1
|
Bao S, Yin T, Liu S. Ovarian aging: energy metabolism of oocytes. J Ovarian Res 2024; 17:118. [PMID: 38822408 PMCID: PMC11141068 DOI: 10.1186/s13048-024-01427-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2023] [Accepted: 04/30/2024] [Indexed: 06/03/2024] Open
Abstract
In women who are getting older, the quantity and quality of their follicles or oocytes and decline. This is characterized by decreased ovarian reserve function (DOR), fewer remaining oocytes, and lower quality oocytes. As more women choose to delay childbirth, the decline in fertility associated with age has become a significant concern for modern women. The decline in oocyte quality is a key indicator of ovarian aging. Many studies suggest that age-related changes in oocyte energy metabolism may impact oocyte quality. Changes in oocyte energy metabolism affect adenosine 5'-triphosphate (ATP) production, but how related products and proteins influence oocyte quality remains largely unknown. This review focuses on oocyte metabolism in age-related ovarian aging and its potential impact on oocyte quality, as well as therapeutic strategies that may partially influence oocyte metabolism. This research aims to enhance our understanding of age-related changes in oocyte energy metabolism, and the identification of biomarkers and treatment methods.
Collapse
Affiliation(s)
- Shenglan Bao
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, China
| | - Tailang Yin
- Reproductive Medical Center, Renmin Hospital of Wuhan University, Wuhan, China.
| | - Su Liu
- Shenzhen Key Laboratory of Reproductive Immunology for Peri-Implantation, , Shenzhen Zhongshan Institute for Reproductive Medicine and Genetics, Shenzhen Zhongshan Obstetrics & Gynecology Hospital (Formerly Shenzhen Zhongshan Urology Hospital), Shenzhen, China.
| |
Collapse
|
2
|
Del Bianco D, Gentile R, Sallicandro L, Biagini A, Quellari PT, Gliozheni E, Sabbatini P, Ragonese F, Malvasi A, D’Amato A, Baldini GM, Trojano G, Tinelli A, Fioretti B. Electro-Metabolic Coupling of Cumulus-Oocyte Complex. Int J Mol Sci 2024; 25:5349. [PMID: 38791387 PMCID: PMC11120766 DOI: 10.3390/ijms25105349] [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: 03/30/2024] [Revised: 05/03/2024] [Accepted: 05/10/2024] [Indexed: 05/26/2024] Open
Abstract
Oocyte-cumulus cell interaction is essential for oocyte maturation and competence. The bidirectional crosstalk network mediated by gap junctions is fundamental for the metabolic cooperation between these cells. As cumulus cells exhibit a more glycolytic phenotype, they can provide metabolic substrates that the oocyte can use to produce ATP via oxidative phosphorylation. The impairment of mitochondrial activity plays a crucial role in ovarian aging and, thus, in fertility, determining the success or failure of assisted reproductive techniques. This review aims to deepen the knowledge about the electro-metabolic coupling of the cumulus-oocyte complex and to hypothesize a putative role of potassium channel modulators in order to improve fertility, promote intracellular Ca2+ influx, and increase the mitochondrial biogenesis and resulting ATP levels in cumulus cells.
Collapse
Affiliation(s)
- Diletta Del Bianco
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
| | - Rosaria Gentile
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Laboratorio Interdipartimentale di Fisiopatologia della Riproduzione, Università degli Studi di Perugia, Edificio C, Piano 3 P.zza Lucio Severi, 1, Sant’Andrea delle Fratte, 06132 Perugia, Italy
| | - Luana Sallicandro
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Department of Medicine and Surgery, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132 Perugia, Italy
| | - Andrea Biagini
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Department of Medicine and Surgery, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132 Perugia, Italy
| | - Paola Tiziana Quellari
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Department of Medicine and Surgery, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132 Perugia, Italy
- ASST Grande Ospedale Metropolitano Niguarda, 20162 Milano, Italy
| | - Elko Gliozheni
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Department of Medicine and Surgery, Perugia Medical School, University of Perugia, Piazza Lucio Severi 1, 06132 Perugia, Italy
- Department of Obstetrics and Gynecology, Faculty of Medicine, University of Tirana, AL1005 Tirana, Albania
| | - Paola Sabbatini
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
| | - Francesco Ragonese
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Laboratorio Interdipartimentale di Fisiopatologia della Riproduzione, Università degli Studi di Perugia, Edificio C, Piano 3 P.zza Lucio Severi, 1, Sant’Andrea delle Fratte, 06132 Perugia, Italy
| | - Antonio Malvasi
- Department of Biomedical Sciences and Human Oncology, University of Bari, 70121 Bari, Italy;
| | - Antonio D’Amato
- 1st Unit of Obstetrics and Gynecology, University of Bari, 70121 Bari, Italy;
| | | | - Giuseppe Trojano
- Department of Maternal and Child Health, “Madonna delle Grazie” Hospital ASM, 75100 Matera, Italy;
| | - Andrea Tinelli
- Department of Obstetrics and Gynecology and CERICSAL (CEntro di RIcerca Clinico SALentino), Veris delli Ponti Hospital, Via Giuseppina delli Ponti, 73020 Scorrano, Lecce, Italy
| | - Bernard Fioretti
- Department of Chemistry, Biology and Biotechnologies, University of Perugia, Via dell’Elce di Sotto 8, 06132 Perugia, Italy; (D.D.B.); (R.G.); (L.S.); (A.B.); (P.T.Q.); (E.G.); (P.S.); (F.R.)
- Laboratorio Interdipartimentale di Fisiopatologia della Riproduzione, Università degli Studi di Perugia, Edificio C, Piano 3 P.zza Lucio Severi, 1, Sant’Andrea delle Fratte, 06132 Perugia, Italy
| |
Collapse
|
3
|
Ju W, Zhao Y, Yu Y, Zhao S, Xiang S, Lian F. Mechanisms of mitochondrial dysfunction in ovarian aging and potential interventions. Front Endocrinol (Lausanne) 2024; 15:1361289. [PMID: 38694941 PMCID: PMC11061492 DOI: 10.3389/fendo.2024.1361289] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2023] [Accepted: 03/22/2024] [Indexed: 05/04/2024] Open
Abstract
Mitochondria plays an essential role in regulating cellular metabolic homeostasis, proliferation/differentiation, and cell death. Mitochondrial dysfunction is implicated in many age-related pathologies. Evidence supports that the dysfunction of mitochondria and the decline of mitochondrial DNA copy number negatively affect ovarian aging. However, the mechanism of ovarian aging is still unclear. Treatment methods, including antioxidant applications, mitochondrial transplantation, emerging biomaterials, and advanced technologies, are being used to improve mitochondrial function and restore oocyte quality. This article reviews key evidence and research updates on mitochondrial damage in the pathogenesis of ovarian aging, emphasizing that mitochondrial damage may accelerate and lead to cellular senescence and ovarian aging, as well as exploring potential methods for using mitochondrial mechanisms to slow down aging and improve oocyte quality.
Collapse
Affiliation(s)
- Wenhan Ju
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Yuewen Zhao
- CReATe Fertility Centre, Toronto, ON, Canada
| | - Yi Yu
- Department of Reproduction and Genetics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shuai Zhao
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Shan Xiang
- The First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan, China
| | - Fang Lian
- Department of Reproduction and Genetics, Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan, China
| |
Collapse
|
4
|
Zhang CH, Liu XY, Wang J. Essential Role of Granulosa Cell Glucose and Lipid Metabolism on Oocytes and the Potential Metabolic Imbalance in Polycystic Ovary Syndrome. Int J Mol Sci 2023; 24:16247. [PMID: 38003436 PMCID: PMC10671516 DOI: 10.3390/ijms242216247] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 11/06/2023] [Accepted: 11/11/2023] [Indexed: 11/26/2023] Open
Abstract
Granulosa cells are crucial for the establishment and maintenance of bidirectional communication among oocytes. Various intercellular material exchange modes, including paracrine and gap junction, are used between them to achieve the efficient delivery of granulosa cell structural components, energy substrates, and signaling molecules to oocytes. Glucose metabolism and lipid metabolism are two basic energy metabolism pathways in granulosa cells; these are involved in the normal development of oocytes. Pyruvate, produced by granulosa cell glycolysis, is an important energy substrate for oocyte development. Granulosa cells regulate changes in intrafollicular hormone levels through the processing of steroid hormones to control the development process of oocytes. This article reviews the material exchange between oocytes and granulosa cells and expounds the significance of granulosa cells in the development of oocytes through both glucose metabolism and lipid metabolism. In addition, we discuss the effects of glucose and lipid metabolism on oocytes under pathological conditions and explore its relationship to polycystic ovary syndrome (PCOS). A series of changes were found in the endogenous molecules and ncRNAs that are related to glucose and lipid metabolism in granulosa cells under PCOS conditions. These findings provide a new therapeutic target for patients with PCOS; additionally, there is potential for improving the fertility of patients with PCOS and the clinical outcomes of assisted reproduction.
Collapse
Affiliation(s)
- Chen-Hua Zhang
- Queen Mary School, Medical College, Nanchang University, Nanchang 330006, China; (C.-H.Z.); (X.-Y.L.)
| | - Xiang-Yi Liu
- Queen Mary School, Medical College, Nanchang University, Nanchang 330006, China; (C.-H.Z.); (X.-Y.L.)
| | - Jing Wang
- Department of Cell Biology, School of Medicine, Nanchang University, Nanchang 330006, China
| |
Collapse
|
5
|
Zou L, Li W, Xu D, Zhu S, Jiang B. Alteration of the N 6-methyladenosine methylation landscape in a mouse model of polycystic ovary syndrome. J Ovarian Res 2023; 16:157. [PMID: 37550765 PMCID: PMC10408202 DOI: 10.1186/s13048-023-01246-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2022] [Accepted: 07/21/2023] [Indexed: 08/09/2023] Open
Abstract
OBJECTIVE To explore the N6-methyladenosine (m6A) methylation abnormality of mRNAs and its potential roles in the mouse model of polycystic ovary syndrome (PCOS). METHODS The mouse model of PCOS were induced by injecting dehydroepiandrosterone (DHEA), and confirmed by observing the morphological structures of ovarian follicles. Subsequently, m6A-tagged mRNAs were identified via m6A epitranscriptomic microarray and its potential functional pathways were predicted in KEGG database. The expression and modification levels of key mRNAs in the most enriched pathway were evaluated and compared using western blot and methylated RNA immunoprecipitation-quantitative PCR (MeRIP-qPCR). RESULTS Compared with the control group, 415 hypermethylated and downregulated mRNAs, 8 hypomethylated and upregulated mRNAs, and 14 hypermethylated and upregulated mRNAs were identified in the PCOS group (Fold change ≥ 1.5). Those mRNAs were mainly involved in insulin signaling pathway, type II diabetes mellitus, Fc epsilon RI signaling pathway, inositol phosphate metabolism, and GnRH secretion. In insulin signaling pathway, the expression levels of phosphorylated protein kinase B (p-AKT) were decreased, whereas that of upstream phosphorylated phosphatidylinositol 3-kinase (p-PI3K) were increased in PCOS group. Moreover, skeletal muscle and kidney-enriched inositol polyphosphate 5-phosphatease (SKIP), one of PIP3 phosphatases, was verified to be overexpressed, and Skip mRNAs were hypermethylated in PCOS group. CONCLUSION The altered m6A modification of mRNAs might play a critical role in PCOS process. The PI3K/AKT pathway is inhibited in the mouse model of PCOS. Whether it is caused by the m6A modification of Skip mRNAs is worthy of further exploration.
