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Szczepanska-Sadowska E. Interplay of Angiotensin Peptides, Vasopressin, and Insulin in the Heart: Experimental and Clinical Evidence of Altered Interactions in Obesity and Diabetes Mellitus. Int J Mol Sci 2024; 25:1310. [PMID: 38279313 PMCID: PMC10816525 DOI: 10.3390/ijms25021310] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 01/18/2024] [Accepted: 01/18/2024] [Indexed: 01/28/2024] Open
Abstract
The present review draws attention to the specific role of angiotensin peptides [angiotensin II (Ang II), angiotensin-(1-7) (Ang-(1-7)], vasopressin (AVP), and insulin in the regulation of the coronary blood flow and cardiac contractions. The interactions of angiotensin peptides, AVP, and insulin in the heart and in the brain are also discussed. The intracardiac production and the supply of angiotensin peptides and AVP from the systemic circulation enable their easy access to the coronary vessels and the cardiomyocytes. Coronary vessels and cardiomyocytes are furnished with AT1 receptors, AT2 receptors, Ang (1-7) receptors, vasopressin V1 receptors, and insulin receptor substrates. The presence of some of these molecules in the same cells creates good conditions for their interaction at the signaling level. The broad spectrum of actions allows for the engagement of angiotensin peptides, AVP, and insulin in the regulation of the most vital cardiac processes, including (1) cardiac tissue oxygenation, energy production, and metabolism; (2) the generation of the other cardiovascular compounds, such as nitric oxide, bradykinin (Bk), and endothelin; and (3) the regulation of cardiac work by the autonomic nervous system and the cardiovascular neurons of the brain. Multiple experimental studies and clinical observations show that the interactions of Ang II, Ang(1-7), AVP, and insulin in the heart and in the brain are markedly altered during heart failure, hypertension, obesity, and diabetes mellitus, especially when these diseases coexist. A survey of the literature presented in the review provides evidence for the belief that very individualized treatment, including interactions of angiotensins and vasopressin with insulin, should be applied in patients suffering from both the cardiovascular and metabolic diseases.
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Affiliation(s)
- Ewa Szczepanska-Sadowska
- Department of Experimental and Clinical Physiology, Laboratory of Centre for Preclinical Research, Medical University of Warsaw, 02-097 Warsaw, Poland
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2
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Lebedeva S, Margaryan A, Smolyarchuk E, Nedorubov A, Materenchuk M, Tonevitsky A, Mutig K. Metabolic effects of vasopressin in pathophysiology of diabetic kidney disease. Front Endocrinol (Lausanne) 2023; 14:1176199. [PMID: 37790608 PMCID: PMC10545091 DOI: 10.3389/fendo.2023.1176199] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2023] [Accepted: 08/23/2023] [Indexed: 10/05/2023] Open
Abstract
The diabetic kidney disease (DKD) is the major cause of the chronic kidney disease (CKD). Enhanced plasma vasopressin (VP) levels have been associated with the pathophysiology of DKD and CKD. Stimulation of VP release in DKD is caused by glucose-dependent reset of the osmostat leading to secondary pathophysiologic effects mediated by distinct VP receptor types. VP is a stress hormone exhibiting the antidiuretic action in the kidney along with broad adaptive effects in other organs. Excessive activation of the vasopressin type 2 (V2) receptor in the kidney leads to glomerular hyperfiltration and nephron loss, whereas stimulation of vasopressin V1a or V1b receptors in the liver, pancreas, and adrenal glands promotes catabolic metabolism for energy mobilization, enhancing glucose production and aggravating DKD. Increasing availability of selective VP receptor antagonists opens new therapeutic windows separating the renal and extra-renal VP effects for the concrete applications. Improved understanding of these paradigms is mandatory for further drug design and translational implementation. The present concise review focuses on metabolic effects of VP affecting DKD pathophysiology.
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Affiliation(s)
- Svetlana Lebedeva
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Arus Margaryan
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Elena Smolyarchuk
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Andrey Nedorubov
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | - Maria Materenchuk
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
| | | | - Kerim Mutig
- Department of Pharmacology, Institute of Pharmacy, I.M. Sechenov First Moscow State Medical University, Moscow, Russia
- Department of Translational Physiology, Charité-Universitätsmedizin, Berlin, Germany
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3
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Watts JA, Arroyo JP. Rethinking Vasopressin: New Insights into Vasopressin Signaling and Its Implications. KIDNEY360 2023; 4:1174-1180. [PMID: 37357355 PMCID: PMC10476687 DOI: 10.34067/kid.0000000000000194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/06/2023] [Accepted: 06/06/2023] [Indexed: 06/27/2023]
Abstract
Vasopressin is a highly conserved peptide hormone that has been traditionally associated with water homeostasis. There is accumulating evidence in both humans and animal models that vasopressin is implicated in the regulation of metabolism. This review focuses on the effects that vasopressin exerts on the regulation of glucose and fatty acids with a particular emphasis on the potential repercussions of metabolic dysregulation in kidney disease.
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Affiliation(s)
- Jason A. Watts
- Epigenetics and Stem Cell Laboratory, National Institute of Environmental Health Sciences, National Institutes of Health, Research Triangle Park, North Carolina
| | - Juan Pablo Arroyo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
- Vanderbilt Center for Kidney Disease, Vanderbilt University Medical Center, Nashville, Tennessee
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4
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Mohan S, Flatt PR, Irwin N, Moffett RC. Weight-reducing, lipid-lowering and antidiabetic activities of a novel arginine vasopressin analogue acting at the V1a and V1b receptors in high-fat-fed mice. Diabetes Obes Metab 2021; 23:2215-2225. [PMID: 34105240 DOI: 10.1111/dom.14462] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/12/2021] [Revised: 06/02/2021] [Accepted: 06/04/2021] [Indexed: 12/30/2022]
Abstract
AIM To assess the beneficial metabolic effects of the nonapeptide hormone, arginine vasopressin (AVP), on metabolism. MATERIALS AND METHODS We exchanged amino acids at position 3 and 8 of AVP, namely phenylalanine and arginine, with those of oxytocin, to generate novel analogues with altered receptor selectivity. Secondary modification by N-terminal acetylation was used to impart stability to circulating endopeptidases. Analogues were screened for degradation, bioactivity in rodent/human clonal beta cells and primary murine islets, together with evaluation of receptor activation profile. RESULTS Analogue Ac3IV, which lacked effects at the V2 receptors responsible for modulation of fluid balance, was selected as the lead compound for assessment of antidiabetic efficacy in high-fat-fed mice. Twice-daily administration of Ac3IV, or the gold standard control exendin-4, for 22 days, reduced energy intake as well as body weight and fat content. Both interventions decreased circulating glucose levels, enhanced insulin sensitivity, and substantially improved glucose tolerance and related insulin secretion in response to an intraperitoneal or oral glucose challenge. The peptides decreased total- and increased HDL-cholesterol, but only Ac3IV decreased LDL-cholesterol, triglyceride and non-fasting glucagon concentrations. Elevations of islet and beta-cell areas were partially reversed, accompanied by suppressed islet cell proliferation, decreased beta-cell apoptosis and, in the case of exendin-4, also decreased alpha-cell apoptosis. CONCLUSION AVP-based therapies that exclusively target V1a and V1b receptors may have significant therapeutic potential for the treatment of obesity and related diabetes, and merit further clinical exploration.
