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Barrios V, Martín-Rivada Á, Martos-Moreno GÁ, Canelles S, Moreno-Macián F, De Mingo-Alemany C, Delvecchio M, Pajno R, Fintini D, Chowen JA, Argente J. Increased IGFBP Proteolysis, IGF-I Bioavailability, and Pappalysin Levels in Children With Prader-Willi Syndrome. J Clin Endocrinol Metab 2024; 109:e1776-e1786. [PMID: 38141219 DOI: 10.1210/clinem/dgad754] [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: 10/12/2023] [Revised: 12/18/2023] [Accepted: 12/21/2023] [Indexed: 12/25/2023]
Abstract
CONTEXT Prader-Willi syndrome (PWS) is associated with impaired growth hormone (GH) secretion and decreased insulin-like growth factor (IGF)-I levels. Pappalysins (PAPP-A, PAPP-A2) and stanniocalcins (STC-1, STC-2) regulate IGF binding-protein (IGFBP) cleavage and IGF bioavailability, but their implication in PWS is unknown. OBJECTIVE We determined serum levels of PAPP-As and STCs in association with IGF axis components in prepubertal and pubertal patients with PWS, also analyzing the effect of GH treatment. METHODS Forty children and adolescents with PWS and 120 sex- and age-matched controls were included. The effect of GH was evaluated at 6 months of treatment in 11 children. RESULTS Children with PWS had lower levels of total IGF-I, total and intact IGFBP-3, acid-labile subunit, intact IGFBP-4, and STC-1, and they had higher concentrations of free IGF-I, IGFBP-5, and PAPP-A. Patients with PWS after pubertal onset had decreased total IGF-I, total and intact IGFBP-3, and intact IGFBP-4 levels, and had increased total IGFBP-4, and STCs concentrations. GH treatment increased total IGF-I, total and intact IGFBP-3, and intact IGFBP-4, with no changes in PAPP-As, STCs, and free IGF-I levels. Standardized height correlated directly with intact IGFBP-3 and inversely with PAPP-As and the free/total IGF-I ratio. CONCLUSION The increase in PAPP-A could be involved in increased IGFBP proteolysis, promoting IGF-I bioavailability in children with PWS. Further studies are needed to establish the relationship between growth, GH resistance, and changes in the IGF axis during development and after GH treatment in these patients.
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Affiliation(s)
- Vicente Barrios
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Álvaro Martín-Rivada
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
| | - Gabriel Á Martos-Moreno
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid 28029, Spain
- Department of Pediatrics, Universidad Autónoma de Madrid, Madrid 28029, Spain
| | - Sandra Canelles
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid 28029, Spain
| | - Francisca Moreno-Macián
- Pediatric Endocrinology Unit, Hospital Universitario y Politécnico La Fe, Valencia 46009, Spain
| | - Carmen De Mingo-Alemany
- Pediatric Endocrinology Unit, Hospital Universitario y Politécnico La Fe, Valencia 46009, Spain
| | - Maurizio Delvecchio
- Department of Biotechnology and Applied Sciences, University of L'Aquila, Aquila 67100, Italy
| | - Roberta Pajno
- Department of Pediatrics, Endocrine Unit, IRCCS San Raffaele Scientific Institute, Milan 20132, Italy
| | - Danilo Fintini
- Ospedale Pediatrico Bambino Gesù, Prader-Willi Reference Center, Endocrinology and Diabetology Unit, IRCCS, Rome 00165, Italy
| | - Julie A Chowen
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid 28029, Spain
- IMDEA, Food Institute, CEIUAM+CSI, Cantoblanco, Madrid 28049, Spain
| | - Jesús Argente
- Departments of Pediatrics & Pediatric Endocrinology, Hospital Infantil Universitario Niño Jesús, Research Institute "La Princesa", Madrid 28009, Spain
- Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutriciόn (CIBEROBN), Instituto de Salud Carlos III, Madrid 28029, Spain
- Department of Pediatrics, Universidad Autónoma de Madrid, Madrid 28029, Spain
- IMDEA, Food Institute, CEIUAM+CSI, Cantoblanco, Madrid 28049, Spain
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Kishimura U, Soeda S, Ito D, Ueta Y, Harada M, Tanaka M, Taniura H. Pathological analysis of Prader-Willi syndrome using adipocytes. Biochem Biophys Res Commun 2024; 721:150124. [PMID: 38776833 DOI: 10.1016/j.bbrc.2024.150124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/06/2024] [Revised: 05/08/2024] [Accepted: 05/13/2024] [Indexed: 05/25/2024]
Abstract
Prader-Willi syndrome (PWS) is a complex epigenetic disorder caused by the deficiency of paternally expressed genes in chromosome 15q11-q13. This syndrome also includes endocrine dysfunction, leading to short stature, hypogonadism, and obscure hyperphagia. Although recent progress has been made toward understanding the genetic basis for PWS, the molecular mechanisms underlying its pathology in obesity remain unclear. In this study, we examined the adipocytic characteristics of two PWS-induced pluripotent stem cell (iPSC) lines: those with the 15q11-q13 gene deletion (iPWS cells) and those with 15q11-q13 abnormal methylation (M-iPWS cells). The transcript levels of the lipid-binding protein aP2 were decreased in iPWS and M-iPWS adipocytes. Flow-cytometry analysis showed that PWS adipocytes accumulated more lipid droplets than did normal individual adipocytes. Furthermore, glucose uptake upon insulin stimulation was attenuated compared to that in normal adipocytes. Overall, our results suggest a significantly increased lipid content and defective in glucose metabolism in PWS adipocytes.
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Affiliation(s)
- Urara Kishimura
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Shuhei Soeda
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan.
| | - Daiki Ito
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Yoko Ueta
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Maki Harada
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Mai Tanaka
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
| | - Hideo Taniura
- Laboratory of Neurochemistry, College of Pharmaceutical Sciences, Ritsumeikan University, Shiga, 525-8577, Japan
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Adeva-Andany MM, Domínguez-Montero A, Adeva-Contreras L, Fernández-Fernández C, Carneiro-Freire N, González-Lucán M. Body Fat Distribution Contributes to Defining the Relationship between Insulin Resistance and Obesity in Human Diseases. Curr Diabetes Rev 2024; 20:e160823219824. [PMID: 37587805 DOI: 10.2174/1573399820666230816111624] [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: 01/12/2023] [Revised: 04/28/2023] [Accepted: 05/31/2023] [Indexed: 08/18/2023]
Abstract
The risk for metabolic and cardiovascular complications of obesity is defined by body fat distribution rather than global adiposity. Unlike subcutaneous fat, visceral fat (including hepatic steatosis) reflects insulin resistance and predicts type 2 diabetes and cardiovascular disease. In humans, available evidence indicates that the ability to store triglycerides in the subcutaneous adipose tissue reflects enhanced insulin sensitivity. Prospective studies document an association between larger subcutaneous fat mass at baseline and reduced incidence of impaired glucose tolerance. Case-control studies reveal an association between genetic predisposition to insulin resistance and a lower amount of subcutaneous adipose tissue. Human peroxisome proliferator-activated receptorgamma (PPAR-γ) promotes subcutaneous adipocyte differentiation and subcutaneous fat deposition, improving insulin resistance and reducing visceral fat. Thiazolidinediones reproduce the effects of PPAR-γ activation and therefore increase the amount of subcutaneous fat while enhancing insulin sensitivity and reducing visceral fat. Partial or virtually complete lack of adipose tissue (lipodystrophy) is associated with insulin resistance and its clinical manifestations, including essential hypertension, hypertriglyceridemia, reduced HDL-c, type 2 diabetes, cardiovascular disease, and kidney disease. Patients with Prader Willi syndrome manifest severe subcutaneous obesity without insulin resistance. The impaired ability to accumulate fat in the subcutaneous adipose tissue may be due to deficient triglyceride synthesis, inadequate formation of lipid droplets, or defective adipocyte differentiation. Lean and obese humans develop insulin resistance when the capacity to store fat in the subcutaneous adipose tissue is exhausted and deposition of triglycerides is no longer attainable at that location. Existing adipocytes become large and reflect the presence of insulin resistance.
