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Xu Y, Song J, Ren Y, Barnhart WR, Dixit U, Ji F, Chen C, He J. Negative emotional eating patterns in general Chinese adults: A replication and expansion study examining group differences in eating disorder symptomatology, psychosocial impairment, and emotion regulation difficulties. Eat Behav 2024; 54:101899. [PMID: 38936286 DOI: 10.1016/j.eatbeh.2024.101899] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Revised: 06/18/2024] [Accepted: 06/19/2024] [Indexed: 06/29/2024]
Abstract
Previous research identified four patterns of negative emotional eating in American and Chinese university students and proposed future directions (e.g., exploring potential differences in emotion regulation across patterns and replicating the patterns in a general, non-student population). Furthermore, prior research has not explored group differences in muscularity-oriented eating disorder symptomatology or psychosocial impairment. Therefore, the present study addressed these gaps in a sample of general Chinese adults, further testing group differences in typical and muscularity-oriented eating disorder symptomatology, psychosocial impairment, and emotion regulation difficulties across patterns of negative emotional eating. A total of 600 Chinese adults were recruited. Latent class analysis (LCA) was used. Results replicated the four patterns of negative emotional eating in previous research, including non-emotional eating (non-EE), emotional over- and under-eating (EOE-EUE), emotional over-eating (EOE), and emotional under-eating (EUE). Significant class differences were identified in eating disorder symptomatology, psychosocial impairment, and emotion regulation difficulties. Specifically, individuals with EOE and EOE-EUE patterns exhibited higher eating disorder symptomatology, higher psychosocial impairment, and more emotion regulation difficulties than those with non-EE and EUE patterns. Therefore, these two classes (i.e., EOE and EOE-EUE), especially the poorly researched EOE-EUE group, should be further examined to elucidate research and clinical applications. Furthermore, findings underscore the role of emotion regulation difficulties in further describing the differences across these negative emotional eating patterns, which can be considered in future interventions for reducing negative emotional eating.
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Affiliation(s)
- Yinuo Xu
- Division of Applied Psychology, School of Humanities and Social Science, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, PR China.
| | - Jianwen Song
- Department of Education Psychology, Baylor University, Waco, TX, USA.
| | - Yaoxiang Ren
- Division of Applied Psychology, School of Humanities and Social Science, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, PR China.
| | - Wesley R Barnhart
- Department of Psychology, Bowling Green State University, Bowling Green, OH, USA.
| | - Urvashi Dixit
- Department of Psychology, University of South Alabama, Mobile, AL, USA.
| | - Feng Ji
- Department of Applied Psychology and Human Development, University of Toronto, Toronto, Canada.
| | - Chun Chen
- Division of Applied Psychology, School of Humanities and Social Science, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, PR China.
| | - Jinbo He
- Division of Applied Psychology, School of Humanities and Social Science, The Chinese University of Hong Kong, Shenzhen, Guangdong 518172, PR China.
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Azzi E, Fayyad-Kazan M, Kabrita CS. Characterization of circulating leptin-receptor levels following acute sleep restriction: A pilot study on healthy adult females. Physiol Behav 2024; 279:114543. [PMID: 38565330 DOI: 10.1016/j.physbeh.2024.114543] [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: 02/07/2024] [Revised: 03/19/2024] [Accepted: 03/30/2024] [Indexed: 04/04/2024]
Abstract
BACKGROUND Insufficient sleep adversely affects energy homeostasis by decreasing leptin levels. The underlying physiological mechanisms; however, remain unclear. Circulating leptin is well described to be regulated by its soluble receptor (sOB-R). Intriguingly, the impact of short sleep duration on sOB-R levels has never been characterized. AIM In this study, we investigated, for the first time, the variation of sOB-R levels and its temporal relationship with circulating leptin upon acute sleep restriction. METHODS Five adult females were maintained on an 8-hour sleep schedule (bedtime at 00:00) for 1 week before restricting their sleep to 4.5 h (bedtime at 03:30) on 2 consecutive nights. Balanced meals were scheduled to specific hours and sleep was objectively measured. Four-hour blood samples were regularly collected during waking hours between 08:00 and 00:00. RESULTS Sleep restriction resulted in lower leptin (20.9 ± 1.7 vs 25.7 ± 1.7 ng/ml) and higher sOB-R concentrations (24.4 ± 1.2 vs 19.8 ± 1.6 ng/ml). Neither the discordant temporal relationship nor the pattern of leptin and sOB-R were altered in response to sleep restriction. CONCLUSION Our results suggest that sleep restriction may modulate circulating leptin levels and possibly metabolism via upregulating its soluble receptor. This observation may have valuable therapeutic implications when considering sOB-R as a potential target during the management of metabolic disturbances.
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Affiliation(s)
- Elissar Azzi
- Notre Dame University-Louaize (NDU), Faculty of Natural and Applied Sciences, Department of Sciences, Zouk Mosbeh, Lebanon; Institute for Molecular Medicine Finland FIMM, HiLIFE, University of Helsinki, Helsinki, Finland.
| | - Mohammad Fayyad-Kazan
- The American University of Iraq-Baghdad (AUIB), College of Arts and Sciences, Department of Natural and Applied Sciences, Baghdad, Iraq
| | - Colette S Kabrita
- Notre Dame University-Louaize (NDU), Faculty of Natural and Applied Sciences, Department of Sciences, Zouk Mosbeh, Lebanon; The American University of Iraq-Baghdad (AUIB), College of Arts and Sciences, Department of Natural and Applied Sciences, Baghdad, Iraq.
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Casini A, Vivacqua G, Vaccaro R, Renzi A, Leone S, Pannarale L, Franchitto A, Onori P, Mancinelli R, Gaudio E. Expression and role of cocaine-amphetamine regulated transcript (CART) in the proliferation of biliary epithelium. Eur J Histochem 2023; 67:3846. [PMID: 37859350 PMCID: PMC10620849 DOI: 10.4081/ejh.2023.3846] [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: 08/04/2023] [Accepted: 09/25/2023] [Indexed: 10/21/2023] Open
Abstract
Cholangiocytes, the epithelial cells that line the biliary tree, can proliferate under the stimulation of several factors through both autocrine and paracrine pathways. The cocaine-amphetamine-regulated-transcript (CART) peptide has several physiological functions, and it is widely expressed in several organs. CART increases the survival of hippocampal neurons by upregulating brain-derived neurotrophic factor (BDNF), whose expression has been correlated to the proliferation rate of cholangiocytes. In the present study, we aimed to evaluate the expression of CART and its role in modulating cholangiocyte proliferation in healthy and bile duct ligated (BDL) rats in vivo, as well as in cultured normal rat cholangiocytes (NRC) in vitro. Liver samples from both healthy and BDL (1 week) rats, were analyzed by immunohistochemistry and immunofluorescence for CART, CK19, TrkB and p75NTR BDNF receptors. PCNA staining was used to evaluate the proliferation of the cholangiocytes, whereas TUNEL assay was used to evaluate biliary apoptosis. NRC treated or not with CART were used to confirm the role of CART on cholangiocytes proliferation and the secretion of BDNF. Cholangiocytes proliferation, apoptosis, CART and TrkB expression were increased in BDL rats, compared to control rats. We found a higher expression of TrkB and p75NTR, which could be correlated with the proliferation rate of biliary tree during BDL. The in vitro study demonstrated increased BDNF secretion by NRC after treatment with CART compared with control cells. As previously reported, proliferating cholangiocytes acquire a neuroendocrine phenotype, modulated by several factors, including neurotrophins. Accordingly, CART may play a key role in the remodeling of biliary epithelium during cholestasis by modulating the secretion of BDNF.
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Affiliation(s)
- Arianna Casini
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Giorgio Vivacqua
- Integrated Research Center (PRAAB), Campus Biomedico University of Rome.
| | - Rosa Vaccaro
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Anastasia Renzi
- Department of Pathology, Akershus University Hospital, Lorenskog.
| | - Stefano Leone
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Luigi Pannarale
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Antonio Franchitto
- Department of Movement, Human and Health Sciences, University of Rome Foro Italico.
| | - Paolo Onori
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Romina Mancinelli
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
| | - Eugenio Gaudio
- Department of Anatomical, Histological, Forensic Medicine and Orthopaedics Sciences, Sapienza University of Rome.
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Baghel K, Azam Z, Srivastava R, Gupta N, Kango N. Withaferin-A attenuates diabetes mellitus induced male reproductive dysfunction mediated by ERα in brain and testes of Swiss albino mice. Sci Rep 2023; 13:17625. [PMID: 37848702 PMCID: PMC10582261 DOI: 10.1038/s41598-023-44904-y] [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: 07/14/2023] [Accepted: 10/13/2023] [Indexed: 10/19/2023] Open
Abstract
Diabetes mellitus (DM) is a chronic metabolic disease, characterized by persistent hyperglycemia resulting from diminished insulin secretion or insulin resistance. The present study evaluated the ameliorative effects of Withaferin-A (WA) on DM-induced reproductive dysfunction in mice. For the same, mice were intraperitoneally injected with Streptozotocin (STZ), (40 mg/kg/day) for 5 consecutive days to induce DM. Mice were then treated with WA (8 mg/kg/day) in normal and diabetic conditions (STZ + WA). Next, blood glucose levels, oral glucose tolerance, intraperitoneal insulin tolerance, oxidative stress and reproductive parameters were estimated. For reproductive performance, immunofluorescent localization of gonadotropin-releasing hormone (GnRH-I) and estrogen receptor alpha (ERα) in the preoptic area and paraventricular nucleus region of hypothalamus and ERα in testes was performed. STZ-induced diabetes triggered reproductive dysfunctions as mediated by low GnRH-I and ERα in the brain and ERα in the testes along with declined testosterone and estradiol levels. Treatment with WA significantly reduced the blood glucose levels and enhanced glucose clearance accompanied by reduced oxidative stress in the brain, pancreas and testes as indicated by the low levels of H2O2 and MDA in diabetic mice treated with WA (STZ + WA). This study reports, for the first time, that WA can efficiently ameliorate DM-induced reproductive dysfunctions by enhancing endogenous testosterone, estrogen and increased GnRH-I and ERα in the brain and ERα in the testes of DM-induced male mice.
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Affiliation(s)
- Kalpana Baghel
- Department of Microbiology, School of Biological Sciences, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP, 470003, India
- Department of Zoology, School of Biological Sciences, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP, 470003, India
| | - Zaffar Azam
- Department of Zoology, School of Biological Sciences, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP, 470003, India
| | - Rashmi Srivastava
- Department of Zoology, University of Allahabad, Prayagraj, UP, 211002, India
| | - Neelima Gupta
- Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP, 470003, India
| | - Naveen Kango
- Department of Microbiology, School of Biological Sciences, Dr. Harisingh Gour Vishwavidyalaya (A Central University), Sagar, MP, 470003, India.
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Talati M, Brittain E, Agrawal V, Fortune N, Simon K, Shay S, Zeng X, Freeman ML, West J, Hemnes A. A potential adverse role for leptin and cardiac leptin receptor in the right ventricle in pulmonary arterial hypertension: effect of metformin is BMPR2 mutation-specific. Front Med (Lausanne) 2023; 10:1276422. [PMID: 37869164 PMCID: PMC10586504 DOI: 10.3389/fmed.2023.1276422] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 09/15/2023] [Indexed: 10/24/2023] Open
Abstract
Introduction Pulmonary arterial hypertension is a fatal cardiopulmonary disease. Leptin, a neuroendocrine hormone released by adipose tissue, has a complex relationship with cardiovascular diseases, including PAH. Leptin is thought to be an important factor linking metabolic syndrome and cardiovascular disorders. Given the published association between metabolic syndrome and RV dysfunction in PAH, we sought to determine the association between leptin and RV dysfunction. We hypothesized that in PAH-RV, leptin influences metabolic changes via leptin receptors, which can be manipulated by metformin. Methods Plasma leptin was measured in PAH patients and healthy controls from a published trial of metformin in PAH. Leptin receptor localization was detected in RV from PAH patients, healthy controls, animal models of PH with RV dysfunction before and after metformin treatment, and cultured cardiomyocytes with two different BMPR2 mutants by performing immunohistochemical and cell fractionation studies. Functional studies were conducted in cultured cardiomyocytes to examine the role of leptin and metformin in lipid-driven mitochondrial respiration. Results In human studies, we found that plasma leptin levels were higher in PAH patients and moderately correlated with higher BMI, but not in healthy controls. Circulating leptin levels were reduced by metformin treatment, and these findings were confirmed in an animal model of RV dysfunction. Leptin receptor expression was increased in PAH-RV cardiomyocytes. In animal models of RV dysfunction and cultured cardiomyocytes with BMPR2 mutation, we found increased expression and membrane localization of the leptin receptor. In cultured cardiomyocytes with BMPR2 mutation, leptin moderately influences palmitate uptake, possibly via CD36, in a mutation-specific manner. Furthermore, in cultured cardiomyocytes, the Seahorse XFe96 Extracellular Flux Analyzer and gene expression data indicate that leptin may not directly influence lipid-driven mitochondrial respiration in BMPR2 mutant cardiomyocytes. However, metformin alone or when supplemented with leptin can improve lipid-driven mitochondrial respiration in BMPR2 mutant cardiomyocytes. The effect of metformin on lipid-driven mitochondrial respiration in cardiomyocytes is BMPR2 mutation-specific. Conclusion In PAH, increased circulating leptin can influence metabolic signaling in RV cardiomyocytes via the leptin receptor; in particular, it may alter lipid-dependent RV metabolism in combination with metformin in a mutation-specific manner and warrants further investigation.