Collapse
Affiliation(s)
- Lingxiao Zou
- Department of Obstetrics and Gynaecology, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, China
| | - Waixing Li
- Department of Obstetrics and Gynaecology, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, China
| | - Dabao Xu
- Department of Obstetrics and Gynaecology, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, China
| | - Shujuan Zhu
- Department of Obstetrics and Gynaecology, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, China.
| | - Bin Jiang
- Department of Obstetrics and Gynaecology, The Third Xiangya Hospital of Central South University, 138 Tongzipo Road, Changsha, China.
| |
Collapse
|
6
|
Han Y, Wu H, Sun S, Zhao R, Deng Y, Zeng S, Chen J. Effect of High Fat Diet on Disease Development of Polycystic Ovary Syndrome and Lifestyle Intervention Strategies. Nutrients 2023; 15:2230. [PMID: 37432488 PMCID: PMC10180647 DOI: 10.3390/nu15092230] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2023] [Revised: 05/01/2023] [Accepted: 05/04/2023] [Indexed: 07/12/2023] Open
Abstract
Polycystic ovary syndrome (PCOS) is a prevalent endocrine and metabolic disorder that affects premenopausal women. The etiology of PCOS is multifaceted, involving various genetic and epigenetic factors, hypothalamic-pituitary-ovarian dysfunction, androgen excess, insulin resistance, and adipose-related mechanisms. High-fat diets (HFDs) has been linked to the development of metabolic disorders and weight gain, exacerbating obesity and impairing the function of the hypothalamic-pituitary-ovarian axis. This results in increased insulin resistance, hyperinsulinemia, and the release of inflammatory adipokines, leading to heightened fat synthesis and reduced fat breakdown, thereby worsening the metabolic and reproductive consequences of PCOS. Effective management of PCOS requires lifestyle interventions such as dietary modifications, weight loss, physical activity, and psychological well-being, as well as medical or surgical interventions in some cases. This article systematically examines the pathological basis of PCOS and the influence of HFDs on its development, with the aim of raising awareness of the connection between diet and reproductive health, providing a robust approach to lifestyle interventions, and serving as a reference for the development of targeted drug treatments.
Collapse
Affiliation(s)
- Yingxue Han
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Hao Wu
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Siyuan Sun
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100190, China
| | - Rong Zhao
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Yifan Deng
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Shenming Zeng
- National Engineering Laboratory for Animal Breeding, Key Laboratory of Animal Genetics and Breeding of the Ministry of Agriculture, College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
| | - Juan Chen
- Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing 100190, China
| |
Collapse
|
7
|
Zhang Q, Ren J, Wang F, Li M, Pan M, Zhang H, Qu F. Chinese herbal medicine alleviates the pathogenesis of polycystic ovary syndrome by improving oxidative stress and glucose metabolism via mitochondrial Sirtuin 3 signaling. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 109:154556. [PMID: 36610149 DOI: 10.1016/j.phymed.2022.154556] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/20/2022] [Revised: 10/29/2022] [Accepted: 11/11/2022] [Indexed: 06/17/2023]
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders among women, and the curative effects of its current management are not satisfactory. A formula of Chinese herbal medicine (CHM), called Bu-Shen-Tian-Jing Formula (BSTJF), has clinically shown beneficial effects in treating PCOS. PURPOSE This study aimed to investigate the mechanism underlying BSTJF for treatment of PCOS. METHODS Whole blood samples were collected from women with PCOS treated and not treated with BSTJF (n = 5 per group). Whole transcriptome sequencing of leukocytes and untargeted metabonomic analysis of the plasma were performed. Three groups of 18 female Sprague-Dawley rats were randomly selected: control, PCOS, and BSTJF. A PCOS rat model was established using testosterone propionate. The estrous cycle; glucose tolerance; ovarian morphology; serum markers of oxidative stress; and expression of Sirtuin 3 (SIRT3), phospho-p38 mitogen-activated protein kinase, phosphatidylinositol 3-kinase (PI3K), and phospho-protein kinase B in the ovary were measured. Palmitate was initially applied to KGN cells, followed by freeze-dried BSTJF powder. The glucose uptake, reactive oxygen species (ROS) production, and protein levels of SIRT3, PI3K, and glucose transporter type 4 (GLUT4) were detected in KGN cells. RESULTS The transcriptomic and metabolomic profiles showed alterations in 572 genes and 73 metabolites in women with PCOS treated with BSTJF. The enriched pathways in women with PCOS treated with BSTJF were mainly involved in inflammation, insulin resistance, glucose and lipid metabolism, and neuro and associated signaling pathways. In PCOS rat models, BSTJF improved the estrous cycle, glucose tolerance, and ovarian morphology; relieved oxidative stress; increased ovarian SIRT3 expression; inhibited p38 MAPK activation; and promoted the activation of PI3K/AKT signaling in the ovary. In the in-vitro study with KGN cells, BSTJF rescued the palmitate-induced impaired glucose uptake and SIRT3 expression, reduced mitochondrial ROS production mediated by SIRT3, and restored the impaired insulin-induced PI3K/AKT signaling pathway. CONCLUSION BSTJF effectively alleviated the pathogenesis of PCOS by improving oxidative stress and glucose metabolism via mitochondrial SIRT3 and the following insulin signaling pathway. This study innovatively revealed the action mechanism of CHM in treating PCOS.
Collapse
Affiliation(s)
- Qing Zhang
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China; Zhejiang Hospital, Hangzhou, Zhejiang 310000, China
| | - Jun Ren
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China
| | - Fangfang Wang
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China
| | - Mingqian Li
- Tongde Hospital of Zhejiang Province, Hangzhou, Zhejiang 310012, China
| | - Manman Pan
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China
| | - Hui Zhang
- Zhejiang Vocational College of Special Education, Hangzhou, Zhejiang 310023, China
| | - Fan Qu
- Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310006, China.
| |
Collapse
|
8
|
Silva RS, Mattoso Miskulin Cardoso AP, Giometti IC, D'Aprile L, Garcia Santos FA, Maruyama AS, Medeiros de Carvalho Sousa LM, Unniappan S, Kowalewski MP, de Carvalho Papa P. Insulin induces steroidogenesis in canine luteal cells via PI3K-MEK-MAPK. Mol Cell Endocrinol 2022; 540:111518. [PMID: 34808277 DOI: 10.1016/j.mce.2021.111518] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 10/25/2021] [Accepted: 11/17/2021] [Indexed: 11/26/2022]
Abstract
Glucose uptake increases in canine luteal cells under insulin treatment. We hypothesize that insulin also increases luteal cell steroidogenesis. Dogs underwent elective ovariohysterectomy from days 10-60 post ovulation and their corpora lutea (CL) and blood samples were collected. Deep RNA sequencing determined differentially expressed genes in CL; those related to insulin signaling and steroidogenesis were validated in vivo by qPCR and their respective proteins by Western blotting and immunofluorescence. Next, luteal cell cultures were stimulated with insulin with or without inhibition of MAPK14, MAP2K1 and PI3K. Studied proteins except P450 aromatase showed the same expression pattern of coding genes in vivo. The expression of HSD3B and CYP19A1 was higher in insulin-treated cells (P < 0.005). Following respective pathway blockades, the culture medium had decreased concentrations of progesterone (P4) and 17b-estradiol (E2) (P < 0.01). Our results indicate that insulin increases HSD3B and CYP19A1 expression via MAPK and PI3K, and contributes to the regulation of P4 and E2 production in canine luteal cells.
Collapse
Affiliation(s)
- Renata Santos Silva
- School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil; FAMESP, Faculdade Método de São Paulo, Sao Paulo, Brazil
| | | | | | - Loren D'Aprile
- School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | - Arnaldo Shindi Maruyama
- School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | | | - Suraj Unniappan
- Laboratory of Integrative Neuroendocrinology, Depart. of Veterinary Biomedical Sciences, University of Saskatchewan, Saskatoon, SK, Canada
| | - Mariusz P Kowalewski
- Institute of Veterinary Anatomy, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland
| | - Paula de Carvalho Papa
- School of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil; Institute of Veterinary Anatomy, Vetsuisse Faculty, University of Zurich, Zurich, Switzerland.
| |
Collapse
|
9
|
Tremblay PG, Fortin C, Sirard MA. Gene cascade analysis in human granulosa tumor cells (KGN) following exposure to high levels of free fatty acids and insulin. J Ovarian Res 2021; 14:178. [PMID: 34930403 PMCID: PMC8690403 DOI: 10.1186/s13048-021-00934-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2021] [Accepted: 12/08/2021] [Indexed: 12/21/2022] Open
Abstract
Maternal metabolic disorders such as obesity and diabetes are detrimental factors that compromise fertility and the success rates of medically assisted procreation procedures. During metabolic stress, adipose tissue is more likely to release free fatty acids (FFA) in the serum resulting in an increase of FFA levels not only in blood, but also in follicular fluid (FF). In humans, high concentrations of palmitic acid and stearic acid reduced granulosa cell survival and were associated with poor cumulus-oocyte complex (COC) morphology. Obesity and high levels of circulating FFA were also causatively linked to hampered insulin sensitivity in cells and compensatory hyperinsulinemia. To provide a global picture of the principal upstream signaling pathways and genomic mechanisms involved in this metabolic context, human granulosa-like tumor cells (KGN) were treated with a combination of palmitic acid, oleic acid, and stearic acid at the higher physiological concentrations found in the follicular fluid of women with a higher body mass index (BMI) (≥ 30.0 kg/m2). We also tested a high concentration of insulin alone and in combination with high concentrations of fatty acids. Transcription analysis by RNA-seq with a cut off for fold change of 1.5 and p-value 0.05 resulted in thousands of differentially expressed genes for each treatment. Using analysis software such as Ingenuity Pathway Analysis (IPA), we were able to establish that high concentrations of FFA affected the expression of genes mainly related to glucose and insulin homoeostasis, fatty acid metabolism, as well as steroidogenesis and granulosa cell differentiation processes. The combination of insulin and high concentrations of FFA affected signaling pathways related to apoptosis, inflammation, and oxidative stress. Taken together, our results provided new information on the mechanisms that might be involved in human granulosa cells exposed to high concentrations of FFA and insulin in the contexts of metabolism disorders.
Collapse
Affiliation(s)
- Patricia G Tremblay
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada
| | - Chloé Fortin
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada
| | - Marc-André Sirard
- Centre de Recherche en Reproduction, Développement et Santé Intergénérationnelle, Faculté des Sciences de l'Agriculture et de l'Alimentation, Département des Sciences Animales, Université Laval, Québec, QC, G1V 0A6, Canada.
| |
Collapse
|
10
|
Mansoori A, Amoochi-Foroushani G, Zilaee M, Hosseini SA, Azhdari M. Serum and follicular fluid chemerin and chemerin mRNA expression in women with polycystic ovary syndrome: Systematic review and meta-analysis. ENDOCRINOLOGY DIABETES & METABOLISM 2021; 5:e00307. [PMID: 34699139 PMCID: PMC8754250 DOI: 10.1002/edm2.307] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/30/2021] [Revised: 10/04/2021] [Accepted: 10/09/2021] [Indexed: 12/16/2022]
Abstract
Introduction Polycystic ovary syndrome (PCOS) is one of the most common endocrine disorders among women of reproductive age. Chemerin, a novel adipokine, is involved in inflammation, energy metabolism, adipogenesis, angiogenesis and insulin secretion in the adipose cells and ovary. This systematic review with meta‐analysis aimed to compare serum and follicular fluid (FF) chemerin and ovarian chemerin mRNA expression among women with PCOS and non‐PCOS. Methods Electronic databases including Web of Science, PubMed, Google Scholar, Scopus, Cochrane and CINAHL were used for a comprehensive search through April 2021. Of the 174 articles initially identified, 22 studies met the eligibility criteria. A random‐effects model with a weighted mean difference (WMD) and 95% confidence interval (CI) was performed to compare the outcomes between groups. Subgroup and sensitivity analyses were performed to detect the sources of heterogeneity. Results Women with PCOS compared to without PCOS showed significantly higher serum chemerin [WMD: 12.02 pg/ml (95% CI: [10.92, 13.13]), p < .001], chemerin mRNA expression [WMD: 0.38% (95% CI [0.25, 0.52]), p = .001] and FF chemerin [(WMD): 41.7 pg/ml (95% CI [17.89, 65.5]) p < .001]. Further, serum chemerin remained high in PCOS women even with subgroup analysis based on body mass index (BMI) or sample size (p < .001). Serum chemerin was higher in women with PCOS and higher BMI [(WMD): 3.29 pg/ml (95% CI: [2.73, 3.384]), p < .001]. The expression of chemerin mRNA was significantly higher in the PCOS group compared to the control group [WMD: 0.38% (95% CI [0.25, 0.52]), p < .001]. Conclusion Serum and FF chemerin and mRNA expression were higher in the PCOS group compared to the controls. Further, serum chemerin was higher in PCOS women with higher BMI compared to lower BMI. The present findings illustrate that chemerin may be associated with PCOS status and BMI, independently.