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Affiliation(s)
- Shruti Mohan
- SAAD Centre for Pharmacy and Diabetes, University of Ulster, Coleraine, UK
| | - Peter R Flatt
- SAAD Centre for Pharmacy and Diabetes, University of Ulster, Coleraine, UK
| | - Nigel Irwin
- SAAD Centre for Pharmacy and Diabetes, University of Ulster, Coleraine, UK
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Yoshimura M, Conway-Campbell B, Ueta Y. Arginine vasopressin: Direct and indirect action on metabolism. Peptides 2021; 142:170555. [PMID: 33905792 PMCID: PMC8270887 DOI: 10.1016/j.peptides.2021.170555] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2020] [Revised: 04/12/2021] [Accepted: 04/15/2021] [Indexed: 02/07/2023]
Abstract
From its identification and isolation in 1954, arginine vasopressin (AVP) has attracted attention, not only for its peripheral functions such as vasoconstriction and reabsorption of water from kidney, but also for its central effects. As there is now considerable evidence that AVP plays a crucial role in feeding behavior and energy balance, it has become a promising therapeutic target for treating obesity or other obesity-related metabolic disorders. However, the underlying mechanisms for AVP regulation of these central processes still remain largely unknown. In this review, we will provide a brief overview of the current knowledge concerning how AVP controls energy balance and feeding behavior, focusing on physiological aspects including the relationship between AVP, circadian rhythmicity, and glucocorticoids.
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Affiliation(s)
- Mitsuhiro Yoshimura
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Japan; Translational Health Sciences, Bristol Medical School, University of Bristol, UK.
| | | | - Yoichi Ueta
- Department of Physiology, School of Medicine, University of Occupational and Environmental Health, Japan
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Jeong JK, Dow SA, Young CN. Sensory Circumventricular Organs, Neuroendocrine Control, and Metabolic Regulation. Metabolites 2021; 11:metabo11080494. [PMID: 34436435 PMCID: PMC8402088 DOI: 10.3390/metabo11080494] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2021] [Revised: 07/13/2021] [Accepted: 07/27/2021] [Indexed: 11/16/2022] Open
Abstract
The central nervous system is critical in metabolic regulation, and accumulating evidence points to a distributed network of brain regions involved in energy homeostasis. This is accomplished, in part, by integrating peripheral and central metabolic information and subsequently modulating neuroendocrine outputs through the paraventricular and supraoptic nucleus of the hypothalamus. However, these hypothalamic nuclei are generally protected by a blood-brain-barrier limiting their ability to directly sense circulating metabolic signals—pointing to possible involvement of upstream brain nuclei. In this regard, sensory circumventricular organs (CVOs), brain sites traditionally recognized in thirst/fluid and cardiovascular regulation, are emerging as potential sites through which circulating metabolic substances influence neuroendocrine control. The sensory CVOs, including the subfornical organ, organum vasculosum of the lamina terminalis, and area postrema, are located outside the blood-brain-barrier, possess cellular machinery to sense the metabolic interior milieu, and establish complex neural networks to hypothalamic neuroendocrine nuclei. Here, evidence for a potential role of sensory CVO-hypothalamic neuroendocrine networks in energy homeostasis is presented.
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Affiliation(s)
| | | | - Colin N. Young
- Correspondence: ; Tel.: +1-202-994-9575; Fax: +1-202-994-287
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Arroyo JP, Akwo EA, Terker AS, Alsouqi A, Bhave G, Harris RC, Hung AM, Ikizler TA. Peripheral Insulin Resistance Is Associated with Copeptin in Patients with Chronic Kidney Disease. KIDNEY360 2021; 2:1434-1440. [PMID: 35373107 PMCID: PMC8786142 DOI: 10.34067/kid.0002622021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/19/2021] [Accepted: 06/30/2021] [Indexed: 02/04/2023]
Abstract
Background Insulin resistance is associated with cardiovascular disease risk and worsened kidney function. Patients with CKD have higher levels of insulin resistance. Elevated levels of copeptin (a surrogate for vasopressin levels) have been associated with an increased incidence and progression of CKD, and with incident diabetes mellitus. The purpose of our study was to examine the relationship between insulin resistance, copeptin, and CKD. Methods We performed a cross-sectional study to investigate if insulin resistance was associated with higher copeptin levels in nondiabetic patients with stage 3-4 CKD versus controls. We measured plasma copeptin levels and used data from 52 patients with stage 3-4 CKD and 85 controls (eGFR ≥60 ml/min per 1.73 m2) enrolled in the Insulin Resistance in Chronic Kidney Disease (IRCKD) study. We then used a multivariable linear-regression model to assess the independent relationship between peripheral or hepatic insulin resistance and copeptin across levels of eGFR. Results We found that in patients with CKD (eGFR of 30-60 ml/min per 1.73 m2), but not in controls, peripheral insulin resistance was significantly correlated with higher levels of log copeptin (r=-0.21, P=0.04). In patients with CKD, when adjusted for age, sex, BMI, serum osmolality, log IL6, and log leptin/adiponectin ratio, each 1 SD decrease in insulin sensitivity was associated with a 39% increase in serum copeptin levels. The relationship between hepatic insulin resistance, copeptin, and eGFR is similar between controls and patients with reduced eGFR. Conclusion Peripheral insulin resistance is associated with elevated copeptin levels in nondiabetic patients with stage 3-4 CKD. Further research into how the interaction between peripheral insulin resistance and elevated vasopressin affects CKD progression could be of interest.
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Affiliation(s)
- Juan Pablo Arroyo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Elvis A. Akwo
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Andrew S. Terker
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Aseel Alsouqi
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee
| | - Gautam Bhave
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee
| | - Raymond C. Harris
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee,Department of Veterans Affairs, Nashville, Tennessee
| | - Adriana M. Hung
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee,Department of Veterans Affairs, Nashville, Tennessee
| | - T. Alp Ikizler
- Division of Nephrology and Hypertension, Department of Medicine, Vanderbilt University Medical Center, Nashville, Tennessee,Vanderbilt Center for Kidney Disease, Vanderbilt University School of Medicine, Nashville, Tennessee,Department of Veterans Affairs, Nashville, Tennessee
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8
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Kenkel W. Birth signalling hormones and the developmental consequences of caesarean delivery. J Neuroendocrinol 2021; 33:e12912. [PMID: 33145818 PMCID: PMC10590550 DOI: 10.1111/jne.12912] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/28/2020] [Revised: 10/05/2020] [Accepted: 10/06/2020] [Indexed: 12/12/2022]
Abstract
Rates of delivery by caesarean section (CS) are increasing around the globe and, although several epidemiological associations have already been observed between CS and health outcomes in later life, more are sure to be discovered as this practice continues to gain popularity. The components of vaginal delivery that protect offspring from the negative consequences of CS delivery in later life are currently unknown, although much attention to date has focused on differences in microbial colonisation. Here, we present the case that differing hormonal experiences at birth may also contribute to the neurodevelopmental consequences of CS delivery. Levels of each of the 'birth signalling hormones' (oxytocin, arginine vasopressin, epinephrine, norepinephrine and the glucocorticoids) are lower following CS compared to vaginal delivery, and there is substantial evidence for each that manipulations in early life results in long-term neurodevelopmental consequences. We draw from the research traditions of neuroendocrinology and developmental psychobiology to suggest that the perinatal period is a sensitive period, during which hormones achieve organisational effects. Furthermore, there is much to be learned from research on developmental programming by early-life stress that may inform research on CS, as a result of shared neuroendocrine mechanisms at work. We compare and contrast the effects of early-life stress with those of CS delivery and propose new avenues of research based on the links between the two bodies of literature. The research conducted to date suggests that the differences in hormone signalling seen in CS neonates may produce long-term neurodevelopmental consequences.
