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Avendaño MS, Perdices-Lopez C, Guerrero-Ruiz Y, Ruiz-Pino F, Rodriguez-Sanchez AB, Sanchez-Tapia MJ, Sobrino V, Pineda R, Barroso A, Correa-Sáez A, Lara-Chica M, Fernandez-Garcia JC, García-Redondo AB, Hernanz R, Ruiz-Cruz M, Garcia-Galiano D, Pitteloud N, Calzado MA, Briones AM, Vázquez MJ, Tena-Sempere M. The evolutionary conserved miR-137/325 tandem mediates obesity-induced hypogonadism and metabolic comorbidities by repressing hypothalamic kisspeptin. Metabolism 2024:155932. [PMID: 38729600 DOI: 10.1016/j.metabol.2024.155932] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2024] [Revised: 05/01/2024] [Accepted: 05/02/2024] [Indexed: 05/12/2024]
Abstract
BACKGROUND Obesity-induced hypogonadism (OIH) is a prevalent, but often neglected condition in men, which aggravates the metabolic complications of overweight. While hypothalamic suppression of Kiss1-encoded kisspeptin has been suggested to contribute to OIH, the molecular mechanisms for such repression in obesity, and the therapeutic implications thereof, remain unknown. METHODS A combination of bioinformatic, expression and functional analyses was implemented, assessing the role of the evolutionary-conserved miRNAs, miR-137 and miR-325, in mediating obesity-induced suppression of hypothalamic kisspeptin, as putative mechanism of central hypogonadism and metabolic comorbidities. The implications of such miR-137/325-kisspeptin interplay for therapeutic intervention in obesity were also explored using preclinical OIH models. RESULTS MiR-137/325 repressed human KISS1 3'-UTR in-vitro and inhibited hypothalamic kisspeptin content in male rats, while miR-137/325 expression was up-regulated, and Kiss1/kisspeptin decreased, in the medio-basal hypothalamus of obese rats. Selective over-expression of miR-137 in Kiss1 neurons reduced Kiss1/ kisspeptin and partially replicated reproductive and metabolic alterations of OIH in lean mice. Conversely, interference of the repressive actions of miR-137/325 selectively on Kiss1 3'-UTR in vivo, using target-site blockers (TSB), enhanced kisspeptin content and reversed central hypogonadism in obese rats, together with improvement of glucose intolerance, insulin resistance and cardiovascular and inflammatory markers, despite persistent exposure to obesogenic diet. Reversal of OIH by TSB miR-137/325 was more effective than chronic kisspeptin or testosterone treatments in obese rats. CONCLUSIONS Our data disclose that the miR-137/325-Kisspeptin repressive interaction is a major player in the pathogenesis of obesity-induced hypogonadism and a putative druggable target for improved management of this condition and its metabolic comorbidities in men suffering obesity. SIGNIFICANCE STATEMENT Up to half of the men suffering obesity display also central hypogonadism, an often neglected complication of overweight that can aggravate the clinical course of obesity and its complications. The mechanisms for such obesity-induced hypogonadism remain poorly defined. We show here that the evolutionary conserved miR137/miR325 tandem centrally mediates obesity-induced hypogonadism via repression of the reproductive-stimulatory signal, kisspeptin; this may represent an amenable druggable target for improved management of hypogonadism and other metabolic complications of obesity.
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Affiliation(s)
- María S Avendaño
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; Hospital Universitario Reina Sofía, Córdoba, Spain.
| | - Cecilia Perdices-Lopez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Yolanda Guerrero-Ruiz
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Francisco Ruiz-Pino
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Ana B Rodriguez-Sanchez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain
| | - María J Sanchez-Tapia
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Verónica Sobrino
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Rafael Pineda
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Alexia Barroso
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Alejandro Correa-Sáez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Maribel Lara-Chica
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - José C Fernandez-Garcia
- CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain; Department of Endocrinology and Nutrition, Regional University Hospital of Málaga, Instituto de Investigación Biomédica de Málaga (IBIMA), Málaga, Spain
| | - Ana B García-Redondo
- Department of Pharmacology, Universidad Autónoma de Madrid, Madrid, Spain; Instituto Investigación Hospital Universitario La Paz (IdiPaz), Madrid, Spain; CIBER Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - Raquel Hernanz
- Instituto Investigación Hospital Universitario La Paz (IdiPaz), Madrid, Spain; CIBER Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain; Department of Basic Health Sciences, Universidad Rey Juan Carlos, Madrid, Spain
| | - Miguel Ruiz-Cruz
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - David Garcia-Galiano
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain
| | - Nelly Pitteloud
- Department of Service of Endocrinology, Diabetes, and Metabolism, Faculty of Biology and Medicine, University of Lausanne, Lausanne University Hospital, Lausanne, Switzerland
| | - Marco A Calzado
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Ana M Briones
- Department of Pharmacology, Universidad Autónoma de Madrid, Madrid, Spain; Instituto Investigación Hospital Universitario La Paz (IdiPaz), Madrid, Spain; CIBER Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, Madrid, Spain
| | - María J Vázquez
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; Hospital Universitario Reina Sofía, Córdoba, Spain
| | - Manuel Tena-Sempere
- Instituto Maimónides de Investigación Biomédica de Córdoba (IMIBIC), Córdoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Córdoba, Cordoba, Spain; Hospital Universitario Reina Sofía, Córdoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición (CIBEROBN), Instituto de Salud Carlos III, Córdoba, Spain.
