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Coimbra S, Rocha S, Catarino C, Valente MJ, Rocha-Pereira P, Sameiro-Faria M, Oliveira JG, Madureira J, Fernandes JC, Miranda V, Belo L, Bronze-da-Rocha E, Santos-Silva A. Impact of TNFRSF1B (rs3397, rs1061624 and rs1061622) and IL6 (rs1800796, rs1800797 and rs1554606) Gene Polymorphisms on Inflammatory Response in Patients with End-Stage Kidney Disease Undergoing Dialysis. Biomedicines 2024; 12:1228. [PMID: 38927435 PMCID: PMC11200861 DOI: 10.3390/biomedicines12061228] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/29/2024] [Revised: 05/24/2024] [Accepted: 05/28/2024] [Indexed: 06/28/2024] Open
Abstract
We aimed to study the impact of polymorphisms in the genes encoding interleukin-6 (IL6) and tumor necrosis factor receptor-2 (TNFR2), reported to be mortality risk predictors, in patients with end-stage kidney disease (ESKD) undergoing dialysis. TNFRSF1B (rs3397, rs1061624, and rs1061622) and IL6 (rs1800796, rs1800797, and rs1554606) polymorphisms were studied in patients with ESKD and controls; the genotype and allele frequencies and the associations with inflammatory and erythropoiesis markers were determined; deaths were recorded throughout the following two years. The genotype and allele frequencies for the TNFRSF1B rs3397 polymorphism were different in these patients compared to those in the controls and the global and European populations, and patients with the C allele were less common. Patients with the CC genotype for TNFRSF1B rs3397 presented higher hemoglobin and erythrocyte counts and lower TNF-α levels, suggesting a more favorable inflammatory response that seems to be associated with erythropoiesis improvement. Patients with the GG genotype for TNFRSF1B rs1061622 showed lower serum ferritin levels. None of the TNFRSF1B (rs3397, rs1061624, and rs1061622) or IL6 (rs1800796, rs1800797, and rs1554606) polymorphisms had a significant impact on the all-cause mortality rate of Portuguese patients with ESKD.
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Affiliation(s)
- Susana Coimbra
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
- 1H-TOXRUN—One Health Toxicology Research Unit, University Institute of Health Sciences, CESPU (Advanced Polytechnic and University Cooperative, CRL), 4585-116 Gandra, Portugal
| | - Susana Rocha
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
| | - Cristina Catarino
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
| | - Maria João Valente
- National Food Institute, Technical University of Denmark, 2800 Kongens Lyngby, Denmark;
| | - Petronila Rocha-Pereira
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
- Health Science Research Centre, University of Beira Interior, 6201-001 Covilhã, Portugal
| | - Maria Sameiro-Faria
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
- Hemodialysis Clinic Hospital Agostinho Ribeiro, 4610-106 Felgueiras, Portugal
| | - José Gerardo Oliveira
- Hemodialysis Clinic of Porto (CHP), 4200-227 Porto, Portugal
- Center for Health Technology and Services Research (CINTESIS), Faculty of Medicine, University of Porto, 4200-450 Porto, Portugal
| | - José Madureira
- Hemodialysis Unit of Barcelos | Nefroserve, 4750-110 Barcelos, Portugal
| | - João Carlos Fernandes
- Hemodialysis Unit of Viana do Castelo | Nefroserve, 4900-281 Viana do Castelo, Portugal
| | - Vasco Miranda
- Hemodialysis Clinic of Gondomar, 4420-086 Gondomar, Portugal
| | - Luís Belo
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
| | - Elsa Bronze-da-Rocha
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
| | - Alice Santos-Silva
- UCIBIO—Applied Molecular Biosciences Unit, Associate Laboratory, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal; (S.R.); (C.C.); (L.B.); (E.B.-d.-R.)
- Associate Laboratory i4HB—Institute for Health and Bioeconomy, Faculdade de Farmácia da Universidade do Porto, 4050-313 Porto, Portugal
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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: 16] [Impact Index Per Article: 16.0] [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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Molecular and Pharmacological Evidence for the Expression of Multiple Functional P2 Purinergic Receptors in Human Adipocytes. MOLECULES (BASEL, SWITZERLAND) 2022; 27:molecules27061913. [PMID: 35335277 PMCID: PMC8954896 DOI: 10.3390/molecules27061913] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 03/09/2022] [Accepted: 03/10/2022] [Indexed: 11/17/2022]
Abstract
Extracellular ATP exerts important functions as an extracellular signaling molecule via the activation of specific P2 purinergic receptors (P2X and P2Y). We investigated the expression of the different P2 receptors and their possible functional activation in human adipocytes in primary culture. We performed molecular expression analysis of the P2 receptors in human mature adipocytes; examined their functional activation by different nucleotides evaluating [Ca2+]i modifications and IL-6 secretion, and determined the ability of adipocytes to release ATP in the extracellular medium. Human adipocytes express different P2X and P2Y receptors. Extracellular ATP elicited a rise in [Ca2+]i via the activation of P2X and P2Y receptor subtypes. Human adipocytes spontaneously released ATP in the extracellular medium and secreted IL-6 both at rest and after stimulation with ATP. This stimulatory effect of ATP on IL-6 secretion was inhibited by pre-incubation with apyrase, an ATP metabolizing enzyme. These results demonstrate that human adipocytes express different P2X and P2Y receptors that are functionally activated by extracellular nucleotides. Furthermore, human adipocytes spontaneously release ATP, which can act in an autocrine/paracrine fashion on adipocytes, possibly participating in the regulation of inflammatory cytokine release. Thus, P2 purinergic receptors could be a potential therapeutic target to contrast the inflammatory and metabolic complications characterizing obesity.
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Van Alsten SC, Rabkin CS, Sawada N, Shimazu T, Charvat H, Yamaji T, Inoue M, Kemp TJ, Pinto LA, Camargo MC, Tsugane S, Song M. Metabolic Syndrome, Physical Activity, and Inflammation: A Cross-Sectional Analysis of 110 Circulating Biomarkers in Japanese Adults. Cancer Epidemiol Biomarkers Prev 2020; 29:1639-1646. [PMID: 32467351 DOI: 10.1158/1055-9965.epi-19-1513] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/03/2020] [Accepted: 05/22/2020] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Metabolic syndrome (MetS) is a systemic inflammatory state. Low physical activity (PA) could modify this patho-physiology or act as an independent contributor to inflammation. Previous studies of both conditions have identified altered levels of inflammation- and immune-related proteins based on limited sets of candidate markers. METHODS We investigated associations of MetS and low PA with circulating inflammation markers in a stratified random sample of Japanese adults (N = 774, mean age 60.7 years) within the Japan Public Health Center-based Prospective Study (JPHC) Cohort II. AHA/NHLBI criteria were used to define MetS (19%) and the bottom quartile of PA was considered low. 110 circulating biomarkers, including cytokines, chemokines, and soluble receptors were measured by multiplex bead-based and proximity-extension assays. Associations of MetS and low PA with marker quantiles were adjusted for each other and for age, sex, study site, cigarette smoking, alcohol consumption, and blood sample fasting state by ordinal logistic regression. P values were corrected for FDR. RESULTS MetS was significantly associated with levels of six markers: IL18R1 [odds ratio 2.37; 95% confidence interval (CI), 1.45-3.87], CRP (2.07; 95% CI, 1.48-2.90), SAP (2.08; 95% CI, 1.47-2.95), CCL19/MIP3β (2.06; 95% CI, 1.48-2.88), CXCL12/SDF1α+β (0.48; 95% CI, 0.32-0.65), and CCL28 (0.44; 95% CI, 0.27-0.71). Low PA had no significant marker associations. CONCLUSIONS Positively associated markers with MetS are mostly Th1 immune response-related and acute phase proteins, whereas negatively associated markers are generally Th2-related. IMPACT MetS is associated with a broad range of alterations in immune and inflammatory biomarkers that may contribute to risks of various chronic diseases, independent of low PA.
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Affiliation(s)
| | - Charles S Rabkin
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Norie Sawada
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Taichi Shimazu
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Hadrien Charvat
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Taiki Yamaji
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Manami Inoue
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Troy J Kemp
- HPV Immunology Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland
| | - Ligia A Pinto
- HPV Immunology Laboratory, Leidos Biomedical Research, Inc., Frederick National Laboratory for Cancer Research, Frederick, Maryland
| | - M Constanza Camargo
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland
| | - Shoichiro Tsugane
- Epidemiology and Prevention Group, Center for Public Health Sciences, National Cancer Center, Tokyo, Japan
| | - Minkyo Song
- Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Bethesda, Maryland.
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Ambrocio-Ortiz E, Pérez-Rubio G, Abarca-Rojano E, Montaño M, Ramos C, Hernández-Zenteno RD, Del Angel-Pablo AD, Reséndiz-Hernández JM, Ramírez-Venegas A, Falfán-Valencia R. Influence of proinflammatory cytokine gene polymorphisms on the risk of COPD and the levels of plasma protein. Cytokine 2018; 111:364-370. [DOI: 10.1016/j.cyto.2018.09.017] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2018] [Revised: 09/05/2018] [Accepted: 09/26/2018] [Indexed: 01/10/2023]
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Rodrigues APS, Rosa LPS, Silveira EA. PPARG2 Pro12Ala polymorphism influences body composition changes in severely obese patients consuming extra virgin olive oil: a randomized clinical trial. Nutr Metab (Lond) 2018; 15:52. [PMID: 30026785 PMCID: PMC6050653 DOI: 10.1186/s12986-018-0289-4] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2018] [Accepted: 07/11/2018] [Indexed: 01/07/2023] Open
Abstract
BACKGROUND Previous intervention studies have reported the association of the PPARG2 Pro12Ala (rs1801282) and IL6 -174G > C (rs1800795) polymorphisms with weight loss; however, their results are inconsistent. We aimed to investigate the effect of the PPARG2 Pro12Ala and IL6 -174G > C polymorphisms on body weight, body composition and metabolic parameters after a 12-week nutritional intervention with a traditional Brazilian diet and extra virgin olive oil supplementation in severely obese patients. METHODS A total of 149 severely obese individuals [body mass index (BMI) ≥ 35 kg/m2] were randomized into three 12-week nutritional intervention groups - the extra virgin olive oil supplementation (OO) group (n = 50), the traditional Brazilian diet (DieTBra) group (n = 49), and the DieTBra plus extra virgin olive oil supplementation (DieTBra+OO) group (n = 50). Anthropometric measurements, body composition, metabolic parameters, physical activity practise and dietary intake were assessed. The associations were tested using generalized linear models adjusted for confounders. RESULTS The PPARG2 Pro12Ala polymorphism influenced body composition changes. Ala carriers in the intervention groups with extra virgin olive oil supplementation had greater reductions in the percentage of body fat (%BF) (OO: p = 0.049, DietBra+OO: p = 0.004) and greater increases in both fat-free mass (FFM) (OO: p = 0.020, DieTBra: p = 0.007) and lean mass (LM) (OO: p = 0.020, DieTBra+OO: p = 0.007) than did ProPro homozygotes. No association was found for the IL6 -174G > C polymorphism. CONCLUSIONS Extra virgin olive oil intake may modulate favourable body composition changes, promoting a decrease in the %BF and increases in the LM and FFM of severely obese individuals, even without weight loss, in the presence of the Ala allele of the Pro12Ala polymorphism. TRIAL REGISTRATION Registered under ClinicalTrials.gov Identifier No. NCT02463435.
