Healthcare NHS Trust, London, UK
| | - K Hardy
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| | - S Franks
- Institute of Reproductive and Developmental Biology, Imperial College London, Hammersmith Hospital, London, UK
| |
Collapse
|
4
|
Khristi V, Chakravarthi VP, Singh P, Ghosh S, Pramanik A, Ratri A, Borosha S, Roby KF, Wolfe MW, Rumi MAK. ESR2 regulates granulosa cell genes essential for follicle maturation and ovulation. Mol Cell Endocrinol 2018; 474:214-226. [PMID: 29580824 DOI: 10.1016/j.mce.2018.03.012] [Citation(s) in RCA: 57] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 03/09/2018] [Accepted: 03/22/2018] [Indexed: 12/31/2022]
Abstract
Estrogen receptor 2 (ESR2) plays a critical role in folliculogenesis and ovulation. Disruption of ESR2-function in the rats results in female infertility due to failure of ovulation. Ovulation failure occurred in two distinct rat models, a null mutant and a DNA binding domain (DBD) mutant of ESR2, indicating that transcriptional regulation by ESR2 is indispensable for ovulation. To define the regulatory role of ESR2 in preovulatory follicular maturation and ovulation, we investigated ovarian responsiveness to exogenous gonadotropins in prepubertal females. Granulosa cells (GCs) play a vital role in follicle maturation and ovulation, and ESR2-dependent estrogen signaling is predominant in GCs, therefore, we examined the differential expression of gonadotropin-induced genes in GCs. Of 32,623 genes detected by RNA-sequencing, 1696 were differentially expressed in Esr2-mutant rats (789 downregulated, and 907 upregulated, absolute fold change 2, FDR p < 0.05). Molecular pathway analyses indicated that these differentially expressed genes are involved in steroidogenesis, follicle maturation, and ovulation. Many of these genes are known regulators of ovarian function and a subset were also disrupted in Esr2-mutant mice. Interestingly, Kiss1 was identified as one of the differentially expressed genes implicating a potential role within the follicle and its regulation by ESR2. Our findings indicate that ESR2 regulates key genes in GCs that are essential for follicle maturation and ovulation in the rat.
Collapse
Affiliation(s)
- Vincentaben Khristi
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - V Praveen Chakravarthi
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Prabhakar Singh
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Subhra Ghosh
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Archit Pramanik
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Anamika Ratri
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Shaon Borosha
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Katherine F Roby
- Department of Anatomy and Cell Biology, University of Kansas Medical Center, Kansas City, KS 66160, United States; Institute for Reproductive Health and Regenerative Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - Michael W Wolfe
- Department of Molecular and Integrative Physiology, University of Kansas Medical Center, Kansas City, KS 66160, United States; Institute for Reproductive Health and Regenerative Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States
| | - M A Karim Rumi
- Department of Pathology and Laboratory Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States; Institute for Reproductive Health and Regenerative Medicine, University of Kansas Medical Center, Kansas City, KS 66160, United States.
| |
Collapse
|
5
|
Blaschka C, Schuler G, Sánchez-Guijo A, Zimmer B, Feller S, Kotarski F, Wudy SA, Wrenzycki C. Occurrence of sulfonated steroids and ovarian expression of steroid sulfatase and SULT1E1 in cyclic cows. J Steroid Biochem Mol Biol 2018; 179:79-87. [PMID: 29262378 DOI: 10.1016/j.jsbmb.2017.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/10/2017] [Revised: 12/07/2017] [Accepted: 12/14/2017] [Indexed: 12/28/2022]
Abstract
Historically sulfonated steroids were primarily considered as inactive metabolites destined for elimination. However, more recently they have been increasingly recognized as precursors for the production of bioactive steroids in target tissues and as functional molecules without preceding hydrolysis. In order to comprehensively characterize their occurrence in cyclic cows and their formation and hydrolysis in bovine ovarian steroidogenesis, ovaries from cyclic cows were screened for the expression of oestrogen sulfotransferase (SULTE1) and steroid sulfatase (STS) by Western blot and immunohistochemistry. Moreover, a broad spectrum of 13 sulfonated steroids was measured applying liquid chromatography-tandem mass spectrometry (LC-MS/MS) in blood samples collected from three cycling heifers during defined stages of the ovarian cycle and in fluid obtained from ovarian follicles of different size. SULT1E1 was undetectable in ovarian tissues. For STS only a weak immunostaining was found predominantly in granulosa cells of larger follicles. However, no specific band occurred in Western blot. In blood, concentrations of all sulfonated steroids investigated were below the limit of quantification (LOQ). In follicular fluid, only cholesterol sulfate was measured in considerable concentrations (328.3 ± 63.8 ng/ml). However, the role of cholesterol sulfate in bovine follicular steroidogenesis remains unclear as concentrations were obviously unrelated to follicular size. The remaining sulfonated steroids investigated were undetectable or only slightly exceeded LOQ in a minor proportion of samples. The results are clearly contrary to a role of sulfonated steroids as important precursors, intermediates or products of bovine ovarian steroidogenesis.
Collapse
Affiliation(s)
- Carina Blaschka
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany
| | - Gerhard Schuler
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany
| | - Alberto Sánchez-Guijo
- Steroid Research and Mass Spectrometry Unit, Center of Child and Adolescent Medicine, Faculty of Medicine, Justus-Liebig-University Giessen, Feulgenstrasse 10-12, D-35392 Giessen, Germany
| | - Bettina Zimmer
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany
| | - Sabine Feller
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany
| | - Franziska Kotarski
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany
| | - Stefan A Wudy
- Steroid Research and Mass Spectrometry Unit, Center of Child and Adolescent Medicine, Faculty of Medicine, Justus-Liebig-University Giessen, Feulgenstrasse 10-12, D-35392 Giessen, Germany
| | - Christine Wrenzycki
- Clinic for Veterinary Obstetrics, Gynaecology and Andrology, Department of Molecular Reproductive Medicine, Faculty of Veterinary Medicine, Justus-Liebig-University Giessen, Frankfurter Strasse 106, D-35392 Giessen, Germany.
| |
Collapse
|
6
|
Shepel EA, Voznesenskaya ТY, Blashkiv TV, Yanchii RI. CUMULUS CELL GENES AS POTENTIAL BIOMARKERS OF OOCYTE AND EMBRYO DEVELOPMENTAL COMPETENCE. ACTA ACUST UNITED AC 2018. [PMID: 29537212 DOI: 10.15407/fz62.01.107] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Bogomoletz Institute of Physiology NASU, Ukraine, Kiev. The selection of embryos with high implantation potential is the most important task in assisted reproductive technology. Today, this selection is based on subjective morphological criteria such as growth rate, early cleavage, the degree of fragmentation, blastocyst formation. However, the morphological assessment alone does not accurately predict oocyte/early stage embryo competence. Thus, the development of an objective, accurate, fast and affordable tests to determine oocyte quality and embryo viability could increase the chance of a successful pregnancy and reduce the number of embryos to transfer. The advent of new technologies, the so-called OMIKS, has allowed to identify novel biomarkers that can be used in cycle of in vitro fertilization (IVF) for oocyte and / or embryo selection. During folliculogenesis oocyte plays a dominant role in regulation of cumulus (CC) and granulosa cell (GC) functions, and it is consequently believed that functions of GC and CC indirectly reflect oocyte’s competence. Cell functions and active cell processes are regulated through gene expression therefore, gene expression analysis in GC and/or CC could provide a non-invasive method for identification of the most competent oocytes and embryos. In cumulus cells, genes have been identified that characterize the oocyte ability to undergo meiotic maturation, successful fertilization and early embryonic development. Among them cyclooxygenase 2, gremlin 1 and hyaluronan synthase-2, which play an important roles during oocyte development, ovulation and fertilization. This article reviews the recent data regarding these genes as potential biomarkers for selection of oocytes and embryos in the IVF program.
