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Hui M, Hu S, Ye L, Zhang M, Jing X, Hong Y. PAK2/beta-catenin/c-Myc/PKM2 signal transduction suppresses ovarian granulosa cell apoptosis in polycystic ovary syndrome. Biochem Biophys Res Commun 2023; 677:54-62. [PMID: 37549602 DOI: 10.1016/j.bbrc.2023.08.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2023] [Revised: 07/26/2023] [Accepted: 08/01/2023] [Indexed: 08/09/2023]
Abstract
Polycystic ovary syndrome (PCOS) exhibits the highest morbidity among endocrine diseases in women ranging from age 18 to 44. However, its pathogenesis remains unclear. The imbalance between systemic and ovarian oxidative stress (OS) is a key characteristic of PCOS, and accumulating evidence indicates that the antioxidative protein nuclear factor erythroid-2-related factor 2 (Nrf2) is implicated in cell apoptosis and inflammation caused by OS. The activated kinase 2 (PAK2)/-catenin/c-Myc/pyruvate kinase M2 (PKM2) axis is a newly identified signaling pathway that may regulate Nrf2 expression and thereby influence OS. In this study, we sought to identify PAK2 expression and function in PCOS cells. PAK2 and downstream PKM2 expression in KGN cells and tissues were detected by microarray and qPCR. Cell viability was determined using CCK-8 and colony formation assays (CFAs). Apoptosis was examined by flow cytometry. qPCR and ELISA were used to examine cell inflammation. Oxidant and OS-related enzymes were examined by ELISA. We found that PAK2 and PKM2 expression levels were reduced in KGN cells and PCOS ovarian cortex tissues. PAK2 overexpression activated β-catenin/c-Myc/PKM2 while PAK2 silencing deactivated it. PAK2 overexpression was reduced, whereas PAK2 silencing promoted, KGN cell proliferation and colony formation. Cell apoptosis and inflammation were also induced by PAK2 overexpression but were alleviated by its silencing. Furthermore, increased peroxidation product levels decreased antioxidative protein activities, and deactivated antioxidative Nrf2/HO-1 pathway were detected in PAK2-overexpressing KGN cells, whereas these effects were counteracted in PAK2 silenced cells. Our data suggest that PAK2 and its associated β-catenin/c-Myc/PKM2 inhibited cell viability and induced apoptosis and inflammation by triggering OS by deactivating the Nrf2/HO-1 pathway, suggesting the potential of PAK2 as a therapeutic PCOS treatment target.
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Affiliation(s)
- Miao Hui
- Nanjing University of Chinese Medicine, Nanjing, 210000, China.
| | - Shuihan Hu
- Nanjing University of Chinese Medicine, Nanjing, 210000, China.
| | - Lingchai Ye
- Nanjing University of Chinese Medicine, Nanjing, 210000, China.
| | - Mingyue Zhang
- Nanjing University of Chinese Medicine, Nanjing, 210000, China.
| | - Xiaoqing Jing
- Nanjing University of Chinese Medicine, Nanjing, 210000, China.
| | - Yanli Hong
- Department of Reproductive Medicine, Affiliated Hospital of Nanjing University of Nanjing University of Chinese Medicine, Nanjing, 210000, China.
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2
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Mo J, Liu C, Li Z, Fan L, Wu S, Husain H, Zhong C, Zhang B. A bioinformatics analysis of potential cellular communication networks in non-alcoholic steatohepatitis and colorectal adenoma using scRNA-seq and bulk-seq. J Gastrointest Oncol 2023; 14:1770-1787. [PMID: 37720432 PMCID: PMC10502531 DOI: 10.21037/jgo-23-502] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/13/2023] [Accepted: 07/27/2023] [Indexed: 09/19/2023] Open
Abstract
Background Non-alcoholic fatty liver disease (NAFLD) is the global most common chronic liver disease. Non-alcoholic steatohepatitis (NASH), an inflammatory subtype of NAFLD, has been shown to significantly increase the risk of colorectal adenoma (CRA). Therefore, from the perspective of bioinformatics analysis, the potential mechanisms of NASH/NAFLD-CRA can be explored. Methods In this study, we screened the differentially expressed genes (DEGs) and core effect pathways between NASH and CRA by analyzing the single-cell data of CRA patients and the high-throughput sequencing data (GSE37364 and GSE89632) in the online database. We screened therapeutic targets and biomarkers through gene function classification, pathway enrichment analysis, and protein-protein interaction network analysis. In terms of single cell data, we screened the core effect pathway and specific signal pathway of cell communication through cell annotation and cell communication analyses. The purpose of the study was to find potential biomarkers, therapeutic targets, and related effect pathways of NASH-CRA. Results NASH-CRA comorbidities were concentrated in inflammatory regulation-related pathways, and the core genes of disease progression included IL1B, FOSL1, EGR1, MYC, PTGS2, and FOS. The results suggested the key pathway of NASH-CRA might be the WNT pathway. The main cell signal communication pathways included WNT2B - (FZD6 + LRP5) and WNT2B - (FZD6 + LRP6). The send-receive process occurred in embryonic stem cells. Conclusions The core genes of NASH-CRA (FOS, EGR1, MYC, PTGS2, FOSL1, and IL1B) may participate in inflammation and immune responses through up-regulation in the process of disease occurrence, interfering with the pathophysiological process of CRA and NASH. NASH-CRA produces cell signal communication in the WNT pathway sent by WNT2B and received by FZD6, LRP5, and LRP6 in embryonic stem cells. These findings may help formulate early diagnosis and treatment strategies for CRA in NAFLD/NASH patients, and further explore corresponding prognostic markers and potential approaches. The significance of scRNA-seq in exploring tumor heterogeneity lies in promoting our understanding of the expression program of tumor related genes in tumor development patterns. However, the biggest challenge is that this analysis may miss out on some biologically significant gene expression programs.