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Affiliation(s)
- Ana Paula Santos Rodrigues
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, 1a Avenida, s/n, Setor Leste Universitário, Goiânia, Goiás CEP 74605-020 Brazil
| | - Lorena Pereira Souza Rosa
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, 1a Avenida, s/n, Setor Leste Universitário, Goiânia, Goiás CEP 74605-020 Brazil
| | - Erika Aparecida Silveira
- Programa de Pós-Graduação em Ciências da Saúde, Faculdade de Medicina, Universidade Federal de Goiás, 1a Avenida, s/n, Setor Leste Universitário, Goiânia, Goiás CEP 74605-020 Brazil
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Interaction between childhood maltreatment on immunogenetic risk in depression: Discovery and replication in clinical case-control samples. Brain Behav Immun 2018; 67:203-210. [PMID: 28867280 DOI: 10.1016/j.bbi.2017.08.023] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/24/2017] [Revised: 08/01/2017] [Accepted: 08/30/2017] [Indexed: 01/08/2023] Open
Abstract
Major depressive disorder (MDD) is a prevalent disorder with moderate heritability. Both MDD and interpersonal adversity, including childhood maltreatment, have been consistently associated with elevated inflammatory markers. We investigated interaction between exposure to childhood maltreatment and extensive genetic variation within the inflammation pathway (CRP, IL1b, IL-6, IL11, TNF, TNFR1, and TNFR2) in relation to depression diagnosis. The discovery RADIANT sample included 262 cases with recurrent DSM-IV/ICD-10 MDD, and 288 unaffected controls. The replication Münster cohort included 277 cases with DSM-IV MDD, and 316 unaffected controls. We identified twenty-five single nucleotide polymorphisms (SNPs) following multiple testing correction that interacted with childhood maltreatment to predict depression in the discovery cohort. Seven SNPs representing independent signals (rs1818879, rs1041981, rs4149576, rs616645, rs17882988, rs1061622, and rs3093077) were taken forward for replication. Meta-analyses of the two samples presented evidence for interaction with rs1818879 (IL6) (RD=0.059, SE=0.016, p<0.001), with the replication Münster sample approaching statistical significance in analyses restricted to recurrent MDD and controls following correction for multiple testing (q=0.066). The CRP locus (rs3093077) showed a similar level of evidence for interaction in the meta-analysis (RD=0.092, SE=0.029, p=0.002), but less compelling evidence in the replication sample alone (recurrent MDD q=0.198; all MDD q=0.126). Here we present evidence suggestive of interaction with childhood maltreatment for novel loci in IL-6 (rs1818879) and CRP (rs3093077), increasing risk of depression. Replication is needed by independent groups, targeting these specific variants and interaction with childhood maltreatment on depression risk.
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Rodrigues APDS, Rosa LPS, da Silva HD, Silveira-Lacerda EDP, Silveira EA. The Single Nucleotide Polymorphism PPARG2 Pro12Ala Affects Body Mass Index, Fat Mass, and Blood Pressure in Severely Obese Patients. J Obes 2018; 2018:2743081. [PMID: 30652031 PMCID: PMC6311828 DOI: 10.1155/2018/2743081] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 11/08/2018] [Accepted: 11/14/2018] [Indexed: 01/10/2023] Open
Abstract
BACKGROUND The PPARG2 Pro12Ala (rs1801282) and IL6 -174G >C (rs1800795) have important function in body weight regulation and a potential role in obesity risk. We aimed to investigate the association between PPARG2 Pro12Ala and IL6 -174G >C variants and the genotypes interaction with body composition, metabolic markers, food consumption, and physical activity in severely obese patients. METHODS 150 severely obese patients (body mass index (BMI) ≥ 35 kg/m2) from Central Brazil were recruited. Body composition, metabolic parameters, physical activity, and dietary intake were measured. The genotype was determined by the qPCR TaqMan Assays System. Multiple linear regression and multiple logistic regression models were fitted adjusting for confounders. RESULTS Ala carriers of the Pro12Ala polymorphism had higher adiposity measures (BMI: p=0.031, and fat mass: p=0.049) and systolic blood pressure (p=0.026) compared to Pro homozygotes. We found no important associations between the -174G >C polymorphism and obesity phenotypes. When genotypes were combined, individuals with genotypes ProAla + AlaAla and GC + CC presented higher BMI (p=0.029) and higher polyunsaturated fatty acids (PUFAs) consumption (p=0.045) compared to the ones with genotypes ProPro and GG, and individuals carriers of the PPARG2 Ala allele only (genotype ProAla + AlaAla and GG) had higher fat mass and systolic and diastolic blood pressure compared to the ones with genotypes ProPro and GG. CONCLUSIONS Severely obese individuals carrying the Ala allele of the PPARG2 Pro12Ala polymorphism had higher measures of adiposity and blood pressure, while no important associations were found for the IL6 -174G >C polymorphism.
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Affiliation(s)
- Ana Paula dos Santos Rodrigues
- Health Science Post-Graduation Program, Faculty of Medicine, Universidade Federal de Goiás, 1a Avenida s/n, Setor Universitário, Goiânia, Goiás, Brazil
| | - Lorena Pereira Souza Rosa
- Health Science Post-Graduation Program, Faculty of Medicine, Universidade Federal de Goiás, 1a Avenida s/n, Setor Universitário, Goiânia, Goiás, Brazil
| | - Hugo Delleon da Silva
- Institute of Science and Technology (FIBRA), BR 060-153 KM 97 N° 3400, São João, Anápolis, GO 75000-001, Brazil
- Uni-Anhanguera University Center of Goias, Av. João Candido de Oliveira, 115-Cidade Jardim, Goiânia, GO 74423-115, Brazil
| | - Elisângela de Paula Silveira-Lacerda
- Molecular Biology and Cytogenetics Laboratory, Institute of Biological Sciences, Universidade Federal de Goiás, Av. Esperança, s/n, Campus Samambaia (Campus II), Goiânia, Goiás, Brazil
| | - Erika Aparecida Silveira
- Health Science Post-Graduation Program, Faculty of Medicine, Universidade Federal de Goiás, 1a Avenida s/n, Setor Universitário, Goiânia, Goiás, Brazil
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Ibrahim OM, Gabre AA, Sallam SF, El-Alameey IR, Sabry RN, Galal EM, Tawfik SM, Zarouk WA, Mosaad RM, Ramadan A. Influence of Interleukin-6 (174G/C) Gene Polymorphism on Obesity in Egyptian Children. Open Access Maced J Med Sci 2017; 5:831-835. [PMID: 29362605 PMCID: PMC5771281 DOI: 10.3889/oamjms.2017.175] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2017] [Revised: 09/06/2017] [Accepted: 09/07/2017] [Indexed: 12/16/2022] Open
Abstract
BACKGROUND: Obesity is a multi-factorial chronic disorder. A considerable number of studies have been performed to figure out whether there is an association between obesity and polymorphisms of gene IL-6 (174G/C), but the results are equivocal. AIM: This study aimed to find out whether the IL-6 (174G/C) gene was associated with the risk of developing obesity in Egyptian children. SUBJECTS AND METHODS: The study included 149 children and adolescents with age ranged between 9.5 – 18 years. Eighty-five of them were obese which BMIZ-score is > 2, and sixty-four children with BMIZ-score ≤ 2 served as control group. Serum level of IL-6 and genetic analysis for IL-6 (174G/C) gene polymorphism were done. RESULTS: Obese children had significantly higher serum levels of IL-6 as compared to those of control children (P = 0.003). A high percentage of IL-6 polymorphism GC was found in obese subjects (93.7%), while the control group had a higher percentage of IL-6 polymorphism GG (70.6 %). CONCLUSION: Our study showed that carriers of the C allele for the IL-6 (174G/C) polymorphism have higher BMI. As the G174C polymorphism is likely to affect IL-6 expression and its physiological regulation; consequently this polymorphism may affect adiposity.
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Affiliation(s)
- Ola M Ibrahim
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Azza A Gabre
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Sara F Sallam
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Inas R El-Alameey
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Rania N Sabry
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Essam M Galal
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Sawsan M Tawfik
- Child Health Department, Medical Division, National Research Centre, Egypt
| | - Waheba A Zarouk
- Molecular Genetics & Enzymology Department , Human Genetics and Genome Research Division, National Research Centre, Egypt
| | - Rehab M Mosaad
- Molecular Genetics & Enzymology Department , Human Genetics and Genome Research Division, National Research Centre, Egypt
| | - Abeer Ramadan
- Molecular Genetics & Enzymology Department , Human Genetics and Genome Research Division, National Research Centre, Egypt
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Tekcan A, Yigit S, Rustemoglu A, Gurel C, Sahin S, Tasliyurt T. The Investigation of Obesity Susceptibility with IL-4 Gene Intron 3 VNTR and IL-6 Gene -597G/A Polymorphisms in a Turkish Population. INT J HUM GENET 2017. [DOI: 10.1080/09723757.2013.11886219] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Akin Tekcan
- Ondokuz Mayis University, Faculty of Medicine, Samsun, Turkey
| | - Serbulent Yigit
- Gaziosmanpasa University, Faculty of Medicine, Department of Medical Biology, Tokat, Turkey
| | - Aydin Rustemoglu
- Gaziosmanpasa University, Faculty of Medicine, Department of Medical Biology, Tokat, Turkey
| | - Cevik Gurel
- Gaziosmanpasa University, Faculty of Medicine, Department of Medical Biology, Tokat, Turkey
| | - Server Sahin
- Dumlupinar University, Faculty of Medicine, Department of Medical Biology, Kütahya, Turkey
| | - Turker Tasliyurt
- Gaziosmanpasa University, Faculty of Medicine, Department of Internal Medicine, Tokat, Turkey
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11
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Kocher C, Christiansen M, Martin S, Adams C, Wehner P, Gress T, Santanam N. Sexual dimorphism in obesity-related genes in the epicardial fat during aging. J Physiol Biochem 2016; 73:215-224. [PMID: 28012156 DOI: 10.1007/s13105-016-0542-0] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 12/06/2016] [Indexed: 01/07/2023]
Abstract
Aging increases the risk of cardiovascular disease and metabolic syndrome. Alterations in epicardial fat play an important pathophysiological role in coronary artery disease and hypertension. We investigated the impact of normal aging on obesity-related genes in epicardial fat. Sex-specific changes in obesity-related genes with aging in epicardial fat (EF) were determined in young (6 months) and old (30/36 months) female and male, Fischer 344 × Brown Norway hybrid (FBN) rats, using a rat obesity RT2 PCR Array. Circulating sex hormone levels, body and heart weights were determined. Statistical significance was determined using two-tailed Student's t test and Pearson's correlation. Our results revealed sex-specific differences in obesity-related genes with aging. Dramatic changes in the expression profile of obesity-related genes in EF with aging in female, but not in male, FBN rats were observed. The older (30 months) female rats had more significant variations in the abundance of obesity-related genes in the EF compared to that seen in younger female rats or both age groups in male rats. A correlation of changes in obesity-related genes in EF to heart weights was observed in female rats, but not in male rats with aging. No correlation was observed to circulating sex hormone levels. Our findings indicate a dysfunctional EF in female rats with aging compared to male rats. These findings, with further functional validation, might help explain the sex differences in cardiovascular risk and mortality associated with aging observed in humans.
