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Temre MK, Kumar A, Singh SM. An appraisal of the current status of inhibition of glucose transporters as an emerging antineoplastic approach: Promising potential of new pan-GLUT inhibitors. Front Pharmacol 2022; 13:1035510. [PMID: 36386187 PMCID: PMC9663470 DOI: 10.3389/fphar.2022.1035510] [Citation(s) in RCA: 9] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2022] [Accepted: 10/18/2022] [Indexed: 07/23/2023] Open
Abstract
Neoplastic cells displayed altered metabolism with accelerated glycolysis. Therefore, these cells need a mammoth supply of glucose for which they display an upregulated expression of various glucose transporters (GLUT). Thus, novel antineoplastic strategies focus on inhibiting GLUT to intersect the glycolytic lifeline of cancer cells. This review focuses on the current status of various GLUT inhibition scenarios. The GLUT inhibitors belong to both natural and synthetic small inhibitory molecules category. As neoplastic cells express multiple GLUT isoforms, it is necessary to use pan-GLUT inhibitors. Nevertheless, it is also necessary that such pan-GLUT inhibitors exert their action at a low concentration so that normal healthy cells are left unharmed and minimal injury is caused to the other vital organs and systems of the body. Moreover, approaches are also emerging from combining GLUT inhibitors with other chemotherapeutic agents to potentiate the antineoplastic action. A new pan-GLUT inhibitor named glutor, a piperazine-one derivative, has shown a potent antineoplastic action owing to its inhibitory action exerted at nanomolar concentrations. The review discusses the merits and limitations of the existing GLUT inhibitory approach with possible future outcomes.
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Affiliation(s)
- Mithlesh Kumar Temre
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Ajay Kumar
- Deparment of Zoology, Institute of Science, Banaras Hindu University, Varanasi, India
| | - Sukh Mahendra Singh
- School of Biotechnology, Institute of Science, Banaras Hindu University, Varanasi, India
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Nicholas DA, Knight VS, Tonsfeldt KJ, Terasaka T, Molinar-Inglis O, Stephens SBZ, Trejo J, Kauffman AS, Mellon PL, Lawson MA. GLUT1-mediated glycolysis supports GnRH-induced secretion of luteinizing hormone from female gonadotropes. Sci Rep 2020; 10:13063. [PMID: 32747664 PMCID: PMC7400764 DOI: 10.1038/s41598-020-69913-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2020] [Accepted: 07/21/2020] [Indexed: 12/03/2022] Open
Abstract
The mechanisms mediating suppression of reproduction in response to decreased nutrient availability remain undefined, with studies suggesting regulation occurs within the hypothalamus, pituitary, or gonads. By manipulating glucose utilization and GLUT1 expression in a pituitary gonadotrope cell model and in primary gonadotropes, we show GLUT1-dependent stimulation of glycolysis, but not mitochondrial respiration, by the reproductive neuropeptide GnRH. GnRH stimulation increases gonadotrope GLUT1 expression and translocation to the extracellular membrane. Maximal secretion of the gonadotropin Luteinizing Hormone is supported by GLUT1 expression and activity, and GnRH-induced glycolysis is recapitulated in primary gonadotropes. GLUT1 expression increases in vivo during the GnRH-induced ovulatory LH surge and correlates with GnRHR. We conclude that the gonadotropes of the anterior pituitary sense glucose availability and integrate this status with input from the hypothalamus via GnRH receptor signaling to regulate reproductive hormone synthesis and secretion.
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Affiliation(s)
- Dequina A Nicholas
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Vashti S Knight
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Karen J Tonsfeldt
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Tomohiro Terasaka
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | | | - Shannon B Z Stephens
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - JoAnn Trejo
- Department of Pharmacology, University of California, San Diego, La Jolla, CA, USA
| | - Alexander S Kauffman
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Pamela L Mellon
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA
| | - Mark A Lawson
- Department of Obstetrics, Gynecology and Reproductive Sciences, and Center for Reproductive Science and Medicine, University of California, San Diego, La Jolla, CA, USA.
