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Abbara A, Dhillo WS. Astrocytes: a star emerges in the control of reproductive hormones. J Clin Invest 2024; 134:e182669. [PMID: 39087475 PMCID: PMC11290961 DOI: 10.1172/jci182669] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/02/2024] Open
Abstract
Kisspeptin is an essential neuropeptide sitting at the apex of the hypothalamo-pituitary-gonadal (HPG) endocrine axis to regulate gonadotropin-releasing hormone (GnRH) neurons and downstream reproductive hormones. Kisspeptin neurons integrate feedback from sex steroids facilitating regulation of the menstrual cycle and mediate the effects of metabolic stressors on the reproductive axis. In this issue of the JCI, Torres and colleagues describe another pathway for kisspeptin signaling in astrocytes to influence GnRH neuronal output. Astrocytes had kisspeptin receptors that activated canonical intracellular signaling pathways to constrain the magnitude of kisspeptin-induced GnRH neuronal stimulation. Additionally, the appositions between kisspeptin and GnRH neurons were dynamic during the ovarian cycle, with astrocyte kisspeptin signaling proposed as a putative modulator of this neuroplasticity. Importantly, astrocyte kisspeptin signaling also mediated susceptibility to metabolic stressors and the development of obesity-induced hypogonadism, underscoring the physiological and pathological importance of this pathway and revealing the importance of nonneuronal signaling in reproductive health.
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Affiliation(s)
- Ali Abbara
- Section of Endocrinology and Investigative Medicine, Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, United Kingdom
- Department of Endocrinology, Imperial College Healthcare NHS Trust, London, United Kingdom
| | - Waljit S. Dhillo
- Section of Endocrinology and Investigative Medicine, Division of Diabetes, Endocrinology and Metabolism, Imperial College London, London, United Kingdom
- Department of Endocrinology, Imperial College Healthcare NHS Trust, London, United Kingdom
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2
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Patel B, Koysombat K, Mills EG, Tsoutsouki J, Comninos AN, Abbara A, Dhillo WS. The Emerging Therapeutic Potential of Kisspeptin and Neurokinin B. Endocr Rev 2024; 45:30-68. [PMID: 37467734 PMCID: PMC10765167 DOI: 10.1210/endrev/bnad023] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 06/13/2023] [Accepted: 07/11/2023] [Indexed: 07/21/2023]
Abstract
Kisspeptin (KP) and neurokinin B (NKB) are neuropeptides that govern the reproductive endocrine axis through regulating hypothalamic gonadotropin-releasing hormone (GnRH) neuronal activity and pulsatile GnRH secretion. Their critical role in reproductive health was first identified after inactivating variants in genes encoding for KP or NKB signaling were shown to result in congenital hypogonadotropic hypogonadism and a failure of pubertal development. Over the past 2 decades since their discovery, a wealth of evidence from both basic and translational research has laid the foundation for potential therapeutic applications. Beyond KP's function in the hypothalamus, it is also expressed in the placenta, liver, pancreas, adipose tissue, bone, and limbic regions, giving rise to several avenues of research for use in the diagnosis and treatment of pregnancy, metabolic, liver, bone, and behavioral disorders. The role played by NKB in stimulating the hypothalamic thermoregulatory center to mediate menopausal hot flashes has led to the development of medications that antagonize its action as a novel nonsteroidal therapeutic agent for this indication. Furthermore, the ability of NKB antagonism to partially suppress (but not abolish) the reproductive endocrine axis has supported its potential use for the treatment of various reproductive disorders including polycystic ovary syndrome, uterine fibroids, and endometriosis. This review will provide a comprehensive up-to-date overview of the preclinical and clinical data that have paved the way for the development of diagnostic and therapeutic applications of KP and NKB.
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Affiliation(s)
- Bijal Patel
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
| | - Kanyada Koysombat
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust, 72 Du Cane Rd, London, W12 0HS, UK
| | - Edouard G Mills
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust, 72 Du Cane Rd, London, W12 0HS, UK
| | - Jovanna Tsoutsouki
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
| | - Alexander N Comninos
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust, 72 Du Cane Rd, London, W12 0HS, UK
| | - Ali Abbara
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust, 72 Du Cane Rd, London, W12 0HS, UK
| | - Waljit S Dhillo
- Section of Investigative Medicine, Department of Metabolism, Digestion and Reproduction, Imperial College School of Medicine, Imperial College London, London, W12 0NN, UK
- Department of Diabetes and Endocrinology, Imperial College Healthcare NHS Trust, 72 Du Cane Rd, London, W12 0HS, UK
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3
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Aasif A, Alam R, Ahsan H, Khan MM, Khan A, Khan S. The role of kisspeptin in the pathogenesis of a polycystic ovary syndrome. Endocr Regul 2023; 57:292-303. [PMID: 38127687 DOI: 10.2478/enr-2023-0032] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/23/2023] Open
Abstract
Hypothalamic-pituitary gonadal (HPG) axis is responsible for the development and regulation of the female reproductive system. In polycystic ovary syndrome (PCOS), there is a disturbance in the HPG axis. Kisspeptin, a neuropeptide produced by the KISS1 gene, plays a vital role in the regulation of HPG axis by binding with its receptors KISS1R/GPR54, and stimulates gonadotropin secretion from the hypothalamus into pituitary to release luteinizing hormone (LH) and follicle stimulating hormone (FSH). Polymorphisms or mutations in the KISS1 gene can cause disturbance in the kisspeptin signaling pathway and is thought to disrupt HPG axis. Altered signaling of kisspeptin can cause abnormal secretion of GnRH pulse, which leads to increased LH/FSH ratio, thereby affecting androgen levels and ovulation. The increased levels of androgen worsen the symptoms of PCOS. In the present article, we review the molecular physiology and pathology of kisspeptin and how it is responsible for the development of PCOS. The goal of this review article is to provide an overview and metabolic profile of kisspeptin in PCOS patients and the expression of kisspeptin in PCOS animal models. In the present article, we also review the molecular physiology and pathology of kisspeptin and how it is responsible for the development of PCOS.