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Affiliation(s)
- William Kenkel
- Department of Psychological and Brain Sciences, University of Delaware, Newark, DE, USA
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Jansen LT, Suh H, Adams JD, Sprong CA, Seal AD, Scott DM, Butts CL, Melander O, Kirkland TW, Vanhaecke T, Dolci A, Lemetais G, Perrier ET, Kavouras SA. Osmotic stimulation of vasopressin acutely impairs glucose regulation: a counterbalanced, crossover trial. Am J Clin Nutr 2019; 110:1344-1352. [PMID: 31562496 DOI: 10.1093/ajcn/nqz236] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2019] [Accepted: 08/27/2019] [Indexed: 02/04/2023] Open
Abstract
BACKGROUND Epidemiological studies in humans show increased concentrations of copeptin, a surrogate marker of arginine vasopressin (AVP), to be associated with increased risk for type 2 diabetes. OBJECTIVES To examine the acute and independent effect of osmotically stimulated AVP, measured via the surrogate marker copeptin, on glucose regulation in healthy adults. METHODS Sixty subjects (30 females) participated in this crossover design study. On 2 trial days, separated by ≥7 d (males) or 1 menstrual cycle (females), subjects were infused for 120 min with either 0.9% NaCl [isotonic (ISO)] or 3.0% NaCl [hypertonic (HYPER)]. Postinfusion, a 240-min oral-glucose-tolerance test (OGTT; 75 g) was administered. RESULTS During HYPER, plasma osmolality and copeptin increased (P < 0.05) and remained elevated during the entire 6-h protocol, whereas renin-angiotensin-aldosterone system hormones were within the lower normal physiological range at the beginning of the protocol and declined following infusion. Fasting plasma glucose did not differ between trials (P > 0.05) at baseline and during the 120 min of infusion. During the OGTT the incremental AUC for glucose from postinfusion baseline (positive integer) was greater during HYPER (401.5 ± 190.5 mmol/L·min) compared with the ISO trial (354.0 ± 205.8 mmol/L·min; P < 0.05). The positive integer of the AUC for insulin during OGTT did not differ between trials (HYPER 55,850 ± 36,488 pmol/L·min compared with ISO 57,205 ± 31,119 pmol/L·min). Baseline values of serum glucagon were not different between the 2 trials; however, the AUC of glucagon during the OGTT was also significantly greater in HYPER (19,303 ± 3939 ng/L·min) compared with the ISO trial (18,600 ± 3755 ng/L·min; P < 0.05). CONCLUSIONS The present data indicate that acute osmotic stimulation of copeptin induced greater hyperglycemic responses during the oral glucose challenge, possibly due to greater glucagon concentrations.This study was registered at clinicaltrials.gov as NCT02761434.
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Affiliation(s)
| | - HyunGyu Suh
- Arizona State University, Hydration Science Lab, Phoenix, AZ, USA
| | - J D Adams
- Mayo Clinic, Division of Endocrinology, Rochester, Minneapolis, MN, USA
| | | | - Adam D Seal
- University of Arkansas, Fayetteville, AR, USA.,Arizona State University, Hydration Science Lab, Phoenix, AZ, USA
| | | | | | - Olle Melander
- Lund University, Division of Hypertension and Cardiovascular Disease, Malmø, Sweden
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Abstract
PURPOSE OF REVIEW The neurohypophysial endocrine system is identified here as a potential target for therapeutic interventions toward improving obesity-related metabolic dysfunction, given its coinciding pleiotropic effects on psychological, neurological and metabolic systems that are disrupted in obesity. RECENT FINDINGS Copeptin, the C-terminal portion of the precursor of arginine-vasopressin, is positively associated with body mass index and risk of type 2 diabetes. Plasma oxytocin is decreased in obesity and several other conditions of abnormal glucose homeostasis. Recent data also show non-classical tissues, such as myocytes, hepatocytes and β-cells, exhibit responses to oxytocin and vasopressin receptor binding that may contribute to alterations in metabolic function. The modulation of anorexigenic and orexigenic pathways appears to be the dominant mechanism underlying the effects of oxytocin and vasopressin on body weight regulation; however, there are apparent limitations associated with their use in direct pharmacological applications. A clearer picture of their wider physiological effects is needed before either system can be considered for therapeutic use.
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Affiliation(s)
| | - Faidon Magkos
- Department of Nutrition, Exercise and Sports-Section of Obesity Research, Faculty of Science, University of Copenhagen, Rolighedsvej 26, 1958 Frederiksberg C; Building 2-85, Room H134, Copenhagen, Denmark.
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11
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Muscogiuri G, Barrea L, Annunziata G, Vecchiarini M, Orio F, Di Somma C, Colao A, Savastano S. Water intake keeps type 2 diabetes away? Focus on copeptin. Endocrine 2018; 62:292-298. [PMID: 30027433 DOI: 10.1007/s12020-018-1680-7] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/23/2018] [Accepted: 07/09/2018] [Indexed: 12/11/2022]
Abstract
INTRODUCTION In both diabetic subjects and animal models high levels of vasopressin (AVP) have beendetected. The relationship between AVP and glucose metabolism is mediated through several direct andindirect effects and most of them are still unknown. METHODS We have reviewed 100 manuscripts retrieved from Cochrane Library, Embase and Pubmeddatabases in order to highlight a possible relationship between copeptin and type 2 diabetes and to provideinsights on the molecular mechanism that could explain this association. RESULTS AND CONCLUSIONS AVP potentiates CRH action at pituitary level resulting in an increased ACTH secretion and in turn in an increased cortisol secretion that escapes the negative feedback loop. Further, AVP regulates insulin and glucagon secretion through V1b receptor and promotes hepatic glycogenolysis and gluconeogenesis through V1a receptor. In addition to worsen glucose metabolism, AVP has been reported to have a role in the pathogenesis of diabetic complications such as cardiovascular diseases, kidney and ocular complications. Due to the very low concentration of AVP in the blood, the small size and poor stability, the assay of AVP is very difficult to perform. Thus, copeptin, the stable C-terminal portion of the prepro-vasopressin peptide has been identified as an easier assay to be measured and that mirrors AVP activity. Although there are promising evidence that copeptin could be involved in the pathogenesis of type 2 diabetes, further studies need to demonstrate the importance of copeptin as clinical marker to predict glucose metabolism derangements.
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Affiliation(s)
- Giovanna Muscogiuri
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy.
| | - Luigi Barrea
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Giuseppe Annunziata
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | | | - Francesco Orio
- Dipartimento di Scienze Motorie e del Benessere, Università Partenope di Napoli, Naples, Italy
| | | | - Annamaria Colao
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
| | - Silvia Savastano
- Dipartimento di Medicina Clinica e Chirurgia, Sezione di Endocrinologia, Università Federico II di Napoli, Naples, Italy
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Shimizu K, Nakamura K, Yokosuka M, Kondo Y. Modulation of male mouse sociosexual and anxiety-like behaviors by vasopressin receptors. Physiol Behav 2018; 197:37-41. [PMID: 30290180 DOI: 10.1016/j.physbeh.2018.09.016] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2018] [Revised: 08/18/2018] [Accepted: 09/28/2018] [Indexed: 11/30/2022]
Abstract
Although the involvement of two types of vasopressin (AVP) receptors, v1a and v1b, in neural regulation of social behavior is well documented in rodents, there is no report on combined actions of them in regulation of social behavior. In this study, we investigated behavioral differences between wild-type (WT) and v1a and v1b double knockout (dKO) mice. For this, we measured olfactory preference, sexual behavior with receptive females (four weekly tests) in an enriched large observation cage, and anxiety-like behaviors. No difference between WT and dKO mice was found in olfactory preferences for estrous female odor to male odor. Over all four mating tests, the number of mounts and pursuits after receptive females was significantly greater in dKO mice than in WT mice. In the elevated plus maze and the open field test, dKO mice showed lower anxiety-like behavior than WT mice. Finally, we measured approach behavior to several types of objects, figurines, and caged anestrous or estrous females placed in the open field apparatus. The only difference observed was that dKO mice spent longer in the vicinity of estrous females than did WT mice. These findings suggest that vasopressin receptors are involved in the regulation of sociosexual behavior, presumably partly mediated by emotional responses, in male mice.