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Affiliation(s)
- Caitlin Kocher
- Department of Pharmacology, Physiology, & Toxicology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Matthew Christiansen
- Department of Pharmacology, Physiology, & Toxicology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Sarah Martin
- Department of Pharmacology, Physiology, & Toxicology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Christopher Adams
- Department of Medicine and Cardiology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Paulette Wehner
- Department of Medicine and Cardiology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Todd Gress
- Department of Medicine and Cardiology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA
| | - Nalini Santanam
- Department of Pharmacology, Physiology, & Toxicology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA.
- Department of Medicine and Cardiology, Joan C Edwards School of Medicine, Marshall University, One John Marshall Dr, Huntington, WV, 25755, USA.
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Azevedo PM, Merriman TR, Topless RK, Wilson NJ, Crengle S, Lennon DR. Association study involving polymorphisms in IL-6, IL-1RA, and CTLA4 genes and rheumatic heart disease in New Zealand population of Māori and Pacific ancestry. Cytokine 2016; 85:201-6. [PMID: 27400406 DOI: 10.1016/j.cyto.2016.06.029] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2016] [Revised: 06/28/2016] [Accepted: 06/30/2016] [Indexed: 12/20/2022]
Abstract
INTRODUCTION Rheumatic fever (RF) incidence among New Zealand (NZ) individuals of Polynesian (Māori and Pacific) ancestry remains among the highest in the world. Polymorphisms in the IL-6, IL1RN, and CTLA4 genes have been associated with RF, and their products are modulated by new medications. Confirmation of these previous associations could help guide clinical approaches. We aimed to test IL-6, IL-1RA (IL1RN), and CTLA4 functional SNPs in 204 rheumatic heart disease (RHD) patients and 116 controls of Māori and Pacific ancestry. MATERIAL AND METHOD Self-reported ancestry of the eight great-grandparents defined ancestry of participants. Severity of carditis was classified according to the 2012 World Heart Federation guideline for the echocardiographic diagnosis of RHD. The IL-6 promoter rs1800797, IL1RN rs447713 and CTLA4 rs3087243 SNPs were genotyped by Taqman. Correlations were assessed by logistic regression analysis adjusting for gender and ancestry. RESULTS The IL-6 rs1800797 variant was significantly associated with RHD with carriers of the GG genotype 6.09 (CI 1.23; 30.23) times more likely to develop RHD than the carriers of the AA genotype (P=0.027). No significant associations with RHD were found for the IL1RN rs447713 and CTLA4 rs3087243 SNPs. Patients carrying the G allele (GG plus AG genotype) for the IL1RN rs447713 SNP had 2.36 times (CI 1.00; 5.56) more severe carditis than those without this allele (the AA genotype) (P=0.049). CONCLUSION The IL-6 promoter rs1800797 (-597G/A) SNP may influence susceptibility to RHD of people of Māori and Pacific ancestry living in NZ. The IL1RN rs447713 SNP may influence the severity of carditis in this population.
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Affiliation(s)
- Pedro M Azevedo
- Instituto Israelita de Ensino e Pesquisa Albert Einstein, Hospital Israelita Albert Einstein, Sao Paulo, Brazil.
| | - Tony R Merriman
- Biochemistry Department, University of Otago, Dunedin, New Zealand
| | - Ruth K Topless
- Biochemistry Department, University of Otago, Dunedin, New Zealand
| | - Nigel J Wilson
- Green Lane Paediatric and Congenital Cardiac Services, Starship Children's Hospital, Auckland, New Zealand
| | - Sue Crengle
- University of Auckland, Tomaiora Māori Health Research Centre, Auckland, New Zealand
| | - Diana R Lennon
- Paediatrics, University of Auckland, Auckland, New Zealand
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13
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Baumert P, Lake MJ, Stewart CE, Drust B, Erskine RM. Genetic variation and exercise-induced muscle damage: implications for athletic performance, injury and ageing. Eur J Appl Physiol 2016; 116:1595-625. [PMID: 27294501 PMCID: PMC4983298 DOI: 10.1007/s00421-016-3411-1] [Citation(s) in RCA: 90] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Accepted: 06/03/2016] [Indexed: 02/06/2023]
Abstract
Prolonged unaccustomed exercise involving muscle lengthening (eccentric) actions can result in ultrastructural muscle disruption, impaired excitation-contraction coupling, inflammation and muscle protein degradation. This process is associated with delayed onset muscle soreness and is referred to as exercise-induced muscle damage. Although a certain amount of muscle damage may be necessary for adaptation to occur, excessive damage or inadequate recovery from exercise-induced muscle damage can increase injury risk, particularly in older individuals, who experience more damage and require longer to recover from muscle damaging exercise than younger adults. Furthermore, it is apparent that inter-individual variation exists in the response to exercise-induced muscle damage, and there is evidence that genetic variability may play a key role. Although this area of research is in its infancy, certain gene variations, or polymorphisms have been associated with exercise-induced muscle damage (i.e. individuals with certain genotypes experience greater muscle damage, and require longer recovery, following strenuous exercise). These polymorphisms include ACTN3 (R577X, rs1815739), TNF (-308 G>A, rs1800629), IL6 (-174 G>C, rs1800795), and IGF2 (ApaI, 17200 G>A, rs680). Knowing how someone is likely to respond to a particular type of exercise could help coaches/practitioners individualise the exercise training of their athletes/patients, thus maximising recovery and adaptation, while reducing overload-associated injury risk. The purpose of this review is to provide a critical analysis of the literature concerning gene polymorphisms associated with exercise-induced muscle damage, both in young and older individuals, and to highlight the potential mechanisms underpinning these associations, thus providing a better understanding of exercise-induced muscle damage.
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Affiliation(s)
- Philipp Baumert
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK
| | - Mark J Lake
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK
| | - Claire E Stewart
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK
| | - Barry Drust
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK
| | - Robert M Erskine
- Research Institute for Sport and Exercise Sciences, Liverpool John Moores University, Liverpool, L3 3AF, UK.
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14
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Caminiti C, Armeno M, Mazza CS. Waist-to-height ratio as a marker of low-grade inflammation in obese children and adolescents. J Pediatr Endocrinol Metab 2016; 29:543-51. [PMID: 26887032 DOI: 10.1515/jpem-2014-0526] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/26/2015] [Accepted: 12/07/2015] [Indexed: 01/01/2023]
Abstract
BACKGROUND The epidemic of childhood obesity is associated with early atherosclerosis. Several reports have related this event to low-grade inflammation described in obesity. CRP and IL6 are markers that correlate with adiposity. The waist-to-height ratio (WtHR) is an anthropometric marker associated with insulin resistance and inflammation. The objective of this study was to assess the correlation between WtHR, metabolic complications and pro-inflammatory factors in obese children and adolescents. METHODS Weight, height, waist circumference, glycemia, insulin, CRP, TNF-α and IL-6 were measured in the baseline sample in 280 patients 6-19 years of age with overweight or obesity (OW/OB) and 112 normal-weight controls. Logistic regression was performed using WtHR as an independent variable. p>0.05 STATA11. RESULTS Mean WtHR was 0.6±0.06 in OW/OB and 0.43±0.02 in controls (p<0.01). WtHR was increased in 93% of the OW/OB vs. 2% of the controls. In the OW/OB inflammatory markers were significantly increased (p<0.01) compared to the controls (CRP 2.2 vs. 0.8; Il-6 2.9 vs. 2.1; and TNF-α 6.2 vs. 5.5). In the WtHR>0.5, insulin resistence and inflammatory markers were significantly increased (p<0.01) compared to the WtHR<0.5 (HOMA 3.4 vs. 1.4; CRP 2.3 vs. 0.6; Il-6 2.9 vs. 2.1; and TNF-α 6.4 vs. 5.55). In logistic regression, a significant independent association was found between WtHR with CRP (OR1.47), IL6 (OR1.60) and TNF-α (OR1.79). CONCLUSIONS Obese children and adolescents have high inflammatory markers that may increase cardiovascular risk. WtHR is associated with low-grade inflammation and may be considered a relevant anthropometric marker in the clinical practice.
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15
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Fonseka TM, Müller DJ, Kennedy SH. Inflammatory Cytokines and Antipsychotic-Induced Weight Gain: Review and Clinical Implications. MOLECULAR NEUROPSYCHIATRY 2016; 2:1-14. [PMID: 27606316 DOI: 10.1159/000441521] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/07/2015] [Accepted: 10/06/2015] [Indexed: 01/07/2023]
Abstract
Antipsychotic medications (APs), particularly second-generation APs, are associated with significant weight gain in schizophrenia patients. Recent evidence suggests that the immune system may contribute to antipsychotic-induced weight gain (AIWG) via AP-mediated alterations of cytokine levels. Antipsychotics with a high propensity for weight gain, such as clozapine and olanzapine, influence the expression of immune genes, and induce changes in serum cytokine levels to ultimately down-regulate neuroinflammation. Since inflammatory cytokines are normally involved in anorexigenic responses, reduced inflammation has been independently shown to mediate changes in feeding behaviours and other metabolic parameters, resulting in obesity. Genetic variation in pro-inflammatory cytokines is also associated with both general obesity and weight change during AP treatment, and thus, may be implicated in the pharmacogenetics of AIWG. At this time, preliminary data support a cytokine-mediated model of AIWG which may have clinical utility in developing more effective metabolic monitoring guidelines and prevention measures. However, further research is still needed to clearly elucidate the validity of this immune model. This article reviews the evidence implicating inflammatory cytokines in AIWG and its potential clinical relevance.