Collapse
Affiliation(s)
- Anahita Mansoori
- Nutrition and Metabolic Diseases Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Nutrition, School of Allied Medical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Golnaz Amoochi-Foroushani
- Nutrition and Metabolic Diseases Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Nutrition, School of Allied Medical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Marzie Zilaee
- Nutrition and Metabolic Diseases Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Nutrition, School of Allied Medical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Seyed Ahmad Hosseini
- Nutrition and Metabolic Diseases Research Center, Clinical Sciences Research Institute, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran.,Department of Nutrition, School of Allied Medical Sciences, Ahvaz Jundishapur University of Medical Sciences, Ahvaz, Iran
| | - Maryam Azhdari
- Department of Nutrition, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| |
Collapse
|
11
|
Wang Y, Zeng Z, Zhao S, Tang L, Yan J, Li N, Zou L, Fan X, Xu C, Huang J, Xia W, Zhu C, Rao M. Humanin Alleviates Insulin Resistance in Polycystic Ovary Syndrome: A Human and Rat Model-Based Study. Endocrinology 2021; 162:bqab056. [PMID: 33693742 DOI: 10.1210/endocr/bqab056] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2020] [Indexed: 11/19/2022]
Abstract
Polycystic ovary syndrome (PCOS), the most common endocrine disorder in women of reproductive age, is characterized by hyperandrogenism and insulin resistance (IR); however, the pathogenesis of local ovarian IR in PCOS remains largely unclear. Humanin, a mitochondria-derived peptide, has been reported to be associated with IR. Our previous study confirmed that humanin is expressed in multiple cell types in the ovary and is present in follicular fluid. However, it remains unknown whether humanin participates in the pathogenesis of local ovarian IR or whether humanin supplementation can improve IR in PCOS patients. In this study, we compared humanin concentrations in follicular fluid from PCOS patients with and without IR. We further investigated the effect of humanin analogue (HNG) supplementation on IR in a rat model of dehydroepiandrosterone-induced PCOS. Humanin concentrations in the follicular fluid were found to be significantly lower in PCOS patients with IR than in those without IR. HNG supplementation attenuated both the increases in the levels of fasting plasma glucose and fasting insulin in rats with PCOS and the decreases in phosphorylation of IRS1, PI3K, AKT, and GLUT4 proteins in the granulosa cells of these rats. Combined supplementation with HNG and insulin significantly improved glucose consumption in normal and humanin-siRNA-transfected COV434 cells. In conclusion, downregulated humanin in the ovaries may be involved in the pathogenesis of IR in PCOS, and exogenous supplementation with HNG improved local ovarian IR through modulation of the IRS1/PI3K/Akt signaling pathway in a rat model. This finding supports the potential future use of HNG as a therapeutic drug for PCOS.
Collapse
Affiliation(s)
- Yingying Wang
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Zhengyan Zeng
- Department of General Medicine, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Shuhua Zhao
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Li Tang
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Jin Yan
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| | - Nianyu Li
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Liping Zou
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Xiaorong Fan
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Chengcheng Xu
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Jin Huang
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Wei Xia
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Reproductive Medicine Centre, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Changhong Zhu
- Reproductive Health Institute, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
- Reproductive Medicine Centre, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430030, China
| | - Meng Rao
- Department of Reproduction and Genetics, the First Affiliated Hospital of Kunming Medical University, Kunming 650032, China
| |
Collapse
|
12
|
Wołodko K, Castillo-Fernandez J, Kelsey G, Galvão A. Revisiting the Impact of Local Leptin Signaling in Folliculogenesis and Oocyte Maturation in Obese Mothers. Int J Mol Sci 2021; 22:4270. [PMID: 33924072 PMCID: PMC8074257 DOI: 10.3390/ijms22084270] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/25/2021] [Revised: 04/13/2021] [Accepted: 04/16/2021] [Indexed: 12/28/2022] Open
Abstract
The complex nature of folliculogenesis regulation accounts for its susceptibility to maternal physiological fitness. In obese mothers, progressive expansion of adipose tissue culminates with severe hyperestrogenism and hyperleptinemia with detrimental effects for ovarian performance. Indeed, maternal obesity is associated with the establishment of ovarian leptin resistance. This review summarizes current knowledge on potential effects of impaired leptin signaling throughout folliculogenesis and oocyte developmental competence in mice and women.
Collapse
Affiliation(s)
- Karolina Wołodko
- Department of Reproductive Immunology and Pathology, Institute of Animal Reproduction and Food Research of PAS, Tuwima 10, 10-748 Olsztyn, Poland;
| | | | - Gavin Kelsey
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK; (J.C.-F.); (G.K.)
- Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, UK
| | - António Galvão
- Department of Reproductive Immunology and Pathology, Institute of Animal Reproduction and Food Research of PAS, Tuwima 10, 10-748 Olsztyn, Poland;
- Epigenetics Programme, Babraham Institute, Cambridge CB22 3AT, UK; (J.C.-F.); (G.K.)
- Centre for Trophoblast Research, University of Cambridge, Cambridge CB2 3EG, UK
| |
Collapse
|
13
|
Imanaka S, Shigetomi H, Kobayashi H. Reprogramming of glucose metabolism of cumulus cells and oocytes and its therapeutic significance. Reprod Sci 2021; 29:653-667. [PMID: 33675030 DOI: 10.1007/s43032-021-00505-6] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Accepted: 02/21/2021] [Indexed: 12/17/2022]
Abstract
The aim of this review is to summarize our current understanding of the molecular mechanism for the glucose metabolism, especially pyruvate dehydrogenase (PDH), during oocyte maturation, as well as future perspectives of therapeutic strategies for aging focusing on metabolic regulation between aerobic glycolysis and the tricarboxylic acid (TCA) cycle/oxidative phosphorylation (OXPHOS). Each keyword alone or in combination was used to search from PubMed. Glucose metabolism is a dynamic process involving "On" and "Off" switches by the pyruvate dehydrogenase kinase (PDK)-PDH axis, which is crucial for energy metabolism and mitochondrial efficiency in cumulus cell differentiation and oocyte maturation. Activation of PDK suppresses the conversion of pyruvate to acetyl-coenzyme A (acetyl-CoA) through the inactivation of PDH, which allows the cumulus cells to supply sufficient amounts of pyruvate, lactate, and nicotinamide adenine dinucleotide phosphate (NADPH) to the oocytes. On the other hand, inactivation of PDK in oocytes can produce adenosine triphosphate (ATP) through a metabolic shift from aerobic glycolysis to the TCA cycle/OXPHOS. The metabolic balance between aerobic glycolysis and TCA cycle/OXPHOS presents us with a number of enzymes, ligands, receptors, and antioxidants that are potential therapeutic targets, some of which have already been successfully pursued to improve fertility outcomes. However, there are also many reports that question their efficacy. In conclusion, understanding the molecular mechanisms involved in the PDK-PDH axis is a crucial step to advance in novel therapeutic strategies to improve oocyte quality.
Collapse
Affiliation(s)
- Shogo Imanaka
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan.,Ms.Clinic MayOne, Kashihara, Japan
| | - Hiroshi Shigetomi
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan.,Aska Ladies Clinic, Nara, Japan
| | - Hiroshi Kobayashi
- Department of Obstetrics and Gynecology, Nara Medical University, Kashihara, Japan. .,Ms.Clinic MayOne, Kashihara, Japan.
| |
Collapse
|
14
|
Bai L, Wang W, Xiang Y, Wang S, Wan S, Zhu Y. Aberrant elevation of GDF8 impairs granulosa cell glucose metabolism via upregulating SERPINE1 expression in patients with PCOS. MOLECULAR THERAPY. NUCLEIC ACIDS 2020; 23:294-309. [PMID: 33425488 PMCID: PMC7779537 DOI: 10.1016/j.omtn.2020.11.005] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/07/2020] [Accepted: 11/05/2020] [Indexed: 02/07/2023]
Abstract
Clinical investigations have demonstrated that polycystic ovary syndrome (PCOS) is often accompanied by insulin resistance (IR) in more than 70% of women with PCOS. However, the etiology of PCOS with IR remains to be characterized. Growth differentiation factor 8 (GDF8) is an intraovarian factor that plays a vital role in the regulation of follicle development and ovulation. Previous studies have reported that GDF8 is a pathogenic factor in glucose metabolism disorder in IR patients. To date, the role of GDF8 on glucose metabolism of granulosa cell in PCOS patients remains to be determined. In the current study, we demonstrated that the expression and accumulation of GDF8 in human granulosa-lutein (hGL) cells and follicular fluid from PCOS patients were higher compared with those of non-PCOS women. GDF8 treatment caused glucose metabolism defects in hGL cells. Transcriptome sequencing results showed that SERPINE1 mediated GDF8-induced impairment of hGL glucose metabolism defects. Using pharmacological and small interfering RNA (siRNA)-mediated knockdown approaches, we demonstrated that GDF8 upregulated the expression of SERPINE1 via the ALK5-mediated SMAD2/3-SMAD4 signaling pathway. Interestingly, the extracellular signal-regulated kinase 1/2 (ERK1/2) signaling pathway was also activated with GDF8 treatment but did not participate in the effect of GDF8 on SERPINE1 expression. Our results also showed that TP53 was required for the GDF8-stimulated increase in SERPINE1 expression. Importantly, our study demonstrated that SB-431542 treatment significantly improved DHEA-induced PCOS-like ovaries. These findings support a potential role for GDF8 in metabolic disorders in PCOS.
Collapse
Affiliation(s)
- Long Bai
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Wei Wang
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Yu Xiang
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Shuyi Wang
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Shan Wan
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| | - Yimin Zhu
- Department of Reproductive Endocrinology, Women's Hospital, School of Medicine, Zhejiang University, Hangzhou, Zhejiang 310002, China.,Key Laboratory of Reproductive Genetics (Ministry of Education) and Women's Reproductive Health Laboratory of Zhejiang Province, Women's Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang 310002, China
| |
Collapse
|
15
|
Li X, Zhu Q, Wang W, Qi J, He Y, Wang Y, Lu Y, Wu H, Ding Y, Sun Y. Elevated chemerin induces insulin resistance in human granulosa-lutein cells from polycystic ovary syndrome patients. FASEB J 2019; 33:11303-11313. [PMID: 31311314 DOI: 10.1096/fj.201802829r] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
The insulin resistance (IR) of ovarian granulosa cells from polycystic ovary syndrome (PCOS) aggravates the abnormalities in steroidogenesis and anovulation, and chemerin is an adipokine involved in regulating adipogenesis and glucose homeostasis. The role and underlying mechanism of chemerin in developing IR of the granulosa cells from PCOS remain unclear. Plasma, follicular fluid, and human granulosa-lutein cells (hGLs) were collected from non-PCOS and patients with PCOS with or without IR. The chemerin levels were elevated in both follicular fluid and hGL samples from patients with PCOS with IR, and the hGLs from patients with PCOS with IR showed decreased insulin sensitivity and impaired glucose uptake capacity. Moreover, treatment of chemerin attenuated insulin-stimulated glucose uptake by decreasing phosphorylation of insulin receptor substrate (IRS)1/2 Tyr612, phosphorylation of protein kinase B Ser473, and membrane translocation of glucose transporter type 4 through increasing Ser307 phosphorylation of IRS1 in cultured hGLs. These effects could be abolished by small interfering RNA-mediated knockdown of chemokine-like receptor 1. Furthermore, insulin induced the expression of chemerin in hGLs. Our findings demonstrate a novel role of chemerin in the metabolic dysfunction of PCOS, which suggested that chemerin and its receptor can be further implicated as potential therapeutic targets in the future treatment of PCOS.-Li, X., Zhu, Q., Wang, W., Qi, J., He, Y., Wang, Y., Lu, Y., Wu, H., Ding, Y., Sun, Y. Elevated chemerin induces insulin resistance in human granulosa-lutein cells from polycystic ovary syndrome patients.