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Affiliation(s)
- María M Adeva-Andany
- Nephrology Division, Department of Internal Medicine, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406 Ferrol, Spain
| | - Alberto Domínguez-Montero
- Nephrology Division, Department of Internal Medicine, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406 Ferrol, Spain
| | | | - Carlos Fernández-Fernández
- Nephrology Division, Department of Internal Medicine, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406 Ferrol, Spain
| | - Natalia Carneiro-Freire
- Nephrology Division, Department of Internal Medicine, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406 Ferrol, Spain
| | - Manuel González-Lucán
- Nephrology Division, Department of Internal Medicine, Hospital General Juan Cardona, c/ Pardo Bazán s/n, 15406 Ferrol, Spain
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Horwitz A, Birk R. Adipose Tissue Hyperplasia and Hypertrophy in Common and Syndromic Obesity-The Case of BBS Obesity. Nutrients 2023; 15:3445. [PMID: 37571382 PMCID: PMC10421039 DOI: 10.3390/nu15153445] [Citation(s) in RCA: 9] [Impact Index Per Article: 9.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2023] [Revised: 07/16/2023] [Accepted: 07/31/2023] [Indexed: 08/13/2023] Open
Abstract
Obesity is a metabolic state generated by the expansion of adipose tissue. Adipose tissue expansion depends on the interplay between hyperplasia and hypertrophy, and is mainly regulated by a complex interaction between genetics and excess energy intake. However, the genetic regulation of adipose tissue expansion is yet to be fully understood. Obesity can be divided into common multifactorial/polygenic obesity and monogenic obesity, non-syndromic and syndromic. Several genes related to obesity were found through studies of monogenic non-syndromic obesity models. However, syndromic obesity, characterized by additional features other than obesity, suggesting a more global role of the mutant genes related to the syndrome and, thus, an additional peripheral influence on the development of obesity, were hardly studied to date in this regard. This review summarizes present knowledge regarding the hyperplasia and hypertrophy of adipocytes in common obesity. Additionally, we highlight the scarce research on syndromic obesity as a model for studying adipocyte hyperplasia and hypertrophy, focusing on Bardet-Biedl syndrome (BBS). BBS obesity involves central and peripheral mechanisms, with molecular and mechanistic alternation in adipocyte hyperplasia and hypertrophy. Thus, we argue that using syndromic obesity models, such as BBS, can further advance our knowledge regarding peripheral adipocyte regulation in obesity.
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Affiliation(s)
| | - Ruth Birk
- Department of Nutrition, Faculty of Health Sciences, Ariel University, Ariel 40700, Israel;
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Xu Y, Hou X, Guo H, Yao Z, Fan X, Xu C, Li G, Wang Y, Sun Y, Gao L, Song Y, Zhao J. CD16 + monocytes are involved in the hyper-inflammatory state of Prader-Willi Syndrome by single-cell transcriptomic analysis. Front Immunol 2023; 14:1153730. [PMID: 37251380 PMCID: PMC10213932 DOI: 10.3389/fimmu.2023.1153730] [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: 01/30/2023] [Accepted: 04/27/2023] [Indexed: 05/31/2023] Open
Abstract
Background Patients with Prader-Willi syndrome (PWS) have a reduced life expectancy due to inflammation-related disease including cardiovascular disease and diabetes. Abnormal activation of peripheral immune system is postulated as a contributor. However, detailed features of the peripheral immune cells in PWS have not been fully elucidated. Methods Serum inflammatory cytokines were measured in healthy controls (n=13) and PWS patients (n=10) using a 65- multiplex cytokine assays. Changes of the peripheral immune cells in PWS was assessed by single-cell RNA sequencing (scRNA-seq) and high-dimensional mass cytometry (CyTOF) using peripheral blood mononuclear cells (PBMCs) from PWS patients (n=6) and healthy controls (n=12). Results PWS patients exhibited hyper-inflammatory signatures in PBMCs and monocytes were the most pronounced. Most inflammatory serum cytokines were increased in PWS, including IL-1β, IL-2R, IL-12p70, and TNF-α. The characteristics of monocytes evaluated by scRNA-seq and CyTOF showed that CD16+ monocytes were significantly increased in PWS patients. Functional pathway analysis revealed that CD16+ monocytes upregulated pathways in PWS were closely associated with TNF/IL-1β- driven inflammation signaling. The CellChat analysis identified CD16+ monocytes transmitted chemokine and cytokine signaling to drive inflammatory process in other cell types. Finally, we explored the PWS deletion region 15q11-q13 might be responsible for elevated levels of inflammation in the peripheral immune system. Conclusion The study highlights that CD16+ monocytes contributor to the hyper-inflammatory state of PWS which provides potential targets for immunotherapy in the future and expands our knowledge of peripheral immune cells in PWS at the single cell level for the first time.
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Affiliation(s)
- Yunyun Xu
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Xu Hou
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Stem Cell Research Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Honglin Guo
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Zhenyu Yao
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Xiude Fan
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Chao Xu
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Guimei Li
- Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yanzhou Wang
- Department of Pediatric Orthopedics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yan Sun
- Department of Pediatrics, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Ling Gao
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Scientific Research Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
| | - Yongfeng Song
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
| | - Jiajun Zhao
- Department of Endocrinology, Shandong Provincial Hospital, Shandong University, Jinan, China
- Department of Endocrinology, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
- Shandong Clinical Research Center of Diabetes and Metabolic Diseases, Jinan, China
- Shandong Key Laboratory of Endocrinology and Lipid Metabolism, Jinan, China
- Shandong Prevention and Control Engineering Laboratory of Endocrine and Metabolic Diseases, Jinan, China
- Stem Cell Research Center, Shandong Provincial Hospital Affiliated to Shandong First Medical University, Jinan, China
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Chao Y, Gao L, Wang X, Cai Y, Shu Y, Zou X, Qin Y, Hu C, Dai Y, Zhu M, Shen Z, Zou C. Dysregulated adipose tissue expansion and impaired adipogenesis in Prader-Willi syndrome children before obesity-onset. Metabolism 2022; 136:155295. [PMID: 36007622 DOI: 10.1016/j.metabol.2022.155295] [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: 04/30/2022] [Revised: 08/10/2022] [Accepted: 08/18/2022] [Indexed: 10/31/2022]
Abstract
OBJECTIVE Prader-Willi syndrome (PWS) is a rare genetic imprinting disorder resulting from the expression loss of genes on the paternally inherited chromosome 15q11-13. Early-onset life-thriving obesity and hyperphagia represent the clinical hallmarks of PWS. The noncoding RNA gene SNORD116 within the minimal PWS genetic lesion plays a critical role in the pathogenesis of the syndrome. Despite advancements in understanding the genetic basis for PWS, the pathophysiology of obesity development in PWS remains largely uncharacterized. Here, we aimed to investigate the signatures of adipose tissue development and expansion pathways and associated adipose biology in PWS children without obesity-onset at an early stage, mainly from the perspective of the adipogenesis process, and further elucidate the underlying molecular mechanisms. METHODS We collected inguinal (subcutaneous) white adipose tissues (ingWATs) from phase 1 PWS and healthy children with normal weight aged from 6 M to 2 Y. Adipose morphology and histological characteristics were assessed. Primary adipose stromal vascular fractions (SVFs) were isolated, cultured in vitro, and used to determine the capacity and function of white and beige adipogenic differentiation. High-throughput RNA-sequencing (RNA-seq) was performed in adipose-derived mesenchymal stem cells (AdMSCs) to analyze transcriptome signatures in PWS subjects. Transient repression of SNORD116 was conducted to evaluate its functional relevance in adipogenesis. The changes in alternative pre-mRNA splicing were investigated in PWS and SNORD116 deficient cells. RESULTS In phase 1 PWS children, impaired white adipose tissue (WAT) development and unusual fat expansion occurred long before obesity onset, which was characterized by the massive enlargement of adipocytes accompanied by increased apoptosis. White and beige adipogenesis programs were impaired and differentiated adipocyte functions were disturbed in PWS-derived SVFs, despite increased proliferation capacity, which were consistent with the results of RNA-seq analysis of PWS AdMSCs. We also experimentally validated disrupted beige adipogenesis in adipocytes with transient SNORD116 downregulation. The transcript and protein levels of PPARγ, the adipogenesis master regulator, were significantly lower in PWS than in control AdMSCs as well as in SNORD116 deficient AdMSCs/adipocytes than in scramble (Scr) cells, resulting in the inhibited adipogenic program. Additionally, through RNA-seq, we observed aberrant transcriptome-wide alterations in alternative RNA splicing patterns in PWS cells mediated by SNORD116 loss and specifically identified a changed PRDM16 gene splicing profile in vitro. CONCLUSIONS Imbalance in the WAT expansion pathway and developmental disruption are primary defects in PWS displaying aberrant adipocyte hypertrophy and impaired adipogenesis process, in which SNORD116 deficiency plays a part. Our findings suggest that dysregulated adiposity specificity existing at an early phase is a potential pathological mechanism exacerbating hyperphagic obesity onset in PWS. This mechanistic evidence on adipose biology in young PWS patients expands knowledge regarding the pathogenesis of PWS obesity and may aid in developing a new therapeutic strategy targeting disturbed adipogenesis and driving AT plasticity to combat abnormal adiposity and associated metabolic disorders for PWS patients.