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Iwata K, Ogata R, Sato M, Matsuda F, Ishii H, Ozawa H. Short-term depletion of plasma estrogen affects hypothalamic kisspeptin-neurokinin B-dynorphin A neurons, gonadotrophs, and pulsatile luteinizing hormone secretion in female rats. Peptides 2023; 160:170929. [PMID: 36574861 DOI: 10.1016/j.peptides.2022.170929] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2022] [Revised: 12/04/2022] [Accepted: 12/23/2022] [Indexed: 12/25/2022]
Abstract
Kisspeptin-neurokinin B-dynorphin A (KNDy) neurons in the arcuate nucleus (ARC) regulate pulsatile luteinizing hormone (LH) secretion. These neurons express estrogen receptors and are negatively regulated by estrogen. This study aimed to determine whether estrogen supplementation after short-term ovariectomy-induced estrogen depletion has different effects on KNDy neurons depending on the timing of the supplementation. To decrease endogenous estradiol (E2) for a short time, adult female rats received a tube filled with E2 one week after ovariectomy and utilized it one week later (O1w + E). From the results of immunohistochemistry, the response to E2 was attenuated in KNDy neurons of O1w + E rats. Enlarged LH-secreting cells in the anterior pituitary were found in O1w + E rats; however, such enlarged LH cells were not found in ones without previous short-term E2 depletion. From the analysis of LH pulses, plasma LH levels were increased in O1w + E rats relative to ones without previous short-term E2 depletion. These results suggested that once endogenous sex steroids were depleted, the response to E2 in hypothalamic KNDy neurons did not fully recover in one week. Thus, short-term sex steroid depletion due to gonadectomy could alter the response to the sex steroids in KNDy neurons even though the period without sex steroids is only one week, and the alteration is likely to affect plasma hormone levels.
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Affiliation(s)
- Kinuyo Iwata
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan.
| | - Risako Ogata
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan
| | - Marimo Sato
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Fuko Matsuda
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo 113-8657, Japan
| | - Hirotaka Ishii
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan
| | - Hitoshi Ozawa
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Tokyo 113-8602, Japan; Faculty of Health Science, Bukkyo Univeristy, Kyoto, 604-8418, Japan
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Ueta Y. Sex-related differences in obesity - role of the kisspeptin-neurokinin B-dynorphin A (KNDy) neurons. Peptides 2023; 159:170907. [PMID: 36423708 DOI: 10.1016/j.peptides.2022.170907] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Affiliation(s)
- Yoichi Ueta
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, 1-1 Iseigaoka, Yahatanishi-ku, Kitakyushu 807- 8555, Japan.