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Affiliation(s)
- Megha Talati
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Evan Brittain
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Vineet Agrawal
- Division of Cardiovascular Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Niki Fortune
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Katie Simon
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Sheila Shay
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Xiaofang Zeng
- Department of Cardiology, Xiangya Hospital, Central South University, Changsha, China
| | - Michael L. Freeman
- Department of Radiation Oncology, Vanderbilt University Medical Center, Nashville, TN, United States
| | - James West
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
| | - Anna Hemnes
- Division of Allergy, Pulmonary and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, TN, United States
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Ha J, Shin J, Seok E, Kim S, Sun S, Yang H. Estradiol and progesterone regulate NUCB2/nesfatin-1 expression and function in GH3 pituitary cells and THESC endometrial cells. Anim Cells Syst (Seoul) 2023; 27:129-137. [PMID: 37351263 PMCID: PMC10283468 DOI: 10.1080/19768354.2023.2226735] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 05/30/2023] [Accepted: 06/05/2023] [Indexed: 06/24/2023] Open
Abstract
Estradiol (E2) and progesterone (P4) are essential sex steroid hormones that play critical roles in the pituitary gland and uterus. Recently, nesfatin-1, a polypeptide hormone that regulates appetite and energy homeostasis in the hypothalamus, was found to be expressed in the pituitary gland and uterus. In this study, we aimed to investigate the relationship between these two steroid hormones and the expression and function of nesfatin-1 in the pituitary gland and uterus using GH3 cells, a lacto-somatotroph cell line, and THESC cells, an endometrial stromal cell line. First, we verified the presence of nesfatin-1 and nesfatin-1 binding sites in GH3 and THESC cells. E2 increased the mRNA expression of NUCB2, the gene encoding the nesfatin-1 protein, in GH3 cells, while P4 had no significant effect. In THESC cells, NUCB2 mRNA expression was decreased by E2 but increased by P4. In addition, nesfatin-1 significantly increased growth hormone (GH) and prolactin (PRL) mRNA expression in GH3 cells, and E2 enhanced this effect. In THESC cells, nesfatin-1 significantly increased the mRNA expression of insulin-like growth factor binding protein 1 (IGFBP1) and PRL, which are decidualization marker genes, and P4 further enhanced this effect. These results suggest that nesfatin-1 may act as a local regulator of GH and PRL production in the pituitary gland and decidualization in the uterus, modulating its effects in response to E2 and P4.
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Affiliation(s)
- Jinah Ha
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
| | - Jungwoo Shin
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
| | - Eunji Seok
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
| | - Soohyun Kim
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
| | - Sojung Sun
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
| | - Hyunwon Yang
- Department of Biohealth Convergence, College of Natural Sciences, Seoul Women's University, Seoul, Korea
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D’Ambrosio C, Cigliano L, Mazzoli A, Matuozzo M, Nazzaro M, Scaloni A, Iossa S, Spagnuolo MS. Fructose Diet-Associated Molecular Alterations in Hypothalamus of Adolescent Rats: A Proteomic Approach. Nutrients 2023; 15:nu15020475. [PMID: 36678346 PMCID: PMC9862284 DOI: 10.3390/nu15020475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/16/2022] [Revised: 01/13/2023] [Accepted: 01/13/2023] [Indexed: 01/19/2023] Open
Abstract
BACKGROUND The enhanced consumption of fructose as added sugar represents a major health concern. Due to the complexity and multiplicity of hypothalamic functions, we aim to point out early molecular alterations triggered by a sugar-rich diet throughout adolescence, and to verify their persistence until the young adulthood phase. METHODS Thirty days old rats received a high-fructose or control diet for 3 weeks. At the end of the experimental period, treated animals were switched to the control diet for further 3 weeks, and then analyzed in comparison with those that were fed the control diet for the entire experimental period. RESULTS Quantitative proteomics identified 19 differentially represented proteins, between control and fructose-fed groups, belonging to intermediate filament cytoskeleton, neurofilament, pore complex and mitochondrial respiratory chain complexes. Western blotting analysis confirmed proteomic data, evidencing a decreased abundance of mitochondrial respiratory complexes and voltage-dependent anion channel 1, the coregulator of mitochondrial biogenesis PGC-1α, and the protein subunit of neurofilaments α-internexin in fructose-fed rats. Diet-associated hypothalamic inflammation was also detected. Finally, the amount of brain-derived neurotrophic factor and its high-affinity receptor TrkB, as well as of synaptophysin, synaptotagmin, and post-synaptic protein PSD-95 was reduced in sugar-fed rats. Notably, deregulated levels of all proteins were fully rescued after switching to the control diet. CONCLUSIONS A short-term fructose-rich diet in adolescent rats induces hypothalamic inflammation and highly affects mitochondrial and cytoskeletal compartments, as well as the level of specific markers of brain function; above-reported effects are reverted after switching animals to the control diet.
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Affiliation(s)
- Chiara D’Ambrosio
- Institute for the Animal Production System in the Mediterranean Environment, National Research Council, 80055 Portici, Italy
| | - Luisa Cigliano
- Department of Biology, University of Naples Federico II, 80121 Naples, Italy
| | - Arianna Mazzoli
- Department of Biology, University of Naples Federico II, 80121 Naples, Italy
| | - Monica Matuozzo
- Institute for the Animal Production System in the Mediterranean Environment, National Research Council, 80055 Portici, Italy
| | - Martina Nazzaro
- Department of Biology, University of Naples Federico II, 80121 Naples, Italy
| | - Andrea Scaloni
- Institute for the Animal Production System in the Mediterranean Environment, National Research Council, 80055 Portici, Italy
| | - Susanna Iossa
- Department of Biology, University of Naples Federico II, 80121 Naples, Italy
| | - Maria Stefania Spagnuolo
- Institute for the Animal Production System in the Mediterranean Environment, National Research Council, 80055 Portici, Italy
- Correspondence:
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Clusterin Plasma Concentrations Are Decreased in Sepsis and Inversely Correlated with Established Markers of Inflammation. Diagnostics (Basel) 2022; 12:diagnostics12123010. [PMID: 36553017 PMCID: PMC9776480 DOI: 10.3390/diagnostics12123010] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/26/2022] [Revised: 11/11/2022] [Accepted: 11/25/2022] [Indexed: 12/04/2022] Open
Abstract
Clusterin is a multifunctional protein that is recognized to mediate cellular stress response associated with organ failure, systemic inflammation, and metabolic alterations. The aim of this study was to determine the value of clusterin as a clinical biomarker in critical ill patients with or without sepsis. We analyzed clusterin plasma concentrations in 200 critically ill patients (133 with sepsis, 67 without sepsis) on admission to the medical intensive care unit (ICU). The results were compared with 66 healthy controls. Clusterin plasma concentration was significantly elevated in critically ill patients compared to healthy subjects. Clusterin levels were significantly higher in non-septic ICU patients than in patients with sepsis. Clusterin correlated inversely with routinely used biomarkers of inflammatory response. Furthermore, clusterin levels were higher in ICU patients with pre-existing obesity and type 2 diabetes. Clusterin was not associated with disease severity, organ failure, or mortality in the ICU. This study highlights significantly elevated clusterin levels in critically ill patients, predominantly in non-sepsis conditions, and associates circulating clusterin to inflammatory and metabolic dysfunctions.
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Ren L, Bao D, Wang L, Xu Q, Xu Y, Shi Z. Nucleobindin-2/nesfatin-1 enhances the cell proliferation, migration, invasion and epithelial-mesenchymal transition in gastric carcinoma. J Cell Mol Med 2022; 26:4986-4994. [PMID: 36065769 PMCID: PMC9549493 DOI: 10.1111/jcmm.17522] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2022] [Revised: 07/27/2022] [Accepted: 08/08/2022] [Indexed: 12/07/2022] Open
Abstract
Nesfatin-1, a newly discovered adipokine derived from nucleobindin-2 (NUCB2), has been described as a new prognostic marker in cancers. This study aimed to explore the functional role of NUCB2/nesfatin-1 in the cell proliferation, migration and invasion in gastric carcinoma (GC). The expressions of NUCB2/nesfatin-1 in GC tissues and normal adjacent tissues (NATs) were compared, and the effect of inhibition of NUCB2/nesfatin-1 on the cell proliferation, migration, invasion and epithelial-mesenchymal transition (EMT) in GC cell line SGC-7901 was investigated. Cell transfection was conducted to inhibit NUCB2/nesfatin-1 by short hairpin RNA. Cell proliferation, migration and invasion abilities were determined using cell counting kit-8 (CCK-8), 5-ethynyl-2'-deoxyuridine (EdU), wound healing and transwell assays, respectively. The expressions of EMT markers E-Cadherin and N-Cadherin were determined using western blotting. The expression of NUCB2/nesfatin-1 protein in GC tissues was significantly increased compared with that in NATs. Consistently, the serum concentrations of NUCB2/nesfatin-1 were significantly higher in patients with GC as compared with those in the control group. Moreover, the results of CCK-8 assay and EdU assay indicated that knockdown of NUCB2/nesfatin-1 could markedly decrease SGC-7901 proliferation. Furthermore, the results of wound healing assay and transwell assay demonstrated that knockdown of NUCB2/nesfatin-1 significantly suppressed SGC-7901 migration and invasion abilities. Additionally, knockdown of NUCB2/nesfatin-1 decreased the expressions of N-Cadherin and increased the expressions of E-Cadherin in SGC-7901 cells. These findings suggest that knockdown of NUCB2/nesfatin-1 suppressed the proliferation, migration, invasion and EMT of SGC-7901 cells, suggesting a potentially promising therapeutic target for GC.
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Affiliation(s)
- Le Ren
- Department of GastroenterologySecond People's Hospital of HefeiHefeiChina
| | - Deming Bao
- Department of GastroenterologySecond People's Hospital of HefeiHefeiChina
| | - Liming Wang
- Department of GastroenterologySecond People's Hospital of HefeiHefeiChina
| | - Qin Xu
- Department of GastroenterologySecond People's Hospital of HefeiHefeiChina
| | - Yayun Xu
- Inflammation and Immune Mediated Diseases Laboratory of Anhui Province, School of PharmacyAnhui Institute of Innovative Drugs, Anhui Medical UniversityHefeiChina
| | - Zhenwang Shi
- Department of GastroenterologySecond People's Hospital of HefeiHefeiChina
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10
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Kopruszinski CM, Vizin R, Watanabe M, Martinez AL, de Souza LHM, Dodick DW, Porreca F, Navratilova E. Exploring the neurobiology of the premonitory phase of migraine preclinically - a role for hypothalamic kappa opioid receptors? J Headache Pain 2022; 23:126. [PMID: 36175828 PMCID: PMC9524131 DOI: 10.1186/s10194-022-01497-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Accepted: 08/31/2022] [Indexed: 11/21/2022] Open
Abstract
Background The migraine premonitory phase is characterized in part by increased thirst, urination and yawning. Imaging studies show that the hypothalamus is activated in the premonitory phase. Stress is a well know migraine initiation factor which was demonstrated to engage dynorphin/kappa opioid receptors (KOR) signaling in several brain regions, including the hypothalamus. This study proposes the exploration of the possible link between hypothalamic KOR and migraine premonitory symptoms in rodent models. Methods Rats were treated systemically with the KOR agonist U-69,593 followed by yawning and urination monitoring. Apomorphine, a dopamine D1/2 agonist, was used as a positive control for yawning behaviors. Urination and water consumption following systemic administration of U-69,593 was also assessed. To examine if KOR activation specifically in the hypothalamus can promote premonitory symptoms, AAV8-hSyn-DIO-hM4Di (Gi-DREADD)-mCherry viral vector was microinjected into the right arcuate nucleus (ARC) of female and male KORCRE or KORWT mice. Four weeks after the injection, clozapine N-oxide (CNO) was administered systemically followed by the assessment of urination, water consumption and tactile sensory response. Results Systemic administration of U-69,593 increased urination but did not produce yawning in rats. Systemic KOR agonist also increased urination in mice as well as water consumption. Cell specific Gi-DREADD activation (i.e., inhibition through Gi-coupled signaling) of KORCRE neurons in the ARC also increased water consumption and the total volume of urine in mice but did not affect tactile sensory responses. Conclusion Our studies in rodents identified the KOR in a hypothalamic region as a mechanism that promotes behaviors consistent with clinically-observed premonitory symptoms of migraine, including increased thirst and urination but not yawning. Importantly, these behaviors occurred in the absence of pain responses, consistent with the emergence of the premonitory phase before the headache phase. Early intervention for preventive treatment even before the headache phase may be achievable by targeting the hypothalamic KOR. Supplementary Information The online version contains supplementary material available at 10.1186/s10194-022-01497-7.
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Affiliation(s)
| | - Robson Vizin
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Moe Watanabe
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ, USA
| | - Ashley L Martinez
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ, USA
| | | | | | - Frank Porreca
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ, USA.,Department of Collaborative Research, Mayo Clinic, Scottsdale, USA
| | - Edita Navratilova
- Department of Pharmacology, College of Medicine, University of Arizona, Tucson, AZ, USA. .,Department of Collaborative Research, Mayo Clinic, Scottsdale, USA.
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11
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Thirumoorthy C, Deepa M, Srikumar BN, Hannah W, Venkatesan U, Nikhil PJ, Hemavathy S, Binukumar B, Anjana RM, Ram U, Balasubramanyam M, Saravanan P, Mohan V, Gokulakrishnan K. Altered levels of neurobiological biomarkers at the interface of depression and gestational diabetes mellitus in Asian Indian women. Neuropeptides 2022; 93:102245. [PMID: 35461022 DOI: 10.1016/j.npep.2022.102245] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/08/2022] [Revised: 03/17/2022] [Accepted: 04/03/2022] [Indexed: 11/21/2022]
Abstract
AIM Gestational diabetes mellitus (GDM) might predispose the mothers to depression. Studies have reported the role of biomarkers either in GDM or depression, but very few have examined them in GDM with depression. The present study profiled the circulating levels of brain-derived neurotrophic factor (BDNF), Beta Endorphin (BE) and nesfatin-1 in women with GDM (with and without depression). METHODS 160 pregnant women at 24-28 weeks of pregnancy (NGT/GDM with & without depression, n = 40 each) were randomly selected from the ongoing STRiDE (STratification of Risk of Diabetes in Early pregnancy) study. Depression score was derived using PHQ-9 questionnaire and ELISA was used to quantify the biomarkers. RESULTS Circulatory levels of BDNF, BE and nesfatin-1 were lower in GDM women with or without depression compared to NGT without depression, however, nesfatin-1 levels were higher in NGT with depression. Notably, GDM with depression had the lowest levels of BDNF and BE. Both BDNF and BE levels were negatively correlated with depression, 1 h and 2 h plasma glucose. Regression analysis confirmed that each standard deviation decreases in BDNF and BE were independently associated with higher odds of GDM with or without depression even after adjusting for potential confounders. CONCLUSION Our study has identified altered levels of a panel of neurobiological biomarkers (BDNF/BE/nesfatin-1) in those with combined GDM and depression. BDNF/BE could be potential biomarkers to assess the higher risk of coexisting depression and GDM.