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Affiliation(s)
- Trehani M Fonseka
- Department of Psychiatry, University Health Network, University of Toronto, Toronto, Ont., Canada; Department of Psychiatry, St. Michael's Hospital, University of Toronto, Toronto, Ont., Canada; Pharmacogenetics Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ont., Canada
| | - Daniel J Müller
- Pharmacogenetics Research Clinic, Campbell Family Mental Health Research Institute, Centre for Addiction and Mental Health, University of Toronto, Toronto, Ont., Canada
| | - Sidney H Kennedy
- Department of Psychiatry, University Health Network, University of Toronto, Toronto, Ont., Canada; Department of Psychiatry, St. Michael's Hospital, University of Toronto, Toronto, Ont., Canada
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Burkett KM, Roy-Gagnon MH, Lefebvre JF, Wang C, Fontaine-Bisson B, Dubois L. A Comparison of Statistical Methods for the Discovery of Genetic Risk Factors Using Longitudinal Family Study Designs. Front Immunol 2015; 6:589. [PMID: 26635803 PMCID: PMC4652172 DOI: 10.3389/fimmu.2015.00589] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2015] [Accepted: 11/02/2015] [Indexed: 01/04/2023] Open
Abstract
The etiology of immune-related diseases or traits is often complex, involving many genetic and environmental factors and their interactions. While methodological approaches focusing on an outcome measured at one time point have succeeded in identifying genetic factors involved in immune-related traits, they fail to capture complex disease mechanisms that fluctuate over time. It is increasingly recognized that longitudinal studies, where an outcome is measured at multiple time points, have great potential to shed light on complex disease mechanisms involving genetic factors. However, longitudinal data require specialized statistical methods, especially in family studies where multiple sources of correlation in the data must be modeled. Using simulated data with known genetic effects, we examined the performance of different analytical methods for investigating associations between genetic factors and longitudinal phenotypes in twin data. The simulations were modeled on data from the Québec Newborn Twin Study, an ongoing population-based longitudinal study of twin births with multiple phenotypes, such as cortisol levels and body mass index, collected multiple times in infancy and early childhood and with sequencing data on immune-related genes and pathways. We compared approaches that we classify as (1) family-based methods applied to summaries of the observations over time, (2) longitudinal-based methods with simplifications of the familial correlation, and (3) Bayesian family-based method with simplifications of the temporal correlation. We found that for estimation of the genetic main and interaction effects, all methods gave estimates close to the true values and had similar power. If heritability estimation is desired, approaches of type (1) also provide heritability estimates close to the true value. Our work shows that the simpler approaches are likely adequate to detect genetic effects; however, interpretation of these effects is more challenging.
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Affiliation(s)
- Kelly M Burkett
- Department of Mathematics and Statistics, University of Ottawa , Ottawa, ON , Canada
| | - Marie-Hélène Roy-Gagnon
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa , Ottawa, ON , Canada
| | - Jean-François Lefebvre
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa , Ottawa, ON , Canada
| | - Cheng Wang
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa , Ottawa, ON , Canada
| | | | - Lise Dubois
- School of Epidemiology, Public Health and Preventive Medicine, University of Ottawa , Ottawa, ON , Canada
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Hollensted M, Ahluwalia TS, Have CT, Grarup N, Fonvig CE, Nielsen TRH, Trier C, Paternoster L, Pedersen O, Holm JC, Sørensen TIA, Hansen T. Common variants in LEPR, IL6, AMD1, and NAMPT do not associate with risk of juvenile and childhood obesity in Danes: a case-control study. BMC MEDICAL GENETICS 2015; 16:105. [PMID: 26558825 PMCID: PMC4642628 DOI: 10.1186/s12881-015-0253-3] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Download PDF] [Subscribe] [Scholar Register] [Received: 04/07/2015] [Accepted: 11/09/2015] [Indexed: 01/11/2023]
Abstract
Background Childhood obesity is a highly heritable disorder, for which the underlying genetic architecture is largely unknown. Four common variants involved in inflammatory-adipokine triggering (IL6 rs2069845, LEPR rs1137100, NAMPT rs3801266, and AMD1 rs2796749) have recently been associated with obesity and related traits in Indian children. The current study aimed to examine the effect of these variants on risk of childhood/juvenile onset obesity and on obesity-related quantitative traits in two Danish cohorts. Methods Genotype information was obtained for 1461 young Caucasian men from the Genetics of Overweight Young Adults (GOYA) study (overweight/obese: 739 and normal weight: 722) and the Danish Childhood Obesity Biobank (TDCOB; overweight/obese: 1022 and normal weight: 650). Overweight/obesity was defined as having a body mass index (BMI) ≥25 kg/m2; among children and youths, this cut-off was defined using age and sex-specific cut-offs corresponding to an adult body mass index ≥25 kg/m2. Risk of obesity was assessed using a logistic regression model whereas obesity-related quantitative measures were analyzed using a general linear model (based on z-scores) stratifying on the case status and adjusting for age and gender. Meta-analyses were performed using the fixed effects model. Results No statistically significant association with childhood/juvenile obesity was found for any of the four gene variants among the individual or combined analyses (rs2069845 OR: 0.94 CI: 0.85–1.04; rs1137100 OR: 1.01 CI: 0.90–1.14; rs3801266: 0.96 CI: 0.84–1.10; rs2796749 OR: 1.02 CI: 0.90–1.15; p > 0.05). However, among normal weight children and juvenile men, the LEPR rs1137100 A-allele significantly associated with lower BMI (β = −0.12, p = 0.0026). Conclusions The IL6, LEPR, NAMPT, and AMD1 gene variants previously found to associate among Indian children did not associate with risk of obesity or obesity-related quantitative measures among Caucasian children and juvenile men from Denmark.
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Affiliation(s)
- Mette Hollensted
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark.
| | - Tarunveer S Ahluwalia
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark. .,COPSAC, Copenhagen Prospective Studies on Asthma in Childhood, Herlev and Gentofte Hospital, University of Copenhagen, Ledreborg Allé 34, DK-2820, Copenhagen, Denmark. .,Steno Diabetes Center, Gentofte, Denmark.
| | - Christian Theil Have
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark.
| | - Niels Grarup
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark.
| | - Cilius Esmann Fonvig
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark. .,The Children's Obesity Clinic, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark.
| | - Tenna Ruest Haarmark Nielsen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark. .,The Children's Obesity Clinic, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark.
| | - Cæcilie Trier
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark. .,The Children's Obesity Clinic, Department of Pediatrics, Copenhagen University Hospital Holbæk, Holbæk, Denmark.
| | - Lavinia Paternoster
- MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK.
| | - Oluf Pedersen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark.
| | - Jens-Christian Holm
- MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK.
| | - Thorkild I A Sørensen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark. .,MRC Integrative Epidemiology Unit, School of Social and Community Medicine, University of Bristol, Bristol, UK. .,Institute of Preventive Medicine, Bispebjerg and Frederiksberg Hospital, The Capital Region, Copenhagen, Denmark.
| | - Torben Hansen
- The Novo Nordisk Foundation Center for Basic Metabolic Research, Section of Metabolic Genetics, Faculty of Health and Medical Sciences, University of Copenhagen, DIKU Building, Universitetsparken 1, 2100, Copenhagen, Denmark.
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Raposo I, Torres T. Psoriasis strikes back! Epicardial adipose tissue: Another contributor to the higher cardiovascular risk in psoriasis. REVISTA PORTUGUESA DE CARDIOLOGIA (ENGLISH EDITION) 2015. [DOI: 10.1016/j.repce.2015.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Psoriasis strikes back! Epicardial adipose tissue: another contributor to the higher cardiovascular risk in psoriasis. Rev Port Cardiol 2015; 34:613-6. [PMID: 26417656 DOI: 10.1016/j.repc.2015.04.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2015] [Accepted: 04/08/2015] [Indexed: 11/24/2022] Open
Abstract
For many years psoriasis was considered an inflammatory condition restricted to the skin. However, nowadays it is considered an immune-mediated, systemic inflammatory condition associated with numerous medical comorbidities, particularly cardiometabolic diseases, and overall cardiovascular mortality. Several studies have suggested that psoriasis may be an independent risk factor for atherosclerosis, indicating that psoriasis itself poses an intrinsic risk for cardiovascular disease, probably due to the disease's inflammatory burden. However, other causes beyond systemic inflammation and traditional cardiovascular risk factors may be implicated in cardiovascular disease in psoriasis. Recently, epicardial adipose tissue, an emerging cardiovascular risk factor, has been shown to be increased in psoriasis patients and to be associated with subclinical atherosclerosis, providing another possible link between psoriasis and atherosclerosis. The reason for the increase in epicardial adipose tissue in patients with psoriasis is unknown, but it is probably multifactorial, with genetic, immune-mediated and behavioral factors having a role. Thus, along with the increased prevalence of cardiometabolic risk factors and systemic inflammation in psoriasis, epicardial adipose tissue is probably another important contributor to the higher cardiovascular risk observed in psoriasis.
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de Oliveira R, Moraes TI, Cerda A, Hirata MH, Fajardo CM, Sousa MC, Dorea EL, Bernik MMS, Hirata RDC. ADIPOQ and IL6 variants are associated with a pro-inflammatory status in obeses with cardiometabolic dysfunction. Diabetol Metab Syndr 2015; 7:34. [PMID: 25897330 PMCID: PMC4403938 DOI: 10.1186/s13098-015-0027-2] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/05/2014] [Accepted: 03/23/2015] [Indexed: 02/06/2023] Open
Abstract
BACKGROUND Polymorphisms in genes encoding adiponectin (ADIPOQ) and interleukin-6 (IL6) have been associated with adiposity and obese-related phenotypes. This study investigated the relationship of ADIPOQ and IL6 gene polymorphisms with pro-inflammatory and cardiometabolic markers in obese patients. METHODS Anthropometric and body composition parameters were measured in 249 Brazilian subjects (30 to 68 yr). Metabolic and inflammatory markers and adipokines were analyzed in blood samples. ADIPOQ rs2241766 (45 T > G) and IL6 rs1800795 (-174G > C) polymorphisms were analyzed by real-time PCR and PCR-RFLP, respectively. RESULTS Type 2 diabetes, hypertension, dyslipidemia and increased values of waist circumference, body fat, leptin, fibrinogen, IL-1β, hsCRP and TNFα were related to obesity (p < 0.05). Multiple linear regression analysis showed a positive correlation between BMI and waist circumference, body fat, leptin, fibrinogen, PAI-1, IL-1β, hsCRP and TNFα values (p < 0.001) but not with adiponectin. Obese group had altered metabolic status, resistance to leptin and insulin, and atherogenic and pro-inflammatory profiles. ADIPOQ and IL6 variants were not directely related to obesity, leptin resistance or alterations in cardiometabolic markers. Individuals carrying ADIPOQ 45G allele (TG + GG genotype) had higher IL-6, IL-1β and TNFα levels than TT genotype carriers (p < 0.05). IL6 -174GG genotype was associated with increased IL-1β levels (p = 0.033). CONCLUSION Obesity is associated with leptin resistance, cardiometabolic alterations and a pro-inflammatory status. Our results are suggestive that ADIPOQ and IL6 polymorphisms contribute to cardiometabolic risk in obese individuals.