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Affiliation(s)
- Adiba Aasif
- 1Department of Biochemistry, Integral Institute of Medical Sciences and Research, Lucknow, India
| | - Roshan Alam
- 1Department of Biochemistry, Integral Institute of Medical Sciences and Research, Lucknow, India
| | - Haseeb Ahsan
- 2Department of Biochemistry, Faculty of Dentistry, Jamia Millia Islamia, New Delhi, India
| | - Mohammad Mustufa Khan
- 3Department of Basic Medical Sciences, Integral Institute of Allied Health Sciences and Research, Integral University, Lucknow, India
| | - Arshiya Khan
- 4Department of Obstetrics and Gynecology, Integral Institute of Medical Sciences and Research, Lucknow, India
| | - Saba Khan
- 1Department of Biochemistry, Integral Institute of Medical Sciences and Research, Lucknow, India
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4
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Guzman S, Dragan M, Kwon H, de Oliveira V, Rao S, Bhatt V, Kalemba KM, Shah A, Rustgi VK, Wang H, Bech PR, Abbara A, Izzi-Engbeaya C, Manousou P, Guo JY, Guo GL, Radovick S, Dhillo WS, Wondisford FE, Babwah AV, Bhattacharya M. Targeting hepatic kisspeptin receptor ameliorates nonalcoholic fatty liver disease in a mouse model. J Clin Invest 2022; 132:145889. [PMID: 35349482 PMCID: PMC9106350 DOI: 10.1172/jci145889] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Accepted: 03/23/2022] [Indexed: 01/27/2023] Open
Abstract
Nonalcoholic fatty liver disease (NAFLD), the most common liver disease, has become a silent worldwide pandemic. The incidence of NAFLD correlates with the rise in obesity, type 2 diabetes, and metabolic syndrome. A hallmark featureof NAFLD is excessive hepatic fat accumulation or steatosis, due to dysregulated hepatic fat metabolism, which can progress to nonalcoholic steatohepatitis (NASH), fibrosis, and cirrhosis. Currently, there are no approved pharmacotherapies to treat this disease. Here, we have found that activation of the kisspeptin 1 receptor (KISS1R) signaling pathway has therapeutic effects in NAFLD. Using high-fat diet-fed mice, we demonstrated that a deletion of hepatic Kiss1r exacerbated hepatic steatosis. In contrast, enhanced stimulation of KISS1R protected against steatosis in wild-type C57BL/6J mice and decreased fibrosis using a diet-induced mouse model of NASH. Mechanistically, we found that hepatic KISS1R signaling activates the master energy regulator, AMPK, to thereby decrease lipogenesis and progression to NASH. In patients with NAFLD and in high-fat diet-fed mice, hepatic KISS1/KISS1R expression and plasma kisspeptin levels were elevated, suggesting a compensatory mechanism to reduce triglyceride synthesis. These findings establish KISS1R as a therapeutic target to treat NASH.
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Affiliation(s)
- Stephania Guzman
- Department of Medicine, Robert Wood Johnson Medical School, and,Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, New Jersey, USA
| | | | - Hyokjoon Kwon
- Department of Medicine, Robert Wood Johnson Medical School, and
| | | | - Shivani Rao
- Department of Medicine, Robert Wood Johnson Medical School, and
| | - Vrushank Bhatt
- Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA
| | | | - Ankit Shah
- Department of Medicine, Robert Wood Johnson Medical School, and
| | - Vinod K. Rustgi
- Department of Medicine, Robert Wood Johnson Medical School, and
| | - He Wang
- Department of Pathology and Laboratory Medicine, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA
| | - Paul R. Bech
- Section of Endocrinology and Investigative Medicine and
| | - Ali Abbara
- Section of Endocrinology and Investigative Medicine and
| | | | - Pinelopi Manousou
- Department of Metabolism, Digestion and Reproduction, Imperial College London, London, United Kingdom
| | - Jessie Y. Guo
- Department of Medicine, Robert Wood Johnson Medical School, and,Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA
| | - Grace L. Guo
- Department of Pharmacology and Toxicology, School of Pharmacy, and
| | - Sally Radovick
- Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA
| | | | | | - Andy V. Babwah
- Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers University, New Brunswick, New Jersey, USA.,Child Health Institute of New Jersey, New Brunswick, New Jersey, USA
| | - Moshmi Bhattacharya
- Department of Medicine, Robert Wood Johnson Medical School, and,Rutgers Center for Lipid Research, New Jersey Institute for Food, Nutrition, and Health, Rutgers University, New Brunswick, New Jersey, USA.,Rutgers Cancer Institute of New Jersey, New Brunswick, New Jersey, USA.,Child Health Institute of New Jersey, New Brunswick, New Jersey, USA
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5
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Chemerinski A, Liu C, Morelli SS, Babwah AV, Douglas NC. Mouse Cre drivers: tools for studying disorders of the human female neuroendocrine-reproductive axis†. Biol Reprod 2022; 106:835-853. [PMID: 35084017 PMCID: PMC9113446 DOI: 10.1093/biolre/ioac012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2021] [Revised: 12/14/2021] [Accepted: 01/17/2022] [Indexed: 01/29/2023] Open
Abstract
Benign disorders of the human female reproductive system, such primary ovarian insufficiency and polycystic ovary syndrome are associated with infertility and recurrent miscarriage, as well as increased risk of adverse health outcomes, including cardiovascular disease and type 2 diabetes. For many of these conditions, the contributing molecular and cellular processes are poorly understood. The overarching similarities between mice and humans have rendered mouse models irreplaceable in understanding normal physiology and elucidating pathological processes that underlie disorders of the female reproductive system. The utilization of Cre-LoxP recombination technology, which allows for spatial and temporal control of gene expression, has identified the role of numerous genes in development of the female reproductive system and in processes, such as ovulation and endometrial decidualization, that are required for the establishment and maintenance of pregnancy in mammals. In this comprehensive review, we provide a detailed overview of Cre drivers with activity in the neuroendocrine-reproductive axis that have been used to study disruptions in key intracellular signaling pathways. We first summarize normal development of the hypothalamus, pituitary, ovary, and uterus, highlighting similarities and differences between mice and humans. We then describe human conditions resulting from abnormal development and/or function of the organ. Finally, we describe loss-of-function models for each Cre driver that elegantly recapitulate some key features of the human condition and are associated with impaired fertility. The examples we provide illustrate use of each Cre driver as a tool for elucidating genetic and molecular underpinnings of reproductive dysfunction.
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Affiliation(s)
- Anat Chemerinski
- Correspondence: Rutgers New Jersey Medical School, 185 South Orange Avenue, MSB E561, Newark, NJ 07103, USA. Tel: 301-910-6800; Fax: 973-972-4574. E-mail:
| | | | - Sara S Morelli
- Department of Obstetrics, Gynecology and Reproductive Health, Rutgers Biomedical and Health Sciences, Newark, NJ, USA
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6
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Schaefer J, Vilos AG, Vilos GA, Bhattacharya M, Babwah AV. Uterine kisspeptin receptor critically regulates epithelial estrogen receptor α transcriptional activity at the time of embryo implantation in a mouse model. Mol Hum Reprod 2021; 27:gaab060. [PMID: 34524460 PMCID: PMC8786495 DOI: 10.1093/molehr/gaab060] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 09/07/2021] [Indexed: 12/14/2022] Open
Abstract
Embryo implantation failure is a major cause of infertility in women of reproductive age and a better understanding of uterine factors that regulate implantation is required for developing effective treatments for female infertility. This study investigated the role of the uterine kisspeptin receptor (KISS1R) in the molecular regulation of implantation in a mouse model. To conduct this study, a conditional uterine knockout (KO) of Kiss1r was created using the Pgr-Cre (progesterone receptor-CRE recombinase) driver. Reproductive profiling revealed that while KO females exhibited normal ovarian function and mated successfully to stud males, they exhibited significantly fewer implantation sites, reduced litter size and increased neonatal mortality demonstrating that uterine KISS1R is required for embryo implantation and a healthy pregnancy. Strikingly, in the uterus of Kiss1r KO mice on day 4 (D4) of pregnancy, the day of embryo implantation, KO females exhibited aberrantly elevated epithelial ERα (estrogen receptor α) transcriptional activity. This led to the temporal misexpression of several epithelial genes [Cftr (Cystic fibrosis transmembrane conductance regulator), Aqp5 (aquaporin 5), Aqp8 (aquaporin 8) and Cldn7 (claudin 7)] that mediate luminal fluid secretion and luminal opening. As a result, on D4 of pregnancy, the lumen remained open disrupting the final acquisition of endometrial receptivity and likely accounting for the reduction in implantation events. Our data clearly show that uterine KISS1R negatively regulates ERα signaling at the time of implantation, in part by inhibiting ERα overexpression and preventing detrimentally high ERα activity. To date, there are no reports on the regulation of ERα by KISS1R; therefore, this study has uncovered an important and powerful regulator of uterine ERα during early pregnancy.
