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Chen J, Xiao WC, Zhao JJ, Shan R, Heitkamp M, Zhang XR, Liu Z. Gene variants and the response to childhood obesity interventions: A systematic review and meta-analysis. Clin Nutr 2024; 43:163-175. [PMID: 38052139 DOI: 10.1016/j.clnu.2023.11.031] [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: 07/10/2023] [Revised: 11/19/2023] [Accepted: 11/23/2023] [Indexed: 12/07/2023]
Abstract
BACKGROUND Multiple lifestyle-based childhood obesity interventions have been conducted to address childhood obesity, but individual's response to the universal intervention approach varied greatly. Whether gene variants related to children and adolescents' varied responses to obesity interventions remained unclear. AIMS To determine the associations of gene variants with the changes in obesity- and metabolism-related indicators after obesity interventions in children and adolescents. METHODS Ten databases and registers (including grey literature) were searched. The lifestyle-based obesity interventions in children and adolescents (≤18 years) that reported the changes in obesity- (body mass index (BMI), BMI Z-score, waist circumference (WC), waist-to-hip ratio (WHR), etc) and metabolism-related (glucose, cholesterol, etc) indicators by genotype after interventions were included. Our primary outcome was the mean difference of the changes in BMI Z-score by genotype after interventions, and secondary outcomes were changes in the remaining obesity- and metabolism-related indicators after interventions. We used the random-effects model to synthesize the results. RESULTS This review included 50 studies (15,354 children and adolescents with overweight/obesity) covering 102 genes and 174 single nucleotide polymorphisms (SNPs). Approximately three-quarters of SNPs showed no evidence of association with the changes in obesity- or metabolic-related indicators after interventions. One quarter of SNPs were minorly associated with the changes in the BMI Z-score (median effect size: 0.001) with little clinical significance. Only 6 (12 %) studies focused on the accumulated effect of multiple gene variants. CONCLUSIONS Gene variants that have been explored appear to play a minor role in lifestyle-based obesity interventions in children and adolescents. More high-quality studies based on the design of randomized controlled trials are needed to examine the accumulated effect of multiple gene variants in childhood obesity interventions. PROSPERO REGISTRY NUMBER This systematic review and meta-analysis was registered at PROSPERO as CRD42022312177.
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Affiliation(s)
- Jing Chen
- Department of Maternal and Child Health, School of Public Health, Peking University, Beijing, China
| | - Wu-Cai Xiao
- Department of Maternal and Child Health, School of Public Health, Peking University, Beijing, China
| | - Jia-Jun Zhao
- Department of Nutrition, School of Medicine, Shanghai Jiao Tong University, Shanghai, China
| | - Rui Shan
- Department of Maternal and Child Health, School of Public Health, Peking University, Beijing, China
| | - Melanie Heitkamp
- Department of Prevention and Sports Medicine, University Hospital "Klinikum rechts der Isar," Technical University of Munich, Georg-Brauchle-Ring 56, 80992 Munich, Germany
| | - Xiao-Rui Zhang
- Department of Pediatrics, Peking University People's Hospital, Beijing, China
| | - Zheng Liu
- Department of Maternal and Child Health, School of Public Health, Peking University, Beijing, China.
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Zhang Y, Li S, Nie H, Wang X, Li X, Wen J, Li M, Song Y. The rs17782313 polymorphism near MC4R gene confers a high risk of obesity and hyperglycemia, while PGC1α rs8192678 polymorphism is weakly correlated with glucometabolic disorder: a systematic review and meta-analysis. Front Endocrinol (Lausanne) 2023; 14:1210455. [PMID: 37621650 PMCID: PMC10445758 DOI: 10.3389/fendo.2023.1210455] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/22/2023] [Accepted: 07/25/2023] [Indexed: 08/26/2023] Open
Abstract
Background The relationships of the rs17782313 polymorphism near melanocortin 4 receptor gene (MC4R) and the rs8192678 polymorphism in peroxisome proliferator-activated receptor gamma coactivator 1 alpha gene (PGC1α) with metabolic abnormalities have been explored in many populations around the world, but the findings were not all consistent and sometimes even a bit contradictory. Methods Electronic databases including Medline, Scopus, Embase, Web of Science, CNKI and Google Scholar were checked for studies that met the inclusion criteria. Data were carefully extracted from eligible studies. Standardized mean differences (SMDs) were calculated by using a random-effects model to examine the differences in the indexes of obesity, glucometabolic disorder and dyslipidemia between the genotypes of the rs17782313 and rs8192678 polymorphisms. Cochran's Q-statistic test and Begg's test were employed to identify heterogeneity among studies and publication bias, respectively. Results Fifty studies (58,716 subjects) and 51 studies (18,660 subjects) were respectively included in the pooled meta-analyses for the rs17782313 and rs8192678 polymorphisms. The C-allele carriers of the rs17782313 polymorphism had a higher average level of body mass index (SMD = 0.21 kg/m2, 95% confidence interval [95% CI] = 0.12 to 0.29 kg/m2, p < 0.001), waist circumference (SMD = 0.14 cm, 95% CI = 0.06 to 0.23 cm, p < 0.001) and blood glucose (SMD = 0.09 mg/dL, 95% CI = 0.02 to 0.16 mg/dL, p = 0.01) than the TT homozygotes. Regarding the rs8192678 polymorphism, no significant associations with the indexes of obesity, glucometabolic disorder and dyslipidemia were detected. However, significant correlations between the rs8192678 polymorphism and multiple glucometabolic indexes were observed in subgroup analyses stratified by sex, age, ethnicity and health status. Conclusion The meta-analysis demonstrates that the C allele of the MC4R rs17782313 polymorphism confers a higher risk of obesity and hyperglycemia, and the PGC1α rs8192678 polymorphism is weakly correlated with glucometabolic disorder. These findings may partly explain the relationships between these variants and diabetes as well as cardiovascular disease. Systematic review registration https://www.crd.york.ac.uk/prospero/, identifier CRD42022373543.
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Affiliation(s)
- Youjin Zhang
- Central Laboratory, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Shiyun Li
- Department of Endocrinology, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Haiyan Nie
- Clinical Medical College of Chengdu University, Chengdu, Sichuan, China
| | - Xue Wang
- Central Laboratory, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Xuanxuan Li
- Clinical Medical College of Chengdu University, Chengdu, Sichuan, China
| | - Jinhui Wen
- Department of Endocrinology, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
| | - Mengxi Li
- Clinical Medical College of Chengdu University, Chengdu, Sichuan, China
| | - Yongyan Song
- Central Laboratory, Clinical Medical College and Affiliated Hospital of Chengdu University, Chengdu, Sichuan, China
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Vourdoumpa A, Paltoglou G, Charmandari E. The Genetic Basis of Childhood Obesity: A Systematic Review. Nutrients 2023; 15:1416. [PMID: 36986146 PMCID: PMC10058966 DOI: 10.3390/nu15061416] [Citation(s) in RCA: 8] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 03/05/2023] [Accepted: 03/10/2023] [Indexed: 03/17/2023] Open
Abstract
Overweight and obesity in childhood and adolescence represents one of the most challenging public health problems of our century owing to its epidemic proportions and the associated significant morbidity, mortality, and increase in public health costs. The pathogenesis of polygenic obesity is multifactorial and is due to the interaction among genetic, epigenetic, and environmental factors. More than 1100 independent genetic loci associated with obesity traits have been currently identified, and there is great interest in the decoding of their biological functions and the gene-environment interaction. The present study aimed to systematically review the scientific evidence and to explore the relation of single-nucleotide polymorphisms (SNPs) and copy number variants (CNVs) with changes in body mass index (BMI) and other measures of body composition in children and adolescents with obesity, as well as their response to lifestyle interventions. Twenty-seven studies were included in the qualitative synthesis, which consisted of 7928 overweight/obese children and adolescents at different stages of pubertal development who underwent multidisciplinary management. The effect of polymorphisms in 92 different genes was assessed and revealed SNPs in 24 genetic loci significantly associated with BMI and/or body composition change, which contribute to the complex metabolic imbalance of obesity, including the regulation of appetite and energy balance, the homeostasis of glucose, lipid, and adipose tissue, as well as their interactions. The decoding of the genetic and molecular/cellular pathophysiology of obesity and the gene-environment interactions, alongside with the individual genotype, will enable us to design targeted and personalized preventive and management interventions for obesity early in life.