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Affiliation(s)
- Jiahao Mo
- The Second Clinical Medical College of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Chang Liu
- The Second Clinical Medical College of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Zhuolin Li
- The Second Clinical Medical College of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Longxiu Fan
- The Second Clinical Medical College of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Shaohua Wu
- The Second Clinical Medical College of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Hatim Husain
- Division of Hematology and Oncology, Moores Cancer Center, University of California, San Diego, La Jolla, CA, USA
| | - Cailing Zhong
- Department of Gastroenterology, the Second Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
| | - Beiping Zhang
- Department of Gastroenterology, the Second Affiliated Hospital of Guangzhou University of Traditional Chinese Medicine, Guangzhou, China
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3
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Saedi S, Panahi R, Orak N, Jafarzadeh Shirazi MR. Comparative Meta-analysis of Adipose Tissue Transcriptomics Data in PCOS Patients and Healthy Control Women. Reprod Sci 2022; 30:1823-1833. [DOI: 10.1007/s43032-022-01145-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Accepted: 12/05/2022] [Indexed: 12/14/2022]
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4
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Liu Y, Liu X, Zhou W, Zhang J, Wu J, Guo S, Jia S, Wang H, Li J, Tan Y. Integrated bioinformatics analysis reveals potential mechanisms associated with intestinal flora intervention in nonalcoholic fatty liver disease. Medicine (Baltimore) 2022; 101:e30184. [PMID: 36086766 PMCID: PMC10980383 DOI: 10.1097/md.0000000000030184] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Accepted: 07/07/2022] [Indexed: 11/27/2022] Open
Abstract
BACKGROUND Nonalcoholic fatty liver disease (NAFLD) is a common chronic liver disease that imposes a huge economic burden on global public health. And the gut-liver axis theory supports the therapeutic role of intestinal flora in the development and progression of NAFLD. To this end, we designed bioinformatics study on the relationship between intestinal flora disorder and NAFLD, to explore the possible molecular mechanism of intestinal flora interfering with NAFLD. METHODS Differentially expressed genes for NAFLD were obtained from the GEO database. And the disease genes for NAFLD and intestinal flora disorder were obtained from the disease databases. The protein-protein interaction network was established by string 11.0 database and visualized by Cytoscape 3.7.2 software. Cytoscape plug-in MCODE and cytoHubba were used to screen the potential genes of intestinal flora disorder and NAFLD, to obtain potential targets for intestinal flora to interfere in the occurrence and process of NAFLD. Enrichment analysis of potential targets was carried out using R 4.0.2 software. RESULTS The results showed that 7 targets might be the key genes for intestinal flora to interfere with NAFLD. CCL2, IL6, IL1B, and FOS are mainly related to the occurrence and development mechanism of NAFLD, while PTGS2, SPINK1, and C5AR1 are mainly related to the intervention of intestinal flora in the occurrence and development of NAFLD. The gene function is mainly reflected in basic biological processes, including the regulation of metabolic process, epithelial development, and immune influence. The pathway is mainly related to signal transduction, immune regulation, and physiological metabolism. The TNF signaling pathway, AGE-RAGE signaling pathway in diabetic activity, and NF-Kappa B signaling pathways are important pathways for intestinal flora to interfere with NAFLD. According to the analysis results, there is a certain correlation between intestinal flora disorder and NAFLD. CONCLUSION It is speculated that the mechanism by which intestinal flora may interfere with the occurrence and development of NAFLD is mainly related to inflammatory response and insulin resistance. Nevertheless, further research is needed to explore the specific molecular mechanisms.
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Affiliation(s)
- Yingying Liu
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Xinkui Liu
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Wei Zhou
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jingyuan Zhang
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jiarui Wu
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Siyu Guo
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Shanshan Jia
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Haojia Wang
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Jialin Li
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
| | - Yingying Tan
- Department of Clinical Chinese Pharmacy, School of Chinese Materia Medica, Beijing University of Chinese Medicine, Beijing, China
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Abedal-Majed MA, Springman SA, Sutton CM, Snider AP, Bell BE, Hart M, Kurz SG, Bergman J, Summers AF, McFee RM, Davis JS, Wood JR, Cupp AS. VEGFA165 can rescue excess steroid secretion, inflammatory markers, and follicle arrest in the ovarian cortex of High A4 cows†. Biol Reprod 2022; 106:118-131. [PMID: 34726240 PMCID: PMC9630404 DOI: 10.1093/biolre/ioab201] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
A population of cows with excess androstenedione (A4; High A4) in follicular fluid, with follicular arrest, granulosa cell dysfunction, and a 17% reduction in calving rate was previously identified. We hypothesized that excess A4 in the ovarian microenvironment caused the follicular arrest in High A4 cows and that vascular endothelial growth factor A would rescue the High A4 phenotype. In trial 1, prior to culture, High A4 ovarian cortex (n = 9) had greater numbers of early stage follicles (primordial) and fewer later-stage follicles compared to controls (n = 11). Culture for 7 days did not relieve this follicular arrest; instead, High A4 ovarian cortex had increased indicators of inflammation, anti-Mullerian hormone, and A4 secretion compared to controls. In trial 2, we tested if vascular endothelial growth factor A isoforms could rescue the High A4 phenotype. High A4 (n = 5) and control (n = 5) ovarian cortex was cultured with (1) PBS, (2) VEGFA165 (50 ng/mL), (3) VEGFA165B (50 ng/mL), or (4) VEGFA165 + VEGFA165B (50 ng/mL each) for 7 days. Follicular progression increased with VEGFA165 in High A4 cows with greater early primary, primary, and secondary follicles than controls. Similar to trial 1, High A4 ovarian cortex secreted greater concentrations of A4 and other steroids and had greater indicators of inflammation compared to controls. However, VEGFA165 rescued steroidogenesis, oxidative stress, and fibrosis. The VEGFA165 and VEGFA165b both reduced IL-13, INFα, and INFβ secretion in High A4 cows to control levels. Thus, VEGFA165 may be a potential therapeutic to restore the ovarian steroidogenic microenvironment and may promote folliculogenesis.