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Chen X, Huang L, Cui L, Xiao Z, Xiong X, Chen C. Sodium-glucose cotransporter 2 inhibitor ameliorates high fat diet-induced hypothalamic-pituitary-ovarian axis disorders. J Physiol 2022; 600:4549-4568. [PMID: 36048516 PMCID: PMC9826067 DOI: 10.1113/jp283259] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2022] [Accepted: 08/16/2022] [Indexed: 01/11/2023] Open
Abstract
High-fat diet (HFD) consumption is known to be associated with ovulatory disorders among women of reproductive age. Previous studies in animal models suggest that HFD-induced microglia activation contributes to hypothalamic inflammation. This causes the dysfunction of the hypothalamic-pituitary-ovarian (HPO) axis, leading to subfertility. Sodium-glucose cotransporter 2 (SGLT2) inhibitors are a novel class of lipid-soluble antidiabetic drugs that target primarily the early proximal tubules in kidney. Recent evidence revealed an additional expression site of SGLT2 in the central nervous system (CNS), indicating a promising role of SGLT2 inhibitors in the CNS. In type 2 diabetes patients and rodent models, SGLT2 inhibitors exhibit neuroprotective properties through reduction of oxidative stress, alleviation of cerebral atherosclerosis and suppression of microglia-induced neuroinflammation. Furthermore, clinical observations in patients with polycystic ovary syndrome (PCOS) demonstrated that SGLT2 inhibitors ameliorated patient anthropometric parameters, body composition and insulin resistance. Therefore, it is of importance to explore the central mechanism of SGLT2 inhibitors in the recovery of reproductive function in patients with PCOS and obesity. Here, we review the hypothalamic inflammatory mechanisms of HFD-induced microglial activation, with a focus on the clinical utility and possible mechanism of SGLT2 inhibitors in promoting reproductive fitness.
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Affiliation(s)
- Xiaolin Chen
- Department of EndocrinologyRenmin Hospital of Wuhan UniversityWuhanChina
| | - Lili Huang
- School of Biomedical ScienceUniversity of QueenslandBrisbaneQueenslandAustralia
| | - Ling Cui
- Department of Reproduction and InfertilityChengdu Women's and Children's Central HospitalSchool of MedicineUniversity of Electronic Science and Technology of ChinaChengduChina
| | - Zhuoni Xiao
- Reproductive Medical CenterRenmin Hospital of Wuhan UniversityWuhanChina
| | - Xiaoxing Xiong
- Department of NeurosurgeryRenmin Hospital of Wuhan UniversityWuhanChina
| | - Chen Chen
- School of Biomedical ScienceUniversity of QueenslandBrisbaneQueenslandAustralia
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Gonnella F, Konstantinidou F, Di Berardino C, Capacchietti G, Peserico A, Russo V, Barboni B, Stuppia L, Gatta V. A Systematic Review of the Effects of High-Fat Diet Exposure on Oocyte and Follicular Quality: A Molecular Point of View. Int J Mol Sci 2022; 23:8890. [PMID: 36012154 PMCID: PMC9408717 DOI: 10.3390/ijms23168890] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2022] [Revised: 08/03/2022] [Accepted: 08/04/2022] [Indexed: 12/19/2022] Open
Abstract
Worldwide, infertility affects between 10 and 15% of reproductive-aged couples. Female infertility represents an increasing health issue, principally in developing countries, as the current inclinations of delaying pregnancy beyond 35 years of age significantly decrease fertility rates. Female infertility, commonly imputable to ovulation disorders, can be influenced by several factors, including congenital malformations, hormonal dysfunction, and individual lifestyle choices, such as smoking cigarettes, stress, drug use and physical activity. Moreover, diet-related elements play an important role in the regulation of ovulation. Modern types of diet that encourage a high fat intake exert a particularly negative effect on ovulation, affecting the safety of gametes and the implantation of a healthy embryo. Identifying and understanding the cellular and molecular mechanisms responsible for diet-associated infertility might help clarify the confounding multifaceted elements of infertility and uncover novel, potentially curative treatments. In this view, this systematic revision of literature will summarize the current body of knowledge of the potential effect of high-fat diet (HFD) exposure on oocyte and follicular quality and consequent female reproductive function, with particular reference to molecular mechanisms and pathways. Inflammation, oxidative stress, gene expression and epigenetics represent the main mechanisms associated with mammal folliculogenesis and oogenesis.
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Abstract
Obesity, the growing pandemic of the 21st century, is associated with multiple organ dysfunction, either by a direct increase in fatty organ content or by indirect modifications related to general metabolic changes driven by a specific increase in biologic products. The pituitary gland is not protected against such a situation. Different hypothalamic-pituitary axes experience functional modifications initially oriented to an adaptive situation that, with years of obesity, turn to maladaptive dynamics that contribute to perpetuating obesity and specific symptoms of their hormonal nature. This paper reviews the recent knowledge on obesity-related pituitary dysfunction and its pathogenic mechanisms and discusses potential therapeutic actions aimed at contributing to ameliorating the complex treatment of severe cases of obesity.