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Boyle J, Patronas NJ, Smirniotopoulos J, Herscovitch P, Dieckman W, Millo C, Maric D, Chatain GP, Hayes CP, Benzo S, Scott G, Edwards N, Ray Chaudhury A, Lodish MB, Sharma S, Nieman LK, Stratakis CA, Lonser RR, Chittiboina P. CRH stimulation improves 18F-FDG-PET detection of pituitary adenomas in Cushing's disease. Endocrine 2019; 65:155-165. [PMID: 31062234 DOI: 10.1007/s12020-019-01944-7] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/12/2019] [Accepted: 04/24/2019] [Indexed: 01/04/2023]
Abstract
OBJECTIVE In MRI-negative cases Cushing's disease (CD), surgeons perform a more extensive exploration of the pituitary gland, with fewer instances of hormonal remission. 18F-fluoro-deoxy-glucose (18F-FDG) positron emission tomography (PET) has a limited role in detecting adenomas that cause CD (corticotropinomas). Our previous work demonstrated corticotropin-releasing hormone (CRH) stimulation leads to delayed, selective glucose uptake in corticotropinomas. Here, we prospectively evaluated the utility of CRH stimulation in improving 18F-FDG-PET detection of adenomas in CD. METHODS Subjects with a likely diagnosis of CD (n = 27, 20 females) each underwent two 18F-FDG-PET studies [without and with ovine-CRH (oCRH) stimulation] on a high-resolution PET platform. Standardized-uptake-values (SUV) in the sella were calculated. Two blinded neuroradiologists independently read 18F-FDG-PET images qualitatively. Adenomas were histopathologically confirmed, analyzed for mutations in the USP8 gene and for glycolytic pathway proteins. RESULTS The mean-SUV of adenomas was significantly increased from baseline (3.6 ± 1.5) with oCRH administration (3.9 ± 1.7; one-tailed p = 0.003). Neuroradiologists agreed that adenomas were visible on 21 scans, not visible on 26 scans (disagreed about 7, kappa = 0.7). oCRH-stimulation led to the detection of additional adenomas (n = 6) not visible on baseline-PET study. Of the MRI-negative adenomas (n = 5), two were detected on PET imaging (one only after oCRH-stimulation). USP8 mutations or glycolytic pathway proteins were not associated with SUV in corticotropinomas. CONCLUSIONS The results of the current study suggest that oCRH-stimulation may lead to increased 18F-FDG uptake, and increased rate of detection of corticotropinomas in CD. These results also suggest that some MRI invisible adenomas may be detectable by oCRH-stimulated FDG-PET imaging. CLINICAL TRIAL INFORMATION 18F-FDG-PET imaging with and without CRH stimulation was performed under the clinical trial NIH ID 12-N-0007 (clinicaltrials.gov identifier NCT01459237). The transsphenoidal surgeries and post-operative care was performed under the clinical trial NIH ID 03-N-0164 (clinicaltrials.gov identifier NCT00060541).
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Affiliation(s)
- Jacqueline Boyle
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, Bethesda, MD, USA
- University of Illinois College of Medicine at Peoria, Peoria, IL, USA
| | - Nicholas J Patronas
- Diagnostic Radiology, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | | | - Peter Herscovitch
- Department of Positron Emission Tomography, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - William Dieckman
- Department of Positron Emission Tomography, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Corina Millo
- Department of Positron Emission Tomography, Warren Grant Magnuson Clinical Center, National Institutes of Health, Bethesda, MD, USA
| | - Dragan Maric
- Flow Cytometry Core Facility, National Institute of Neurologic Diseases and Stroke, Bethesda, MD, USA
| | - Grégoire P Chatain
- Surgical Neurology Branch, National Institute of Neurological Disorders and Stroke, Bethesda, MD, USA
| | | | - Sarah Benzo
- Department of Neurosurgery, University of Colorado, Denver, CO, USA
| | - Gretchen Scott
- Department of Neurosurgery, University of Colorado, Denver, CO, USA
| | - Nancy Edwards
- Department of Neurosurgery, University of Colorado, Denver, CO, USA
| | | | - Maya B Lodish
- Section on Endocrinology and Genetics, Pediatric Endocrinology Inter-Institute Training Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | - Susmeeta Sharma
- Pituitary Endocrinology Section, MedStar Washington Hospital Center, Washington, DC, USA
| | - Lynnette K Nieman
- Diabetes, Endocrinology and Obesity Branch, National Institute of Diabetes and Digestive and Kidney Diseases, Bethesda, MD, USA
| | - Constantine A Stratakis
- Section on Endocrinology and Genetics, Pediatric Endocrinology Inter-Institute Training Program, Eunice Kennedy Shriver National Institute of Child Health and Human Development, Bethesda, MD, USA
| | - Russell R Lonser
- Department of Neurological Surgery, The Ohio State University, Columbus, OH, USA
| | - Prashant Chittiboina
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, Bethesda, MD, USA.