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Affiliation(s)
- C Thirumoorthy
- Department of Neurochemistry, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bengaluru, India
| | - M Deepa
- Department of Epidemiology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - B N Srikumar
- Department of Neurophysiology, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India
| | - W Hannah
- Department of Epidemiology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - U Venkatesan
- Department of Epidemiology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - P J Nikhil
- Department of Neurochemistry, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bengaluru, India
| | - S Hemavathy
- Department of Epidemiology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - B Binukumar
- Department of Biostatistics, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bangalore, India
| | - R M Anjana
- Department of Diabetology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - Uma Ram
- Seethapathy Clinic & Hospital, Chennai, India
| | - M Balasubramanyam
- Department of Cell & Molecular Biology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - P Saravanan
- Populations, Evidence and Technologies, Division of Health Sciences, Warwick Medical School, University of Warwick, UK; Department of Diabetes, Endocrinology and Metabolism, George Eliot Hospital, Nuneaton, UK
| | - V Mohan
- Department of Diabetology, Madras Diabetes Research Foundation (MDRF), Chennai, India
| | - K Gokulakrishnan
- Department of Neurochemistry, National Institute of Mental Health & Neuro Sciences (NIMHANS), Bengaluru, India.
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12
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Prolonged Activation of Brain CB2 Signaling Modulates Hypothalamic Microgliosis and Astrogliosis in High Fat Diet-Fed Mice. Int J Mol Sci 2022; 23:ijms23105527. [PMID: 35628338 PMCID: PMC9141740 DOI: 10.3390/ijms23105527] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/07/2022] [Revised: 05/02/2022] [Accepted: 05/04/2022] [Indexed: 12/19/2022] Open
Abstract
Low-grade inflammation of the hypothalamus is associated with the disturbance of energy balance. The endocannabinoid system has been implicated in the development and maintenance of obesity as well as in the control of immune responses. The type 2 cannabinoid receptor (CB2) signaling has been associated with anti-inflammatory effects. Therefore, in high fat diet (HFD)-induced obese mice, we modulated CB2 signaling and investigated its effects on energy homeostasis and hypothalamic microgliosis/astrogliosis. We observed no effect on caloric intake and body weight gain in control diet-fed animals that received prolonged icv infusion of the CB2 receptor agonist HU308. Interestingly, we observed a decrease in glucose tolerance in HFD-fed animals treated with HU308. Prolonged icv infusion of HU308 increases astrogliosis in the ventromedial nucleus (VMH) of obese animals and reduced HFD-induced microgliosis in the hypothalamic arcuate (ARC) but not in the paraventricular (PVN) or VMH nuclei. These data indicate that central CB2 signaling modulates glucose homeostasis and glial reactivity in obesogenic conditions, irrespective of changes in body weight.
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13
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He Y, Cai X, Liu H, Conde KM, Xu P, Li Y, Wang C, Yu M, He Y, Liu H, Liang C, Yang T, Yang Y, Yu K, Wang J, Zheng R, Liu F, Sun Z, Heisler L, Wu Q, Tong Q, Zhu C, Shu G, Xu Y. 5-HT recruits distinct neurocircuits to inhibit hunger-driven and non-hunger-driven feeding. Mol Psychiatry 2021; 26:7211-7224. [PMID: 34290371 PMCID: PMC8776930 DOI: 10.1038/s41380-021-01220-z] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/28/2020] [Revised: 06/14/2021] [Accepted: 06/29/2021] [Indexed: 02/07/2023]
Abstract
Obesity is primarily a consequence of consuming calories beyond energetic requirements, but underpinning drivers have not been fully defined. 5-Hydroxytryptamine (5-HT) neurons in the dorsal Raphe nucleus (5-HTDRN) regulate different types of feeding behavior, such as eating to cope with hunger or for pleasure. Here, we observed that activation of 5-HTDRN to hypothalamic arcuate nucleus (5-HTDRN → ARH) projections inhibits food intake driven by hunger via actions at ARH 5-HT2C and 5-HT1B receptors, whereas activation of 5-HTDRN to ventral tegmental area (5-HTDRN → VTA) projections inhibits non-hunger-driven feeding via actions at 5-HT2C receptors. Further, hunger-driven feeding gradually activates ARH-projecting 5-HTDRN neurons via inhibiting their responsiveness to inhibitory GABAergic inputs; non-hunger-driven feeding activates VTA-projecting 5-HTDRN neurons through reducing a potassium outward current. Thus, our results support a model whereby parallel circuits modulate feeding behavior either in response to hunger or to hunger-independent cues.
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Affiliation(s)
- Yanlin He
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Pennington Biomedical Research Center, Brain Glycemic and Metabolism Control Department, Louisiana State University, Baton Rouge, LA, USA
| | - Xing Cai
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- State Key Laboratory of Genetic Resources and Evolution, Kunming Institute of Zoology, Chinese Academy of Sciences, Kunming, Yunnan, China
| | - Hailan Liu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Krisitine M Conde
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Pingwen Xu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
- Division of Endocrinology, Department of Medicine, The University of Illinois at Chicago, Chicago, IL, USA
| | - Yongxiang Li
- Guangdong Laboratory of Lingnan Modern Agriculture and Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangdong, China
| | - Chunmei Wang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Meng Yu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Yang He
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Hesong Liu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Chen Liang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Tingting Yang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Yongjie Yang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Kaifan Yu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Julia Wang
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Rong Zheng
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Feng Liu
- Departments of Pharmacology, University of Texas Health at San Antonio, San Antonio, TX, USA
| | - Zheng Sun
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA
- Department of Medicine, Division of Diabetes, Endocrinology and Metabolism, Baylor College of Medicine, Houston, TX, USA
| | - Lora Heisler
- Rowett Institute, University of Aberdeen, Foresterhill, Aberdeen, UK
| | - Qi Wu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA
| | - Qingchun Tong
- Brown Foundation Institute of Molecular Medicine, University of Texas Health Science Center at Houston, Houston, TX, USA
| | - Canjun Zhu
- Guangdong Laboratory of Lingnan Modern Agriculture and Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangdong, China
| | - Gang Shu
- Guangdong Laboratory of Lingnan Modern Agriculture and Guangdong Province Key Laboratory of Animal Nutritional Regulation, College of Animal Science, South China Agricultural University, Guangdong, China.
| | - Yong Xu
- Children's Nutrition Research Center, Department of Pediatrics, Baylor College of Medicine, Houston, TX, USA.
- Department of Molecular and Cellular Biology, Baylor College of Medicine, Houston, TX, USA.
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14
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Polat S, Caner A. TRANSGENERATIONAL IMPACT OF TOPICAL STEROID APPLICATION ON SUPEROXIDE DISMUTASE ACTIVITIES OF HYPOTHALAMUS-PITUITARY-ADRENAL AXIS IN RATS. Can J Physiol Pharmacol 2021; 100:386-392. [PMID: 34826257 DOI: 10.1139/cjpp-2021-0493] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Topical steroids(TS) are widely prescribed since the 1950s.This study aimed to investigate the transgenerational effects of TS on the antioxidant mechanism of the hypothalamus-pituitary-adrenal(HPA) axis,both in prenatal and infancy for the first time. Three generations(F1, F2 and F3) and prenatal group(P) were investigated in both sexes with two different time points; P45th and P75th day were accepted as puberty and early adulthood,respectively.Clobetasol propionate 0.05% was used as TS.qRT-PCR was performed to expressional analyses of Sod1, Sod2, and Sod3 genes in the HPA tissues. The Sods mRNA expression of the HPA belonging to P and F1 groups revealed similar results in both genders. The downregulation in the adrenal Sod level was determined in P and F1, F2, and F3 generations in both gender, especially in females(p<0.05).Sods activities in the pituitary of all groups were downregulated in female rats(p<0.05).Interestingly,in male rats,Sod2 and Sod3 weren't expressed in the pituitary compare to control on the day P45 while Sod2 and Sod3 expressions were determined in all the groups on the day P75.Sod1 overexpression found in pituitary and hypothalamus of male in F3 generation. This study showed that TS applied in infancy had a transgenerational adverse effect on antioxidant defense mechanisms especially in the adrenal.
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Affiliation(s)
- Seher Polat
- Erzincan University, 162315, Medical Genetics, Basbaglar Mah, Erzincan, Turkey, 24100;
| | - Armağan Caner
- Erciyes Universitesi Tip Fakultesi, 64212, Biophysics, Kayseri, Kayseri, Turkey;
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15
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Su H, Liu N, Zhang Y, Kong J. Vitamin D/VDR regulates peripheral energy homeostasis via central renin-angiotensin system. J Adv Res 2021; 33:69-80. [PMID: 34603779 PMCID: PMC8463910 DOI: 10.1016/j.jare.2021.01.011] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2020] [Revised: 01/19/2021] [Accepted: 01/20/2021] [Indexed: 01/19/2023] Open
Abstract
Introduction Some epidemiological studies have revealed that vitamin D (VD) deficiency is closely linked with the prevalence of obesity, however, the role of VD in energy homeostasis is yet to be investigated, especially in central nervous system. Given that VD negatively regulates renin in adipose tissue, we hypothesized that central VD might play a potential role in energy homeostasis. Objectives The present study aims to investigate the potential role of VD in energy homeostasis in the CNS and elaborate its underlying mechanisms. Methods This study was conducted in Cyp27b1−/− mice, VD-treated and wild-type mice. After the intraventricular injection of renin or its inhibitors, the changes of renin-angiotensin system (RAS) and its down-stream pathway as well as their effects on metabolic rate were examined. Results The RAS activity was enhanced in Cyp27b1−/− mice, exhibiting a increased metabolic rate. Additionally, corticotropin-releasing hormone (CRH), a RAS-mediated protein regulating energy metabolism in the hypothalamus, increased significantly in Cyp27b1−/− mice. While in VD-treated group, the RAS and sympathetic nerve activities were slightly inhibited, hence the reduced metabolic rate. Conclusion Collectively, the present study demonstrates that the VD/vitamin D receptor (VDR) has a significant impact on energy homeostasis through the modulation of RAS activity in the hypothalamus, subsequently altering CRH expression and sympathetic nervous activity.
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Affiliation(s)
- Han Su
- Department of Clinical Nutrition, Shengjing Hospital of China Medical University, Shenyang, China
| | - Ning Liu
- Department of Clinical Nutrition, Shengjing Hospital of China Medical University, Shenyang, China
| | - Yalin Zhang
- Department of Clinical Nutrition, Shengjing Hospital of China Medical University, Shenyang, China
| | - Juan Kong
- Department of Clinical Nutrition, Shengjing Hospital of China Medical University, Shenyang, China
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16
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Nogueiras R. MECHANISMS IN ENDOCRINOLOGY: The gut-brain axis: regulating energy balance independent of food intake. Eur J Endocrinol 2021; 185:R75-R91. [PMID: 34260412 PMCID: PMC8345901 DOI: 10.1530/eje-21-0277] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/18/2021] [Accepted: 07/14/2021] [Indexed: 12/15/2022]
Abstract
Obesity is a global pandemic with a large health and economic burden worldwide. Bodyweight is regulated by the ability of the CNS, and especially the hypothalamus, to orchestrate the function of peripheral organs that play a key role in metabolism. Gut hormones play a fundamental role in the regulation of energy balance, as they modulate not only feeding behavior but also energy expenditure and nutrient partitioning. This review examines the recent discoveries about hormones produced in the stomach and gut, which have been reported to regulate food intake and energy expenditure in preclinical models. Some of these hormones act on the hypothalamus to modulate thermogenesis and adiposity in a food intake-independent fashion. Finally, the association of these gut hormones to eating, energy expenditure, and weight loss after bariatric surgery in humans is discussed.
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Affiliation(s)
- Ruben Nogueiras
- Department of Physiology, CIMUS, USC, CIBER Fisiopatología Obesidad y Nutrición (CiberOBN), Instituto Salud Carlos III, Galician Agency of Innovation, Xunta de Galicia, Santiago de Compostela, Spain
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17
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Cano G, Hernan SL, Sved AF. Centrally Projecting Edinger-Westphal Nucleus in the Control of Sympathetic Outflow and Energy Homeostasis. Brain Sci 2021; 11:1005. [PMID: 34439626 PMCID: PMC8392615 DOI: 10.3390/brainsci11081005] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 07/13/2021] [Accepted: 07/20/2021] [Indexed: 11/16/2022] Open
Abstract
The centrally projecting Edinger-Westphal nucleus (EWcp) is a midbrain neuronal group, adjacent but segregated from the preganglionic Edinger-Westphal nucleus that projects to the ciliary ganglion. The EWcp plays a crucial role in stress responses and in maintaining energy homeostasis under conditions that require an adjustment of energy expenditure, by virtue of modulating heart rate and blood pressure, thermogenesis, food intake, and fat and glucose metabolism. This modulation is ultimately mediated by changes in the sympathetic outflow to several effector organs, including the adrenal gland, heart, kidneys, brown and white adipose tissues and pancreas, in response to environmental conditions and the animal's energy state, providing for appropriate energy utilization. Classic neuroanatomical studies have shown that the EWcp receives inputs from forebrain regions involved in these functions and projects to presympathetic neuronal populations in the brainstem. Transneuronal tracing with pseudorabies virus has demonstrated that the EWcp is connected polysynaptically with central circuits that provide sympathetic innervation to all these effector organs that are critical for stress responses and energy homeostasis. We propose that EWcp integrates multimodal signals (stress, thermal, metabolic, endocrine, etc.) and modulates the sympathetic output simultaneously to multiple effector organs to maintain energy homeostasis under different conditions that require adjustments of energy demands.
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Affiliation(s)
- Georgina Cano
- Department of Neuroscience, A210 Langley Hall, University of Pittsburgh, Pittsburgh, PA 15260, USA; (S.L.H.); (A.F.S.)