Collapse
Affiliation(s)
- Xiaoxue Li
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Qinling Zhu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Wangsheng Wang
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Jia Qi
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yaqiong He
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yuan Wang
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yao Lu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Hasiximuke Wu
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Ying Ding
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| | - Yun Sun
- Center for Reproductive Medicine, Renji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.,Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| |
Collapse
|
16
|
Walter J, Huwiler F, Fortes C, Grossmann J, Roschitzki B, Hu J, Naegeli H, Laczko E, Bleul U. Analysis of the equine "cumulome" reveals major metabolic aberrations after maturation in vitro. BMC Genomics 2019; 20:588. [PMID: 31315563 PMCID: PMC6637639 DOI: 10.1186/s12864-019-5836-5] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2018] [Accepted: 05/23/2019] [Indexed: 12/12/2022] Open
Abstract
Background Maturation of oocytes under in vitro conditions (IVM) results in impaired developmental competence compared to oocytes matured in vivo. As oocytes are closely coupled to their cumulus complex, elucidating aberrations in cumulus metabolism in vitro is important to bridge the gap towards more physiological maturation conditions. The aim of this study was to analyze the equine “cumulome” in a novel combination of proteomic (nano-HPLC MS/MS) and metabolomic (UPLC-nanoESI-MS) profiling of single cumulus complexes of metaphase II oocytes matured either in vivo (n = 8) or in vitro (n = 7). Results A total of 1811 quantifiable proteins and 906 metabolic compounds were identified. The proteome contained 216 differentially expressed proteins (p ≤ 0.05; FC ≥ 2; 95 decreased and 121 increased in vitro), and the metabolome contained 108 metabolites with significantly different abundance (p ≤ 0.05; FC ≥ 2; 24 decreased and 84 increased in vitro). The in vitro “cumulome” was summarized in the following 10 metabolic groups (containing 78 proteins and 21 metabolites): (1) oxygen supply, (2) glucose metabolism, (3) fatty acid metabolism, (4) oxidative phosphorylation, (5) amino acid metabolism, (6) purine and pyrimidine metabolism, (7) steroid metabolism, (8) extracellular matrix, (9) complement cascade and (10) coagulation cascade. The KEGG pathway “complement and coagulation cascades” (ID4610; n = 21) was significantly overrepresented after in vitro maturation. The findings indicate that the in vitro condition especially affects central metabolism and extracellular matrix composition. Important candidates for the metabolic group oxygen supply were underrepresented after maturation in vitro. Additionally, a shift towards glycolysis was detected in glucose metabolism. Therefore, under in vitro conditions, cumulus cells seem to preferentially consume excess available glucose to meet their energy requirements. Proteins involved in biosynthetic processes for fatty acids, cholesterol, amino acids, and purines exhibited higher abundances after maturation in vitro. Conclusion This study revealed the marked impact of maturation conditions on the “cumulome” of individual cumulus oocyte complexes. Under the studied in vitro milieu, cumulus cells seem to compensate for a lack of important substrates by shifting to aerobic glycolysis. These findings will help to adapt culture media towards more physiological conditions for oocyte maturation. Electronic supplementary material The online version of this article (10.1186/s12864-019-5836-5) contains supplementary material, which is available to authorized users.
Collapse
Affiliation(s)
- Jasmin Walter
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057, Zurich, Switzerland.
| | - Fabian Huwiler
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057, Zurich, Switzerland
| | - Claudia Fortes
- Functional Genomics Center Zurich, University and ETH Zurich, 8057, Zurich, Switzerland
| | - Jonas Grossmann
- Functional Genomics Center Zurich, University and ETH Zurich, 8057, Zurich, Switzerland
| | - Bernd Roschitzki
- Functional Genomics Center Zurich, University and ETH Zurich, 8057, Zurich, Switzerland
| | - Junmin Hu
- Functional Genomics Center Zurich, University and ETH Zurich, 8057, Zurich, Switzerland
| | - Hanspeter Naegeli
- Institute of Pharmacology and Toxicology, Vetsuisse Faculty, University of Zurich, 8057, Zurich, Switzerland
| | - Endre Laczko
- Functional Genomics Center Zurich, University and ETH Zurich, 8057, Zurich, Switzerland
| | - Ulrich Bleul
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, 8057, Zurich, Switzerland
| |
Collapse
|
17
|
Xu L, Wang W, Zhang X, Ke H, Qin Y, You L, Li W, Lu G, Chan WY, Leung PCK, Zhao S, Chen ZJ. Palmitic acid causes insulin resistance in granulosa cells via activation of JNK. J Mol Endocrinol 2019; 62:197-206. [PMID: 30913535 DOI: 10.1530/jme-18-0214] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2019] [Accepted: 03/26/2019] [Indexed: 12/15/2022]
Abstract
Obesity is a worldwide health problem with rising incidence and results in reproductive difficulties. Elevated saturated free fatty acids (FFAs) in obesity can cause insulin resistance (IR) in peripheral tissues. The high intra-follicular saturated FFAs may also account for IR in ovarian granulosa cells (GCs). In the present study, we investigated the relationship between saturated FFAs and IR in GCs by the use of palmitic acid (PA). We demonstrated that the glucose uptake in cultured GCs and lactate accumulation in the culture medium were stimulated by insulin, but the effects of insulin were attenuated by PA treatment. Besides, insulin-induced phosphorylation of Akt was reduced by PA in a dose- and time-dependent manner. Furthermore, PA increased phosphorylation of JNK and JNK blockage rescued the phosphorylation of Akt which was downregulated by PA. These findings highlighted the negative effect of PA on GCs metabolism and may partially account for the obesity-related reproductive disorders.
Collapse
Affiliation(s)
- Lan Xu
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Wenting Wang
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
- The Second Hospital of Shandong University, Jinan, China
| | - Xinyue Zhang
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Hanni Ke
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Yingying Qin
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Li You
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
| | - Weiping Li
- Department of Obstetrics and Gynecology, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Gang Lu
- The CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Wai-Yee Chan
- The CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Peter C K Leung
- Department of Obstetrics and Gynecology, University of British Columbia, BC Children's Hospital Research Institute, Vancouver, Canada
| | - Shidou Zhao
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
- The CUHK-SDU Joint Laboratory on Reproductive Genetics, School of Biomedical Sciences, The Chinese University of Hong Kong, Hong Kong SAR, China
| | - Zi-Jiang Chen
- Center for Reproductive Medicine, Shandong University, Shandong Provincial Hospital Affiliated to Shandong University, National Research Center for Assisted Reproductive Technology and Reproductive Genetics, The Key Laboratory of Reproductive Endocrinology (Shandong University), Ministry of Education, Jinan, China
- Center for Reproductive Medicine, Ren Ji Hospital, School of Medicine, Shanghai Jiao Tong University, Shanghai Key Laboratory for Assisted Reproduction and Reproductive Genetics, Shanghai, China
| |
Collapse
|
18
|
Li J, Wang S, Wang B, Wei H, Liu X, Hao J, Duan Y, Hua J, Zheng X, Feng X, Yan X. High-fat-diet impaired mitochondrial function of cumulus cells but improved the efficiency of parthenogenetic embryonic quality in mice. Anim Cells Syst (Seoul) 2018; 22:243-252. [PMID: 30460104 PMCID: PMC6138337 DOI: 10.1080/19768354.2018.1497707] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2018] [Revised: 04/16/2018] [Accepted: 04/28/2018] [Indexed: 01/24/2023] Open
Abstract
Global human health has been compromised by high-fat diets. This study aimed to investigate the relationship between a high-fat diet and parthenogenetic embryo quality. Mice fed a high-fat or a normal diet was used as treated or control groups, respectively. Estradiol (E2), total cholesterol (TC) and total triglyceride (TG) were detected by Enzyme-Linked ImmunoSorbent Assay (ELISA). Cumulus-oocyte complexes (COCs) were collected from the mice in the treated and control groups. The ultrastructure of COCs, the expression level of genes involved in mitochondrial and nuclear functions in cumulus cells and oocytes quality were evaluated with transmission electron microscopy, real-time quantitative polymerase chain reaction (RT-PCR) and artificial parthenogenesis, respectively. The results showed that the efficiency of parthenogenetic embryonic development in vitro was significantly higher in the treated group than in the control group (p < .05). The expression level of genes involved in mitochondrial function was lower in cumulus cells from the treated group than that from the control group (p < .05). The estradiol and cholesterol level in the serum and the expression level of P450 arom were higher in the treated group than the control group (p < .05). The reactive oxygen species (ROS) level was higher in culumus cells from the treated group than the control group, while the mitochondrial membrane potential was lower in cumulus cells from the treated group (p < .05). Accumulation of lipid droplets was only in cumulus but in oocyte, the results demonstrated that mitochondrial functions were impaired by a high-fat diet, but parthenogenetic embryonic development in vitro was improved, in controllable range of damage for the body.
Collapse
Affiliation(s)
- Jingjing Li
- College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Shuang Wang
- Department of Experimental Surgery of Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Bo Wang
- College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Hao Wei
- College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Xin Liu
- College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| | - Jun Hao
- Department of Experimental Surgery of Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Yanping Duan
- Department of Experimental Surgery of Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Jinlian Hua
- Biotechnology, Northwest A&F University, Yangling, People's Republic of China
| | - Xiaomin Zheng
- Key Laboratory of Fertility Preservation and Maintenance, Ministry of Education, Key Laboratory of Reproduction and Genetics in Ningxia, Ningxia Medical University, Yinchuan, People's Republic of China.,Department of Histology and Embryology, Ningxia Medical University, Yinchuan, People's Republic of China
| | - Xiuliang Feng
- Department of Experimental Surgery of Xijing Hospital, Fourth Military Medical University, Xi'an, People's Republic of China
| | - Xingrong Yan
- College of Life Sciences, Northwest University, Xi'an, People's Republic of China
| |
Collapse
|
19
|
Andrisse S, Billings K, Xue P, Wu S. Insulin signaling displayed a differential tissue-specific response to low-dose dihydrotestosterone in female mice. Am J Physiol Endocrinol Metab 2018; 314:E353-E365. [PMID: 29351485 PMCID: PMC5966754 DOI: 10.1152/ajpendo.00195.2017] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/14/2017] [Revised: 12/14/2017] [Accepted: 12/18/2017] [Indexed: 02/08/2023]
Abstract
Hyperandrogenemia and hyperinsulinemia are believed to play prominent roles in polycystic ovarian syndrome (PCOS). We explored the effects of low-dose dihydrotestosterone (DHT), a model of PCOS, on insulin signaling in metabolic and reproductive tissues in a female mouse model. Insulin resistance in the energy storage tissues is associated with type 2 diabetes. Insulin signaling in the ovaries and pituitary either directly or indirectly stimulates androgen production. Energy storage and reproductive tissues were isolated and molecular assays were performed. Livers and white adipose tissue (WAT) from DHT mice displayed lower mRNA and protein expression of insulin signaling intermediates. However, ovaries and pituitaries of DHT mice exhibited higher expression levels of insulin signaling genes/proteins. Insulin-stimulated p-AKT levels were blunted in the livers and WAT of the DHT mice but increased or remained the same in the ovaries and pituitaries compared with controls. Glucose uptake decreased in liver and WAT but was unchanged in pituitary and ovary of DHT mice. Plasma membrane GLUTs were decreased in liver and WAT but increased in ovary and pituitary of DHT mice. Skeletal muscle insulin-signaling genes were not lowered in DHT mice compared with control. DHT mice did not display skeletal muscle insulin resistance. Insulin-stimulated glucose transport increased in skeletal muscles of DHT mice compared with controls. DHT mice were hyperinsulinemic. However, the differential mRNA and protein expression pattern was independent of hyperinsulinemia in cultured hepatocytes and pituitary cells. These findings demonstrate a differential effect of DHT on the insulin-signaling pathway in energy storage vs. reproductive tissues independent of hyperinsulinemia.
Collapse
Affiliation(s)
- Stanley Andrisse
- Division of Pediatric Endocrinology, Johns Hopkins School of Medicine , Baltimore, Maryland
- Department of Physiology and Biophysics, Howard University College of Medicine , Washington, District of Columbia
| | - Katelyn Billings
- Division of Pediatric Endocrinology, Johns Hopkins School of Medicine , Baltimore, Maryland
| | - Ping Xue
- Division of Pediatric Endocrinology, Johns Hopkins School of Medicine , Baltimore, Maryland
| | - Sheng Wu
- Division of Pediatric Endocrinology, Johns Hopkins School of Medicine , Baltimore, Maryland
| |
Collapse
|
20
|
Abstract
The prevalence of obesity is high among reproductive-age women and is associated with impaired reproductive function. Obesity is multifactorial in origin, yet many cases of obesity result from overconsumption of a diet high in fat. Excess dietary fat increases both adipose and nonadipose tissue lipid content and, through lipotoxicity, leads to cell dysfunction and death. High dietary fat intake, with or without the development of obesity, impairs female hypothalamic-pituitary-ovarian (HPO) axis functionality and fertility. Based on the current evidence, it appears the reproductive dysfunction involves increased leptin and insulin signaling at the various levels of the HPO axis, as well as changes in peroxisome proliferator-activated receptor γ actions and increased inflammation, yet other mechanisms may also be involved. This review summarizes the current body of knowledge on impaired female reproductive function after high-fat diet exposure, as well as discusses proposed mechanisms through which this may occur.