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Affiliation(s)
- Jennifer Schaefer
- Laboratory of Human Growth and Reproductive Development, Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
- School of Graduate Studies, Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
| | - Angelos G Vilos
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - George A Vilos
- Division of Reproductive Endocrinology and Infertility, Department of Obstetrics and Gynaecology, Schulich School of Medicine and Dentistry, Western University, London, Ontario, Canada
| | - Moshmi Bhattacharya
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
- Child Health Institute of New Jersey, New Brunswick, NJ, USA
| | - Andy V Babwah
- Laboratory of Human Growth and Reproductive Development, Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, USA
- School of Graduate Studies, Joint Graduate Program in Toxicology, Rutgers, The State University of New Jersey, Piscataway, NJ, USA
- Child Health Institute of New Jersey, New Brunswick, NJ, USA
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7
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Clinical Potential of Kisspeptin in Reproductive Health. Trends Mol Med 2021; 27:807-823. [PMID: 34210598 DOI: 10.1016/j.molmed.2021.05.008] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 05/28/2021] [Accepted: 05/29/2021] [Indexed: 12/31/2022]
Abstract
Kisspeptins are a family of hypothalamic neuropeptides that are essential for the regulation of reproductive physiology. Their importance in reproductive health became apparent in 2003, when loss-of-function variants in the gene encoding the kisspeptin receptor were reported to result in isolated congenital hypogonadotropic hypogonadism (CHH). It has since been ascertained that hypothalamic kisspeptin neurons regulate gonadotropin-releasing hormone (GnRH) secretion to thus stimulate the remainder of the reproductive endocrine axis. In this review, we discuss genetic variants that affect kisspeptin receptor signaling, summarize data on KISS1R agonists, and posit possible clinical uses of native and synthetic kisspeptin receptor agonists for the investigation and treatment of reproductive disorders.
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8
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Kumar M, Sarma DK, Shubham S, Kumawat M, Verma V, Prakash A, Tiwari R. Environmental Endocrine-Disrupting Chemical Exposure: Role in Non-Communicable Diseases. Front Public Health 2020; 8:553850. [PMID: 33072697 PMCID: PMC7541969 DOI: 10.3389/fpubh.2020.553850] [Citation(s) in RCA: 137] [Impact Index Per Article: 34.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2020] [Accepted: 08/18/2020] [Indexed: 01/09/2023] Open
Abstract
The exponential growth of pollutant discharges into the environment due to increasing industrial and agricultural activities is a rising threat for human health and a biggest concern for environmental health globally. Several synthetic chemicals, categorized as potential environmental endocrine-disrupting chemicals (EDCs), are evident to affect the health of not only livestock and wildlife but also humankind. In recent years, human exposure to environmental EDCs has received increased awareness due to their association with altered human health as documented by several epidemiological and experimental studies. EDCs are associated with deleterious effects on male and female reproductive health; causes diabetes, obesity, metabolic disorders, thyroid homeostasis and increase the risk of hormone-sensitive cancers. Sewage effluents are a major source of several EDCs, which eventually reach large water bodies and potentially contaminate the drinking water supply. Similarly, water storage material such as different types of plastics also leaches out EDCs in drinking Water. Domestic wastewater containing pharmaceutical ingredients, metals, pesticides and personal care product additives also influences endocrine activity. These EDCs act via various receptors through a variety of known and unknown mechanisms including epigenetic modification. They differ from classic toxins in several ways such as low-dose effect, non-monotonic dose and trans-generational effects. This review aims to highlight the hidden burden of EDCs on human health and discusses the non-classical toxic properties of EDCs in an attempt to understand the magnitude of the exposome on human health. Present data on the environmental EDCs advocate that there may be associations between human exposure to EDCs and several undesirable health outcomes that warrants further human bio-monitoring of EDCs.
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Affiliation(s)
- Manoj Kumar
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Devojit Kumar Sarma
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Swasti Shubham
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Manoj Kumawat
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Vinod Verma
- Department of Stem Cell Research Sanjay Gandhi Post Graduate Institute of Medical Sciences, Lucknow, India
| | - Anil Prakash
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
| | - Rajnarayan Tiwari
- National Institute for Research in Environmental Health, Indian Council of Medical Research, Bhopal, India
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9
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Babwah AV. The wonderful and masterful G protein-coupled receptor (GPCR): A focus on signaling mechanisms and the neuroendocrine control of fertility. Mol Cell Endocrinol 2020; 515:110886. [PMID: 32574585 DOI: 10.1016/j.mce.2020.110886] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 05/08/2020] [Accepted: 05/20/2020] [Indexed: 12/18/2022]
Abstract
Human GnRH deficiency, both clinically and genetically, is a heterogeneous disorder comprising of congenital GnRH deficiency with anosmia (Kallmann syndrome), or with normal olfaction [normosmic idiopathic hypogonadotropic hypogonadism (IHH)], and adult-onset hypogonadotropic hypogonadism. Our understanding of the neural mechanisms underlying GnRH secretion and GnRH signaling continues to increase at a rapid rate and strikingly, the heterotrimeric guanine nucleotide-binding protein (G protein)-coupled receptors (GPCRs) continue to emerge as essential players in these processes. GPCRs were once viewed as binary on-off switches, where in the "on" state they are bound to their Gα protein, but now we understand that view is overly simplistic and does not adequately characterize GPCRs. Instead, GPCRs have emerged as masterful signaling molecules exploiting different physical conformational states of itself to elicit an array of downstream signaling events via their G proteins and the β-arrestins. The "one receptor-multiple signaling conformations" model is likely an evolved strategy that can be used to our advantage as researchers have shown that targeting specific receptor conformations via biased ligands is proving to be a powerful tool in the effective treatment of human diseases. Can biased ligands be used to selectively modulate signaling by GPCR regulators of the neuroendocrine axis in the treatment of IHH? As discussed in this review, the grand possibility exists. However, while we are still very far from developing these treatments, this exciting likelihood can happen through a much greater mechanistic understanding of how GPCRs signal within the cell.
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Affiliation(s)
- Andy V Babwah
- Department of Pediatrics, Laboratory of Human Growth and Reproductive Development, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States; Child Health Institute of New Jersey, New Brunswick, NJ, United States.
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10
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Abstract
The significance of KISS1 goes beyond its original discovery as a metastasis suppressor. Its function as a neuropeptide involved in diverse physiologic processes is more well studied. Enthusiasm regarding KISS1 has cumulated in clinical trials in multiple fields related to reproduction and metabolism. But its cancer therapeutic space is unsettled. This review focuses on collating data from cancer and non-cancer fields in order to understand shared and disparate signaling that might inform clinical development in the cancer therapeutic and biomarker space. Research has focused on amino acid residues 68-121 (kisspeptin 54), binding to the KISS1 receptor and cellular responses. Evidence and counterevidence regarding this canonical pathway require closer look at the covariates so that the incredible potential of KISS1 can be realized.