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18
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Delli V, Silva MSB, Prévot V, Chachlaki K. The KiNG of reproduction: Kisspeptin/ nNOS interactions shaping hypothalamic GnRH release. Mol Cell Endocrinol 2021; 532:111302. [PMID: 33964320 DOI: 10.1016/j.mce.2021.111302] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2020] [Revised: 04/20/2021] [Accepted: 04/23/2021] [Indexed: 12/21/2022]
Abstract
Gonadotropin-releasing hormone (GnRH) is the master regulator of the hypothalamic-pituitary-gonadal (HPG) axis, and therefore of fertility and reproduction. The release pattern of GnRH by the hypothalamus includes both pulses and surges. However, despite a considerable body of evidence in support of a determinant role for kisspeptin, the mechanisms regulating a GnRH pulse and surge remain a topic of debate. In this review we challenge the view of kisspeptin as an absolute "monarch", and instead present the idea of a Kisspeptin-nNOS-GnRH or "KiNG" network that is responsible for generating the "GnRH pulse" and "GnRH surge". In particular, the neuromodulator nitric oxide (NO) has opposite effects to kisspeptin on GnRH secretion in many respects, acting as the Yin to kisspeptin's Yang and creating a dynamic system in which kisspeptin provides the "ON" signal, promoting GnRH release, while NO mediates the "OFF" signal, acting as a tonic brake on GnRH secretion. This interplay between an activator and an inhibitor, which is in turn fine-tuned by the gonadal steroid environment, thus leads to the generation of GnRH pulses and surges and is crucial for the proper development and function of the reproductive axis.
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Affiliation(s)
- Virginia Delli
- Univ. Lille, Inserm, CHU Lille, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille Neuroscience & Cognition, UMR-S 1172, F-59000, Lille, France; FHU, 1000 Days for Health, F-59000, Lille, France
| | - Mauro S B Silva
- Univ. Lille, Inserm, CHU Lille, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille Neuroscience & Cognition, UMR-S 1172, F-59000, Lille, France; FHU, 1000 Days for Health, F-59000, Lille, France
| | - Vincent Prévot
- Univ. Lille, Inserm, CHU Lille, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille Neuroscience & Cognition, UMR-S 1172, F-59000, Lille, France; FHU, 1000 Days for Health, F-59000, Lille, France
| | - Konstantina Chachlaki
- Univ. Lille, Inserm, CHU Lille, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille Neuroscience & Cognition, UMR-S 1172, F-59000, Lille, France; FHU, 1000 Days for Health, F-59000, Lille, France; University Research Institute of Child Health and Precision Medicine, National and Kapodistrian University of Athens, "Aghia Sophia" Children's Hospital, Athens, Greece.
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19
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Harris RBS. Phosphorylation of STAT3 in hypothalamic nuclei is stimulated by lower doses of leptin than are needed to inhibit food intake. Am J Physiol Endocrinol Metab 2021; 321:E190-E201. [PMID: 34121448 PMCID: PMC8321824 DOI: 10.1152/ajpendo.00143.2021] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/13/2021] [Revised: 06/03/2021] [Accepted: 06/07/2021] [Indexed: 01/08/2023]
Abstract
This experiment investigated which hypothalamic nuclei were activated by a dose of leptin that inhibited food intake. Foodnot intake, energy expenditure, respiratory exchange ratio (RER), and intrascapular brown adipose tissue (IBAT) temperature were measured in male and female Sprague Dawley rats for 36 h following an intraperitoneal injection of 0, 50, 200, 500, or 1,000 µg leptin/kg with each rat tested with each dose of leptin in random order. In both males and females, RER and 12-h food intake were inhibited only by 1,000 µg leptin/kg, but there was no effect on energy expenditure or IBAT temperature. At the end of the experiment, phosphorylated signal transducer and activator of transcription 3 (pSTAT3) immunoreactivity was measured 1 h after injection of 0, 50, 500, or 1,000 µg leptin/kg. In male rats, the lowest dose of leptin produced a maximal activation of STAT3 in the Arc and nucleus of the solitary tract (NTS). There was no response in the dorsomedial hypothalamus, but there was a progressive increase in ventromedial nucleus of the hypothalamus (VMH) pSTAT3 with increasing doses of leptin. In female rats, there was no significant change in Arc and pSTAT3 NTS activation was maximal with 500 mg leptin/kg, but only the highest dose of leptin increased VMH pSTAT3. These results suggest that the VMH plays an important role in the energetic response to elevations of circulating leptin but do not exclude the possibility that multiple nuclei provide the appropriate integrated response to hyperleptinemia.NEW & NOTEWORTHY The results of this experiment show that doses of leptin too small to inhibit food intake produce a maximal response to leptin in the arcuate nucleus. By contrast the VMH shows a robust response that correlates with inhibition of food intake. This suggests that the VMH plays an important role in the energetic response to hyperleptinemia.
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Affiliation(s)
- Ruth B S Harris
- Department of Physiology, Medical College of Georgia at Augusta University, Augusta, Georgia
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20
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Liu H, Du T, Li C, Yang G. STAT3 phosphorylation in central leptin resistance. Nutr Metab (Lond) 2021; 18:39. [PMID: 33849593 PMCID: PMC8045279 DOI: 10.1186/s12986-021-00569-w] [Citation(s) in RCA: 39] [Impact Index Per Article: 13.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Accepted: 04/03/2021] [Indexed: 12/20/2022] Open
Abstract
Mechanism exploitation of energy homeostasis is urgently required because of the worldwide prevailing of obesity-related metabolic disorders in human being. Although it is well known that leptin plays a central role in regulating energy balance by suppressing food intake and promoting energy expenditure, the existence of leptin resistance in majority of obese individuals hampers the utilization of leptin therapy against these disorders. However, the mechanism of leptin resistance is largely unknown in spite of the globally enormous endeavors. Current theories to interpret leptin resistance include the impairment of leptin transport, attenuation of leptin signaling, chronic inflammation, ER tress, deficiency of autophagy, as well as leptin itself. Leptin-activated leptin receptor (LepRb) signals in hypothalamus via several pathways, in which JAK2-STAT3 pathway, the most extensively investigated one, is considered to mediate the major action of leptin in energy regulation. Upon leptin stimulation the phosphorylation of STAT3 is one of the key events in JAK2-STAT3 pathway, followed by the dimerization and nuclear translocation of this molecule. Phosphorylated STAT3 (p-STAT3), as a transcription factor, binds to and regulates its target gene such as POMC gene, playing the physiological function of leptin. Regarding POMC gene in hypothalamus however little is known about the detail of its interaction with STAT3. Moreover the status of p-STAT3 and its significance in hypothalamus of DIO mice needs to be well elucidated. This review comprehends literatures on leptin and leptin resistance and especially discusses what STAT3 phosphorylation would contribute to central leptin resistance.
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Affiliation(s)
- Huimin Liu
- College of Life Science, Henan Agricultural University, 95 Wen Hua Road, Zhengzhou, 450002, China
| | - Tianxin Du
- College of Life Science, Henan Agricultural University, 95 Wen Hua Road, Zhengzhou, 450002, China
| | - Chen Li
- College of Life Science, Henan Agricultural University, 95 Wen Hua Road, Zhengzhou, 450002, China
| | - Guoqing Yang
- College of Life Science, Henan Agricultural University, 95 Wen Hua Road, Zhengzhou, 450002, China.
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21
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Boucsein A, Kamstra K, Tups A. Central signalling cross-talk between insulin and leptin in glucose and energy homeostasis. J Neuroendocrinol 2021; 33:e12944. [PMID: 33615588 DOI: 10.1111/jne.12944] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/29/2020] [Revised: 01/10/2021] [Accepted: 01/27/2021] [Indexed: 12/28/2022]
Abstract
Energy homeostasis is controlled by an intricate regulatory system centred in the brain. The peripheral adiposity signals insulin and leptin play a crucial role in this system by informing the brain of the energy status of the body and mediating their catabolic effects through signal transduction in hypothalamic areas that control food intake, energy expenditure and glucose metabolism. Disruptions of insulin and leptin signalling can result in diabetes and obesity. The central signalling cross-talk between insulin and leptin is essential for maintenance of normal healthy energy homeostasis. An important role of leptin in glucoregulation has been revealed. Typically regarded as being controlled by insulin, the control of glucose homeostasis critically depends on functional leptin action. Leptin, on the other hand, is able to lower glucose levels in the absence of insulin, although insulin is necessary for long-term stabilisation of euglycaemia. Evidence from rodent models and human patients suggests that leptin improves insulin sensitivity in type 1 diabetes. The signalling cross-talk between insulin and leptin is likely conveyed by the WNT/β-catenin pathway. Leptin activates WNT/β-catenin signalling, leading to inhibition of glycogen synthase kinase-3β, a key inhibitor of insulin action, thereby facilitating improved insulin signal transduction and sensitisation of insulin action. Interestingly, insights into the roles of insulin and leptin in insects and fish indicate that leptin may have initially evolved as a glucoregulatory hormone and that its anorexigenic and body weight regulatory function was acquired throughout evolution. Furthermore, the regulation of both central and peripheral control of energy homeostasis is tightly controlled by the circadian clock, allowing adaptation of homeostatic processes to environmental cues.
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Affiliation(s)
- Alisa Boucsein
- Centre for Neuroendocrinology, Department of Physiology, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Kaj Kamstra
- Centre for Neuroendocrinology, Department of Physiology, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
| | - Alexander Tups
- Centre for Neuroendocrinology, Department of Physiology, School of Biomedical Sciences, University of Otago, Dunedin, New Zealand
- Maurice Wilkins Centre for Molecular Biodiscovery, University of Auckland, Auckland, New Zealand
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Stoyanova I, Lutz D. Ghrelin-Mediated Regeneration and Plasticity After Nervous System Injury. Front Cell Dev Biol 2021; 9:595914. [PMID: 33869167 PMCID: PMC8046019 DOI: 10.3389/fcell.2021.595914] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2020] [Accepted: 02/24/2021] [Indexed: 12/17/2022] Open
Abstract
The nervous system is highly vulnerable to different factors which may cause injury followed by an acute or chronic neurodegeneration. Injury involves a loss of extracellular matrix integrity, neuronal circuitry disintegration, and impairment of synaptic activity and plasticity. Application of pleiotropic molecules initiating extracellular matrix reorganization and stimulating neuronal plasticity could prevent propagation of the degeneration into the tissue surrounding the injury. To find an omnipotent therapeutic molecule, however, seems to be a fairly ambitious task, given the complex demands of the regenerating nervous system that need to be fulfilled. Among the vast number of candidates examined so far, the neuropeptide and hormone ghrelin holds within a very promising therapeutic potential with its ability to cross the blood-brain barrier, to balance metabolic processes, and to stimulate neurorepair and neuroactivity. Compared with its well-established systemic effects in treatment of metabolism-related disorders, the therapeutic potential of ghrelin on neuroregeneration upon injury has received lesser appreciation though. Here, we discuss emerging concepts of ghrelin as an omnipotent player unleashing developmentally related molecular cues and morphogenic cascades, which could attenuate and/or counteract acute and chronic neurodegeneration.
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Affiliation(s)
- Irina Stoyanova
- Department of Anatomy and Cell Biology, Medical University Varna, Varna, Bulgaria
| | - David Lutz
- Department of Neuroanatomy and Molecular Brain Research, Ruhr University Bochum, Bochum, Germany
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Voigtmann F, Wolf P, Landgraf K, Stein R, Kratzsch J, Schmitz S, Abou Jamra R, Blüher M, Meiler J, Beck-Sickinger AG, Kiess W, Körner A. Identification of a novel leptin receptor (LEPR) variant and proof of functional relevance directing treatment decisions in patients with morbid obesity. Metabolism 2021; 116:154438. [PMID: 33221380 DOI: 10.1016/j.metabol.2020.154438] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/13/2020] [Revised: 11/13/2020] [Accepted: 11/17/2020] [Indexed: 12/26/2022]
Abstract
BACKGROUND Deficiency in the leptin-leptin receptor (LEPR) axis leads to severe, and potentially treatable, obesity in humans. To guide clinical decision-making, the functional relevance of variants in the LEPR gene needs to be carefully investigated. CASES AND METHODS We characterized the functional impact of LEPR variants identified in two patients with severe early-onset obesity (1: compound heterozygous for the novel variant p.Tyr411del and p.Trp664Arg; 2: heterozygous for p.Arg612His) by investigating leptin-mediated signaling, leptin binding, receptor expression on cell surfaces, and receptor dimerization and activation for either wild-type and/or mutant LEPR. RESULTS Leptin-induced STAT3-phosphorylation was blunted the novel p.Tyr411del or the p.Trp664Arg variant and mildly reduced with the p.Arg612His variant. Computational structure prediction suggested impaired leptin binding for all three LEPR variants. Experimentally, reduced leptin binding of all mutant proteins was due to diminished LEPR expression on the cell surface, with the p.Trp664Arg mutations being the most affected. Considering the heterozygosity in our patients, we assessed the heterodimerization capacity with the wild-type LEPR, which was retained for the p.Tyr411del and p.Arg612His variants. Finally, mimicking (compound) heterozygosity, we confirmed abolished STAT3-phosphorylation for the variant combination [p.Tyr411del + p.Trp664Arg] as found in patient 1, whereas it was retained for [p.Arg612His + wilde type] as found in patient 2. CONCLUSIONS The novel p.Tyr411del mutation causes complete loss of function alone (and combined with p.Trp664Arg) and is likely the cause for the early onset obesity, qualifying the patient for pharmacologic treatment. Heterozygosity for the p.Arg612His variant, however, appears unlikely to be solely responsible for the phenotype.
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Affiliation(s)
- Franziska Voigtmann
- Center of Pediatric Research Leipzig, University Hospital for Children & Adolescents, Medical Faculty, University of Leipzig, Germany
| | - Philipp Wolf
- Institute of Biochemistry, Faculty of Life Sciences, Pharmacy and Psychology, University of Leipzig, Germany
| | - Kathrin Landgraf
- Center of Pediatric Research Leipzig, University Hospital for Children & Adolescents, Medical Faculty, University of Leipzig, Germany
| | - Robert Stein
- Center of Pediatric Research Leipzig, University Hospital for Children & Adolescents, Medical Faculty, University of Leipzig, Germany; Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, Germany
| | - Jürgen Kratzsch
- Institute of Laboratory Medicine, Clinical Chemistry and Molecular Diagnosis, University Medical Center Leipzig, Medical Faculty, University of Leipzig, Germany
| | - Samuel Schmitz
- Department of Chemistry and Center for Structural Biology, Vanderbilt University, TN, USA
| | - Rami Abou Jamra
- Institute of Human Genetics, University Medical Center Leipzig, Medical Faculty, University of Leipzig, Germany
| | - Matthias Blüher
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG) of the Helmholtz Zentrum München at the University of Leipzig and University Hospital Leipzig, Germany; Medical Department III - Endocrinology, Nephrology, Rheumatology, University of Leipzig, Germany
| | - Jens Meiler
- Department of Chemistry and Center for Structural Biology, Vanderbilt University, TN, USA; Institute of Drug Discovery, Medical Faculty, University of Leipzig, Germany
| | - Annette G Beck-Sickinger
- Institute of Biochemistry, Faculty of Life Sciences, Pharmacy and Psychology, University of Leipzig, Germany
| | - Wieland Kiess
- Center of Pediatric Research Leipzig, University Hospital for Children & Adolescents, Medical Faculty, University of Leipzig, Germany
| | - Antje Körner
- Center of Pediatric Research Leipzig, University Hospital for Children & Adolescents, Medical Faculty, University of Leipzig, Germany.