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Affiliation(s)
- Aikaterini Vourdoumpa
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
| | - George Paltoglou
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
| | - Evangelia Charmandari
- Division of Endocrinology, Metabolism and Diabetes, First Department of Pediatrics, National and Kapodistrian University of Athens Medical School, ‘Aghia Sophia’ Children’s Hospital, 11527 Athens, Greece
- Division of Endocrinology and Metabolism, Center for Clinical, Experimental Surgery and Translational Research, Biomedical Research Foundation of the Academy of Athens, 11527 Athens, Greece
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Dastgheib SA, Bahrami R, Setayesh S, Salari S, Mirjalili SR, Noorishadkam M, Sadeghizadeh-Yazdi J, Akbarian E, Neamatzadeh H. Evidence from a meta-analysis for association of MC4R rs17782313 and FTO rs9939609 polymorphisms with susceptibility to obesity in children. Diabetes Metab Syndr 2021; 15:102234. [PMID: 34364300 DOI: 10.1016/j.dsx.2021.102234] [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: 06/27/2021] [Revised: 07/24/2021] [Accepted: 07/26/2021] [Indexed: 12/19/2022]
Abstract
BACKGROUND AND AIM The aim of this study was to evaluate the association of MC4R rs17782313 and FTO rs9939609 polymorphisms with childhood obesity. METHODS A universal search was performed up to May 2021. RESULTS A total of 31 studies including 13 studies with 9565 cases and 11956 controls on MC4R rs17782313 and 18 studies with 4789 cases and 15918 controls on FTO rs9939609 were selected. CONCLUSIONS Pooled data showed that FTO rs9930506 and MC4R rs17782313 polymorphisms were significantly associated with obesity in children. Stratified analyses revealed that these genetic variants were associated with childhood obesity in Caucasian and Asian children.
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Affiliation(s)
- Seyed Alireza Dastgheib
- Department of Medical Genetics, School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Reza Bahrami
- Neonatal Research Center, Shiraz University of Medical Sciences, Shiraz, Iran.
| | - Sepideh Setayesh
- School of Medicine, Shiraz University of Medical Sciences, Shiraz, Iran
| | - Seyedali Salari
- Department of Biology, Science and Arts University, Yazd, Iran
| | - Seyed Reza Mirjalili
- Mother and Newborn Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Mahmood Noorishadkam
- Mother and Newborn Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Jalal Sadeghizadeh-Yazdi
- Department of Food Science and Technology, School of Public Health, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Elahe Akbarian
- Children Growth Disorder Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
| | - Hossein Neamatzadeh
- Mother and Newborn Health Research Center, Shahid Sadoughi University of Medical Sciences, Yazd, Iran; Department of Medical Genetics, Shahid Sadoughi University of Medical Sciences, Yazd, Iran
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Inandiklioğlu N, Yaşar A. Association between rs1421085 and rs9939609 Polymorphisms of Fat Mass and Obesity-Associated Gene with High-Density Lipoprotein Cholesterol and Triglyceride in Obese Turkish Children and Adolescents. J Pediatr Genet 2021; 10:9-15. [PMID: 33552632 DOI: 10.1055/s-0040-1713154] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Accepted: 05/04/2020] [Indexed: 10/24/2022]
Abstract
Several studies have shown that rs9939609 and rs1421085 in fat mass and obesity-associated ( FTO ) gene rs17782313 and rs12970134 in melanocortin-4 receptor ( MC4R ) gene influence obesity. In the present study, we aimed to determine association between rs9939609, rs1421085, rs17782313, and rs12970134 polymorphism, and their relation with body mass index (BMI), glucose, insulin, homeostasis model assessment of insulin resistance (HOMA-IR) and lipid values in obese children. We included 100 newly diagnosed obese children and 100 healthy children. The rs1421085 (CC/CT) ( p = 0.019) and rs9939609 (AA/AT) ( p = 0.002) polymorphism regions were higher in the obese group. Additionally, we found that both the rs1421085 (CC/CT) and rs9939609 (AA/AT) polymorphism associated with high-density lipoprotein cholesterol ( p = 0.011 and p = 0.003) and triglycerides ( p = 0.01 and p = 0.004) level, respectively. Further, the rs9939609 and rs1421085 variants of FTO gene associated with HDL-cholesterol and triglycerides levels in obese children; however, updated studies with a large sample size are required to establish strong links with genetic variants and risk factors in childhood obesity.
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Affiliation(s)
- Nihal Inandiklioğlu
- Department of Medical Biology, Faculty of Medicine, Bozok University, Yozgat, Turkey
| | - Adem Yaşar
- Department of Child Health and Disease, Faculty of Medicine, Bozok University, Yozgat, Turkey
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Heitkamp M, Siegrist M, Molnos S, Brandmaier S, Wahl S, Langhof H, Grallert H, Halle M. Obesity Genes and Weight Loss During Lifestyle Intervention in Children With Obesity. JAMA Pediatr 2021; 175:e205142. [PMID: 33315090 PMCID: PMC7737153 DOI: 10.1001/jamapediatrics.2020.5142] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
IMPORTANCE Genome-wide association studies have identified genetic loci influencing obesity risk in children. However, the importance of these loci in the associations with weight reduction through lifestyle interventions has not been investigated in large intervention trials. OBJECTIVE To evaluate the associations between various obesity susceptibility loci and changes in body weight in children during an in-hospital, lifestyle intervention program. DESIGN, SETTING, AND PARTICIPANTS Long-term Effects of Lifestyle Intervention in Obesity and Genetic Influence in Children (LOGIC), an interventional prospective cohort study, enrolled 1429 children with overweight or obesity to participate in an in-hospital lifestyle intervention program. Genotyping of 56 validated obesity single-nucleotide variants (SNVs) was performed, and the associations between the SNVs and body weight reduction during the intervention were evaluated using linear mixed-effects models for each SNV. The LOGIC study was conducted from January 6, 2006, to October 19, 2013; data analysis was performed from July 15, 2015, to November 6, 2016. EXPOSURES A 4- to 6-week standardized in-hospital lifestyle intervention program (daily physical activity, calorie-restricted diet, and behavioral therapy). MAIN OUTCOMES AND MEASURES The association between 56 obesity-relevant SNVs and changes in body weight and body mass index. RESULTS Of 1429 individuals enrolled in the LOGIC Study, 1198 individuals (mean [SD] age, 14.0 [2.2] years; 670 [56%] girls) were genotyped. A mean (SD) decrease was noted in body weight of -8.7 (3.6) kg (95% CI, -15.7 to -1.8 kg), and body mass index (calculated as weight in kilograms divided by height in meters squared) decreased by -3.3 (1.1) (95% CI, -5.4 to -1.1) (both P < .05). Five of 56 obesity SNVs were statistically significantly associated with a reduction of body weight or body mass index (all P < 8.93 × 10-4 corresponding to Bonferroni correction for 56 tests). Compared with homozygous participants without the risk allele, homozygous carriers of the rs7164727 (LOC100287559: 0.42 kg; 95% CI, 0.31-0.53 kg, P = 4.00 × 10-4) and rs12940622 (RPTOR: 0.35 kg; 95% CI, 0.18-0.52 kg; P = 1.86 × 10-5) risk alleles had a lower reduction of body weight, whereas carriers of the rs13201877 (IFNGR1: 0.65 kg; 95% CI, 0.51-0.79 kg; P = 2.39 × 10-5), rs10733682 (LMX1B: 0.45 kg; 95% CI, 0.27-0.63 kg; P = 6.37 × 10-4), and rs2836754 (ETS2: 0.56 kg; 95% CI, 0.38-0.74 kg; P = 1.51 × 10-4) risk alleles were associated with a greater reduction of body weight after adjustment for age and sex. CONCLUSIONS AND RELEVANCE Genes appear to play a minor role in weight reduction by lifestyle in children with overweight or obesity. The findings suggest that environmental, social, and behavioral factors are more important to consider in obesity treatment strategies.