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Affiliation(s)
- Thuc Ly
- Department of Cancer Biology, Kansas University Medical Center, 3901 Rainbow Blvd. - MS1071, Kansas City, KS, 66160, USA
| | - Sitaram Harihar
- Department of Genetic Engineering, SRM Institute of Science and Technology, Kattankulathur, Chennai, Tamil Nadu, 603203, India
| | - Danny R Welch
- Department of Cancer Biology, Kansas University Medical Center, 3901 Rainbow Blvd. - MS1071, Kansas City, KS, 66160, USA.
- University of Kansas Cancer Center, 3901 Rainbow Blvd., Kansas City, KS, 66160, USA.
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11
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Di Giorgio NP, Bizzozzero-Hiriart M, Libertun C, Lux-Lantos V. Unraveling the connection between GABA and kisspeptin in the control of reproduction. Reproduction 2020; 157:R225-R233. [PMID: 30844750 DOI: 10.1530/rep-18-0527] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2018] [Accepted: 03/07/2019] [Indexed: 12/20/2022]
Abstract
Neuroendocrine control of reproduction involves the interplay of various factors that become active at some point along development. GnRH is the main neurohormone controlling reproduction and among the most important inputs modulating GnRH synthesis/secretion are GABA and kisspeptins. These interactions of GABA and kisspeptin in the control of GnRH secretion can take place by the presence of the receptors of both factors on the GnRH neuron or alternatively by the actions of GABA on kisspeptin neurons and/or the actions of kisspeptin on GABA neurons. Kisspeptin acts on the Kiss1R, a seven transmembrane domain, Gαq/11-coupled receptor that activates phospholipase C, although some Gαq/11-independent pathways in mediating part of the effects of Kiss1R activation have also been proposed. GABA acts through two kinds of receptors, ionotropic GABAA/C receptors involving a chloride channel and associated with fast inhibitory/stimulatory conductance and metabotropic GABAB receptors (GABABR) that are Gi/0 protein linked inducing late slow hyperpolarization. In this review, we aim to summarize the different ways in which these two actors, kisspeptin and GABA, interact to modulate GnRH secretion across the reproductive lifespan.
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Affiliation(s)
- Noelia P Di Giorgio
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | | | - Carlos Libertun
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina.,Departamento de Fisiología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Victoria Lux-Lantos
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
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12
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Bowdridge EC, Abukabda AB, Engles KJ, McBride CR, Batchelor TP, Goldsmith WT, Garner KL, Friend S, Nurkiewicz TR. Maternal Engineered Nanomaterial Inhalation During Gestation Disrupts Vascular Kisspeptin Reactivity. Toxicol Sci 2020; 169:524-533. [PMID: 30843041 DOI: 10.1093/toxsci/kfz064] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
Maternal engineered nanomaterial (ENM) inhalation is associated with uterine vascular impairments and endocrine disruption that may lead to altered gestational outcomes. We have shown that nano-titanium dioxide (nano-TiO2) inhalation impairs endothelium-dependent uterine arteriolar dilation in pregnant rats. However, the mechanism underlying this dysfunction is unknown. Due to its role as a potent vasoconstrictor and essential reproductive hormone, we examined how kisspeptin is involved in nano-TiO2-induced vascular dysfunction and placental efficiency. Pregnant Sprague Dawley rats were exposed (gestational day [GD] 10) to nano-TiO2 aerosols (cumulative dose = 525 ± 16 μg; n = 8) or sham exposed (n = 6) and sacrificed on GD 20. Plasma was collected to evaluate estrogen (E2), progesterone (P4), prolactin (PRL), corticosterone (CORT), and kisspeptin. Pup and placental weights were measured to calculate placental efficiency (grams fetus/gram placental). Additionally, pressure myography was used to determine uterine artery vascular reactivity. Contractile responses were assessed via cumulative additions of kisspeptin (1 × 10-9 to 1 × 10-4 M). Estrogen was decreased at GD 20 in exposed (11.08 ± 3 pg/ml) versus sham-control rats (66.97 ± 3 pg/ml), whereas there were no differences in P4, PRL, CORT, or kisspeptin. Placental weights were increased in exposed (0.99 ± 0.03 g) versus sham-control rats (0.70 ± 0.04 g), whereas pup weights (4.01 ± 0.47 g vs 4.15 ± 0.15 g) and placental efficiency (4.5 ± 0.2 vs 6.4 ± 0.5) were decreased in exposed rats. Maternal ENM inhalation exposure augmented uterine artery vasoconstrictor responses to kisspeptin (91.2%±2.0 vs 98.6%±0.10). These studies represent initial evidence that pulmonary maternal ENM exposure perturbs the normal gestational endocrine vascular axis via a kisspeptin-dependent mechanism, and decreased placental, which may adversely affect health outcomes.
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Affiliation(s)
- Elizabeth C Bowdridge
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | - Alaeddin B Abukabda
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | | | - Carroll R McBride
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | - Thomas P Batchelor
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | - William T Goldsmith
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | - Krista L Garner
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506
| | - Sherri Friend
- Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown 26505, West Virginia
| | - Timothy R Nurkiewicz
- Department of Physiology and Pharmacology.,Center for Inhalation Toxicology, Toxicology Working Group, West Virginia University School of Medicine, 26506.,Health Effects Laboratory Division, National Institute for Occupational Safety and Health, Morgantown 26505, West Virginia
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13
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Di Giorgio NP, Bizzozzero Hiriart M, Surkin PN, López PV, Bourguignon NS, Dorfman VB, Bettler B, Libertun C, Lux-Lantos V. Multiple failures in the lutenising hormone surge generating system in GABAB1KO female mice. J Neuroendocrinol 2019; 31:e12765. [PMID: 31269532 DOI: 10.1111/jne.12765] [Citation(s) in RCA: 3] [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: 04/11/2018] [Revised: 05/28/2019] [Accepted: 06/25/2019] [Indexed: 12/13/2022]
Abstract
Female mice lacking GABAB receptors, GABAB1KO, show disrupted oestrous cycles, reduced pregnancies and increased hypothalamic Gnrh1 mRNA expression, whereas anteroventral periventricular/periventricular preoptic nucleus (AVPV/PeN) Kiss1 mRNA was not affected. In the present study, we characterise the important components of the gonadotrophic preovulatory surge, aiming to unravel the origin of this reproductive impairment. In GABAB1KO and wild-type (WT) females, we determined: (i) hypothalamic oestrogen receptor (ER)α and β and aromatase mRNA and protein expression; (ii) ovulation index and oestrus serum follicle-stimulating hormone (FSH) and pituitary Gnrh1r expression; (iii) in ovariectomised-oestradiol valerate-treated mice, we evaluated ex vivo hypothalamic gonadotrophin-releasing hormone (GnRH) pulsatility in the presence/absence of kisspeptin (Kiss-10, constant or pulsatile) and oestradiol (constant); and (iv) in ovariectomised-oestradiol silastic capsule-treated mice (proestrous-like environment), we evaluated morning and evening kisspeptin neurone activation (c-Fos+) and serum luteinising homrone (LH). In the medial basal hypothalamus of oestrus GABAB1KOs, aromatase and ERα mRNA and protein were increased, whereas ERβ was decreased. In GABAB1KOs, the ovulation index was decreased together with decreased first oestrus serum FSH and increased pituitary Gnrh1r mRNA. Under constant Kiss-10 stimulation, hypothalamic GnRH pulse frequency did not vary, although GnRH mass/pulse was increased in GABAB1KOs. In WTs, pulsatile Kiss-10 together with constant oestradiol significantly increased GnRH pulsatility, whereas, in GABAB1KOs, oestradiol alone increased GnRH pulsatility and this was reversed by pulsatile Kiss-10 addition. In GABAB1KOs AVPV/PeN kisspeptin neurones were similarly activated (c-Fos+) in the morning and evening, whereas WTs showed the expected, marked evening stimulation. LH correlated with activated kisspeptin cells in WT mice, whereas GABAB1KO mice showed high, similar LH levels both in the morning and evening. Taken together, all of these alterations point to impairment in the trigger of the preovulatory GnRH surge that entails the reproductive alterations described.