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Affiliation(s)
- Yunqi Chao
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Lei Gao
- Department of Urology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Xiangzhi Wang
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Yuqing Cai
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Yingying Shu
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Xinyi Zou
- Zhejiang University City College, Hangzhou 310015, Zhejiang, China
| | - Yifang Qin
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Chenxi Hu
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Yangli Dai
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Mingqiang Zhu
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Zheng Shen
- Lab Center, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China
| | - Chaochun Zou
- Department of Endocrinology, The Children's Hospital, School of Medicine, Zhejiang University, Hangzhou 310052, Zhejiang, China.
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Vlug LE, Delhanty PJD, Neelis EG, Huisman M, Visser JA, Rings EHHM, Wijnen RMH, Nagelkerke SCJ, Tabbers MM, Hulst JM, de Koning BAE. Ghrelin Levels in Children With Intestinal Failure Receiving Long-Term Parenteral Nutrition. Front Nutr 2022; 9:896328. [PMID: 35634374 PMCID: PMC9131070 DOI: 10.3389/fnut.2022.896328] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/14/2022] [Accepted: 04/22/2022] [Indexed: 12/02/2022] Open
Abstract
Background Children with intestinal failure (IF) require parenteral nutrition (PN). Transition to oral and enteral nutrition (EN) can be difficult also due to abnormal gastrointestinal motility. The gut hormone ghrelin is increased in states of negative energy balance, functioning to preserve euglycemia, and also has appetite stimulating and prokinetic properties. We aimed to evaluate and compare ghrelin levels in children with IF, and to assess the relationship with PN-dependency. Methods In this exploratory prospective multicenter study, plasma acylated (AG) and unacylated (UAG) ghrelin levels were measured in children with short bowel syndrome (SBS) and with functional IF (pseudo-obstruction or any enteropathy) and compared with healthy control subjects. Spearman’s rho (rs) was used to assess correlations of AG and UAG with PN-dependency (%PN) and parenteral glucose intake. Results Sixty-four samples from 36 IF-patients were analyzed. Median baseline AG and UAG levels were respectively 279.2 and 101.0 pg/mL in children with SBS (n = 16), 126.4 and 84.5 pg/mL in children with functional IF (n = 20) and 82.4 and 157.3 pg/mL in healthy children (n = 39). AG levels were higher in children with SBS and functional IF than in healthy children (p = 0.002 and p = 0.023, respectively). In SBS, AG positively correlated with %PN (rs = 0.5, p = 0.005) and parenteral glucose intake (rs = 0.6, p = 0.003). These correlations were not observed in functional IF. Conclusion Children with IF had raised AG levels which could be related to starvation of the gut. The positive correlation between AG and glucose infusion rate in SBS suggests an altered glucoregulatory function.
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Affiliation(s)
- Lotte E. Vlug
- Division of Gastroenterology, Department of Pediatrics, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Patric J. D. Delhanty
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Esther G. Neelis
- Division of Gastroenterology, Department of Pediatrics, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Martin Huisman
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Jenny A. Visser
- Department of Internal Medicine, Erasmus MC, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Edmond H. H. M. Rings
- Division of Gastroenterology, Department of Pediatrics, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
- Division of Gastroenterology, Department of Pediatrics, Willem Alexander Children’s Hospital, Leiden University Medical Center, Leiden, Netherlands
| | - René M. H. Wijnen
- Department of Pediatric Surgery, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
| | - Sjoerd C. J. Nagelkerke
- Division of Gastroenterology, Department of Pediatrics, Emma Children’s Hospital, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Merit M. Tabbers
- Division of Gastroenterology, Department of Pediatrics, Emma Children’s Hospital, Amsterdam University Medical Centers, Amsterdam, Netherlands
| | - Jessie M. Hulst
- Division of Paediatric Gastroenterology, Hepatology and Nutrition, The Hospital for Sick Children, Toronto, ON, Canada
| | - Barbara A. E. de Koning
- Division of Gastroenterology, Department of Pediatrics, Erasmus MC Sophia Children’s Hospital, University Medical Center Rotterdam, Rotterdam, Netherlands
- *Correspondence: Barbara A. E. de Koning,
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Qian Y, Xia F, Zuo Y, Zhong M, Yang L, Jiang Y, Zou C. Do patients with Prader-Willi syndrome have favorable glucose metabolism? Orphanet J Rare Dis 2022; 17:187. [PMID: 35525976 PMCID: PMC9077846 DOI: 10.1186/s13023-022-02344-3] [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: 01/08/2022] [Accepted: 04/26/2022] [Indexed: 11/26/2022] Open
Abstract
Background In recent years, more studies have observed that patients with Prader–Willi syndrome have lower insulin levels and lower insulin resistance than body mass index-matched controls, which may suggest protected glucose metabolism. Method The PubMed and Web of Science online databases were searched to identify relevant studies published in the English language using the terms “Prader–Willi syndrome” with “glucose”, “insulin”, “diabetes mellitus”, “fat”, “adipo*”, “ghrelin”, “oxytocin”, “irisin” or “autonomic nervous system”. Results The prevalence of impaired glucose intolerance, type 2 diabetes mellitus and some other obesity-associated complications in patients with Prader–Willi syndrome tends to be lower when compared to that in general obesity, which is consistent with the hypothetically protected glucose metabolism. Factors including adipose tissue, adiponectin, ghrelin, oxytocin, irisin, growth hormone and the autonomic nervous system possibly modulate insulin sensitivity in patients with Prader–Willi syndrome. Conclusion Although lower insulin levels, lower IR and protected glucose metabolism are widely reported in PWS patients, the causes are still mysterious. Based on existing knowledge, we cannot determine which factor is of utmost importance and what are the underlying mechanisms, and further research is in urgent need.