- Department of Neurosurgery, University of Colorado, Denver, CO, USA.
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Feldman A, Saleh A, Pnueli L, Qiao S, Shlomi T, Boehm U, Melamed P. Sensitivity of pituitary gonadotropes to hyperglycemia leads to epigenetic aberrations and reduced follicle‐stimulating hormone levels. FASEB J 2018; 33:1020-1032. [DOI: 10.1096/fj.201800943r] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Affiliation(s)
- Alona Feldman
- Faculty of BiologyTechnion–Israel Institute of Technology Haifa Israel
| | - Ayah Saleh
- Faculty of BiologyTechnion–Israel Institute of Technology Haifa Israel
| | - Lilach Pnueli
- Faculty of BiologyTechnion–Israel Institute of Technology Haifa Israel
| | - Sen Qiao
- Experimental PharmacologyCenter for Molecular Signaling (PZMS)Saarland University School of Medicine Homburg Germany
| | - Tomer Shlomi
- Faculty of BiologyTechnion–Israel Institute of Technology Haifa Israel
- Department of Computer ScienceTechnion–Israel Institute of Technology Haifa Israel
| | - Ulrich Boehm
- Experimental PharmacologyCenter for Molecular Signaling (PZMS)Saarland University School of Medicine Homburg Germany
| | - Philippa Melamed
- Faculty of BiologyTechnion–Israel Institute of Technology Haifa Israel
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5
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Lu J, Montgomery BK, Chatain GP, Bugarini A, Zhang Q, Wang X, Edwards NA, Ray-Chaudhury A, Merrill MJ, Lonser RR, Chittiboina P. Corticotropin releasing hormone can selectively stimulate glucose uptake in corticotropinoma via glucose transporter 1. Mol Cell Endocrinol 2018; 470:105-114. [PMID: 28986303 PMCID: PMC5882598 DOI: 10.1016/j.mce.2017.10.003] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Revised: 09/30/2017] [Accepted: 10/02/2017] [Indexed: 10/18/2022]
Abstract
BACKGROUND Pre-operative detection of corticotropin (ACTH) secreting microadenomas causing Cushing's disease (CD) improves surgical outcomes. Current best magnetic resonance imaging fails to detect up to 40% of these microadenomas. 18F-fluorodeoxyglucose (18F-FDG) positron emission tomography (PET) is specific, but not sensitive in detecting corticotropinomas. Theoretically, secretagogue stimulation with corticotropin releasing hormone (CRH) could improve detection of adenomas with 18F-FDG PET. Previous attempts with simultaneous CRH stimulation have failed to demonstrate increased 18F-FDG uptake in corticotropinomas. We hypothesized that CRH stimulation leads to a delayed elevation in glucose uptake in corticotropinomas. METHODS Clinical data was analyzed for efficacy of CRH in improving 18FDG-PET detection of corticotropinomas in CD. Glucose transporter 1 (GLUT1) immunoreactivity was performed on surgical specimens. Ex-vivo, viable cells from these tumors were tested for secretagogue effects (colorimetric glucose uptake), and for fate of intracellular glucose (glycolysis stress analysis). Validation of ex-vivo findings was performed with AtT-20 cells. RESULTS CRH increased glucose uptake in human-derived corticotroph tumor cells and AtT-20, but not in normal murine or human corticotrophs (p < 0.0001). Continuous and intermittent (1 h) CRH exposure increased glucose uptake in AtT-20 with maximal effect at 4 h (p = 0.001). Similarly, CRH and 8-Br-cAMP led to robust GLUT1 upregulation and increased membrane translocation at 2 h, while fasentin suppressed baseline (p < 0.0001) and CRH-mediated glucose uptake. Expectedly, intra-operatively collected corticotropinomas demonstrated GLUT1 overexpression. Lastly, human derived corticotroph tumor cells demonstrated increased glycolysis and low glucose oxidation. CONCLUSION Increased and delayed CRH-mediated glucose uptake differentially occurs in adenomatous corticotrophs. Delayed secretagogue-stimulated 18F-FDG PET could improve microadenoma detection.