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Affiliation(s)
- Mohamed A Abedal-Majed
- Department of Animal Production, School of Agriculture, University of Jordan, Amman-Jordan, Jordan
| | - Shelby A Springman
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Courtney M Sutton
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Alexandria P Snider
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Brooke E Bell
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | | | - Scott G Kurz
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Jeff Bergman
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Adam F Summers
- Department of Animal and Range Sciences, New Mexico State University, Las Cruces, NM, USA
| | - Renee M McFee
- School of Veterinary and Biomedical Sciences, Veterinary Medicine and Biomedical Sciences Hall (VBS), University of Nebraska-Lincoln, Lincoln, NE, USA
| | - John S Davis
- Olson Center for Women’s Health, University of Nebraska Medical Center, Omaha, NE, USA
- VA Nebraska-Western Iowa Health Care System, Omaha, NE, USA
| | - Jennifer R Wood
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
| | - Andrea S Cupp
- Department of Animal Science, Animal Science Building, University of Nebraska-Lincoln, Lincoln, NE, USA
- VA Nebraska-Western Iowa Health Care System, Omaha, NE, USA
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Zhang X, You L, Zhang X, Wang F, Wang Y, Zhou J, Liu C, Qu F. Neurobehavioral alternations of the female offspring born to polycystic ovary syndrome model rats administered by Chinese herbal medicine. Chin Med 2021; 16:97. [PMID: 34600579 PMCID: PMC8487466 DOI: 10.1186/s13020-021-00512-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Accepted: 09/21/2021] [Indexed: 11/15/2022] Open
Abstract
Background Chinese herbal medicine (CHM) has significant effects that improve the reproductive functions of patients with polycystic ovary syndrome (PCOS). However, the intergenerational effects of CHM on offspring and the underlying mechanism of CHM remain unclear. This study aimed to explore the effects and the underlying mechanism of CHM, specifically the Bu-Shen-Tian-Jing formula (BSTJF), on model rats with polycystic ovary syndrome (PCOS) and the neurobehavioral alterations of female offspring born to PCOS rats administered BSTJF. Methods High-performance liquid chromatography-mass spectrometry (HPLC–MS) and network pharmacology analysis were performed to identify the active ingredients and potential targets of BSTJF. Moreover, PCOS model rats were used to validate the role of BSTJF in reproduction and progeny neural development and to confirm the network pharmacological targets. Results A total of 91 constituents were characterized from BSTJF. The 20 most significant KEGG pathways and the high-frequency genes of these pathways were predicted to be putative targets of these molecules. The rat experiment showed that the downregulation of FOS protein expression in the ovarian granulosa cells of the PCOS group was reversed by BSTJF. The target residence time of the 5-week-old female offspring of the BSTJF group was higher than that of the PCOS group in the water maze experiment. Compared to the PCOS group, the changes in dendritic spine density, ultrastructure of neurons and synapses, and Gabrb1 and Grin2b protein expression levels in the hippocampus of female offspring were partially reversed in the BSTJF group. Conclusions BSTJF can effectively improve ovarian follicle development in PCOS rats and has positive effects on pubertal neurobehavioral alterations in the female offspring of these rats by reversing dendritic spine density, the ultrastructure of neurons and synapses, and the Gabrb1 and Grin2b protein expression levels in the hippocampus. Supplementary Information The online version contains supplementary material available at 10.1186/s13020-021-00512-4.
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Affiliation(s)
- Xian Zhang
- Women's Hospital, School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006, China
| | - Lifang You
- First People's Hospital of Yuhang District, Hangzhou, 311103, Zhejiang, China
| | - Xiaohui Zhang
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Fangfang Wang
- Women's Hospital, School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006, China
| | - Yi Wang
- Pharmaceutical Informatics Institute, College of Pharmaceutical Sciences, Zhejiang University, Hangzhou, 310058, China
| | - Jue Zhou
- College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou, 310018, China
| | - Chang Liu
- The Second Clinical Medical College of Zhejiang, Chinese Medical University, Hangzhou, 310053, China
| | - Fan Qu
- Women's Hospital, School of Medicine, Zhejiang University, 1 Xueshi Road, Hangzhou, 310006, China.
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Wang L, Li H, Tang X, Yang Y, Xiang Y, Zhang H, Wang Y. Oxidized high-density lipoprotein enhances endocrine disorders and ovarian damage in rats. J Cell Mol Med 2021; 25:8115-8126. [PMID: 34346538 PMCID: PMC8419193 DOI: 10.1111/jcmm.16197] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 11/20/2020] [Accepted: 11/25/2020] [Indexed: 11/30/2022] Open
Abstract
Previous findings have highlighted the association between oxidized high‐density lipoprotein (ox‐HDL) and polycystic ovary syndrome (PCOS) development; however, the underlying mechanism remains unclear. Under such context, the present study aimed to investigate the mechanism underlying the involvement of ox‐HDL in PCOS in relation to the p65/micro‐RNA‐34a (miR‐34a)/FOS axis. PCOS rat models were established with the injection of dehydroepiandrosterone (6 mg/100 g body weight). Both PCOS‐modelled rats and granulosa cells (GCs) were received treatment with ox‐HDL in order to identify its role in PCOS. Next, apoptosis and viability of GCs were detected with the application of TdT‐mediated dUTP Nick‐End Labeling and flow cytometry and Cell counting kit‐8, respectively. A series of assays were performed to determine the interaction among ox‐HDL, p65, miR‐34a, FOS and nuclear factor‐κB (NF‐κB). The results revealed high expression of ox‐HDL in PCOS, and enhanced endocrine disorders and ovarian damage in rats. ox‐HDL promoted apoptosis of GCs and decreased its viability. ox‐HDL activated NF‐κB pathway and induced p65 phosphorylation to promote miR‐34a expression. miR‐34a targeted and inhibited FOS expression. In conclusion, our findings suggested that ox‐HDL promoted the activation of p65 and transcription of miR‐34a, which stimulated apoptosis of GCs and inhibited expression of FOS, resulting in the overall acceleration of PCOS development.