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Affiliation(s)
- Yanjie Qian
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China
| | - Fangling Xia
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China
| | - Yiming Zuo
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China
| | - Mianling Zhong
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China
| | - Lili Yang
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China
| | - Yonghui Jiang
- Department of Genetics, Yale University School of Medicine, New Haven, USA
| | - Chaochun Zou
- Department of Endocrinology, The Children's Hospital of Zhejiang University School of Medicine, National Clinical Research Center for Child Health, No 3333 Binsheng Road, Hangzhou, 310051, China.
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9
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Impact of Deprivation on Obesity in Children with PWS. J Clin Med 2022; 11:jcm11082255. [PMID: 35456348 PMCID: PMC9031951 DOI: 10.3390/jcm11082255] [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: 02/15/2022] [Revised: 04/04/2022] [Accepted: 04/13/2022] [Indexed: 02/04/2023] Open
Abstract
Our study aimed to evaluate the social deprivation score in families with a child with Prader-Willi syndrome (PWS) and analyze its impact on the occurrence of obesity in the affected child. We included 147 children with PWS followed in our reference center with Evaluation of the Deprivation and Inequalities of Health in Healthcare Centres by the EPICES score. Deprivation (EPICES ≥ 30) was found in 25.9% of the population. Compared with the non-obese children, children with obesity had more deprived families, 50.0 vs. 18.0% (p = 0.0001); were older, with a median of 10.1 vs. 6.0 years (p = 0.0006); were less frequently treated with growth hormone (GH), 80.6 vs. 91.9% (p = 0.07). The mothers of obese children were more frequently obese, 46.9 vs. 13.3% (p < 0.0001), and achieved high study levels less frequently (≥Bac+2), 40.9 vs. 70.1% (p = 0.012). The multivariate logistic regression indicated that age, living in a deprived family, and having a mother with overweight/obesity were significantly associated with an increased risk of obesity (respectively, OR = 3.31 (1.26−8.73) and OR = 6.76 (2.36−19.37)). The same risk factors of obesity observed in the general population were found in children with PWS. Families at risk, including social deprivation, will require early identification and a reinforced approach to prevent obesity.
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10
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Clerc A, Coupaye M, Mosbah H, Pinto G, Laurier V, Mourre F, Merrien C, Diene G, Poitou C, Tauber M. Diabetes Mellitus in Prader-Willi Syndrome: Natural History during the Transition from Childhood to Adulthood in a Cohort of 39 Patients. J Clin Med 2021; 10:jcm10225310. [PMID: 34830599 PMCID: PMC8625265 DOI: 10.3390/jcm10225310] [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: 09/29/2021] [Revised: 10/28/2021] [Accepted: 11/09/2021] [Indexed: 02/05/2023] Open
Abstract
Type 2 diabetes mellitus (T2DM) affects 20% of patients with Prader-Willi syndrome (PWS), with many cases diagnosed during the transition period. Our aim was to describe the natural history of T2DM in patients with PWS before the age of 25 years and to develop screening and preventive strategies. Thirty-nine patients followed in the French PWS Reference Center were included (median age 25.6 years [23.7; 31.7]). Twenty-one had been treated with growth hormone (GH), fifteen had not, and three had an unknown status. The median age at T2DM diagnosis was 16.8 years (11–24) and the median BMI was 39 kg/m2 [34.6; 45], with 34/35 patients living with obesity. The patients displayed frequent psychiatric (48.3% hospitalization,) and metabolic (56.4% hypertriglyceridemia,) comorbidities and a parental history of T2DM (35.7%) or overweight (53.6%) compared to the PWS general population. There was no difference in BMI and metabolic complications between the GH-treated and non-GH-treated groups at T2DM diagnosis. Patients with PWS who develop early T2DM have severe obesity, a high frequency of psychiatric and metabolic disorders, and a family history of T2DM and overweight. These results underline the need for early identification of patients at risk, prevention of obesity, and repeated blood glucose monitoring during the transition period.
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Affiliation(s)
- Alice Clerc
- Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service d’Endocrinologie, Obésités, Maladies Osseuses, Génétique et Gynécologie Médicale, Hôpital des Enfants, 31059 Toulouse, France; (A.C.); (G.D.)
| | - Muriel Coupaye
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service de Nutrition, Hôpital Pitié-Salpêtrière, 75013 Paris, France; (M.C.); (H.M.); (C.P.)
| | - Héléna Mosbah
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service de Nutrition, Hôpital Pitié-Salpêtrière, 75013 Paris, France; (M.C.); (H.M.); (C.P.)
| | - Graziella Pinto
- Assistance Publique-Hôpitaux de Paris, Service d’Endocrinologie, Gynécologie et Diabétologie Pédiatrique, Hôpital Necker-Enfants Malades, 75743 Paris, France;
| | - Virginie Laurier
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Hôpital Marin d’Hendaye, 64701 Hendaye, France; (V.L.); (F.M.); (C.M.)
| | - Fabien Mourre
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Hôpital Marin d’Hendaye, 64701 Hendaye, France; (V.L.); (F.M.); (C.M.)
| | - Christine Merrien
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Hôpital Marin d’Hendaye, 64701 Hendaye, France; (V.L.); (F.M.); (C.M.)
| | - Gwenaëlle Diene
- Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service d’Endocrinologie, Obésités, Maladies Osseuses, Génétique et Gynécologie Médicale, Hôpital des Enfants, 31059 Toulouse, France; (A.C.); (G.D.)
- Inserm UMR 1295—CERPOP (Centre d’Epidémiologie et de Recherche en Santé des POPulations), Équipe SPHERE (Santé Périnatale, Pédiatrique et des Adolescents: Approche Épidémiologique et Évaluative), Université Toulouse III Paul Sabatier, 31062 Toulouse, France
| | - Christine Poitou
- Assistance Publique-Hôpitaux de Paris, Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service de Nutrition, Hôpital Pitié-Salpêtrière, 75013 Paris, France; (M.C.); (H.M.); (C.P.)
- UMRS 1269, Faculté de Médecine Sorbonne Université, INSERM, Nutrition et Obésité: Approches Systémiques «NutriOmics», 75006 Paris, France
| | - Maithé Tauber
- Centre de Référence Maladies Rares (PRADORT, Syndrome de Prader-Willi et Autres Formes Rares d’Obésité avec Troubles du Comportement Alimentaire), Service d’Endocrinologie, Obésités, Maladies Osseuses, Génétique et Gynécologie Médicale, Hôpital des Enfants, 31059 Toulouse, France; (A.C.); (G.D.)
- Institut Toulousain des Maladies Infectieuses et Inflammatoires (Infinity) INSERM UMR1291—CNRS UMR5051—Université Toulouse III, 31062 Toulouse, France
- Correspondence:
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11
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Faienza MF, Brunetti G, Grugni G, Fintini D, Convertino A, Pignataro P, Crinò A, Colucci S, Grano M. The genetic background and vitamin D supplementation can affect irisin levels in Prader-Willi syndrome. J Endocrinol Invest 2021; 44:2261-2271. [PMID: 33656700 PMCID: PMC8421289 DOI: 10.1007/s40618-021-01533-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2020] [Accepted: 02/10/2021] [Indexed: 11/07/2022]
Abstract
BACKGROUND Prader-Willi syndrome (PWS) is associated to distinctive clinical symptoms, including obesity, cognitive and behavioral disorders, and bone impairment. Irisin is a myokine that acts on several target organs including brain adipose tissue and bone. The present study was finalized to explore circulating levels of irisin in children and adult PWS patients. METHODS Seventy-eight subjects with PWS, 26 children (15 females, mean age 9.48 ± 3.6 years) and 52 adults (30 females, mean age 30.6 ± 10.7) were enrolled. Irisin serum levels were measured in patients and controls. Its levels were related with anthropometric and metabolic parameters, cognitive performance and bone mineral density either in pediatric or adult PWS. Multiple regression analysis was also performed. RESULTS Irisin serum levels in PWS patients did not show different compared with controls. A more in-depth analysis showed that both pediatric and adult PWS with DEL15 displayed significantly reduced irisin levels compared to controls. Otherwise, no differences in irisin concentration were found in UPD15 patients with respect to controls. Our study revealed that in pediatric PWS the 25(OH) vitamin-D levels affected irisin serum concentration. Indeed, patients who were not supplemented with vitamin D showed lower irisin levels than controls and patients performing the supplementation. Multiple regression analysis showed that irisin levels in pediatric and adult PWS were predicted by the genetic background and 25(OH)-vitamin D levels, whereas in a group of 29 adult PWS also by intelligent quotient. CONCLUSION We demonstrated the possible role of genetic background and vitamin-D supplementation on irisin serum levels in PWS patients.