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Van Drunen R, Eckel-Mahan K. Circadian Rhythms of the Hypothalamus: From Function to Physiology. Clocks Sleep 2021; 3:189-226. [PMID: 33668705 PMCID: PMC7931002 DOI: 10.3390/clockssleep3010012] [Citation(s) in RCA: 33] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 02/11/2021] [Accepted: 02/18/2021] [Indexed: 12/13/2022] Open
Abstract
The nearly ubiquitous expression of endogenous 24 h oscillations known as circadian rhythms regulate the timing of physiological functions in the body. These intrinsic rhythms are sensitive to external cues, known as zeitgebers, which entrain the internal biological processes to the daily environmental changes in light, temperature, and food availability. Light directly entrains the master clock, the suprachiasmatic nucleus (SCN) which lies in the hypothalamus of the brain and is responsible for synchronizing internal rhythms. However, recent evidence underscores the importance of other hypothalamic nuclei in regulating several essential rhythmic biological functions. These extra-SCN hypothalamic nuclei also express circadian rhythms, suggesting distinct regions that oscillate either semi-autonomously or independent of SCN innervation. Concurrently, the extra-SCN hypothalamic nuclei are also sensitized to fluctuations in nutrient and hormonal signals. Thus, food intake acts as another powerful entrainer for the hypothalamic oscillators' mediation of energy homeostasis. Ablation studies and genetic mouse models with perturbed extra-SCN hypothalamic nuclei function reveal their critical downstream involvement in an array of functions including metabolism, thermogenesis, food consumption, thirst, mood and sleep. Large epidemiological studies of individuals whose internal circadian cycle is chronically disrupted reveal that disruption of our internal clock is associated with an increased risk of obesity and several neurological diseases and disorders. In this review, we discuss the profound role of the extra-SCN hypothalamic nuclei in rhythmically regulating and coordinating body wide functions.
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Affiliation(s)
- Rachel Van Drunen
- MD Anderson UTHealth School Graduate School of Biomedical Sciences, Houston TX 77030, USA;
- Brown Foundation Institute of Molecular Medicine University of Texas McGovern Medical School, Houston, TX 77030, USA
| | - Kristin Eckel-Mahan
- MD Anderson UTHealth School Graduate School of Biomedical Sciences, Houston TX 77030, USA;
- Brown Foundation Institute of Molecular Medicine University of Texas McGovern Medical School, Houston, TX 77030, USA
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25
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Huang W, Zhu L, Cao G, Xie P, Song Y, Huang J, Chen X, Cai Z. Integrated Proteomics and Metabolomics Assessment Indicated Metabolic Alterations in Hypothalamus of Mice Exposed to Triclosan. Chem Res Toxicol 2021; 34:1319-1328. [PMID: 33611912 DOI: 10.1021/acs.chemrestox.0c00514] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Triclosan (TCS) is a ubiquitous antimicrobial used in many daily consumer products. It has been reported to induce endocrine disrupting effects at low doses in mammals, disturbing sex hormone function and thyroid function. The hypothalamus plays a crucial role in the maintenance of neuroendocrine function and energy homeostasis. We speculated that the adverse effects of TCS might be related to the disturbance of metabolic processes in hypothalamus. The present study aimed at investigating the effects of TCS exposure on the protein and metabolite profiles in hypothalamus of mice. Male C57BL/6 mice were orally exposed to TCS at the dosage of 10 mg/kg/d for 13 weeks. The hypothalamus was isolated and processed for mass spectrometry (MS)-based proteomics and metabolomics analyses. The results showed that a 10.6% decrease (P = 0.066) in body weight gain was observed in the TCS exposure group compared with vehicle control group. Differential analysis defined 52 proteins and 57 metabolites that delineated TCS exposed mice from vehicle controls. Among the differential features, multiple proteins and metabolites were found to play vital roles in neuronal signaling and function. Bioinformatics analysis revealed that these differentially expressed proteins and metabolites were involved in four major biological processes, including glucose metabolism, purine metabolism, neurotransmitter release, and neural plasticity, suggesting the disturbance of homeostasis in energy metabolism, mitochondria function, neurotransmitter system, and neuronal function. Our results may provide insights into the neurotoxicity of TCS and extend our understanding of the biological effects induced by TCS exposure.
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Affiliation(s)
- Wei Huang
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China.,School of Environment, Jinan University, Guangzhou 510632, China
| | - Lin Zhu
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China
| | - Guodong Cao
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China
| | - Peisi Xie
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China
| | - Yuanyuan Song
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China
| | - Jialing Huang
- School of Environment, Jinan University, Guangzhou 510632, China
| | - Xiangfeng Chen
- Shandong Analysis and Test Center, Qilu University of Technology, Jinan, Shandong, China
| | - Zongwei Cai
- State Key Laboratory of Environmental and Biological Analysis, Hong Kong Baptist University, Hong Kong SAR, China
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Kang MC, Seo JA, Lee H, Uner A, Yang WM, Cruz Rodrigues KCD, Kim HJ, Li W, Campbell JN, Dagon Y, Kim YB. LRP1 regulates food intake and energy balance in GABAergic neurons independently of leptin action. Am J Physiol Endocrinol Metab 2021; 320:E379-E389. [PMID: 33356995 PMCID: PMC8260358 DOI: 10.1152/ajpendo.00399.2020] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/05/2020] [Revised: 12/11/2020] [Accepted: 12/15/2020] [Indexed: 12/14/2022]
Abstract
Low-density lipoprotein receptor-related protein 1 (LRP1) is a member of LDL receptor family that plays a key role in systemic glucose and lipid homeostasis. LRP1 also regulates energy balance in the hypothalamus by mediating leptin's anorexigenic action, although the underlying neurocircuitry involved is still unclear. Because GABAergic neurons are a major mediator of hypothalamic leptin action, we studied the role of GABAergic LRP1 in energy balance and leptin action using mice lacking LRP1 in Vgat- or AgRP-expressing neurons (Vgat-Cre; LRP1loxP/loxP or AgRP-Cre; LRP1loxP/loxP). Here, we show that LRP1 deficiency in GABAergic neurons results in severe obesity in male and female mice fed a normal-chow diet. This effect is most likely due to increased food intake and decreased energy expenditure and locomotor activity. Increased adiposity in GABAergic neuron-specific LRP1-deficient mice is accompanied by hyperleptinemia and hyperinsulinemia. Insulin resistance and glucose intolerance in these mice are occurred without change in body weight. Importantly, LRP1 in GABAergic neurons is not required for leptin action, as evidenced by normal leptin's anorexigenic action and leptin-induced hypothalamic Stat3 phosphorylation. In contrast, LRP1 deficiency in AgRP neurons has no effect on adiposity and caloric intake. In conclusion, our data identify GABAergic neurons as a key neurocircuitry that underpins LRP1-dependent regulation of systemic energy balance and body-weight homeostasis. We further find that the GABAergic LRP1 signaling pathway modulates food intake and energy expenditure independently of leptin signaling and AgRP neurons.
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Affiliation(s)
- Min-Cheol Kang
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
- Research Group of Food Processing, Korea Food Research Institute, Jeollabuk-do, South Korea
| | - Ji A Seo
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
- Department of Internal Medicine, Division of Endocrinology, Korea University College of Medicine, Seoul, South Korea
| | - Hyon Lee
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
- Department of Neurology, Gachon University Gil Medical Center, Incheon, South Korea
| | - Aykut Uner
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Won-Mo Yang
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Kellen Cristina da Cruz Rodrigues
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Hyun Jeong Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Wendy Li
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - John N Campbell
- Department of Biology, University of Virginia, Charlottesville, Virginia
| | - Yossi Dagon
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
| | - Young-Bum Kim
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center, Harvard Medical School, Boston, Massachusetts
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Kloster A, Hyer MM, Dyer S, Salome-Sanchez C, Neigh GN. High Fructose Diet Induces Sex-specific Modifications in Synaptic Respiration and Affective-like Behaviors in Rats. Neuroscience 2021; 454:40-50. [PMID: 31881260 PMCID: PMC7311226 DOI: 10.1016/j.neuroscience.2019.11.039] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/30/2019] [Revised: 11/16/2019] [Accepted: 11/25/2019] [Indexed: 12/20/2022]
Abstract
The consequences of excessive fructose intake extend beyond those of metabolic disorder to changes in emotional regulation and cognitive function. Long-term consumption of fructose, particularly common when begun in adolescence, is more likely to lead to deleterious consequences than acute consumption. These long-term consequences manifest differently in males and females, suggesting a sex-divergent mechanism by which fructose can impair physiology and neural function. The purpose of the current project was to investigate a possible sex-specific mechanism by which elevated fructose consumption drives behavioral deficits and accompanying metabolic symptoms - specifically, synaptic mitochondrial function. Male and female rats were fed a high fructose diet beginning at weaning and maintained into adulthood. Measures of physiological health across the diet consumption period indicated that females were more likely to gain weight than males while both displayed increased circulating blood glucose. As adults, females fed the high fructose diet displayed increased floating behavior in the forced swim task while males exhibited increased exploratory behavior in the open field. Synaptic respiration was altered by diet in both females and males but the effect was sex-divergent - fructose-fed females had increased synaptic respiration while males showed a decrease. When exposed to an acute energetic challenge, the pattern was reversed. Taken together, these data indicate that diet-induced alterations to neural function and physiology are sex-specific and highlight the need to consider sex as a biological variable when treating metabolic disease. Furthermore, these data suggest that synaptic mitochondrial function may contribute directly to the behavioral consequences of elevated fructose consumption.
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Affiliation(s)
- Alix Kloster
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA 23298, United States
| | - Molly M Hyer
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA 23298, United States
| | - Samya Dyer
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA 23298, United States
| | - Charlie Salome-Sanchez
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA 23298, United States
| | - Gretchen N Neigh
- Department of Anatomy and Neurobiology, Virginia Commonwealth University, Richmond, VA 23298, United States.
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28
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Abstract
Energy balance is centrally regulated by the brain through several interacting neuronal systems involving external, peripheral, and central factors within the brain. The hypothalamus integrates these factors and is the key brain area in the regulation of energy balance. In this review, we will explain the structure of the hypothalamus and its role in the regulation of energy balance. An important part of energy balance regulation is the sensing of nutrient status and availability. This review will focus on the sensing of the two main sources of energy by the hypothalamus: glucose and fat. As many common health problems and chronic diseases can be traced back to a disrupted hypothalamic function, we will also discuss hypothalamic sensing of glucose and fats in these pathologies. Finally, we will summarize the current knowledge and discuss how this may be applied clinically and for future research perspectives.
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29
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Chachlaki K, Prevot V. Nitric oxide signalling in the brain and its control of bodily functions. Br J Pharmacol 2020; 177:5437-5458. [PMID: 31347144 PMCID: PMC7707094 DOI: 10.1111/bph.14800] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Revised: 07/10/2019] [Accepted: 07/19/2019] [Indexed: 02/06/2023] Open
Abstract
Nitric oxide (NO) is a versatile molecule that plays key roles in the development and survival of mammalian species by endowing brain neuronal networks with the ability to make continual adjustments to function in response to moment-to-moment changes in physiological input. Here, we summarize the progress in the field and argue that NO-synthetizing neurons and NO signalling in the brain provide a core hub for integrating sensory- and homeostatic-related cues, control key bodily functions, and provide a potential target for new therapeutic opportunities against several neuroendocrine and behavioural abnormalities.
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Affiliation(s)
- Konstantina Chachlaki
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine BrainJean‐Pierre Aubert Research Centre, UMR‐S 1172LilleFrance
- School of MedicineUniversity of LilleLilleFrance
- CHU LilleFHU 1,000 days for HealthLilleFrance
| | - Vincent Prevot
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine BrainJean‐Pierre Aubert Research Centre, UMR‐S 1172LilleFrance
- School of MedicineUniversity of LilleLilleFrance
- CHU LilleFHU 1,000 days for HealthLilleFrance
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30
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Leptin, Leptin Receptor, KHDRBS1 (KH RNA Binding Domain Containing, Signal Transduction Associated 1), and Adiponectin in Bone Metastasis from Breast Carcinoma: An Immunohistochemical Study. Biomedicines 2020; 8:biomedicines8110510. [PMID: 33213024 PMCID: PMC7698510 DOI: 10.3390/biomedicines8110510] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2020] [Revised: 11/09/2020] [Accepted: 11/12/2020] [Indexed: 02/07/2023] Open
Abstract
Breast cancer patients are at a high risk of complications from bone metastasis. Molecular characterization of bone metastases is essential for the discovery of new therapeutic targets. Here, we investigated the expression and the intracellular distribution of KH RNA binding domain containing, signal transduction associated 1 (KHDRBS1), leptin, leptin receptor (LEPR), and adiponectin in bone metastasis from breast carcinoma and looked for correlations between the data. The expression of these proteins is known in breast carcinoma, but it has not been investigated in bone metastatic tissue to date. Immunohistochemical analysis was carried out on bone metastasis specimens, then semiquantitative evaluation of the results and the Pearson test were performed to determine eventual correlations. KHDRBS1 expression was significantly higher in the nuclei than in the cytosol of metastatic cells; LEPR was prevalently observed in the cytosol and the nuclei; leptin and adiponectin were found in metastatic cells and stromal cells; the strongest positive correlation was between nuclear KHDRBS1 and nuclear LEPR expression. Taken together, our findings support the importance of the leptin/LEPR/KHDRBS1 axis and of adiponectin in the progression of bone metastasis and suggest their potential application in pharmacological interventions.