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Affiliation(s)
- Melanie Heitkamp
- Department of Prevention and Sports Medicine, Centre for Sports Cardiology, University Hospital “Klinikum rechts der Isar,” Technical University of Munich, Munich, Germany
| | - Monika Siegrist
- Department of Prevention and Sports Medicine, Centre for Sports Cardiology, University Hospital “Klinikum rechts der Isar,” Technical University of Munich, Munich, Germany
| | - Sophie Molnos
- Research Unit of Molecular Epidemiology, Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany,German Center for Diabetes Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Stefan Brandmaier
- Research Unit of Molecular Epidemiology, Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany,German Center for Diabetes Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Simone Wahl
- Research Unit of Molecular Epidemiology, Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany,German Center for Diabetes Research, Helmholtz Zentrum München, Neuherberg, Germany,Now with Roche Diagnostics, Bavaria, Germany
| | - Helmut Langhof
- Rehabilitation Clinic “Klinik Schönsicht,” Berchtesgaden, Germany
| | - Harald Grallert
- Research Unit of Molecular Epidemiology, Institute of Epidemiology, Helmholtz Zentrum München, Neuherberg, Germany,German Center for Diabetes Research, Helmholtz Zentrum München, Neuherberg, Germany
| | - Martin Halle
- Department of Prevention and Sports Medicine, Centre for Sports Cardiology, University Hospital “Klinikum rechts der Isar,” Technical University of Munich, Munich, Germany,German Center for Cardiovascular Research, partner site Munich Heart Alliance, Munich, Germany
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Dietary patterns interact with the variations of 18q21.23 rs17782313 locus on regulation of hypothalamic-pituitary axis hormones and cardio-metabolic risk factors in obesity. Eat Weight Disord 2020; 25:1447-1459. [PMID: 32016782 DOI: 10.1007/s40519-020-00855-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2019] [Accepted: 01/21/2020] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Evidence shows the role of polymorphisms in rs17782313 MC4R gene with increased risk of obesity in Asians adult. In the current report, we investigated the interaction between rs17782313 MC4R gene and major dietary patterns on α-melanocyte stimulating hormone (α-MSH), Agouti-related peptide (AgRP), serum lipids and blood pressure among obese individuals. METHODS This cross-sectional study was performed in 288 obese adults between 20 and 50 years of age. Anthropometric measurements and biochemical assays were conducted with standard methods. To evaluate appetite, the Visual Analogue Scale (VAS) was used. Dietary patterns were obtained by principal component analysis (PCA). Genotyping of rs17782313 was assessed by restriction fragment length polymorphism (PCR-RFLP) method. RESULTS Three major dietary patterns were extracted: Prudent Dietary Pattern (PDP), Legume Dietary Pattern (LDP) and Mixed Dietary Pattern (MDP). Higher PDP score was associated with reduced SBP and insulin concentration while highest MDP score was associated with lower TG concentration (P < 0.05). Significant interactions were observed between higher adherence to PDP and rs17782313 CC genotype on increased SBP (PInteraction = 0.04), serum insulin (PInteraction = 0.05) and AgRP (PInteraction = 0.03) and also between higher adherence to MDP and CC genotype of rs17782313 on reduced serum TG (P = 0.03). CONCLUSIONS The findings of the current study showed that being on CC genotype of rs17782313 polymorphism made obese individuals more prone to have higher SBP, insulin and AgRP even in highest adherence to PDP. However, adherence to MDP could attenuate the risky effects of being on CC genotype of rs17782313 by reducing serum TG concentrations. LEVEL OF EVIDENCE Level V, cross-sectional descriptive study.
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8
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Wei BL, Yin RX, Liu CX, Deng GX, Guan YZ, Zheng PF. The MC4R SNPs, their haplotypes and gene-environment interactions on the risk of obesity. Mol Med 2020; 26:77. [PMID: 32770936 PMCID: PMC7414557 DOI: 10.1186/s10020-020-00202-1] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2020] [Accepted: 07/21/2020] [Indexed: 01/08/2023] Open
Abstract
Background Little is known about the correlation between the melanocortin 4 receptor gene (MC4R) single nucleotide polymorphisms (SNPs) and the risk of obesity. This research sought to test the MC4R rs17782313, rs476828 and rs12970134 SNPs, their haplotypes and gene-environment interactions on the risk of obesity in the Maonan ethnic group, an isolated minority in China. Methods A case-control study comprised of 1836 participants (obesity group, 858; and control group, 978) was conducted. Genotypes of the three SNPs were determined by the next-generation sequencing (NGS) technology. Results The genotypic frequencies of the three SNPs were different between the obesity and control groups (P < 0.05 for all). The minor allelic frequency of the MC4R rs17782313C, rs476828C and rs12970134A was higher in obesity than in control groups (13.8% vs. 8.3%, P < 0.001, 17.1% vs. 10.9%, P < 0.001; and 15.5% vs. 11.5%, P < 0.001; respectively). Additionally, the dominant model of rs17782313 and rs476828 SNPs revealed an increased morbidity function on the risk of obesity (P < 0.05). A correlation between SNP-environment and the risk of obesity was also observed. The rs17782313C-rs476828C-rs12970134A haplotype was associated with high risk of obesity (OR = 1.796, 95% CI = 1.447–2.229), whereas the rs17782313T-rs476828T-rs12970134G and rs17782313T-rs476828T-rs12970134A haplotypes were associated with low risk of obesity (OR = 0.699, 95% CI = 0.586–0.834 and OR = 0.620, 95% CI = 0.416–0.925; respectively). The interactions between haplotype and waist circumference on the risk of obesity were also noted. Conclusions We discovered that the MC4R rs17782313, rs476828 and rs12970134 SNPs and their haplotypes were associated with the risk of obesity in the Chinese Maonan population.
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Affiliation(s)
- Bi-Liu Wei
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China
| | - Rui-Xing Yin
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China. .,Guangxi Key Laboratory Base of Precision Medicine in Cardio-cerebrovascular Disease Control and Prevention, Nanning, Guangxi, 530021, People's Republic of China. .,Guangxi Clinical Research Center for Cardio-cerebrovascular Diseases, Nanning, Guangxi, 530021, People's Republic of China.
| | - Chun-Xiao Liu
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China
| | - Guo-Xiong Deng
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China
| | - Yao-Zong Guan
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China
| | - Peng-Fei Zheng
- Department of Cardiology, Institute of Cardiovascular Diseases, the First Affiliated Hospital, Guangxi Medical University, 6 Shuangyong Road, Nanning, Guangxi, 530021, People's Republic of China
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9
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Salazar-Tortosa DF, Pascual-Gamarra JM, Labayen I, Rupérez AI, Censi L, Béghin L, Michels N, Gonzalez-Gross M, Manios Y, Lambrinou CP, Marcos A, Moreno LA, Meirhaeghe A, Castillo MJ, Ruiz JR. Association between lipoprotein lipase gene polymorphisms and cardiovascular disease risk factors in European adolescents: The Healthy Lifestyle in Europe by Nutrition in Adolescence study. Pediatr Diabetes 2020; 21:747-757. [PMID: 32333632 DOI: 10.1111/pedi.13035] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2019] [Revised: 03/15/2020] [Accepted: 04/22/2020] [Indexed: 12/26/2022] Open
Abstract
OBJECTIVES To examine the association of lipoprotein lipase (LPL) polymorphisms with cardiovascular disease (CVD) risk factors in European adolescents, along with the influence of physical activity on these associations. METHODS A total of 13 LPL polymorphisms were genotyped in 1.057 European adolescents (12-18 years old) from the Healthy Lifestyle in Europe by Nutrition in Adolescence Cross-Sectional Study. Serum lipids, glucose, insulin, and leptin (LEP) levels were measured and a CVD risk score was computed. We also measured body weight and height, waist and hip circumferences, and triceps and subscapular skinfold thickness. Physical activity was objectively measured by accelerometry for 7 days. RESULTS The rs1534649, rs258, rs320, and rs328 polymorphisms were associated with several CVD risk factors (ie, body mass index, triglycerides [TG], LEP, and cholesterol/high-density lipoprotein [HDL], low-density lipoprotein [LDL]/HDL, TG/HDL ratios). TG and TG/HDL were associated with haplotype blocks 3 (rs282, rs285 polymorphisms) and 4 (rs3126, rs320, rs328, rs10099160 polymorphisms), being the latter also associated with the CVD risk score. Physical activity modulated the association of adiposity with rs1534649 and rs258 polymorphisms. CONCLUSIONS Polymorphisms rs1534649, rs258, rs320 and rs328, and two haplotypes of LPL were significantly associated with CVD risk factors in European adolescents. Higher levels of moderate to vigorous physical activity may attenuate the effects of rs1534649 and rs258 polymorphisms on adiposity.