Collapse
Affiliation(s)
- Natalie M Hohos
- Division of Reproductive Sciences, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado 80045
| | - Malgorzata E Skaznik-Wikiel
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynecology, University of Colorado School of Medicine, Aurora, Colorado 80045
| |
Collapse
|
21
|
Wang G, Wang JJ, Guan R, Du L, Gao J, Fu XL. Strategies to Target Glucose Metabolism in Tumor Microenvironment on Cancer by Flavonoids. Nutr Cancer 2017; 69:534-554. [PMID: 28323500 DOI: 10.1080/01635581.2017.1295090] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
The imbalance between glucose metabolism and cancer cell growth in tumor microenvironment (TME), which are closely related with the occurrence and progression of cancer. Accumulating evidence has demonstrated that flavonoids exert many biological properties, including antioxidant and anticarcinogenic activities. Recently, the roles and applications of flavonoids, particularly in relation to glucose metabolism in cancers, have been highlighted. Thus, the identification of flavonoids targeting alternative glucose metabolism pathways in TME may represent an attractive approach to the more effective therapeutic strategies for cancer. In this review, we will focus on the roles of flavonoids in regulating glucose metabolism and cancer cell growth in TME, such as proliferation advantage, cell mobility, and chemoresistance to cancer, as well as modifiers of thermal sensitivity. Not only have such large-scale endeavors been useful in providing fundamental insights into natural and synthesized flavonoids that can prevent and treat cancer, but also have led to the discovery of potential targets for cancer therapy.
Collapse
Affiliation(s)
- Gang Wang
- a Department of Pharmaceutics , Jiangsu University , Shanghai , China
- b Hubei University of Medicine , Shiyan , China
| | - Jun-Jie Wang
- a Department of Pharmaceutics , Jiangsu University , Shanghai , China
- b Hubei University of Medicine , Shiyan , China
| | - Rui Guan
- b Hubei University of Medicine , Shiyan , China
| | - Li Du
- a Department of Pharmaceutics , Jiangsu University , Shanghai , China
| | - Jing Gao
- c Jiangsu University Health Science Center , Jiangsu , China
| | - Xing-Li Fu
- c Jiangsu University Health Science Center , Jiangsu , China
| |
Collapse
|
22
|
Identification of Polycystic Ovary Syndrome (PCOS) Specific Genes in Cumulus and Mural Granulosa Cells. PLoS One 2016; 11:e0168875. [PMID: 27997581 PMCID: PMC5173369 DOI: 10.1371/journal.pone.0168875] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2016] [Accepted: 12/07/2016] [Indexed: 11/19/2022] Open
Abstract
Polycystic ovary syndrome (PCOS) is a metabolic and endocrine disorder which affects women of reproductive age with prevalence of 8–18%. The oocyte within the follicle is surrounded by cumulus cells (CCs), which connect with mural granulosa cells (MGCs) that are responsible for secreting steroid hormones. The main aim of this study is comparing gene expression profiles of MGCs and CCs in PCOS and control samples to identify PCOS-specific differentially expressed genes (DEGs). In this study, two microarray databases were searched for mRNA expression microarray studies performed with CCs and MGCs obtained from PCOS patients and control samples. Three independent studies were selected to be integrated with naive meta-analysis since raw meta-data from these studies were found to be highly correlated. DEGs in these somatic cells were identified for PCOS and control groups. This study enabled us to reveal dysregulation in MAPK (mitogen activated protein kinase), insulin and Wnt signaling pathways between CCs and MGCs in PCOS. The meta-analysis results together with qRT-PCR validations provide evidence that molecular signaling is dysregulated through MGCs and CCs in PCOS, which is important for follicle and oocyte maturation and may contribute to the pathogenesis of the syndrome.
Collapse
|
23
|
Promotion of glucose utilization by insulin enhances granulosa cell proliferation and developmental competence of porcine oocyte grown in vitro. ZYGOTE 2016; 25:65-74. [DOI: 10.1017/s0967199416000356] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
SummaryIn vitro culture of the oocyte granulosa cell complexes (OGCs) from early antral follicles (EAFs) shows granulosa cell (GC) proliferation, but to a lesser extent than that observed in vivo during follicle development. As the number of GCs closely relates to energy sufficiency of the oocytes, enhancement of GC proliferation influences oocyte development. GC proliferation depends on glycolysis and insulin-mediated AKT/mTOR signaling pathway; therefore, addition of culture medium containing insulin and glucose may potentially promote GC proliferation and hence improve oocyte development. In the present study, we assessed the effect of exogenous insulin and glucose concentration on GC proliferation and oocyte energy status as well as developmental abilities of porcine oocytes grown in vitro. In the presence of 5.5 mM of glucose (Low), a comparison of 10 versus 20 μg/ml insulin showed that high insulin enhanced GC proliferation but exhausted glucose from the medium, which resulted in low energy status including lipid and adenosine triphosphate of the oocyte. Whereas, in the presence of 20 μg/ml insulin, medium with 11 mM glucose (High) enhanced GC proliferation and oocyte energy status as well as developmental ability up to the blastocyst stage. Considering that there was no difference in OGCs development observed with medium (10 μg/ml insulin) containing 5.5 versus 11 mM glucose, we concluded that the combination of high insulin and glucose enhanced GC proliferation and energy status of oocytes as well as the developmental ability of the oocytes grown in vitro.
Collapse
|
24
|
Sousa LMMDC, Silva RDS, Fonseca VUD, Leandro RM, Di Vincenzo TS, Alves-Wagner AB, Machado UF, Papa PDC. Is the canine corpus luteum an insulin-sensitive tissue? J Endocrinol 2016; 231:223-233. [PMID: 27679426 DOI: 10.1530/joe-16-0173] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/03/2016] [Accepted: 09/27/2016] [Indexed: 01/08/2023]
Abstract
This study aimed to determine in the canine corpus luteum throughout the dioestrus (1) the influence of insulin on glucose uptake; (2) the regulation of genes potentially involved; and (3) the influence of hypoxia on glucose transporter expression and steroidogenesis, after treatment with cobalt chloride (CoCl2). Glucose uptake by luteal cells increased 2.7 folds (P < 0.05) in response to insulin; a phenomenon related to increased expression of glucose transporter (GLUT) 4 and phosphorylation of protein kinase B (AKT). The gene expression of insulin receptor and SLC2A4 (codifier of GLUT4) genes after insulin stimulation increased on day 20 post ovulation (p.o.) and declined on day 40 p.o. (P < 0.05). Regarding potentially involved molecular mechanisms, the nuclear factor kappa B gene RELA was upregulated on days 30/40 p.o., when SLC2A4 mRNA was low, and the interleukin 6 (IL6) gene was upregulated in the first half of dioestrus, when SLC2A4 mRNA was high. CoCl2 in luteal cell cultures increased the hypoxia-inducible factor HIF1A/HIF1A and the SLC2A4/GLUT4 expression, and decreased progesterone (P4) production and hydroxyl-delta-5-steroid dehydrogenase 3 beta (HSD3B) mRNA expression (P < 0.05). This study shows that the canine luteal cells are responsive to insulin, which stimulates glucose uptake in AKT/GLUT4-mediated pathway; that may be related to local activity of RELA and IL6. Besides, the study reveals that luteal cells under hypoxia activate HIF1A-modulating luteal function and insulin-stimulated glucose uptake. These data indicate that insulin regulates luteal cells' glucose disposal, participating in the maintenance and functionality of the corpus luteum.
Collapse
Affiliation(s)
| | - Renata Dos Santos Silva
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Vanessa Uemura da Fonseca
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Rafael Magdanelo Leandro
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Thiago Senna Di Vincenzo
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| | - Ana Bárbara Alves-Wagner
- Department of Physiology and BiophysicsInstitute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Ubiratan Fabres Machado
- Department of Physiology and BiophysicsInstitute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Paula de Carvalho Papa
- Department of SurgerySchool of Veterinary Medicine and Animal Science, University of São Paulo, São Paulo, Brazil
| |
Collapse
|
25
|
Laskowski D, Sjunnesson Y, Humblot P, Andersson G, Gustafsson H, Båge R. The functional role of insulin in fertility and embryonic development-What can we learn from the bovine model? Theriogenology 2016; 86:457-64. [PMID: 27177960 DOI: 10.1016/j.theriogenology.2016.04.062] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2015] [Revised: 12/22/2015] [Accepted: 03/14/2016] [Indexed: 10/21/2022]
Abstract
Insulin is a key metabolic hormone that plays a crucial role in regulating energy homeostasis in the body. In addition, insulin-dependent signaling has important functions in reproduction and early embryo development. As metabolism and reproduction are closely linked, metabolic challenges may be the source of reproductive disorders and decreased fertility. This is known for the dairy cow and for other species including the human. Although metabolic disorders in the dairy cow often derive from a failure to adapt to a high milk production, the situation in the human is often linked to emerging conditions and associated diseases in our modern society such as obesity and diabetes, where an excess energy intake causes decreased fertility in women. Both energy excess and energy deficit are associated with a deviation of insulin concentrations in serum and follicular fluid from normal levels. Although many studies have shown that extreme variation in energy supply can negatively influence early embryo development by inducing changes in circulating concentrations of several metabolites or hormones like insulin, several in vitro culture media are still supplemented with insulin in high concentrations. In this review, direct and indirect effects of insulin on fertility will be described. Differences between the in vivo and in vitro situations will also be discussed.
Collapse
Affiliation(s)
- D Laskowski
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden.
| | - Y Sjunnesson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - P Humblot
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - G Andersson
- Department of Animal Breeding and Genetics, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - H Gustafsson
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| | - R Båge
- Department of Clinical Sciences, Swedish University of Agricultural Sciences, Uppsala, Sweden
| |
Collapse
|
26
|
Laskowski D, Sjunnesson Y, Humblot P, Sirard MA, Andersson G, Gustafsson H, Båge R. Insulin exposure during in vitro bovine oocyte maturation changes blastocyst gene expression and developmental potential. Reprod Fertil Dev 2016; 29:RD15315. [PMID: 26922243 DOI: 10.1071/rd15315] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2015] [Accepted: 12/16/2015] [Indexed: 02/28/2024] Open
Abstract
Metabolic imbalance impairs fertility, because changes in concentrations of metabolites and hormones in the blood and follicular fluid create an unfavourable environment for early embryonic development. Insulin is a key metabolic hormone known for its effects on fertility: insulin concentrations are increased during energy balance disturbances in diabetes or metabolic syndrome. Still, insulin is frequently used at supraphysiological concentrations for embryo in vitro culture with unknown consequences for the developmental potential of the offspring. In the present study we investigated the effects of insulin exposure during in vitro bovine oocyte maturation on developmental rates, embryo quality and gene expression. Supplementation of the maturation media with insulin at 10 or 0.1 µg mL-1 decreased blastocyst rates compared with an insulin-free control (19.8 ± 1.3% and 20.4 ± 1.3% vs 23.8 ± 1.3%, respectively; P < 0.05) and led to increased cell numbers (nearly 10% more cells on Day 8 compared with control; P < 0.05). Transcriptome analysis revealed significant upregulation of genes involved in lipid metabolism, nuclear factor (erythroid-derived 2)-like 2 (NRF2) stress response and cell differentiation, validated by quantitative polymerase chain reaction. To conclude, the results of the present study demonstrate that insulin exposure during in vitro oocyte maturation has a lasting effect on the embryo until the blastocyst stage, with a potential negative effect in the form of specific gene expression perturbations.
Collapse
|
27
|
Boudoures AL, Chi M, Thompson A, Zhang W, Moley KH. The effects of voluntary exercise on oocyte quality in a diet-induced obese murine model. Reproduction 2015; 151:261-70. [PMID: 26700938 DOI: 10.1530/rep-15-0419] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/07/2015] [Accepted: 12/22/2015] [Indexed: 12/31/2022]
Abstract
Obesity negatively affects many aspects of the human body including reproductive function. In females, the root of the decline in fertility is linked to problems in the oocyte. Problems seen in oocytes that positively correlate with increasing BMI include changes to the metabolism, lipid accumulation, meiosis, and metaphase II (MII) spindle structure. Studies in mice indicate that dietary interventions fail to reverse these problems. How exercise affects the oocytes has not been addressed. Therefore, we hypothesized an exercise intervention would improve oocyte quality. Here we show that in a mouse model of an exercise, intervention can improve lipid metabolism in germinal vesicle (GV) stage oocytes. Oocytes significantly increased activity and transcription of the β-oxidation enzyme hydroxyacyl-coenzyme A dehydrogenase in response to exercise training only if the mice had been fed a high-fat diet (HFD). An exercise intervention also reversed the lipid accumulation seen in GV stage oocytes of HFD females. However, delays in meiosis and disorganized MII spindles remained present. Therefore, exercise is able to improve, but not reverse, damage imparted on oocytes as a result of an HFD and obesity. By utilizing an exercise intervention on an HFD, we determined only lipid content, and lipid metabolism is changed in GV oocytes. Moving forward, interventions to improve oocyte quality may need to be more targeted to the oocyte specifically. Because of the HFD-induced deficiency in β-oxidation, dietary supplementation with substrates to improve lipid utilization may be more beneficial.