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Affiliation(s)
- Noelia P Di Giorgio
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | | | - Pablo N Surkin
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | - Paula V López
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | - Nadia S Bourguignon
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
| | - Verónica B Dorfman
- Centro de Estudios Biomédicos, Biotecnológicos, Ambientales y Diagnóstico (CEBBAD), Universidad Maimónides, Buenos Aires, Argentina
| | | | - Carlos Libertun
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
- Departamento de Fisiología, Facultad de Medicina, Universidad de Buenos Aires, Buenos Aires, Argentina
| | - Victoria Lux-Lantos
- Instituto de Biología y Medicina Experimental (IBYME-CONICET), Buenos Aires, Argentina
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14
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Franssen D, Tena-Sempere M. The kisspeptin receptor: A key G-protein-coupled receptor in the control of the reproductive axis. Best Pract Res Clin Endocrinol Metab 2018; 32:107-123. [PMID: 29678280 DOI: 10.1016/j.beem.2018.01.005] [Citation(s) in RCA: 33] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
The kisspeptin receptor, Kiss1R, also known as Gpr54, is a G protein-coupled receptor (GPCR), deorphanized in 2001, when it was recognized as canonical receptor for the Kiss1-derived peptides, kisspeptins. In 2003, inactivating mutations of Kiss1R gene were first associated to lack of pubertal maturation and hypogonadotropic hypogonadism in humans and rodents. These seminal findings pointed out the previously unsuspected, essential role of Kiss1R and its ligands in control of reproductive maturation and function. This contention has been fully substantiated during the last decade by a wealth of clinical and experimental data, which has documented a fundamental function of the so-called Kiss1/Kiss1R system in the regulation of puberty onset, gonadotropin secretion and ovulation, as well as the metabolic and environmental modulation of fertility. In this review, we provide a succinct summary of some of the most salient facets of Kiss1R, as essential GPCR for the proper maturation and function of the reproductive axis.
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Affiliation(s)
- Delphine Franssen
- Instituto Maimónides de Investigación Biomédica de Cordoba (IMIBIC), 14004, Cordoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14004, Cordoba, Spain; Hospital Universitario Reina Sofia, 14004, Cordoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, 14004, Cordoba, Spain
| | - Manuel Tena-Sempere
- Instituto Maimónides de Investigación Biomédica de Cordoba (IMIBIC), 14004, Cordoba, Spain; Department of Cell Biology, Physiology and Immunology, University of Cordoba, 14004, Cordoba, Spain; Hospital Universitario Reina Sofia, 14004, Cordoba, Spain; CIBER Fisiopatología de la Obesidad y Nutrición, Instituto de Salud Carlos III, 14004, Cordoba, Spain; FiDiPro Program, Institute of Biomedicine, University of Turku, FIN-20520, Turku, Finland.
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15
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Guzman S, Brackstone M, Radovick S, Babwah AV, Bhattacharya MM. KISS1/KISS1R in Cancer: Friend or Foe? Front Endocrinol (Lausanne) 2018; 9:437. [PMID: 30123188 PMCID: PMC6085450 DOI: 10.3389/fendo.2018.00437] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2018] [Accepted: 07/16/2018] [Indexed: 12/19/2022] Open
Abstract
The KISS1 gene encodes KISS1, a protein that is rapidly processed in serum into smaller but biologically active peptides called kisspeptins (KPs). KISS1 and the KPs signal via the G-protein coupled receptor KISS1R. While KISS1 and KPs are recognized as potent positive regulators of the reproductive neuroendocrine axis in mammals, the first reported role for KISS1 was that of metastasis suppression in melanoma. Since then, it has become apparent that KISS1, KPs, and KISS1R regulate the development and progression of several cancers but interestingly, while these molecules act as suppressors of tumorigenesis and metastasis in many cancers, in breast and liver cancer they function as promoters. Thus, they join a small but growing number of molecules that exhibit dual roles in cancer highlighting the importance of studying cancer in context. Given their roles, KISS1, KPs and KISS1R represent important molecules in the development of novel therapies and/or as prognostic markers in treating cancer. However, getting to that point requires a detailed understanding of the relationship between these molecules and different cancers. The purpose of this review is therefore to highlight and discuss the clinical studies that have begun describing this relationship in varying cancer types including breast, liver, pancreatic, colorectal, bladder, and ovarian. An emerging theme from the reviewed studies is that the relationship between these molecules and a given cancer is complex and affected by many factors such as the micro-environment and steroid receptor status of the cancer cell. Our review and discussion of these important clinical studies should serve as a valuable resource in the successful development of future clinical studies.
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Affiliation(s)
- Stephania Guzman
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
- Child Health Institute of New Jersey, New Brunswick, NJ, United States
| | - Muriel Brackstone
- Division of Surgical Oncology, The University of Western Ontario, London, ON, Canada
| | - Sally Radovick
- Child Health Institute of New Jersey, New Brunswick, NJ, United States
- Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers University, The State University of New Jersey, New Brunswick, NJ, United States
| | - Andy V. Babwah
- Child Health Institute of New Jersey, New Brunswick, NJ, United States
- Department of Pediatrics, Robert Wood Johnson Medical School, Rutgers University, The State University of New Jersey, New Brunswick, NJ, United States
| | - Moshmi M. Bhattacharya
- Department of Medicine, Robert Wood Johnson Medical School, Rutgers, The State University of New Jersey, New Brunswick, NJ, United States
- Child Health Institute of New Jersey, New Brunswick, NJ, United States
- Cancer Institute of New Jersey, New Brunswick, NJ, United States
- *Correspondence: Moshmi M. Bhattacharya
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16
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Leonardi A, Cofini M, Rigante D, Lucchetti L, Cipolla C, Penta L, Esposito S. The Effect of Bisphenol A on Puberty: A Critical Review of the Medical Literature. INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH 2017; 14:ijerph14091044. [PMID: 28891963 PMCID: PMC5615581 DOI: 10.3390/ijerph14091044] [Citation(s) in RCA: 38] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 09/07/2017] [Accepted: 09/08/2017] [Indexed: 02/08/2023]
Abstract
Many scientific studies have revealed a trend towards an earlier onset of puberty and have disclosed an increasing number of children that display precocious puberty. As an explanation, some authors have considered the global socio-economic improvement across different populations, and other authors have considered the action of endocrine disrupting chemicals (EDCs). Among these, bisphenol A (BPA), an aromatic compound largely used worldwide as a precursor of some plastics and chemical additives, is well known for its molecular oestrogen-like and obesogenic actions. We reviewed the medical literature of the previous 20 years that examined associations between BPA exposure and the age of puberty in humans, considering only those referring to clinical or epidemiological data. Of 19 studies, only 7 showed a correlation between BPA and puberty. In particular, the possible disruptive role of BPA on puberty may be seen in those with central precocious puberty or isolated premature breast development aged 2 months to 4 years old, even if the mechanism is undefined. Some studies also found a close relationship between urinary BPA, body weight, and early puberty, which can be explained by the obesogenic effect of BPA itself. The currently available data do not allow establishment of a clear role for BPA in pubertal development because of the conflicting results among all clinical and epidemiological studies examined. Further research is needed to fully understand the potential role of exposure to EDCs and their adverse endocrine health outcomes.