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Affiliation(s)
- Diego F Salazar-Tortosa
- PROFITH 'PROmoting FITness and Health through physical activity' research group, Sport and Health University Research Institute (iMUDS), University of Granada, Granada, Spain.,Department of Ecology and Evolutionary Biology, University of Arizona, Tucson, Arizona, USA.,Department of Ecology, Faculty of Sciences, University of Granada, Spain
| | - Jose M Pascual-Gamarra
- PROFITH 'PROmoting FITness and Health through physical activity' research group, Sport and Health University Research Institute (iMUDS), University of Granada, Granada, Spain.,Department of Medical Physiology, Faculty of Medicine, University of Granada, Spain
| | - Idoia Labayen
- Institute for Innovation & Sustainable Development in Food Chain (IS-FOOD), Department of Health Sciences, Navarra's Health Research Institute (IdiSNA), Public University of Navarra, Pamplona, Spain
| | - Azahara I Rupérez
- Growth, Exercise, Nutrition and Development (GENUD) Research Group, University of Zaragoza, Zaragoza, Spain.,Instituto Agroalimentario de Aragón (IA2), Zaragoza, Spain.,Instituto de Investigación Sanitaria Aragón (IIS Aragón), Zaragoza, Spain
| | - Laura Censi
- Council for Agricultural Research and Economics (CREA), Research Centre for Food and Nutrition, Rome, Italy
| | - Laurent Béghin
- Univ. Lille, Inserm, CHU Lille, CIC 1403 - Clinique Investigation Center and U1286 -INFINITE - Institute for Translational Research in Inflammation, Lille, France
| | - Nathalie Michels
- Department of Public Health and Primary Care, Ghent University, Belgium
| | - Marcela Gonzalez-Gross
- Department of Health and Human Performance, Universidad Politécnica de Madrid, Madrid, Spain
| | - Yannis Manios
- Department of Nutrition and Dietetics, Harokopio University of Athens, Greece
| | | | - Ascension Marcos
- Spanish National Research Council (CSIC), Immunonutrition Group, Institute of Food Science, Technology and Nutrition (ICTAN), Madrid, Spain
| | - Luis A Moreno
- Growth, Exercise, Nutrition and Development (GENUD) Research Group, University of Zaragoza, Zaragoza, Spain.,Instituto Agroalimentario de Aragón (IA2), Zaragoza, Spain.,Instituto de Investigación Sanitaria Aragón (IIS Aragón), Zaragoza, Spain.,Instituto de Salud Carlos, Centro de Investigación Biomédica en Red de Fisiopatología de la Obesidad y Nutrición (CIBERObn), Madrid, Spain.,Instituto de Salud Carlos III, Madrid, Spain.,Faculty of Health Sciences, University of Zaragoza, Zaragoza, 50009, Spain
| | - Aline Meirhaeghe
- Inserm, Institut Pasteur de Lille, University Lille, UMR1167-RID-AGE-Risk factors and molecular determinants of aging-related diseases, Lille, France
| | - Manuel J Castillo
- Department of Medical Physiology, Faculty of Medicine, University of Granada, Spain
| | - Jonatan R Ruiz
- PROFITH 'PROmoting FITness and Health through physical activity' research group, Sport and Health University Research Institute (iMUDS), University of Granada, Granada, Spain.,Department of Physical Education and Sport, Faculty of Sport Sciences, University of Granada, Granada, Spain.,Department of Biosciences and Nutrition at NOVUM, Karolinska Institutet, Huddinge, Sweden
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10
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Yau AMW, McLaughlin J, Maughan RJ, Gilmore W, Ashworth JJ, Evans GH. A Pilot Study Investigating the Influence of Glucagon-Like Peptide-1 Receptor Single Nucleotide Polymorphisms on Gastric Emptying Rate in Caucasian Men. Front Physiol 2018; 9:1331. [PMID: 30319443 PMCID: PMC6167426 DOI: 10.3389/fphys.2018.01331] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 09/04/2018] [Indexed: 01/06/2023] Open
Abstract
Gastric emptying rate in humans is subject to large individual variability, but previous research on the influence of genetics is scarce. Variation in the glucagon-like peptide-1 receptor (GLP1R) gene is a plausible candidate gene to partially explain the high variance. This study aimed to investigate the influence of genetic variation in the GLP1R gene on gastric emptying rate of a glucose solution in humans. Forty eight healthy Caucasian males took part in this investigation. Gastric emptying rate of a 6% glucose solution was assessed using the 13C breath test method and a venous blood sample was obtained from each participant. Participants were genotyped for 27 Tag single nucleotide polymorphisms (SNPs) in the GLP1R locus using Sequenom MassARRAY iPLEX GOLD analysis and MALDI-TOF mass spectrometry. The time at which maximal emptying rate occurred (Tlag) was faster in participants with the CC genotype than in TT and TC genotypes for SNP rs742764: [median (quartiles) CC, 35 (30-36) min vs. TT, 43 (39-46) min, and TC, 41 (39-45) min; P < 0.01]. Tlag was also slower in participants with the AA genotype compared to the TT and TA genotypes for SNP rs2254336: [AA, 43 (39-49) min vs. TT, 36 (34-41) min, and TA, 39 (35-42) min; P < 0.05]. Analysis by phenotype also showed differences in half-emptying time (T12) and Tlag for SNPs rs9283907, rs2268657, and rs2254336. Several neighboring Tag SNPs within the GLP1R gene were found to be associated with gastric emptying rate, and should be further investigated.
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Affiliation(s)
- Adora M W Yau
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom
| | - John McLaughlin
- Division of Diabetes, Endocrinology and Gastroenterology, School of Medical Sciences, The University of Manchester, Manchester, United Kingdom.,Salford Royal Hospitals, Salford, United Kingdom
| | - Ronald J Maughan
- School of Medicine, University of St Andrews, St Andrews, United Kingdom
| | - William Gilmore
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom.,School of Biomedical Sciences, Ulster University, Coleraine, United Kingdom
| | - Jason J Ashworth
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom
| | - Gethin H Evans
- School of Healthcare Science, Manchester Metropolitan University, Manchester, United Kingdom
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11
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Mǎrginean CO, Mǎrginean C, Meliţ LE. New Insights Regarding Genetic Aspects of Childhood Obesity: A Minireview. Front Pediatr 2018; 6:271. [PMID: 30338250 PMCID: PMC6180186 DOI: 10.3389/fped.2018.00271] [Citation(s) in RCA: 42] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Accepted: 09/10/2018] [Indexed: 01/26/2023] Open
Abstract
Introduction: Childhood obesity is occurring at alarming rates in both developed and developing countries. "Obesogenic" environmental factors must be associated with variants of different risk alleles to determine polygenic or common obesity, and their impact depends on different developmental stages.The interaction between obesogenic environment and genetic susceptibility results in the so-called polygenic forms of obesity. In contrast, monogenic and syndromic obesity are not influenced by environmental events. Therefore, this review aimed to underline the roles of some of the most studied genes in the development of monogenic and polygenic obesity in children. Results: Among the most common obesity related genes, we chose the fat mass and obesity-associated (FTO) gene, leptin gene and its receptor, tumor necrosis factor alpha (TNF-α), the melanocortin 4 receptor gene (MC4R), Ectoenzyme nucleotide pyrophosphate phosphodiesterase 1 (ENPP1), and others, such as peroxisome proliferator-activated receptor gamma (PPARG), angiotensin-converting enzyme (ACE), glutathione S-transferase (GST), and interleukin-6 (IL-6) genes. The roles of these genes are complex and interdependent, being linked to different cornerstones in obesity development, such as appetite behavior, control of food intake and energy balance, insulin signaling, lipid and glucose metabolism, metabolic disorders, adipocyte differentiation, and so on. Conclusions: Genetic predisposition is mandatory, but not enough to trigger obesity.Dietary interventions and proper lifestyle changes can prevent obesity development in genetically predisposed children. Further studies are needed to identify the precise role of both genetic and obesogenic factors in the development of childhood obesity in order to design effective preventive methods.