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Affiliation(s)
- M F Faienza
- Department of Biomedical Sciences and Human Oncology, Section of Pediatrics, University of Bari 'A. Moro', Bari, Italy
| | - G Brunetti
- Department of Biosciences, Biotechnologies and Biopharmaceutics, University of Bari 'A. Moro', Bari, Italy
| | - G Grugni
- Division of Auxology, Istituto Auxologico Italiano, Research Institute, Verbania, Italy
| | - D Fintini
- Endocrinology Unit, Pediatric University Department, Bambino Gesù Children's Hospital, Rome, Italy
| | - A Convertino
- Endocrinology Unit, Pediatric University Department, Bambino Gesù Children's Hospital, Rome, Italy
| | - P Pignataro
- Department of Emergency and Organ Transplantation, University of Bari 'A. Moro', Piazza Giulio Cesare, 11, 70124, Bari, Italy
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Human Anatomy and Histology, University of Bari 'A. Moro', Bari, Italy
| | - A Crinò
- Reference Center for Prader-Willi Syndrome, Bambino Gesù Hospital, Research Institute, Via Torre di Palidoro, Palidoro, Rome, Italy
| | - S Colucci
- Department of Basic Medical Sciences, Neuroscience and Sense Organs, Section of Human Anatomy and Histology, University of Bari 'A. Moro', Bari, Italy
| | - M Grano
- Department of Emergency and Organ Transplantation, University of Bari 'A. Moro', Piazza Giulio Cesare, 11, 70124, Bari, Italy.
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12
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Tauber M, Diene G. Prader-Willi syndrome: Hormone therapies. HANDBOOK OF CLINICAL NEUROLOGY 2021; 181:351-367. [PMID: 34238470 DOI: 10.1016/b978-0-12-820683-6.00026-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Prader-Willi syndrome (PWS) is a rare genetic neurodevelopmental disorder linked to the lack of expression of specific maternally imprinted genes located in the chromosomal region 15q11-q13. Impaired hypothalamic development and function explain most of the phenotype that is characterized by a specific trajectory from anorexia at birth to excessive weight gain at later ages, which is accompanied by hyperphagia and early severe obesity, as well as by other hormonal deficiencies, behavioral deficits, and dysautonomia. In almost all patients, their endocrine dysfunction involves growth hormone deficiency and hypogonadism, which originate from a combination of both peripheral and hypothalamic origin, central hypothyroidism in 40%, precocious adrenarche in 30% of the cases, and in rare cases, also adrenocorticotropin deficiency and precocious puberty. In addition, the oxytocin (OXT) and ghrelin systems are impaired in most patients and involved in a poor suckling response at birth, and hyperphagia with food addiction, poor social skills, and emotional dysregulation. Current hormonal replacement treatments are the same as used in classical hormonal deficiencies, and recombinant human GH treatment is registered since 2000 and has dramatically changed the phenotype of these children. OXT and OXT analogue treatments are currently investigated as well as new molecules targeting the ghrelin system. The severe condition of PWS can be seen as a model to improve the fine description and treatments of hypothalamic dysfunction.
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Affiliation(s)
- Maithé Tauber
- Centre de Référence du Syndrome de Prader-Willi, Hôpital des Enfants, CHU Toulouse, Toulouse, France.
| | - Gwenaelle Diene
- Centre de Référence du Syndrome de Prader-Willi, Hôpital des Enfants, CHU Toulouse, Toulouse, France
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13
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Tauber M, Hoybye C. Endocrine disorders in Prader-Willi syndrome: a model to understand and treat hypothalamic dysfunction. Lancet Diabetes Endocrinol 2021; 9:235-246. [PMID: 33647242 DOI: 10.1016/s2213-8587(21)00002-4] [Citation(s) in RCA: 66] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/07/2020] [Revised: 12/22/2020] [Accepted: 12/23/2020] [Indexed: 12/15/2022]
Abstract
Prader-Willi syndrome is a rare genetic neurodevelopmental disorder resulting from the loss of expression of maternally imprinted genes located in the paternal chromosomal region, 15q11-13. Impaired hypothalamic development and function is the cause of most of the phenotypes comprising the developmental trajectory of Prader-Willi syndrome: from anorexia at birth to excessive weight gain preceding hyperphagia, and early severe obesity with hormonal deficiencies, behavioural problems, and dysautonomia. Growth hormone deficiency, hypogonadism, hypothyroidism, premature adrenarche, corticotropin deficiency, precocious puberty, and glucose metabolism disorders are the main endocrine dysfunctions observed. Additionally, as a result of hypothalamic dysfunction, oxytocin and ghrelin systems are impaired in most patients. Standard pituitary and gonadal hormone replacement therapies are required. In this Review, we discuss Prader-Willi syndrome as a model of hypothalamic dysfunction, and provide a comprehensive description of the accumulated knowledge on genetics, pathophysiology, and treatment approaches of this rare disorder.
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Affiliation(s)
- Maithé Tauber
- Centre de Référence du Syndrome de Prader-Willi, Hôpital des Enfants, Toulouse, France; Axe Pédiatrique du CIC 9302/INSERM, Hôpital des Enfants, Toulouse, France; Institut Toulousain des Maladies Infectieuses et Inflammatoires, INSERM UMR1291, CNRS UMR5051, Université Toulouse III, Toulouse, France, France; International Prader-Willi Syndrome Organisation, Cambridge, UK.
| | - Charlotte Hoybye
- International Prader-Willi Syndrome Organisation, Cambridge, UK; Department of Endocrinology, Karolinska University Hospital and Department of Molecular Medicine and Surgery, Karolinska Institute, Stockholm, Sweden
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14
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A pro-inflammatory phenotype is associated with behavioural traits in children with Prader-Willi syndrome. Eur Child Adolesc Psychiatry 2021; 30:899-908. [PMID: 32495042 PMCID: PMC8140962 DOI: 10.1007/s00787-020-01568-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Accepted: 05/27/2020] [Indexed: 12/16/2022]
Abstract
Several lines of evidence indicate that immune-inflammatory alterations are widely observed in various mental disorders. Genetic syndromes with high risk of psychiatric disorders may constitute a model for studies investigating this phenomenon. One of such genetically determined neurodevelopmental disorders is the Prader-Willi syndrome (PWS). Therefore, we aimed to profile a broad panel of immune-inflammatory markers in patients with PWS, taking into account co-morbid psychopathology. Participants were 20 children with PWS, and 20 healthy children matched for age, sex and body mass index. Behavioural symptoms and co-occurring psychopathological symptoms were assessed using the Child Behaviour Checklist (CBCL). We found significantly elevated levels of interleukin (IL)-1β and IL-13 in patients with PWS. There were significant positive correlations between the levels of IL-1β and scores of the following externalizing and internalizing CBCL domains: withdrawn/depressed, social problems, thought problems, attention problems, delinquent and aggressive behaviour in PWS children. Moreover, higher levels of IL-13 were associated with more severe psychopathology in terms of social and attention problems as well as delinquent and aggressive behaviour. Our findings imply that subclinical inflammation, observed as elevated IL-1β and IL-13 levels, appears only in PWS patients and is correlated to several psychopathological symptoms.