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Affiliation(s)
- Lu Wang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Hongjuan Li
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Xiaoke Tang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Yupei Yang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Yuancui Xiang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Hui Zhang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
| | - Yali Wang
- Department of Obstetrics and Gynecology, Zhengzhou Central Hospital Affiliated Hospital to Zhengzhou University, Zhengzhou, China
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Emami N, Moini A, Yaghmaei P, Akbarinejad V, Shahhoseini M, Alizadeh A. Differences in expression of genes related to steroidgenesis in abdominal subcutaneous adipose tissue of pregnant women with and without PCOS; a case control study. BMC Pregnancy Childbirth 2021; 21:490. [PMID: 34233642 PMCID: PMC8261994 DOI: 10.1186/s12884-021-03957-5] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2020] [Accepted: 06/15/2021] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND It was reported that steroid-related gene expressions in the adipose tissue (AT) of women differ between women affected with polycystic ovary syndrome (PCOS) and non-PCOS. Although association between PCOS in mother and offspring's health is a crucial issue, there are few studies focusing on AT of pregnant women suffering from PCOS. Our objectives were to determine the differences between mRNA expression levels of key steroid-converting enzymes in abdominal subcutaneous AT of pregnant women afflicted with PCOS and non-PCOS. METHODS Twelve pregnant women with PCOS (case) and thirty six non-PCOS pregnant women (control) (1:3 ratio; age- and BMI-matched) undergoing cesarean section were enrolled for the present study. Expressions of fifteen genes related to steriodogenesis in abdominal subcutaneous AT were investigated using quantitative real-time PCR. RESULTS No significant differences were detected with respect to age, BMI (prior pregnancy and at delivery day), gestational period and parity among pregnant women with PCOS and non-PCOS. Most of the sex steroid-converting genes except 17β-Hydroxysteroid dehydrogenases2 (17BHSD2), were highly expressed on the day of delivery in subcutaneous AT. Women with PCOS showed significantly higher mRNA levels of steroidgenic acute regulator (STAR; P < 0.001), cytochrome P450 monooxygenase (CYP11A1; P < 0.05), 17α-hydroxylase (CYP17A1; P < 0.05), and 11β-Hydroxysteroid dehydrogenase (11BHSD1 and 11BHSD2; P < 0.05). The expression of steroid 21-hydroxylase (CYP21) in non-PCOS was fourfold higher than those of women with PCOS (P < 0.001). There were no significant differences between relative expression of aromatase cytochrome P450 (CYP19A1), 3β-hydroxysteroid dehydrogenase (3BHSD1 and 3BHSD2), and 17BHSD family (1, 3, 5, 7, and 12) between the two groups. CONCLUSION The expression levels of genes related to sex steroids metabolism were similar to age-matched and BMI- matched pregnant non-PCOS and pregnant women with PCOS at delivery day. However, the alterations in gene expressions involved in glucocorticoids and mineralocorticoids metabolism were shown. It is necessary to point out that further studies regarding functional activity are required. More attention should be given to AT of pregnant women with PCOS that was previously ignored.
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Affiliation(s)
- Neda Emami
- Department of Biology, Faculty of Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Ashraf Moini
- Department of Endocrinology and Female Infertility, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.,Breast Disease Research Center (BDRC), Tehran University of Medical Sciences, Tehran, Iran.,Department of Gynecology and Obstetrics, Arash Women's Hospital, Tehran University of Medical Sciences, Tehran, Iran
| | - Parichehreh Yaghmaei
- Department of Biology, Faculty of Science, Science and Research Branch, Islamic Azad University, Tehran, Iran
| | - Vahid Akbarinejad
- Department of Theriogenology, Faculty of Veterinary Medicine, University of Tehran, Tehran, Iran
| | - Maryam Shahhoseini
- Reproductive Epidemiology Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran. .,Department of Genetics, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran. .,Department of Cell and Molecular Biology, School of Biology, College of Science, University of Tehran, Tehran, Iran.
| | - AliReza Alizadeh
- Department of Embryology, Reproductive Biomedicine Research Center, Royan Institute for Reproductive Biomedicine, ACECR, Tehran, Iran.
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McFee RM, Romereim SM, Snider AP, Summers AF, Pohlmeier WE, Kurz SG, Cushman RA, Davis JS, Wood JR, Cupp AS. A high-androgen microenvironment inhibits granulosa cell proliferation and alters cell identity. Mol Cell Endocrinol 2021; 531:111288. [PMID: 33905753 DOI: 10.1016/j.mce.2021.111288] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Revised: 04/17/2021] [Accepted: 04/19/2021] [Indexed: 12/31/2022]
Abstract
A naturally occurring bovine model with excess follicular fluid androstenedione (High A4), reduced fertility, and polycystic ovary syndrome (PCOS)-like characteristics has been identified. We hypothesized High A4 granulosa cells (GCs) would exhibit altered cell proliferation and/or steroidogenesis. Microarrays of Control and High A4 GCs combined with Ingenuity Pathway Analysis indicated that High A4 GCs had cell cycle inhibition and increased expression of microRNAs that inhibit cell cycle genes. Granulosa cell culture confirmed that A4 treatment decreased GC proliferation, increased anti-Müllerian hormone, and increased mRNA for CTNNBIP1. Increased CTNNBIP1 prevents CTNNB1 from interacting with members of the WNT signaling pathway thereby inhibiting the cell cycle. Expression of CYP17A1 was upregulated in High A4 GCs presumably due to reduced FOS mRNA expression compared to Control granulosa cells. Furthermore, comparisons of High A4 GC with thecal and luteal cell transcriptomes indicated an altered cellular identity and function contributing to a PCOS-like phenotype.
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Affiliation(s)
- Renee M McFee
- University of Nebraska-Lincoln, School of Veterinary Medicine and Biomedical Sciences, P.O. Box 830905, Lincoln, NE, 68583-0905, USA
| | - Sarah M Romereim
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA
| | - Alexandria P Snider
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA
| | - Adam F Summers
- New Mexico State University, Animal and Range Sciences, Knox Hall Room 202, MSC 3-I Las Cruces, NM 88003, USA
| | - William E Pohlmeier
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA
| | - Scott G Kurz
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA
| | - Robert A Cushman
- USDA, Agricultural Research Service, U.S. Meat Animal Research Center, P.O. Box 166, Clay Center, NE, 68933, USA
| | - John S Davis
- University of Nebraska Medical Center, Olson Center for Women's Health, 983255 Nebraska Medical Center, Omaha, NE, 68198-3255, USA; VA Nebraska-Western Iowa Health Care System, Omaha, NE, 68105, USA
| | - Jennifer R Wood
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA
| | - Andrea S Cupp
- University of Nebraska-Lincoln, Department of Animal Science, 3940 Fair Street, Lincoln, NE, 68583-0908, USA.