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Affiliation(s)
- Cristina Oana Mǎrginean
- Department of Pediatrics, University of Medicine and Pharmacy Târgu Mureş, Târgu Mureş, Romania
| | - Claudiu Mǎrginean
- Department of Obstetrics and Gynecology, University of Medicine and Pharmacy Târgu Mureş, Târgu Mureş, Romania
| | - Lorena Elena Meliţ
- Department of Pediatrics, University of Medicine and Pharmacy Târgu Mureş, Târgu Mureş, Romania
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12
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Rana S, Rahmani S, Mirza S. MC4R variant rs17782313 and manifestation of obese phenotype in Pakistani females. RSC Adv 2018; 8:16957-16972. [PMID: 35540528 PMCID: PMC9080305 DOI: 10.1039/c8ra00695d] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2018] [Accepted: 04/30/2018] [Indexed: 11/21/2022] Open
Abstract
MC4R represents a key player involved in melanocortin-mediated control of energy balance. Recently identified near MC4R variant rs17782313 (T > C) can serve as a contributing factor for obese phenotype but its association with obesity has never been sought in a sample of the Pakistani population. The role of genetic variants as causal factors varies across populations. Association studies in a specific population can help us to distinguish global from local gene–gene and gene–environment interactions. This is the first study that investigated the association of rs17782313 with obesity and various obesity-linked anthropometric, metabolic, physical, and behavioural traits in Pakistani subjects including 306 OW/OB (overweight and obese) and 300 NW (normal weight) individuals. The comparison of various aforementioned obesity-linked continuous and categorical variables between OW/OB and NW subjects revealed that almost all variables were found significantly aberrant (p < 0.05) in OW/OB subjects as compared to their age- and gender-matched NW controls indicating greater risk of developing various cardio-metabolic disorders. The genotyping of rs17782313 showed significant association of this variant with obesity and obesity-linked anthropometric traits in females suggesting the gender-specific effect of this variant in our population. The minor allele C increased the risk of obesity by 1.55 times (95% CI = 1.1–2.18, p = 0.01) whereas homozygous CC genotype increased the risk by 2.43 times (95% CI = 1.19–4.96, p = 0.015) in females. However, no association of rs17782313 was observed with any of the obesity-linked metabolic, physical, and behavioural traits except random eating timings. In conclusion, the current study significantly contributes to the knowledge of the genetic proneness to obesity in Pakistani females. This could also be helpful for forthcoming meta-analysis studies elucidating which variants are truly associated with the susceptibility to develop an obese phenotype. The current study significantly contributes to the knowledge of the genetic proneness to obesity in Pakistani females and could also be helpful for forthcoming meta-analysis studies.![]()
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Affiliation(s)
- Sobia Rana
- Molecular Biology and Human Genetics Laboratory
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD)
- International Center for Chemical and Biological Sciences (ICCBS)
- University of Karachi
- Karachi-75270
| | - Soma Rahmani
- Molecular Biology and Human Genetics Laboratory
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD)
- International Center for Chemical and Biological Sciences (ICCBS)
- University of Karachi
- Karachi-75270
| | - Saad Mirza
- Molecular Biology and Human Genetics Laboratory
- Dr. Panjwani Center for Molecular Medicine and Drug Research (PCMD)
- International Center for Chemical and Biological Sciences (ICCBS)
- University of Karachi
- Karachi-75270
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13
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Leeners B, Geary N, Tobler PN, Asarian L. Ovarian hormones and obesity. Hum Reprod Update 2017; 23:300-321. [PMID: 28333235 DOI: 10.1093/humupd/dmw045] [Citation(s) in RCA: 190] [Impact Index Per Article: 27.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/30/2016] [Accepted: 11/23/2016] [Indexed: 12/13/2022] Open
Abstract
BACKGROUND Obesity is caused by an imbalance between energy intake, i.e. eating and energy expenditure (EE). Severe obesity is more prevalent in women than men worldwide, and obesity pathophysiology and the resultant obesity-related disease risks differ in women and men. The underlying mechanisms are largely unknown. Pre-clinical and clinical research indicate that ovarian hormones may play a major role. OBJECTIVE AND RATIONALE We systematically reviewed the clinical and pre-clinical literature on the effects of ovarian hormones on the physiology of adipose tissue (AT) and the regulation of AT mass by energy intake and EE. SEARCH METHODS Articles in English indexed in PubMed through January 2016 were searched using keywords related to: (i) reproductive hormones, (ii) weight regulation and (iii) central nervous system. We sought to identify emerging research foci with clinical translational potential rather than to provide a comprehensive review. OUTCOMES We find that estrogens play a leading role in the causes and consequences of female obesity. With respect to adiposity, estrogens synergize with AT genes to increase gluteofemoral subcutaneous AT mass and decrease central AT mass in reproductive-age women, which leads to protective cardiometabolic effects. Loss of estrogens after menopause, independent of aging, increases total AT mass and decreases lean body mass, so that there is little net effect on body weight. Menopause also partially reverses women's protective AT distribution. These effects can be counteracted by estrogen treatment. With respect to eating, increasing estrogen levels progressively decrease eating during the follicular and peri-ovulatory phases of the menstrual cycle. Progestin levels are associated with eating during the luteal phase, but there does not appear to be a causal relationship. Progestins may increase binge eating and eating stimulated by negative emotional states during the luteal phase. Pre-clinical research indicates that one mechanism for the pre-ovulatory decrease in eating is a central action of estrogens to increase the satiating potency of the gastrointestinal hormone cholecystokinin. Another mechanism involves a decrease in the preference for sweet foods during the follicular phase. Genetic defects in brain α-melanocycte-stimulating hormone-melanocortin receptor (melanocortin 4 receptor, MC4R) signaling lead to a syndrome of overeating and obesity that is particularly pronounced in women and in female animals. The syndrome appears around puberty in mice with genetic deletions of MC4R, suggesting a role of ovarian hormones. Emerging functional brain-imaging data indicates that fluctuations in ovarian hormones affect eating by influencing striatal dopaminergic processing of flavor hedonics and lateral prefrontal cortex processing of cognitive inhibitory controls of eating. There is a dearth of research on the neuroendocrine control of eating after menopause. There is also comparatively little research on the effects of ovarian hormones on EE, although changes in ovarian hormone levels during the menstrual cycle do affect resting EE. WIDER IMPLICATIONS The markedly greater obesity burden in women makes understanding the diverse effects of ovarian hormones on eating, EE and body adiposity urgent research challenges. A variety of research modalities can be used to investigate these effects in women, and most of the mechanisms reviewed are accessible in animal models. Therefore, human and translational research on the roles of ovarian hormones in women's obesity and its causes should be intensified to gain further mechanistic insights that may ultimately be translated into novel anti-obesity therapies and thereby improve women's health.
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Affiliation(s)
- Brigitte Leeners
- Division of Reproductive Endocrinology, University Hospital Zurich, Frauenklinikstr. 10, CH 8091 Zurich, Switzerland.,Center for Integrative Human Physiology (ZIHP), University of Zurich, 8057 Zurich, Switzerland
| | - Nori Geary
- Department of Psychiatry, Weill Medical College of Cornell University, New York, NY 10065, USA
| | - Philippe N Tobler
- Center for Integrative Human Physiology (ZIHP), University of Zurich, 8057 Zurich, Switzerland.,Laboratory for Social and Neural Systems Research, Department of Economics, University of Zurich, 8006 Zurich, Switzerland
| | - Lori Asarian
- Center for Integrative Human Physiology (ZIHP), University of Zurich, 8057 Zurich, Switzerland.,Institute of Veterinary Physiology, University of Zurich, 8057 Zurich, Switzerland
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14
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Leońska-Duniec A, Jastrzębski Z, Zarębska A, Smółka W, Cięszczyk P. Impact of the Polymorphism Near MC4R (rs17782313) on Obesity- and Metabolic-Related Traits in Women Participating in an Aerobic Training Program. J Hum Kinet 2017; 58:111-119. [PMID: 28828082 PMCID: PMC5548159 DOI: 10.1515/hukin-2017-0073] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022] Open
Abstract
The C/T polymorphism (rs17782313) mapped 188 kb downstream of the melanocortin-4 receptor gene (MC4R) shows a strong relationship with an increased body mass index (BMI) and the risk of type 2 diabetes. However, the information on polymorphism’s potential modifying effect on obesity- and metabolic-related traits achieved through training is still unknown. Therefore, we decided to check if selected body measurements observed in physically active participants would be modulated by the genotype. The genotype distribution was examined in a group of 201 Polish women measured for chosen traits before and after the completion of a 12 week moderate-intensive aerobic training program. A statistically significant relationship between the glucose level and the genotype was identified (p = 0.046). Participants with CC and CT genotypes had a higher glucose level during the entire study period compared with the TT genotype. However, our results did not confirm the relationship between the C allele and an increased BMI or other obesity-related traits. Additionally, we did not observe a near MC4R C/T polymorphism x physical activity interaction. However, our results revealed that majority of obesity-related variables changed significantly during the 12 week training program. The effect sizes (d) of these changes ranged from small to medium (d = 0.11-0.80), whereas the largest effect (d = 0.80; i.e. medium) was reported for the fat mass content (FM). We found a relationship between the near MC4R C/T polymorphism and an increased glucose level, and it is thus a candidate to influence type 2 diabetes. Interestingly, after the 12 week training program, participants with the C (risk) allele with fasting hyperglycemia had a normal glucose level. Although, this change was not statistically significant, it shows an important trend which needs further investigation.