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Affiliation(s)
- Jie Lu
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, Bethesda MD
| | - Blake K. Montgomery
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
- Department of Orthopedic Surgery, Stanford Medicine, Stanford, CA
| | - Grégoire P. Chatain
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, Bethesda MD
| | - Alejandro Bugarini
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Qi Zhang
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Xiang Wang
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Nancy A. Edwards
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Abhik Ray-Chaudhury
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Marsha J. Merrill
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
| | - Russell R Lonser
- Department of Neurological Surgery, Wexner Medical Center, The Ohio State University, Columbus, OH
| | - Prashant Chittiboina
- Neurosurgery Unit for Pituitary and Inheritable Diseases, National Institute of Neurological Diseases and Stroke, Bethesda MD
- Surgical Neurology Branch, National Institute of Neurological Diseases and Stroke, Bethesda, MD
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Andrianifahanana M, Hernandez DM, Yin X, Kang JH, Jung MY, Wang Y, Yi ES, Roden AC, Limper AH, Leof EB. Profibrotic up-regulation of glucose transporter 1 by TGF-β involves activation of MEK and mammalian target of rapamycin complex 2 pathways. FASEB J 2016; 30:3733-3744. [PMID: 27480571 PMCID: PMC5067255 DOI: 10.1096/fj.201600428r] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/18/2016] [Accepted: 07/18/2016] [Indexed: 12/18/2022]
Abstract
TGF-β plays a central role in the pathogenesis of fibroproliferative disorders. Defining the exact underlying molecular basis is therefore critical for the development of viable therapeutic strategies. Here, we show that expression of the facilitative glucose transporter 1 (GLUT1) is induced by TGF-β in fibroblast lines and primary cells and is required for the profibrotic effects of TGF-β. In addition, enhanced GLUT1 expression is observed in fibrotic areas of lungs of both patients with idiopathic pulmonary fibrosis and mice that are subjected to a fibrosis-inducing bleomycin treatment. By using pharmacologic and genetic approaches, we demonstrate that up-regulation of GLUT1 occurs via the canonical Smad2/3 pathway and requires autocrine activation of the receptor tyrosine kinases, platelet-derived and epidermal growth factor receptors. Engagement of the common downstream effector PI3K subsequently triggers activation of the MEK and mammalian target of rapamycin complex 2, which cooperate in regulating GLUT1 expression. Of note, inhibition of GLUT1 activity and/or expression is shown to impair TGF-β-driven fibrogenic processes, including cell proliferation and production of profibrotic mediators. These findings provide new perspectives on the interrelation of metabolism and profibrotic TGF-β signaling and present opportunities for potential therapeutic intervention.-Andrianifahanana, M., Hernandez, D. M., Yin, X., Kang, J.-H., Jung, M.-Y., Wang, Y., Yi, E. S., Roden, A. C., Limper, A. H., Leof, E. B. Profibrotic up-regulation of glucose transporter 1 by TGF-β involves activation of MEK and mammalian target of rapamycin complex 2 pathways.