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31
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Raut PK, Park PH. Globular adiponectin antagonizes leptin-induced growth of cancer cells by modulating inflammasomes activation: Critical role of HO-1 signaling. Biochem Pharmacol 2020; 180:114186. [DOI: 10.1016/j.bcp.2020.114186] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2020] [Revised: 07/28/2020] [Accepted: 07/29/2020] [Indexed: 12/16/2022]
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Kislal S, Shook LL, Edlow AG. Perinatal exposure to maternal obesity: Lasting cardiometabolic impact on offspring. Prenat Diagn 2020; 40:1109-1125. [PMID: 32643194 DOI: 10.1002/pd.5784] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 06/25/2020] [Accepted: 07/05/2020] [Indexed: 12/11/2022]
Abstract
Evidence from epidemiological, clinical, and animal model studies clearly demonstrates that prenatal and lactational maternal obesity and high-fat diet consumption are associated with cardiometabolic morbidity in offspring. Fetal and offspring sex may be an important effect modifier. Adverse offspring cardiometabolic outcomes observed in the setting of maternal obesity include an increased risk for obesity, features of metabolic syndrome (hypertension, hyperglycemia and insulin resistance, hyperlipidemia, increased adiposity), and non-alcoholic fatty liver disease. This review article synthesizes human and animal data linking maternal obesity and high-fat diet consumption in pregnancy and lactation to adverse cardiometabolic outcomes in offspring. We review key mechanisms underlying skeletal muscle, adipose tissue, pancreatic, liver, and central brain reward programming in obesity-exposed offspring, and how such malprogramming contributes to offspring cardiometabolic morbidity.
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Affiliation(s)
- Sezen Kislal
- Vincent Center for Reproductive Biology, Massachusetts General Hospital Research Institute, Massachusetts General Hospital, Boston, Massachusetts, USA
| | - Lydia L Shook
- Division of Maternal-Fetal Medicine, Department of Ob/Gyn, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
| | - Andrea G Edlow
- Vincent Center for Reproductive Biology, Massachusetts General Hospital Research Institute, Massachusetts General Hospital, Boston, Massachusetts, USA.,Division of Maternal-Fetal Medicine, Department of Ob/Gyn, Massachusetts General Hospital, Harvard Medical School, Boston, Massachusetts, USA
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33
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Jensen-Cody SO, Flippo KH, Claflin KE, Yavuz Y, Sapouckey SA, Walters GC, Usachev YM, Atasoy D, Gillum MP, Potthoff MJ. FGF21 Signals to Glutamatergic Neurons in the Ventromedial Hypothalamus to Suppress Carbohydrate Intake. Cell Metab 2020; 32:273-286.e6. [PMID: 32640184 PMCID: PMC7734879 DOI: 10.1016/j.cmet.2020.06.008] [Citation(s) in RCA: 74] [Impact Index Per Article: 18.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/11/2019] [Revised: 04/02/2020] [Accepted: 06/10/2020] [Indexed: 12/20/2022]
Abstract
Fibroblast growth factor 21 (FGF21) is an endocrine hormone produced by the liver that regulates nutrient and metabolic homeostasis. FGF21 production is increased in response to macronutrient imbalance and signals to the brain to suppress sugar intake and sweet-taste preference. However, the central targets mediating these effects have been unclear. Here, we identify FGF21 target cells in the hypothalamus and reveal that FGF21 signaling to glutamatergic neurons is both necessary and sufficient to mediate FGF21-induced sugar suppression and sweet-taste preference. Moreover, we show that FGF21 acts directly in the ventromedial hypothalamus (VMH) to specifically regulate sucrose intake, but not non-nutritive sweet-taste preference, body weight, or energy expenditure. Finally, our data demonstrate that FGF21 affects neuronal activity by increasing activation and excitability of neurons in the VMH. Thus, FGF21 signaling to glutamatergic neurons in the VMH is an important component of the neurocircuitry that functions to regulate sucrose intake.
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Affiliation(s)
- Sharon O Jensen-Cody
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Kyle H Flippo
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Kristin E Claflin
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Yavuz Yavuz
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Sarah A Sapouckey
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Grant C Walters
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Yuriy M Usachev
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Deniz Atasoy
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA
| | - Matthew P Gillum
- Section for Nutrient and Metabolite Sensing, the Novo Nordisk Foundation Center for Basic Metabolic Research, University of Copenhagen, 2200 Copenhagen, Denmark.
| | - Matthew J Potthoff
- Department of Neuroscience and Pharmacology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Fraternal Order of Eagles Diabetes Research Center, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Iowa Neuroscience Institute, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA; Department of Veterans Affairs Medical Center, Iowa City, IA 52242, USA.
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Prezotto LD, Thorson JF, Prevot V, Redmer DA, Grazul-Bilska AT. Nutritionally induced tanycytic plasticity in the hypothalamus of adult ewes. Domest Anim Endocrinol 2020; 72:106438. [PMID: 32388344 DOI: 10.1016/j.domaniend.2020.106438] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2019] [Revised: 12/27/2019] [Accepted: 01/16/2020] [Indexed: 02/07/2023]
Abstract
The blood-brain barrier regulates the transport of molecules that convey global energetic status to the feeding circuitry within the hypothalamus. Capillaries within the median eminence (ME) and tight junctions between tanycytes lining the third ventricle (3V) are critical components of this barrier. Herein, we tested the hypothesis that altering the plane of nutrition results in the structural reorganization of tanycytes, tight junctions, and capillary structure within the medial basal hypothalamus. Proopiomelanocortin (POMC) neuronal content within the arcuate nucleus of the hypothalamus (ARC) was also assessed to test whether reduced nutritional status improved access of nutrients to the ARC, while decreasing the access of nutrients of overfed animals. Multiparous, nongestating ewes were stratified by weight and randomly assigned to dietary treatments offered for 75 d: 200% of dietary recommendations (overfed), 100% of dietary recommendations (control), or 60% of dietary recommendations (underfed). The number of POMC-expressing neurons within the ARC was increased (P ≤ 0.002) in underfed ewes. Overfeeding increased (P ≤ 0.01) tanycyte cellular process penetration and density compared with control and underfeeding as assessed using vimentin immunostaining. Immunostaining of tight junctions along the wall of the 3V did not differ (P = 0.32) between treatments. No differences were observed in capillary density (P = 0.21) or classification (P ≥ 0.47) within the ME. These results implicate that changes within the satiety center and morphology of tanycytes within the ARC occur as an adaptation to nutrient availability.
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Affiliation(s)
- L D Prezotto
- Nutritional & Reproductive Physiology Laboratory, Northern Agricultural Research Center, Montana State University, 3710 Assinniboine Road, Havre, MT 59501, USA.
| | - J F Thorson
- Nutritional & Reproductive Physiology Laboratory, Northern Agricultural Research Center, Montana State University, 3710 Assinniboine Road, Havre, MT 59501, USA
| | - V Prevot
- INSERM, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Jean-Pierre Aubert Research Centre, U1172, Lille, France
| | - D A Redmer
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA
| | - A T Grazul-Bilska
- Department of Animal Sciences, North Dakota State University, Fargo, ND 58108, USA
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35
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Idrizaj E, Garella R, Squecco R, Baccari MC. Can adiponectin have an additional effect on the regulation of food intake by inducing gastric motor changes? World J Gastroenterol 2020; 26:2472-2478. [PMID: 32523305 PMCID: PMC7265147 DOI: 10.3748/wjg.v26.i20.2472] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/23/2019] [Revised: 04/13/2020] [Accepted: 05/12/2020] [Indexed: 02/06/2023] Open
Abstract
The regulation of food intake is a complex mechanism, and the hypothalamus is the main central structure implicated. In particular, the arcuate nucleus appears to be the most critical area in the integration of multiple peripheral signals. Among these signals, those originating from the white adipose tissue and the gastrointestinal tract are known to be involved in the regulation of food intake. The present paper focuses on adiponectin, an adipokine secreted by white adipose tissue, which is reported to have a role in the control of feeding by acting centrally. The recent observation that adiponectin is also able to influence gastric motility raises the question of whether this action represents an additional peripheral mechanism that concurs with the central effects of the hormone on food intake. This possibility, which represents an emerging aspect correlating the central and peripheral effects of adiponectin in the hunger-satiety cycle, is discussed in the present paper.
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Affiliation(s)
- Eglantina Idrizaj
- Department of Experimental and Clinical Medicine, Section of Physiological Sciences, University of Florence, Florence 50134, Italy
| | - Rachele Garella
- Department of Experimental and Clinical Medicine, Section of Physiological Sciences, University of Florence, Florence 50134, Italy
| | - Roberta Squecco
- Department of Experimental and Clinical Medicine, Section of Physiological Sciences, University of Florence, Florence 50134, Italy
| | - Maria Caterina Baccari
- Department of Experimental and Clinical Medicine, Section of Physiological Sciences, University of Florence, Florence 50134, Italy
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36
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Harris RBS. Loss of leptin receptor-expressing cells in the hindbrain decreases forebrain leptin sensitivity. Am J Physiol Endocrinol Metab 2020; 318:E806-E816. [PMID: 32228323 PMCID: PMC7272723 DOI: 10.1152/ajpendo.00020.2020] [Citation(s) in RCA: 6] [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: 01/23/2020] [Revised: 03/18/2020] [Accepted: 03/24/2020] [Indexed: 01/12/2023]
Abstract
Previous studies indicate that inhibition of food intake by leptin is mediated by an integrated response to activation of hypothalamic and hindbrain receptors. This study tested whether loss of hindbrain leptin receptor signaling changed sensitivity to forebrain leptin. Injections of leptin-conjugated saporin (Lep-Sap) into the medial nucleus of the solitary tract (NTS) were used to destroy hindbrain leptin receptor-expressing neurons of male Sprague-Dawley rats. Controls were injected with saporin conjugated with a nonsense peptide (Blk-Sap). Lep-Sap had no effect on daily food intake or body weight, but expression of phosphorylated signal transducer and activator of transcription 3 (pSTAT3) in the NTS following a peripheral injection of leptin was abolished 26 days after Lep-Sap injections. To test forebrain leptin sensitivity, Lep-Sap and Blk-Sap rats received third-ventricle injections of 0, 0.05, 0.1, 0.25, or 0.5 μg leptin. Food intake was inhibited by 0.25 and 0.5 μg leptin in Blk-Sap rats, but there was no significant effect of leptin on food intake of Lep-Sap rats. There was no difference in hypothalamic pSTAT3 in unstimulated conditions, but pSTAT3 was lower in the dorsomedial region of the ventromedial nucleus of the hypothalamus (VMH) of Lep-Sap rats compared with Blk-Sap rats following a third-ventricle injection of 0.25 μg leptin. These results are consistent with previous data showing that loss of VMH leptin receptor-expressing cells prevents weight loss caused by fourth-ventricle leptin infusion and show that the integrated response between the hindbrain and forebrain is heavily dependent on leptin activity in the VMH.
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Affiliation(s)
- Ruth B S Harris
- Department of Physiology, Medical College of Georgia, Augusta University, Augusta, Georgia
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37
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Seo JA, Kang MC, Yang WM, Hwang WM, Kim SS, Hong SH, Heo JI, Vijyakumar A, Pereira de Moura L, Uner A, Huang H, Lee SH, Lima IS, Park KS, Kim MS, Dagon Y, Willnow TE, Aroda V, Ciaraldi TP, Henry RR, Kim YB. Apolipoprotein J is a hepatokine regulating muscle glucose metabolism and insulin sensitivity. Nat Commun 2020; 11:2024. [PMID: 32332780 PMCID: PMC7181874 DOI: 10.1038/s41467-020-15963-w] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/21/2018] [Accepted: 04/02/2020] [Indexed: 12/24/2022] Open
Abstract
Crosstalk between liver and skeletal muscle is vital for glucose homeostasis. Hepatokines, liver-derived proteins that play an important role in regulating muscle metabolism, are important to this communication. Here we identify apolipoprotein J (ApoJ) as a novel hepatokine targeting muscle glucose metabolism and insulin sensitivity through a low-density lipoprotein receptor-related protein-2 (LRP2)-dependent mechanism, coupled with the insulin receptor (IR) signaling cascade. In muscle, LRP2 is necessary for insulin-dependent IR internalization, an initial trigger for insulin signaling, that is crucial in regulating downstream signaling and glucose uptake. Of physiologic significance, deletion of hepatic ApoJ or muscle LRP2 causes insulin resistance and glucose intolerance. In patients with polycystic ovary syndrome and insulin resistance, pioglitazone-induced improvement of insulin action is associated with an increase in muscle ApoJ and LRP2 expression. Thus, the ApoJ-LRP2 axis is a novel endocrine circuit that is central to the maintenance of normal glucose homeostasis and insulin sensitivity. Hepatokines are proteins secreted by the liver that can regulate whole body metabolism. Here the authors identify apolipoprotein J as a hepatokine that regulates muscle glucose metabolism and insulin resistance through a low-density lipoprotein receptor-related protein−2 mediated mechanism in mice.
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Affiliation(s)
- Ji A Seo
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Min-Cheol Kang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Research Group of Food Processing, Korea Food Research Institute, Wanju-gun, Jeollabuk-do, Korea
| | - Won-Mo Yang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Won Min Hwang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Division of Nephrology, Department of Internal Medicine, College of Medicine, Konyang University, Daejeon, Korea
| | - Sang Soo Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Department of Internal Medicine and Biomedical Research Institute, Pusan National University Hospital, Busan, Korea
| | - Soo Hyun Hong
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Columbia University, New York, NY, USA
| | - Jee-In Heo
- Division of Endocrinology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - Achana Vijyakumar
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Leandro Pereira de Moura
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,School of Applied Science, University of Campinas, Limeira, Brazil
| | - Aykut Uner
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Hu Huang
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,East Carolina University, East Carolina Diabetes and Obesity Institute, Greenville, NC, USA
| | - Seung Hwan Lee
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,College of Medicine, The Catholic University of Korea, Seoul, Korea
| | - Inês S Lima
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.,Universidade Nova de Lisboa, Lisboa, Portugal
| | - Kyong Soo Park
- Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Science and Technology, Seoul National University, Seoul, Korea
| | - Min Seon Kim
- Department of Internal Medicine, Asan Medical Center, University of Ulsan, College of Medicine, Seoul, Korea
| | - Yossi Dagon
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA
| | - Thomas E Willnow
- Molecular Cardiovascular Research, Max-Delbrueck-Center for Molecular Medicine, Berlin, Germany
| | - Vanita Aroda
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA.,Brigham and Women's Hospital and Harvard Medical School, Boston, MA, USA
| | - Theodore P Ciaraldi
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Robert R Henry
- Veterans Affairs San Diego Healthcare System (9111 G), San Diego, CA, 92161, USA.,Department of Medicine, University of California San Diego, La Jolla, CA, 92093, USA
| | - Young-Bum Kim
- Division of Endocrinology, Diabetes, and Metabolism, Beth Israel Deaconess Medical Center and Harvard Medical School, Boston, MA, USA.