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Affiliation(s)
- Kie Shimizu
- Department of Animal Sciences, Teikyo University of Science, Yamanashi, Japan; Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo, Japan
| | - Kazuaki Nakamura
- Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - Makoto Yokosuka
- Faculty of Veterinary Science, Nippon Veterinary and Life Science University, Tokyo, Japan
| | - Yasuhiko Kondo
- Department of Animal Sciences, Teikyo University of Science, Yamanashi, Japan.
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13
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Santoso P, Nakata M, Ueta Y, Yada T. Suprachiasmatic vasopressin to paraventricular oxytocin neurocircuit in the hypothalamus relays light reception to inhibit feeding behavior. Am J Physiol Endocrinol Metab 2018; 315:E478-E488. [PMID: 28174180 DOI: 10.1152/ajpendo.00338.2016] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
Abstract
Light synchronizes the body's circadian rhythms by modulating the master clock located in the suprachiasmatic nucleus (SCN) of the hypothalamus. In modern lifestyles that run counter to normal circadian rhythms, the extended and/or irregular light exposure impairs circadian rhythms and, consequently, promotes feeding and metabolic disorders. However, the neuronal pathway through which light is coupled to feeding behavior is less elucidated. The present study employed the light exposure during the dark phase of the day in rats and observed its effect on neuronal activity and feeding behavior. Light exposure acutely suppressed food intake and elevated c-Fos expression in the AVP neurons of SCN and the oxytocin (Oxt) neurons of paraventricular nucleus (PVN) in the hypothalamus. The light-induced suppression of food intake was abolished by blockade of the Oxt receptor in the brain. Retrograde tracer analysis demonstrated the projection of SCN AVP neurons to the PVN. Furthermore, intracerebroventricular injection of AVP suppressed food intake and increased c-Fos in PVN Oxt neurons. Intra-PVN injection of AVP exerted a stronger anorexigenic effect than intracerebroventriclar injection. AVP also induced intracellular Ca2+ signaling and increased firing frequency in Oxt neurons in PVN slices. These results reveal the novel neurocircuit from SCN AVP to PVN Oxt that relays light reception to inhibition of feeding behavior. This light-induced neurocircuit may serve as a pathway for forming the circadian feeding rhythm and linking irregular light exposure to arrhythmic feeding and, consequently, obesity and metabolic diseases.
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Affiliation(s)
- Putra Santoso
- Department of Physiology, Division of Integrative Physiology, Jichi Medical University School of Medicine, Shimotsuke, Tochigi , Japan
| | - Masanori Nakata
- Department of Physiology, Division of Integrative Physiology, Jichi Medical University School of Medicine, Shimotsuke, Tochigi , Japan
| | - Yoichi Ueta
- Department of Physiology, University of Occupational and Environmental Health , Kitakyushu , Japan
| | - Toshihiko Yada
- Department of Physiology, Division of Integrative Physiology, Jichi Medical University School of Medicine, Shimotsuke, Tochigi , Japan
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Yamaguchi Y, Okamura H. Vasopressin Signal Inhibition in Aged Mice Decreases Mortality under Chronic Jet Lag. iScience 2018; 5:118-122. [PMID: 30240642 PMCID: PMC6123867 DOI: 10.1016/j.isci.2018.06.008] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 05/31/2018] [Accepted: 06/19/2018] [Indexed: 11/25/2022] Open
Abstract
Chronic jet lag, a model of shiftwork, increases mortality in aged mice. One potential reason for this association is that the chronic desynchronization between the internal clock phase and the environmental light/dark (LD) cycle might increase the mortality rate. However, this hypothesis has not been examined because of the lack of an appropriate animal model to prove this speculation. Here, we found that rapidly entrainable vasopressin receptor V1a–/–V1b–/– mice showed lower mortality under a chronic jet lag condition. Moreover, we found that pharmacological inactivation of V1a and V1b signaling decreased mortality even in aged wild-type mice, thus providing a potential pharmaceutical intervention for shiftwork-related health problems. Chronic jet lag increases mortality in aged mice Rapidly resetting V1a–/–V1b–/– mice showed lower mortality under chronic jet lag Pharmacological inactivation of V1a/V1b signaling decreased mortality in aged WT mice A potential pharmaceutical intervention for shiftwork-related health problems
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Affiliation(s)
- Yoshiaki Yamaguchi
- Department of Systems Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan
| | - Hitoshi Okamura
- Department of Systems Biology, Graduate School of Pharmaceutical Sciences, Kyoto University, Sakyo-ku, Kyoto 606-8501, Japan.
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15
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Nakamura K, Velho G, Bouby N. Vasopressin and metabolic disorders: translation from experimental models to clinical use. J Intern Med 2017; 282:298-309. [PMID: 28688111 DOI: 10.1111/joim.12649] [Citation(s) in RCA: 37] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
Abstract
Vasopressin has many physiological actions in addition to its well-defined role in the control of fluid homeostasis and urine concentration. An increasing body of evidence suggests that the vasopressin-hydration axis plays a role in glucose homeostasis. This review summarizes the knowledge accumulated over the last decades about the influence of vasopressin in the short-term regulation of glycaemia. It describes the possible role of this hormone through activation of V1a and V1b receptors on liver and pancreas functions and on the hypothalamic-pituitary-adrenal axis. Moreover, we report recent in vivo studies demonstrating the role of vasopressin in the long-term regulation of glycaemia. Indeed, V1a- or double-V1aV1b-receptor knockout mice display significant changes in the glucose and lipid metabolism. In rats, sustained high V1aR activation increases basal glycaemia and aggravates glucose intolerance in obese rats. Finally, the translation from animal findings to human was evidenced by epidemiological and genetic studies that showed that high vasopressin level is a risk factor for hyperglycaemia, metabolic disorders and diabetes.