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Affiliation(s)
- Sabina Ruiz
- Department of Endocrinology and Nutrition, Germans Trias i Pujol University Hospital and Research Institute, Badalona, Catalonia, Spain
| | - Federico Vázquez
- Department of Endocrinology and Nutrition, Germans Trias i Pujol University Hospital and Research Institute, Badalona, Catalonia, Spain
| | - Silvia Pellitero
- Department of Endocrinology and Nutrition, Germans Trias i Pujol University Hospital and Research Institute, Badalona, Catalonia, Spain
| | - Manel Puig-Domingo
- Department of Endocrinology and Nutrition, Germans Trias i Pujol University Hospital and Research Institute, Badalona, Catalonia, Spain
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Enomoto H, Iwata K, Matsumoto K, Otsuka M, Morita A, Ozawa H. Hypothalamic KNDy neuron expression in streptozotocin-induced diabetic female rats. J Endocrinol 2022; 253:39-51. [PMID: 35084363 PMCID: PMC8942341 DOI: 10.1530/joe-21-0169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/13/2022] [Accepted: 01/27/2022] [Indexed: 11/08/2022]
Abstract
Kisspeptin neurons, i.e. KNDy neurons, in the arcuate nucleus (ARC) coexpress neurokinin B and dynorphin and regulate gonadotropin-releasing hormone/luteinizing hormone (LH) pulses. Because it remains unclear whether these neurons are associated with reproductive dysfunction in diabetic females, we examined the expression of KNDy neurons detected by histochemistry in streptozotocin (STZ)-induced diabetic female rats 8 weeks after STZ injection. We also evaluated relevant metabolic parameters - glucose, 3-hydroxybutyrate, and non-esterified fatty acids - as indicators of diabetes progression. Severe diabetes with hyperglycemia and severe ketosis suppressed the mRNA expression of KNDy neurons, resulting in low plasma LH levels and persistent diestrus. In moderate diabetes with hyperglycemia and moderate ketosis, kisspeptin-immunoreactive cells and plasma LH levels were decreased, while the mRNA expression of KNDy neurons remained unchanged. Mild diabetes with hyperglycemia and slight ketosis did not affect KNDy neurons and plasma LH levels. The number of KNDy cells was strongly and negatively correlated with plasma 3-hydroxybutyrate levels. The vaginal smear analysis showed unclear proestrus in diabetic rats 3-5 days after STZ injection, and the mRNA expression of kisspeptin in the ARC was decreased 2 weeks after STZ injection in severely diabetic rats. Kisspeptin neurons in the anteroventral periventricular nucleus (AVPV), which induce an LH surge, were unaffected at 2 and 8 weeks after STZ injection regardless of the diabetes severity. These results suggest that diabetes mellitus progression in females may negatively affect ARC kisspeptin neurons but not AVPV kisspeptin neurons, implicating a potential role of ARC kisspeptin neurons in menstrual disorder and infertility.
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Affiliation(s)
- Hiroyuki Enomoto
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
- Department of Neurosurgery, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
| | - Kinuyo Iwata
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
- Correspondence should be addressed to K Iwata:
| | - Keisuke Matsumoto
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
| | - Mai Otsuka
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
| | - Akio Morita
- Department of Neurosurgery, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
| | - Hitoshi Ozawa
- Department of Anatomy and Neurobiology, Graduate School of Medicine, Nippon Medical School, Bunkyo-ku, Tokyo, Japan
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Iwasa T, Minato S, Imaizumi J, Yoshida A, Kawakita T, Yoshida K, Yamamoto Y. Effects of low energy availability on female reproductive function. Reprod Med Biol 2021; 21:e12414. [PMID: 34934398 PMCID: PMC8656184 DOI: 10.1002/rmb2.12414] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2021] [Accepted: 09/03/2021] [Indexed: 01/15/2023] Open
Abstract
Background It is known that metabolic and nutritional disturbances induce reproductive dysfunction in females. The main cause of these alterations is reduced gonadotrophin‐releasing hormone (GnRH) secretion from the hypothalamus, and the underlying mechanisms have gradually been elucidated. Methods The present review summarizes current knowledge about the effects of nutrition/metabolism on reproductive functions, especially focusing on the GnRH regulation system. Main findings Various central and peripheral factors are involved in the regulation of GnRH secretion, and alterations in their activity combine to affect GnRH neurons. Satiety‐related factors, i.e., leptin, insulin, and alpha‐melanocyte‐stimulating hormone, directly and indirectly stimulate GnRH secretion, whereas orexigenic factors, i.e., neuropeptide Y, Agouti‐related protein, orexin, and ghrelin, attenuate GnRH secretion. In addition, kisspeptin, which is a potent positive regulator of GnRH, expression is reduced by metabolic and nutritional disturbances. Conclusion These neuroendocrine systems may be defensive mechanisms, which help organisms to survive adverse conditions by temporarily suppressing reproduction.