Collapse
Affiliation(s)
- Anna L Boudoures
- Division of Basic Science ResearchDepartment of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, 425 South Euclid Avenue, Campus Box 8064, St Louis, Missouri 63110, USA
| | - Maggie Chi
- Division of Basic Science ResearchDepartment of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, 425 South Euclid Avenue, Campus Box 8064, St Louis, Missouri 63110, USA
| | - Alysha Thompson
- Division of Basic Science ResearchDepartment of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, 425 South Euclid Avenue, Campus Box 8064, St Louis, Missouri 63110, USA
| | - Wendy Zhang
- Division of Basic Science ResearchDepartment of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, 425 South Euclid Avenue, Campus Box 8064, St Louis, Missouri 63110, USA
| | - Kelle H Moley
- Division of Basic Science ResearchDepartment of Obstetrics and Gynecology, Washington University in St. Louis School of Medicine, 425 South Euclid Avenue, Campus Box 8064, St Louis, Missouri 63110, USA
| |
Collapse
|
28
|
Celik O, Aydin S, Celik N, Yilmaz M. Peptides: Basic determinants of reproductive functions. Peptides 2015; 72:34-43. [PMID: 26074346 DOI: 10.1016/j.peptides.2015.05.016] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/13/2015] [Revised: 05/28/2015] [Accepted: 05/29/2015] [Indexed: 12/22/2022]
Abstract
Mammalian reproduction is a costly process in terms of energy consumption. The critical information regarding metabolic status is signaled to the hypothalamus mainly through peripheral peptides from the adipose tissue and gastrointestinal tract. Changes in energy stores produce fluctuations in leptin, insulin, ghrelin and glucose signals that feedback mainly to the hypothalamus to regulate metabolism and fertility. In near future, possible effects of the nutritional status on GnRH regulation can be evaluated by measuring serum or tissue levels of leptin and ghrelin in patiens suffering from infertility. The fact that leptin and ghrelin are antagonistic in their effects on GnRH neurons, their respective agonistic and antagonistic roles make them ideal candidates to use instead of GnRH agonist and antagonist. Similarly, kisspeptin expressing neurons are likely to mediate the well-established link between energy balance and reproductive functions. Exogenous kisspeptin can be used for physiological ovarian hyperstimulation for in-vitro fertilization. Moreover, kisspeptin antagonist therapy can be used for the treatment of postmenapousal women, precocious puberty, PCOS, endometriosis and uterine fibroids. In this review, we will analyze the central mechanisms involved in the integration of metabolic information and their contribution to the control of the reproductive function. Particular attention will be paid to summarize the participation of leptin, kisspeptin, ghrelin, NPY, orexin, urocortin, VIP, insulin, galanin, galanin like peptide, oxytocin, agouti gene-related peptide, and POMC neurons in this process and their possible interactions to contribute to the metabolic control of reproduction.
Collapse
Affiliation(s)
- Onder Celik
- Private Clinic, Department of Obstetrics and Gynecology, İzmir, Turkey
| | - Suleyman Aydin
- Firat University, School of Medicine, Department of Medical Biochemistry (Firat Hormones Research Group), 23119 Elazig, Turkey.
| | - Nilufer Celik
- Behcet Uz Children's Hospital, Department of Biochemistry, İzmir, Turkey
| | - Musa Yilmaz
- Firat University, School of Medicine, Department of Medical Biochemistry (Firat Hormones Research Group), 23119 Elazig, Turkey
| |
Collapse
|
29
|
Sasson IE, Vitins AP, Mainigi MA, Moley KH, Simmons RA. Pre-gestational vs gestational exposure to maternal obesity differentially programs the offspring in mice. Diabetologia 2015; 58:615-24. [PMID: 25608625 PMCID: PMC4452998 DOI: 10.1007/s00125-014-3466-7] [Citation(s) in RCA: 80] [Impact Index Per Article: 8.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/17/2014] [Accepted: 11/04/2014] [Indexed: 11/25/2022]
Abstract
AIMS/HYPOTHESIS Maternal obesity is associated with an increased risk of obesity and impaired glucose homeostasis in offspring. However, it is not known whether a gestational or pre-gestational exposure confers similar risks, and if so, what the underlying mechanisms are. METHODS We used reciprocal two-cell embryo transfers between mice fed either a control or high-fat diet (HFD) starting at the time of weaning. Gene expression in placenta was assessed by microarray analyses. RESULTS A pre-gestational exposure to a maternal HFD (HFD/control) impaired fetal and placental growth despite a normal gestational milieu. Expression of imprinted genes and genes regulating vasculogenesis and lipid metabolism was markedly altered in placenta of HFD/control. An exposure to an HFD (control/HFD) only during gestation also resulted in fetal growth restriction and decreased placental weight. Interestingly, only a gestational exposure to an HFD (control/HFD) resulted in obesity and impaired glucose tolerance in adulthood. CONCLUSIONS/INTERPRETATION An HFD during pregnancy has profound consequences for the offspring later in life. Our data demonstrate that the mechanism underlying this phenomenon is not related to placental dysfunction, intrauterine growth restriction or postnatal weight gain, but rather an inability of the progeny to adapt to the abnormal gestational milieu of an HFD. Thus, the ability to adapt to an adverse intrauterine environment is conferred prior to pregnancy and it is possible that the effects of a maternal HFD may be transmitted to subsequent generations.
Collapse
Affiliation(s)
- Isaac E. Sasson
- Department of Obstetrics and Gynecology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Alexa P. Vitins
- Center for Research on Reproduction and Women’s Health, Biomedical Research Building II/III 1308, Perelman School of Medicine, University of Pennsylvania, 421 Curie Boulevard, Philadelphia, PA 19104, USA
| | - Monica A. Mainigi
- Department of Obstetrics and Gynecology, Perelman School of Medicine at the University of Pennsylvania, Philadelphia, PA, USA
| | - Kelle H. Moley
- Department of Obstetrics and Gynecology, Washington University in St Louis, St Louis, MO, USA
| | - Rebecca A. Simmons
- Center for Research on Reproduction and Women’s Health, Biomedical Research Building II/III 1308, Perelman School of Medicine, University of Pennsylvania, 421 Curie Boulevard, Philadelphia, PA 19104, USA. Children’s Hospital of Philadelphia, Philadelphia, PA, USA
| |
Collapse
|
30
|
Maruthini D, Harris SE, Barth JH, Balen AH, Campbell BK, Picton HM. The effect of metformin treatment in vivo on acute and long-term energy metabolism and progesterone production in vitro by granulosa cells from women with polycystic ovary syndrome. Hum Reprod 2014; 29:2302-16. [PMID: 25139174 PMCID: PMC4164147 DOI: 10.1093/humrep/deu187] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022] Open
Abstract
STUDY QUESTION What are the consequences of polycystic ovary syndrome (PCOS) pathology and metformin-pretreatment in vivo in women with PCOS on the metabolism and steroid production of follicular phenotype- and long-term cultured-granulosa cells (GC)? SUMMARY ANSWER PCOS pathology significantly compromised glucose metabolism and the progesterone synthetic capacity of follicular- and long-term cultured-GCs and the metabolic impact of PCOS on GC function was alleviated by metformin-pretreatment in vivo. WHAT IS KNOWN ALREADY Granulosa cells from women with PCOS have been shown to have an impaired insulin-stimulated glucose uptake and lactate production in vitro. However, these results were obtained by placing GCs in unphysiological conditions in culture medium containing high glucose and insulin concentrations. Moreover, existing data on insulin-responsive steroid production in vitro by PCOS GCs vary. STUDY DESIGN, SIZE AND DURATION Case-control experimental research comparing glucose uptake, pyruvate and lactate production and progesterone production in vitro by GCs from three aetiological groups, all undergoing IVF; healthy control women (Control, n = 12), women with PCOS treated with metformin in vivo (Metformin, n = 8) and women with PCOS not exposed to metformin (PCOS, n = 8). The study was conducted over a period of 3 years between 2007 and 2010. PARTICIPANTS/MATERIALS, SETTING, METHODS Rotterdam criteria were used for the diagnosis of PCOS; all subjects were matched for age, BMI and baseline FSH. Individual patient cultures were undertaken with cells incubated in a validated, physiological, serum-free culture medium containing doses of 0–6 mM glucose and 0–100 ng/ml insulin for 6 h and 144 h to quantify the impact of treatments on acute and long-term metabolism, respectively, and progesterone production. The metabolite content of spent media was measured using spectrophotometric plate reader assay. The progesterone content of spent media was measured by enzyme-linked immunosorbent assay. Viable GC number was quantified after 144 h of culture by the vital dye Neutral Red uptake assay. MAIN RESULTS AND THE ROLE OF CHANCE Granulosa cells from women with PCOS pathology revealed reduced pyruvate production and preferential lactate production in addition to their reduced glucose uptake during cultures (P < 0.05). Metformin pretreatment alleviated this metabolic lesion (P < 0.05) and enhanced cell proliferation in vitro (P < 0.05), but cells retained a significantly reduced capacity for progesterone synthesis compared with controls (P < 0.05). LIMITATIONS, REASONS FOR CAUTION Although significant treatment effects were detected in this small cohort, further studies are required to underpin the molecular mechanisms of the effect of metformin on GCs. WIDER IMPLICATIONS OF THE FINDINGS The individual patient culture strategy combined with multifactorial experimental design strengthens the biological interpretation of the data. Collectively, these results support the notion that there is an inherent impairment in progesterone biosynthetic capacity of the GCs from women with PCOS. The positive, acute metabolic effect and the negative long-term steroidogenic effect on GCs following metformin exposure in vivo may have important implications for follicular development and luteinized GC function when the drug is used in clinical practice. STUDY FUNDING/COMPETING INTEREST(S) No competing interests. This work was supported by the UK Medical Research Council Grant Reference number G0800250.
Collapse
Affiliation(s)
- D Maruthini
- The Leeds Centre for Reproductive Medicine, Seacroft Hospital, York Road, Leeds LS14 6UH, UK
| | - S E Harris
- Division of Reproduction and Early Development, Leeds Institute for Genetics, Health and Therapeutics, University of Leeds, Clarendon Way, Leeds LS2 9JT, UK
| | - J H Barth
- Department of Clinical Biochemistry, Leeds Teaching Hospitals NHS Trust, Leeds General Infirmary, Great George Street, Leeds LS1 3EX, UK
| | - A H Balen
- The Leeds Centre for Reproductive Medicine, Seacroft Hospital, York Road, Leeds LS14 6UH, UK
| | - B K Campbell
- Division of Human Development at Nottingham University Hospitals NHS Trust, Department of Obstetrics and Gynaecology, Queen's Medical Centre Campus, Nottingham NG7 2UH, UK
| | - H M Picton
- Division of Reproduction and Early Development, Leeds Institute for Genetics, Health and Therapeutics, University of Leeds, Clarendon Way, Leeds LS2 9JT, UK
| |
Collapse
|
31
|
Tamura I, Ohkawa Y, Sato T, Suyama M, Jozaki K, Okada M, Lee L, Maekawa R, Asada H, Sato S, Yamagata Y, Tamura H, Sugino N. Genome-wide analysis of histone modifications in human endometrial stromal cells. Mol Endocrinol 2014; 28:1656-69. [PMID: 25073104 DOI: 10.1210/me.2014-1117] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Dramatic changes of gene expressions occur in human endometrial stromal cells (ESCs) during decidualization. The changes in gene expression are associated with changes of chromatin structure, which are regulated by histone modifications. Here we investigated genome-wide changes in histone modifications associated with decidualization in human ESCs using chromatin immunoprecipitation combined with next-generation sequencing. ESCs were incubated with estradiol and medroxyprogesterone acetate for 14 days to induce decidualization. The chromatin immunoprecipitation-sequence data showed that induction of decidualization increased H3K27ac and H3K4me3 signals in many genomic regions but decreased in only a few regions. Most of the H3K27ac-increased regions (80%) and half of the H3K4me3-increased regions were located in the distal promoter regions (more than 3 kb upstream or downstream of the transcription start site). RNA sequence showed that induction of decidualization up-regulated 881 genes, 223 of which had H3K27ac- or H3K4me3-increased regions in the proximal and distal promoter regions. Induction of decidualization increased the mRNA levels of these genes more than it increased the mRNA levels of genes without H3K27ac- or H3K4me3-increased regions. Pathway analysis revealed that up-regulated genes with the H3K27ac- or H3K4me3-increased regions were associated with the insulin signaling, which may be involved in glucose uptake that is necessary for ESCs to undergo decidualization. These results show that histone modification statuses on a genome-wide basis change in human ESCs during decidualization. The main changes of histone modifications are increases of H3K27ac and H3K4me3 in both the proximal and distal promoter regions, which are involved in the up-regulation of gene expression that occurs during decidualization.