Collapse
|
7
|
Parker VS, Squirewell EJ, Lehmler HJ, Robertson LW, Duffel MW. Hydroxylated and sulfated metabolites of commonly occurring airborne polychlorinated biphenyls inhibit human steroid sulfotransferases SULT1E1 and SULT2A1. ENVIRONMENTAL TOXICOLOGY AND PHARMACOLOGY 2018; 58:196-201. [PMID: 29408762 PMCID: PMC6078096 DOI: 10.1016/j.etap.2018.01.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 01/24/2018] [Indexed: 05/20/2023]
Abstract
Polychlorinated biphenyls (PCBs) are ubiquitous environmental contaminants that are associated with varied adverse health effects. Lower chlorinated PCBs are prevalent in indoor and outdoor air and can be metabolized to their hydroxylated derivatives (OH-PCBs) followed by sulfation to form PCB sulfates. Sulfation is also a means of signal termination for steroid hormones. The human estrogen sulfotransferase (SULT1E1) and alcohol/hydroxysteroid sulfotransferase (SULT2A1) catalyze the formation of steroid sulfates that are inactive at steroid hormone receptors. We investigated the inhibition of SULT1E1 (IC50s ranging from 7.2 nM to greater than 10 μM) and SULT2A1 (IC50s from 1.3 μM to over 100 μM) by five lower-chlorinated OH-PCBs and their corresponding PCB sulfates relevant to airborne PCB-exposure. Several congeners of lower chlorinated OH-PCBs relevant to airborne PCB exposures were potent inhibitors of SULT1E1 and SULT2A1 and thus have the potential to disrupt regulation of intracellular concentrations of the receptor-active steroid substrates for these enzymes.
Collapse
Affiliation(s)
- Victoria S Parker
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, IA, United States
| | - Edwin J Squirewell
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, IA, United States
| | - Hans-Joachim Lehmler
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, Iowa City, IA, United States
| | - Larry W Robertson
- Department of Occupational and Environmental Health, College of Public Health, The University of Iowa, Iowa City, IA, United States
| | - Michael W Duffel
- Department of Pharmaceutical Sciences and Experimental Therapeutics, College of Pharmacy, The University of Iowa, Iowa City, IA, United States.
| |
Collapse
|
8
|
Growth Hormone Releasing Peptide-2 Attenuation of Protein Kinase C-Induced Inflammation in Human Ovarian Granulosa Cells. Int J Mol Sci 2016; 17:ijms17081359. [PMID: 27548147 PMCID: PMC5000754 DOI: 10.3390/ijms17081359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2016] [Revised: 08/15/2016] [Accepted: 08/16/2016] [Indexed: 12/17/2022] Open
Abstract
Cyclooxygenase-2 (COX-2) and interleukin-8 (IL-8) are two important inflammatory mediators in ovulation. Ghrelin may modulate inflammatory signaling via growth hormone secretagogue receptors. We investigated the role of ghrelin in KGN human ovarian granulosa cells using protein kinase C (PKC) activator phorbol 12, 13-didecanoate (PDD) and synthetic ghrelin analog growth hormone releasing peptide-2 (GHRP-2). GHRP-2 attenuated PDD-induced expression of protein and mRNA, the promoter activity of COX-2 and IL-8 genes, and the secretion of prostaglandin E2 (PGE₂) and IL-8. GHRP-2 promoted the degradation of PDD-induced COX-2 and IL-8 proteins with the involvement of proteasomal and lysosomal pathways. PDD-mediated COX-2 production acts via the p38, c-Jun N-terminal kinase (JNK), extracellular signal-regulated kinase (ERK) and nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) pathways; PDD-mediated IL-8 production acts via the p38, JNK and ERK pathways. GHRP-2 reduced the PDD-induced phosphorylation of p38 and JNK and activator protein 1 (AP-1) reporter activation and PDD-induced NF-κB nuclear translocation and reporter activation. The inhibitors of mitogen-activated protein kinase phosphatase-1 (MKP-1) and protein phosphatase 2 (PP2A) reduced the inhibitory effect of GHRP-2 on PDD-induced COX-2 and IL-8 expression. Our findings demonstrate an anti-inflammatory role for ghrelin (GHRP-2) in PKC-mediated inflammation of granulosa cells, at least in part, due to its inhibitory effect on PKC-induced activation of p38, JNK and NF-κB, possibly by targeting to MKP-1 and PP2A.
Collapse
|
9
|
Pashaiasl M, Ebrahimi M, Ebrahimie E. Identification of the key regulating genes of diminished ovarian reserve (DOR) by network and gene ontology analysis. Mol Biol Rep 2016; 43:923-37. [PMID: 27324248 DOI: 10.1007/s11033-016-4025-8] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2015] [Accepted: 05/30/2016] [Indexed: 11/30/2022]
Abstract
Diminished ovarian reserve (DOR) is one of the reasons for infertility that not only affects both older and young women. Ovarian reserve assessment can be used as a new prognostic tool for infertility treatment decision making. Here, up- and down-regulated gene expression profiles of granulosa cells were analysed to generate a putative interaction map of the involved genes. In addition, gene ontology (GO) analysis was used to get insight intol the biological processes and molecular functions of involved proteins in DOR. Eleven up-regulated genes and nine down-regulated genes were identified and assessed by constructing interaction networks based on their biological processes. PTGS2, CTGF, LHCGR, CITED, SOCS2, STAR and FSTL3 were the key nodes in the up-regulated networks, while the IGF2, AMH, GREM, and FOXC1 proteins were key in the down-regulated networks. MIRN101-1, MIRN153-1 and MIRN194-1 inhibited the expression of SOCS2, while CSH1 and BMP2 positively regulated IGF1 and IGF2. Ossification, ovarian follicle development, vasculogenesis, sequence-specific DNA binding transcription factor activity, and golgi apparatus are the major differential groups between up-regulated and down-regulated genes in DOR. Meta-analysis of publicly available transcriptomic data highlighted the high coexpression of CTGF, connective tissue growth factor, with the other key regulators of DOR. CTGF is involved in organ senescence and focal adhesion pathway according to GO analysis. These findings provide a comprehensive system biology based insight into the aetiology of DOR through network and gene ontology analyses.
Collapse
Affiliation(s)
- Maryam Pashaiasl
- Women's Reproductive Health Research Centre, Tabriz University of Medical Sciences, Tabriz, Iran. .,Drug Applied Research Center, Tabriz University of Medical Sciences, Tabriz, Iran. .,Department of Anatomical Sciences, Faculty of Medicine, Tabriz University of Medical Sciences, Tabriz, Iran.