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Affiliation(s)
- Mahefatiana Andrianifahanana
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Danielle M Hernandez
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Xueqian Yin
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Jeong-Han Kang
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Mi-Yeon Jung
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Youli Wang
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
- Division of Nephrology, Augusta University, Augusta, Georgia, USA
| | - Eunhee S Yi
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Anja C Roden
- Department of Laboratory Medicine and Pathology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Andrew H Limper
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA
| | - Edward B Leof
- Thoracic Disease Research Unit, Division of Pulmonary and Critical Care Medicine, Department of Biochemistry and Molecular Biology, Mayo Clinic College of Medicine, Rochester, Minnesota, USA;
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Anjum S, Krishna A, Tsutsui K. Possible Role of GnIH as a Mediator between Adiposity and Impaired Testicular Function. Front Endocrinol (Lausanne) 2016; 7:6. [PMID: 26869993 PMCID: PMC4737883 DOI: 10.3389/fendo.2016.00006] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/30/2015] [Accepted: 01/15/2016] [Indexed: 12/01/2022] Open
Abstract
The aim of the present study was to evaluate the roles of gonadotropin-inhibitory hormone (GnIH) as an endocrine link between increasing adiposity and impaired testicular function in mice. To achieve this, the effect of GnIH on changes in nutrients uptake and hormonal synthesis/action in the adipose tissue and testis was investigated simultaneously by in vivo study and separately by in vitro study. Mice were treated in vivo with different doses of GnIH for 8 days. In the in vitro study, adipose tissue and testes of mice were cultured with different doses of GnIH with or without insulin or LH for 24 h at 37°C. The GnIH treatment in vivo showed increased food intake, upregulation of glucose transporter 4 (GLUT4), and increased uptake of triglycerides (TGs) in the adipose tissue. These changes may be responsible for increased accumulation of fat in white adipose tissue, resulting in increase in the body mass. Contrary to the adipose tissue, treatment with GnIH both in vivo and in vitro showed decreased uptake of glucose by downregulation of glucose transporter 8 (GLUT8) expressions in the testis, which in turn resulted in the decreased synthesis of testosterone. The GnIH treatment in vivo also showed the decreased expression of insulin receptor protein in the testis, which may also be responsible for the decreased testicular activity in the mice. These findings thus suggest that GnIH increases the uptake of glucose and TGs in the adipose tissue, resulting in increased accumulation of fat, whereas simultaneously in the testis, GnIH suppressed the GLUT8-mediated glucose uptake, which in turn may be responsible for decreased testosterone synthesis. This study thus demonstrates GnIH as mediator of increasing adiposity and impaired testicular function in mice.
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Affiliation(s)
- Shabana Anjum
- Department of Zoology, Banaras Hindu University, Varanasi, India
| | - Amitabh Krishna
- Department of Zoology, Banaras Hindu University, Varanasi, India
- *Correspondence: Amitabh Krishna,
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8
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Przybycien-Szymanska MM, Rao YS, Prins SA, Pak TR. Parental binge alcohol abuse alters F1 generation hypothalamic gene expression in the absence of direct fetal alcohol exposure. PLoS One 2014; 9:e89320. [PMID: 24586686 PMCID: PMC3930730 DOI: 10.1371/journal.pone.0089320] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2013] [Accepted: 01/17/2014] [Indexed: 11/26/2022] Open
Abstract
Adolescent binge alcohol exposure has long-lasting effects on the expression of hypothalamic genes that regulate the stress response, even in the absence of subsequent adult alcohol exposure. This suggests that alcohol can induce permanent gene expression changes, potentially through epigenetic modifications to specific genes. Epigenetic modifications can be transmitted to future generations therefore, and in these studies we investigated the effects of adolescent binge alcohol exposure on hypothalamic gene expression patterns in the F1 generation offspring. It has been well documented that maternal alcohol exposure during fetal development can have devastating neurological consequences. However, less is known about the consequences of maternal and/or paternal alcohol exposure outside of the gestational time frame. Here, we exposed adolescent male and female rats to a repeated binge EtOH exposure paradigm and then mated them in adulthood. Hypothalamic samples were taken from the offspring of these animals at postnatal day (PND) 7 and subjected to a genome-wide microarray analysis followed by qRT-PCR for selected genes. Importantly, the parents were not intoxicated at the time of mating and were not exposed to EtOH at any time during gestation therefore the offspring were never directly exposed to EtOH. Our results showed that the offspring of alcohol-exposed parents had significant differences compared to offspring from alcohol-naïve parents. Specifically, major differences were observed in the expression of genes that mediate neurogenesis and synaptic plasticity during neurodevelopment, genes important for directing chromatin remodeling, posttranslational modifications or transcription regulation, as well as genes involved in regulation of obesity and reproductive function. These data demonstrate that repeated binge alcohol exposure during pubertal development can potentially have detrimental effects on future offspring even in the absence of direct fetal alcohol exposure.