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Affiliation(s)
- Alberto Leonardi
- Pediatric Clinic, Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, 06129 Perugia, Italy.
| | - Marta Cofini
- Pediatric Clinic, Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, 06129 Perugia, Italy.
| | - Donato Rigante
- Institute of Pediatrics, Università Cattolica Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli, 00168 Rome, Italy.
| | - Laura Lucchetti
- Pediatric Clinic, Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, 06129 Perugia, Italy.
| | - Clelia Cipolla
- Institute of Pediatrics, Università Cattolica Sacro Cuore, Fondazione Policlinico Universitario A. Gemelli, 00168 Rome, Italy.
| | - Laura Penta
- Pediatric Clinic, Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, 06129 Perugia, Italy.
| | - Susanna Esposito
- Pediatric Clinic, Department of Surgical and Biomedical Sciences, Università degli Studi di Perugia, 06129 Perugia, Italy.
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17
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Katugampola H, King PJ, Chatterjee S, Meso M, Duncan AJ, Achermann JC, Guasti L, Ghataore L, Taylor NF, Allen R, Marlene S, Aquilina J, Abbara A, Jaysena CN, Dhillo WS, Dunkel L, Sankilampi U, Storr HL. Kisspeptin Is a Novel Regulator of Human Fetal Adrenocortical Development and Function: A Finding With Important Implications for the Human Fetoplacental Unit. J Clin Endocrinol Metab 2017; 102:3349-3359. [PMID: 28911133 PMCID: PMC5587078 DOI: 10.1210/jc.2017-00763] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/29/2017] [Accepted: 06/15/2017] [Indexed: 12/22/2022]
Abstract
CONTEXT The human fetal adrenal (HFA) is an integral component of the fetoplacental unit and important for the maintenance of pregnancy. Low kisspeptin levels during pregnancy are associated with miscarriage, and kisspeptin and its receptor are expressed in the HFA. However, the role of kisspeptin in fetal adrenal function remains unknown. OBJECTIVE To determine the role of kisspeptin in the developing HFA. DESIGN Experiments using H295R and primary HFA cells as in vitro models of the fetal adrenal. Association of plasma kisspeptin levels with HFA size in a longitudinal clinical study. SETTING Academic research center and tertiary fetal medicine unit. PARTICIPANTS Thirty-three healthy pregnant women were recruited at their 12-week routine antenatal ultrasound scan. MAIN OUTCOME MEASURES The spatiotemporal expression of Kiss1R in the HFA. The production of dehydroepiandrosterone sulfate (DHEAS) from HFA cells after kisspeptin treatment, alone or in combination with adrenocorticotropic hormone or corticotropin-releasing hormone. Fetal adrenal volume (FAV) and kisspeptin levels at four antenatal visits (∼20, 28, 34, and 38 weeks' gestation). RESULTS Expression of Kiss1R was present in the HFA from 8 weeks after conception to term and was shown in the inner fetal zone. Kisspeptin significantly increased DHEAS production in H295R and second-trimester HFA cells. Serial measurements of kisspeptin confirmed a correlation with FAV growth in the second trimester, independent of sex or estimated fetal weight. CONCLUSIONS Kisspeptin plays a key role in the regulation of the HFA and thus the fetoplacental unit, particularly in the second trimester of pregnancy.
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Affiliation(s)
- Harshini Katugampola
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Peter J. King
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Sumana Chatterjee
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Muriel Meso
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Andrew J. Duncan
- Genetics & Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, United Kingdom
| | - John C. Achermann
- Genetics & Genomic Medicine, UCL Great Ormond Street Institute of Child Health, London WC1N 1EH, United Kingdom
| | - Leo Guasti
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Lea Ghataore
- Steroid Laboratory, Department of Clinical Biochemistry (Viapath Analytics), King’s College Hospital, London SE5 9RS, United Kingdom
| | - Norman F. Taylor
- Steroid Laboratory, Department of Clinical Biochemistry (Viapath Analytics), King’s College Hospital, London SE5 9RS, United Kingdom
| | - Rebecca Allen
- Fetal Medicine Centre, Royal London Hospital, Barts Health Trust, London E1 1BB, United Kingdom
| | - Shemoon Marlene
- Fetal Medicine Centre, Royal London Hospital, Barts Health Trust, London E1 1BB, United Kingdom
| | - Joseph Aquilina
- Fetal Medicine Centre, Royal London Hospital, Barts Health Trust, London E1 1BB, United Kingdom
| | - Ali Abbara
- Section of Endocrinology and Investigative Medicine, Imperial College London, London W12 0NN, United Kingdom
| | - Channa N. Jaysena
- Section of Endocrinology and Investigative Medicine, Imperial College London, London W12 0NN, United Kingdom
| | - Waljit S. Dhillo
- Section of Endocrinology and Investigative Medicine, Imperial College London, London W12 0NN, United Kingdom
| | - Leo Dunkel
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
| | - Ulla Sankilampi
- Department of Pediatrics, Kuopio University Hospital, Kuopio, Finland
| | - Helen L. Storr
- Centre for Endocrinology, William Harvey Research Institute, London, EC1M 6BQ, United Kingdom
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18
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Reiter E, Ayoub MA, Pellissier LP, Landomiel F, Musnier A, Tréfier A, Gandia J, De Pascali F, Tahir S, Yvinec R, Bruneau G, Poupon A, Crépieux P. β-arrestin signalling and bias in hormone-responsive GPCRs. Mol Cell Endocrinol 2017; 449:28-41. [PMID: 28174117 DOI: 10.1016/j.mce.2017.01.052] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/25/2016] [Revised: 01/31/2017] [Accepted: 01/31/2017] [Indexed: 12/14/2022]
Abstract
G protein-coupled receptors (GPCRs) play crucial roles in the ability of target organs to respond to hormonal cues. GPCRs' activation mechanisms have long been considered as a two-state process connecting the agonist-bound receptor to heterotrimeric G proteins. This view is now challenged as mounting evidence point to GPCRs being connected to large arrays of transduction mechanisms involving heterotrimeric G proteins as well as other players. Amongst the G protein-independent transduction mechanisms, those elicited by β-arrestins upon their recruitment to the active receptors are by far the best characterized and apply to most GPCRs. These concepts, in conjunction with remarkable advances made in the field of GPCR structural biology and biophysics, have supported the notion of ligand-selective signalling also known as pharmacological bias. Interestingly, recent reports have opened intriguing prospects to the way β-arrestins control GPCR-mediated signalling in space and time within the cells. In the present paper, we review the existing evidence linking endocrine-related GPCRs to β-arrestin recruitement, signalling, pathophysiological implications and selective activation by biased ligands and/or receptor modifications. Emerging concepts surrounding β-arrestin-mediated transduction are discussed in the light of the peculiarities of endocrine systems.