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Leung KL, Sanchita S, Pham CT, Davis BA, Okhovat M, Ding X, Dumesic P, Grogan TR, Williams KJ, Morselli M, Ma F, Carbone L, Li X, Pellegrini M, Dumesic DA, Chazenbalk GD. Dynamic changes in chromatin accessibility, altered adipogenic gene expression, and total versus de novo fatty acid synthesis in subcutaneous adipose stem cells of normal-weight polycystic ovary syndrome (PCOS) women during adipogenesis: evidence of cellular programming. Clin Epigenetics 2020; 12:181. [PMID: 33228780 PMCID: PMC7686698 DOI: 10.1186/s13148-020-00970-x] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2020] [Accepted: 11/05/2020] [Indexed: 12/11/2022] Open
Abstract
Background Normal-weight polycystic ovary syndrome (PCOS) women exhibit adipose resistance in vivo accompanied by enhanced subcutaneous (SC) abdominal adipose stem cell (ASC) development to adipocytes with accelerated lipid accumulation per cell in vitro. The present study examines chromatin accessibility, RNA expression and fatty acid (FA) synthesis during SC abdominal ASC differentiation into adipocytes in vitro of normal-weight PCOS versus age- and body mass index-matched normoandrogenic ovulatory (control) women to study epigenetic/genetic characteristics as well as functional alterations of PCOS and control ASCs during adipogenesis. Results SC abdominal ASCs from PCOS women versus controls exhibited dynamic chromatin accessibility during adipogenesis, from significantly less chromatin accessibility at day 0 to greater chromatin accessibility by day 12, with enrichment of binding motifs for transcription factors (TFs) of the AP-1 subfamily at days 0, 3, and 12. In PCOS versus control cells, expression of genes governing adipocyte differentiation (PPARγ, CEBPα, AGPAT2) and function (ADIPOQ, FABP4, LPL, PLIN1, SLC2A4) was increased two–sixfold at days 3, 7, and 12, while that involving Wnt signaling (FZD1, SFRP1, and WNT10B) was decreased. Differential gene expression in PCOS cells at these time points involved triacylglycerol synthesis, lipid oxidation, free fatty acid beta-oxidation, and oxidative phosphorylation of the TCA cycle, with TGFB1 as a significant upstream regulator. There was a broad correspondence between increased chromatin accessibility and increased RNA expression of those 12 genes involved in adipocyte differentiation and function, Wnt signaling, as well as genes involved in the triacylglycerol synthesis functional group at day 12 of adipogenesis. Total content and de novo synthesis of myristic (C14:0), palmitic (C16:0), palmitoleic (C16:1), and oleic (C18:1) acid increased from day 7 to day 12 in all cells, with total content and de novo synthesis of FAs significantly greater in PCOS than controls cells at day 12. Conclusions In normal-weight PCOS women, dynamic chromatin remodeling of SC abdominal ASCs during adipogenesis may enhance adipogenic gene expression as a programmed mechanism to promote greater fat storage.
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Affiliation(s)
- Karen L Leung
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Smriti Sanchita
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Catherine T Pham
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Brett A Davis
- Department of Medicine, Knight Cardiovascular Institute, Oregon Health and Sciences University, Portland, OR, 97239, USA
| | - Mariam Okhovat
- Department of Medicine, Knight Cardiovascular Institute, Oregon Health and Sciences University, Portland, OR, 97239, USA
| | - Xiangming Ding
- Technology Center for Genomics and Bioinformatics, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | | | - Tristan R Grogan
- Department of Medicine Statistics Core, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Kevin J Williams
- UCLA Lipidomics Lab, Department of Biological Chemistry, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Marco Morselli
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Feiyang Ma
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Lucia Carbone
- Department of Medicine, Knight Cardiovascular Institute, Oregon Health and Sciences University, Portland, OR, 97239, USA.,Department of Molecular and Medical Genetics, Oregon Health and Sciences University, Portland, OR, 97239, USA.,Department of Medical Information and Clinical Epidemiology, Oregon Health and Sciences University, Portland, OR, 97239, USA.,Division of Genetics, Oregon National Primate Research Center, Beaverton, OR, 97006, USA
| | - Xinmin Li
- Technology Center for Genomics and Bioinformatics, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Matteo Pellegrini
- Department of Molecular, Cell, and Developmental Biology, University of California Los Angeles, Los Angeles, CA, 90095, USA
| | - Daniel A Dumesic
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA
| | - Gregorio D Chazenbalk
- Department of Obstetrics and Gynecology, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095, USA.
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11
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Wang F, Xie N, Zhou J, Dai M, Zhang Q, Hardiman PJ, Qu F. Molecular mechanisms underlying altered neurobehavioural development of female offspring of mothers with polycystic ovary syndrome: FOS-mediated regulation of neurotrophins in placenta. EBioMedicine 2020; 60:102993. [PMID: 32949999 PMCID: PMC7501055 DOI: 10.1016/j.ebiom.2020.102993] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2020] [Revised: 07/31/2020] [Accepted: 08/24/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND This study explored the mechanisms underlying altered neurobehavioural development of female offspring born to mothers with polycystic ovary syndrome (PCOS). METHODS In total, 20 women with PCOS and 32 healthy women who underwent caesarean deliveries with a single female foetus were recruited. Infants were assessed with Dubowitz scoring. Swan71 cell line with stable FOS overexpression was used to verify the regulatory effects of FOS on brain-derived neurotrophic factor (BDNF) and nerve growth factor (NGF) expression. Learning and memory in female first-generation (F1) and second-generation (F2) offspring in a rat model of PCOS was tested using the Morris water maze at puberty and adulthood. Transcriptome analysis of pubertal hippocampi and hypothalami of female F1 offspring was conducted. FINDINGS Total score and behaviour subscales of Dubowitz scoring were significantly lower in female infants of women with PCOS. FOS and NGF protein levels were downregulated in placental villi of the PCOS group. FOS played a key role in BDNF inhibition and enhancing NGF in Swan71 cells. PCOS female F1 rats exhibited lower target crossing times during puberty when compared to controls. Transcriptome analysis revealed significant changes in hippocampal and hypothalamic neuronal pathways in female F1 rats at puberty. INTERPRETATION FOS regulation of neurotrophins in the placenta negatively affects neurobehavioural development of female offspring of PCOS mothers. FUNDING This study was funded by the National Key R&D Program of China (2018YFC1004900 to F.Q. and F.W.) and the National Natural Science Foundation of China (81874480 to F.Q.; 81873837 to F.W.).