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Affiliation(s)
- Raquel de Oliveira
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
| | - Tamiris Invencioni Moraes
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
| | - Alvaro Cerda
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
- />Center of Molecular Biology and Pharmacogenetics, BIOREN-CEGIN, Universidad de La Frontera, Temuco, Chile
| | - Mario Hiroyuki Hirata
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
| | - Cristina Moreno Fajardo
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
| | - Marcela Correia Sousa
- />School of Pharmaceutical Sciences, University Sao Paulo, Av. Prof. Lineu Prestes, 580, 05508-900, Sao Paulo, SP Brazil
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Torres T, Bettencourt N, Ferreira J, Carvalho C, Mendonça D, Pinho-Costa P, Vasconcelos C, Selores M, Silva B. Influence of interleukin-6 gene polymorphisms in epicardial adipose tissue and coronary artery calcification in patients with psoriasis. Br J Dermatol 2014; 172:534-6. [DOI: 10.1111/bjd.13271] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Affiliation(s)
- T. Torres
- Department of Dermatology; Centro Hospitalar do Porto; Porto Portugal
- Unit for Multidisciplinary Investigation in Biomedicine; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
| | - N. Bettencourt
- Department of Cardiology; Centro Hospitalar Gaia/Espinho; Porto Portugal
| | - J. Ferreira
- Immunogenetics Laboratory; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
| | - C. Carvalho
- Immunogenetics Laboratory; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
| | - D. Mendonça
- Department of Population Studies; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
| | - P. Pinho-Costa
- Unit for Multidisciplinary Investigation in Biomedicine; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
- Immunogenetics Laboratory; Instituto Nacional de Saúde Dr. Ricardo Jorge (INSA); Porto Portugal
| | - C. Vasconcelos
- Unit for Multidisciplinary Investigation in Biomedicine; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
- Department of Clinical Immunology; Centro Hospitalar do Porto; Porto Portugal
| | - M. Selores
- Department of Dermatology; Centro Hospitalar do Porto; Porto Portugal
| | - B. Silva
- Unit for Multidisciplinary Investigation in Biomedicine; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
- Immunogenetics Laboratory; Instituto Ciências Biomédicas Abel Salazar; University of Porto; Porto Portugal
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How Fatty Acids and Common Genetic Variants Together Affect the Inflammation of Adipose Tissue. CURRENT CARDIOVASCULAR RISK REPORTS 2014. [DOI: 10.1007/s12170-014-0411-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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Jones SA, Fraser DJ, Fielding CA, Jones GW. Interleukin-6 in renal disease and therapy. Nephrol Dial Transplant 2014; 30:564-74. [DOI: 10.1093/ndt/gfu233] [Citation(s) in RCA: 54] [Impact Index Per Article: 5.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023] Open
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Joffe YT, van der Merwe L, Evans J, Collins M, Lambert EV, September AV, Goedecke JH. Interleukin-6 gene polymorphisms, dietary fat intake, obesity and serum lipid concentrations in black and white South African women. Nutrients 2014; 6:2436-65. [PMID: 24962479 PMCID: PMC4073161 DOI: 10.3390/nu6062436] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2014] [Revised: 05/13/2014] [Accepted: 05/27/2014] [Indexed: 11/16/2022] Open
Abstract
This study investigated interactions between dietary fat intake and IL-6 polymorphisms on obesity and serum lipids in black and white South African (SA) women. Normal-weight and obese, black and white women underwent measurements of body composition, serum lipids and dietary fat intake, and were genotyped for the IL-6 -174 G>C, IVS3 +281 G>T and IVS4 +869 A>G polymorphisms. In black women the IVS4 +869 G allele was associated with greater adiposity, and with increasing dietary fat intake adiposity increased in the IVS3 +281 GT+GG and IVS4 +869 AA or AG genotypes. In white women, with increasing omega-3 (n-3) intake and decreasing n-6:n-3 ratio, body mass index (BMI) decreased in those with the -174 C allele, IVS3 +281 T allele and IVS4 +869 AG genotype. In the white women, those with the IVS3 +281 T allele had lower triglycerides. Further, with increasing n-3 polyunsaturated fatty acid (PUFA); triglyceride and total cholesterol:high-density lipoprotein cholesterol (T-C:HDL-C) ratio decreased in those with the -174 C allele. In black women, with increasing total fat intake, triglycerides and T-C:HDL-C ratio increased in those with the IVS4 +869 G allele. This study is the first to show that dietary fat intake modulates the relationship between the IL-6 -174 G>C, IVS3 +281 G>T and IVS4 +869 A>G polymorphisms on obesity and serum lipids in black and white SA women.
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Affiliation(s)
- Yael T Joffe
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Lize van der Merwe
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Juliet Evans
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Malcolm Collins
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Estelle V Lambert
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Alison V September
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
| | - Julia H Goedecke
- UCT/MRC Research Unit for Exercise Science and Sports Medicine, Department of Human Biology, University of Cape Town, Cape Town 7505, South Africa.
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Božina T, Sertić J, Lovrić J, Jelaković B, Šimić I, Reiner Ž. Interaction of Genetic Risk Factors Confers Increased Risk for Metabolic Syndrome: The Role of Peroxisome Proliferator-Activated Receptor γ. Genet Test Mol Biomarkers 2014; 18:32-40. [DOI: 10.1089/gtmb.2013.0344] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
Affiliation(s)
- Tamara Božina
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Jadranka Sertić
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, University of Zagreb School of Medicine, Zagreb, Croatia
- Department of Laboratory Diagnostics, University Hospital Center Zagreb, Zagreb, Croatia
| | - Jasna Lovrić
- Department of Medical Chemistry, Biochemistry and Clinical Chemistry, University of Zagreb School of Medicine, Zagreb, Croatia
| | - Bojan Jelaković
- Division of Nephrology and Arterial Hypertension, Department of Internal Medicine, University Hospital Center Zagreb, Zagreb, Croatia
| | - Iveta Šimić
- Division of Metabolic Diseases, Department of Internal Medicine, University Hospital Center Zagreb, Zagreb, Croatia
| | - Željko Reiner
- Division of Metabolic Diseases, Department of Internal Medicine, University Hospital Center Zagreb, Zagreb, Croatia
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Kaditis AG, Gozal D, Khalyfa A, Kheirandish-Gozal L, Capdevila OS, Gourgoulianis K, Alexopoulos EI, Chaidas K, Bhattacharjee R, Kim J, Rodopoulou P, Zintzaras E. Variants in C-reactive protein and IL-6 genes and susceptibility to obstructive sleep apnea in children: a candidate-gene association study in European American and Southeast European populations. Sleep Med 2013; 15:228-35. [PMID: 24380782 DOI: 10.1016/j.sleep.2013.08.795] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/23/2013] [Revised: 08/17/2013] [Accepted: 08/29/2013] [Indexed: 12/13/2022]
Abstract
BACKGROUND Preliminary evidence indicates that variants of the C-reactive protein (CRP) and IL-6 genes might be associated with the presence of obstructive sleep apnea (OSA) in childhood. Thus a candidate-gene association study was conducted to investigate the association of four variants of the CRP gene (1444C/T, -717T/C, 1861C/T, and 1919A/T) and two variants of the IL-6 gene (-174G/C and 597G/A) with OSA in a cohort of European American and Greek children. METHODS The genetic risk effects were estimated based on the odds ratio (OR) of the allele contrast and the generalized odds ratio (ORG), which is a model-free approach. The mode of inheritance was assessed using the degree of dominance index. The impact of haplotypes was also examined. RESULTS In the American population, the allele contrast and the model-free approach produced significant ORs for the CRP 1444C/T variant (OR, 3.82 [95% confidence interval {CI}, 1.91-7.63] and ORG, 4.37 [95% CI, 1.96-9.76]), respectively, and the mode of inheritance was recessiveness of allele T. Significance was also shown for the CRP 1919A/T variant (OR, 2.45 [95% CI, 1.23-4.85] and ORG, 2.76 [95% CI, 1.26-6.03]) with the mode of inheritance being nondominance of allele T. For the IL-6-174G/C variant, there was an indication of recessiveness of allele C. Finally, the IL-6-174C/IL-6 597A haplotype was associated with OSA. In the Greek population, no association was detected for any variant or haplotype. CONCLUSIONS Genetic variation in the IL-6/CRP pathway was associated with increased risk for OSA in European American children and may account for the higher CRP levels in the context of pediatric OSA compared to Greek children.
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Affiliation(s)
- Athanasios G Kaditis
- First Department of Pediatrics, University of Athens, School of Medicine and Aghia Sophia Children's Hospital, Athens, Greece.
| | - David Gozal
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States; Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | - Abdelnaby Khalyfa
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States; Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | - Leila Kheirandish-Gozal
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States; Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | - Oscar Sans Capdevila
- Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | | | | | | | - Rakesh Bhattacharjee
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States; Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | - Jinkwan Kim
- Section of Pediatric Sleep Medicine, Department of Pediatrics, Pritzker School of Medicine, The University of Chicago, Chicago, IL, United States; Division of Pediatric Sleep Medicine and Kosair Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, United States
| | - Paraskevi Rodopoulou
- Department of Biomathematics, University of Thessaly School of Medicine, Larissa, Greece
| | - Elias Zintzaras
- Department of Biomathematics, University of Thessaly School of Medicine, Larissa, Greece; Center for Clinical Evidence Synthesis, The Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, United States
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Roberts CK, Hevener AL, Barnard RJ. Metabolic syndrome and insulin resistance: underlying causes and modification by exercise training. Compr Physiol 2013; 3:1-58. [PMID: 23720280 DOI: 10.1002/cphy.c110062] [Citation(s) in RCA: 270] [Impact Index Per Article: 24.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Metabolic syndrome (MS) is a collection of cardiometabolic risk factors that includes obesity, insulin resistance, hypertension, and dyslipidemia. Although there has been significant debate regarding the criteria and concept of the syndrome, this clustering of risk factors is unequivocally linked to an increased risk of developing type 2 diabetes and cardiovascular disease. Regardless of the true definition, based on current population estimates, nearly 100 million have MS. It is often characterized by insulin resistance, which some have suggested is a major underpinning link between physical inactivity and MS. The purpose of this review is to: (i) provide an overview of the history, causes and clinical aspects of MS, (ii) review the molecular mechanisms of insulin action and the causes of insulin resistance, and (iii) discuss the epidemiological and intervention data on the effects of exercise on MS and insulin sensitivity.
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Affiliation(s)
- Christian K Roberts
- Exercise and Metabolic Disease Research Laboratory, Translational Sciences Section, School of Nursing, University of California at Los Angeles, Los Angeles, California, USA.