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Affiliation(s)
- Eric Reiter
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France.
| | - Mohammed Akli Ayoub
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France; LE STUDIUM(®) Loire Valley Institute for Advanced Studies, 45000, Orléans, France; Biology Department, College of Science, United Arab Emirates University, Al Ain, United Arab Emirates
| | | | - Flavie Landomiel
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Astrid Musnier
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Aurélie Tréfier
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Jorge Gandia
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | | | - Shifa Tahir
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Romain Yvinec
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Gilles Bruneau
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Anne Poupon
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
| | - Pascale Crépieux
- PRC, INRA, CNRS, IFCE, Université de Tours, 37380, Nouzilly, France
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19
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León S, Fernandois D, Sull A, Sull J, Calder M, Hayashi K, Bhattacharya M, Power S, Vilos GA, Vilos AG, Tena-Sempere M, Babwah AV. Beyond the brain-Peripheral kisspeptin signaling is essential for promoting endometrial gland development and function. Sci Rep 2016; 6:29073. [PMID: 27364226 PMCID: PMC4929565 DOI: 10.1038/srep29073] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2016] [Accepted: 06/10/2016] [Indexed: 12/18/2022] Open
Abstract
Uterine growth and endometrial gland formation (adenogenesis) and function, are essential for fertility and are controlled by estrogens and other regulators, whose nature and physiological relevance are yet to be elucidated. Kisspeptin, which signals via Kiss1r, is essential for fertility, primarily through its central control of the hypothalamic-pituitary-ovarian axis, but also likely through peripheral actions. Using genetically modified mice, we addressed the contributions of central and peripheral kisspeptin signaling in regulating uterine growth and adenogenesis. Global ablation of Kiss1 or Kiss1r dramatically suppressed uterine growth and almost fully prevented adenogenesis. However, while uterine growth was fully rescued by E2 treatment of Kiss1−/− mice and by genetic restoration of kisspeptin signaling in GnRH neurons in Kiss1r−/− mice, functional adenogenesis was only marginally restored. Thus, while uterine growth is largely dependent on ovarian E2-output via central kisspeptin signaling, peripheral kisspeptin signaling is indispensable for endometrial adenogenesis and function, essential aspects of reproductive competence.
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Affiliation(s)
- Silvia León
- Department of Cell Biology, Physiology &Immunology, Faculty of Medicine and Instituto Maimonides de Investigacion Biomedica de Córdoba (IMIBIC)/Hospital Reina Sofia, University of Córdoba, Avda. Menéndez Pidal s/n, Spain
| | - Daniela Fernandois
- Department of Cell Biology, Physiology &Immunology, Faculty of Medicine and Instituto Maimonides de Investigacion Biomedica de Córdoba (IMIBIC)/Hospital Reina Sofia, University of Córdoba, Avda. Menéndez Pidal s/n, Spain
| | - Alexandra Sull
- The Children's Health Research Institute, London, Ontario, Canada.,Lawson Health Research Institute, London, Ontario, Canada
| | - Judith Sull
- The Children's Health Research Institute, London, Ontario, Canada.,Lawson Health Research Institute, London, Ontario, Canada
| | - Michele Calder
- The Children's Health Research Institute, London, Ontario, Canada.,Lawson Health Research Institute, London, Ontario, Canada.,Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, Ontario, N6C 2V5, Canada
| | - Kanako Hayashi
- Department of Physiology, Southern Illinois University School of Medicine, Carbondale, IL 62901, USA
| | - Moshmi Bhattacharya
- Lawson Health Research Institute, London, Ontario, Canada.,Department of Physiology and Pharmacology, London, Ontario, N6C 2V5, Canada.,Department of Oncology, London, Ontario University of Western Ontario, London, Ontario, N6C 2V5, Canada
| | - Stephen Power
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, Ontario, N6C 2V5, Canada
| | - George A Vilos
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, Ontario, N6C 2V5, Canada
| | - Angelos G Vilos
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, Ontario, N6C 2V5, Canada
| | - Manuel Tena-Sempere
- Department of Cell Biology, Physiology &Immunology, Faculty of Medicine and Instituto Maimonides de Investigacion Biomedica de Córdoba (IMIBIC)/Hospital Reina Sofia, University of Córdoba, Avda. Menéndez Pidal s/n, Spain.,CIBEROBN, Instituto de Salud Carlos III, 14004 Córdoba, Spain.,FiDiPro Program, Department of Physiology, University of Turku, 20520 Turku, Finland
| | - Andy V Babwah
- The Children's Health Research Institute, London, Ontario, Canada.,Lawson Health Research Institute, London, Ontario, Canada.,Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, Ontario, N6C 2V5, Canada.,Department of Physiology and Pharmacology, London, Ontario, N6C 2V5, Canada
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20
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GnRH Neuron-Specific Ablation of Gαq/11 Results in Only Partial Inactivation of the Neuroendocrine-Reproductive Axis in Both Male and Female Mice: In Vivo Evidence for Kiss1r-Coupled Gαq/11-Independent GnRH Secretion. J Neurosci 2016; 35:12903-16. [PMID: 26377475 DOI: 10.1523/jneurosci.0041-15.2015] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
UNLABELLED The gonadotropin-releasing hormone (GnRH) is the master regulator of fertility and kisspeptin (KP) is a potent trigger of GnRH secretion from GnRH neurons. KP signals via KISS1R, a Gαq/11-coupled receptor, and mice bearing a global deletion of Kiss1r (Kiss1r(-/-)) or a GnRH neuron-specific deletion of Kiss1r (Kiss1r(d/d)) display hypogonadotropic hypogonadism and infertility. KISS1R also signals via β-arrestin, and in mice lacking β-arrestin-1 or -2, KP-triggered GnRH secretion is significantly diminished. Based on these findings, we hypothesized that ablation of Gαq/11 in GnRH neurons would diminish but not completely block KP-triggered GnRH secretion and that Gαq/11-independent GnRH secretion would be sufficient to maintain fertility. To test this, Gnaq (encodes Gαq) was selectively inactivated in the GnRH neurons of global Gna11 (encodes Gα11)-null mice by crossing Gnrh-Cre and Gnaq(fl/fl);Gna11(-/-) mice. Experimental Gnaq(fl/fl);Gna11(-/-);Gnrh-Cre (Gnaq(d/d)) and control Gnaq(fl/fl);Gna11(-/-) (Gnaq(fl/fl)) littermate mice were generated and subjected to reproductive profiling. This process revealed that testicular development and spermatogenesis, preputial separation, and anogenital distance in males and day of vaginal opening and of first estrus in females were significantly less affected in Gnaq(d/d) mice than in previously characterized Kiss1r(-/-) or Kiss1r(d/d) mice. Additionally, Gnaq(d/d) males were subfertile, and although Gnaq(d/d) females did not ovulate spontaneously, they responded efficiently to a single dose of gonadotropins. Finally, KP stimulation triggered a significant increase in gonadotropins and testosterone levels in Gnaq(d/d) mice. We therefore conclude that the milder reproductive phenotypes and maintained responsiveness to KP and gonadotropins reflect Gαq/11-independent GnRH secretion and activation of the neuroendocrine-reproductive axis in Gnaq(d/d) mice. SIGNIFICANCE STATEMENT The gonadotropin-releasing hormone (GnRH) is the master regulator of fertility. Over the last decade, several studies have established that the KISS1 receptor, KISS1R, is a potent trigger of GnRH secretion and inactivation of KISS1R on the GnRH neuron results in infertility. While KISS1R is best understood as a Gαq/11-coupled receptor, we previously demonstrated that it could couple to and signal via non-Gαq/11-coupled pathways. The present study confirms these findings and, more importantly, while it establishes Gαq/11-coupled signaling as a major conduit of GnRH secretion, it also uncovers a significant role for non-Gαq/11-coupled signaling in potentiating reproductive development and function. This study further suggests that by augmenting signaling via these pathways, GnRH secretion can be enhanced to treat some forms of infertility.