| | - Mansour Ebrahimi
- Bioinformatics Research Group and Department of Biology, Qom University, Qom, Iran
| | - Esmaeil Ebrahimie
- Division of Information Technology, Engineering and the Environment, School of Information Technology and Mathematical Sciences, University of South Australia, Adelaide, Australia.,Institute of Biotechnology, Shiraz University, Shiraz, Iran.,Department of Genetics and Evolution, School of Biological Sciences, The University of Adelaide, Adelaide, Australia.,School of Biological Sciences, Faculty of Science and Engineering, Flinders University, Adelaide, Australia
| |
Collapse
|
10
|
Wilson K, Park J, Curry TE, Mishra B, Gossen J, Taniuchi I, Jo M. Core Binding Factor-β Knockdown Alters Ovarian Gene Expression and Function in the Mouse. Mol Endocrinol 2016; 30:733-47. [PMID: 27176614 DOI: 10.1210/me.2015-1312] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Core binding factor (CBF) is a heterodimeric transcription factor complex composed of a DNA-binding subunit, one of three runt-related transcription factor (RUNX) factors, and a non-DNA binding subunit, CBFβ. CBFβ is critical for DNA binding and stability of the CBF transcription factor complex. In the ovary, the LH surge increases the expression of Runx1 and Runx2 in periovulatory follicles, implicating a role for CBFs in the periovulatory process. The present study investigated the functional significance of CBFs (RUNX1/CBFβ and RUNX2/CBFβ) in the ovary by examining the ovarian phenotype of granulosa cell-specific CBFβ knockdown mice; CBFβ f/f * Cyp19 cre. The mutant female mice exhibited significant reductions in fertility, with smaller litter sizes, decreased progesterone during gestation, and fewer cumulus oocyte complexes collected after an induced superovulation. RNA sequencing and transcriptome assembly revealed altered expression of more than 200 mRNA transcripts in the granulosa cells of Cbfb knockdown mice after human chorionic gonadotropin stimulation in vitro. Among the affected transcripts are known regulators of ovulation and luteinization including Sfrp4, Sgk1, Lhcgr, Prlr, Wnt4, and Edn2 as well as many genes not yet characterized in the ovary. Cbfβ knockdown mice also exhibited decreased expression of key genes within the corpora lutea and morphological changes in the ovarian structure, including the presence of large antral follicles well into the luteal phase. Overall, these data suggest a role for CBFs as significant regulators of gene expression, ovulatory processes, and luteal development in the ovary.
Collapse
Affiliation(s)
- Kalin Wilson
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Jiyeon Park
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Thomas E Curry
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Birendra Mishra
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Jan Gossen
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Ichiro Taniuchi
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| | - Misung Jo
- Department of Obstetrics and Gynecology (K.W., J.P., T.E.C., B.M., M.J.), Chandler Medical Center, University of Kentucky, Lexington, Kentucky 40536-0298; Women's Health Department (J.G.), Merck Sharp and Dohme Research Laboratories, 5340-BH Oss, The Netherlands; and Laboratory for Transcriptional Regulation (I.T.), Research Center for Allergy and Immunology, Yokohama, Kanagawa 230-0045, Japan
| |
Collapse
|
11
|
Felis catus ovary as a model to study follicle biology in vitro. J Assist Reprod Genet 2015; 32:1105-11. [PMID: 26089083 DOI: 10.1007/s10815-015-0511-5] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2015] [Accepted: 06/04/2015] [Indexed: 12/13/2022] Open
Abstract
PURPOSE The current study was designed to evaluate the response of individual intact antral follicles from adult female domestic cats to a luteinizing hormone (LH) stimulus in vitro by assessing cumulus-oocyte expansion (C-OE) and steroid production. METHODS C-OE and steroid levels (estradiol [E2] and progesterone [P4]) obtained from individual antral feline follicles (n = 366 follicles; n = 56 cats) were analyzed after 12 or 24 h of culture in the presence or absence of LH (low [3.4 ng/ml] or high [100 ng/ml]). RESULTS At the end of the culture, the highest percentage of expanded cumulus-oocyte complexes (COCs) was observed in the LH groups at 12 or 24 h in comparison to their controls (p < 0.001). There was a significant increase in expanded COCs when comparing LH concentrations (high vs. low) at 12 or 24 h. Higher levels of both E2 and P4 were observed in the media from antral follicles after 12 and 24 h of culture in the presence of LH (both concentration, p < 0.05). There was no association between hormone levels and follicle diameter; high variability was observed in the steroid levels produced by antral follicles within all treatment groups. CONCLUSIONS These data indicate, for the first time, that feline antral follicles (0.5-2 mm) from different stages of the natural estrous cycle can be cultured and will respond to an LH stimulus, based on an increase in steroid levels as well as C-OE after 12 or 24 h in culture.
Collapse
|
12
|
Ren X, Wu X, Hillier SG, Fegan KS, Critchley HOD, Mason JI, Sarvi S, Harlow CR. Local estrogen metabolism in epithelial ovarian cancer suggests novel targets for therapy. J Steroid Biochem Mol Biol 2015; 150:54-63. [PMID: 25817828 PMCID: PMC4429663 DOI: 10.1016/j.jsbmb.2015.03.010] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 03/09/2015] [Accepted: 03/22/2015] [Indexed: 01/25/2023]
Abstract
Epithelial ovarian cancer (EOC) accounts for about 90% of malignant ovarian tumors, and estrogen is often implicated in disease progression. We therefore compared the potential for gating of estrogen action via pre-receptor metabolism in normal human ovarian surface epithelium (OSE), EOC and selected EOC cell lines (SKOV3 and PEO1). Steroid sulphatase (STS), estrogen sulfotransferase (EST), 17β-hydroxysteroid dehydrogenases 2 (17BHSD2) and 5 (17BHSD5) mRNAs, proteins and enzymatic activities were all detectable in primary cell cultures of OSE and EOC, whereas aromatase and 17BHSD1 expression was negligible. qRT-PCR assay on total mRNA revealed significantly higher EST mRNA expression in OSE compared to EOC (P<0.05). Radioenzymatic measurements confirmed reduced sulfoconjugation (neutralization) of free estrogen in EOC relative to OSE. OSE cells were more effective at converting free [(3)H]-E1 to [(3)H]-E1S or [(3)H]-E2S, while EOC cell lines mainly converted [(3)H]-E1 to [(3)H]-E2 with minimal formation of [(3)H]-E1S or [(3)H]-E2S. IL1α treatment suppressed EST (P<0.01) and 17BHSD2 (P<0.001) mRNA levels in OSE and stimulated STS mRNA levels (P<0.001) in cancer (SKOV3) cells. These results show that estrogen is differentially metabolized in OSE and EOC cells, with E2 'activation' from conjugated estrogen predominating in EOC. Inflammatory cytokines may further augment the local production of E2 by stimulating STS and suppressing EST. We conclude that local estrogen metabolism may be a target for EOC treatment.
Collapse
Affiliation(s)
- Xia Ren
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - Xuan Wu
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - Stephen G Hillier
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - K Scott Fegan
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - Hilary O D Critchley
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - J Ian Mason
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - Sana Sarvi
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom
| | - Christopher R Harlow
- MRC Centre for Reproductive Health, The University of Edinburgh, The Queen's Medical Research Institute, 47 Little France Crescent, Edinburgh, Scotland EH16 4TJ, United Kingdom.
| |
Collapse
|
13
|
Gerrits H, Paradé MCBC, Koonen-Reemst AMCB, Bakker NEC, Timmer-Hellings L, Sollewijn Gelpke MD, Gossen JA. Reversible infertility in a liver receptor homologue-1 (LRH-1)-knockdown mouse model. Reprod Fertil Dev 2014; 26:293-306. [DOI: 10.1071/rd12131] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2012] [Accepted: 12/22/2012] [Indexed: 12/15/2022] Open
Abstract
Liver receptor homologue-1 (LRH-1) is an orphan nuclear receptor that has been implicated in steroid hormone biosynthesis and fertility. Herein we describe a transgenic inducible short hairpin (sh) RNA mouse model that was used to study the effect of transient LRH-1 knockdown in vivo. Induction of expression of the shRNA directed against LRH-1 for 2–6 weeks resulted in 80% knockdown of LRH-1 protein in the ovary and complete infertility. Gonadotropin hyperstimulation could not rescue the observed defects in ovulation and corpus luteum formation in LRH-1-knockdown mice. The infertility phenotype was fully reversible because LRH-1-knockdown females became pregnant and delivered normal size litters and healthy pups after cessation of LRH-1 shRNA expression. Timed ovarian microarray analysis showed that, in line with the observed decrease in plasma progesterone levels, key steroid biosynthesis genes, namely Star, Cyp11a1, Hsd3b and Scarb1, were downregulated in LRH-1-knockdown ovaries. In contrast with what has been described previously, no clear effect was observed on oestrogenic activity in LRH-1-knockdown mice. Only Sult1e1 and, surprisingly, Hsd17b7 expression was modulated with potentially opposite effects on oestradiol bioavailability. In conclusion, the fully reversible infertility phenotype of LRH-1-knockdown mice shows the feasibility of an LRH-1 antagonist as new contraceptive therapy with a mechanism of action that most prominently affects cholesterol availability and progesterone production.