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15
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Hirsch HJ, Gross-Tsur V, Sabag Y, Nice S, Genstil L, Benarroch F, Constantini N. Myokine levels after resistance exercise in young adults with Prader-Willi syndrome (PWS). Am J Med Genet A 2019; 182:115-121. [PMID: 31692257 DOI: 10.1002/ajmg.a.61391] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 09/27/2019] [Accepted: 09/27/2019] [Indexed: 12/30/2022]
Abstract
Individuals with PWS require marked caloric restriction and daily exercise to prevent morbid obesity. Lower energy expenditure, hypotonia, decreased muscle mass, and cognitive impairment make exercise challenging for this population. Exercise guidelines include resistance training as an important component. Myokine responses to resistance exercise may mediate beneficial metabolic effects. We aimed to determine if young PWS adults can perform a resistance exercise program and to measure myokine responses in PWS versus age- and BMI-matched controls. Each group included 11 participants (7M/4F). Ages and BMI for PWS and controls were 30.7 ± 4.6 versus 30.1 ± 4.3 years and 28.3 ± 4.3 versus 28.2 ± 4.2 kg/m2 , respectively. Glucose, creatine kinase (CK), lactate, and myokines were measured before, after, 30, and 60 min after completing eight resistance exercises. Myokines were assayed using a multiplex myokine panel (Merck Millipore). CK was lower in PWS versus controls (62 ± 16 vs.322 ± 100 U/L, p < .04). Peak lactate was 3.7 ± 0.7 in PWS versus 7.3 ± 0.7 mmol/Lin controls (p < .001). The increase in interleukin-6 was similar in PWS and controls (41 ± 16% and 35 ± 10%, respectively). Pre- and post-exercise levels of the six myokines assayed showed no consistent differences between the PWS and control participants. PWS young adults are capable of performing resistance/strength-building exercise. The lower CK and peak lactate levels in PWS may reflect decreased muscle mass in this population. Further studies are needed to determine optimal exercise regimens and assess the role of myokines incontributing to the metabolic phenotype of PWS.
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Affiliation(s)
- Harry J Hirsch
- Multidisciplinary Prader-Willi Syndrome Clinic, Neuropediatric Unit, Department of Pediatrics, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Varda Gross-Tsur
- Multidisciplinary Prader-Willi Syndrome Clinic, Neuropediatric Unit, Department of Pediatrics, Shaare Zedek Medical Center, Jerusalem, Israel.,The Hebrew University School of Medicine, Jerusalem, Israel
| | - Yanir Sabag
- The Hebrew University School of Medicine, Jerusalem, Israel
| | - Shachar Nice
- Heidi Rothberg Sport Medicine Center, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Larry Genstil
- Multidisciplinary Prader-Willi Syndrome Clinic, Neuropediatric Unit, Department of Pediatrics, Shaare Zedek Medical Center, Jerusalem, Israel
| | - Fortu Benarroch
- Multidisciplinary Prader-Willi Syndrome Clinic, Neuropediatric Unit, Department of Pediatrics, Shaare Zedek Medical Center, Jerusalem, Israel.,The Hebrew University School of Medicine, Jerusalem, Israel.,Herman Dana Division of Child and Adolescent Psychiatry, Hadassah-Hebrew University Medical Center, Jerusalem, Israel
| | - Naama Constantini
- The Hebrew University School of Medicine, Jerusalem, Israel.,Heidi Rothberg Sport Medicine Center, Shaare Zedek Medical Center, Jerusalem, Israel
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Rubin DA, Duran AT, Haqq AM, Gertz ER, Dumont-Driscoll M. Changes in cardiometabolic markers in children with Prader-Willi syndrome and nonsyndromic obesity following participation in a home-based physical activity intervention. Pediatr Obes 2018; 13:734-743. [PMID: 30280511 DOI: 10.1111/ijpo.12462] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/28/2018] [Revised: 06/21/2018] [Accepted: 07/02/2018] [Indexed: 12/24/2022]
Abstract
BACKGROUND Physical activity is associated with improved cardiometabolic markers in children with nonsyndromic obesity (NSO). Prader-Willi Syndrome (PWS) is a neurodevelopmental disorder characterized by obesity. OBJECTIVE To compare cardiometabolic changes in response to a home-based parent-facilitated physical activity intervention between children with PWS or with NSO. METHODS Participants included 18 children with PWS (age = 10.5 ± 0.7y; body fat = 44.6 ± 2.0%) and 30 children with NSO (age = 9.7 ± 0.2y; body fat = 44.8 ± 1.2%). Active Play @ Home was a 24-week physical activity intervention curriculum containing playground-based and active video games completed 4 days per week. Pre- and post-intervention measurements included physical activity, body composition, blood samples analysed for glucose, insulin, lipids and cytokines, and insulin resistance computed using the homeostatic model of assessment for insulin resistance (HOMA-IR). RESULTS All children (n = 48) showed a significant decrease in Interleukin-8 (3.64 ± 0.24 vs. 3.06 ± 0.22 pg/mL). Children with obesity who did not gain or who lost body fat percentage (n = 18) demonstrated a significant decrease in HOMA-IR (3.17 ± 0.39 vs. 2.72 ± 0.34) and an increase in high-density lipoprotein (44.30 ± 2.51 vs. 47.29 ± 2.59 mg/dL). All other measurements showed no significant changes. CONCLUSIONS The most favourable changes in cardiometabolic factors were observed in children with nonsyndromic obesity who demonstrated no gain or a decrease in body fat percentage.
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Affiliation(s)
- D A Rubin
- Department of Kinesiology, California State University, Fullerton, CA, USA
| | - A T Duran
- Department of Kinesiology, California State University, Fullerton, CA, USA
| | - A M Haqq
- Department of Pediatrics, University of Alberta, Edmonton, Alberta, Canada
| | - E R Gertz
- Obesity and Metabolism Research, United States Department of Agriculture, Davis, CA, USA
| | - M Dumont-Driscoll
- Department of Pediatrics, College of Medicine, University of Florida, Gainesville, FL, USA
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17
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McAlister KL, Fisher KL, Dumont-Driscoll MC, Rubin DA. The relationship between metabolic syndrome, cytokines and physical activity in obese youth with and without Prader-Willi syndrome. J Pediatr Endocrinol Metab 2018; 31:837-845. [PMID: 29975666 DOI: 10.1515/jpem-2017-0539] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Accepted: 06/04/2018] [Indexed: 12/21/2022]
Abstract
BACKGROUND The objective of this study was to examine the associations between adiposity, metabolic syndrome (MetS), cytokines and moderate-to-vigorous physical activity (MVPA) in youth with Prader-Willi syndrome (PWS) and non-syndromic obesity (OB). METHODS Twenty-one youth with PWS and 34 with OB aged 8-15 years participated. Measurements included body composition, blood pressure, fasting blood markers for glucose control, lipids and inflammation and MVPA. Group differences for adiposity, MetS, blood parameters and MVPA were determined using independent t-tests and chi-square (χ2) analyses. Bivariate correlations and analysis of variance (ANOVA) examined the associations between adiposity, MetS severity, cytokines and MVPA. RESULTS PWS presented similar percentage of body fat (%), lower body mass index (BMI) z-scores, insulin resistance, triglycerides, MetS severity, C-reactive protein (CRP), tumor necrosis factor-α (TNF-α) and MVPA and higher high-density lipoprotein (HDL) and adiponectin (ADP) than OB. Fewer PWS presented MetS based on BMI z-score (61.9% vs. 91.2%) and glucose (14.3% vs. 44.1%) compared to OB. In all youth, MetS severity was significantly associated with body fat %, ADP, interleukin-6 (IL-6) and TNF-α and also with CRP in PWS, but associations became non-significant for CRP and IL-6 when controlling for body fat %. In PWS, those with low MVPA had significantly higher TNF-α than those with high MVPA (1.80±0.45 vs. 1.39±0.26 pg/mL). CONCLUSIONS Although PWS presented better cardiometabolic profiles than OB and lower MetS risk, associations between body fat, MetS and cytokines were somewhat similar for both groups, with the exception of CRP. Results suggest a potential role for MVPA related to MetS and inflammation and extend associations shown in OB to PWS.