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Fayazi M, Calder M, Bhattacharya M, Vilos GA, Power S, Babwah AV. The pregnant mouse uterus exhibits a functional kisspeptin/KISS1R signaling system on the day of embryo implantation. Reprod Biol Endocrinol 2015; 13:105. [PMID: 26384646 PMCID: PMC4575475 DOI: 10.1186/s12958-015-0105-1] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/10/2015] [Accepted: 09/16/2015] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Expression of kisspeptin (protein) and Kiss1r (mRNA) was recently documented in the mouse uterus on D4 of pregnancy (the day of embryo implantation) suggesting that the uterine-based kisspeptin (KP)/kisspeptin receptor (KISS1R) signaling system regulates embryo implantation. Despite this important suggestion, it was never demonstrated that the uterus actually exhibits a functional KP/KISS1R signaling system on D4 of pregnancy. Thus, the goal of this study was to determine whether a functional KP/KISS1R signaling system exists in the mouse uterus on D4 of pregnancy. FINDINGS Since kisspeptin/KISS1R signaling triggers the phosphorylation of the mitogen-activated protein kinases p38 and ERK1/2, through immunohistochemical analyses, we determined whether exogenously administered kisspeptin could trigger p38 and ERK1/2 phosphorylation in the uterus on D4 of pregnancy. The results clearly demonstrated that kisspeptin could and that its effects were mediated via KISS1R. Additionally, the robust kisspeptin-triggered response was observed in the pregnant uterus only. Finally, it was demonstrated that on D4 of pregnancy the Kiss1 null uterus expresses functional KISS1R molecules capable of mediating the effects of kisspeptin. CONCLUSIONS These results lead us to conclude that on D4 of pregnancy, the mouse uterus expresses a functional KP/KISS1R signaling system strengthening the possibility that this signaling system regulates embryo implantation. These findings strengthen the rationale for determining whether such a functional system exists in the uterus of the human female and if so, what role it might play in human pregnancy.
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Affiliation(s)
- Mehri Fayazi
- The Children's Health Research Institute, Victoria Research Laboratories, 800 Commissioners Road East, London, ON, Canada, N6C 2V5.
- Lawson Health Research Institute, London, ON, Canada.
- Department of Physiology and Pharmacology, London, ON, Canada, N6C 2V5.
| | - Michele Calder
- The Children's Health Research Institute, Victoria Research Laboratories, 800 Commissioners Road East, London, ON, Canada, N6C 2V5.
- Lawson Health Research Institute, London, ON, Canada.
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, ON, Canada, N6C 2V5.
| | - Moshmi Bhattacharya
- Lawson Health Research Institute, London, ON, Canada.
- Department of Physiology and Pharmacology, London, ON, Canada, N6C 2V5.
- Department of Oncology, London, Ontario University of Western Ontario, London, ON, Canada, N6C 2V5.
| | - George A Vilos
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, ON, Canada, N6C 2V5.
| | - Stephen Power
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, ON, Canada, N6C 2V5.
| | - Andy V Babwah
- The Children's Health Research Institute, Victoria Research Laboratories, 800 Commissioners Road East, London, ON, Canada, N6C 2V5.
- Lawson Health Research Institute, London, ON, Canada.
- Department of Obstetrics and Gynaecology, Division of Reproductive Endocrinology and Infertility, London, ON, Canada, N6C 2V5.
- Department of Physiology and Pharmacology, London, ON, Canada, N6C 2V5.
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Babwah AV. Uterine and placental KISS1 regulate pregnancy: what we know and the challenges that lie ahead. Reproduction 2015; 150:R121-8. [PMID: 26183891 DOI: 10.1530/rep-15-0252] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 07/16/2015] [Indexed: 01/11/2023]
Abstract
Hypothalamic KISS1 and its derivatives (kisspeptins) are now well recognized as potent stimulators of GnRH secretion and thereby major regulators of the neuroendocrine-reproductive axis. Recent studies in the mouse strongly suggest that independent of the hypothalamus and pituitary, peripherally derived KISS1 also regulates fertility, and disruption of local KISS1 signaling in the ovary and uterus is sufficient to trigger infertility. With this increasing recognition that peripherally derived KISS1 regulates fertility, the first goal of this review is to critically discuss the data that have led to this conclusion, focusing on uterine- and placental-derived KISS1. Given that a significant amount of this data was generated in animals such as the mouse and rat, a second goal of this review is to identify and discuss the limitations of the animal data in the context of better understanding KISS1 as a regulator of human pregnancy. The growing evidence suggests that in both man and mouse, KISS1 plays an important role in regulating very early pregnancy events such as embryo implantation. However, as pregnancy advances, although it seems that KISS1 continues to play important roles in regulating human pregnancy, it might not do so in the mouse. This surprising functional dichotomy between human females and mice appears also to exist between women and a large number of animal species, including lower primates. These findings are of tremendous significance and will greatly shape how KISS1 will be developed as a therapeutic agent in augmenting the reproductive potential of both women and important livestock species.
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Affiliation(s)
- Andy V Babwah
- The Children's Health Research InstituteLawson Health Research InstituteDepartments of Obstetrics and Gynaecology and Physiology and PharmacologyThe University of Western Ontario, 800 Commissioners Road East, London, Ontario, Canada N6C 2V5 The Children's Health Research InstituteLawson Health Research InstituteDepartments of Obstetrics and Gynaecology and Physiology and PharmacologyThe University of Western Ontario, 800 Commissioners Road East, London, Ontario, Canada N6C 2V5 The Children's Health Research InstituteLawson Health Research InstituteDepartments of Obstetrics and Gynaecology and Physiology and PharmacologyThe University of Western Ontario, 800 Commissioners Road East, London, Ontario, Canada N6C 2V5
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Millar RP. New Insights into GnRH Neuron Development, Programming and Regulation in Health and Disease. Preface. Neuroendocrinology 2015; 102:181-3. [PMID: 26394199 DOI: 10.1159/000441115] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Affiliation(s)
- Robert P Millar
- Centre for Neuroendocrinology and Mammal Research Institute, University of Pretoria, Pretoria, South Africa
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