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Affiliation(s)
- Fangfang Wang
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Ningning Xie
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Jue Zhou
- College of Food Science and Biotechnology, Zhejiang Gongshang University, Hangzhou 310018, China
| | - Minchen Dai
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Qing Zhang
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China
| | - Paul J Hardiman
- Institute for Women's Health, University College London, London NW3 2PF, United Kingdom
| | - Fan Qu
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou 310006, China; Institute for Women's Health, University College London, London NW3 2PF, United Kingdom.
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12
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Filippou P, Homburg R. Is foetal hyperexposure to androgens a cause of PCOS? Hum Reprod Update 2017; 23:421-432. [PMID: 28531286 DOI: 10.1093/humupd/dmx013] [Citation(s) in RCA: 97] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2016] [Accepted: 05/04/2017] [Indexed: 12/17/2022] Open
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is the most common endocrinopathy affecting reproductive-aged women. The pathophysiology of this syndrome is still not completely understood but recent evidence suggests that the intra-uterine environment may be a key factor in the pathogenesis of PCOS, in particular, hyperexposure of the foetus to androgens. High concentrations of maternal serum testosterone during pregnancy have been shown to influence behaviour during childhood, the prevalence of autism disorders and anti-Mullerian hormone (AMH) concentrations in adolescence. They are also thought to re-programme the female reproductive axis to induce the features of PCOS in later life: oligo/anovulation, polycystic ovaries, hyperandrogenism and insulin resistance (IR). Support for this developmental theory for the aetiology of PCOS is gathering momentum, following results from first animal studies and now human data, which lend credence to many aspects of this hypothesis. OBJECTIVE AND RATIONALE In this review the recent available evidence is presented to support the hypothesis that hyperandrogenic changes in the intra-uterine environment could play a major part in the aetiological basis of PCOS. SEARCH METHODS An extensive PubMED and MEDline database search was conducted. Relevant studies were identified using a combination of search terms: 'polycystic ovary syndrome', 'PCOS', 'aetiology', 'anti-Mullerian hormone', 'AMH', 'pathogenesis', 'kisspeptin', 'hyperandrogenism', 'insulin resistance', 'metabolic factors', 'placenta', 'developmental hypothesis', 'genetic and epigenetic origins'. OUTCOMES A total of 82 studies were finally included in this review. There is robust evidence that a hyperandrogenic intra-uterine environment 'programmes' the genes concerned with ovarian steroidogenesis, insulin metabolism, gonadotrophin secretion and ovarian follicle development resulting in the development of PCOS in adult life. WIDER IMPLICATIONS Once the evidence supporting this hypothesis has been expanded by additional studies, the door would be open to find innovative treatments and preventative measures for this very prevalent condition. Such measures could considerably ease the human and economic burden that PCOS creates.
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Affiliation(s)
- Panagiota Filippou
- Homerton Fertility Centre, Homerton University Hospital, London E9 6SR, UK
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13
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Rosenfield RL, Ehrmann DA. The Pathogenesis of Polycystic Ovary Syndrome (PCOS): The Hypothesis of PCOS as Functional Ovarian Hyperandrogenism Revisited. Endocr Rev 2016; 37:467-520. [PMID: 27459230 PMCID: PMC5045492 DOI: 10.1210/er.2015-1104] [Citation(s) in RCA: 714] [Impact Index Per Article: 89.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/17/2015] [Accepted: 07/20/2016] [Indexed: 02/06/2023]
Abstract
Polycystic ovary syndrome (PCOS) was hypothesized to result from functional ovarian hyperandrogenism (FOH) due to dysregulation of androgen secretion in 1989-1995. Subsequent studies have supported and amplified this hypothesis. When defined as otherwise unexplained hyperandrogenic oligoanovulation, two-thirds of PCOS cases have functionally typical FOH, characterized by 17-hydroxyprogesterone hyperresponsiveness to gonadotropin stimulation. Two-thirds of the remaining PCOS have FOH detectable by testosterone elevation after suppression of adrenal androgen production. About 3% of PCOS have a related isolated functional adrenal hyperandrogenism. The remaining PCOS cases are mild and lack evidence of steroid secretory abnormalities; most of these are obese, which we postulate to account for their atypical PCOS. Approximately half of normal women with polycystic ovarian morphology (PCOM) have subclinical FOH-related steroidogenic defects. Theca cells from polycystic ovaries of classic PCOS patients in long-term culture have an intrinsic steroidogenic dysregulation that can account for the steroidogenic abnormalities typical of FOH. These cells overexpress most steroidogenic enzymes, particularly cytochrome P450c17. Overexpression of a protein identified by genome-wide association screening, differentially expressed in normal and neoplastic development 1A.V2, in normal theca cells has reproduced this PCOS phenotype in vitro. A metabolic syndrome of obesity-related and/or intrinsic insulin resistance occurs in about half of PCOS patients, and the compensatory hyperinsulinism has tissue-selective effects, which include aggravation of hyperandrogenism. PCOS seems to arise as a complex trait that results from the interaction of diverse genetic and environmental factors. Heritable factors include PCOM, hyperandrogenemia, insulin resistance, and insulin secretory defects. Environmental factors include prenatal androgen exposure and poor fetal growth, whereas acquired obesity is a major postnatal factor. The variety of pathways involved and lack of a common thread attests to the multifactorial nature and heterogeneity of the syndrome. Further research into the fundamental basis of the disorder will be necessary to optimally correct androgen levels, ovulation, and metabolic homeostasis.