Collapse
Affiliation(s)
- Isao Tamura
- Department of Obstetrics and Gynecology (I.T., K.J., M.O., L.L., R.M., H.A., S.S., Y.Y., H.T., N.S.), Yamaguchi University Graduate School of Medicine, Ube 755-8505, Japan; Department of Advanced Initiative Medicine (Y.O.), Faculty of Medicine, Kyushu University, Higashi-ku, Fukuoka, 812-8582, Japan; and Division of Bioinformatics (T.S., M.S.), Medical Institute of Bioregulation, Kyushu University, Fukuoka, 812-8582, Japan
| | | | | | | | | | | | | | | | | | | | | | | | | |
Collapse
|
32
|
Ben-Shlomo I, Younis JS. Basic research in PCOS: are we reaching new frontiers? Reprod Biomed Online 2014; 28:669-83. [DOI: 10.1016/j.rbmo.2014.02.011] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2013] [Revised: 12/21/2013] [Accepted: 02/12/2014] [Indexed: 01/05/2023]
|
33
|
Seli E, Babayev E, Collins SC, Nemeth G, Horvath TL. Minireview: Metabolism of female reproduction: regulatory mechanisms and clinical implications. Mol Endocrinol 2014; 28:790-804. [PMID: 24678733 DOI: 10.1210/me.2013-1413] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Abstract
Female fertility is highly dependent on successful regulation of energy metabolism. Central processes in the hypothalamus monitor the metabolic state of the organism and, together with metabolic hormones, drive the peripheral availability of energy for cellular functions. In the ovary, the oocyte and neighboring somatic cells of the follicle work in unison to achieve successful metabolism of carbohydrates, amino acids, and lipids. Metabolic disturbances such as anorexia nervosa, obesity, and diabetes mellitus have clinically important consequences on human reproduction. In this article, we review the metabolic determinants of female reproduction and their role in infertility.
Collapse
Affiliation(s)
- Emre Seli
- Department of Obstetrics, Gynecology, and Reproductive Sciences (E.S., E.B., S.C., T.L.H.), Yale School of Medicine, New Haven, Connecticut 06520; Department of Obstetrics and Gynecology (G.N., T.L.H.), University of Szeged, Faculty of Medicine, Szeged, Hungary 6701; Department of Comparative Medicine (T.L.H.), Yale School of Medicine, New Haven, Connecticut 06520; and the Department of Neurobiology (T.L.H.), Yale School of Medicine, New Haven, Connecticut 06520
| | | | | | | | | |
Collapse
|
34
|
Sessions-Bresnahan DR, Carnevale EM. The effect of equine metabolic syndrome on the ovarian follicular environment. J Anim Sci 2014; 92:1485-94. [PMID: 24663160 DOI: 10.2527/jas.2013-7275] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Obesity in many species is associated with reduced fertility and increased risk of metabolic disorders and cardiovascular dysfunction in offspring. Equine metabolic syndrome (EMS) is associated with obesity and characterized by insulin resistance, decreased adiponectin, and elevated insulin, leptin, and pro-inflammatory cytokines. These alterations can potentially disrupt follicular development and impair fertility. We hypothesized that mares with EMS have an altered follicular environment when compared to their normal counterparts, affecting gene regulation for follicle and oocyte maturation. Samples were collected from light-horse mares (11 to 27 yr) in a clinical assisted reproductive program. Mares were screened based on phenotype. Insulin sensitivity was determined by using two proxies, the reciprocal of the square root of insulin (RISQI) and the modified insulin-to-glucose ratio (MIRG). Insulin resistant mares (RISQI < 0.32 and MIRG > 5.50) were allocated to the EMS group (n = 8), and the remaining mares were considered normal controls (CON, n = 12). Follicular fluid (FF) and granulosa cells (GC) from preovulatory follicles were aspirated 24 ± 2 h after administration of a GnRH analog (SucroMate, 0.9 to 1.4 mg, i.m.) and hCG (Chorion, 1500 to 2000 IU, i.v.). After an overnight fast, blood was collected on the morning of follicle aspiration to evaluate serum concentrations of insulin, leptin, adiponectin, and inflammatory cytokines. Expression of 32 genes related to metabolism, follicle maturation, and oocyte maturation were assessed in GC. Concentrations of insulin, leptin, adiponectin, and cytokines were highly correlated between serum and FF (P < 0.001). Insulin was lower (P < 0.001) in serum and FF of CON compared to EMS, but leptin and IL1β tended (P = 0.07 and P = 0.10, respectively) to be lower in FF of CON than EMS. Tumor necrosis factor-α in serum and FF was lower (P < 0.07 and P < 0.05, respectively) in CON than EMS. Conversely, adiponectin was higher (P < 0.05) in serum and FF in CON versus EMS. In GC from CON when compared to EMS, gene expression for epiregulin was elevated (P < 0.05) and tissue inhibitor of matrix metalloproteinase-2 tended to be lower (P = 0.09). Our findings demonstrate that the intrafollicular environment in the mare is influenced by metabolic disease, consistent with findings in other species. Influences on follicular development, oocyte maturation, and subsequent offspring by perturbations due to metabolic disease need further study.
Collapse
Affiliation(s)
- D R Sessions-Bresnahan
- Equine Reproduction Laboratory, Department of Biomedical Sciences, Colorado State University, Fort Collins 80523
| | | |
Collapse
|
35
|
Zhang CM, Zhao Y, Li R, Yu Y, Yan LY, Li L, Liu NN, Liu P, Qiao J. Metabolic heterogeneity of follicular amino acids in polycystic ovary syndrome is affected by obesity and related to pregnancy outcome. BMC Pregnancy Childbirth 2014; 14:11. [PMID: 24410809 PMCID: PMC3897995 DOI: 10.1186/1471-2393-14-11] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Accepted: 01/06/2014] [Indexed: 01/21/2023] Open
Abstract
Background Polycystic ovary syndrome (PCOS) is a heterogeneous endocrine disorder frequently accompanied by obesity and by insulin resistance, and patients with this syndrome suffer from infertility and poor pregnancy outcome. Disturbances in plasma amino acid (AA) metabolism have been implicated in women with PCOS. However, direct evidence on follicular AA metabolic profiles in PCOS patients and their relationship with pregnancy outcome is sparse. Methods We conducted a prospective study in 63 PCOS patients and 48 controls in the Division of Reproductive Center, Peking University Third Hospital. Follicular AA levels were measured by the liquid chromatography-tandem mass spectrometric method, and the results were analyzed based on different grouping criteria. Results The levels of aromatic amino acid (AAA) increased in PCOS patients independent of obesity (P < 0.05), whereas the levels of branched-chain amino acid (BCAA), glutamic acid, phenylalanine, alanine, and arginine increased with body mass index irrespective of the PCOS status (all P < 0.05). In addition, compared with non insulin resistant-PCOS patients and controls, insulin resistant-PCOS group had higher levels of leucine, valine and glutamic acid (all P < 0.05). In PCOS group, aspartic acid and serine levels were elevated in pregnant patients compared with the non-pregnant subjects (both P < 0.05). Moreover, the levels of BCAA and valine were higher in the non-pregnant group than in the pregnant group (both P < 0.05). The pregnancy rate (45.00%) of subjects with elevated BCAA level was significantly lower than that (66.67%) in control subjects (P = 0.036) at a BCAA cutoff value of 239.10 μM, while the abortion rate was much higher (33.33% versus 2.78%, P = 0.004). Conclusions Both PCOS and obesity were accompanied by follicular AA metabolic disturbances, with obesity exerting a more pronounced effect on AA metabolic profiles. The disruptions in specific AAs in the follicular fluid might account for the inferior pregnancy outcome in obese patients and increased risk of abortion in PCOS patients.
Collapse
Affiliation(s)
| | | | | | | | | | | | | | | | - Jie Qiao
- Reproductive Medical Center, Department of Obstetrics and Gynecology, Peking University Third Hospital, No, 49 Huayuan North Road, Beijing, Haidian District, 100191, People's Republic of China.
| |
Collapse
|
36
|
Glucose predictability, blood capillary permeability, and glucose utilization rate in subcutaneous, skeletal muscle, and visceral fat tissues. Comput Biol Med 2013; 43:1680-6. [DOI: 10.1016/j.compbiomed.2013.08.008] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/14/2012] [Revised: 08/12/2013] [Accepted: 08/15/2013] [Indexed: 11/23/2022]
|
37
|
Wang XL, Wang K, Zhao S, Wu Y, Gao H, Zeng SM. Oocyte-secreted growth differentiation factor 9 inhibits BCL-2-interacting mediator of cell death-extra long expression in porcine cumulus cell. Biol Reprod 2013; 89:56. [PMID: 23843241 DOI: 10.1095/biolreprod.113.108365] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
Oocyte-secreted factors (OSFs) maintain the low incidence of cumulus cell apoptosis. In this report, we described that the presence of oocytes suppressed the expression of proapoptotic protein BCL-2-interacting mediator of cell death-extra long (BIMEL) in porcine cumulus cells. Atretic (terminal deoxynucleotidyl transferase dUTP nick end labeling-positive) cumulus cells strongly expressed BIMEL protein. The healthy cumulus- oocyte complex exhibited a low BIMEL expression in cumulus cell while the removal of oocyte led to an about 2.5-fold (P < 0.5) increased expression in oocytectomized complex (OOX). Coculturing OOXs with denuded oocytes decreased BIMEL expression to the normal level. The similar expression pattern could also be achieved in OOXs treated with exogenous recombinant mouse growth differentiation factor 9 (GDF9), a well-characterized OSF. This inhibitory action of GDF9 was prevented by the addition of a phosphatidylinositol 3-kinase (PI3K) inhibitor LY294002. Luciferase assay further demonstrated that BIM gene expression was forkhead box O3a (FOXO3a)-dependent because mutation of FOXO3a-binding site on the BIM promoter inhibited luciferase activities. Moreover, the activity of BIM promoter encompassing the FOXO3a-binding site could be regulated by GDF9. Additionally, we found that GDF9 elevated the levels of phosphorylated AKT and FOXO3a, and this process was independent of the SMAD signal pathway. Taken together, we concluded that OSFs, particularly GDF9, maintained the low level of BIMEL expression in cumulus cell through activation of the PI3K/FOXO3a pathway.
Collapse
Affiliation(s)
- Xian-Long Wang
- Laboratory of Animal Embryonic Biotechnology, College of Animal Science and Technology, China Agricultural University, Beijing, China
| | | | | | | | | | | |
Collapse
|
38
|
A novel approach to quantifying ovarian cell lipid content and lipid accumulation in vitro by confocal microscopy in lean women undergoing ovarian stimulation for in vitro fertilization (IVF). J Assist Reprod Genet 2013; 30:733-40. [PMID: 23512091 DOI: 10.1007/s10815-013-9976-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Accepted: 03/06/2013] [Indexed: 01/21/2023] Open
Abstract
PURPOSE To quantify intracellular lipid levels in cumulus cells (CCs) and mural granulosa cells (MGCs) of lean women undergoing gonadotropin therapy for in vitro fertilization (IVF), based upon different cell preparation methods. METHODS CCs and MGCs from 16 lean women undergoing ovarian stimulation for IVF were studied. Cells were pooled by cell type, with each type of cell separated into two groups for determination of initial lipid content (Method 1) and subsequent lipid accumulation in vitro (Method 2). Cells for initial lipid content were immediately fixed at the time of the oocyte retrieval with 4% paraformaldehyde in suspension, while those for subsequent lipid accumulation in vitro were cultured for 4 h with 5% fetal calf serum and then fixed. Cells were treated with lipid fluorescent dye BODIPY® FL C16 and nuclear marker DAPI. Intracellular lipid was quantified by confocal microscopy, using ImageJ software analysis. RESULTS There was no significant effect of cell type (P = 0.2) or cell type-cell preparation method interaction (P = 0.8) on cell area (Method 1: CC 99.7 ± 5.1, MGC 132.8 ± 5.8; Method 2: CC 221.9 ± 30.4, MGC 265.1 ± 48.5 μm(2)). The mean area of all cells combined was significantly less for cells prepared by Method 1 (116.2 ± 4.9 μm(2)) vs. Method 2 (243.5 ± 22.5 μm(2), P < 0.00005). Intracellular lipid level, however, was significantly altered by cell preparation method (P < 0.05; cell preparation method-cell type interaction, P < 0.00001). Initial lipid content was significantly lower in CC (74.5 ± 9.3) than MGC (136.3 ± 16.7 fluorescence/cell area, P < 0.00005), while subsequent lipid accumulation in vitro was significantly higher in CC (154.0 ± 9.1) than MGC (104.6 ± 9.9 fluorescence/cell area, P < 0.00001). The relatively diminished initial CC lipid content compared to subsequent CC lipid accumulation in vitro (P < 0.00001), and the opposite pattern for MGC (P < 0.05), significantly lowered the CC/MGC lipid ratio in Method 1 (0.55 ± 0.04) vs. Method 2 (1.58 ± 0.10, P < 0.00001). CONCLUSIONS Differential uptake or utilization of lipid by CC and MGC occurs during oocyte maturation and steroidogenesis, respectively, with the amount of lipid present in ovarian cells a function of both the follicular microenvironment at the time of the oocyte retrieval and the capacity of these cells to accumulate lipid in vitro over time.