Collapse
|
14
|
Chalmey C, Giton F, Chalmel F, Fiet J, Jégou B, Mazaud-Guittot S. Systemic compensatory response to neonatal estradiol exposure does not prevent depletion of the oocyte pool in the rat. PLoS One 2013; 8:e82175. [PMID: 24358151 PMCID: PMC3864944 DOI: 10.1371/journal.pone.0082175] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2013] [Accepted: 10/21/2013] [Indexed: 11/19/2022] Open
Abstract
The formation of ovarian follicles is a finely tuned process that takes place within a narrow time-window in rodents. Multiple factors and pathways have been proposed to contribute to the mechanisms triggering this process but the role of endocrine factors, especially estrogens, remains elusive. It is currently hypothesized that removal from the maternal hormonal environment permits follicle formation at birth. However, experimentally-induced maintenance of high 17β-estradiol (E2) levels leads to subtle, distinct, immediate effects on follicle formation and oocyte survival depending on the species and dose. In this study, we examined the immediate effects of neonatal E2 exposure from post-natal day (PND) 0 to PND2 on the whole organism and on ovarian follicle formation in rats. Measurements of plasma E2, estrone and their sulfate conjugates after E2 exposure showed that neonatal female rats rapidly acquire the capability to metabolize and clear excessive E2 levels. Concomitant modifications to the mRNA content of genes encoding selected E2 metabolism enzymes in the liver and the ovary in response to E2 exposure indicate that E2 may modify the neonatal maturation of these organs. In the liver, E2 treatment was associated with lower acquisition of the capability to metabolize E2. In the ovary, E2 depleted the oocyte pool in a dose dependent manner by PND3. In 10 µg/day E2-treated ovaries, apoptotic oocytes were observed in newly formed follicles in addition to areas of ovarian cord remodeling. At PND6, follicles without any visible oocyte were present and multi-oocyte follicles were not observed. Our study reveals a major species-difference. Indeed, neonatal exposure to E2 depletes the oocyte pool in the rat ovary, whereas in the mouse it is well known to increase oocyte survival.
Collapse
Affiliation(s)
- Clémentine Chalmey
- Institut National de la Santé et de la Recherche Médicale, Unité 1085 Institut de Recherche en Santé Environnement et Travail, Institut Fédératif de Recherche 140, Université de Rennes 1, Rennes, France
| | - Franck Giton
- AP-HP, Hôpital H. Mondor - A. Chenevier, service de Biochimie et de Génétique, Créteil, France
- Institut National de la Santé et de la Recherche Médicale, U955 Équipe 07, Créteil, France
| | - Frédéric Chalmel
- Institut National de la Santé et de la Recherche Médicale, Unité 1085 Institut de Recherche en Santé Environnement et Travail, Institut Fédératif de Recherche 140, Université de Rennes 1, Rennes, France
| | - Jean Fiet
- Institut National de la Santé et de la Recherche Médicale, U955 Équipe 07, Créteil, France
| | - Bernard Jégou
- Institut National de la Santé et de la Recherche Médicale, Unité 1085 Institut de Recherche en Santé Environnement et Travail, Institut Fédératif de Recherche 140, Université de Rennes 1, Rennes, France
- Ecole des Hautes Études en Santé Publique, Rennes, France
| | - Séverine Mazaud-Guittot
- Institut National de la Santé et de la Recherche Médicale, Unité 1085 Institut de Recherche en Santé Environnement et Travail, Institut Fédératif de Recherche 140, Université de Rennes 1, Rennes, France
- * E-mail:
| |
Collapse
|
15
|
Toda K, Hayashi Y, Yamashita A, Okabe M, Ono M, Saibara T. Aromatase-null mice expressing enhanced green fluorescent protein in germ cells provide a model system to assess estrogen-dependent ovulatory responses. Transgenic Res 2013; 23:293-302. [PMID: 24272335 DOI: 10.1007/s11248-013-9771-y] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2013] [Accepted: 11/15/2013] [Indexed: 12/24/2022]
Abstract
Enhanced green fluorescent protein (EGFP) has provided us with valuable approaches for tracking living cells. We established a novel line of transgenic mice, which express EGFP in the testis and ovary. Histological analysis demonstrated that spermatids in the testis and oocytes in ovarian follicles beyond preantral stages were positive for EGFP. By exploiting these features, we evaluated ovulatory responses of aromatase-gene (Cyp19a) knockout mouse expressing the EGFP transgene, which is totally anovulatory due to 17β-estradiol (E2) deficiency. Ovulation in the knockout mice was induced by sequential injections of E2 on days 1, 4 and 5, pregnant mare serum gonadotropin on day 4 and human chorionic gonadotropin on day 6. Fluorescent oocytes were readily detectable at 15 h after the last gonadotropin injection in the oviduct under a fluorescence stereomicroscope, even when only one oocyte was present. However, when E2 supplementation on day 4 or day 5 in the regimen was omitted, no ovulated oocytes were detected, indicating that exogenous E2 supplementation at the time of gonadotropin stimulation is necessary to induce ovulation in aromatase-gene knockout mice. Our results further demonstrated that the current mouse line can provide an alternative tool to study germ cell biology, including oogenesis, ovulation and senescence.
Collapse
Affiliation(s)
- Katsumi Toda
- Department of Biochemistry, School of Medicine, Kochi University, Nankoku, Kochi, 783-8505, Japan,
| | | | | | | | | | | |
Collapse
|
16
|
Agca C, Yakan A, Agca Y. Estrus synchronization and ovarian hyper-stimulation treatments have negligible effects on cumulus oocyte complex gene expression whereas induction of ovulation causes major expression changes. Mol Reprod Dev 2013; 80:102-17. [PMID: 23239112 DOI: 10.1002/mrd.22141] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 11/29/2012] [Indexed: 02/02/2023]
Abstract
The effects of exogenous hormones, used for estrus synchronization and ovarian hyper stimulation, on cumulus oocyte complexes (COCs) gene expression in sexually mature rats were determined using microarrays. Gene expression in COCs collected from GnRH (G(trt)), GnRH + eCG (G + E(trt)), and GnRH + eCG + hCG (G + E + H(trt)) treatments were compared to COCs from naturally cycling (NC) rats before the preovulatory luteninizing hormone surge. There was no significant difference in gene expression among NC, G(trt), and G + E(trt); however, over 2,600 genes were significantly different between NC and G + E + H(trt) (P < 0.05). Genes upregulated in G + E + H(trt) encode for: proteins that are involved in prostaglandin synthesis (Ptgs2, Pla2g4a, and Runx1) and cholesterol biosynthesis (Hmgcr, Sc4mol, and Dhcr24); receptors that allow cholesterol uptake (Ldlr and Scarb1), regulate progesterone synthesis (Star), and inactivate estrogen (Sult1e1); and downstream effectors of LH signal (Pgr, Cebpb, Creb3l1, Areg, Ereg, and Adamts1). Conversely, G + E + H(trt) downregulated genes encoding proteins involved in: DNA replication and cell cycle progression (Ccne2, Orc5l, Rad50, and Mcm6); reproductive developmental process; and granulosa cell expansion (Gdf9, Bmp15, Amh, Amhr2, Bmpr1b, Tgfb2, Foxl2, Pde3a, Esr2, Fshr, Ybx2, Ccnd2, Ccnb1ip1, and Zp3); maternal effect genes required for embryo development (Zar1, Npm2, Nlrp5, Dnmt1, H1foo, and Zfp57); amino acid degradation; and ketogenesis (Hmgcs2, and Cpt1b). These results from the rat show that hormones used for estrus synchronization (G(trt)) and ovarian hyper stimulation (G + E(trt)) had minimal effects on gene expression, whereas induction of ovulation (G + E + H(trt)) caused major changes in gene expression of rat COCs. This study provides comprehensive information about regulated genes during late follicle development and ovulation induction.
Collapse
Affiliation(s)
- Cansu Agca
- Department of Veterinary Pathobiology, College of Veterinary Medicine, University of Missouri-Columbia, Columbia, Missouri 65211, USA
| | | | | |
Collapse
|
17
|
Suzuki-Anekoji M, Suzuki A, Wu SW, Angata K, Murai KK, Sugihara K, Akama TO, Khoo KH, Nakayama J, Fukuda MN, Fukuda M. In vivo regulation of steroid hormones by the Chst10 sulfotransferase in mouse. J Biol Chem 2012; 288:5007-16. [PMID: 23269668 PMCID: PMC3576103 DOI: 10.1074/jbc.m112.433474] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Chst10 adds sulfate to glucuronic acid to form a carbohydrate antigen, HNK-1, in glycoproteins and glycolipids. To determine the role of Chst10 in vivo, we generated systemic Chst10-deficient mutant mice. Although Chst10−/− mice were born and grew to adulthood with no gross defects, they were subfertile. Uteri from Chst10−/− females at the pro-estrus stage were larger than those from wild-type females and exhibited a thick uterine endometrium. Serum estrogen levels in Chst10−/− females were higher than those from wild-type females, suggesting impaired down-regulation of estrogen. Because steroid hormones are often conjugated to glucuronic acid, we hypothesized that Chst10 sulfates glucuronidated steroid hormone to regulate steroid hormone in vivo. Enzymatic activity assays and structural analysis of Chst10 products by HPLC and mass spectrometry revealed that Chst10 indeed sulfates glucuronidated estrogen, testosterone, and other steroid hormones. We also identified an HPLC peak corresponding to sulfated and glucuronidated estradiol in serum from wild-type but not from Chst10 null female mice. Estrogen-response element reporter assays revealed that Chst10-modified estrogen likely did not bind to its receptor. These results suggest that subfertility exhibited by female mice following Chst10 loss results from dysregulation of estrogen. Given that Chst10 transfers sulfates to several steroid hormones, Chst10 likely functions in widespread regulation of steroid hormones in vivo.
Collapse
Affiliation(s)
- Misa Suzuki-Anekoji
- Glycobiology Unit, Tumor Microenvironment Program, Cancer Center, Sanford-Burnham Medical Research Institute, La Jolla, California 92037, USA
| | | | | | | | | | | | | | | | | | | | | |
Collapse
|
18
|
Liu J, Zhao M, Zhuang S, Yang Y, Yang Y, Liu W. Low concentrations of o,p'-DDT inhibit gene expression and prostaglandin synthesis by estrogen receptor-independent mechanism in rat ovarian cells. PLoS One 2012; 7:e49916. [PMID: 23209616 PMCID: PMC3507918 DOI: 10.1371/journal.pone.0049916] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Accepted: 10/15/2012] [Indexed: 01/13/2023] Open
Abstract
o,p'-DDT is an infamous xenoestrogen as well as a ubiquitous and persistent pollutant. Biomonitoring studies show that women have been internally exposed to o,p'-DDT at range of 0.3-500 ng/g (8.46×10(-10) M-1.41×10(-6) M) in blood and other tissues. However, very limited studies have investigated the biological effects and mechanism(s) of o,p'-DDT at levels equal to or lower than current exposure levels in human. In this study, using primary cultures of rat ovarian granulosa cells, we determined that very low doses of o,p'-DDT (10(-12)-10(-8) M) suppressed the expression of ovarian genes and production of prostaglandin E2 (PGE2). In vivo experiments consistently demonstrated that o,p'-DDT at 0.5-1 mg/kg inhibited the gene expression and PGE2 levels in rat ovary. The surprising results from the receptor inhibitors studies showed that these inhibitory effects were exerted independently of either classical estrogen receptors (ERs) or G protein-coupled receptor 30 (GPR30). Instead, o,p'-DDT altered gene expression or hormone action via inhibiting the activation of protein kinase A (PKA), rather than protein kinase C (PKC). We further revealed that o,p'-DDT directly interfered with the PKA catalytic subunit. Our novel findings support the hypothesis that exposure to low concentrations of o,p'-DDT alters gene expression and hormone synthesis through signaling mediators beyond receptor binding, and imply that the current exposure levels of o,p'-DDT observed in the population likely poses a health risk to female reproduction.
Collapse
Affiliation(s)
- Jing Liu
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Meirong Zhao
- Research Center of Environmental Science, College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Shulin Zhuang
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Yan Yang
- Research Center of Environmental Science, College of Biological and Environmental Engineering, Zhejiang University of Technology, Hangzhou, China
| | - Ye Yang
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
| | - Weiping Liu
- MOE Key Lab of Environmental Remediation and Ecosystem Health, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China
- * E-mail:
| |
Collapse
|
19
|
Park JI, Jeon HJ, Jung NK, Jang YJ, Kim JS, Seo YW, Jeong M, Chae HZ, Chun SY. Periovulatory expression of hydrogen peroxide-induced sulfiredoxin and peroxiredoxin 2 in the rat ovary: gonadotropin regulation and potential modification. Endocrinology 2012; 153:5512-21. [PMID: 22989627 DOI: 10.1210/en.2012-1414] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Reactive oxygen species are involved in ovulation. The aim of this study was to examine gonadotropin regulation of antioxidant enzyme sulfiredoxin (Srx) and peroxiredoxin 2 (PRDX2) expressions and modification during the ovulatory process in rats. Administration of antioxidants in vivo reduced ovulation rate and cumulus expansion. LH treatment increased H(2)O(2) levels within 15 min, which, in turn, induced Srx gene expression in cultured preovulatory follicles. Treatment of preovulatory follicles with catalase suppressed the stimulatory effect of LH on Akt phosphorylation. LH- or H(2)O(2)-stimulated Srx mRNA levels were suppressed by inhibitors of antioxidant agents and MAPK kinase. An in vivo injection of equine chorionic gonadotropin-human chorionic gonadotropin (hCG) stimulated Srx mRNA within 1 h in granulosa but not thecal cells of preovulatory follicles. Srx protein levels were stimulated from 3 h post-hCG injection. Immunofluorescence analysis revealed that oocytes expressed the Srx protein. Furthermore, hCG treatment increased Srx expression in mural granulosa, theca and cumulus cells, but the Srx protein was not detected in corpora lutea. Gene expression of PRDX2, identified as an Srx-dependent modified enzyme, was stimulated by gonadotropins. In situ hybridization analysis demonstrated that PRDX2 mRNA was detected in oocytes and theca cells as well as granulosa cells of some antral and preovulatory follicles. High levels of PRDX2 mRNA were detected in corpora lutea. Total levels of PRDX2 protein were not changed by gonadotropins. However, levels of hyperoxidized PRDX2 increased within 2-3 h after the hCG injection. Taken together, gonadotropin stimulation of Srx expression and PRDX2 modification in the ovary suggest the existence of an antioxidant system to maintain H(2)O(2) production and elimination during the periovulatory period.
Collapse
Affiliation(s)
- Jae-Il Park
- School of Biological Sciences and Technology, Chonnam National University, Gwangju, Republic of Korea
| | | | | | | | | | | | | | | | | |
Collapse
|
20
|
Toda K, Ono M, Yuhki KI, Ushikubi F, Saibara T. 17β-Estradiol is critical for the preovulatory induction of prostaglandin E(2) synthesis in mice. Mol Cell Endocrinol 2012; 362:176-82. [PMID: 22713853 DOI: 10.1016/j.mce.2012.06.006] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2012] [Revised: 06/08/2012] [Accepted: 06/12/2012] [Indexed: 10/28/2022]
Abstract
Aromatase-deficient (ArKO) mice are totally anovulatory due to insufficient estrogen production. However, sequential administrations of high doses of 17β-estradiol (E2) and gonadotropins were found to induce ovulation in these mice. Here, we examined how the ovulatory stimulation for ArKO mice alters the expressions of genes related to prostaglandin (PG) E(2) metabolism and ovarian contents of PGE(2), as PGE(2) is one of the critical mediators of ovulatory induction. The ovulatory stimulation significantly increased mRNA expressions of prostaglandin-endoperoxide synthase 2, PGE(2) receptor type 4 and sulfotransferase family 1E, member 1, in preovulatory ArKO ovaries. In contrast, it suppressed the mRNA expression of 15-hydroxyprostaglandin dehydrogenase. Furthermore, significant elevation in the PGE(2) contents was detected in the preovulatory ovaries of ArKO mice after stimulation with E2 plus ovulatory doses of gonadotropins. Thus, these analyses demonstrate a requirement of E2 for the preovulatory enhancement of PGE(2) synthesis, leading to future success in ovulation.
Collapse
Affiliation(s)
- Katsumi Toda
- Department of Biochemistry, Kochi University, School of Medicine, Nankoku, Kochi 783-8505, Japan.
| | | | | | | | | |
Collapse
|
21
|
May-Panloup P, Ferré-L'Hôtellier V, Morinière C, Marcaillou C, Lemerle S, Malinge MC, Coutolleau A, Lucas N, Reynier P, Descamps P, Guardiola P. Molecular characterization of corona radiata cells from patients with diminished ovarian reserve using microarray and microfluidic-based gene expression profiling. Hum Reprod 2012; 27:829-43. [DOI: 10.1093/humrep/der431] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
|
22
|
Zhang ZC, Xiao LH, Wang Y, Chen SY, Yang ZQ, Zhao XL, Zhu Q, Liu YP. mRNA expression profiles of calmodulin and liver receptor homolog-1 genes in chickens. GENETICS AND MOLECULAR RESEARCH 2012; 11:3482-9. [DOI: 10.4238/2012.september.26.3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
|
23
|
Yerushalmi GM, Maman E, Yung Y, Kedem A, Hourvitz A. Molecular characterization of the human ovulatory cascade-lesson from the IVF/IVM model. J Assist Reprod Genet 2011; 28:509-15. [PMID: 21667102 DOI: 10.1007/s10815-011-9594-9] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2011] [Accepted: 05/24/2011] [Indexed: 11/24/2022] Open
Abstract
AIMS Ovarian follicular development and ovulation in mammals is a complex and highly regulated process. Most advances in the understanding of the ovulatory process have come from animal models. However, translational research in humans is of crucial importance for improving fertility treatment and control. METHODS IVM/IVF procedures allow us to obtain follicular fluid and granulosa cells (GC) from follicles in different developmental stages with and without hCG priming. RESULTS Using the cells and fluids obtained in IVM/IVF procedures allowed us to characterize human ovulatory gene expression during antral folliculogenesis and ovulation, examine gene expression in luteinized and non-luteinized GC in vivo and in vitro and to use cumulus GC genes as biomarkers for oocyte and embryo maturity and competence. CONCLUSION Biological material obtained during IVM/IVF procedures is an important tool to study the human ovulatory cascade and can serve to improve IVM techniques and fertility treatment and control.
Collapse
Affiliation(s)
- Gil M Yerushalmi
- IVF Unit, Department of Obstetrics and Gynecology, Chaim Sheba Medical Centre, Tel-Hashomer, Affiliated to the Sackler School of Medicine, Tel-Aviv University, Tel-Aviv, Israel.
| | | | | | | | | |
Collapse
|
24
|
Khatri P, Frenette G, Sullivan R, Hoffmann B, Schuler G. Expression of SULT1E1 protein in bovine placentomes: Evidence for localization in uninucleated trophoblast cells. Placenta 2011; 32:431-40. [DOI: 10.1016/j.placenta.2011.03.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2010] [Revised: 03/04/2011] [Accepted: 03/07/2011] [Indexed: 11/16/2022]
|
25
|
Tsubota K, Kanki M, Noto T, Shiraki K, Takeuchi A, Nakatsuji S, Seki J, Oishi Y, Matsumoto M, Nakayama H. Transitional gene expression profiling in ovarian follicle during ovulation in normal-cycle rats. Toxicol Pathol 2011; 39:641-52. [PMID: 21551027 DOI: 10.1177/0192623311406932] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Evaluation of ovarian toxicity requires an understanding of the physiological changes related to the estrous cycle in the ovary. The authors investigated the transitional gene expression profile of ovulatory follicles in rats that show normal estrous cyclicity. Ovaries were collected at 10:00 and 22:00 on the proestrus day and at 10:00 on the estrus day. Ovarian follicles or early corpora lutea were isolated using laser microdissection, and extracted total RNA was analyzed using microarray technology. Clustering analysis revealed four different expression patterns: transient up- or down-regulation only at 22:00 on the proestrus day (pattern 1), up- or down-regulation only at 10:00 on the estrus day (pattern 2), continuous increase at 22:00 on the proestrus day and at 10:00 on the estrus day (pattern 3), and up- or down-regulation at 22:00 on the proestrus day and level maintenance at 10:00 on the estrus day (pattern 4). In addition, these probe sets were functionally categorized in each pattern using the Ingenuity Pathways Analysis database. These data will aid in understanding the physiology of ovulation and may be useful in assessing ovarian toxicity and its mechanism, such as in investigations of chemical-induced ovulatory impairment.
Collapse
Affiliation(s)
- Kenjiro Tsubota
- Toxicologic Pathology, Drug Safety Research Laboratories, Astellas Pharma Inc., Osaka, Japan.
| | | | | | | | | | | | | | | | | | | |
Collapse
|
26
|
Liu J, Yang Y, Yang Y, Zhang Y, Liu W. Disrupting effects of bifenthrin on ovulatory gene expression and prostaglandin synthesis in rat ovarian granulosa cells. Toxicology 2011; 282:47-55. [DOI: 10.1016/j.tox.2011.01.007] [Citation(s) in RCA: 55] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 01/04/2011] [Accepted: 01/10/2011] [Indexed: 12/13/2022]
|
27
|
Hwang K, Yatsenko AN, Jorgez CJ, Mukherjee S, Nalam RL, Matzuk MM, Lamb DJ. Mendelian genetics of male infertility. Ann N Y Acad Sci 2010; 1214:E1-E17. [PMID: 21382200 PMCID: PMC3654696 DOI: 10.1111/j.1749-6632.2010.05917.x] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Infertility is defined as the inability of a couple to conceive despite trying for a year, and it affects approximately 15% of the reproductive-age population. It is considered a genetically lethal factor, as the family lineage stops at that individual with no progeny produced. A genetic defect associated with an infertile individual cannot be transmitted to the offspring, ensuring the maintenance of reproductive fitness of the species. However, with the advent of assisted reproductive techniques (ART), we are now able to overcome sterility and bypass nature's protective mechanisms that developed through evolution to prevent fertilization by defective or deficient sperm.
Collapse
Affiliation(s)
- Kathleen Hwang
- Scott Department of Urology, Baylor College of Medicine, Houston, TX, USA
| | | | | | | | | | | | | |
Collapse
|
28
|
Rodriguez KF, Couse JF, Jayes FL, Hamilton KJ, Burns KA, Taniguchi F, Korach KS. Insufficient luteinizing hormone-induced intracellular signaling disrupts ovulation in preovulatory follicles lacking estrogen receptor-{beta}. Endocrinology 2010; 151:2826-34. [PMID: 20378682 PMCID: PMC2875826 DOI: 10.1210/en.2009-1446] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
Gonadotropin-stimulated estrogen receptor-beta (ERbeta)-null preovulatory follicles exhibit submaximal estradiol production, insufficient acquisition of LH receptor, and attenuated expression of essential ovulatory genes. These observations lead to low ovulatory rates compared with wild-type (WT) follicles. We hypothesize that insufficient LH receptor results in reduced cAMP production after an ovulatory stimulus. Individual preantral follicles were cultured with FSH for 4 d and then induced to ovulate with a single dose of human chorionic gonadotropin (hCG). cAMP levels 1 h after hCG were 50% lower in ERbeta-null than WT follicles. To determine whether the lack of LH receptor, and resulting lack of cAMP, could be bypassed by direct activation of adenylyl cyclase, WT and ERbeta-null follicles were induced to ovulate with forskolin. Ten micromolar forskolin doubled the ovulatory rate of ERbeta-null follicles compared with treatment with hCG ( approximately 50 vs. 25%, respectively). In WT follicles, 10 microm forskolin reduced the ovulation rate compared with hCG (14 vs. 83%, respectively), indicating that high doses of forskolin inhibited WT ovulation. A 10 microm concentration of forskolin induced cAMP levels in ERbeta-null follicles that were comparable to levels produced in WT follicles after hCG and either partially or completely rescued the attenuated expression of LH-responsive genes. These data indicate that direct activation of adenylyl cyclase, resulting in increased production of cAMP, partially rescues the ovulatory response of ERbeta-null follicles, suggesting that insufficient LH receptor and low cAMP levels contribute to their poor ovulatory rates. We also determined that ERbeta-null ovaries exhibit an alteration in the activation of ERK1/2. Our evaluation of the ERbeta-null ovarian phenotype indicates that ERbeta plays a role in facilitating folliculogenesis. We show that expression of ERbeta in preovulatory follicles is required for adequate cAMP production and propose that an optimal level of cAMP is required for hCG-stimulated ovulation.
Collapse
Affiliation(s)
- Karina F Rodriguez
- Director, Environmental Disease Medicine Program, Chief, Laboratory of Reproductive and Developmental Toxicology, National Institute of Environmental Health Sciences, National Institutes of Health, 111 Alexander Drive, Research Triangle Park, North Carolina 27709, USA.
| | | | | | | | | | | | | |
Collapse
|
29
|
Hawkins SM, Matzuk MM. Oocyte-somatic cell communication and microRNA function in the ovary. ANNALES D'ENDOCRINOLOGIE 2010; 71:144-8. [PMID: 20362967 DOI: 10.1016/j.ando.2010.02.020] [Citation(s) in RCA: 26] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2010] [Revised: 02/08/2010] [Accepted: 02/09/2010] [Indexed: 12/18/2022]
Abstract
An enormous amount of knowledge about the ovary has been generated over the last two decades, due in part to the development of strategies to genetically manipulate the mouse using embryonic stem cell technology. Our group and others have identified multiple factors that are important and essential at all stages of ovarian folliculogenesis from formation of the primordial factor to ovulation. It is obvious that an oocyte, the key cargo of the ovary, and the surrounding granulosa cells, the support cells of the follicle, entertain a dialog that is key for granulosa growth and differentiation and oocyte growth, maturation, and fertilization. In addition to the involvement of genes in these processes, small non-coding RNAs including microRNAs and siRNAs have been implicated as key regulators, especially in the oocyte. These studies have direct implications for human fertility control in the assisted reproductive technology (ART) laboratory.
Collapse
Affiliation(s)
- S M Hawkins
- Department of Obstetrics and Gynecology, Baylor College of Medicine, One Baylor Plaza, Houston, TX 77030, United States.
| | | |
Collapse
|
30
|
Abstract
The classical view of ovarian follicle development is that it is regulated by the hypothalamic-pituitary-ovarian axis, in which gonadotropin-releasing hormone (GnRH) controls the release of the gonadotropic hormones follicle-stimulating hormone (FSH) and luteinizing hormone (LH), and that ovarian steroids exert both negative and positive regulatory effects on GnRH secretion. More recent studies in mice and humans indicate that many other intra-ovarian signaling cascades affect follicular development and gonadotropin action in a stage- and context-specific manner. As we discuss here, mutant mouse models and clinical evidence indicate that some of the most powerful intra-ovarian regulators of follicular development include the TGF-beta/SMAD, WNT/FZD/beta-catenin, and RAS/ERK1/2 signaling pathways and the FOXO/FOXL2 transcription factors.
Collapse
Affiliation(s)
- JoAnne S. Richards
- Department of Molecular and Cellular Biology and
Department of Pathology, Baylor College of Medicine, Houston, Texas
| | - Stephanie A. Pangas
- Department of Molecular and Cellular Biology and
Department of Pathology, Baylor College of Medicine, Houston, Texas
| |
Collapse
|
31
|
Abstract
Infertility adversely affects many couples worldwide. Conversely, the exponential increase in world population threatens our planet and its resources. Therefore, a greater understanding of the fundamental cellular and molecular events that control the size of the primordial follicle pool and follicular development is of utmost importance to develop improved in vitro fertilization as well as to design novel approaches to regulate fertility. In this review we attempt to highlight some new advances in basic research of the mammalian ovary that have occurred in recent years focusing primarily on mouse models that have contributed to our understanding of ovarian follicle formation, development, and ovulation. We hope that these new insights into ovarian function will trigger more research and translation to clinically relevant problems.
Collapse
|
32
|
Abstract
Two major functions of the mammalian ovary are the production of germ cells (oocytes), which allow continuation of the species, and the generation of bioactive molecules, primarily steroids (mainly estrogens and progestins) and peptide growth factors, which are critical for ovarian function, regulation of the hypothalamic-pituitary-ovarian axis, and development of secondary sex characteristics. The female germline is created during embryogenesis when the precursors of primordial germ cells differentiate from somatic lineages of the embryo and take a unique route to reach the urogenital ridge. This undifferentiated gonad will differentiate along a female pathway, and the newly formed oocytes will proliferate and subsequently enter meiosis. At this point, the oocyte has two alternative fates: die, a common destiny of millions of oocytes, or be fertilized, a fate of at most approximately 100 oocytes, depending on the species. At every step from germline development and ovary formation to oogenesis and ovarian development and differentiation, there are coordinated interactions of hundreds of proteins and small RNAs. These studies have helped reproductive biologists to understand not only the normal functioning of the ovary but also the pathophysiology and genetics of diseases such as infertility and ovarian cancer. Over the last two decades, parallel progress has been made in the assisted reproductive technology clinic including better hormonal preparations, prenatal genetic testing, and optimal oocyte and embryo analysis and cryopreservation. Clearly, we have learned much about the mammalian ovary and manipulating its most important cargo, the oocyte, since the birth of Louise Brown over 30 yr ago.