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Affiliation(s)
- K Nakamura
- Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan
| | - G Velho
- INSERM U 1138, Centre de Recherches des Cordeliers, Paris, France
| | - N Bouby
- INSERM U 1138, Centre de Recherches des Cordeliers, Paris, France
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16
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Taveau C, Chollet C, Bichet DG, Velho G, Guillon G, Corbani M, Roussel R, Bankir L, Melander O, Bouby N. Acute and chronic hyperglycemic effects of vasopressin in normal rats: involvement of V 1A receptors. Am J Physiol Endocrinol Metab 2017; 312:E127-E135. [PMID: 27998960 DOI: 10.1152/ajpendo.00269.2016] [Citation(s) in RCA: 30] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/07/2016] [Revised: 10/25/2016] [Accepted: 12/12/2016] [Indexed: 11/22/2022]
Abstract
Recent epidemiological studies have revealed novel relationships between low water intake or high vasopressin (AVP) and the risk of hyperglycemia and diabetes. AVP V1A and V1B receptors (R) are expressed in the liver and pancreatic islets, respectively. The present study was designed to determine the impact of different levels of circulating AVP on glucose homeostasis in normal Sprague-Dawley rats, as well as the respective roles of V1AR and V1BR. We showed that acute injection of AVP induces a dose-dependent increase in glycemia. Pretreatment with a selective V1AR antagonist, but not a V1BR antagonist, dose-dependently prevented the rise in glycemia. V1BR antagonism did not modify the hyperinsulinemic response, resulting from AVP-induced hyperglycemia, but enhanced the fall in glucagonemia. Acute administration of selective V1AR or V1BR agonists confirmed the involvement of V1AR in the hyperglycemic effect of AVP. In chronic experiments, AVP levels were altered in both directions. Sustained AVP infusion through implantable minipumps induced a time-dependent increase in fasting glycemia, whereas lowering endogenous AVP by increasing water intake had no effect. After 4 wk of AVP infusion, the rise in glycemia amounted to 1.1 mmol/l (P < 0.01) without significant change in insulinemia. This effect was attenuated by cotreatment with a V1AR antagonist. Similar results were observed in lean Zucker rats. These findings demonstrate for the first time a causal link between chronic high AVP and hyperglycemia through V1AR activation and, thus, provide a pathophysiological explanation for the relationship observed in human cohorts between the AVP-hydration axis and the risk of diabetes.
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Affiliation(s)
- Christopher Taveau
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France
- Université Pierre et Marie Curie, Paris, France
- Université Paris Descartes, Paris, France
| | - Catherine Chollet
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France
- Université Pierre et Marie Curie, Paris, France
- Université Paris Descartes, Paris, France
| | - Daniel G Bichet
- Department of Physiology and Medicine, Sacré-Coeur Hospital, Montreal, Canada
| | - Gilberto Velho
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France
| | - Gilles Guillon
- INSERM U1191, Institut de Génomique Fonctionnelle, Montpellier, France
- Centre Nationnal de la Recherche Scientifique, UMR 5203, Montpellier France
- Université de Montpellier, Montpellier, France
| | - Maithe Corbani
- INSERM U1191, Institut de Génomique Fonctionnelle, Montpellier, France
- Centre Nationnal de la Recherche Scientifique, UMR 5203, Montpellier France
- Université de Montpellier, Montpellier, France
| | - Ronan Roussel
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France
- Université Paris Diderot, Paris, France
- Department of Diabetology-Endocrinology-Nutrition, Departement Hospitalo Universitaire Fibrosis, Inflammation and Remodeling, Bichat Hospital, Assistance Publique-Hôpitaux de Paris, Paris, France
| | - Lise Bankir
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France
- Université Pierre et Marie Curie, Paris, France
- Université Paris Descartes, Paris, France
| | - Olle Melander
- Department of Clinical Sciences, Malmö, Lund University, Malmö, Sweden; and
- Department of Internal Medicine, Malmö, Skåne University Hospital, Malmö, Sweden
| | - Nadine Bouby
- Institut National de la Santé et de la Recherche Médicale (INSERM), Centre de Recherche des Cordeliers, Paris, France;
- Université Pierre et Marie Curie, Paris, France
- Université Paris Descartes, Paris, France
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Loewen SP, Ferguson AV. Adropin acts in the rat paraventricular nucleus to influence neuronal excitability. Am J Physiol Regul Integr Comp Physiol 2017; 312:R511-R519. [PMID: 28100478 DOI: 10.1152/ajpregu.00517.2016] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2016] [Revised: 01/13/2017] [Accepted: 01/14/2017] [Indexed: 01/28/2023]
Abstract
Adropin is a peptide hormone with cardiovascular and metabolic roles in the periphery, including effects on glucose and lipid homeostasis. Central administration of adropin has been shown to inhibit water intake in rats; however, the site at which central adropin acts has yet to be elucidated. The hypothalamic paraventricular nucleus (PVN), a critical autonomic control center, plays essential roles in the control of fluid balance, energy homeostasis, and cardiovascular regulation, and is, therefore, a potential target for centrally acting adropin. In the present study, we used whole cell patch-clamp techniques to examine the effects of adropin on the excitability of neurons within the PVN. All three neuronal subpopulations (magnocellular, preautonomic, and neuroendocrine) in the PVN were found to be responsive to bath-application of 10 nM adropin, which elicited responses in 68% of cells tested (n = 57/84). The majority of cells (58%) depolarized (5.2 ± 0.3 mV; n = 49) in response to adropin, whereas the remaining responsive cells (10%) hyperpolarized (-3.4 ± 0.5 mV; n = 8), effects that were shown to be concentration-dependent. Additionally, responses were maintained in the presence of 1 μM TTX in 75% of cells tested (n = 9/12), and voltage-clamp analysis revealed that adropin had no effect on the amplitude or frequency of excitatory or inhibitory postsynaptic currents (EPSCs and IPSCs) in PVN neurons, suggesting the peptide exerts direct, postsynaptic actions on these neurons. Collectively, these findings suggest central adropin may exert its physiological effects through direct actions on neurons in the PVN.
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Affiliation(s)
- Spencer P Loewen
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
| | - Alastair V Ferguson
- Department of Biomedical and Molecular Sciences, Queen's University, Kingston, Ontario, Canada
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18
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Roussel R, El Boustany R, Bouby N, Potier L, Fumeron F, Mohammedi K, Balkau B, Tichet J, Bankir L, Marre M, Velho G. Plasma Copeptin, AVP Gene Variants, and Incidence of Type 2 Diabetes in a Cohort From the Community. J Clin Endocrinol Metab 2016; 101:2432-9. [PMID: 27049477 PMCID: PMC4891798 DOI: 10.1210/jc.2016-1113] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
CONTEXT Experimental data support a role for vasopressin in metabolic disorders. OBJECTIVE We investigated associations of plasma copeptin, a surrogate of vasopressin, and of allelic variations in the arginine vasopressin-neurophysin II gene with insulin secretion, insulin sensitivity, and the risk for impaired fasting glucose (IFG) and type 2 diabetes mellitus (T2DM). DESIGN, SETTING, AND PARTICIPANTS We studied 5110 unrelated French men and women from a prospective cohort of the general population (Data from Epidemiological Study on the Insulin Resistance Syndrome cohort, 9-y follow-up). Six single nucleotide polymorphisms were genotyped. MAIN OUTCOME MEASURE Incidence of IFG or T2DM during follow-up. RESULTS The incidence of hyperglycemia (IFG/T2DM) during follow-up by quartiles of baseline plasma copeptin was 11.0% (Q1), 14.5% (Q2), 17.0% (Q3), and 23.5% (Q4), log-rank test P = .003. Participants in the upper quartile of plasma copeptin had significantly lower insulin sensitivity (homeostasis model assessment index) at baseline and during follow-up, as compared with other participants. Cox proportional hazards regression analyses showed significant associations of the CC genotype of rs6084264, the TT genotype of rs2282018, the C-allele of rs2770381, and the CC genotype of rs1410713 with the incidence of hyperglycemia. The genotypes associated with an increased risk of hyperglycemia were also associated with increased plasma copeptin in men but not in women. CONCLUSIONS High plasma copeptin was associated with reduced insulin sensitivity and an increased risk for IFG/T2DM diabetes in this community-based cohort. Moreover, in men, allelic associations support a causal role for vasopressin in these disorders.