Collapse
|
39
|
Auclair S, Uzbekov R, Elis S, Sanchez L, Kireev I, Lardic L, Dalbies-Tran R, Uzbekova S. Absence of cumulus cells during in vitro maturation affects lipid metabolism in bovine oocytes. Am J Physiol Endocrinol Metab 2013; 304:E599-613. [PMID: 23321473 DOI: 10.1152/ajpendo.00469.2012] [Citation(s) in RCA: 64] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
Cumulus cells (CC) surround the oocyte and are coupled metabolically through regulation of nutrient intake. CC removal before in vitro maturation (IVM) decreases bovine oocyte developmental competence without affecting nuclear meiotic maturation. The objective was to investigate the influence of CC on oocyte cytoplasmic maturation in relation to energy metabolism. IVM with either cumulus-enclosed (CEO) or -denuded (DO) oocytes was performed in serum-free metabolically optimized medium. Transmission electron microscopy revealed different distribution of membrane-bound vesicles and lipid droplets between metaphase II DO and CEO. By Nile Red staining, a significant reduction in total lipid level was evidenced in DO. Global transcriptomic analysis revealed differential expression of genes regulating energy metabolism, transcription, and translation between CEO and DO. By Western blot, fatty acid synthase (FAS) and hormone-sensitive phospholipase (HSL) proteins were detected in oocytes and in CC, indicating a local lipogenesis and lypolysis. FAS protein was significantly less abundant in DO that in CEO and more highly expressed in CC than in the oocytes. On the contrary, HSL protein was more abundant in oocytes than in CC. In addition, active Ser⁵⁶³-phosphorylated HSL was detected in the oocytes only after IVM, and its level was similar in CEO and DO. In conclusion, absence of CC during IVM affected lipid metabolism in the oocyte and led to suboptimal cytoplasmic maturation. Thus, CC may influence the oocyte by orienting the consumption of nutritive storage via regulation of local fatty acid synthesis and lipolysis to provide energy for maturation.
Collapse
Affiliation(s)
- Sylvain Auclair
- UMR85 Physiologie de la Reproduction et des Comportements, Institut National de la Recherche Agronomique, Nouzilly, France
| | | | | | | | | | | | | | | |
Collapse
|
40
|
Abstract
During oogenesis in mammals, the germ line interacts with ovarian somatic cells as follicles assemble, grow, ovulate, and die. As a result, these interactions with granulosa cells determine germ cell fate as the oocyte undergoes hypertrophy, the final stages of meiosis, and preparations required for successful fertilization. Over the past 15 years, investigators using a range of experimental approaches have uncovered the existence of multiple modalities for signaling between the oocyte and companion granulosa cells that play essential and sometimes overlapping roles during the growth and maturative phases of oogenesis. Five modalities of intercellular signaling are considered in the context of regulating oocyte gene expression, metabolism, spatial patterning, and the cell cycle. While some forms of signaling predominate at specific stages of oogenesis, such as during the assembly of primordial follicles, it is apparent that combinations of modalities work in concert to control events associated with ovulation when both nuclear and cytoplasmic maturation occur. A final key feature of the signaling platform underscoring the protracted process of oogenesis is the existence of negative and positive feedback loops designed to coordinate the tempo of oogenesis and folliculogenesis at key developmental transitions.
Collapse
Affiliation(s)
- Lynda K McGinnis
- Department of Molecular and Integrative Physiology, Kansas University Medical Center, Kansas City, Missouri, USA
| | | | | |
Collapse
|
41
|
Luzzo KM, Wang Q, Purcell SH, Chi M, Jimenez PT, Grindler N, Schedl T, Moley KH. High fat diet induced developmental defects in the mouse: oocyte meiotic aneuploidy and fetal growth retardation/brain defects. PLoS One 2012; 7:e49217. [PMID: 23152876 PMCID: PMC3495769 DOI: 10.1371/journal.pone.0049217] [Citation(s) in RCA: 254] [Impact Index Per Article: 21.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2012] [Accepted: 10/04/2012] [Indexed: 11/19/2022] Open
Abstract
BACKGROUND Maternal obesity is associated with poor outcomes across the reproductive spectrum including infertility, increased time to pregnancy, early pregnancy loss, fetal loss, congenital abnormalities and neonatal conditions. Furthermore, the proportion of reproductive-aged woman that are obese in the population is increasing sharply. From current studies it is not clear if the origin of the reproductive complications is attributable to problems that arise in the oocyte or the uterine environment. METHODOLOGY/PRINCIPAL FINDINGS We examined the developmental basis of the reproductive phenotypes in obese animals by employing a high fat diet mouse model of obesity. We analyzed very early embryonic and fetal phenotypes, which can be parsed into three abnormal developmental processes that occur in obese mothers. The first is oocyte meiotic aneuploidy that then leads to early embryonic loss. The second is an abnormal process distinct from meiotic aneuploidy that also leads to early embryonic loss. The third is fetal growth retardation and brain developmental abnormalities, which based on embryo transfer experiments are not due to the obese uterine environment but instead must be from a defect that arises prior to the blastocyst stage. CONCLUSIONS/SIGNIFICANCE Our results suggest that reproductive complications in obese females are, at least in part, from oocyte maternal effects. This conclusion is consistent with IVF studies where the increased pregnancy failure rate in obese women returns to the normal rate if donor oocytes are used instead of autologous oocytes. We postulate that preconceptional weight gain adversely affects pregnancy outcomes and fetal development. In light of our findings, preconceptional counseling may be indicated as the preferable, earlier target for intervention in obese women desiring pregnancy and healthy outcomes.
Collapse
Affiliation(s)
- Kerri M. Luzzo
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
| | - Qiang Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
| | - Scott H. Purcell
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
| | - Maggie Chi
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
| | - Patricia T. Jimenez
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
| | - Natalia Grindler
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
| | - Tim Schedl
- Washington University School of Medicine, Department of Genetics, St. Louis, Missouri, United States of America
| | - Kelle H. Moley
- Washington University School of Medicine, Department of Obstetrics and Gynecology, St. Louis, Missouri, United States of America
- * E-mail:
| |
Collapse
|
42
|
Yang Y, Wolfram J, Boom K, Fang X, Shen H, Ferrari M. Hesperetin impairs glucose uptake and inhibits proliferation of breast cancer cells. Cell Biochem Funct 2012; 31:374-9. [PMID: 23042260 DOI: 10.1002/cbf.2905] [Citation(s) in RCA: 78] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2012] [Revised: 09/02/2012] [Accepted: 09/06/2012] [Indexed: 01/05/2023]
Abstract
The flavanone hesperetin is known to decrease basal glucose uptake, although the inhibitory mechanism is largely unknown. Here, we used MDA-MB-231 breast cancer cells to investigate the molecular pathways affected by hesperetin. The results indicate that the suppression of glucose uptake is caused by the down-regulation of glucose transporter 1 (GLUT1). Hesperetin was also found to inhibit insulin-induced glucose uptake through impaired cell membrane translocation of glucose transporter 4 (GLUT4). In addition, the phosphorylation of the insulin receptor-beta subunit (IR-beta) and Akt was suppressed. Hesperetin also decreased cellular proliferation, which is likely due to the inhibition of glucose uptake. Cancer cells are highly dependent on glucose and hesperetin may, therefore, have potential application as an anticancer agent.
Collapse
Affiliation(s)
- Yong Yang
- Department of Nanomedicine, The Methodist Hospital Research Institute, Houston, TX, USA
| | | | | | | | | | | |
Collapse
|
43
|
Adastra KL, Frolova AI, Chi MM, Cusumano D, Bade M, Carayannopoulos MO, Moley KH. Slc2a8 deficiency in mice results in reproductive and growth impairments. Biol Reprod 2012; 87:49. [PMID: 22649075 DOI: 10.1095/biolreprod.111.097675] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
Abstract
SLC2A8, also known as GLUT8, is a facilitative glucose transporter expressed in the testis, brain, liver, heart, uterus, ovary, and fat. In this study we examined the effect of Slc2a8 deficiency on mouse gamete, preimplantation embryo, and implantation phenotype, as well as postnatal growth and physiology. For this model, the transcriptional start site and exons 1-4 were targeted and a lack of protein expression was confirmed by Western immunoblot. Oocytes obtained from Slc2a8(-/-) mice demonstrated abnormal metabolism and ATP production. In addition, deletion of Slc2a8 resulted in impaired decidualization, a critical step in the differentiation of endometrial stromal cells (ESCs), necessary for implantation. This indicates a role for SLC2A8 in decidualization, which is supported by Slc2a8 mRNA expression in both mouse and human ESCs, which increases dramatically in response to hormonal changes occurring during the process of implantation. Ovarian transplantation studies confirm that lack of SLC2A8 affects both the embryo and the implantation processes. This phenotype leads to decreased litter size, and smaller pups at weaning that continue to display an abnormally small growth phenotype into adulthood. The Slc2a8 null mice display decreased body fat by magnetic resonance imaging, and, interestingly, they are resistant to a diet high in fat and carbohydrates.
Collapse
Affiliation(s)
- Katie L Adastra
- Department of Obstetrics and Gynecology, Washington University School of Medicine, St. Louis, Missouri, USA
| | | | | | | | | | | | | |
Collapse
|
44
|
Abstract
Glucose is an essential nutrient for mammalian cells. Emerging evidence suggests that glucose within the oocyte regulates meiotic maturation. However, it remains controversial as to whether, and if so how, glucose enters oocytes within cumulus-oocyte complexes (COCs). We used a fluorescent glucose derivative (6-NBDG) to trace glucose transport within live mouse COCs and employed inhibitors of glucose transporters (GLUTs) and gap junction proteins to examine their distinct roles in glucose uptake by cumulus cells and the oocyte. We showed that fluorescent glucose enters both cumulus-enclosed and denuded oocytes. Treating COCs with GLUT inhibitors leads to simultaneous decreases in glucose uptake in cumulus cells and the surrounded oocyte but no effect on denuded oocytes. Pharmacological blockade of of gap junctions between the oocyte and cumulus cells significantly inhibited fluorescent glucose transport to oocytes. Moreover, we find that both in vivo hyperglycemic environment and in vitro high-glucose culture increase free glucose levels in oocytes via gap junctional channels. These findings reveal an intercellular pathway for glucose transport into oocytes: glucose is taken up by cumulus cells via the GLUT system and then transferred into the oocyte through gap junctions. This intercellular pathway may partly mediate the effects of high-glucose condition on oocyte quality.
Collapse
Affiliation(s)
- Qiang Wang
- State Key Laboratory of Reproductive Medicine, Nanjing Medical University, Nanjing, China
| | | | | | | |
Collapse
|
45
|
Russo VC, Higgins S, Werther GA, Cameron FJ. Effects of Fluctuating Glucose Levels on Neuronal Cells In Vitro. Neurochem Res 2012; 37:1768-82. [DOI: 10.1007/s11064-012-0789-y] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2012] [Revised: 04/12/2012] [Accepted: 04/24/2012] [Indexed: 12/29/2022]
|