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38
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Leidmaa E, Gazea M, Patchev AV, Pissioti A, Christian Gassen N, Kimura M, Liposits Z, Kallo I, Almeida OFX. Blunted leptin sensitivity during hedonic overeating can be reinstated by activating galanin 2 receptors (Gal2R) in the lateral hypothalamus. Acta Physiol (Oxf) 2020; 228:e13345. [PMID: 31310704 DOI: 10.1111/apha.13345] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2019] [Revised: 07/08/2019] [Accepted: 07/11/2019] [Indexed: 12/13/2022]
Abstract
AIM Since foods with high hedonic value are often consumed in excess of energetic needs, this study was designed to identify the mechanisms that may counter anorexigenic signalling in the presence of hedonic foods in lean animals. METHODS Mice, in different states of satiety (fed/fasted, or fed/fasted and treated with ghrelin or leptin, respectively), were allowed to choose between high-fat/high-sucrose and standard foods. Intake of each food type and the activity of hypothalamic neuropetidergic neurons that regulate appetite were monitored. In some cases, food choice was monitored in leptin-injected fasted mice that received microinjections of galanin receptor agonists into the lateral hypothalamus. RESULTS Appetite-stimulating orexin neurons in the lateral hypothalamus are rapidly activated when lean, satiated mice consume a highly palatable food (PF); such activation (upregulated c-Fos expression) occurred even after administration of the anorexigenic hormone leptin and despite intact leptin signalling in the hypothalamus. The ability of leptin to restrain PF eating is restored when a galanin receptor 2 (Gal2R) agonist is injected into the lateral hypothalamus. CONCLUSION Hedonically-loaded foods interrupt the inhibitory actions of leptin on orexin neurons and interfere with the homeostatic control of feeding. Overeating of palatable foods can be curtailed in lean animals by activating Gal2R in the lateral hypothalamus.
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Affiliation(s)
- Este Leidmaa
- Max Planck Institute of Psychiatry Munich Germany
- Graduate School of Systems Neuroscience Munich University Planegg‐Martinsried Germany
- Institute of Molecular Psychiatry Bonn Germany
| | - Mary Gazea
- Max Planck Institute of Psychiatry Munich Germany
| | | | | | | | | | - Zsolt Liposits
- Institute of Experimental Medicine Hungarian Academy of Sciences Budapest Hungary
| | - Imre Kallo
- Institute of Experimental Medicine Hungarian Academy of Sciences Budapest Hungary
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39
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Salazar J, Chávez-Castillo M, Rojas J, Ortega A, Nava M, Pérez J, Rojas M, Espinoza C, Chacin M, Herazo Y, Angarita L, Rojas DM, D'Marco L, Bermudez V. Is "Leptin Resistance" Another Key Resistance to Manage Type 2 Diabetes? Curr Diabetes Rev 2020; 16:733-749. [PMID: 31886750 DOI: 10.2174/1573399816666191230111838] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/08/2019] [Accepted: 12/12/2019] [Indexed: 02/06/2023]
Abstract
Although novel pharmacological options for the treatment of type 2 diabetes mellitus (DM2) have been observed to modulate the functionality of several key organs in glucose homeostasis, successful regulation of insulin resistance (IR), body weight management, and pharmacological treatment of obesity remain notable problems in endocrinology. Leptin may be a pivotal player in this scenario, as an adipokine which centrally regulates appetite and energy balance. In obesity, excessive caloric intake promotes a low-grade inflammatory response, which leads to dysregulations in lipid storage and adipokine secretion. In turn, these entail alterations in leptin sensitivity, leptin transport across the blood-brain barrier and defects in post-receptor signaling. Furthermore, hypothalamic inflammation and endoplasmic reticulum stress may increase the expression of molecules which may disrupt leptin signaling. Abundant evidence has linked obesity and leptin resistance, which may precede or occur simultaneously to IR and DM2. Thus, leptin sensitivity may be a potential early therapeutic target that demands further preclinical and clinical research. Modulators of insulin sensitivity have been tested in animal models and small clinical trials with promising results, especially in combination with agents such as amylin and GLP-1 analogs, in particular, due to their central activity in the hypothalamus.
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Affiliation(s)
- Juan Salazar
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | - Mervin Chávez-Castillo
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | - Joselyn Rojas
- Division of Pulmonary and Critical Care Medicine, Brigham and Women's Hospital, Harvard Medical School, Boston, MA, United States
| | - Angel Ortega
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | - Manuel Nava
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | - José Pérez
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | - Milagros Rojas
- Endocrine and Metabolic Diseases Research Center, School of Medicine, The University of Zulia, Maracaibo, Venezuela
| | | | - Maricarmen Chacin
- Universidad Simon Bolivar, Facultad de Ciencias de la Salud, Barranquilla, Colombia
| | - Yaneth Herazo
- Universidad Simon Bolivar, Facultad de Ciencias de la Salud, Barranquilla, Colombia
| | - Lissé Angarita
- Escuela de Nutricion y Dietetica, Facultad de Medicina, Universidad Andres Bello, Sede Concepcion, Chile
| | - Diana Marcela Rojas
- Escuela de Nutricion y Dietética, Facultad de Medicina, Universidad Andres Bello, Santiago, Chile
| | - Luis D'Marco
- Hospital Clinico de Valencia, INCLIVA, Servicio de Nefrologia, Valencia, Spain
| | - Valmore Bermudez
- Universidad Simon Bolivar, Facultad de Ciencias de la Salud, Barranquilla, Colombia
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40
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Phillips CL, Grayson BE. The immune remodel: Weight loss-mediated inflammatory changes to obesity. Exp Biol Med (Maywood) 2020; 245:109-121. [PMID: 31955604 PMCID: PMC7016415 DOI: 10.1177/1535370219900185] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022] Open
Abstract
Obesity is an escalating world problem that contributes to the complexity and cost of treatment of metabolic disorders. Obesity is the result of increased storage of energy in the form of adipose tissue, reducing the quality of daily life, and interfering with longevity. Obesity is also a chronic, low-grade inflammatory disorder. The inflammatory processes affect many organ systems with expanded numbers of immune cells and increased cytokine production. Long-term weight loss is difficult to achieve and maintain. Lifestyle modifications, pharmacologic treatments, and surgical methods are increasingly utilized to ameliorate excess body weight and the comorbidities of obesity, such as diabetes, cardiovascular disease, dyslipidemia, and cancers. Weight loss is also touted to reduce inflammation. Here we review the current literature on human obesity-related systemic and local changes to the immune system and circulating inflammatory mediators. Further, we consider the impact of weight loss to reduce the burden of inflammation, bearing in mind the different methods of weight loss—behavioral change vs. surgical intervention.
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Affiliation(s)
- Charles L Phillips
- Program in Pathology, University of Mississippi Medical Center, Jackson, MS 39216, USA
| | - Bernadette E Grayson
- Department of Neurobiology and Anatomical Sciences, University of Mississippi Medical Center, Jackson, MS 39216, USA
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41
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Florent V, Baroncini M, Jissendi-Tchofo P, Lopes R, Vanhoutte M, Rasika S, Pruvo JP, Vignau J, Verdun S, Johansen JE, Pigeyre M, Bouret SG, Nilsson IAK, Prevot V. Hypothalamic Structural and Functional Imbalances in Anorexia Nervosa. Neuroendocrinology 2020; 110:552-562. [PMID: 31484186 DOI: 10.1159/000503147] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2019] [Accepted: 09/02/2019] [Indexed: 11/19/2022]
Abstract
The hypothalamus contains integrative systems that support life, including physiological processes such as food intake, energy expenditure, and reproduction. Here, we show that anorexia nervosa (AN) patients, contrary to normal weight and constitutionally lean individuals, respond with a paradoxical reduction in hypothalamic levels of glutamate/glutamine (Glx) upon feeding. This reversal of the Glx response is associated with decreased wiring in the arcuate nucleus and increased connectivity in the lateral hypothalamic area, which are involved in the regulation on a variety of physiological and behavioral functions including the control of food intake and energy balance. The identification of distinct hypothalamic neurochemical dysfunctions and associated structural variations in AN paves the way for the development of new diagnostic and treatment strategies in conditions associated with abnormal body mass index and a maladaptive response to negative energy balance.
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Affiliation(s)
- Vincent Florent
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille, France
- School of Medicine, Université Lille, Lille, France
- Nutrition, Arras General Hospital, Lille, France
| | - Marc Baroncini
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille, France
- School of Medicine, Université Lille, Lille, France
- Neurosurgery, CHU Lille, Lille, France
- The Saban Research Institute, Developmental Neuroscience Program and Diabetes and Obesity Program, Center for Endocrinology, Diabetes and Metabolism, Children's Hospital Los Angeles, University of Southern California, Los Angeles, California, USA
| | | | | | | | | | - Jean-Pierre Pruvo
- School of Medicine, Université Lille, Lille, France
- Neuroradiology, CHU Lille, Lille, France
| | | | | | - Jeanette E Johansen
- Department of Molecular Medicine and Surgery and Center for Molecular Medicine, Karolinska Institutet/Hospital, Stockholm, Sweden
| | - Marie Pigeyre
- School of Medicine, Université Lille, Lille, France
- Nutrition, CHU Lille, Lille, France
- U1190, European Genomic Institute for Diabetes, Lille, France
| | - Sebastien G Bouret
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille, France
- School of Medicine, Université Lille, Lille, France
- The Saban Research Institute, Developmental Neuroscience Program and Diabetes and Obesity Program, Center for Endocrinology, Diabetes and Metabolism, Children's Hospital Los Angeles, University of Southern California, Los Angeles, California, USA
| | - Ida A K Nilsson
- Department of Molecular Medicine and Surgery and Center for Molecular Medicine, Karolinska Institutet/Hospital, Stockholm, Sweden
| | - Vincent Prevot
- Inserm, Laboratory of Development and Plasticity of the Neuroendocrine Brain, Lille, France,
- School of Medicine, Université Lille, Lille, France,
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42
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Majorczyk M, Staszkiewicz M, Szklarczyk J, Major P, Pisarska M, Wysocki M, Stefura T, Kacprzyk A, Droś J, Hołda MK, Pędziwiatr M, Budzyński A, Jaworek J. The influence of bariatric surgery on serum levels of irisin and nesfatin-1. Acta Chir Belg 2019; 119:363-369. [PMID: 30388390 DOI: 10.1080/00015458.2018.1534393] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
Introduction: Bariatric surgery is associated with multiple endocrine and metabolic changes. Irisin and nesfatin-1 have recently been described as regulatory peptides involved in obesity-related insulin resistance. Our aim was to analyze the changes of those two molecules observed in patients after bariatric procedures. Materials and methods: This prospective study involved 40 patients treated for morbid obesity. Irisin and nesfatin-1 were measured before, 6 months and 1 year after surgical intervention. We also gathered demographic data, information concerning comorbidities, factors related to the surgery and outcomes of bariatric treatment. Results: Twenty-seven patients completed the study (15 females). The mean age of the group was 43.5 ± 10.4 years. Six (22.2%) patients were submitted to Laparoscopic Sleeve Gastrectomy and 21 (77.8%) patients were submitted to Laparoscopic Roux-en-Y Gastric Bypass. The participants in our study achieved significant weight loss. The irisin level remained stable in the whole study group during all three measurements included in our study protocol (p = .71). Our study group presented a reduction of the nesfatin-1 level 6 months after bariatric surgery and a slight further decrease after one-year observation, although these changes were also not significant (p = .17). Conclusions: We did not find any significant correlation between changes of irisin or nesfatin-1 level and bariatric surgery, as an aid in the regulation of glucose metabolism.