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Affiliation(s)
- Ronan Roussel
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Ray El Boustany
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Nadine Bouby
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Louis Potier
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Frédéric Fumeron
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Kamel Mohammedi
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Beverley Balkau
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Jean Tichet
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Lise Bankir
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Michel Marre
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
| | - Gilberto Velho
- INSERM, UMR_S 1138, Centre de Recherche des Cordeliers (R.R., R.E.B., N.B., L.P., F.F., K.M., L.B., M.M., G.V.), 75006 Paris, France; Université Paris Diderot, Sorbonne Paris Cité, UFR de Médecine, and Assistance Publique Hôpitaux de Paris, Hôpital Bichat, Département Hospitalo-Universitaire FIRE, Service de Diabétologie, Endocrinologie et Nutrition (R.R., L.P., K.M., M.M.), 75018 Paris, France; Sorbonne Universités, Université Pierre et Marie Curie - Paris 06, UMR_S 1138, Centre de Recherche des Cordeliers (R.E.B., N.B., L.B.), 75006 Paris, France; INSERM Unité de Recherche 1018, Centre de Recherche en Epidémiologie et Santé des Populations, and Université Paris Sud (B.B.), 94800 Villejuif, France; and IRSA (J.T.), 37520 La Riche, France
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Tran TDN, Yao S, Hsu WH, Gimble JM, Bunnell BA, Cheng H. Arginine vasopressin inhibits adipogenesis in human adipose-derived stem cells. Mol Cell Endocrinol 2015; 406:1-9. [PMID: 25697345 PMCID: PMC4752440 DOI: 10.1016/j.mce.2015.02.009] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2014] [Revised: 01/15/2015] [Accepted: 02/09/2015] [Indexed: 11/27/2022]
Abstract
Intracellular Ca(2+) signaling is important for stem cell differentiation and there is evidence it may coordinate the process. Arginine vasopressin (AVP) is a neuropeptide hormone secreted mostly from the posterior pituitary gland and increases Ca(2+) signals mainly via V1 receptors. However, the role of AVP in adipogenesis of human adipose-derived stem cells (hASCs) is unknown. In this study, we identified the V1a receptor gene in hASCs and demonstrated that AVP stimulation increased intracellular Ca(2+) concentration during adipogenesis. This effect was mediated via V1a receptors, Gq-proteins and the PLC-IP3 pathway. These Ca(2+) signals were due to endoplasmic reticulum release and influx from the extracellular space. Furthermore, AVP supplementation to the adipogenic medium decreased the number of adipocytes and adipocyte marker genes during differentiation. The effect of AVP on adipocyte formation was reversed by the V1a receptor blocker V2255. These findings suggested that AVP may function to inhibit adipocyte differentiation.
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Affiliation(s)
- Tran D N Tran
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Shaomian Yao
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA
| | - Walter H Hsu
- Department of Biomedical Sciences, College of Veterinary Medicine, Iowa State University, Ames, IA 50011, USA
| | - Jeffrey M Gimble
- Stem Cell Biology Laboratory, Pennington Biomedical Research Center, Louisiana State University, Baton Rouge, LA 70808, USA
| | - Bruce A Bunnell
- Department of Pharmacology, Tulane Center for Stem Cell Research and Regenerative Medicine and Division of Regenerative Medicine of Tulane National Primate Research Center, Tulane University Health Sciences Center, New Orleans, LA 70112, USA
| | - Henrique Cheng
- Department of Comparative Biomedical Sciences, School of Veterinary Medicine, Louisiana State University, Baton Rouge, LA 70803, USA.
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20
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Taveau C, Chollet C, Waeckel L, Desposito D, Bichet DG, Arthus MF, Magnan C, Philippe E, Paradis V, Foufelle F, Hainault I, Enhorning S, Velho G, Roussel R, Bankir L, Melander O, Bouby N. Vasopressin and hydration play a major role in the development of glucose intolerance and hepatic steatosis in obese rats. Diabetologia 2015; 58:1081-90. [PMID: 25622862 DOI: 10.1007/s00125-015-3496-9] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/05/2014] [Accepted: 12/22/2014] [Indexed: 12/11/2022]
Abstract
AIMS/HYPOTHESIS High plasma copeptin, a marker of vasopressin (VP) secretion, has been shown to be associated with the metabolic syndrome and development of type 2 diabetes in humans. The present study was designed to determine the long-term influence of plasma VP concentration in a rodent model prone to metabolic dysfunction. METHODS Obese Zucker rats and their lean counterparts were submitted for 4 weeks to one of three protocols inducing different levels of VP. Circulating VP was either reduced by increasing the daily water intake (low-VP), or increased by a chronic i.p. infusion of VP (high-VP). The control rats had normal VP levels that depended on their own regulation of water intake and VP secretion. RESULTS Compared with controls with normal VP, lean rats with high-VP had a higher fasting glycaemia after 4 weeks. In obese rats, high-VP promoted hyperinsulinaemia, glucose intolerance, assessed by glucose and insulin tolerance tests, and an impaired response to a pyruvate challenge. Conversely, treatment with a selective arginine vasopressin receptor 1A (V1aR) antagonist reduced glucose intolerance. Low-VP obese rats had unchanged glucose tolerance but exhibited a drastic decrease in liver steatosis compared with control obese rats, associated with low hepatic triacylglycerol and cholesterol content, and reduced expression of hepatic lipogenic genes. These effects were independent of changes in body adiposity, and plasma sodium and osmolality did not differ among groups. CONCLUSION/INTERPRETATION These findings show a causal relationship between the VP-hydration axis and the metabolic risk. Therapeutic perspectives include diet recommendations regarding hydration, but also potential pharmacological interventions targeting the VP V1aR.
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Affiliation(s)
- Christopher Taveau
- Inserm U1138, Centre de Recherche des Cordeliers, 15 rue de l'Ecole de Medecine, 75006, Paris, France
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Aoyagi T, Higa JK, Aoyagi H, Yorichika N, Shimada BK, Matsui T. Cardiac mTOR rescues the detrimental effects of diet-induced obesity in the heart after ischemia-reperfusion. Am J Physiol Heart Circ Physiol 2015; 308:H1530-9. [PMID: 25888508 DOI: 10.1152/ajpheart.00008.2015] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/07/2015] [Accepted: 04/10/2015] [Indexed: 01/22/2023]
Abstract
Diet-induced obesity deteriorates the recovery of cardiac function after ischemia-reperfusion (I/R) injury. While mechanistic target of rapamycin (mTOR) is a key mediator of energy metabolism, the effects of cardiac mTOR in ischemic injury under metabolic syndrome remains undefined. Using cardiac-specific transgenic mice overexpressing mTOR (mTOR-Tg mice), we studied the effect of mTOR on cardiac function in both ex vivo and in vivo models of I/R injury in high-fat diet (HFD)-induced obese mice. mTOR-Tg and wild-type (WT) mice were fed a HFD (60% fat by calories) for 12 wk. Glucose intolerance and insulin resistance induced by the HFD were comparable between WT HFD-fed and mTOR-Tg HFD-fed mice. Functional recovery after I/R in the ex vivo Langendorff perfusion model was significantly lower in HFD-fed mice than normal chow diet-fed mice. mTOR-Tg mice demonstrated better cardiac function recovery and had less of the necrotic markers creatine kinase and lactate dehydrogenase in both feeding conditions. Additionally, mTOR overexpression suppressed expression of proinflammatory cytokines, including IL-6 and TNF-α, in both feeding conditions after I/R injury. In vivo I/R models showed that at 1 wk after I/R, HFD-fed mice exhibited worse cardiac function and larger myocardial scarring along myofibers compared with normal chow diet-fed mice. In both feeding conditions, mTOR overexpression preserved cardiac function and prevented myocardial scarring. These findings suggest that cardiac mTOR overexpression is sufficient to prevent the detrimental effects of diet-induced obesity on the heart after I/R, by reducing cardiac dysfunction and myocardial scarring.