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Affiliation(s)
- Kelsey L McAlister
- California State University, Fullerton, Department of Kinesiology, Fullerton, CA, USA
| | - Koren L Fisher
- California State University, Fullerton, Department of Kinesiology, Fullerton, CA, USA
| | | | - Daniela A Rubin
- California State University, Fullerton, Department of Kinesiology, Fullerton, CA, USA
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van Nieuwpoort IC, Twisk JWR, Curfs LMG, Lips P, Drent ML. Body composition, adipokines, bone mineral density and bone remodeling markers in relation to IGF-1 levels in adults with Prader-Willi syndrome. INTERNATIONAL JOURNAL OF PEDIATRIC ENDOCRINOLOGY 2018; 2018:1. [PMID: 29371863 PMCID: PMC5771040 DOI: 10.1186/s13633-018-0055-4] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 07/19/2017] [Accepted: 01/10/2018] [Indexed: 12/03/2022]
Abstract
Background In patients with Prader-Willi syndrome (PWS) body composition is abnormal and alterations in appetite regulating factors, bone mineral density and insulin-like growth factor-1 (IGF-1) levels have been described. Studies in PWS adults are limited. In this study, we investigated body composition, appetite regulating peptides, bone mineral density and markers of bone remodeling in an adult PWS population. Furthermore, we investigated the association between these different parameters and IGF-1 levels because of the described similarities with growth hormone deficient patients. Methods In this cross-sectional observational cohort study in a university hospital setting we studied fifteen adult PWS patients. Anthropometric and metabolic parameters, IGF-1 levels, bone mineral density and bone metabolism were evaluated. The homeostasis model assessment of insulin resistance (HOMA2-IR) was calculated. Fourteen healthy siblings served as a control group for part of the measurements. Results In the adult PWS patients, height, fat free mass, IGF-1 and bone mineral content were significantly lower when compared to controls; body mass index (BMI), waist, waist-to-hip ratio and fat mass were higher. There was a high prevalence of osteopenia and osteoporosis in the PWS patients. Also, appetite regulating peptides and bone remodelling markers were aberrant when compared to reference values. Measurements of body composition were significantly correlated to appetite regulating peptides and high-sensitive C-reactive protein (hs-CRP), furthermore HOMA was correlated to BMI and adipokines. Conclusion In adults with Prader-Willi syndrome alterations in body composition, adipokines, hs-CRP and bone mineral density were demonstrated but these were not associated with IGF-1 levels. Further investigations are warranted to gain more insight into the exact pathophysiology and the role of these alterations in the metabolic and cardiovascular complications seen in PWS, so these complications can be prevented or treated as early as possible.
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Affiliation(s)
- I Caroline van Nieuwpoort
- 1Department of Internal Medicine, Section Endocrinology, VU University Medical Center and Amsterdam Neuroscience, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Jos W R Twisk
- 2Department of Clinical Epidemiology and Biostatistics and EMGO Institute, VU University Medical Center and Institute of Health Sciences, VU University, Amsterdam, The Netherlands
| | - Leopold M G Curfs
- 3Department of Clinical Genetics, Maastricht University Medical Center, Maastricht, The Netherlands
| | - Paul Lips
- 1Department of Internal Medicine, Section Endocrinology, VU University Medical Center and Amsterdam Neuroscience, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
| | - Madeleine L Drent
- 1Department of Internal Medicine, Section Endocrinology, VU University Medical Center and Amsterdam Neuroscience, De Boelelaan 1117, 1081 HV Amsterdam, The Netherlands
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Yang A, Kim J, Cho SY, Jin DK. Prevalence and risk factors for type 2 diabetes mellitus with Prader-Willi syndrome: a single center experience. Orphanet J Rare Dis 2017; 12:146. [PMID: 28854950 PMCID: PMC5577752 DOI: 10.1186/s13023-017-0702-5] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Accepted: 08/23/2017] [Indexed: 03/14/2023] Open
Abstract
BACKGROUND Prader-Willi syndrome (PWS) is often related to severe obesity and type-2 diabetes mellitus (T2DM). However, few studies, and none in Korea, have examined prevalence of T2DM and other variables in PWS. The aim of this study was to identify the prevalence and associated risk factors for T2DM in Korean patients with PWS. METHODS We performed a retrospective cohort study of the 84 PWS patients aged 10 or over (10.3-35.8 years of age) diagnosed with PWS at Samsung Medical Center from 1994 to 2016. We estimated occurrence of T2DM according to age (10-18 years versus >18 years), body mass index (BMI), genotype, history of growth hormone therapy, homeostasis model of assessment-insulin resistance (HOMA-IR), and the presence of dyslipidemia, hypogonadism, or central precocious puberty. Additionally, we investigated cutoff values of risk factors for development of T2DM. RESULTS Twenty-nine of a total 211 patients, diagnosed with PWS over the study period, were diagnosed as having T2DM (13.7%, mean age 15.9 ± 3.6 years). In the >18 years group, obesity, HOMA-IR, and presence of dyslipidemia, hypogonadism, or central precocious puberty were associated with the occurrence of T2DM in univariate analysis. In multivariate logistic regression analysis, only obesity (p = 0.001) and HOMA-IR (p < 0.001) were significant predictive factors for T2DM. Based on the receiver operating a characteristic curve analysis, the cutoff values of HOMA-IR and BMI for predicting T2DM were >2.7 and >28.49 kg/m2, respectively. Of the 29 patients, seven had ≥1 microvascular complication, with non-proliferative diabetic retinopathy in 6 of 7 cases. Advanced age and HOMA-IR were positively correlated with diabetic microvascular complications (p < 0.05, Spearman correlation coefficient 0.393 and 0.434, respectively). CONCLUSIONS The prevalence of diabetes in Korean PWS was similar to that in previous results. BMI and HOMA-IR were strong predictive factors for the development of T2DM in PWS. We specifically suggest the regular monitoring of glucose homeostasis parameters through a detailed settlement of ethnically specific cutoff values for BMI and HOMA-IR in PWS to prevent progression of T2DM and diabetic microvascular complications.
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Affiliation(s)
- Aram Yang
- Department of Pediatics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Jinsup Kim
- Department of Pediatics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea
| | - Sung Yoon Cho
- Department of Pediatics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea.
| | - Dong-Kyu Jin
- Department of Pediatics, Samsung Medical Center, Sungkyunkwan University School of Medicine, 81 Irwon-ro, Gangnam-gu, Seoul, 06351, South Korea.