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Affiliation(s)
- Robert L Rosenfield
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, The University of Chicago Pritzker School of Medicine, Chicago, Illinois 60637
| | - David A Ehrmann
- Section of Adult and Pediatric Endocrinology, Diabetes, and Metabolism, The University of Chicago Pritzker School of Medicine, Chicago, Illinois 60637
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Epigenetic and Transcriptional Alterations in Human Adipose Tissue of Polycystic Ovary Syndrome. Sci Rep 2016; 6:22883. [PMID: 26975253 PMCID: PMC4791632 DOI: 10.1038/srep22883] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2015] [Accepted: 02/23/2016] [Indexed: 01/08/2023] Open
Abstract
Genetic and epigenetic factors may predispose women to polycystic ovary syndrome (PCOS), a common heritable disorder of unclear etiology. Here we investigated differences in genome-wide gene expression and DNA methylation in adipose tissue from 64 women with PCOS and 30 controls. In total, 1720 unique genes were differentially expressed (Q < 0.05). Six out of twenty selected genes with largest expression difference (CYP1B1, GPT), genes linked to PCOS (RAB5B) or type 2 diabetes (PPARG, SVEP1), and methylation (DMAP1) were replicated in a separate case-control study. In total, 63,213 sites (P < 0.05) and 440 sites (Q < 0.15) were differently methylated. Thirty differentially expressed genes had corresponding changes in 33 different DNA methylation sites. Moreover, a total number of 1913 pairs of differentially expressed “gene-CpG” probes were significantly correlated after correction for multiple testing and corresponded with 349 unique genes. In conclusion, we identified a large number of genes and pathways that are affected in adipose tissue from women with PCOS. We also identified specific DNA methylation pathways that may affect mRNA expression. Together, these novel findings show that women with PCOS have multiple transcriptional and epigenetic changes in adipose tissue that are relevant for development of the disease.
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15
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Li J, Papadopoulos V, Vihma V. Steroid biosynthesis in adipose tissue. Steroids 2015; 103:89-104. [PMID: 25846979 DOI: 10.1016/j.steroids.2015.03.016] [Citation(s) in RCA: 69] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2015] [Revised: 03/20/2015] [Accepted: 03/24/2015] [Indexed: 12/25/2022]
Abstract
Tissue-specific expression of steroidogenic enzymes allows the modulation of active steroid levels in a local manner. Thus, the measurement of local steroid concentrations, rather than the circulating levels, has been recognized as a more accurate indicator of the steroid action within a specific tissue. Adipose tissue, one of the largest endocrine tissues in the human body, has been established as an important site for steroid storage and metabolism. Locally produced steroids, through the enzymatic conversion from steroid precursors delivered to adipose tissue, have been proven to either functionally regulate adipose tissue metabolism, or quantitatively contribute to the whole body's steroid levels. Most recently, it has been suggested that adipose tissue may contain the steroidogenic machinery necessary for the initiation of steroid biosynthesis de novo from cholesterol. This review summarizes the evidence indicating the presence of the entire steroidogenic apparatus in adipose tissue and discusses the potential roles of local steroid products in modulating adipose tissue activity and other metabolic parameters.
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Affiliation(s)
- Jiehan Li
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada; Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada; Department of Medicine, McGill University, Montreal, Canada; Department of Biochemistry, McGill University, Montreal, Canada
| | - Vassilios Papadopoulos
- Research Institute of the McGill University Health Centre, McGill University, Montreal, Canada; Department of Pharmacology and Therapeutics, McGill University, Montreal, Canada; Department of Medicine, McGill University, Montreal, Canada; Department of Biochemistry, McGill University, Montreal, Canada.
| | - Veera Vihma
- Folkhälsan Research Center, Helsinki, Finland; University of Helsinki and Helsinki University Central Hospital, Heart and Lung Center, Helsinki, Finland.
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16
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Xu N, Geller DH, Jones MR, Funari VA, Azziz R, Goodarzi MO. Comprehensive assessment of expression of insulin signaling pathway components in subcutaneous adipose tissue of women with and without polycystic ovary syndrome. JOURNAL OF CLINICAL AND TRANSLATIONAL ENDOCRINOLOGY 2015; 2:99-104. [PMID: 26236647 PMCID: PMC4517435 DOI: 10.1016/j.jcte.2015.06.002] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Objective Insulin resistance is a common feature of polycystic ovary syndrome (PCOS). The insulin signaling pathway consists of two major pathways, the metabolic and the mitogenic cascades. The many components of these pathways have not been comprehensively analyzed for differential expression in insulin-responsive tissues in PCOS. The goal of this study was to determine whether the core elements of the insulin signal transduction cascade were differentially expressed in subcutaneous adipose tissue (SAT) between PCOS and controls. Materials/methods Quantitative real-time PCR for 36 insulin signaling pathway genes was performed in subcutaneous adipose tissue from 22 white PCOS and 13 healthy controls. Results Genes in the insulin signaling pathway were not differentially expressed in subcutaneous adipose tissue between PCOS and controls (P > 0.05 for all). Components mainly of the mitogenic pathway were correlated with both androgens and metabolic phenotypes. Expression levels of five genes (MKNK1, HRAS, NRAS, KRAS, and GSK3A) were positively correlated with total testosterone level (ρ > 0, P < 0.05). Inverse correlation was found between expression of six genes (HRAS, MAP2K2, NRAS, MAPK3, GRB2, and SHC1) and metabolic traits (body mass index, fasting glucose, fasting insulin, and HOMA-IR) (ρ < 0, P < 0.05). Conclusions Differential expression of core insulin signaling pathway components in subcutaneous adipose tissue is not a major contributor to the pathogenesis of PCOS. Correlation between clinical phenotypes and expression of several genes in the mitogenic limb of the insulin signaling pathway suggests mitogenic signaling by insulin may regulate steroidogenesis and glucose homeostasis. We examined gene expression in adipose tissue between PCOS and controls. Complete coverage of core elements of the insulin signaling pathway. Differential mRNA expression in adipose tissue is not a major contributor to PCOS. We discovered associations between mitogenic signaling components and phenotypes.