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Martinez-Ocaña J, Olivo-Diaz A, Salazar-Dominguez T, Reyes-Gordillo J, Tapia-Aquino C, Martínez-Hernández F, Manjarrez ME, Antonio-Martinez M, Contreras-Molina A, Figueroa-Moreno R, Valdez-Vazquez R, Kawa-Karasik S, Rodríguez-Zulueta P, Flisser A, Maravilla P, Romero-Valdovinos M. Plasma cytokine levels and cytokine gene polymorphisms in Mexican patients during the influenza pandemic A(H1N1)pdm09. J Clin Virol 2013; 58:108-13. [PMID: 23809475 DOI: 10.1016/j.jcv.2013.05.013] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2013] [Revised: 05/06/2013] [Accepted: 05/17/2013] [Indexed: 01/09/2023]
Abstract
BACKGROUND In Mexico, the initial severe cases of the 2009 influenza pandemic virus A (H1N1) [A(H1N1)pdm09] were detected in early March. The immune mechanisms associated with the severe pneumonia caused by infection with this new virus have not been completely elucidated. Polymorphisms in interleukin genes have previously been associated with susceptibility to infectious diseases due to their influence on cytokine production. OBJECTIVES The present case-control study was performed to compare several immunologic and genetic parameters of patients and controls during the initial phase of the pandemic. STUDY DESIGN Sixty-five patients who were hospitalized due to infection with the influenza A(H1N1)pdm09 virus and 46 healthy controls were studied. A hemagglutination inhibition assay (HIA) was performed to measure anti-influenza antibody titers in these subjects. Protein levels of the cytokines interleukin (IL)-4, IL-6, IL-8, IL-10, tumor necrosis factor-α (TNFα), interferon gamma (IFNγ), transforming growth factor beta (TGFβ)1 and TGFβ2 were quantified in plasma. Single nucleotide polymorphisms in IL6, IL10 and TNFα were also assessed. RESULTS Influenza patients had lower antibody titers and produced significantly higher levels of IL-6, IL-10 and TNFα than healthy controls. The frequencies of the TNFα -308G, IL-10 -592C and IL-10 -1082A alleles and the IL10 -1082(A/A) genotype were associated with susceptibility to severe disease, while the haplotypes TNFα AG and IL-10 GTA and GCA were associated with protection from severe disease [P=0.016, OR (CI)=0.11 (0.01-0.96); P=0.0187, OR (CI)=0.34 (0.13-0.85); P=0.013, OR (CI)=0.39 (0.18-0.83)]. CONCLUSIONS This study demonstrates that the influenza A(H1N1)pdm09 patients and healthy controls have different profiles of immune parameters and that there is an association between IL-10 and TNFα polymorphisms and the outcome of this disease.
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The relationship between dietary fatty acids and inflammatory genes on the obese phenotype and serum lipids. Nutrients 2013; 5:1672-705. [PMID: 23698162 PMCID: PMC3708344 DOI: 10.3390/nu5051672] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Revised: 04/07/2013] [Accepted: 04/10/2013] [Indexed: 12/16/2022] Open
Abstract
Obesity, a chronic low-grade inflammatory condition is associated with the development of many comorbidities including dyslipidemia. This review examines interactions between single nucleotide polymorphisms (SNP) in the inflammatory genes tumor necrosis alpha (TNFA) and interleukin-6 (IL-6) and dietary fatty acids, and their relationship with obesity and serum lipid levels. In summary, dietary fatty acids, in particular saturated fatty acids and the omega-3 and omega-6 polyunsaturated fatty acids, impact the expression of the cytokine genes TNFA and IL-6, and alter TNFα and IL-6 production. In addition, sequence variants in these genes have also been shown to alter their gene expression and plasma levels, and are associated with obesity, measures of adiposity and serum lipid concentrations. When interactions between dietary fatty acids and TNFA and IL-6 SNPs on obesity and serum lipid were analyzed, both the quantity and quality of dietary fatty acids modulated the relationship between TNFA and IL-6 SNPs on obesity and serum lipid profiles, thereby impacting the association between phenotype and genotype. Researching these diet–gene interactions more extensively, and understanding the role of ethnicity as a confounder in these relationships, may contribute to a better understanding of the inter-individual variability in the obese phenotype.
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Phillips CM. Nutrigenetics and metabolic disease: current status and implications for personalised nutrition. Nutrients 2013; 5:32-57. [PMID: 23306188 PMCID: PMC3571637 DOI: 10.3390/nu5010032] [Citation(s) in RCA: 91] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2012] [Revised: 12/12/2012] [Accepted: 12/21/2012] [Indexed: 12/11/2022] Open
Abstract
Obesity, particularly central adiposity, is the primary causal factor in the development of insulin resistance, the hallmark of the metabolic syndrome (MetS), a common condition characterized by dyslipidaemia and hypertension, which is associated with increased risk of cardiovascular disease (CVD) and type 2 diabetes (T2DM). Interactions between genetic and environmental factors such as diet and lifestyle, particularly over-nutrition and sedentary behavior, promote the progression and pathogenesis of these polygenic diet-related diseases. Their current prevalence is increasing dramatically to epidemic proportions. Nutrition is probably the most important environmental factor that modulates expression of genes involved in metabolic pathways and the variety of phenotypes associated with obesity, the MetS and T2DM. Furthermore, the health effects of nutrients may be modulated by genetic variants. Nutrigenomics and nutrigenetics require an understanding of nutrition, genetics, biochemistry and a range of “omic” technologies to investigate the complex interaction between genetic and environmental factors relevant to metabolic health and disease. These rapidly developing fields of nutritional science hold much promise in improving nutrition for optimal personal and public health. This review presents the current state of the art in nutrigenetic research illustrating the significance of gene-nutrient interactions in the context of metabolic disease.
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Affiliation(s)
- Catherine M Phillips
- HRB Centre for Diet and Health Research, Department of Epidemiology and Public Health, University College Cork, College Road, Cork, Ireland.
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Interleukin-6 Polymorphisms Are Associated with Obesity and Hyperglycemia in Mexican Adolescents. Arch Med Res 2013; 44:62-8. [DOI: 10.1016/j.arcmed.2012.10.019] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2012] [Accepted: 10/22/2012] [Indexed: 11/23/2022]
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Morales-García G, Falfán-Valencia R, García-Ramírez RA, Camarena Á, Ramirez-Venegas A, Castillejos-López M, Pérez-Rodríguez M, González-Bonilla C, Grajales-Muñíz C, Borja-Aburto V, Mejía-Aranguré JM. Pandemic influenza A/H1N1 virus infection and TNF, LTA, IL1B, IL6, IL8, and CCL polymorphisms in Mexican population: a case-control study. BMC Infect Dis 2012; 12:299. [PMID: 23148654 PMCID: PMC3534505 DOI: 10.1186/1471-2334-12-299] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2012] [Accepted: 11/06/2012] [Indexed: 01/11/2023] Open
Abstract
Background Some patients have a greater response to viral infection than do others having a similar level of viral replication. Hypercytokinemia is the principal immunopathological mechanism that contributes to a severer clinical course in cases of influenza A/H1N1. The benefit produced, or damage caused, by these cytokines in severe disease is not known. The genes that code for these molecules are polymorphic and certain alleles have been associated with susceptibility to various diseases. The objective of the present study was to determine whether there was an association between polymorphisms of TNF, LTA, IL1B, IL6, IL8, and CCL1 and the infection and severity of the illness caused by the pandemic A/H1N1 in Mexico in 2009. Methods Case–control study. The cases were patients confirmed with real time PCR with infection by the A/H1N1 pandemic virus. The controls were patients with infection like to influenza and non-familial healthy contacts of the patients with influenza. Medical history and outcome of the disease was registered. The DNA samples were genotyped for polymorphisms TNF rs361525, rs1800629, and rs1800750; LTA rs909253; IL1B rs16944; IL6 rs1818879; IL8 rs4073; and CCL1 rs2282691. Odds ratio (OR) and the 95% confidence interval (95% CI) were calculated. The logistic regression model was adjusted by age and severity of the illness in cases. Results Infection with the pandemic A/H1N1 virus was associated with the following genotypes: TNF rs361525 AA, OR = 27.00; 95% CI = 3.07–1248.77); LTA rs909253 AG (OR = 4.33, 95% CI = 1.82–10.32); TNF rs1800750 AA (OR = 4.33, 95% CI = 1.48–12.64); additionally, LTA rs909253 AG showed a limited statistically significant association with mortality (p = 0.06, OR = 3.13). Carriers of the TNF rs1800629 GA genotype were associated with high levels of blood urea nitrogen (p = 0.05); those of the TNF rs1800750 AA genotype, with high levels of creatine phosphokinase (p=0.05). The IL1B rs16944 AA genotype was associated with an elevated number of leukocytes (p <0.001) and the IL8 rs4073 AA genotype, with a higher value for PaO2 mm Hg. Conclusion The polymorphisms of genes involved in the inflammatory process contributed to the severity of the clinical behavior of infection by the pandemic influenza A/H1N1 virus.
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Affiliation(s)
- Guadalupe Morales-García
- Coordinación de Investigación en Salud, Instituto Mexicano del Seguro Social (IMSS), Torre Academia Nacional de Medicina 4to piso, Av, Cuauhtémoc 330, 06720 México, DF, México
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Prins JR, Gomez-Lopez N, Robertson SA. Interleukin-6 in pregnancy and gestational disorders. J Reprod Immunol 2012; 95:1-14. [PMID: 22819759 DOI: 10.1016/j.jri.2012.05.004] [Citation(s) in RCA: 191] [Impact Index Per Article: 15.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2011] [Revised: 04/30/2012] [Accepted: 05/11/2012] [Indexed: 12/12/2022]
Abstract
IL6 is a multifunctional cytokine with pivotal roles in the inflammatory response and in directing T cell differentiation in adaptive immunity. IL6 is widely expressed in the female reproductive tract and gestational tissues, and exerts regulatory functions in embryo implantation and placental development, as well as the immune adaptations required to tolerate pregnancy. Here, we summarise the current understanding of how membrane-bound and soluble receptors mediate IL6 signalling to regulate leukocytes and non-haemopoietic cells. We review the published literature regarding the expression and actions of IL6 in the uterus, decidua and placenta, and studies implicating this cytokine in pregnancy disorders. Elevated IL6 is frequently evident in the altered cytokine profiles characteristic of unexplained infertility, recurrent miscarriage, preeclampsia and preterm delivery. Notably, there is compelling evidence indicating altered systemic IL6 trans-signalling in women prone to recurrent miscarriage, with excessive IL6 bioavailability potentially inhibiting generation of CD4+ T regulatory cells required for pregnancy tolerance. Insufficient local IL6 may also contribute to fetal loss, since IL6 expression is reduced in the endometrium of women with recurrent miscarriage, and in the fetal-placental tissue of CBA×DBA/2 mice. Consistent with the role of IL6 in key reproductive events, Il6 null mutant mice exhibit elevated fetal resorption and delayed parturition. Investigation of the association between IL6 signalling components and T cell responses in pregnant women, as well as detailed analysis of the maternal immune response in IL6-deficient mice, is now required to define the mechanisms by which this cytokine exerts influence on reproductive success.