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Affiliation(s)
- Agata Leońska-Duniec
- Faculty of Physical Culture and Health Promotion, University of Szczecin, Szczecin, Poland
| | - Zbigniew Jastrzębski
- Faculty of Tourism and Recreation, Gdansk University of Physical Education and Sport, Gdansk, Poland
| | - Aleksandra Zarębska
- Faculty of Tourism and Recreation, Gdansk University of Physical Education and Sport, Gdansk, Poland
| | - Wojciech Smółka
- Clinical Department of Laryngology, School of Medicine in Katowice, Medical University of Silesia, Katowice, Poland
| | - Paweł Cięszczyk
- Faculty of Physical Education, Gdansk University of Physical Education and Sport, Gdansk, Poland
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15
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Sheikh AB, Nasrullah A, Haq S, Akhtar A, Ghazanfar H, Nasir A, Afzal RM, Bukhari MM, Chaudhary AY, Naqvi SW. The Interplay of Genetics and Environmental Factors in the Development of Obesity. Cureus 2017; 9:e1435. [PMID: 28924523 PMCID: PMC5587406 DOI: 10.7759/cureus.1435] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
Obesity is a major health issue in the developed nations, and it has been increasingly clear that both genetics and environment play an important role in determining if an individual will be obese or not. We reviewed the latest researches which were carried out to identify the obesity susceptible genes and to identify the metabolic pathways having a central role in energy balance. Obesity is a heritable disorder, and some of the many obesity susceptible genes are fat mass and obesity (FTO), leptin, and Melanocortin-4 receptor (MC4R). Glucose metabolism is the central pathway for fatty acid synthesis, de novo generating the major substrate acetyl-CoA. Further knowledge of these genes and their complex interaction with the environment will help devise individual, family and community-based preventive lifestyle interventions as well as nutritional and medical therapies.
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Affiliation(s)
| | - Adeel Nasrullah
- Department of Internal Medicine, Shifa International Hospital
| | - Shujaul Haq
- Department of Internal Medicine, Shifa International Hospital
| | - Aisha Akhtar
- Surgery, Texas Tech Health Sciences Center Lubbock
| | | | - Amara Nasir
- Shifa College of Medicine, Shifa International Hospital
| | - Rao M Afzal
- Internal Medicine, Shifa College Of Medicine
| | | | | | - Syed W Naqvi
- Shifa College of Medicine, Shifa International Hospital
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16
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Rotter I, Skonieczna-Żydecka K, Kosik-Bogacka D, Adler G, Rył A, Laszczyńska M. Relationships between FTO rs9939609, MC4R rs17782313, and PPARγ rs1801282 polymorphisms and the occurrence of selected metabolic and hormonal disorders in middle-aged and elderly men - a preliminary study. Clin Interv Aging 2016; 11:1723-1732. [PMID: 27920511 PMCID: PMC5126003 DOI: 10.2147/cia.s120253] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PURPOSE Metabolic disorders, including MetS, obesity, and lipid disorders, may be related to genetic factors. Metabolic disorders are associated with decreased TS levels in aging men. The aim of this study was to evaluate the relationship between FTO rs9939609, MC4R rs17782313, and PPARγ rs1801282 polymorphisms and the presence of MetS and its components, the concurrent lipid disorders, as well as sex hormone concentrations. SUBJECTS AND METHODS This study involved 272 men of Caucasian descent aged 50-75 years. Lipid profile, including TCh, LDL, HDL, and TG, was evaluated by spectrophotometric method. Anthropometric measurements concerned WC and blood pressure. MetS was diagnosed according to the criteria of the IDF. Sex hormone profile, including TST, FTS, E2, DHEAS, and SHBG, was examined using enzyme-linked immunosorbent assay. Polymorphisms within FTO, MC4R, and PPARγ genes were identified using polymerase chain reaction-restriction fragments length polymorphism. RESULTS This study did not show links between the analyzed genetic polymorphisms and the presence of MetS, T2DM, HT, and obesity. However, higher concentrations of TCh and LDL were found in men with the FTO rs9939609 polymorphism in the recessive mode of inheritance (P=0.03 and P=0.05, respectively). Lower WC was found to be associated with MC4R rs17782313 gene inherited in the same model (P=0.005). CONCLUSION FTO rs9939609, MC4R rs17782313, and PPARγ rs1801282 polymorphisms seem to have little effect on the incidence of metabolic malfunctions and no effect on androgen-related disorders in the examined middle-aged and elderly men.
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Affiliation(s)
| | | | | | | | - Aleksandra Rył
- Department of Histology and Developmental Biology, Pomeranian Medical University, Szczecin, Poland
| | - Maria Laszczyńska
- Department of Histology and Developmental Biology, Pomeranian Medical University, Szczecin, Poland
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17
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Young KL, Graff M, North KE, Richardson AS, Mohlke KL, Lange LA, Lange EM, Harris KM, Gordon-Larsen P. Interaction of smoking and obesity susceptibility loci on adolescent BMI: The National Longitudinal Study of Adolescent to Adult Health. BMC Genet 2015; 16:131. [PMID: 26537541 PMCID: PMC4634717 DOI: 10.1186/s12863-015-0289-6] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Accepted: 10/29/2015] [Indexed: 12/28/2022] Open
Abstract
BACKGROUND Adolescence is a sensitive period for weight gain and risky health behaviors, such as smoking. Genome-wide association studies (GWAS) have identified loci contributing to adult body mass index (BMI). Evidence suggests that many of these loci have a larger influence on adolescent BMI. However, few studies have examined interactions between smoking and obesity susceptibility loci on BMI. This study investigates the interaction of current smoking and established BMI SNPs on adolescent BMI. Using data from the National Longitudinal Study of Adolescent to Adult Health, a nationally-representative, prospective cohort of the US school-based population in grades 7 to 12 (12-20 years of age) in 1994-95 who have been followed into adulthood (Wave II 1996; ages 12-21, Wave III; ages 18-27), we assessed (in 2014) interactions of 40 BMI-related SNPs and smoking status with percent of the CDC/NCHS 2000 median BMI (%MBMI) in European Americans (n = 5075), African Americans (n = 1744) and Hispanic Americans (n = 1294). RESULTS Two SNPs showed nominal significance for interaction (p < 0.05) between smoking and genotype with %MBMI in European Americans (EA) (rs2112347 (POC5): β = 1.98 (0.06, 3.90), p = 0.04 and near rs571312 (MC4R): β 2.15 (-0.03, 4.33) p = 0.05); and one SNP showed a significant interaction effect after stringent correction for multiple testing in Hispanic Americans (HA) (rs1514175 (TNNI3K): β 8.46 (4.32, 12.60), p = 5.9E-05). Stratifying by sex, these interactions suggest a stronger effect in female smokers. CONCLUSIONS Our study highlights potentially important sex differences in obesity risk by smoking status in adolescents, with those who may be most likely to initiate smoking (i.e., adolescent females), being at greatest risk for exacerbating genetic obesity susceptibility.
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Affiliation(s)
- Kristin L Young
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- , 137 East Franklin Street, Suite 306, Chapel Hill, NC, 27514, USA.
| | - Misa Graff
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Kari E North
- Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Carolina Center for Genome Sciences, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Andrea S Richardson
- Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Karen L Mohlke
- Carolina Center for Genome Sciences, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Genetics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Leslie A Lange
- Carolina Center for Genome Sciences, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Genetics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Ethan M Lange
- Carolina Center for Genome Sciences, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Genetics, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Kathleen M Harris
- Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Sociology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
| | - Penny Gordon-Larsen
- Carolina Population Center, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
- Department of Nutrition, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, NC, USA.