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Affiliation(s)
- Takeshi Iwasa
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Saki Minato
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Junki Imaizumi
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Atsuko Yoshida
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Takako Kawakita
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Kanako Yoshida
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
| | - Yuri Yamamoto
- Department of Obstetrics and Gynecology Graduate School of Biomedical Sciences Tokushima University Tokushima Japan
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Ozawa H. Kisspeptin neurons as an integration center of reproductive regulation: Observation of reproductive function based on a new concept of reproductive regulatory nervous system. Reprod Med Biol 2021; 21:e12419. [PMID: 34934400 PMCID: PMC8656200 DOI: 10.1002/rmb2.12419] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2021] [Revised: 09/20/2021] [Accepted: 09/24/2021] [Indexed: 11/29/2022] Open
Abstract
Background Regulation of the reproductive system has been explained by the actions and feedback of gonadotropin releasing hormone‐luteinizing hormone/follicle stimulating hormone (GnRH‐LH/FSH) ‐sex steroids; however, the discovery of kisspeptin neurons and a kisspeptin‐GnRH‐LH/FSH axis has prompted this regulation to be reviewed. Methods We investigated changes in kisspeptin neurons and associated changes in the hypothalamic‐pituitary‐gonadal (HPG) axis under various situations and experimental conditions using histochemical methods. Main findings (Results) Kisspeptin neurons play an important role in receiving and integrating information from internal and external environmental factors and communicating it to the conventional HPG axis. Conclusion The recently described Kisspeptin‐GnRH‐LH/FSH‐gonad system regulates reproductive function via mechanisms that until recently were not completely understood.
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Affiliation(s)
- Hitoshi Ozawa
- Department of Anatomy and Neurobiology Graduate School of Medicine Nippon Medical School Tokyo Japan
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Fang P, She Y, Zhao J, Yan J, Yu X, Jin Y, Wei Q, Zhang Z, Shang W. Emerging roles of kisspeptin/galanin in age-related metabolic disease. Mech Ageing Dev 2021; 199:111571. [PMID: 34517021 DOI: 10.1016/j.mad.2021.111571] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2021] [Revised: 07/08/2021] [Accepted: 09/07/2021] [Indexed: 12/11/2022]
Abstract
Age is a major risk factor for developing metabolic diseases such as obesity and diabetes. There is an unprecedented rise in obesity and type 2 diabetes in recent decades. A convincing majority of brain-gut peptides are associated with a higher risk to develop metabolic disorders, and may contribute to the pathophysiology of age-related metabolic diseases. Accumulating basic studies revealed an intriguing role of kisspeptin and galanin involved in the amelioration of insulin resistance in different ways. In patients suffered from obesity and diabetes a significant, sex-related changes in the plasma kisspeptin and galanin levels occurred. Kisspeptin is anorexigenic to prevent obesity, its level is negatively correlative with obesity and insulin resistance. While galanin is appetitive to stimulate food intake and body weight, its level is positively correlative with obesity, HOMA-IR and glucose/triglyceride concentration. In turn, kisspeptin and galanin also distinctly increase glucose uptake and utilization as well as energy expenditure. This article reviews recent evidence dealing with the role of kisspeptin and galanin in the pathophysiology of age-related metabolic diseases. It should be therefore taken into account that the targeted modulation of those peptidergic signaling may be potentially helpful in the future treatment of age-related metabolic diseases.
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Affiliation(s)
- Penghua Fang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China; Department of Physiology, Nanjing University of Chinese Medicine Hanlin College, Taizhou, 225300, China.
| | - Yuqing She
- Department of Endocrinology, Pukou Branch of Jiangsu People's Hospital, Nanjing, 210023, China
| | - Juan Zhao
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Jing Yan
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Xizhong Yu
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Yu Jin
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Qingbo Wei
- Key Laboratory of Acupuncture and Medicine Research of Minister of Education, Nanjing University of Chinese Medicine, Nanjing, 210023, China
| | - Zhenwen Zhang
- Department of Endocrinology, Clinical Medical College, Yangzhou University, Yangzhou, 225001, China.
| | - Wenbin Shang
- Key Laboratory for Metabolic Diseases in Chinese Medicine, First College of Clinical Medicine, Nanjing University of Chinese Medicine, Nanjing, 210023, China.
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