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Affiliation(s)
- Toshinori Aoyagi
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Jason K Higa
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Hiroko Aoyagi
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Naaiko Yorichika
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Briana K Shimada
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
| | - Takashi Matsui
- Department of Anatomy, Biochemistry and Physiology, Center for Cardiovascular Research, John A. Burns School of Medicine, University of Hawaii, Honolulu, Hawaii
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Filippatos TD, Elisaf MS. Hyponatremia in patients with heart failure. World J Cardiol 2013; 5:317-328. [PMID: 24109495 PMCID: PMC3783984 DOI: 10.4330/wjc.v5.i9.317] [Citation(s) in RCA: 46] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/23/2013] [Revised: 07/30/2013] [Accepted: 08/17/2013] [Indexed: 02/06/2023] Open
Abstract
The present review analyses the mechanisms relating heart failure and hyponatremia, describes the association of hyponatremia with the progress of disease and morbidity/mortality in heart failure patients and presents treatment options focusing on the role of arginine vasopressin (AVP)-receptor antagonists. Hyponatremia is the most common electrolyte disorder in the clinical setting and in hospitalized patients. Patients with hyponatremia may have neurologic symptoms since low sodium concentration produces brain edema, but the rapid correction of hyponatremia is also associated with major neurologic complications. Patients with heart failure often develop hyponatremia owing to the activation of many neurohormonal systems leading to decrease of sodium levels. A large number of clinical studies have associated hyponatremia with increased morbidity and mortality in patients hospitalized for heart failure or outpatients with chronic heart failure. Treatment options for hyponatremia in heart failure, such as water restriction or the use of hypertonic saline with loop diuretics, have limited efficacy. AVP-receptor antagonists increase sodium levels effectively and their use seems promising in patients with hyponatremia. However, the effects of AVP-receptor antagonists on hard outcomes in patients with heart failure and hyponatremia have not been thoroughly examined.
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Mullis K, Kay K, Williams DL. Oxytocin action in the ventral tegmental area affects sucrose intake. Brain Res 2013; 1513:85-91. [PMID: 23548602 PMCID: PMC3739708 DOI: 10.1016/j.brainres.2013.03.026] [Citation(s) in RCA: 93] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 03/20/2013] [Accepted: 03/23/2013] [Indexed: 11/16/2022]
Abstract
Brain oxytocin is known to play a role in the control of food intake, and recent studies suggest that stimulation of central oxytocin receptors selectively suppresses carbohydrate intake. The specific oxytocin projection sites and receptor populations involved in this response are as yet unidentified. We hypothesized that oxytocin receptors in the ventral tegmental area (VTA) may play a role in limiting sucrose intake, because the VTA is known to influence palatable food intake. We first performed a dose response study in which we observed that intra-VTA oxytocin injection significantly suppressed intake of a 10% sucrose solution during a 30-min test session by 13.35-20.5% relative to vehicle treatment. Doses of intra-VTA oxytocin that suppressed sucrose intake had no effect on water intake. Next we examined the effects of two oxytocin receptor antagonists, (d(CH2)5(1),Tyr(Me)(2),Orn(8))-Oxytocin (OVT) and L-368,899. Each of these antagonists significantly increased 10% sucrose intake by 17-20.5% relative to vehicle when delivered directly into the VTA, at doses subthreshold for effect if injected into the cerebral ventricles. Finally, we observed that the effect of intra-VTA oxytocin to suppress 10% sucrose intake was significantly attenuated by pretreatment with L-368,899, supporting the suggestion that the VTA oxytocin treatment suppresses intake through action at oxytocin receptors. These findings support the suggestion that endogenous oxytocin action within the VTA suppresses sucrose intake. We conclude that oxytocin receptors in the VTA play a physiologic role in the control of sucrose ingestion.
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Affiliation(s)
- Kiersten Mullis
- Department of Psychology & Program in Neuroscience Florida State University, Box 3064301, Tallahassee FL, 32036-4301 USA
| | - Kristen Kay
- Department of Psychology & Program in Neuroscience Florida State University, Box 3064301, Tallahassee FL, 32036-4301 USA
| | - Diana L. Williams
- Department of Psychology & Program in Neuroscience Florida State University, Box 3064301, Tallahassee FL, 32036-4301 USA
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Koshimizu TA, Nakamura K, Egashira N, Hiroyama M, Nonoguchi H, Tanoue A. Vasopressin V1a and V1b Receptors: From Molecules to Physiological Systems. Physiol Rev 2012; 92:1813-64. [DOI: 10.1152/physrev.00035.2011] [Citation(s) in RCA: 250] [Impact Index Per Article: 20.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022] Open
Abstract
The neurohypophysial hormone arginine vasopressin (AVP) is essential for a wide range of physiological functions, including water reabsorption, cardiovascular homeostasis, hormone secretion, and social behavior. These and other actions of AVP are mediated by at least three distinct receptor subtypes: V1a, V1b, and V2. Although the antidiuretic action of AVP and V2 receptor in renal distal tubules and collecting ducts is relatively well understood, recent years have seen an increasing understanding of the physiological roles of V1a and V1b receptors. The V1a receptor is originally found in the vascular smooth muscle and the V1b receptor in the anterior pituitary. Deletion of V1a or V1b receptor genes in mice revealed that the contributions of these receptors extend far beyond cardiovascular or hormone-secreting functions. Together with extensively developed pharmacological tools, genetically altered rodent models have advanced the understanding of a variety of AVP systems. Our report reviews the findings in this important field by covering a wide range of research, from the molecular physiology of V1a and V1b receptors to studies on whole animals, including gene knockout/knockdown studies.
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Affiliation(s)
- Taka-aki Koshimizu
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
| | - Kazuaki Nakamura
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
| | - Nobuaki Egashira
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
| | - Masami Hiroyama
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
| | - Hiroshi Nonoguchi
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
| | - Akito Tanoue
- Department of Pharmacology, Division of Molecular Pharmacology, Jichi Medical University, Tochigi, Japan; Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan; Department of Pharmacy, Kyushu University Hospital, Fukuoka, Japan; and Department of Internal Medicine, Kitasato University, Kitasato Institute Medical Center Hospital, Saitama, Japan
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Abbasi A, Corpeleijn E, Meijer E, Postmus D, Gansevoort RT, Gans ROB, Struck J, Hillege HL, Stolk RP, Navis G, Bakker SJL. Sex differences in the association between plasma copeptin and incident type 2 diabetes: the Prevention of Renal and Vascular Endstage Disease (PREVEND) study. Diabetologia 2012; 55:1963-70. [PMID: 22526609 DOI: 10.1007/s00125-012-2545-x] [Citation(s) in RCA: 52] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/12/2012] [Accepted: 03/12/2012] [Indexed: 12/18/2022]
Abstract
AIMS/HYPOTHESIS Vasopressin plays a role in osmoregulation, glucose homeostasis and inflammation. Therefore, plasma copeptin, the stable C-terminal portion of the precursor of vasopressin, has strong potential as a biomarker for the cardiometabolic syndrome and diabetes. Previous results were contradictory, which may be explained by differences between men and women in responsiveness of the vasopressin system. The aim of this study was to evaluate the usefulness of copeptin for prediction of future type 2 diabetes in men and women separately. METHODS From the Prevention of Renal and Vascular Endstage Disease (PREVEND) study, 4,063 women and 3,909 men without diabetes at baseline were included. A total of 208 women and 288 men developed diabetes during a median follow-up of 7.7 years. RESULTS In multivariable-adjusted models, we observed a stronger association of copeptin with risk of future diabetes in women (OR 1.49 [95% CI 1.24, 1.79]) than in men (OR 1.01 [95% CI 0.85, 1.19]) (p (interaction) < 0.01). The addition of copeptin to the Data from the Epidemiological Study on the Insulin Resistance Syndrome (DESIR) clinical model improved the discriminative value (C-statistic,+0.007, p = 0.02) and reclassification (integrated discrimination improvement [IDI] = 0.004, p < 0.01) in women. However, we observed no improvement in men. The additive value of copeptin in women was maintained when other independent predictors, such as glucose, high sensitivity C-reactive protein (hs-CRP) and 24 h urinary albumin excretion (UAE), were included in the model. CONCLUSIONS/INTERPRETATION The association of plasma copeptin with the risk of developing diabetes was stronger in women than in men. Plasma copeptin alone, and along with existing biomarkers (glucose, hs-CRP and UAE), significantly improved the risk prediction for diabetes in women.