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Affiliation(s)
- Jelmer R Prins
- Research Centre for Reproductive Health, School of Paediatrics and Reproductive Health, University of Adelaide, Adelaide, Australia
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Schéle E, Fekete C, Egri P, Füzesi T, Palkovits M, Keller É, Liposits Z, Gereben B, Karlsson-Lindahl L, Shao R, Jansson JO. Interleukin-6 receptor α is co-localised with melanin-concentrating hormone in human and mouse hypothalamus. J Neuroendocrinol 2012; 24:930-43. [PMID: 22295972 DOI: 10.1111/j.1365-2826.2012.02286.x] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Interleukin (IL)-6 deficient mice develop mature-onset obesity. Furthermore, i.c.v. administration of IL-6 increases energy expenditure, suggesting that IL-6 centrally regulates energy homeostasis. To investigate whether it would be possible for IL-6 to directly influence the energy homeostasis via hypothalamic regulation in humans and rodents, we mapped the distribution of the ligand binding IL-6 receptor α (IL-6Rα) in this brain region. In the human hypothalamus, IL-6Rα-immunoreactivity was detected in perikarya and first-order dendrites of neurones. The IL-6Rα-immunoreactive (-IR) neurones were observed posterior to the level of the interventricular foramen. There, IL-6Rα-IR neurones were located in the lateral hypothalamic, perifornical, dorsal and posterior hypothalamic areas, the hypothalamic dorsomedial nucleus and in the zona incerta. In the caudal part of the hypothalamus, the density of the IL-6Rα-IR neurones gradually increased. Double-labelling immunofluorescent studies demonstrated that IL-6Rα immunoreactivity was localised in the same neurones as the orexigenic neuropeptide, melanin-concentrating hormone (MCH). By contrast, IL-6Rα-immunoreactivity was not observed in the orexin B-IR neurones. To determine whether the observed expression of IL-6Rα is evolutionary conserved, we studied the co-localisation of IL-6Rα with MCH and orexin in the mouse hypothalamus, where IL-6Rα-immunoreactivity was present in numerous MCH-IR and orexin-IR neurones. Our data demonstrate that the MCH neurones of the human hypothalamus, as well as the MCH and orexin neurones of the mouse hypothalamus, contain IL-6Rα. This opens up the possibility that IL-6 influences the energy balance through the MCH neurones in humans, and both MCH and orexin neurones in mice.
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Affiliation(s)
- E Schéle
- Institute of Neuroscience and Physiology/Endocrinology, The Sahlgrenska Academy at Gothenburg University, Gothenburg, Sweden
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Benrick A, Wallenius V, Asterholm IW. Interleukin-6 mediates exercise-induced increase in insulin sensitivity in mice. Exp Physiol 2012; 97:1224-35. [PMID: 22523382 DOI: 10.1113/expphysiol.2012.065508] [Citation(s) in RCA: 35] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Interleukin-6 (IL-6) is released from working skeletal muscle during exercise. We investigated the acute and the long-term beneficial effects of IL-6 on exercise-induced glucose uptake in skeletal muscle and insulin sensitivity. The acute effect on exercise-induced glucose uptake was measured in IL-6-deficient (IL-6(-/-)) mice and wild-type control animals using a tracer technique. There was no difference in serum disappearance of (3)[H]2-deoxyglucose after a single bout of exercise between IL-6(-/-) and wild-type mice (13565 ± 426 versus 14343 ± 1309 d.p.m. min ml(-1), P = 0.5). The glucose uptake rate in the extensor digitorum longus muscle was, however, lower in IL-6(-/-) compared with wild-type mice (398 ± 44 versus 657 ± 41 nmol g(-1) min(-1), P < 0.01). In a long-term study, we monitored insulin sensitivity, serum retinol-binding protein-4 (RBP-4) levels, running activity, food intake, body weight and body composition in IL-6(-/-) and wild-type mice on a high-fat diet (HFD), with or without access to running wheels. In sedentary IL-6(-/-) and wild-type mice, the HFD decreased insulin sensitivity (glucose area under the concentration-time curve increased about 20% during an insulin tolerance test, P < 0.05 for both genotypes versus baseline) and led to a 30% increase in serum RBP-4 levels (P < 0.01 for both genotypes versus baseline). Wild-type mice with access to running wheels were protected against these effects of the HFD and maintained their baseline insulin sensitivity and serum RBP-4 levels. In contrast, IL-6(-/-) mice did not benefit from running to the same extent as wild-type animals. The IL-6(-/-) mice with access to running wheels had a similar decrease in insulin sensitivity to their sedentary littermates (glucose area under the concentration-time curve during an insulin tolerance test in runners versus sedentary IL-6(-/-) HFD mice, 312 ± 14 versus 340 ± 22 mmol min l(-1), P = 0.4) and displayed a 14% increase in serum RBP-4 compared with baseline levels (P < 0.01). Our results indicate that endogenous IL-6 contributes to the exercise-induced increase in insulin sensitivity, but plays only a minor role for glucose uptake into skeletal muscle during exercise.
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Affiliation(s)
- Anna Benrick
- Institute of Neuroscience and Physiology/ Endocrinology, The Sahlgrenska Academy at the University of Gothenburg, Medicinaregatan 11, SE-405 30 Gothenburg, Sweden
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Urbanek M, Hayes MG, Lee H, Freathy RM, Lowe LP, Ackerman C, Jafari N, Dyer AR, Cox NJ, Dunger DB, Hattersley AT, Metzger BE, Lowe WL. The role of inflammatory pathway genetic variation on maternal metabolic phenotypes during pregnancy. PLoS One 2012; 7:e32958. [PMID: 22479352 PMCID: PMC3316547 DOI: 10.1371/journal.pone.0032958] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Accepted: 02/08/2012] [Indexed: 02/06/2023] Open
Abstract
Background Since mediators of inflammation are associated with insulin resistance, and the risk of developing diabetes mellitus and gestational diabetes, we hypothesized that genetic variation in members of the inflammatory gene pathway impact glucose levels and related phenotypes in pregnancy. We evaluated this hypothesis by testing for association between genetic variants in 31 inflammatory pathway genes in the Hyperglycemia and Adverse Pregnancy Outcome (HAPO) cohort, a large multiethnic multicenter study designed to address the impact of glycemia less than overt diabetes on pregnancy outcome. Results Fasting, 1-hour, and 2-hour glucose, fasting and 1-hour C-peptide, and HbA1c levels were measured in blood samples obtained from HAPO participants during an oral glucose tolerance test at 24-32 weeks gestation. We tested for association between 458 SNPs mapping to 31 genes in the inflammatory pathway and metabolic phenotypes in 3836 European ancestry and 1713 Thai pregnant women. The strongest evidence for association was observed with TNF alpha and HbA1c (rs1052248; 0.04% increase per allele C; p-value = 4.4×10−5), RETN and fasting plasma glucose (rs1423096; 0.7 mg/dl decrease per allele A; p-value = 1.1×10−4), IL8 and 1 hr plasma glucose (rs2886920; 2.6 mg/dl decrease per allele T; p-value = 1.3×10−4), ADIPOR2 and fasting C-peptide (rs2041139; 0.55 ug/L decrease per allele A; p-value = 1.4×10−4), LEPR and 1-hour C-peptide (rs1171278; 0.62 ug/L decrease per allele T; p-value = 2.4×10−4), and IL6 and 1-hour plasma glucose (rs6954897; −2.29 mg/dl decrease per allele G, p-value = 4.3×10−4). Conclusions Based on the genes surveyed in this study the inflammatory pathway is unlikely to have a strong impact on maternal metabolic phenotypes in pregnancy although variation in individual members of the pathway (e.g. RETN, IL8, ADIPOR2, LEPR, IL6, and TNF alpha,) may contribute to metabolic phenotypes in pregnant women.
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Affiliation(s)
- Margrit Urbanek
- Division of Endocrinology, Metabolism and Molecular Medicine, Northwestern University Feinberg School of Medicine, Chicago, Illinois, United States of America.
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Tabassum R, Mahendran Y, Dwivedi OP, Chauhan G, Ghosh S, Marwaha RK, Tandon N, Bharadwaj D. Common variants of IL6, LEPR, and PBEF1 are associated with obesity in Indian children. Diabetes 2012; 61:626-31. [PMID: 22228719 PMCID: PMC3282821 DOI: 10.2337/db11-1501] [Citation(s) in RCA: 50] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Abstract
The increasing prevalence of obesity in urban Indian children is indicative of an impending crisis of metabolic disorders. Although perturbations in the secretion of adipokines and inflammatory molecules in childhood obesity are well documented, the contribution of common variants of genes encoding them is not well investigated. We assessed the association of 125 common variants from 21 genes, encoding adipocytokines and inflammatory markers in 1,325 urban Indian children (862 normal weight [NW group] and 463 overweight/obese [OW/OB group]) and replicated top loci in 1,843 Indian children (1,399 NW children and 444 OW/OB children). Variants of four genes (PBEF1 [rs3801266] [P = 4.5 × 10(-4)], IL6 [rs2069845] [P = 8.7 × 10(-4)], LEPR [rs1137100] [P = 1.8 × 10(-3)], and IL6R [rs7514452] [P = 2.1 × 10(-3)]) were top signals in the discovery sample. Associations of rs2069845, rs1137100, and rs3801266 were replicated (P = 7.9 × 10(-4), 8.3 × 10(-3), and 0.036, respectively) and corroborated in meta-analysis (P = 2.3 × 10(-6), 3.9 × 10(-5), and 4.3 × 10(-4), respectively) that remained significant after multiple testing corrections. These variants also were associated with quantitative measures of adiposity (weight, BMI, and waist and hip circumferences). Allele dosage analysis of rs2069845, rs1137100, and rs3801266 revealed that children with five to six risk alleles had an approximately four times increased risk of obesity than children with less than two risk alleles (P = 1.2 × 10(-7)). In conclusion, our results demonstrate the association of the common variants of IL6, LEPR, and PBEF1 with obesity in Indian children.