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18
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Wirix AJG, Kaspers PJ, Nauta J, Chinapaw MJM, Kist-van Holthe JE. Pathophysiology of hypertension in obese children: a systematic review. Obes Rev 2015; 16:831-42. [PMID: 26098701 DOI: 10.1111/obr.12305] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2015] [Revised: 05/18/2015] [Accepted: 05/18/2015] [Indexed: 12/27/2022]
Abstract
Hypertension is increasingly common in overweight and obese children. The mechanisms behind the development of hypertension in obesity are complex, and evidence is limited. In order to effectively treat obese children for hypertension, it is important to have a deeper understanding of the pathophysiology of hypertension in obese children. The present review summarizes the main factors associated with hypertension in obese children and discusses their potential role in its pathophysiology. Systematic searches were conducted in PubMed and EMBASE for articles published up to October 2014. In total, 60 relevant studies were included. The methodological quality of the included studies ranged from weak to strong. Several factors important in the development of hypertension in obese children have been suggested, including endocrine determinants, such as corticosteroids and adipokines, sympathetic nervous system activity, disturbed sodium homeostasis, as well as oxidative stress, inflammation and endothelial dysfunction. Understanding the pathophysiology of hypertension in overweight and obese children is important and could have implications for its screening and treatment. Based on solely cross-sectional observational studies, it is impossible to infer causality. Longitudinal studies of high methodological quality are needed to gain more insight into the complex mechanisms behind the development of hypertension in obese children.
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Affiliation(s)
- A J G Wirix
- Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
| | - P J Kaspers
- Medical Library, VU University Medical Center, Amsterdam, The Netherlands
| | - J Nauta
- Department of Pediatric Nephrology, Erasmus Medical Center, Rotterdam, The Netherlands
| | - M J M Chinapaw
- Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
| | - J E Kist-van Holthe
- Department of Public and Occupational Health, EMGO Institute for Health and Care Research, VU University Medical Center, Amsterdam, The Netherlands
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19
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Albuquerque D, Nóbrega C, Rodríguez-López R, Manco L. Association study of common polymorphisms in MSRA, TFAP2B, MC4R, NRXN3, PPARGC1A, TMEM18, SEC16B, HOXB5 and OLFM4 genes with obesity-related traits among Portuguese children. J Hum Genet 2014; 59:307-13. [PMID: 24670271 DOI: 10.1038/jhg.2014.23] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2013] [Revised: 02/06/2014] [Accepted: 03/03/2014] [Indexed: 02/01/2023]
Abstract
At least 52 genetic loci were associated with obesity-related traits. However, little is known about the genetic basis of obesity among children. This study aims to test whether 10 polymorphisms in obesity-related genes methionine sulfoxide reductase A (MSRA), transcription factor AP-2 beta (TFAP2B), melanocortin 4 receptor (MC4R), neurexin 3 (NRXN3), peroxisome proliferator-activated receptor gamma coactivator 1 alpha (PPARGC1A), transmembrane protein 18 (TMEM18), homolog of S. cerevisiae Sec16 (SEC16B), homeobox B5 (HOXB5) and olfactomedin 4 (OLFM4) are associated with the risk of obesity in Portuguese children. A total of 730 children aging from 6 to 12 years old, recruited randomly from public schools in Portugal, were analysed. Anthropometric measurements were obtained and children were classified into three phenotypic groups, normal weight (n=256), overweight (n=320) and obese (n=154), according to the International Obesity Task Force cutoffs. Polymorphisms were genotyped by allelic discrimination TaqMan assays. The MC4R rs12970134 polymorphism was nominally associated with body mass index (BMI) (P=0.035), BMI Z-score (P=0.043) and waist circumference (P=0.020), and borderline associated with weight (P=0.053). Near nominal associations were also found for the PPARGC1A rs8192678 polymorphism with weight (P=0.061), and for the MSRA rs545854 polymorphism with BMI (P=0.055) and BMI Z-score (P=0.056). Furthermore, logistic regression showed that MC4R rs12970134 and TFAP2B rs987237 were nominally, respectively, associated (P=0.029) and borderline associated (P=0.056) with the obese phenotype. This study highlighted the possible association of MC4R, PPARGC1A, MSRA and TFAP2B polymorphisms with several obesity-related traits in a sample of Portuguese children. The two significant associated TFAP2B rs987237 and MC4R rs12970134 polymorphisms showed an opposite direction of effect to that in the original reports.
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Affiliation(s)
- David Albuquerque
- Department of Life Sciences, Research Centre for Anthropology and Health (CIAS), University of Coimbra, Coimbra, Portugal
| | - Clévio Nóbrega
- Center for Neurosciences and Cell Biology, University of Coimbra, Coimbra, Portugal
| | | | - Licínio Manco
- Department of Life Sciences, Research Centre for Anthropology and Health (CIAS), University of Coimbra, Coimbra, Portugal
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Acosta A, Camilleri M, Shin A, Carlson P, Burton D, O'Neill J, Eckert D, Zinsmeister AR. Association of melanocortin 4 receptor gene variation with satiation and gastric emptying in overweight and obese adults. GENES AND NUTRITION 2014; 9:384. [PMID: 24458996 DOI: 10.1007/s12263-014-0384-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/16/2013] [Accepted: 01/11/2014] [Indexed: 12/14/2022]
Abstract
Melanocortin 4 receptor (MC4R) has a major role in energy homeostasis. The rs17782313 polymorphism, mapped 188 kb downstream from MC4R, has been associated with satiety, higher body mass index (BMI) and total calorie intake in adults. To assess the association of rs17782313 with gastric functions, satiation, or satiety, we studied 178 predominantly Caucasian overweight and obese people: 120 females, 58 males; mean BMI 33.4 ± 5.3 kg/m(2) (SD); age 37.7 ± 11.2 years. Quantitative traits assessed were gastric emptying (GE) of solids and liquids; fasting and postprandial gastric volume; satiation by maximum tolerated volume and 4 symptoms by 100-mm visual analog scales (VAS); and satiety by ad libitum buffet meal. Associations of genotype and quantitative traits were assessed by analysis of covariance (using gender and BMI as covariates), based on a dominant [TC (n = 72) - CC (n = 12) vs. TT (n = 94)] genetic model. rs17782313(C) was associated with postprandial satiation symptoms (median Δ total VAS 26.5 mm, p = 0.036), reduced proportion of solid GE at 2 h (median Δ 6.7 %, p = 0.008) and 4 h (median Δ 3.2 %, p = 0.006), and longer t ½ (median Δ 6 min, p = 0.034). Associations of rs17782313 with obesity may be explained by reduced satiation and GE. The role of MC4R mechanisms in satiation and gastric function deserves further study.
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Affiliation(s)
- Andres Acosta
- Clinical Enteric Neuroscience Translational and Epidemiological Research (C.E.N.T.E.R.), Division of Gastroenterology and Hepatology, Department of Medicine, Mayo Clinic, Charlton 8-110, 200 First St. S.W., Rochester, MN, 55905, USA
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Wang YL, Liang HY, Gao YH, Wu XJ, Chen X, Pan BY, Yang XX, Liu HZ. A functional variant of NEDD4L is associated with obesity and related phenotypes in a Han population of Southern China. Int J Mol Sci 2013; 14:7433-44. [PMID: 23549273 PMCID: PMC3645694 DOI: 10.3390/ijms14047433] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2013] [Revised: 03/15/2013] [Accepted: 03/25/2013] [Indexed: 01/22/2023] Open
Abstract
NEDD4L is a candidate gene for hypertension, both functionally and genetically. Recently, studies showed evidence for the association of NEDD4L with obesity, a key intermediate phenotype in hypertension. To further investigate the relationship between NEDD4L and body mass-related phenotypes, we genotyped three common variants (rs2288774, rs3865418 and rs4149601) in a population-based study of 892 unrelated Han Cantonese using the Sequenom MALDI-TOF-MS platform. Allele frequencies and genotype distribution were calculated in lean controls and overweight/obese cases and analyzed for association by the Chi-squared test and Logistic regression. Linear regression analysis was used to analyze the effect of individual genotypes on quantitative traits. Multivariate analyses demonstrated that the minor allele of rs4149601(A = 20.9%) was associated with a 2.60 kg, 2.78 cm and 0.97 kg/m2 decrease per allele copy in weight, waist and BMI, respectively. Carriers of this allele also had a significant lower risk of overweight/obesity (p < 0.0001, OR = 0.52, 95% CI: 0.37–0.74) as compared to non-carriers. However, no significant association between genotypes at rs2288774 and rs3865418 and covariate-adjusted overweight/obesity or any related phenotypes was observed. These results suggested that the functional variant of NEDD4L, rs4149601, may be associated with obesity and related phenotypes, and further genetic and functional studies are required to understand its role in the manifestation of obesity.