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Affiliation(s)
- A Abbasi
- Department of Epidemiology, University of Groningen, University Medical Center Groningen, Hanzeplein 1, PO Box 30.001, 9700 RB Groningen, the Netherlands.
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Abstract
Heart failure is one of the most common, costly, disabling and growing diseases (McMurray and Pfeffer in Lancet 365(9474):1877-1889, 2005). Hyponatremia, conventionally defined as a serum-sodium concentration equal or less than 135 mmol/l (American Heart Association in Heart disease and stroke statistics--2007 update. American Heart Association, Dallas, 2007; Stewart et al. in Eur J Heart Fail 4:361-371, 2002), is a common phenomenon in patients with heart failure, with an incidence of 20-25% (Krumholz et al. in Arch Intern Med 157:e99-e104, 1997; Rosamond et al. in Circulation 117(4):e25-e146, 2008; Adrogue and Madias in N Engl J Med 342:1581-1589, 2000) and seems to be of prognostic importance in patients with heart failure (Luca et al. in Am J Cardiol 96:19L-23L, 2005; Gheorghiade et al. in Eur Heart J 28:980-988, 2007; Gheorghiade et al. in Arch Intern Med 167:1998-2005, 2007). So far treatment strategies have been limited and burdened by side effects. The development of hyponatremia in the setting of heart failure is related to the arginine vasopressin (AVP) dysregulation. Thus, AVP receptor antagonists are a promising approach to treatment. However, several questions remain: whether there is a cause-and-effect mechanism, if the correction of hyponatremia improves outcomes, and defining the specific cut-off level of serum-sodium that should be used to define hyponatremia. In this review, we aim to summarize the literature on hyponatremia in patients with heart failure within several aspects: incidence in clinical trials and registries, prognostic value, underlying mechanisms, therapeutic options, and possible future perspectives.
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Affiliation(s)
- Luca Bettari
- University of the Studies of Brescia, Piazzale Spedali Civili 1, Brescia, Italy.
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Nakamura K, Yamashita T, Fujiki H, Aoyagi T, Yamauchi J, Mori T, Tanoue A. Enhanced glucose tolerance in the Brattleboro rat. Biochem Biophys Res Commun 2011; 405:64-7. [PMID: 21215256 DOI: 10.1016/j.bbrc.2010.12.126] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2010] [Accepted: 12/20/2010] [Indexed: 12/23/2022]
Abstract
[Arg(8)]-vasopressin (AVP) plays a crucial role in regulating body fluid retention, which is mediated through the vasopressin V(2) receptor in the kidney. In addition, AVP is involved in the regulation of glucose homeostasis via vasopressin V(1A) and vasopressin V(1B) receptors. Our previous studies demonstrated that vasopressin V(1A) receptor-deficient (V(1A)R-/-) and V(1B) receptor-deficient (V(1B)R-/-) mice exhibited hyperglycemia and hypoglycemia with hypoinsulinemia, respectively. These findings indicate that vasopressin V(1A) receptor deficiency results in decreased insulin sensitivity whereas vasopressin V(1B) receptor deficiency results in increased insulin sensitivity. In addition, vasopressin V(1A) and vasopressin V(1B) receptor double-deficient (V(1AB)R-/-) mice exhibited impaired glucose tolerance, suggesting that the effects of vasopressin V(1B) receptor deficiency do not influence the development of hyperglycemia promoted by vasopressin V(1A) receptor deficiency, and that the blockage of both receptors could lead to impaired glucose tolerance. However, the contributions of the entire AVP/vasopressin receptors system to the regulation of blood glucose have not yet been clarified. In this study, to further understand the role of AVP/vasopressin receptors signaling in blood glucose regulation, we assessed the glucose tolerance of AVP-deficient homozygous Brattleboro (di/di) rats using an oral glucose tolerance test (GTT). Plasma glucose and insulin levels were consistently lower in homozygous di/di rats than in heterozygous di/+ rats during the GTT, suggesting that the blockage of all AVP/vasopressin receptors resulting from the AVP deficiency could lead to enhanced glucose tolerance.
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Affiliation(s)
- Kazuaki Nakamura
- Department of Pharmacology, National Research Institute for Child Health and Development, Tokyo, Japan
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Küchler S, Perwitz N, Schick RR, Klein J, Westphal S. Arginine-vasopressin directly promotes a thermogenic and pro-inflammatory adipokine expression profile in brown adipocytes. ACTA ACUST UNITED AC 2010; 164:126-32. [PMID: 20594991 DOI: 10.1016/j.regpep.2010.05.016] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2010] [Revised: 05/07/2010] [Accepted: 05/30/2010] [Indexed: 12/30/2022]
Abstract
Arginine-vasopressin (AVP) - via activation of the hypothalamic-pituitary-adrenal (HPA) axis - may play a role in the regulation of energy homeostasis and related cardiovascular complications. Brown adipose tissue (BAT) - via dissipation of energy in the form of heat - contributes to whole body energy balance. BAT expresses vasopressin receptors. We investigated direct effects of AVP on brown adipose endocrine and metabolic functions. UCP-1 protein expression in differentiated brown adipocytes was induced after acute exposure of adipocytes to AVP. This effect was time-dependent with a maximum increase after 8h. AVP also induced a time- and dose-dependent increase in p38 MAP kinase phosphorylation. Pharmacological inhibition of p38 MAP kinase with SB 202190 abolished the induction of UCP-1 protein expression. Furthermore, while acute AVP treatment enhanced mRNA expression of MCP-1 and IL-6, adiponectin mRNA expression was reduced. Yet, on the level of intracellular glucose uptake, there was no AVP-induced change of adipose insulin-induced glucose uptake. Finally, there was no difference in lipid accumulation between control and AVP-treated cells. Taken together, our data demonstrate direct effects of AVP on thermogenic, inflammatory, and glucoregulatory gene expression in brown adipocytes, thus expanding the hitherto known spectrum of this neuropeptides's biological effects and suggesting a direct adipotropic role as a stress-promoting factor.
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Affiliation(s)
- Sebastian Küchler
- Department of Internal Medicine, Federal Armed Forces Hospital, Ulm, Germany
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