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Affiliation(s)
- Rubina Tabassum
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
| | - Yuvaraj Mahendran
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
| | - Om Prakash Dwivedi
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
| | - Ganesh Chauhan
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
| | - Saurabh Ghosh
- Human Genetics Unit, Indian Statistical Institute, Kolkata, India
| | - Raman K. Marwaha
- Department of Endocrinology and Thyroid Research, Institute of Nuclear Medicine and Allied Sciences, Delhi, India
| | - Nikhil Tandon
- Department of Endocrinology, All India Institute of Medical Sciences, New Delhi, India
- Corresponding authors: Nikhil Tandon, , and Dwaipayan Bharadwaj,
| | - Dwaipayan Bharadwaj
- Genomics and Molecular Medicine Unit, Council of Scientific and Industrial Research, Institute of Genomics and Integrative Biology, Delhi, India
- Corresponding authors: Nikhil Tandon, , and Dwaipayan Bharadwaj,
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Yu Z, Han S, Cao X, Zhu C, Wang X, Guo X. Genetic polymorphisms in adipokine genes and the risk of obesity: a systematic review and meta-analysis. Obesity (Silver Spring) 2012; 20:396-406. [PMID: 21660081 DOI: 10.1038/oby.2011.148] [Citation(s) in RCA: 79] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Polymorphisms in adipokine genes, such as leptin (LEP), leptin receptor (LEPR), resistin (RETN), adiponectin (ADIPOQ), interleukin-1β (IL-1β), IL-6 (IL-6), and tumor necrosis factor-α (TNF-α) may be involved in the development of obesity. We conducted a systematic review of published evidence on the association between different adipokine genes and the risk of obesity. Librarian-designed searches of PubMed and HuGeNet, review of reference lists from published reviews and content expert advice identified potentially eligible studies. The genotyping information and polymorphisms of different adipokine genes, numbers of genotyped cases and controls and frequencies of genotypes were extracted from 48 eligible studies included in this review. Twenty-one polymorphisms each associated with obesity in at least one study were identified. Polymorphisms in the adipokine genes, LEP, LEPR, and RETN were not associated with obesity susceptibility, whereas ADIPOQ G276T (T vs. G: odds ratio (OR), 1.59; 95% confidence interval (CI), 1.39-1.81), IL-1β C3953T (CC vs. CT+TT: OR, 1.61; 95% CI, 1.18-2.20), and TNF-α G308A (GG vs. GA+AA: OR, 1.19; 95% CI, 1.02-1.39) polymorphisms were associated with an increased risk of obesity. The IL-6 G174C polymorphism was also associated obesity when using allelic comparisons, the recessive genetic model and the dominant genetic model with OR (95% CI) of 1.95 (1.37-2.77), 1.44 (1.15-1.80), and 1.36 (1.16-1.59), respectively. No significant evidence of publication bias was present. However, these "null" results were underpowered due to a small pooled sample size, and analysis of additional case-control studies with larger sample sizes should provide further clarifications.
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Affiliation(s)
- Zhangbin Yu
- Department of Pediatrics, Nanjing Maternal and Child Health Hospital, Nanjing Medical University, Nanjing, PR China
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The association between inflammatory biomarkers and metabolically healthy obesity depends of the definition used. Eur J Clin Nutr 2011; 66:426-35. [PMID: 21952696 DOI: 10.1038/ejcn.2011.170] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
BACKGROUND/OBJECTIVES To assess the distribution of interleukin (IL)-1β, IL-6, tumour necrosis factor (TNF)-α and C-reactive protein (CRP) according to the different definitions of metabolically healthy obesity (MHO). SUBJECTS/METHODS A total of 881 obese (body mass index (BMI) > or =30 kg/m2) subjects derived from the population-based CoLaus Study participated in this study. MHO was defined using six sets of criteria including different combinations of waist, blood pressure, total high-density lipoprotein cholesterol or low-density lipoprotein -cholesterol, triglycerides, fasting glucose, homeostasis model, high-sensitivity CRP, and personal history of cardiovascular, respiratory or metabolic diseases. IL-1β, IL-6 and TNF-α were assessed by multiplexed flow cytometric assay. CRP was assessed by immunoassay. RESULTS On bivariate analysis some, but not all, definitions of MHO led to significantly lower levels of IL-6, TNF-α and CRP compared with non-MH obese subjects. Most of these differences became nonsignificant after multivariate analysis. An posteriori analysis showed a statistical power between 9 and 79%, depending on the inflammatory biomarker and MHO definition considered. Further increasing sample size to overweight+obese individuals (BMI > or =25 kg/m2, n=2917) showed metabolically healthy status to be significantly associated with lower levels of CRP, while no association was found for IL-1β. Significantly lower IL-6 and TNF-α levels were also found with some but not all MHO definitions, the differences in IL-6 becoming nonsignificant after adjusting for abdominal obesity or percent body fat. CONCLUSIONS MHO individuals present with decreased levels of CRP and, depending on MHO definition, also with decreased levels in IL-6 and TNF-α. Conversely, no association with IL-1β levels was found.
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Berthold HK, Laudes M, Krone W, Gouni-Berthold I. Association between the interleukin-6 promoter polymorphism -174G/C and serum lipoprotein(a) concentrations in humans. PLoS One 2011; 6:e24719. [PMID: 21935443 PMCID: PMC3173458 DOI: 10.1371/journal.pone.0024719] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2011] [Accepted: 08/17/2011] [Indexed: 12/20/2022] Open
Abstract
BACKGROUND Lipoprotein(a) [Lp(a)] is an independent risk factor for cardiovascular disease. The interleukin-6 (IL-6) receptor antagonist tocilizumab has been shown to lower serum Lp(a) concentrations. We investigated whether the IL-6 single nucleotide polymorphism -174G/C is associated with baseline serum Lp(a) concentrations. METHODOLOGY/PRINCIPAL FINDINGS We divided 2321 subjects from the Lipid Analytic Cologne (LIANCO) cohort into 2 groups, the ones with substantially elevated Lp(a), defined as concentrations ≥60 mg/dl (n = 510), and the ones with Lp(a) <60 mg/dl (n = 1811). The association with the genotypes GG (33.7%), GC (50.75%) and CC (15.55%) was investigated. The GC and the CC genotype were associated with a significantly increased odds ratio of having substantially elevated Lp(a) concentrations (OR = 1.3, 95% CI 1.04 to 1.63, P = 0.02 and OR = 1.44, 95% CI 1.06 to 1.93, P = 0.018). These associations remained significant after adjusting for age, sex, smoking behavior, body mass index, serum lipoproteins, hypertension and diabetes. Of these covariates, only LDL cholesterol was significantly and independently associated with elevated Lp(a) concentrations. CONCLUSIONS/SIGNIFICANCE The IL-6 single nucleotide polymorphism -174G/C is associated with increased odds of having elevated Lp(a). Whether this association plays a role in the Lp(a)-lowering effects of IL-6 receptor antagonists remains to be established.
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Affiliation(s)
- Heiner K Berthold
- Research Group on Geriatrics, Evangelical Geriatrics Center Berlin (EGZB), Charité University Medicine Berlin, Berlin, Germany.
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Dahlman I, Arner P. Genetics of adipose tissue biology. PROGRESS IN MOLECULAR BIOLOGY AND TRANSLATIONAL SCIENCE 2011; 94:39-74. [PMID: 21036322 DOI: 10.1016/b978-0-12-375003-7.00003-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
Adipose tissue morphology and release of free fatty acids, as well as peptide hormones, are believed to contribute to obesity and related metabolic disorders. These adipose tissue phenotypes are influenced by adiposity, but there is also a strong hereditary impact. Polymorphisms in numerous adipose-expressed genes have been evaluated for association with adipocyte and clinical phenotypes. In our opinion, some results are convincing. Thus ADRB2 and GPR74 genes are associated with adipocyte lipolysis, GPR74 also with BMI; PPARG and SREBP1, which promote adipogenesis and lipid storage, are associated with T2D and possible adiposity; ADIPOQ and ARL15 are associated with circulating levels of adiponectin, ARL15 also with coronary heart disease. We anticipate that the use of complementary approaches such as expression profiling and RNAi screening, and studies of additional levels of gene regulation, that is, miRNA and epigenetics, will be important to unravel the genetics of adipose tissue function.
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Body composition changes after laparoscopic adjustable gastric banding: what is the role of -174G>C interleukin-6 promoter gene polymorphism in the therapeutic strategy? Int J Obes (Lond) 2011; 36:369-78. [PMID: 21730965 DOI: 10.1038/ijo.2011.132] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
BACKGROUND There is growing evidence that interleukin-6 (IL-6) is linked to the regulation of fat mass (FM). Our previous data define the common -174G>C IL-6 polymorphism as a marker for 'vulnerable' individuals at risk of age- and obesity-related diseases. An association between -174G>C IL-6 polymorphism and weight loss after bariatric surgery has been demonstrated. OBJECTIVE We investigated the impact of -174G>C IL-6 polymorphism on weight loss, body composition, fluid distribution and cardiometabolic changes in obese subjects, after laparoscopic adjustable gastric banding (LAGB) surgery. DESIGN AND OUTCOME MEASURES A total of 40 obese subjects were studied at baseline and at 6 months follow-up after LAGB surgery. Cardiometabolic and genetic assessment of -174G>C IL-6 polymorphism, anthropometric, body composition and fluid distribution analysis were performed. RESULTS After LAGB surgery, significant reductions in weight (Δ%=-11.66 ± 7.78, P<0.001), body mass index (P<0.001), total and trunk FM (kg, %) (Δ% of total FM=-22.22 ± 12.15, P<0.01), bone mineral density (T-score) (P<0.001), resting metabolic rate (RMR) (P<0.01), and total body water and intracellular water (TBW, ICW) (P<0.05) were observed. At baseline, C(-) carriers of IL-6 polymorphism had a significantly higher RMR (P<0.05), free FM (kg), but less total and trunk FM (%), higher body cell mass (BCM), content of TBW (L) and ECW (extracellular water)/ICW ratio compared with C(+) carriers (P<0.001). After LAGB, C(+) carriers had a significantly stronger reduction of total FM (kg), but lower bone density, compared with C(-) carriers (P<0.05). CONCLUSIONS Beyond the relationship between -174G>C IL-6 polymorphism and body composition, this study provides first evidence about the association of IL-6 variant with fluid distribution, at baseline, and FM and bone density loss in obese subjects at 6 months follow-up after LAGB surgery. LAGB was less effective if the subjects were carrying risk genotypes, C(-) carriers, for obesity, suggesting a role of genetic variations on bariatric surgery outcomes.
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Curti MLR, Jacob P, Borges MC, Rogero MM, Ferreira SRG. Studies of gene variants related to inflammation, oxidative stress, dyslipidemia, and obesity: implications for a nutrigenetic approach. J Obes 2011; 2011:497401. [PMID: 21773006 PMCID: PMC3136190 DOI: 10.1155/2011/497401] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/25/2010] [Revised: 02/15/2011] [Accepted: 03/14/2011] [Indexed: 01/05/2023] Open
Abstract
Obesity is currently considered a serious public health issue due to its strong impact on health, economy, and quality of life. It is considered a chronic low-grade inflammation state and is directly involved in the genesis of metabolic disturbances, such as insulin resistance and dyslipidemia, which are well-known risk factors for cardiovascular disease. Furthermore, there is evidence that genetic variation that predisposes to inflammation and metabolic disturbances could interact with environmental factors, such as diet, modulating individual susceptibility to developing these conditions. This paper aims to review the possible interactions between diet and single-nucleotide polymorphisms (SNPs) in genes implicated on the inflammatory response, lipoprotein metabolism, and oxidative status. Therefore, the impact of genetic variants of the peroxisome proliferator-activated receptor-(PPAR-)gamma, tumor necrosis factor-(TNF-)alpha, interleukin (IL)-1, IL-6, apolipoprotein (Apo) A1, Apo A2, