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Cookingham LM, Van Voorhis BJ, Ascoli M. Do alterations in follicular fluid proteases contribute to human infertility? J Assist Reprod Genet 2015; 32:737-45. [PMID: 25682117 DOI: 10.1007/s10815-015-0447-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2014] [Accepted: 01/29/2015] [Indexed: 11/26/2022] Open
Abstract
PURPOSE Cathepsin L and ADAMTS-1 are known to play critical roles in follicular rupture, ovulation, and fertility in mice. Similar studies in humans are limited; however, both are known to increase during the periovulatory period. No studies have examined either protease in the follicular fluid of women with unexplained infertility or infertility related to advanced maternal age (AMA). We sought to determine if alterations in cathepsin L and/or ADAMTS-1 existed in these infertile populations. METHODS Patients undergoing in vitro fertilization (IVF) for unexplained infertility or AMA-related infertility were prospectively recruited for the study; patients with tubal or male factor infertility were recruited as controls. Follicular fluid was collected to determine gene expression (via quantitative polymerase chain reaction), enzyme concentrations (via enzyme-linked immunosorbent assays), and enzymatic activities (via fluorogenic enzyme cleavage assay or Western blot analysis) of cathepsin L and ADAMTS-1. RESULTS The analysis included a total of 42 patients (14 per group). We found no statistically significant difference in gene expression, enzyme concentration, or enzymatic activity of cathepsin L or ADAMTS-1 in unexplained infertility or AMA-related infertility as compared to controls. We also found no statistically significant difference in expression or concentration with advancing age. CONCLUSIONS Cathepsin L and ADAMTS-1 are not altered in women with unexplained infertility or AMA-related infertility undergoing IVF, and they do not decline with advancing age. It is possible that differences exist in natural cycles, contributing to infertility; however, our findings do not support a role for protease alterations as a common cause of infertility.
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Affiliation(s)
- Lisa Marii Cookingham
- Department of Obstetrics & Gynecology, Division of Reproductive Endocrinology & Infertility, University of Iowa College of Medicine, 200 Hawkins Drive, Iowa City, IA, 52242, USA,
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Zhao Y, Zhang C, Huang Y, Yu Y, Li R, Li M, Liu N, Liu P, Qiao J. Up-regulated expression of WNT5a increases inflammation and oxidative stress via PI3K/AKT/NF-κB signaling in the granulosa cells of PCOS patients. J Clin Endocrinol Metab 2015; 100:201-11. [PMID: 25303486 DOI: 10.1210/jc.2014-2419] [Citation(s) in RCA: 110] [Impact Index Per Article: 12.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
CONTEXT Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder accompanied by chronic low-grade inflammation, but the molecular mechanism remains unclear. OBJECTIVE We investigated the action of WNT5a in the development of chronic inflammation in PCOS and the related molecular signaling pathways. DESIGN AND SETTING This was a prospective study conducted at the Division of Reproduction Center, Peking University Third Hospital. PATIENTS A total of 35 PCOS patients and 87 control women who reported to the clinic for the in vitro procedure and the cause of marital infertility was male azoospermia were included. MAIN OUTCOME MEASURES Mural granulosa cells (GCs) of 35 PCOS patients and 37 controls were collected during oocyte retrieval and gene expression was analyzed. The human KGN cells and mural GCs from 50 control subjects (six to eight samples were pooled together for each experiment) were cultured in vitro. The regulation of inflammation and oxidative stress was confirmed by quantitative PCR, flow-cytometric assay, and dual-luciferase reporter assay after inflammatory stimuli or WNT5a overexpression. Relevant signaling pathways were identified using specific inhibitors. RESULTS Our data demonstrate significantly elevated WNT5a expression in the mural GCs of PCOS patients compared with the controls. Lipopolysaccharide stimulation increased WNT5a expression in KGN cells and mural GCs, and BAY-117082 and pyrrolidinedithiocarbamic acid [nuclear factor-κB (NF-κB) inhibitor] treatments suppressed WNT5a mRNA below the control level. WNT5a overexpression also enhanced the expression of inflammation-related genes and increased intracellular reactive oxygen species, whereas both BAY-117082 and LY-294002 (phosphatidylinositol 3-kinase inhibitor) significantly inhibited WNT5a-induced inflammation and oxidative stress. CONCLUSIONS WNT5a acts as a proinflammatory factor in human ovarian GCs. The up-regulated expression of WNT5a in PCOS increases inflammation and oxidative stress predominantly via the phosphatidylinositol 3-kinase/AKT/NF-κB signaling pathway. The proinflammatory cytokines induced might further enhance WNT5a expression via NF-κB-dependent regulation, indicating a novel regulatory system for chronic inflammation in PCOS.
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Affiliation(s)
- Yue Zhao
- Reproductive Medical Center (Y.Z., C.Z., Y.H., Y.Y., R.L., M.L., N.L., P.L., J.Q.), Department of Obstetrics and Gynecology, Peking University Third Hospital, and Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology (Y.Z., Y.H., M.L., P.L., J.Q.), Beijing, China 100191; and Key Laboratory of Assisted Reproduction (Y.Z., C.Z., Y.Y., R.L., N.L., J.Q.), Ministry of Education, Beijing, China 100191
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Kocbek V, Hevir-Kene N, Bersinger NA, Mueller MD, Rižner TL. Increased levels of biglycan in endometriomas and peritoneal fluid samples from ovarian endometriosis patients. Gynecol Endocrinol 2014; 30:520-4. [PMID: 24641675 DOI: 10.3109/09513590.2014.898055] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In our previous low-density-array gene-expression analysis we found an increased expression of biglycan gene in ovarian endometriosis patients. In the present study we evaluated biglycan expression at the protein level in tissue, serum and peritoneal fluid (PF) from ovarian endometriosis patients, patients with benign ovarian cysts and healthy women. Twenty samples of endometriomas and 27 of control tissues (benign ovarian cysts and eutopic endometrium of healthy women) were obtained laparoscopically or by curettage. Serum and PF samples were collected from 56 ovarian endometriosis patients and 40 controls (patients with benign cysts and healthy women). Tissue biglycan levels and serum and PF biglycan concentrations were determined by Western blotting and ELISA, respectively. Biglycan was detected in endometriomas and in benign cysts tissues but differed in glycosylation levels. The PF biglycan concentrations were significantly increased in ovarian endometriosis patients (mean ± SD=220.3 ± 190.5 pg/mg protein) compared to the whole control group (101.9 ± 94.7 pg/mg protein, p<0.001), while serum concentrations did not differ significantly. Biglycan appears to be involved in ovarian pathologies and probably has different roles in benign cysts as compared to ovarian endometriomas.
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Affiliation(s)
- Vida Kocbek
- Faculty of Medicine, Institute of Biochemistry , University of Ljubljana, Ljubljana , Slovenia and
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Xiao S, Li Y, Li T, Chen M, Xu Y, Wen Y, Zhou C. Evidence for decreased expression of ADAMTS-1 associated with impaired oocyte quality in PCOS patients. J Clin Endocrinol Metab 2014; 99:E1015-21. [PMID: 24646063 DOI: 10.1210/jc.2013-4177] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Polycystic ovary syndrome (PCOS) is the most common cause of dysfunctional ovulation-affecting female fertility. A disintegrin and metalloproteinase with thrombospondin-like motifs (ADAMTS-1) is required for normal ovulation and subsequent fertilization, and the expression of ADAMTS-1 may be altered in PCOS granulosa cell (GC)-reflecting abnormalities in ovulatory signaling. OBJECTIVE The purpose of this paper is to analyze the differential expression of ADAMTS-1 in PCOS patients associated with impaired oocyte quality. DESIGN AND SETTING A prospective comparative experimental study was performed at a clinical reproductive medicine center. PATIENTS Women with PCOS (n = 40) and normovulatory controls (n = 40) undergoing controlled ovarian hyperstimulation and in vitro fertilization were recruited in our study. MAIN OUTCOME MEASURES Differential expression of ADAMTS-1 in GCs was analyzed with immunocytochemistry in PCOS patients and normal controls, and ADAMTS-1 mRNA expression was quantified by RT-PCR. Furthermore, the correlation between ADAMTS-1 mRNA and oocyte quality was analyzed. RESULTS The expression of ADAMTS-1 was decreased in PCOS patients compared with normally ovulating women and was closely related to lower oocyte recovery, oocyte maturity, and fertilization rate. CONCLUSION Our study provides evidence that the dysregulated expression of ADAMTS-1 in PCOS may influence oocyte quality-via GCs-oocyte paracrine and endocrine mechanism.
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Affiliation(s)
- Shan Xiao
- Reproductive Medicine Center, First Affiliated Hospital of Sun Yat-Sen University, Guangdong, People's Republic of China 510080
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Xue K, Kim JY, Liu JY, Tsang BK. Insulin-like 3-induced rat preantral follicular growth is mediated by growth differentiation factor 9. Endocrinology 2014; 155:156-67. [PMID: 24169563 DOI: 10.1210/en.2013-1491] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
The communication of somatic cells and oocytes by intrafollicular paracrine factors is essential for follicular growth in the ovary. Insulin-like 3 (INSL3) is a theca cell-secreted paracrine factor. Androgens and growth differentiation factor 9 (GDF9), an oocyte-derived growth factor, are essential for follicular development. Using a rat preantral follicle culture model, we examined in the present study the influence of INSL3 on preantral follicular growth and the molecular mechanisms involved. We have observed that the receptor for INSL3, relaxin/insulin-like family peptide receptor 2 (RXFP2), was exclusively expressed in oocytes. Recombinant INSL3 stimulated Gdf9 expression, preantral follicular growth, and testosterone synthesis in vitro. Inhibition of the cAMP/protein kinase A signaling pathway (with cAMP antagonist, 8-bromoadenosine 3',5'-cyclic monophosphorothioate, Rp-isomer) attenuated INSL3-induced Gdf9 expression and preantral follicular growth. Moreover, knocking down Gdf9 expression (with small interfering RNA) or inhibiting GDF9 signaling (with SB431542, an activin receptor-like kinase receptor 5 inhibitor, or specific inhibitor of mothers against decapentaplegic homolog 3) or androgen action (with flutamide, an androgen receptor antagonist) suppressed INSL3-induced preantral follicular growth. In addition, LH and DHT regulated the expression of Insl3 mRNA in preantral follicles. These observations suggest that INSL3 is a key theca cell-derived growth factor for preantral follicle and that its action is mediated by GDF9.
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Affiliation(s)
- Kai Xue
- State Key Laboratory in Reproductive Medicine (K.X., J.L.), Centre for Clinical Reproductive Medicine, Nanjing Medical University, Nanjing 210029, China; Departments of Obstetrics and Gynecology and Cellular and Molecular Medicine (K.X., J.Y.K., B.K.T.) and Interdisciplinary School of Health Sciences (B.K.T.), University of Ottawa, and Chronic Disease Program (K.X., J.Y.K., B.K.T.), Ottawa Hospital Research Institute, Ottawa K1H 8L6, Canada; and World Class University Biomodulation Major (J.Y.K., B.K.T.), Department of Agricultural Biotechnology, College of Agriculture and Life Sciences, Seoul National University, Seoul 151-742, Republic of Korea
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Yang M, Du J, Lu D, Ren C, Shen H, Qiao J, Chen X, Zhang H. Increased expression of kindlin 2 in luteinized granulosa cells correlates with androgen receptor level in patients with polycystic ovary syndrome having hyperandrogenemia. Reprod Sci 2013; 21:696-703. [PMID: 24336678 DOI: 10.1177/1933719113512536] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
Hyperandrogenemia is the leading defect in patients with polycystic ovary syndrome (PCOS) and considered to be involved in the ovulation dysfunction of PCOS. During the process of ovulation, granulosa cells (GCs) undergo epithelial-mesenchymal transition (EMT), and integrin-interacting protein kindlin 2 is a well-known regulator in EMT. Therefore, our objective here was to compare the expression levels of kindlin 2 in luteinized GCs between patients with PCOS and control women and the relationship between kindlin 2 and PCOS pathogenesis. In this study, kindlin 2 expression was significantly increased in luteinized GCs from patients with PCOS, and kindlin 2 could be induced by testosterone both in vitro and in vivo. Meanwhile, kindlin 2 was positively correlated with androgen receptor (AR) in PCOS GCs. Taken together, kindlin 2 may play a role in luteinized GCs, especially in the case of excess androgen. Further studies are required to assess the specific role of kindlin 2 in follicular development and PCOS pathogenesis.
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Affiliation(s)
- Mei Yang
- 1Key Laboratory of Carcinogenesis and Translational Research, Ministry of Education, and Laboratory of Stem Cell, Development and Reproductive Medicine, Department of Anatomy, Histology and Embryology, Peking University Health Science Center, Beijing, China
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Lebbe M, Woodruff T. Involvement of androgens in ovarian health and disease. Mol Hum Reprod 2013; 19:828-37. [PMID: 24026057 PMCID: PMC3843026 DOI: 10.1093/molehr/gat065] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2013] [Revised: 09/04/2013] [Accepted: 09/05/2013] [Indexed: 11/13/2022] Open
Abstract
In women, ovary and adrenal gland produce androgens. Androgens are essential drivers of the primordial to antral follicle development, prior to serving as substrate for estrogen production in the later stages of folliculogenesis. Androgens play a crucial role in the follicular-stromal intertalk by fine tuning the extracellular matrix and vessel content of the ovarian stroma. Local auto-and paracrine factors regulate androgen synthesis in the pre-antral follicle. Androgen excess is a hallmark of polycystic ovary syndrome and is a key contributor in the exaggerated antral follicle formation, stromal hyperplasia and hypervascularity. Hyperandrogenaemia overrides the follicular-stromal dialog, resulting in follicular arrest and disturbed ovulation. On the other hand, androgen deficiency is likely to have a negative impact on fertility as well, and further research is needed to examine the benefits of androgen-replacement therapy in subfertility.
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Affiliation(s)
- M. Lebbe
- Centre for Endocrinology, Diabetes and Metabolism (CEDAM), School of Clinical & Experimental Medicine, University of Birmingham, Birmingham B15 2TT, UK
| | - T.K. Woodruff
- Department of Obstetrics and Gynecology, Feinberg School of Medicine, Northwestern University, 303 E Superior Street, Lurie 10-121, Chicago, IL 60610, USA
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Zhao KK, Cui YG, Jiang YQ, Wang J, Li M, Zhang Y, Ma X, Diao FY, Liu JY. Effect of HSP10 on apoptosis induced by testosterone in cultured mouse ovarian granulosa cells. Eur J Obstet Gynecol Reprod Biol 2013; 171:301-6. [DOI: 10.1016/j.ejogrb.2013.09.026] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 07/12/2013] [Accepted: 09/22/2013] [Indexed: 02/04/2023]
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Yu Y, Zhao Y, Li R, Li L, Zhao H, Li M, Sha J, Zhou Q, Qiao J. Assessment of the Risk of Blastomere Biopsy during Preimplantation Genetic Diagnosis in a Mouse Model: Reducing Female Ovary Function with an Increase in Age by Proteomics Method. J Proteome Res 2013; 12:5475-86. [DOI: 10.1021/pr400366j] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Affiliation(s)
- Yang Yu
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Beijing
Key Laboratory of Reproductive Endocrinology and Assisted Reproductive
Technology, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Key
Laboratory of Assisted Reproduction, Ministry of Education, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Yue Zhao
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Key
Laboratory of Assisted Reproduction, Ministry of Education, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Rong Li
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Key
Laboratory of Assisted Reproduction, Ministry of Education, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Li Li
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Hongcui Zhao
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Min Li
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
| | - Jiahao Sha
- Laboratory
of Reproductive Medicine, Department of Histology and Embryology, Nanjing Medical University, No. 140 Hanzhong Road, Gulou District, Nanjing 210029, China
| | - Qi Zhou
- State
Key Laboratory of Reproductive Biology, Institute of Zoology, Chinese Academy of Sciences, No. 1 Beichen Xi Road, Chaoyang District, Beijing 100101, China
| | - Jie Qiao
- Center
of Reproductive Medicine, Department of Obstetrics and Gynecology, Peking University Third Hospital, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Beijing
Key Laboratory of Reproductive Endocrinology and Assisted Reproductive
Technology, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
- Key
Laboratory of Assisted Reproduction, Ministry of Education, No. 49 HuaYuan Bei Road, HaiDian District, Beijing 100191, China
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Dowling AR, Nedorezov LB, Qiu X, Marino JS, Hill JW. Genetic factors modulate the impact of pubertal androgen excess on insulin sensitivity and fertility. PLoS One 2013; 8:e79849. [PMID: 24278193 PMCID: PMC3835926 DOI: 10.1371/journal.pone.0079849] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2013] [Accepted: 09/25/2013] [Indexed: 01/31/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder of reproductive age women. The syndrome is caused by a combination of environmental influences and genetic predisposition. Despite extensive efforts, the heritable factors contributing to PCOS development are not fully understood. The objective of this study was to test the hypothesis that genetic background contributes to the development of a PCOS-like reproductive and metabolic phenotype in mice exposed to excess DHEA during the pubertal transition. We tested whether the PCOS phenotype would be more pronounced on the diabetes-prone C57BL/6 background than the previously used strain, BALB/cByJ. In addition, we examined strain-dependent upregulation of the expression of ovarian and extra-ovarian candidate genes implicated in human PCOS, genes containing known strain variants, and genes involved with steroidogenesis or insulin sensitivity. These studies show that there are significant strain-related differences in metabolic response to excess androgen exposure during puberty. Additionally, our results suggest the C57BL/6J strain provides a more robust and uniform experimental platform for PCOS research than the BALB/cByJ strain.
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Affiliation(s)
- Abigail R. Dowling
- University of Toledo Medical Center, Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo Medical Center, Toledo, Ohio, United States of America
| | - Laura B. Nedorezov
- University of Toledo Medical Center, Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo Medical Center, Toledo, Ohio, United States of America
| | - Xiaoliang Qiu
- University of Toledo Medical Center, Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo Medical Center, Toledo, Ohio, United States of America
| | - Joseph S. Marino
- Department of Kinesiology, University of North Carolina, Charlotte, North Carolina, United States of America
| | - Jennifer W. Hill
- University of Toledo Medical Center, Center for Diabetes and Endocrine Research, Department of Physiology and Pharmacology, University of Toledo Medical Center, Toledo, Ohio, United States of America
- Dept. of Obstetrics-Gynecology, University of Toledo Medical Center, Toledo, Ohio, United States of America
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Polymorphisms of transcription factor-7-like 2 (TCF7L2) gene in Tunisian women with polycystic ovary syndrome (PCOS). Gene 2013; 533:554-7. [PMID: 24157263 DOI: 10.1016/j.gene.2013.09.104] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2013] [Revised: 08/04/2013] [Accepted: 09/26/2013] [Indexed: 02/07/2023]
Abstract
BACKGROUND AND AIMS Polycystic ovary syndrome (PCOS) is a common endocrine disorder that affects women in their child-bearing age, and is often associated with insulin resistance and type 2 diabetes (T2DM). Given the overlap between PCOS and T2DM, we investigated the association of transcription factor-7-like 2 (TCF7L2) variants rs4506565, rs7903146, rs12243326, and rs12255372 with the susceptibility to PCOS. SUBJECTS AND METHODS Study subjects comprised 119 Tunisian women with PCOS (mean age 29.8±4.7years), and 150 control women (mean age 30.6±5.9years). TCF7L2 genotyping was done by the allelic discrimination/real-time PCR method. RESULTS Minor allele frequencies (MAFs) of rs4506565 (P=0.61), rs7903146 (P=0.68), rs12243326 (P=0.56), and rs12255372 (P=0.60) were comparable between PCOS cases and control subjects. As the four tested TCF7L2 variants were in linkage disequilibrium, 4-locus (rs4506565, rs7903146, rs12243326, rs12255372) haplotype analysis demonstrated that haplotype 2111 was initially negatively associated with PCOS [P=0.035; OR (95% CI)=0.13 (0.02-0.85)], which was later lost upon correcting for multiple comparisons [Pc=0.248]. CONCLUSION Our data suggest that there is weak or no contribution of TCF7L2 gene polymorphism to PCOS in Tunisian women. Further studies with larger samples are necessary to confirm this observation.
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Abstract
Polycystic ovarian syndrome is universally the most common endocrinopathy in women of reproductive age. It is characterized by composite clinical phenotypes reflecting the reproductive impact of ovarian dysfunction (androgen excess, oligo-/anovulation, polycystic ovary) and metabolic abnormalities (insulin resistance, obesity) with widely varying symptoms among the affected. Studies have shown a clear pattern of disparity in clinical manifestations of its component phenotypes across ethnic populations. Recent genetic association studies suggested differential genetic background that could contribute to the observed ethnic disparity. We summarize the current status in genetic studies of the disorder in different populations with a focus on ethnicity. Especially, we highlight and discuss the applications of recent developments in DNA sequencing, global transcriptional and epigenetic profiling that could help to unravel the molecular basis of the interethnic difference in the pathogenesis of the syndrome. It is hoped that identification and characterization of population-specific structural genetic and functional genomic patterns could help to not only deepen our understanding of the aetiology but also develop more efficient strategies for treatment and prevention of polycystic ovarian syndrome.
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Affiliation(s)
- Shuxia Li
- Institute of Clinical Research, Unit of Human Genetics, University of Southern Denmark, Sdr. Boulevard 29, Odense, Denmark.
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Schmidt J, Weijdegard B, Mikkelsen AL, Lindenberg S, Nilsson L, Brannstrom M. Differential expression of inflammation-related genes in the ovarian stroma and granulosa cells of PCOS women. Mol Hum Reprod 2013; 20:49-58. [DOI: 10.1093/molehr/gat051] [Citation(s) in RCA: 69] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Insenser M, Montes-Nieto R, Murri M, Escobar-Morreale HF. Proteomic and metabolomic approaches to the study of polycystic ovary syndrome. Mol Cell Endocrinol 2013; 370:65-77. [PMID: 23422073 DOI: 10.1016/j.mce.2013.02.009] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2012] [Revised: 02/05/2013] [Accepted: 02/11/2013] [Indexed: 12/14/2022]
Abstract
Polycystic ovary syndrome (PCOS) is considered a complex multifactorial disorder resulting from the interaction of genetic, environmental, and lifestyle influences. Nontargeted proteomics and metabolomics have been used in the past years with the aim of identifying molecules potentially involved in the pathophysiology of this frequent disorder. The biomolecules identified so far participate in many metabolic pathways, including energy metabolism (glucose and lipid metabolism), protein metabolic processes and protein folding, cytoskeleton structure, immune response, inflammation and iron metabolism, fibrinolysis and thrombosis, oxidative stress and intracellular calcium metabolism. These molecules provide key information about molecular functions altered in PCOS and raise questions concerning their precise role in the pathogenesis of this syndrome. The biomolecules identified by nontargeted proteomic and metabolomic approaches should be considered as candidates in future studies aiming to define specific molecular phenotypes of PCOS.
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Affiliation(s)
- María Insenser
- Diabetes, Obesity and Human Reproduction Research Group, Hospital Universitario Ramón y Cajal & Universidad de Alcalá, E-28034 Madrid, Spain
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Effect of Hsp27 on early embryonic development in the mouse. Reprod Biomed Online 2013; 26:491-9. [DOI: 10.1016/j.rbmo.2013.01.005] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2012] [Revised: 01/06/2013] [Accepted: 01/08/2013] [Indexed: 11/18/2022]
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Dumesic DA, Richards JS. Ontogeny of the ovary in polycystic ovary syndrome. Fertil Steril 2013; 100:23-38. [PMID: 23472949 DOI: 10.1016/j.fertnstert.2013.02.011] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2012] [Revised: 02/05/2013] [Accepted: 02/06/2013] [Indexed: 12/11/2022]
Abstract
Activation of primordial follicles into the growing pool, selection of the dominant follicle, and its eventual ovulation require complex endocrine and metabolic interactions as well as intraovarian paracrine signals to coordinate granulosa cell proliferation, theca cell differentiation, and oocyte maturation. Early preantral follicle development relies mostly upon mesenchymal-epithelial cell interactions, intraovarian paracrine signals, and oocyte-secreted factors, whereas development of the antral follicle depends on circulating gonadotropins as well as locally derived regulators. In women with polycystic ovary syndrome (PCOS), ovarian hyperandrogenism, hyperinsulinemia from insulin resistance, and altered intrafollicular paracrine signaling perturb the activation, survival, growth, and selection of follicles, causing accumulation of small antral follicles within the periphery of the ovary, giving it a polycystic morphology. Altered adipocyte-ovarian interactions further compound these adverse events on follicle development and also can harm the oocyte, particularly in the presence of increased adiposity. Finally, endocrine antecedents of PCOS occur in female infants born to mothers with PCOS, which suggests that interactions between genes and the maternal-fetal hormonal environment may program ovarian function after birth.
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Affiliation(s)
- Daniel A Dumesic
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, California 90095, USA.
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Butler MS, Yang X, Ricciardelli C, Liang X, Norman RJ, Tilley WD, Hickey TE. Small glutamine-rich tetratricopeptide repeat-containing protein alpha is present in human ovaries but may not be differentially expressed in relation to polycystic ovary syndrome. Fertil Steril 2013; 99:2076-83.e1. [PMID: 23433514 DOI: 10.1016/j.fertnstert.2013.01.140] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2011] [Revised: 01/25/2013] [Accepted: 01/25/2013] [Indexed: 11/26/2022]
Abstract
OBJECTIVE To evaluate the expression and function of small glutamine-rich tetratricopeptide repeat-containing protein alpha (SGTA), an androgen receptor (AR) molecular chaperone, in human ovarian tissues. DESIGN Examine the effect of SGTA on AR subcellular localization in granulosa tumor cells (KGN) and SGTA expression in ovarian tissues. SETTING University-based research laboratory. PATIENT(S) Archived tissues from premenopausal women and granulosa cells from infertile women receiving assisted reproduction. INTERVENTION(S) None. MAIN OUTCOME MEASURE(S) AR subcellular localization and SGTA protein or mRNA levels. RESULT(S) SGTA and AR proteins were expressed in the cytoplasm of KGN cells and exposure to androgen stimulated AR nuclear localization. SGTA protein knockdown increased AR nuclear localization at low (0-0.1 nmol/L) but not high (1-10 nmol/L) concentrations of androgen hormone. In ovarian tissues, SGTA was localized to the cytoplasm of granulosa cells at all stages of folliculogenesis and in thecal cells of antral follicles. SGTA protein levels were similar when comparing primordial and primary follicles within core biopsies (n = 40) from women with and without polycystic ovary syndrome (PCOS). Likewise, SGTA mRNA levels were not significantly different in granulosa cells from preovulatory follicles after hyperstimulation of women with and without PCOS. CONCLUSION(S) SGTA is present in human ovaries and has the potential to modulate AR signalling, but it may not be differentially expressed in PCOS.
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Affiliation(s)
- Miriam S Butler
- Dame Roma Mitchell Cancer Research Laboratories, School of Medicine, University of Adelaide, Adelaide, South Australia, Australia
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Gene expression profiling of granulosa cells from PCOS patients following varying doses of human chorionic gonadotropin. J Assist Reprod Genet 2013; 30:341-52. [PMID: 23381551 DOI: 10.1007/s10815-013-9935-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2012] [Accepted: 01/15/2013] [Indexed: 10/27/2022] Open
Abstract
PURPOSE Human chorionic gonadotrophin (hCG) has been used to induce ovulation and oocyte maturation. Although the most common dose of hCG used in IVF is 10,000 IU, there are reports that suggest 5,000 IU is sufficient to yield similar results. The objective of this study is to evaluate the dose dependent differences in gene expression of granulosa cells following various doses of hCG treatment. METHODS Patients with polycystic ovarian syndrome (PCOS) were stimulated for IVF treatment. The hCG injection was either withheld or given at 5,000 or 10,000 IU. Granulosa cells from the follicular fluids have been collected for RNA isolation and analyzed using Affymetrix genechip arrays. RESULTS Unsupervised hierarchical clustering based on whole gene expression revealed two distinct groups of patients in this experiment. All untreated patients were clustered together whereas hCG-treated patients separated to a different group regardless of the dose. A large number of the transcripts were similarly up- or down-regulated across both hCG doses (2229 and 1945 transcripts, respectively). However, we observed dose-dependent statistically significant differences in gene expression in only 15 transcripts. CONCLUSIONS Although hCG injection caused a major change in the gene expression profile of granulosa cells, 10,000 IU hCG resulted in minimal changes in the gene expression profiles of granulosa cells as compared with 5,000 IU. Thus, based on our results, we suggest the use of 10,000 IU hCG should be reconsidered in PCOS patients.
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Suresh PS, Venkatesh T. Computational interrogation of cis-regulatory elements of genes that are common targets of luteotropin and luteolysin in the primate corpus luteum. Gene 2013; 515:403-9. [DOI: 10.1016/j.gene.2012.12.050] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2012] [Accepted: 12/03/2012] [Indexed: 10/27/2022]
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70
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Zou S, Sang Q, Wang H, Feng R, Li Q, Zhao X, Xing Q, Jin L, He L, Wang L. Common genetic variation in CYP1B1 is associated with concentrations of T₄, FT₃ and FT₄ in the sera of polycystic ovary syndrome patients. Mol Biol Rep 2013; 40:3315-20. [PMID: 23283740 DOI: 10.1007/s11033-012-2406-1] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2012] [Accepted: 12/18/2012] [Indexed: 01/02/2023]
Abstract
CYP1B1 encodes an estrogen enzyme that oxidizes 17β-estradiol to 4-hydroxyestradiol. The evidence demonstrates there may be a relationship between CYP1B1 and thyroid function. To date, no study has evaluated if genetic polymorphisms that regulate concentrations of serum FT3 and FT4 contribute to Polycyctic Ovary Syndrome (PCOS). To identify polymorphisms in the CYP1B1 locus associated with PCOS, we genotyped three common polymorphisms across the CYP1B1 locus in 226 patients. A test for association of common variants with susceptibility to PCOS was conducted in a large cohort of 609 subjects. The functional polymorphism CYP1B1 L432V (rs1056836) is associated with serum T4 (P = 0.003), serum FT3 (P < 0.001) and serum FT4 concentrations (P < 0.001). Our study provides the first evidence that genetic variants in CYP1B1 can be associated with serum T4, FT4 and FT3 levels in PCOS. These findings imply novel pathophysiological links between the CYP1B1 locus and thyroid function in PCOS.
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Affiliation(s)
- Shien Zou
- Department of Gynecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai 200011, China
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71
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Charlier C, Montfort J, Chabrol O, Brisard D, Nguyen T, Le Cam A, Richard-Parpaillon L, Moreews F, Pontarotti P, Uzbekova S, Chesnel F, Bobe J. Oocyte-somatic cells interactions, lessons from evolution. BMC Genomics 2012; 13:560. [PMID: 23083410 PMCID: PMC3532176 DOI: 10.1186/1471-2164-13-560] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2012] [Accepted: 10/16/2012] [Indexed: 12/31/2022] Open
Abstract
Background Despite the known importance of somatic cells for oocyte developmental competence acquisition, the overall mechanisms underlying the acquisition of full developmental competence are far from being understood, especially in non-mammalian species. The present work aimed at identifying key molecular signals from somatic origin that would be shared by vertebrates. Results Using a parallel transcriptomic analysis in 4 vertebrate species - a teleost fish, an amphibian, and two mammals - at similar key steps of developmental competence acquisition, we identified a large number of species-specific differentially expressed genes and a surprisingly high number of orthologous genes exhibiting similar expression profiles in the 3 tetrapods and in the 4 vertebrates. Among the evolutionary conserved players participating in developmental competence acquisition are genes involved in key processes such as cellular energy metabolism, cell-to-cell communications, and meiosis control. In addition, we report many novel molecular actors from somatic origin that have never been studied in the vertebrate ovary. Interestingly, a significant number of these new players actively participate in Drosophila oogenesis. Conclusions Our study provides a comprehensive overview of evolutionary-conserved mechanisms from somatic origin participating in oocyte developmental competence acquisition in 4 vertebrates. Together our results indicate that despite major differences in ovarian follicular structure, some of the key players from somatic origin involved in oocyte developmental competence acquisition would be shared, not only by vertebrates, but also by metazoans. The conservation of these mechanisms during vertebrate evolution further emphasizes the important contribution of the somatic compartment to oocyte quality and paves the way for future investigations aiming at better understanding what makes a good egg.
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Affiliation(s)
- Cathy Charlier
- INRA, UR LPGP Fish Physiology and Genomics, Campus de Beaulieu, Rennes, France
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Elucidation of regulatory mechanisms revealed by human promoter sequence analysis of genes co-expressed in forskolin-treated theca cells in PCOS. Arch Gynecol Obstet 2012; 287:477-85. [DOI: 10.1007/s00404-012-2580-3] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/07/2012] [Accepted: 09/20/2012] [Indexed: 10/27/2022]
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73
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Xue K, Liu JY, Murphy BD, Tsang BK. Orphan nuclear receptor NR4A1 is a negative regulator of DHT-induced rat preantral follicular growth. Mol Endocrinol 2012; 26:2004-15. [PMID: 23028064 DOI: 10.1210/me.2012-1200] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Nuclear receptor subfamily 4 group A member1 (NR4A1), an orphan nuclear receptor, is involved in the transcriptional regulation of thecal cell androgen biosynthesis and paracrine factor insulin-like 3 (INSL3) expression. Androgens are known to play an important regulatory role in ovarian follicle growth. Using a chronically androgenized rat model, a preantral follicle culture model and virus-mediated gene delivery, we examined the role and regulation of NR4A1 in the androgenic control of preantral follicular growth. In the present study, Ki67 staining was increased in preantral follicles on ovarian sections from 5α-dihydrotestosterone (DHT)-treated rats. Preantral follicles from DHT-treated rats cultured for 4 d exhibited increased growth and up-regulation of mRNA abundance of G(1)/S-specific cyclin-D2 (Ccnd2) and FSH receptor (Fshr). Similarly, DHT (1 μm) increased preantral follicular growth and Ccnd2 and Fshr mRNA abundance in vitro. The NR4A1 expression was high in theca cells and was down-regulated by DHT in vivo and in vitro. Forced expression of NR4A1 augmented preantral follicular growth, androstenedione production, and Insl3 expression in vitro. Inhibiting the action of androgen (with androgen receptor antagonist flutamide) or INSL3 (with INSL3 receptor antagonist INSL3 B-chain) reduced NR4A1-induced preantral follicular growth. Furthermore, NR4A1 overexpression enhanced DHT-induced preantral follicular growth, a response attenuated by inhibiting INSL3. In conclusion, DHT promotes preantral follicular growth and attenuates thecal NR4A1 expression in vivo and in vitro. Our findings are consistent with the notion that NR4A1 serves as an important point of negative feedback to minimize the excessive preantral follicle growth in hyperandrogenism.
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Affiliation(s)
- Kai Xue
- State Key Laboratory in Reproductive Medicine, Centre for Clinical Reproductive Medicine, Nanjing Medical University, Nanjing 210029, Jiangsu Province, China
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74
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Guzman L, Adriaenssens T, Ortega-Hrepich C, Albuz FK, Mateizel I, Devroey P, De Vos M, Smitz J. Human antral follicles <6 mm: a comparison between in vivo maturation and in vitro maturation in non-hCG primed cycles using cumulus cell gene expression. Mol Hum Reprod 2012; 19:7-16. [PMID: 22956770 DOI: 10.1093/molehr/gas038] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Within the context of an oocyte in vitro maturation (IVM) program for reproductive treatment, oocyte cumulus complexes (COCs) derived from follicles <6 mm in patients with PCOS were matured in vitro. Key transcripts related to meiotic maturation (FSHR, LHCGR, EGFR, PGR) and oocyte competence (AREG, ADAMTS, HAS2, PTGS2) were quantified in cumulus cells (CCs) before and after maturation. Control CC samples were collected from PCOS and normo-ovulatory patients who had undergone conventional gonadotrophin stimulation for IVF/ICSI. Additional control samples from a non-stimulated condition were obtained ex vivo from patients undergoing ovariectomy for fertility preservation. Expression data from CCs from follicles with a diameter of <6 mm before (IVM-CCs) and after in vitro maturation (IVM-CCs) were obtained after pooling CCs into four groups in relation to the percentage of matured (MII) oocytes obtained after 40 h of IVM (0; 40-60; 61-80; 100% MII) and values were compared with in vivo matured controls (IVO-CCs). Genes encoding key receptors mediating meiotic resumption are expressed in human antral follicles of <6 mm before and after IVM. The expression levels of FSHR, EGFR and PGR in CCs were significantly down-regulated in the IVO-CCs groups and in the 100% MII IVM group compared with the BM groups; all the receptors studied in the 100% MII IVM group reached an expression profile similar to that of IVO-CCs. However, after maturation in a conventional IVF/ICSI cycle, IVO-CCs from large follicles contained significantly increased levels of ADAMTS1, AREG, HAS2 and PTGS2 compared with IVM-CCs and IVM-CCs; the expression patterns for these genes in all IVM-CCs were unchanged compared with IVM-CCs. In conclusion, genes encoding receptors involved in oocyte meiotic resumption appeared to be expressed in CCs of small human antral follicles. Expression levels of genes-encoding factors reflecting oocyte competence were significantly altered in IVM-CCs compared with in vivo matured oocytes from large follicles. Observed differences might be explained by the different stimulation protocols, doses of gonadotrophin or by the intrinsic differences between in vivo and in vitro maturation.
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Affiliation(s)
- L Guzman
- Laboratory of Follicular Biology, UZ Brussel, Laarbeeklaan 101, 1090 Brussels, Belgium.
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Jones MR, Chazenbalk G, Xu N, Chua AK, Eigler T, Mengesha E, Chen YH, Lee JM, Pall M, Li X, Chen YDI, Taylor KD, Mathur R, Krauss RM, Rotter JI, Legro RS, Azziz R, Goodarzi MO. Steroidogenic regulatory factor FOS is underexpressed in polycystic ovary syndrome (PCOS) adipose tissue and genetically associated with PCOS susceptibility. J Clin Endocrinol Metab 2012; 97:E1750-7. [PMID: 22723319 PMCID: PMC3431575 DOI: 10.1210/jc.2011-2153] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Polycystic ovary syndrome (PCOS) is a heterogeneous common genetic disorder characterized by hyperandrogenemia and insulin resistance. Alterations in gene expression profiles of the ovary and adipose tissue identified the candidate gene FBJ murine osteosarcoma viral oncogene homolog (FOS) for further investigation of expression changes in metabolic tissues and genetic studies. OBJECTIVE The objective of the study was to confirm the underexpression of the FOS gene in sc adipose and determine whether variants in this gene are risk factors for PCOS. DESIGN RT-PCR was performed in sc fat from women with and without PCOS. Genotyping of single-nucleotide polymorphisms in the FOS locus was performed to test for association with PCOS. SETTING The study was conducted at a tertiary care academic institution. PARTICIPANTS Twenty-two PCOS and 13 control subjects were recruited for gene expression studies. We assembled a discovery genotyping cohort of 354 cases and 161 controls and a replication cohort of 476 cases and 315 controls, all of whom were Caucasian. MAIN MEASUREMENTS Gene expression by quantitative real-time RT-PCR, FOS genotype, and PCOS status were measured. RESULTS FOS expression was confirmed to be reduced in PCOS adipose tissue. Three single-nucleotide polymorphisms were significantly associated with PCOS in the discovery cohort (rs8006998, P = 0.0031; rs8013918, P = 0.0006; rs8013942, P = 0.0087). rs8006998 was also associated with PCOS in the replication cohort (P = 0.013). CONCLUSIONS Differential gene expression in sc fat and genetic association at the FOS locus in PCOS subjects implicates a role for this transcription factor in PCOS. FOS dysfunction may be a common factor between hyperandrogenism and insulin resistance.
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Affiliation(s)
- Michelle R Jones
- Division of Endocrinology, Diabetes, and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, 8700 Beverly Boulevard, Los Angeles, California 90048, USA
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76
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Skiadas CC, Duan S, Correll M, Rubio R, Karaca N, Ginsburg ES, Quackenbush J, Racowsky C. Ovarian reserve status in young women is associated with altered gene expression in membrana granulosa cells. Mol Hum Reprod 2012; 18:362-71. [PMID: 22355044 PMCID: PMC3378309 DOI: 10.1093/molehr/gas008] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2010] [Revised: 02/02/2012] [Accepted: 02/09/2012] [Indexed: 01/13/2023] Open
Abstract
Diminished ovarian reserve (DOR) is a challenging diagnosis of infertility, as there are currently no tests to predict who may become affected with this condition, or at what age. We designed the present study to compare the gene expression profile of membrana granulosa cells from young women affected with DOR with those from egg donors of similar age and to determine if distinct genetic patterns could be identified to provide insight into the etiology of DOR. Young women with DOR were identified based on FSH level in conjunction with poor follicular development during an IVF cycle (n = 13). Egg donors with normal ovarian reserve (NOR) comprised the control group (n = 13). Granulosa cells were collected following retrieval, RNA was extracted and microarray analysis was conducted to evaluate genetic differences between the groups. Confirmatory studies were undertaken with quantitative RT-PCR (qRT-PCR). Multiple significant differences in gene expression were observed between the DOR patients and egg donors. Two genes linked with ovarian function, anti-Mullerian hormone (AMH) and luteinizing hormone receptor (LHCGR), were further analyzed with qRT-PCR in all patients. The average expression of AMH was significantly higher in egg donors (adjusted P-value = 0.01), and the average expression of LHCGR was significantly higher in DOR patients (adjusted P-value = 0.005). Expression levels for four additional genes, progesterone receptor membrane component 2 (PGRMC2), prostaglandin E receptor 3 (subtype EP3) (PTGER3), steroidogenic acute regulatory protein (StAR), and StAR-related lipid transfer domain containing 4 (StarD4), were validated in a group consisting of five NOR and five DOR patients. We conclude that gene expression analysis has substantial potential to determine which young women may be affected with DOR. More importantly, our analysis suggests that DOR patients fall into two distinct subgroups based on gene expression profiles, indicating that different mechanisms may be involved during development of this pathology.
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Affiliation(s)
- Christine C. Skiadas
- Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, ASB 1+3, Rm 082, Boston, MA 02115, USA
| | - Shenghua Duan
- Center for Cancer Computational Biology, Department of Biostatistics and Computational Biology, Dana Farber Cancer Center, Boston, MA 02115, USA
| | - Mick Correll
- Center for Cancer Computational Biology, Department of Biostatistics and Computational Biology, Dana Farber Cancer Center, Boston, MA 02115, USA
| | - Renee Rubio
- Center for Cancer Computational Biology, Department of Biostatistics and Computational Biology, Dana Farber Cancer Center, Boston, MA 02115, USA
| | - Nilay Karaca
- Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, ASB 1+3, Rm 082, Boston, MA 02115, USA
| | - Elizabeth S. Ginsburg
- Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, ASB 1+3, Rm 082, Boston, MA 02115, USA
| | - John Quackenbush
- Center for Cancer Computational Biology, Department of Biostatistics and Computational Biology, Dana Farber Cancer Center, Boston, MA 02115, USA
- Department of Biostatistics, Harvard School of Public Health, Boston, MA 02115, USA
| | - Catherine Racowsky
- Department of Obstetrics, Gynecology, and Reproductive Biology, Brigham and Women's Hospital and Harvard Medical School, 75 Francis Street, ASB 1+3, Rm 082, Boston, MA 02115, USA
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Yalamanchi SK, Sam S, Cardenas MO, Holaday LW, Urbanek M, Dunaif A. Association of fibrillin-3 and transcription factor-7-like 2 gene variants with metabolic phenotypes in PCOS. Obesity (Silver Spring) 2012; 20:1273-8. [PMID: 22301903 PMCID: PMC3346885 DOI: 10.1038/oby.2011.400] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Polycystic ovary syndrome (PCOS) is a complex genetic disease characterized by heritable reproductive and metabolic abnormalities. Genetic variants associated with the reproductive phenotype have been mapped to the fibrillin-3 (FBN3) gene and to a novel transcription factor-7-like 2 (TCF7L2) locus (rs11196236 G). The association of these genetic variants with metabolic phenotypes was investigated in 31 PCOS and 18 control women of European ancestry. The insulinogenic index during an oral glucose tolerance test (ΔI30/ΔG30) and insulin secretion rates at the maximal dose during a graded-glucose infusion (ISRmax) were used as indexes of insulin secretion. Endogenous glucose production (EGP) and insulin sensitivity (M/I) were determined during a euglycemic clamp. The disposition index (DI) was calculated using M/I and ΔI30/ΔG30 or ISRmax. Compared with noncarriers (n = 10) and control (n = 10), M/I was decreased (P = 1.1 × 10(-5)) in heterozygous and homozygous PCOS carriers (n = 14) of rs11196236 G and this variant predicted M/I (partial r(2) = 0.34, P = 0.005) in a regression analysis. Postabsorptive EGP tended to be higher (P = 0.040) in heterozygous and homozygous PCOS carriers of the FBN3-associated allele (n = 12), allele 8 of D19S884 (FBN3(+)), compared to PCOS noncarriers (n = 19). PCOS carriers of the rs12255372 T (TCF7L2 Caucasian type 2 diabetes mellitus (T2D) locus) had no significant associated metabolic phenotypes. We conclude that rs11196236 G TCF7L2 variant is associated with peripheral insulin resistance in PCOS but this effect is not seen in control women. The FBN3 risk allele may be associated with changes in basal glucose homeostasis in PCOS. These findings require replication in additional PCOS cohorts.
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Affiliation(s)
- Sudha K Yalamanchi
- Division of Endocrinology, Metabolism, and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, USA
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78
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He J, Wang L, Liu J, Liu F, Li X. A meta-analysis on the association between PPAR-γ Pro12Ala polymorphism and polycystic ovary syndrome. J Assist Reprod Genet 2012; 29:669-77. [PMID: 22527903 DOI: 10.1007/s10815-012-9772-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2012] [Accepted: 04/09/2012] [Indexed: 10/28/2022] Open
Abstract
PURPOSE To investigate the influence of the peroxisome proliferator activated receptor gamma (PPAR-γ) Pro12Ala polymorphism on the susceptibility of polycystic ovary syndrome (PCOS) and body mass index (BMI), fast insulin levels, homeostasis model assessment of insulin resistance (HOMA-IR) in PCOS patients. METHODS PubMed, EMBASE, MEDLINE and CENTRAL databases were searched to identify eligible studies. We then conducted a meta-analysis to examine the association between Pro12Ala polymorphism and PCOS. RESULTS Seventeen eligible studies, including 2,149 patients and 2,124 controls were enrolled in this meta-analysis. Pro12Ala polymorphism was significantly associated with the susceptibility of PCOS (odds ratio [OR] 0.74, 95 % confidence interval [CI] [0.61, 0.90] for allele; OR 0.70, 95 % CI [0.57, 0.86] for genotype). In the European subgroup of PCOS, the X/Ala genotype was associated with lower BMI (mean difference [MD] -1.08, 95 % CI [-2.08, -0.09]) and fast insulin levels (MD -19.82, 95 % CI [-34.07, -5.58]). However, this polymorphism did not display an impact on HOMA-IR in PCOS patients. CONCLUSIONS Ala variant would decrease the risk of PCOS and result in lower BMI and fast insulin levels in a European population, but had no impact on HOMA-IR in PCOS patients. Further studies are required to elucidate these associations more clear.
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Affiliation(s)
- Junli He
- Department of Urology, Children's Hospital of Chongqing Medical University, 136 Zhongshan 2nd Road, Yuzhong District, Chongqing, 400014, People's Republic of China
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79
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Solano ME, Sander VA, Ho H, Motta AB, Arck PC. Systemic inflammation, cellular influx and up-regulation of ovarian VCAM-1 expression in a mouse model of polycystic ovary syndrome (PCOS). J Reprod Immunol 2011; 92:33-44. [PMID: 22018827 DOI: 10.1016/j.jri.2011.09.003] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/17/2011] [Revised: 09/07/2011] [Accepted: 09/23/2011] [Indexed: 10/16/2022]
Abstract
PCOS, a major cause of anovulatory sterility, is associated with obesity, insulin resistance and chronic inflammation. New evidence suggests that the immune system aggravates the clinical features of PCOS. Our aim was to study the immune, metabolic and endocrine features of a mouse model of PCOS elicited by androgenisation using dehydroepiandrosterone (DHEA). We observed a significant weight gain and insulin resistance in DHEA-androgenised mice, coupled with the formation of ovarian follicular cysts. DHEA up-regulated the expression of vascular cell adhesion molecule (VCAM)-1 and intercellular adhesion molecule (ICAM)-1 in the granulosa cell layer of the majority of cysts, and VCAM-1 expression in the theca cell layer of all follicles and cysts. The expression of these markers was low in control tissue. Peritoneal cells from PCOS-mice showed enhanced production of inflammatory cytokines, suggesting an association between chronic inflammation and PCOS. In addition, DHEA-androgenisation induced the activation of CD4(+) cells both in vivo and in vitro, and their expression of the respective ligands for VCAM-1 and ICAM-1, VLA-4 and LFA-1, as assessed in vitro. CD4(+) cells were present in androgenised ovaries, especially in the granulosa cell layer of cysts with high VCAM-1 expression. Herein, we present novel evidence that the immune system is activated systemically and locally in a mouse model for PCOS. We propose that VCAM-1 is involved in aggravating PCOS symptoms by promoting leukocyte recruitment to the ovaries and perpetuating local inflammation. These findings offer novel therapeutic opportunities for PCOS, such as blockage of VCAM-1 expression.
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Affiliation(s)
- María Emilia Solano
- Laboratory for Experimental Feto-Maternal Medicine, Department of Obstetrics and Fetal Medicine, University Medical Center Hamburg-Eppendorf, Martinistr. 52, 20246 Hamburg, Germany.
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Unluturk U, Harmanci A, Kocaefe C, Yildiz BO. The Genetic Basis of the Polycystic Ovary Syndrome: A Literature Review Including Discussion of PPAR-gamma. PPAR Res 2011; 2007:49109. [PMID: 17389770 PMCID: PMC1820621 DOI: 10.1155/2007/49109] [Citation(s) in RCA: 48] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/19/2006] [Revised: 11/24/2006] [Accepted: 12/03/2006] [Indexed: 02/06/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is the most common endocrine disorder of the women of reproductive age. Familial clustering of PCOS has been consistently reported suggesting that genetic factors play a role in the development of the syndrome although PCOS cases do not exhibit a clear pattern of Mendelian inheritance. It is now well established that PCOS represents a complex trait similar to type-2 diabetes and obesity, and that both inherited and environmental factors contribute to the PCOS pathogenesis. A large number of functional candidate genes have been tested for association or linkage with PCOS phenotypes with more negative than positive findings. Lack of universally accepted diagnostic criteria, difficulties in the assignment of male phenotype, obscurity in the mode of inheritance, and particularly small sample size of the study populations appear to be major limitations for the genetic studies of PCOS. In the near future, utilizing the genome-wide scan approach and the HapMap project will provide a stronger potential for the genetic analysis of the syndrome.
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Affiliation(s)
- Ugur Unluturk
- Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
| | - Ayla Harmanci
- Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
- Endocrinology and Metabolism Unit, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
| | - Cetin Kocaefe
- Department of Medical Biology, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
| | - Bulent O. Yildiz
- Department of Internal Medicine, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
- Endocrinology and Metabolism Unit, Faculty of Medicine, Hacettepe University, Hacettepe, 06100 Ankara, Turkey
- *Bulent O. Yildiz:
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Jones MR, Chua A, Chen YDI, Li X, Krauss RM, Rotter JI, Legro RS, Azziz R, Goodarzi MO. Harnessing expression data to identify novel candidate genes in polycystic ovary syndrome. PLoS One 2011; 6:e20120. [PMID: 21611153 PMCID: PMC3096662 DOI: 10.1371/journal.pone.0020120] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2011] [Accepted: 04/13/2011] [Indexed: 11/22/2022] Open
Abstract
Novel pathways in polycystic ovary syndrome (PCOS) are being identified in gene expression studies in PCOS tissues; such pathways may contain key genes in disease etiology. Previous expression studies identified both dickkopf homolog 1 (DKK1) and DnaJ (Hsp40) homolog, subfamily B, member 1 (DNAJB1) as differentially expressed in PCOS tissue, implicating them as candidates for PCOS susceptibility. To test this, we genotyped a discovery cohort of 335 PCOS cases and 198 healthy controls for three DKK1 single nucleotide polymorphisms (SNPs) and four DNAJB1 SNPs and a replication cohort of 396 PCOS cases and 306 healthy controls for 1 DKK1 SNP and 1 DNAJB1 SNP. SNPs and haplotypes were determined and tested for association with PCOS and component phenotypes. We found that no single nucleotide polymorphisms were associated with PCOS risk; however, the major allele of rs1569198 from DKK1 was associated with increased total testosterone (discovery cohort P = 0.0035) and dehydroepiandrosterone sulfate (replication cohort P = 0.05). Minor allele carriers at rs3962158 from DNAJB1 had increased fasting insulin (discovery cohort P = 0.003), increased HOMA-IR (discovery cohort P = 0.006; replication cohort P = 0.036), and increased HOMA-%B (discovery cohort P = 0.004). Carriers of haplotype 2 at DNAJB1 also had increased fasting insulin, HOMA-IR, and HOMA-%B. These findings suggest that genetic variation in DKK1 and DNAJB1 may have a role in the hyperandrogenic and metabolic dysfunction of PCOS, respectively. Our results also demonstrate the utility of gene expression data as a source of novel candidate genes in PCOS, a complex and still incompletely defined disease, for which alternative methods of gene identification are needed.
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Affiliation(s)
- Michelle R. Jones
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Angela Chua
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Yii-Der I. Chen
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Xiaohui Li
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
| | - Ronald M. Krauss
- Children's Hospital Oakland Research Institute, Oakland, California, United States of America
| | - Jerome I. Rotter
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
| | - Richard S. Legro
- Department of Obstetrics and Gynecology, Pennsylvania State College of Medicine, Hershey, Pennsylvania, United States of America
| | - Ricardo Azziz
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
- Department of Obstetrics and Gynecology, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
| | - Mark O. Goodarzi
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Department of Obstetrics and Gynecology, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Medical Genetics Institute, Cedars-Sinai Medical Center, Los Angeles, California, United States of America
- Department of Medicine, David Geffen School of Medicine, University of California Los Angeles, Los Angeles, California, United States of America
- * E-mail:
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82
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Grado-Ahuir JA, Aad PY, Spicer LJ. New insights into the pathogenesis of cystic follicles in cattle: microarray analysis of gene expression in granulosa cells. J Anim Sci 2011; 89:1769-86. [PMID: 21239663 DOI: 10.2527/jas.2010-3463] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023] Open
Abstract
Ovarian follicular growth and development are regulated by extraovarian and intraovarian factors, which influence granulosa cell proliferation and differentiation. However, the molecular mechanisms that drive follicular growth are not completely understood. Ovarian follicular cysts are one of the most common causes of reproductive failure in dairy cattle. Nevertheless, the primary cause of cyst formation has not been clearly established. A gene expression comparison may aid in elucidating the causes of ovarian cyst disease. Our objective was to identify differentially expressed genes in ovarian granulosa cells between normal dominant and cystic follicles of cattle. Granulosa cells and follicular fluid were isolated from dominant and cystic follicles collected via either ultrasound-guided aspiration from dairy cows (n = 24) or slaughterhouse ovaries from beef cows (n = 23). Hormonal analysis for progesterone, estradiol, and androstenedione in follicular fluid was performed by RIA. Total RNA was extracted and hybridized to 6 Affymetrix GeneChip Bovine Genome Arrays (Affymetrix, Santa Clara, CA). Abundance of mRNA for differentially expressed selected genes was determined through quantitative real-time reverse-transcription PCR. Follicular cysts showed greater (P < 0.05) progesterone, lesser (P < 0.05) estradiol, and no differences (P > 0.10) in androstenedione concentrations compared with noncystic follicles. A total of 163 gene sequences were differentially expressed (P < 0.01), with 19 upregulated and 144 downregulated. From selected target genes, quantitative real-time reverse-transcription PCR confirmed angiogenin, PGE(2) receptor 4, and G-protein coupled receptor 34 genes as upregulated in cystic follicles, and Indian hedgehog protein precursor and secreted frizzled-related protein 4 genes as downregulated in cystic follicles. Further research is required to elucidate the role of these factors in follicular development and cyst formation.
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Affiliation(s)
- J A Grado-Ahuir
- Department of Animal Science, Oklahoma State University, Stillwater 74078, USA
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83
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Kitaya K, Yamada H. Pathophysiological roles of chemokines in human reproduction: an overview. Am J Reprod Immunol 2010; 65:449-59. [PMID: 21087337 DOI: 10.1111/j.1600-0897.2010.00928.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Chemokines are a group of small cytokines that have an ability to induce leukocyte migration. Chemokines exert their functions by binding and activating specific G protein-coupled receptors. Studies have unveiled pleiotropic bioactivities of chemokines in various phenomena ranging from immunomodulation, embryogenesis, and homeostasis to pathogenesis. In the mammalian reproductive system, chemokines unexceptionally serve in multimodal events that are closely associated with establishment, maintenance, and deterioration of fecundity. The aim of this review is to update the knowledge on chemokines in male and female genital organs, with a focus on their potential pathophysiological roles in human reproduction.
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Affiliation(s)
- Kotaro Kitaya
- Department of Obstetrics and Gynecology, Graduate School of Medical Science, Kyoto Prefectural University of Medicine, Kamigyo-ku, Kyoto, Japan.
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84
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Yung Y, Maman E, Konopnicki S, Cohen B, Brengauz M, Lojkin I, Dal Canto M, Fadini R, Dor J, Hourvitz A. ADAMTS-1: a new human ovulatory gene and a cumulus marker for fertilization capacity. Mol Cell Endocrinol 2010; 328:104-8. [PMID: 20655981 DOI: 10.1016/j.mce.2010.07.019] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2010] [Revised: 06/21/2010] [Accepted: 07/19/2010] [Indexed: 11/17/2022]
Abstract
ADAM-metallopeptidase with thrombospondin type 1 motifs-1 (ADAMTS-1) null female mice show impaired follicular development and ovulatory processes. However, ADAMTS-1 expression and function in human normal ovulation and folliculogenesis have not yet been determined. The objective of this study is to study the expression patterns of ADAMTS-1 in human granulosa cells (GCs) obtained from follicles aspirated during in vitro maturation (IVM) and in vitro fertilization (IVF) procedures. We found that ADAMTS-1 expression is a luteinizing hormone/human chorionic gonadotropin (LH/hCG)-induced gene whose expression in the mural GCs directly correlated with antral follicular growth. Interestingly, we were able to show a significant correlation between ADAMTS-1 expression in cumulus cells and the fertilization capacity of the related oocyte. In conclusion, human ADAMTS-1 is an ovulatory gene and its expression is LH/hCG- and follicle-size dependent. The correlation between its expression in cumulus GCs and oocyte fertilization capacity suggests a role for ADAMTS-1 in human cumulus function.
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Affiliation(s)
- Yuval Yung
- 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.
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85
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Blastocysts from patients with polycystic ovaries exhibit altered transcriptome and secretome. Reprod Biomed Online 2010; 21:520-6. [DOI: 10.1016/j.rbmo.2010.05.010] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2010] [Revised: 05/11/2010] [Accepted: 05/12/2010] [Indexed: 12/25/2022]
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Patel SS, Beshay VE, Escobar JC, Carr BR. 17α-Hydroxylase (CYP17) expression and subsequent androstenedione production in the human ovary. Reprod Sci 2010; 17:978-86. [PMID: 20720262 DOI: 10.1177/1933719110379055] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
Traditionally, in women, only the theca cells in the ovary and the zona reticularis layer of the adrenal cortex are believed to synthesize androgens. Interestingly, their neighboring cell layers, the granulosa cells and the zona glomerulosa cells, respectively, do not produce androgens. Recent literature has highlighted the role of the activator protein (AP-1) transcription factor, c-Fos, in the dynamics of this structural and functional relationship. Differential expression of c-Fos is believed to result in distinct patterns of steroidogenesis among these compartments in both the ovary and the adrenal glands. Clinically, deficient c-Fos levels have been implicated in the pathogenesis of polycystic ovary syndrome (PCOS). In this review, we discuss the pivotal role of c-Fos in controlling the expression of CYP17 and hence androgen production in various organ systems throughout the human body.
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Affiliation(s)
- Satin S Patel
- Division of Reproductive Endocrinology and Infertility, University of Texas at Southwestern Medical Center, Dallas, TX 75390, USA.
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87
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Assou S, Boumela I, Haouzi D, Anahory T, Dechaud H, De Vos J, Hamamah S. Dynamic changes in gene expression during human early embryo development: from fundamental aspects to clinical applications. Hum Reprod Update 2010; 17:272-90. [PMID: 20716614 DOI: 10.1093/humupd/dmq036] [Citation(s) in RCA: 79] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The first week of human embryonic development comprises a series of events that change highly specialized germ cells into undifferentiated human embryonic stem cells (hESCs) that display an extraordinarily broad developmental potential. The understanding of these events is crucial to the improvement of the success rate of in vitro fertilization. With the emergence of new technologies such as Omics, the gene expression profiling of human oocytes, embryos and hESCs has been performed and generated a flood of data related to the molecular signature of early embryo development. METHODS In order to understand the complex genetic network that controls the first week of embryo development, we performed a systematic review and study of this issue. We performed a literature search using PubMed and EMBASE to identify all relevant studies published as original articles in English up to March 2010 (n = 165). We also analyzed the transcriptome of human oocytes, embryos and hESCs. RESULTS Distinct sets of genes were revealed by comparing the expression profiles of oocytes, embryos on Day 3 and hESCs, which are associated with totipotency, pluripotency and reprogramming properties, respectively. Known components of two signaling pathways (WNT and transforming growth factor-β) were linked to oocyte maturation and early embryonic development. CONCLUSIONS Omics analysis provides tools for understanding the molecular mechanisms and signaling pathways controlling early embryonic development. Furthermore, we discuss the clinical relevance of using a non-invasive molecular approach to embryo selection for the single-embryo transfer program.
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Affiliation(s)
- Said Assou
- CHU Montpellier, Institute for Research in Biotherapy, Hôpital Saint-Eloi, INSERM U847, Montpellier, France
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89
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The unappreciated Wnt-4 gene. J Pediatr Adolesc Gynecol 2010; 23:187-91. [PMID: 20060343 DOI: 10.1016/j.jpag.2009.10.001] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2009] [Revised: 09/30/2009] [Accepted: 10/01/2009] [Indexed: 01/13/2023]
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90
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Liu JJ, Ma X, Cai LB, Cui YG, Liu JY. Downregulation of both gene expression and activity of Hsp27 improved maturation of mouse oocyte in vitro. Reprod Biol Endocrinol 2010; 8:47. [PMID: 20465849 PMCID: PMC2890611 DOI: 10.1186/1477-7827-8-47] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2010] [Accepted: 05/14/2010] [Indexed: 02/01/2023] Open
Abstract
BACKGROUND Heat shock protein 27 (Hsp27), a member of the small heat shock protein family, is an apoptosis regulator. Our previous proteomic study showed that Hsp27 mainly expressed in human oocyte, and that Hsp27 expression was downregulated in the ovaries derived from women with the polycystic ovary syndrome (PCOS), a well known endocrinal disorder with abnormal apoptotic activity and folliculogenesis. However, the exact effects of Hsp27 downregulation on oocyte development have not yet been clarified. METHODS The expression of Hsp27 gene was downregulated in the mouse oocytes cultured in vitro using siRNA adenovirus infection, while the activity of Hsp27 was decreased by microinjection of polyclonal Hsp27 antibody into the cytoplasm of germinal vesicle (GV) oocytes. Oocyte maturation rate was evaluated by morphological observation. Early stage of apoptosis was determined using Annexin-V staining analysis and some critical apoptotic factors and cytokines were also monitored at both mRNA level by real time RT-PCR and protein expression level by immunofluorescence and western blot. RESULTS Hsp27 expressed at high level in maturing oocytes. Infection with AdshHsp27, and microinjection of Hsp27 antibody into GV oocytes, resulted in the improved oocyte development and maturation. Germinal vesicle breakdown (GVBD) rates were significantly increased in two AdshHsp27-treated groups (88.7%, 86.0%) and Hsp27 antibody-injected group (77.0%) when compared with control (76.2% in AdGFP, 64.4% in IgG-injected), respectively. In addition, the rates of metaphase II (MII) development in two AdshHsp27-treated groups (73.8%, 76.4%) and Hsp27 antibody-injected group (67.3%) were higher than that in the controls (59.6% in AdGFP, 55.1% in IgG-injected). We also found that the rates of early stage of apoptosis in Hsp27 downregulated groups (46.5% and 45.6%) were higher than that in control group (34.1%) after 8 h of IVM. Similarly, downregulation of Hsp27 caused a significantly enhanced the expression of apoptotic factors (caspase 8, caspase 3) and cytokines (bmp 15 and gdf 9). CONCLUSIONS Downregulation of Hsp27 improved the maturation of mouse oocytes, while increased early stage of apoptosis in oocytes by inducing the activation of extrinsic, caspase 8-mediated pathway.
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Affiliation(s)
- Jin-Juan Liu
- Department of life science and technology, China Pharmaceutical University, Nanjing 210038, China
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Xiang Ma
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Ling-Bo Cai
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Yu-Gui Cui
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
| | - Jia-Yin Liu
- Department of life science and technology, China Pharmaceutical University, Nanjing 210038, China
- Center of Clinical Reproductive Medicine, First Affiliated Hospital, Nanjing Medical University, Nanjing, 210029, China
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91
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San-Millán JL, Escobar-Morreale HF. The role of genetic variation in peroxisome proliferator-activated receptors in the polycystic ovary syndrome (PCOS): an original case-control study followed by systematic review and meta-analysis of existing evidence. Clin Endocrinol (Oxf) 2010; 72:383-92. [PMID: 19681917 DOI: 10.1111/j.1365-2265.2009.03679.x] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
OBJECTIVE To study the association of polymorphisms in the genes encoding peroxisome proliferator-activated receptors (PPARs) with the polycystic ovary syndrome (PCOS). DESIGN Case-control study and meta-analysis of published evidence. PATIENTS One hundred and sixty-one polycystic ovary syndrome patients and 113 non-hyperandrogenic women. MEASUREMENTS Genotyping for PPAR-gamma coactivator-1 gene (PPARGC1A) Gly482Ser, PPAR-alpha Leu162Val, PPAR-delta rs2267668A/G, PPAR-delta-87T/C, PPAR-gamma2 Pro12Ala and PPAR-gamma2 -681C/G variants and systematic review of the literature using the Entrez-PubMed search engine, followed by meta-analysis whenever possible. RESULTS Polycystic ovary syndrome patients carried the Gly482Ser variant in PPARGC1A more frequently than controls (72%vs. 58%, chi(2 )=( )5.54 P = 0.019), whereas carriers of the PPAR-alpha Leu162Val, PPAR-delta rs2267668A/G, PPAR-delta-87T/C, PPAR-gamma2 Pro12Ala and PPAR-gamma2 -681C/G variants were distributed similarly among both groups. The interaction between the PPARGC1A Gly482Ser and PPAR-delta-87T/C variants was also associated with PCOS (OR = 1.24, 95% CI 1.05-1.50, P = 0.008). The systematic review identified 31 studies addressing associations between PPARs variants and PCOS; meta-analysis was possible for nine studies focusing on the PPAR-gamma2 Pro12Ala variant. Although the individual studies did not reveal any statistically significant association, meta-analysis uncovered that carrying the PPAR-gamma2 Pro12Ala variant was associated with a reduced probability of having PCOS (OR = 0.77, 95% CI 0.61-0.96, P = 0.025), and that this association may be mediated by an effect on insulin sensitivity. CONCLUSIONS Common polymorphisms in the PPARGC1A, PPAR-delta and PPAR-gamma2 loci are associated with PCOS.
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Affiliation(s)
- José L San-Millán
- Department of Molecular Genetics, Hospital Universitario Ramon y Cajal & Universidad de Alcala, Madrid, Spain
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92
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Mohamed-Hussein ZA, Harun S. Construction of a polycystic ovarian syndrome (PCOS) pathway based on the interactions of PCOS-related proteins retrieved from bibliomic data. Theor Biol Med Model 2009; 6:18. [PMID: 19723303 PMCID: PMC2743649 DOI: 10.1186/1742-4682-6-18] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/14/2009] [Accepted: 09/01/2009] [Indexed: 12/15/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is a complex but frequently occurring endocrine abnormality. PCOS has become one of the leading causes of oligo-ovulatory infertility among premenopausal women. The definition of PCOS remains unclear because of the heterogeneity of this abnormality, but it is associated with insulin resistance, hyperandrogenism, obesity and dyslipidaemia. The main purpose of this study was to identify possible candidate genes involved in PCOS. Several genomic approaches, including linkage analysis and microarray analysis, have been used to look for candidate PCOS genes. To obtain a clearer view of the mechanism of PCOS, we have compiled data from microarray analyses. An extensive literature search identified seven published microarray analyses that utilized PCOS samples. These were published between the year of 2003 and 2007 and included analyses of ovary tissues as well as whole ovaries and theca cells. Although somewhat different methods were used, all the studies employed cDNA microarrays to compare the gene expression patterns of PCOS patients with those of healthy controls. These analyses identified more than a thousand genes whose expression was altered in PCOS patients. Most of the genes were found to be involved in gene and protein expression, cell signaling and metabolism. We have classified all of the 1081 identified genes as coding for either known or unknown proteins. Cytoscape 2.6.1 was used to build a network of protein and then to analyze it. This protein network consists of 504 protein nodes and 1408 interactions among those proteins. One hypothetical protein in the PCOS network was postulated to be involved in the cell cycle. BiNGO was used to identify the three main ontologies in the protein network: molecular functions, biological processes and cellular components. This gene ontology analysis identified a number of ontologies and genes likely to be involved in the complex mechanism of PCOS. These include the insulin receptor signaling pathway, steroid biosynthesis, and the regulation of gonadotropin secretion among others.
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Affiliation(s)
- Zeti-Azura Mohamed-Hussein
- School of Biosciences and Biotechnology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600, UKM Bangi, Selangor, Malaysia.
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93
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Victor VM, Rocha M, Bañuls C, Sanchez-Serrano M, Sola E, Gomez M, Hernandez-Mijares A. Mitochondrial complex I impairment in leukocytes from polycystic ovary syndrome patients with insulin resistance. J Clin Endocrinol Metab 2009; 94:3505-12. [PMID: 19567514 DOI: 10.1210/jc.2009-0466] [Citation(s) in RCA: 76] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
Abstract
CONTEXT Insulin resistance is a feature of polycystic ovary syndrome (PCOS) and is related to mitochondrial function. OBJECTIVE Our objective was to assess mitochondrial function by evaluating mitochondrial oxygen (O(2)) consumption, reactive oxygen species (ROS) production, levels of glutathione (GSH), the oxidized glutathione/GSH ratio, TNFalpha levels, and membrane potential. Additionally, we have evaluated mitochondrial complex I as a target of the oxidative stress responsible for PCOS in polymorphonuclear cells. DESIGN AND SETTING This was a prospective controlled study conducted in an academic medical center. PATIENTS The study population consisted of 20 lean reproductive-age women with PCOS and 20 body composition-matched controls. MAIN OUTCOME MEASURES We evaluated mitochondrial O(2) consumption using the Clark-type O(2) electrode; levels of ROS, GSH, and membrane potential by means of fluorescence microscopy; TNFalpha levels by ELISA; and complex I activity by spectrophotometric assay. RESULTS An impairment in mitochondrial function was observed in PCOS patients, evident by a decrease in mitochondrial O(2) consumption; an increase in ROS production, oxidized glutathione/GSH ratio, and TNFalpha levels; a drop in GSH levels; and an undermining of membrane potential. Furthermore, an impairment of mitochondrial complex I was identified. CONCLUSION This study supports the hypothesis of an association between insulin resistance and an impaired mitochondrial oxidative metabolism. We also propose that the oxidative stress responsible for PCOS takes place at complex I. These abnormalities may contribute to the increased risk of type 2 diabetes among women with PCOS.
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Affiliation(s)
- Victor M Victor
- University Hospital Doctor Peset Foundation, Avda Gaspar Aguilar 90, 46017 Valencia, Spain.
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94
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Dissen GA, Garcia-Rudaz C, Paredes A, Mayer C, Mayerhofer A, Ojeda SR. Excessive ovarian production of nerve growth factor facilitates development of cystic ovarian morphology in mice and is a feature of polycystic ovarian syndrome in humans. Endocrinology 2009; 150:2906-14. [PMID: 19264868 PMCID: PMC2689806 DOI: 10.1210/en.2008-1575] [Citation(s) in RCA: 78] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Although ovarian nerve growth factor (NGF) facilitates follicular development and ovulation, an excess of the neurotrophin in the rodent ovary reduces ovulatory capacity and causes development of precystic follicles. Here we show that ovarian NGF production is enhanced in patients with polycystic ovarian syndrome (PCOS) and that transgenically driven overproduction of NGF targeted to the ovary results in cystic morphology, when accompanied by elevated LH levels. NGF levels are increased in the follicular fluid from PCOS ovaries and in the culture medium of granulosa cells from PCOS patients, as compared with non-PCOS patients. Ovaries from transgenic mice carrying the NGF gene targeted to thecal-interstitial cells by the 17alpha-hydroxylase gene promoter produce more NGF than wild-type (WT) ovaries and are hyperinnervated by sympathetic nerves. Antral follicle growth is arrested resulting in accumulation of intermediate size follicles, many of which are apoptotic. Peripubertal transgenic mice respond to a gonadotropin challenge with a greater increase in plasma 17-hydroxyprogesterone, estradiol, and testosterone levels than WT controls. Transgenic mice also exhibit a reduced ovulatory response, delayed puberty, and reduced fertility, as assessed by a prolonged interval between litters, and a reduced number of pups per litter. Sustained, but mild, elevation of plasma LH levels results in a heightened incidence of ovarian follicular cysts in transgenic mice as compared with WT controls. These results suggest that overproduction of ovarian NGF is a component of polycystic ovarian morphology in both humans and rodents and that a persistent elevation in plasma LH levels is required for the morphological abnormalities to appear.
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Affiliation(s)
- Gregory A Dissen
- Division of Neuroscience, Oregon National Primate Research Center, Beaverton, Oregon 97006-3448, USA.
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95
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Kim JY, Song H, Kim H, Kang HJ, Jun JH, Hong SR, Koong MK, Kim IS. Transcriptional profiling with a pathway-oriented analysis identifies dysregulated molecular phenotypes in the endometrium of patients with polycystic ovary syndrome. J Clin Endocrinol Metab 2009; 94:1416-26. [PMID: 19141577 PMCID: PMC2682468 DOI: 10.1210/jc.2008-1612] [Citation(s) in RCA: 52] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
CONTEXT Polycystic ovary syndrome (PCOS) is a common endocrine disorder characterized by chronic oligo/anovulation, hyperandrogenemia, infertility, and metabolic alterations related to insulin resistance. These abnormalities in PCOS may have complex effects on pathophysiology of the endometrium, contributing to infertility and endometrial disorders. OBJECTIVE The objective of this study was to examine dysregulated signaling pathways in the endometrium of patients with PCOS (PCOSE) by analyzing expression profiles with a pathway-oriented method. DESIGN Microarrays, RT-PCR, laser capture microdissection, and immunohistochemistry were performed with endometrial tissues. SETTING This study was performed at a university hospital laboratory. PATIENTS This study comprised 12 regularly cycling women and 12 PCOS patients. MAIN OUTCOME MEASURE Dysregulated signaling pathways in PCOSE were identified as a gene set. RESULTS Hierarchical clustering revealed distinct expression profiles for PCOSE and the endometrium of normal cycling women. Gene sets associated with androgen signaling were not enriched in PCOSE, although they affect ovarian physiology of PCOS patients. Several biological pathways including cell cycle, apoptosis, glycolysis, and integrin-Rho-cytoskeleton network were aberrantly down-regulated in PCOSE. Expression of genes constituting these gene sets enriched in normal cycling women was systemically down-regulated in PCOSE. Laser capture microdissection-coupled real-time RT-PCR and immunohistochemistry further demonstrated that cell proliferation in the stroma, but not the epithelium, is significantly reduced in PCOSE. CONCLUSIONS Systemic down-regulation of various signaling pathways in PCOSE with extremely prolonged proliferative phase provides insight into the abnormal phenotypes that reflect pathophysiology of PCOS in the endometrium, possibly leading to increased risks of endometrial disorders.
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Affiliation(s)
- Jin Yeong Kim
- Department of Obstetrics andGynecology, Cheil General Hospital and Women's Healthcare Center, Kwangdong University College of Medicine, Seoul, Korea
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96
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Legro RS, McAllister JM. Heirarchical clustering and beyond in PCOS endometrium: brave new world. J Clin Endocrinol Metab 2009; 94:1084-5. [PMID: 19349472 PMCID: PMC2682474 DOI: 10.1210/jc.2009-0326] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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97
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Ravel C, Lorenço D, Dessolle L, Mandelbaum J, McElreavey K, Darai E, Siffroi JP. Mutational analysis of the WNT gene family in women with Mayer-Rokitansky-Kuster-Hauser syndrome. Fertil Steril 2009; 91:1604-7. [DOI: 10.1016/j.fertnstert.2008.12.006] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2008] [Revised: 11/17/2008] [Accepted: 12/04/2008] [Indexed: 11/26/2022]
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98
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How to improve postgenomic knowledge discovery using imputation. EURASIP JOURNAL ON BIOINFORMATICS & SYSTEMS BIOLOGY 2009:717136. [PMID: 19223972 PMCID: PMC3171441 DOI: 10.1155/2009/717136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/28/2008] [Revised: 09/08/2008] [Accepted: 11/04/2008] [Indexed: 11/18/2022]
Abstract
While microarrays make it feasible to rapidly investigate many complex biological problems, their multistep fabrication has the proclivity for error at every stage. The standard tactic has been to either ignore or regard erroneous gene readings as missing values, though this assumption can exert a major influence upon postgenomic knowledge discovery methods like gene selection and gene regulatory network (GRN) reconstruction. This has been the catalyst for a raft of new flexible imputation algorithms including local least square impute and the recent heuristic collateral missing value imputation, which exploit the biological transactional behaviour of functionally correlated genes to afford accurate missing value estimation. This paper examines the influence of missing value imputation techniques upon postgenomic knowledge inference methods with results for various algorithms consistently corroborating that instead of ignoring missing values, recycling microarray data by flexible and robust imputation can provide substantial performance benefits for subsequent downstream procedures.
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99
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Kenigsberg S, Bentov Y, Chalifa-Caspi V, Potashnik G, Ofir R, Birk OS. Gene expression microarray profiles of cumulus cells in lean and overweight-obese polycystic ovary syndrome patients. Mol Hum Reprod 2009; 15:89-103. [PMID: 19141487 DOI: 10.1093/molehr/gan082] [Citation(s) in RCA: 90] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
The aim of this work was to study gene expression patterns of cultured cumulus cells from lean and overweight-obese polycystic ovary syndrome (PCOS) patients using genome-wide oligonucleotide microarray. The study included 25 patients undergoing in vitro fertilization and intra-cytoplasmic sperm injection: 12 diagnosed with PCOS and 13 matching controls. Each of the groups was subdivided into lean (body mass index (BMI) < 24) and overweight (BMI > 27) subgroups. The following comparisons of gene expression data were made: lean PCOS versus lean controls, lean PCOS versus overweight PCOS, all PCOS versus all controls, overweight PCOS versus overweight controls, overweight controls versus lean controls and all overweight versus all lean. The largest number of differentially expressed genes (DEGs), with fold change (FC) |FC| >or= 1.5 and P-value < 0.01, was found in the lean PCOS versus lean controls comparison (487) with most of these genes being down-regulated in PCOS. The second largest group of DEGs originated from the comparison of lean PCOS versus overweight PCOS (305). The other comparisons resulted in a much smaller number of DEGs (174, 109, 125 and 12, respectively). In the comparison of lean PCOS with lean controls, most DEGs were transcription factors and components of the extracellular matrix and two pathways, Wnt/beta-catenin and mitogen-activated protein kinase. When comparing overweight PCOS with overweight controls, most DEGs were of pathways related to insulin signaling, metabolism and energy production. The finding of unique gene expression patterns in cumulus cells from the two PCOS subtypes is in agreement with other studies that have found the two to be separate entities with potentially different pathophysiologies.
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Affiliation(s)
- Shlomit Kenigsberg
- The Morris Kahn Laboratory of Human Genetics, National Institute for Biotechnology in the Negev, Ben-Gurion University, Beer-Sheva, Israel
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100
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Sehgal MSB, Gondal I, Dooley LS, Coppel R. Ameliorative missing value imputation for robust biological knowledge inference. J Biomed Inform 2008; 41:499-514. [PMID: 18334307 DOI: 10.1016/j.jbi.2007.10.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2006] [Revised: 09/16/2007] [Accepted: 10/15/2007] [Indexed: 10/22/2022]
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