Collapse
Affiliation(s)
- Mark A Edson
- Department of Pathology, Baylor College of Medicine, One Baylor Plaza, Houston, Texas 77030, USA
| | | | | |
Collapse
|
33
|
Sriraman V, Sinha M, Richards JS. Progesterone receptor-induced gene expression in primary mouse granulosa cell cultures. Biol Reprod 2009; 82:402-12. [PMID: 19726735 DOI: 10.1095/biolreprod.109.077610] [Citation(s) in RCA: 41] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
The progesterone receptor (PGR) is induced by luteinizing hormone (LH) in granulosa cells of preovulatory follicles, and the PGR-A isoform is essential for ovulation based on the phenotypes of Pgr isoform-specific knockout mice. Although several genes regulated by PGR-A in vivo have been identified, whether these genes are primary targets of PGR-A or if their expression also depends on other signaling molecules that are induced by the LH surge has not been resolved. Therefore, to identify genes that are either induced or repressed by PGR in the absence of LH-mediated signaling cascades, we infected primary cultures of mouse granulosa cells with either PGR-A or PGR-B adenoviral vectors without or with R-5020 as a PGR ligand. Total RNA was extracted from infected cells at 16 h and analyzed by Affymetrix Mouse 430 2.0 microarrays. PGR-A in the presence or absence of ligand significantly induced approximately 50 genes 2-fold or more (local pooled error test at P <or= 0.01). Fewer and different genes were induced by PGR-B in the absence of ligand. Edn1, Apoa1, and Cited1 were primarily regulated by PGR-A as verified by additional RT-PCR analyses, suppression by the PGR antagonist RU486, and the lack of induction by protein kinase A, protein kinase C, or epidermal growth factor (EGF)-like factors pathways. PGR regulation of these genes was confirmed further by gene expression analyses in hormonally primed Pgr mutant mouse ovaries. Because Edn1, Apoa1, and Cited1 are known to regulate angiogenesis, PGR may affect the neovascularization of follicles that is initiated with ovulation.
Collapse
|
34
|
Fan HY, Liu Z, Shimada M, Sterneck E, Johnson PF, Hedrick SM, Richards JS. MAPK3/1 (ERK1/2) in ovarian granulosa cells are essential for female fertility. Science 2009; 324:938-41. [PMID: 19443782 DOI: 10.1126/science.1171396] [Citation(s) in RCA: 466] [Impact Index Per Article: 31.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
Abstract
A surge of luteinizing hormone (LH) from the pituitary gland triggers ovulation, oocyte maturation, and luteinization for successful reproduction in mammals. Because the signaling molecules RAS and ERK1/2 (extracellular signal-regulated kinases 1 and 2) are activated by an LH surge in granulosa cells of preovulatory follicles, we disrupted Erk1/2 in mouse granulosa cells and provide in vivo evidence that these kinases are necessary for LH-induced oocyte resumption of meiosis, ovulation, and luteinization. In addition, biochemical analyses and selected disruption of the Cebpb gene in granulosa cells demonstrate that C/EBPbeta (CCAAT/Enhancer-binding protein-beta) is a critical downstream mediator of ERK1/2 activation. Thus, ERK1/2 and C/EBPbeta constitute an in vivo LH-regulated signaling pathway that controls ovulation- and luteinization-related events.
Collapse
Affiliation(s)
- Heng-Yu Fan
- Department of Molecular and Cellular Biology, Baylor College of Medicine, 1 Baylor Plaza, Houston, TX 77030, USA
| | | | | | | | | | | | | |
Collapse
|
35
|
Duggavathi R, Volle DH, Mataki C, Antal MC, Messaddeq N, Auwerx J, Murphy BD, Schoonjans K. Liver receptor homolog 1 is essential for ovulation. Genes Dev 2008; 22:1871-6. [PMID: 18628394 DOI: 10.1101/gad.472008] [Citation(s) in RCA: 158] [Impact Index Per Article: 9.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Female fertility requires normal ovarian follicular growth and ovulation. The nuclear receptor liver receptor homolog 1 has been implicated in processes as diverse as bile acid metabolism, steroidogenesis, and cell proliferation. In the ovary, Lrh1 is expressed exclusively in granulosa and luteal cells. Using somatic targeted mutagenesis, we show that mice lacking Lrh1 in granulosa cells are sterile, due to anovulation. The preovulatory stimulus fails to elicit cumulus expansion, luteinization, and follicular rupture in these mice. Multiple defects, including severely reduced transactivation of the Lrh1 target gene, nitric oxide synthase 3, leads to increased intrafollicular estradiol levels in the absence of Lrh1. This further causes dysfunction of prostaglandin and hyaluronic acid cascades and interrupts cumulus expansion. Lack of Lrh1 also interferes with progesterone synthesis because of failure of normal expression of the Lrh1 targets, steroidogenic acute regulatory protein and cytochrome P450 side-chain cleavage. In addition, expression of extracellular matrix proteases essential for ovulation is compromised. These results demonstrate that Lrh1 is a regulator of multiple mechanisms essential for maturation of ovarian follicles and for ovulation. Lrh1 is therefore a key modulator of female fertility and a potential target for contraception.
Collapse
Affiliation(s)
- Rajesha Duggavathi
- Institut de Génétique et de Biologie Moléculaire et Cellulaire, CNRS/INSERM/ULP, 67404 Illkirch, France
| | | | | | | | | | | | | | | |
Collapse
|
36
|
Shkolnik K, Ben-Dor S, Galiani D, Hourvitz A, Dekel N. Molecular characterization and bioinformatics analysis of Ncoa7B, a novel ovulation-associated and reproduction system-specific Ncoa7 isoform. Reproduction 2008; 135:321-33. [PMID: 18299425 DOI: 10.1530/rep-07-0402] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
In the present work, we employed bioinformatics search tools to select ovulation-associated cDNA clones with a preference for those representing putative novel genes. Detailed characterization of one of these transcripts, 6C3, by real-time PCR and RACE analyses led to identification of a novel ovulation-associated gene, designated Ncoa7B. This gene was found to exhibit a significant homology to the Ncoa7 gene that encodes a conserved tissue-specific nuclear receptor coactivator. Unlike Ncoa7, Ncoa7B possesses a unique and highly conserved exon at the 5' end and encodes a protein with a unique N-terminal sequence. Extensive bioinformatics analysis has revealed that Ncoa7B has one identifiable domain, TLDc, which has recently been suggested to be involved in protection from oxidative DNA damage. An alignment of TLDc domain containing proteins was performed, and the closest relative identified was OXR1, which also has a corresponding, highly related short isoform, with just a TLDc domain. Moreover, Ncoa7B expression, as seen to date, seems to be restricted to mammals, while other TLDc family members have no such restriction. Multiple tissue analysis revealed that unlike Ncoa7, which was abundant in a variety of tissues with the highest expression in the brain, Ncoa7B mRNA expression is restricted to the reproductive system organs, particularly the uterus and the ovary. The ovarian expression of Ncoa7B was stimulated by human chorionic gonadotropin. Additionally, using real-time PCR, we demonstrated the involvement of multiple signaling pathways for Ncoa7B expression on preovulatory follicles.
Collapse
Affiliation(s)
- Ketty Shkolnik
- Department of, Biological Regulation, Weizmann Institute of Science, PO Box 26, Rehovot 76100, Israel
| | | | | | | | | |
Collapse
|