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Affiliation(s)
- Ning Xu
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
| | - David H Geller
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
| | - Michelle R Jones
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
| | - Vincent A Funari
- Department of Pediatrics, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
| | - Ricardo Azziz
- Departments of Obstetrics and Gynecology and Medicine, Georgia Regents University, Augusta, Georgia 30901 USA
| | - Mark O Goodarzi
- Division of Endocrinology, Diabetes and Metabolism, Department of Medicine, Cedars-Sinai Medical Center, Los Angeles, California 90048, USA
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Involvement of Visceral Adipose Tissue in Immunological Modulation of Inflammatory Cascade in Preeclampsia. Mediators Inflamm 2015; 2015:325932. [PMID: 26089598 PMCID: PMC4458290 DOI: 10.1155/2015/325932] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/12/2015] [Accepted: 04/04/2015] [Indexed: 01/12/2023] Open
Abstract
Objectives. The pathophysiology of preeclampsia is characterized by abnormal placentation, an exaggerated inflammatory response, and generalized dysfunction of the maternal endothelium. We investigated the effects of preeclampsia serum on the expression of inflammation-related genes by adipose tissue. Materials and Methods. Visceral adipose tissue was obtained from the omentum of patients with early ovarian cancer without metastasis. Adipose tissue was incubated with sera obtained from either five women affected with severe preeclampsia or five women from control pregnant women at 37°C in a humidified incubator at 5% CO2 for 24 hours. 370 genes in total mRNA were analyzed with quantitative RT-PCR (Inflammatory Response & Autoimmunity gene set). Results. Gene expression analysis revealed changes in the expression levels of 30 genes in adipose tissue treated with preeclampsia sera. Some genes are related to immune response, oxidative stress, insulin resistance, and adipogenesis, which plays a central role in excessive systemic inflammatory response of preeclampsia. In contrast, other genes have shown beneficial effects in the regulation of Th2 predominance, antioxidative stress, and insulin sensitivity. Conclusion. In conclusion, visceral adipose tissue offers protection against inflammation, oxidative insults, and other forms of cellular stress that are central to the pathogenesis of preeclampsia.
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A cell-autonomous molecular cascade initiated by AMP-activated protein kinase represses steroidogenesis. Mol Cell Biol 2014; 34:4257-71. [PMID: 25225331 DOI: 10.1128/mcb.00734-14] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Steroid hormones regulate essential physiological processes, and inadequate levels are associated with various pathological conditions. In testosterone-producing Leydig cells, steroidogenesis is strongly stimulated by luteinizing hormone (LH) via its receptor leading to increased cyclic AMP (cAMP) production and expression of the steroidogenic acute regulatory (STAR) protein, which is essential for the initiation of steroidogenesis. Steroidogenesis then passively decreases with the degradation of cAMP into AMP by phosphodiesterases. In this study, we show that AMP-activated protein kinase (AMPK) is activated following cAMP-to-AMP breakdown in MA-10 and MLTC-1 Leydig cells. Activated AMPK then actively inhibits cAMP-induced steroidogenesis by repressing the expression of key regulators of steroidogenesis, including Star and Nr4a1. Similar results were obtained in Y-1 adrenal cells and in the constitutively steroidogenic R2C cells. We have also determined that maximum AMPK activation following stimulation of steroidogenesis in MA-10 Leydig cells occurs when steroid hormone production has reached a plateau. Our data identify AMPK as a molecular rheostat that actively represses steroid hormone biosynthesis to preserve cellular energy homeostasis and prevent excess steroid production.
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González-Muniesa P, Marrades MP, Martínez JA, Moreno-Aliaga MJ. Differential proinflammatory and oxidative stress response and vulnerability to metabolic syndrome in habitual high-fat young male consumers putatively predisposed by their genetic background. Int J Mol Sci 2013; 14:17238-55. [PMID: 23975165 PMCID: PMC3794726 DOI: 10.3390/ijms140917238] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2013] [Revised: 08/12/2013] [Accepted: 08/13/2013] [Indexed: 12/18/2022] Open
Abstract
The current nutritional habits and lifestyles of modern societies favor energy overloads and a diminished physical activity, which may produce serious clinical disturbances and excessive weight gain. In order to investigate the mechanisms by which the environmental factors interact with molecular mechanisms in obesity, a pathway analysis was performed to identify genes differentially expressed in subcutaneous abdominal adipose tissue (SCAAT) from obese compared to lean male (21–35 year-old) subjects living in similar obesogenic conditions: habitual high fat dietary intake and moderate physical activity. Genes involved in inflammation (ALCAM, CTSB, C1S, YKL-40, MIF, SAA2), extracellular matrix remodeling (MMP9, PALLD), angiogenesis (EGFL6, leptin) and oxidative stress (AKR1C3, UCHL1, HSPB7 and NQO1) were upregulated; whereas apoptosis, signal transcription (CITED 2 and NR3C1), cell control and cell cycle-related genes were downregulated. Interestingly, the expression of some of these genes (C1S, SAA2, ALCAM, CTSB, YKL-40 and tenomodulin) was found to be associated with some relevant metabolic syndrome features. The obese group showed a general upregulation in the expression of inflammatory, oxidative stress, extracellular remodeling and angiogenic genes compared to lean subjects, suggesting that a given genetic background in an obesogenic environment could underlie the resistance to gaining weight and obesity-associated manifestations.
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Affiliation(s)
- Pedro González-Muniesa
- Department of Nutrition, Food Sciences and Physiology, University of Navarra, 31008 Pamplona, Spain; E-Mails: (P.G.-M.); (M.P.M.); (J.A.M.)
- CIBERobn Physiopathology of Obesity and Nutrition, Centre of Biomedical Research Network, 29029 Madrid, Spain
| | - María Pilar Marrades
- Department of Nutrition, Food Sciences and Physiology, University of Navarra, 31008 Pamplona, Spain; E-Mails: (P.G.-M.); (M.P.M.); (J.A.M.)
| | - José Alfredo Martínez
- Department of Nutrition, Food Sciences and Physiology, University of Navarra, 31008 Pamplona, Spain; E-Mails: (P.G.-M.); (M.P.M.); (J.A.M.)
- CIBERobn Physiopathology of Obesity and Nutrition, Centre of Biomedical Research Network, 29029 Madrid, Spain
| | - María Jesús Moreno-Aliaga
- Department of Nutrition, Food Sciences and Physiology, University of Navarra, 31008 Pamplona, Spain; E-Mails: (P.G.-M.); (M.P.M.); (J.A.M.)
- CIBERobn Physiopathology of Obesity and Nutrition, Centre of Biomedical Research Network, 29029 Madrid, Spain
- Author to whom correspondence should be addressed; E-Mail: ; Tel.: +34-948-425-600 (ext. 806558); Fax: +34-948-425-740
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