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Golding DM, Rees DJ, Davies JR, Relkovic D, Furby HV, Guschina IA, Hopkins AL, Davies JS, Resnick JL, Isles AR, Wells T. Paradoxical leanness in the imprinting-centre deletion mouse model for Prader-Willi syndrome. J Endocrinol 2017; 232:123-135. [PMID: 27799465 PMCID: PMC5118940 DOI: 10.1530/joe-16-0367] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/17/2016] [Accepted: 10/31/2016] [Indexed: 01/09/2023]
Abstract
Prader-Willi syndrome (PWS), a neurodevelopmental disorder caused by loss of paternal gene expression from 15q11-q13, is characterised by growth retardation, hyperphagia and obesity. However, as single gene mutation mouse models for this condition display an incomplete spectrum of the PWS phenotype, we have characterised the metabolic impairment in a mouse model for 'full' PWS, in which deletion of the imprinting centre (IC) abolishes paternal gene expression from the entire PWS cluster. We show that PWS-ICdel mice displayed postnatal growth retardation, with reduced body weight, hyperghrelinaemia and marked abdominal leanness; proportionate retroperitoneal, epididymal/omental and inguinal white adipose tissue (WAT) weights being reduced by 82%, 84% and 67%, respectively. PWS-ICdel mice also displayed a 48% reduction in proportionate interscapular brown adipose tissue (isBAT) weight with significant 'beiging' of abdominal WAT, and a 2°C increase in interscapular surface body temperature. Maintenance of PWS-ICdel mice under thermoneutral conditions (30°C) suppressed the thermogenic activity in PWS-ICdel males, but failed to elevate the abdominal WAT weight, possibly due to a normalisation of caloric intake. Interestingly, PWS-ICdel mice also showed exaggerated food hoarding behaviour with standard and high-fat diets, but despite becoming hyperphagic when switched to a high-fat diet, PWS-ICdel mice failed to gain weight. This evidence indicates that, unlike humans with PWS, loss of paternal gene expression from the PWS cluster in mice results in abdominal leanness. Although reduced subcutaneous insulation may lead to exaggerated heat loss and thermogenesis, abdominal leanness is likely to arise from a reduced lipid storage capacity rather than increased energy utilisation in BAT.
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Affiliation(s)
| | - Daniel J Rees
- Institute of Life SciencesCollege of Medicine, Swansea University, Swansea, UK
| | - Jennifer R Davies
- Behavioural Genetics GroupMRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Schools of Medicine & Psychology, Cardiff University, Cardiff, UK
| | - Dinko Relkovic
- Behavioural Genetics GroupMRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Schools of Medicine & Psychology, Cardiff University, Cardiff, UK
| | - Hannah V Furby
- Behavioural Genetics GroupMRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Schools of Medicine & Psychology, Cardiff University, Cardiff, UK
| | | | | | - Jeffrey S Davies
- Institute of Life SciencesCollege of Medicine, Swansea University, Swansea, UK
| | - James L Resnick
- Center for Mammalian GeneticsUniversity of Florida, College of Medicine, Gainesville, Florida, USA
| | - Anthony R Isles
- Behavioural Genetics GroupMRC Centre for Neuropsychiatric Genetics and Genomics, Neuroscience and Mental Health Research Institute, Schools of Medicine & Psychology, Cardiff University, Cardiff, UK
| | - Timothy Wells
- School of BiosciencesCardiff University, Cardiff, UK
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Kamaludin AA, Smolarchuk C, Bischof JM, Eggert R, Greer JJ, Ren J, Lee JJ, Yokota T, Berry FB, Wevrick R. Muscle dysfunction caused by loss of Magel2 in a mouse model of Prader-Willi and Schaaf-Yang syndromes. Hum Mol Genet 2016; 25:3798-3809. [PMID: 27436578 DOI: 10.1093/hmg/ddw225] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 05/31/2016] [Accepted: 07/07/2016] [Indexed: 01/04/2023] Open
Abstract
Prader-Willi syndrome is characterized by severe hypotonia in infancy, with decreased lean mass and increased fat mass in childhood followed by severe hyperphagia and consequent obesity. Scoliosis and other orthopaedic manifestations of hypotonia are common in children with Prader-Willi syndrome and cause significant morbidity. The relationships among hypotonia, reduced muscle mass and scoliosis have been difficult to establish. Inactivating mutations in one Prader-Willi syndrome candidate gene, MAGEL2, cause a Prader-Willi-like syndrome called Schaaf-Yang syndrome, highlighting the importance of loss of MAGEL2 in Prader-Willi syndrome phenotypes. Gene-targeted mice lacking Magel2 have excess fat and decreased muscle, recapitulating altered body composition in Prader-Willi syndrome. We now demonstrate that Magel2 is expressed in the developing musculoskeletal system, and that loss of Magel2 causes muscle-related phenotypes in mice consistent with atrophy caused by altered autophagy. Magel2-null mice serve as a preclinical model for therapies targeting muscle structure and function in children lacking MAGEL2 diagnosed with Prader-Willi or Schaaf-Yang syndrome.
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Affiliation(s)
| | | | | | | | - John J Greer
- Department of Physiology, University of Alberta, Edmonton, AB, Canada
| | - Jun Ren
- Department of Physiology, University of Alberta, Edmonton, AB, Canada
| | | | | | - Fred B Berry
- Department of Medical Genetics
- Department of Surgery and
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Johnson L, Manzardo AM, Miller JL, Driscoll DJ, Butler MG. Elevated plasma oxytocin levels in children with Prader-Willi syndrome compared with healthy unrelated siblings. Am J Med Genet A 2015; 170:594-601. [PMID: 26615966 DOI: 10.1002/ajmg.a.37488] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/22/2015] [Accepted: 11/05/2015] [Indexed: 11/07/2022]
Abstract
Prader-Willi syndrome (PWS) is a rare genetic disorder associated with distinct abnormal behaviors including hyperphagia, profound social deficits, and obsessive-compulsive tendencies. PWS males showed reduced oxytocin receptor (OTR) gene expression and density in the hypothalamic paraventricular nucleus that may play a role in PWS psychopathology. Oxytocin is an anorexigenic neuropeptide similar to vasopressin that is associated with social cognition and obsessive-compulsive behavior. To evaluate oxytocin biology in PWS, we examined overnight fasting plasma oxytocin levels in 23 children with PWS (mean ± SD age: 8.2 ± 2.0 year) having genetic confirmation and 18 age matched healthy unrelated siblings without PWS (mean ± SD age: 8.2 ± 2.3 year) and a similar gender ratio under the same clinical assessments, specimen processing and laboratory conditions. Multiplex immune assays were carried out using the Milliplex Human Neuropeptide Magnetic panel and the Luminex system. Natural log-transformed oxytocin levels were analyzed using general linear model adjusting for diagnosis, gender, age and body mass index (BMI). Oxytocin plasma levels were significantly elevated in children with PWS (168 ± 121 pg/ml) compared with unrelated and unaffected siblings without the diagnosis of PWS (64.8 ± 83.8 pg/ml, F = 8.8, P < 0.01) and the diagnosis of PWS predicted oxytocin level (F = 9.5, P < 0.003) in controlled regression analysis with an overall model fit R(2) = 0.33 (P < 0.01). The symptoms of hyperphagia, anxiety and repetitive behaviors classically seen in PWS may be related to the disruption of oxytocin responsivity or feedback in the hypothalamic paraventricular nucleus possibly influencing vasopressin signaling. Further study is needed to characterize oxytocin function in PWS.
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Affiliation(s)
- Lisa Johnson
- Departments of Psychiatry and Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, Kansas
| | - Ann M Manzardo
- Departments of Psychiatry and Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, Kansas
| | - Jennifer L Miller
- Department of Pediatrics, University of Florida Medical Center, Gainesville, Florida
| | - Daniel J Driscoll
- Department of Pediatrics, University of Florida Medical Center, Gainesville, Florida
| | - Merlin G Butler
- Departments of Psychiatry and Behavioral Sciences and Pediatrics, University of Kansas Medical Center, Kansas City, Kansas
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