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Affiliation(s)
- Marta Majorczyk
- Department of Medical Physiology, Jagiellonian University Medical College, Cracow, Poland
| | - Magdalena Staszkiewicz
- Department of Medical Physiology, Jagiellonian University Medical College, Cracow, Poland
- Department Clinical Nursing, Faculty of Health Sciences, Institute of Nursing and Midwifery, Jagiellonian University Medical College, Cracow, Poland
| | - Joanna Szklarczyk
- Department of Medical Physiology, Jagiellonian University Medical College, Cracow, Poland
| | - Piotr Major
- 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
- Centre for Research, Training and Innovation in Surgery (CERTAIN Surgery), Cracow, Poland
| | - Magdalena Pisarska
- 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
- Centre for Research, Training and Innovation in Surgery (CERTAIN Surgery), Cracow, Poland
| | - Michał Wysocki
- 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
- Centre for Research, Training and Innovation in Surgery (CERTAIN Surgery), Cracow, Poland
| | - Tomasz Stefura
- Students' Scientific Group at 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
| | - Artur Kacprzyk
- Students' Scientific Group at 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
| | - Jakub Droś
- Students' Scientific Group at 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
| | - Mateusz K. Hołda
- Department of Anatomy, Jagiellonian University Medical College, Cracow, Poland
| | - Michał Pędziwiatr
- 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
- Centre for Research, Training and Innovation in Surgery (CERTAIN Surgery), Cracow, Poland
| | - Andrzej Budzyński
- 2nd Department of General Surgery, Jagiellonian University Medical College, Cracow, Poland
- Centre for Research, Training and Innovation in Surgery (CERTAIN Surgery), Cracow, Poland
| | - Jolanta Jaworek
- Department of Medical Physiology, Jagiellonian University Medical College, Cracow, Poland
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43
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Role of Paraventricular Nucleus in Regulation of Feeding Behaviour and the Design of Intranuclear Neuronal Pathway Communications. Int J Pept Res Ther 2019. [DOI: 10.1007/s10989-019-09928-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
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44
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Rodríguez-Rodríguez A, Lazcano I, Sánchez-Jaramillo E, Uribe RM, Jaimes-Hoy L, Joseph-Bravo P, Charli JL. Tanycytes and the Control of Thyrotropin-Releasing Hormone Flux Into Portal Capillaries. Front Endocrinol (Lausanne) 2019; 10:401. [PMID: 31293518 PMCID: PMC6603095 DOI: 10.3389/fendo.2019.00401] [Citation(s) in RCA: 30] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Accepted: 06/06/2019] [Indexed: 12/17/2022] Open
Abstract
Central and peripheral mechanisms that modulate energy intake, partition and expenditure determine energy homeostasis. Thyroid hormones (TH) regulate energy expenditure through the control of basal metabolic rate and thermogenesis; they also modulate food intake. TH concentrations are regulated by the hypothalamus-pituitary-thyroid (HPT) axis, and by transport and metabolism in blood and target tissues. In mammals, hypophysiotropic thyrotropin-releasing hormone (TRH) neurons of the paraventricular nucleus of the hypothalamus integrate energy-related information. They project to the external zone of the median eminence (ME), a brain circumventricular organ rich in neuron terminal varicosities and buttons, tanycytes, other glial cells and capillaries. These capillary vessels form a portal system that links the base of the hypothalamus with the anterior pituitary. Tanycytes of the medio-basal hypothalamus express a repertoire of proteins involved in transport, sensing, and metabolism of TH; among them is type 2 deiodinase, a source of 3,3',5-triiodo-L-thyronine necessary for negative feedback on TRH neurons. Tanycytes subtypes are distinguished by position and phenotype. The end-feet of β2-tanycytes intermingle with TRH varicosities and terminals in the external layer of the ME and terminate close to the ME capillaries. Besides type 2 deiodinase, β2-tanycytes express the TRH-degrading ectoenzyme (TRH-DE); this enzyme likely controls the amount of TRH entering portal vessels. TRH-DE is rapidly upregulated by TH, contributing to TH negative feedback on HPT axis. Alterations in energy balance also regulate the expression and activity of TRH-DE in the ME, making β2-tanycytes a hub for energy-related regulation of HPT axis activity. β2-tanycytes also express TRH-R1, which mediates positive effects of TRH on TRH-DE activity and the size of β2-tanycyte end-feet contacts with the basal lamina adjacent to ME capillaries. These end-feet associations with ME capillaries, and TRH-DE activity, appear to coordinately control HPT axis activity. Thus, down-stream of neuronal control of TRH release by action potentials arrival in the external layer of the median eminence, imbricated intercellular processes may coordinate the flux of TRH into the portal capillaries. In conclusion, β2-tanycytes appear as a critical cellular element for the somatic and post-secretory control of TRH flux into portal vessels, and HPT axis regulation in mammals.
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Affiliation(s)
- Adair Rodríguez-Rodríguez
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Iván Lazcano
- Departamento de Neurobiología Celular y Molecular, Instituto de Neurobiología, Universidad Nacional Autónoma de México, Juriquilla, Mexico
| | - Edith Sánchez-Jaramillo
- Laboratorio de Neuroendocrinología Molecular, Dirección de Investigaciones en Neurociencias, Instituto Nacional de Psiquiatría Ramón de la Fuente Muñiz, Mexico City, Mexico
| | - Rosa María Uribe
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Lorraine Jaimes-Hoy
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Patricia Joseph-Bravo
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
| | - Jean-Louis Charli
- Departamento de Genética del Desarrollo y Fisiología Molecular, Instituto de Biotecnología, Universidad Nacional Autónoma de México, Cuernavaca, Mexico
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Andreoli MF, Donato J, Cakir I, Perello M. Leptin resensitisation: a reversion of leptin-resistant states. J Endocrinol 2019; 241:R81-R96. [PMID: 30959481 DOI: 10.1530/joe-18-0606] [Citation(s) in RCA: 42] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/10/2019] [Accepted: 04/02/2019] [Indexed: 12/30/2022]
Abstract
Leptin resistance refers to states in which leptin fails to promote its anticipated effects, frequently coexisting with hyperleptinaemia. Leptin resistance is closely associated with obesity and also observed in physiological situations such as pregnancy and in seasonal animals. Leptin resensitisation refers to the reversion of leptin-resistant states and is associated with improvement in endocrine and metabolic disturbances commonly observed in obesity and a sustained decrease of plasma leptin levels, possibly below a critical threshold level. In obesity, leptin resensitisation can be achieved with treatments that reduce body adiposity and leptinaemia, or with some pharmacological compounds, while physiological leptin resistance reverts spontaneously. The restoration of leptin sensitivity could be a useful strategy to treat obesity, maintain weight loss and/or reduce the recidivism rate for weight regain after dieting. This review provides an update and discussion about reversion of leptin-resistant states and modulation of the molecular mechanisms involved in each situation.
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Affiliation(s)
- María F Andreoli
- Laboratory of Experimental Neurodevelopment, Institute of Development and Paediatric Research (IDIP), La Plata Children's Hospital and Scientific Research Commission, Province of Buenos Aires (CIC-PBA), La Plata, Buenos Aires, Argentina
- Argentine Research Council (CONICET), La Plata, Buenos Aires, Argentina
| | - Jose Donato
- Department of Physiology and Biophysics, Institute of Biomedical Sciences, University of São Paulo, São Paulo, São Paulo, Brazil
| | - Isin Cakir
- Life Sciences Institute, University of Michigan, Ann Arbor, Michigan, USA
- Department of Molecular Physiology and Biophysics, Vanderbilt University, Nashville, Tennessee, USA
| | - Mario Perello
- Laboratory of Neurophysiology, Multidisciplinary Institute of Cell Biology (IMBICE, Argentine Research Council (CONICET), National University of La Plata and Scientific Research Commission, Province of Buenos Aires (CIC-PBA)), La Plata, Buenos Aires, Argentina
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Newmyer BA, Whindleton CM, Klein PM, Beenhakker MP, Jones MK, Scott MM. VIPergic neurons of the infralimbic and prelimbic cortices control palatable food intake through separate cognitive pathways. JCI Insight 2019; 5:126283. [PMID: 30939126 PMCID: PMC6538359 DOI: 10.1172/jci.insight.126283] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2018] [Accepted: 03/27/2019] [Indexed: 11/17/2022] Open
Abstract
The prefrontal cortex controls food reward seeking and ingestion, playing important roles in directing attention, regulating motivation towards reward pursuit, and the assignment of reward salience and value. The cell types that mediate these behavioral functions, however, are not well described. We report here that optogenetic activation of vasoactive peptide expressing (VIP) interneurons in both the infralimbic (IL) and prelimbic (PL) divisions of the medial prefrontal cortex in mice is sufficient to reduce acute, binge-like intake of high calorie palatable food in the absence of any effect on low calorie rodent chow intake in the sated animal. In addition, we discovered that the behavioral mechanisms associated with these changes in feeding differed between animals that underwent either IL or PL VIPergic stimulation. While IL VIP neurons showed the ability to reduce palatable food intake, this effect was dependent upon the novelty and relative value of the food source. In addition, IL VIP neuron activation significantly reduced novel object- and novel social investigative behavior. Activation of PL VIP neurons, however, produced a reduction in high calorie palatable food intake that was independent of food novelty. Neither IL nor PL VIP excitation changed motivation to obtain food reward. Our data show how neurochemically-defined populations of cortical interneurons can regulate specific aspects of food reward-driven behavior, resulting in a selective reduction in intake of highly valued food.
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Affiliation(s)
| | | | | | | | - Marieke K. Jones
- Health Sciences Library, University of Virginia, Charlottesville, Virginia, USA
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Singh P, Zhang Y, Sharma P, Covassin N, Soucek F, Friedman PA, Somers VK. Statins decrease leptin expression in human white adipocytes. Physiol Rep 2019; 6. [PMID: 29372612 PMCID: PMC5789723 DOI: 10.14814/phy2.13566] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2017] [Accepted: 12/09/2017] [Indexed: 12/26/2022] Open
Abstract
Statin use is associated with increased calorie intake and consequent weight gain. It is speculated that statin‐dependent improvements in lipid profile may undermine the perceived need to follow lipid‐lowering and other dietary recommendations leading consequently to increased calorie intake. However, increases in calorie intake in statin users may also be related to statin‐dependent decreases in satiety factors such as leptin, an adipocyte‐derived adipokine. The objective of our study was to examine the direct effects of statins on leptin expression. Adipocytes are the main source of circulating leptin. Therefore, we examined the effects of atorvastatin and simvastatin on leptin expression in cultured human white adipocytes. We show that treatment of white adipocytes with simvastatin and atorvastatin decreases leptin mRNA expression (simvastatin: P = 0.008, atorvastatin: P = 0.03) and leptin secretion (simvastatin: P = 0.0001, atorvastatin: P = 0.0001). Both simvastatin and atorvastatin mediate decreases in leptin expression via extracellular‐signal‐regulated kinases 1/2 and peroxisome proliferator‐activated receptor gamma pathways (simvastatin: P = 0.01, atorvastatin: P = 0.026). Additionally, statin treatment also induced expected increases in adiponectin, while decreasing monocyte chemoattractant protein 1 (MCP1) mRNA. Furthermore, statins increased secretion of both total as well as high molecular weight adiponectin while decreasing MCP1 secretion. To conclude, statins act directly on human white adipocytes to regulate adipokine secretion and decrease leptin expression. Leptin is an important satiety factor. Hence, statin‐dependent decreases in leptin may contribute, at least in part, to increases in food intake in statin users.
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Affiliation(s)
- Prachi Singh
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Yuebo Zhang
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Pragya Sharma
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Naima Covassin
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Filip Soucek
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota.,ICRC - Department of Cardiovascular Diseases, St. Anne's University Hospital, Brno, Czech Republic
| | - Paul A Friedman
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
| | - Virend K Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, Minnesota
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Forny-Germano L, De Felice FG, Vieira MNDN. The Role of Leptin and Adiponectin in Obesity-Associated Cognitive Decline and Alzheimer's Disease. Front Neurosci 2019; 12:1027. [PMID: 30692905 PMCID: PMC6340072 DOI: 10.3389/fnins.2018.01027] [Citation(s) in RCA: 130] [Impact Index Per Article: 26.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2019] [Accepted: 12/19/2019] [Indexed: 12/14/2022] Open
Abstract
Cross-talk between adipose tissue and central nervous system (CNS) underlies the increased risk of obese people to develop brain diseases such as cognitive and mood disorders. Detailed mechanisms for how peripheral changes caused by adipose tissue accumulation in obesity impact the CNS to cause brain dysfunction are poorly understood. Adipokines are a large group of substances secreted by the white adipose tissue to regulate a wide range of homeostatic processes including, but not limited to, energy metabolism and immunity. Obesity is characterized by a generalized change in the levels of circulating adipokines due to abnormal accumulation and dysfunction of adipose tissue. Altered adipokine levels underlie complications of obesity as well as the increased risk for the development of obesity-related comorbidities such as type 2 diabetes, cardiovascular and neurodegenerative diseases. Here, we review the literature for the role of adipokines as key mediators of the communication between periphery and CNS in health and disease. We will focus on the actions of leptin and adiponectin, two of the most abundant and well studied adipokines, in the brain, with particular emphasis on how altered signaling of these adipokines in obesity may lead to cognitive dysfunction and augmented risk for Alzheimer's disease. A better understanding of adipokine biology in brain disorders may prove of major relevance to diagnostic, prevention and therapy.
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Affiliation(s)
- Leticia Forny-Germano
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Fernanda G. De Felice
- Institute of Medical Biochemistry Leopoldo de Meis, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- Centre for Neuroscience Studies, Department of Psychiatry, Queen’s University, Kingston, ON, Canada
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Balland E, Chen W, Dodd GT, Conductier G, Coppari R, Tiganis T, Cowley MA. Leptin Signaling in the Arcuate Nucleus Reduces Insulin’s Capacity to Suppress Hepatic Glucose Production in Obese Mice. Cell Rep 2019; 26:346-355.e3. [DOI: 10.1016/j.celrep.2018.12.061] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Revised: 11/29/2018] [Accepted: 12/13/2018] [Indexed: 12/18/2022] Open
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Balland E, Chen W, Tiganis T, Cowley MA. Persistent Leptin Signaling in the Arcuate Nucleus Impairs Hypothalamic Insulin Signaling and Glucose Homeostasis in Obese Mice. Neuroendocrinology 2019; 109:374-390. [PMID: 30995667 DOI: 10.1159/000500201] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/04/2019] [Accepted: 04/02/2019] [Indexed: 11/19/2022]
Abstract
BACKGROUND Obesity is associated with reduced physiological responses to leptin and insulin, leading to the concept of obesity-associated hormonal resistance. OBJECTIVES Here, we demonstrate that contrary to expectations, leptin signaling not only remains functional but also is constantly activated in the arcuate nucleus of the hypothalamus (ARH) neurons of obese mice. This state of persistent response to endogenous leptin underpins the lack of response to exogenous leptin. METHODS AND RESULTS The study of combined leptin and insulin signaling demonstrates that there is a common pool of ARH neurons responding to both hormones. More importantly, we show that the constant activation of leptin receptor neurons in the ARH prevents insulin signaling in these neurons, leading to impaired glucose tolerance. Accordingly, antagonising leptin signaling in diet-induced obese (DIO) mice restores insulin signaling in the ARH and improves glucose homeostasis. Direct inhibition of PTP1B in the CNS restores arcuate insulin signaling similarly to leptin inhibition; this effect is likely to be mediated by AgRP neurons since PTP1B deletion specifically in AgRP neurons restores glucose and insulin tolerance in DIO mice. CONCLUSIONS Finally, our results suggest that the constant activation of arcuate leptin signaling in DIO mice increases PTP1B expression, which exerts an inhibitory effect on insulin signaling leading to impaired glucose homeostasis.
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Affiliation(s)
- Eglantine Balland
- Department of Physiology, Metabolism, Diabetes and Obesity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia,
| | - Weiyi Chen
- Department of Physiology, Metabolism, Diabetes and Obesity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Tony Tiganis
- Department of Biochemistry and Molecular Biology , Metabolism, Diabetes and Obesity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
| | - Michael A Cowley
- Department of Physiology, Metabolism, Diabetes and Obesity Program, Biomedicine Discovery Institute, Monash University, Clayton, Victoria, Australia
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