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Affiliation(s)
- Magdalena M. Przybycien-Szymanska
- Loyola University Chicago Health Science Division, Department of Cell and Molecular Physiology, Maywood, Illinois, United States of America
| | - Yathindar S. Rao
- Loyola University Chicago Health Science Division, Department of Cell and Molecular Physiology, Maywood, Illinois, United States of America
| | - Sarah A. Prins
- Loyola University Chicago Health Science Division, Department of Cell and Molecular Physiology, Maywood, Illinois, United States of America
| | - Toni R. Pak
- Loyola University Chicago Health Science Division, Department of Cell and Molecular Physiology, Maywood, Illinois, United States of America
- * E-mail:
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9
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Garcia-Garcia RM. Integrative control of energy balance and reproduction in females. ISRN VETERINARY SCIENCE 2012; 2012:121389. [PMID: 23762577 PMCID: PMC3671732 DOI: 10.5402/2012/121389] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/16/2012] [Accepted: 09/04/2012] [Indexed: 11/23/2022]
Abstract
There is a strong association between nutrition and reproduction. Chronic dietary energy deficits as well as energy surpluses can impair reproductive capacity. Metabolic status impacts reproductive function at systemic level, modulating the hypothalamic GnRH neuronal network and/or the pituitary gonadotropin secretion through several hormones and neuropeptides, and at the ovarian level, acting through the regulation of follicle growth and steroidogenesis by means of the growth hormone-IGF-insulin system and local ovarian mediators. In the past years, several hormones and neuropeptides have been emerging as important mediators between energy balance and reproduction. The present review goes over the main sites implicated in the control of energy balance linked to reproductive success and summarizes the most important metabolic and neuroendocrine signals that participate in reproductive events with special emphasis on the role of recently discovered neuroendocrine peptides. Also, a little overview about the effects of maternal nutrition, affecting offspring reproduction, has been presented.
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Affiliation(s)
- R M Garcia-Garcia
- Physiology Department (Animal Physiology), Complutense University, Avenida Puerta de Hierro S/N, 28040 Madrid, Spain
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10
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Zhang C, Niu W, Wang Z, Wang X, Xia G. The effect of gonadotropin on glucose transport and apoptosis in rat ovary. PLoS One 2012; 7:e42406. [PMID: 22870326 PMCID: PMC3411621 DOI: 10.1371/journal.pone.0042406] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2012] [Accepted: 07/04/2012] [Indexed: 12/03/2022] Open
Abstract
Although the effects of Gonadotropin on ovarian physiology have been known for many decades, its action on glucose uptake in the rat ovary remained poorly understood. Evidence also suggests that glucose uptake is mediated by a number of glucose transporter proteins (Glut). Therefore, we examined the rat ovary for the presence of Glut1–4 and blood glucose level after eCG (equine chorionic gonadotropin) and anti-eCG antiserum treatment. All of the glucose transports were present in the ovarian oocyte, granulosa cells and theca cells in different stage follicles. The expression of Glut in ovary was up-regulated by eCG, however, anti-eCG antiserum reversed eCG action. Western blot analysis also demonstrated the content of Glut1 was higher in eCG treatment group compared with anti-eCG antiserum and control group. The same tendency was shown in other glut isoforms. Moreover, there were no significant difference between the anti-eCG antiserum and control group. In additional, the level of serum glucose in eCG treatment group was significantly higher than others, which is similar with glut expression pattern. High glucose level in blood is correlated with increased expression of glucose transporter proteins in rat ovary. Meanwhile, anti-eCG antiserum increased granulosa cell apoptosis in antral follicle compared with those in eCG group. Our observations provide potential explanation for the effects of Glut on follicular development in rat ovary and a role for eCG in the regulation of ovarian glucose uptake.
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Affiliation(s)
- Cheng Zhang
- College of Life Science, Capital Normal University, Beijing, People's Republic of China
| | - Wanbao Niu
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Zhengpin Wang
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
| | - Xiaoxia Wang
- College of Life Science, Capital Normal University, Beijing, People's Republic of China
- * E-mail: (XW); (GX)
| | - Guoliang Xia
- State Key Laboratory for Agro-Biotechnology, College of Biological Science, China Agricultural University, Beijing, People's Republic of China
- * E-mail: (XW); (GX)
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