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Affiliation(s)
- Yu-Lin Wang
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
| | - Hui-Ying Liang
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
| | - Yun-He Gao
- Guangzhou Women and Children Medical Center, Guangzhou 510623, China; E-Mail:
| | - Xue-Ji Wu
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
| | - Xi Chen
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
| | - Bing-Ying Pan
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
| | - Xue-Xi Yang
- School of Biotechnology, Southern Medical University, Guangzhou 510515, China
- Authors to whom correspondence should be addressed; E-Mails: (H.-Z.L.); (X.-X.Y.); Tel.: +86-20-3605-2382 (H.-Z.L.); Fax: +86-20-3605-5896 (H.-Z.L.); Tel./Fax: +86-20-6164-8550 (X.-X.Y.)
| | - Hua-Zhang Liu
- Guangzhou Center for Disease Control and Prevention, Guangzhou 510440, China; E-Mails: (Y.-L.W.); (H.-Y.L.); (X.-J.W.); (X.C.); (B.-Y.P.)
- Authors to whom correspondence should be addressed; E-Mails: (H.-Z.L.); (X.-X.Y.); Tel.: +86-20-3605-2382 (H.-Z.L.); Fax: +86-20-3605-5896 (H.-Z.L.); Tel./Fax: +86-20-6164-8550 (X.-X.Y.)
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Melanocortin-4 Receptor in Energy Homeostasis and Obesity Pathogenesis. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2013; 114:147-91. [DOI: 10.1016/b978-0-12-386933-3.00005-4] [Citation(s) in RCA: 115] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Xi B, Chandak GR, Shen Y, Wang Q, Zhou D. Association between common polymorphism near the MC4R gene and obesity risk: a systematic review and meta-analysis. PLoS One 2012; 7:e45731. [PMID: 23049848 PMCID: PMC3458070 DOI: 10.1371/journal.pone.0045731] [Citation(s) in RCA: 93] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2012] [Accepted: 08/21/2012] [Indexed: 12/14/2022] Open
Abstract
BACKGROUND Genome-wide association studies on Europeans have shown that two polymorphisms (rs17782313, rs12970134) near the melanocortin 4 receptor (MC4R) gene were associated with increased risk of obesity. Subsequently studies among different ethnic populations have shown mixed results with some confirming and others showing inconsistent results, especially among East Asians and Africans. We performed a comprehensive meta-analysis of various studies from different ethnic populations to assess the association of the MC4R polymorphism with obesity risk. METHODS We retrieved all published literature that investigated association of MC4R variants with obesity from PubMed and Embase. Pooled odds ratio (OR) with 95% confidence interval (CI) was calculated using fixed- or random-effects model. RESULTS A total of 61 studies (80,957 cases/220,223 controls) for rs17782313 polymorphism (or proxy) were included in the meta-analysis. The results suggested that rs17782313 polymorphism was significantly associated with obesity risk (OR=1.18, 95%CI=1.15-1.21, p<0.001). Similar trends were observed among subgroups of Europeans and East Asians, adults and children, studies with high quality score, and for each five MC4R polymorphisms independently. CONCLUSIONS The present meta-analysis confirms the significant association of MC4R polymorphism with risk of obesity. Further studies should be conducted to identify the causal variant and the underlying mechanisms of the identified association.
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Affiliation(s)
- Bo Xi
- Department of Maternal and Child Health Care, School of Public Health, Shandong University, Jinan, Shandong, People's Republic of China
- * E-mail: (BX); (DZ)
| | - Giriraj R. Chandak
- Centre for Cellular and Molecular Biology, Council of Scientific and Industrial Research, Hyderabad, Andhra Pradesh, India
| | - Yue Shen
- Department of Epidemiology, Capital Institute of Pediatrics, Beijing, People's Republic of China
| | - Qijuan Wang
- Department of Maternal and Child Health Care, School of Public Health, Shandong University, Jinan, Shandong, People's Republic of China
| | - Donghao Zhou
- Department of Endocrinology, Linyi People's Hospital, Linyi, Shandong, People's Republic of China
- * E-mail: (BX); (DZ)
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Rank M, Siegrist M, Wilks DC, Haller B, Wolfarth B, Langhof H, Halle M. Long-term effects of an inpatient weight-loss program in obese children and the role of genetic predisposition-rationale and design of the LOGIC-trial. BMC Pediatr 2012; 12:30. [PMID: 22429873 PMCID: PMC3368736 DOI: 10.1186/1471-2431-12-30] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 03/19/2012] [Indexed: 02/02/2023] Open
Abstract
Background The prevalence of childhood obesity has increased worldwide, which is a serious concern as obesity is associated with many negative immediate and long-term health consequences. Therefore, the treatment of overweight and obesity in children and adolescents is strongly recommended. Inpatient weight-loss programs have shown to be effective particularly regarding short-term weight-loss, whilst little is known both on the long-term effects of this treatment and the determinants of successful weight-loss and subsequent weight maintenance. The purpose of this study is to evaluate the short, middle and long-term effects of an inpatient weight-loss program for children and adolescents and to investigate the likely determinants of weight changes, whereby the primary focus lies on the potential role of differences in polymorphisms of adiposity-relevant genes. Methods/Design The study involves overweight and obese children and adolescents aged 6 to 19 years, who participate in an inpatient weight-loss program for 4 to 6 weeks. It started in 2006 and it is planned to include 1,500 participants by 2013. The intervention focuses on diet, physical activity and behavior therapy. Measurements are taken at the start and the end of the intervention and comprise blood analyses (DNA, lipid and glucose metabolism, adipokines and inflammatory markers), anthropometry (body weight, height and waist circumference), blood pressure, pubertal stage, and exercise capacity. Physical activity, dietary habits, quality of life, and family background are assessed by questionnaires. Follow-up assessments are performed 6 months, 1, 2, 5 and 10 years after the intervention: Children will complete the same questionnaires at all time points and visit their general practitioner for examination of anthropometric parameters, blood pressure and assessment of pubertal stage. At the 5 and 10 year follow-ups, blood parameters and exercise capacity will be additionally measured. Discussion Apart from illustrating the short, middle and long-term effects of an inpatient weight-loss program, this study will contribute to a better understanding of inter-individual differences in the regulation of body weight, taking into account the role of genetic predisposition and lifestyle factors. Trial Registration NCT01067157.
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Affiliation(s)
- Melanie Rank
- Department of Prevention, Rehabilitation and Sports Medicine, Technische Universität München, Klinikum rechts der Isar, Munich, Germany.
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Scherag A, Kleber M, Boes T, Kolbe AL, Ruth A, Grallert H, Illig T, Heid IM, Toschke AM, Grau K, Sørensen TIA, Hebebrand J, Hinney A, Reinehr T. SDCCAG8 obesity alleles and reduced weight loss after a lifestyle intervention in overweight children and adolescents. Obesity (Silver Spring) 2012; 20:466-70. [PMID: 22095114 DOI: 10.1038/oby.2011.339] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/21/2022]
Abstract
Genome-wide association analyses (GWAS) contributed to the detection of a number of single-nucleotide polymorphisms (SNPs) associated with obesity. However, little is known about the impact of the obesity-risk alleles on weight loss-related phenotypes after lifestyle interventions. A recent meta-analysis of GWAS reported five genomic loci near or in the genes FTO, MC4R, TMEM18, SDCCAG8, TNKS/MSRA that were associated with obesity in children and adolescents. Here, we analyzed the effect of the 10 SNPs representative of the five loci on measures of weight loss and cardiometabolic risk after a 1-year lifestyle intervention in 401 children and adolescents (mean age 10.74 years; 55.4% female; mean BMI 27.42 kg/m(2), mean BMI-standard deviation score (SDS) 2.37). For confirmation of one locus genotyping of three intronic SNPs in SDCCAG8 was performed in 626 obese adults who completed the 10-week hypoenergetic diet program. Intronic variants of SDCCAG8, which are associated with early onset obesity, are associated with reduced weight loss after a 1-year lifestyle intervention in overweight children and adolescents even after adjusting for age, sex, baseline measurement, or multiple testing (all P < 10(-6)). However, our results could not be confirmed in 626 obese adults undertaking a hypoenergetic diet intervention.
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Affiliation(s)
- André Scherag
- Institute for Medical Informatics, Biometry and Epidemiology, University of Duisburg-Essen, Essen, Germany.
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Hebebrand J. Obesity Facts. Contents of this issue. Obes Facts 2011; 4:6-8. [PMID: 21372605 PMCID: PMC6444807 DOI: 10.1159/000324880] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022] Open
Affiliation(s)
- Johannes Hebebrand
- *Prof. Dr. Johannes Hebebrand, Department of Child and Adolescent Psychiatry, University of Duisburg-Essen, Virchowstra�e 174, 45147 Essen, Germany, Tel: +49 201 7227-465, Fax -302,
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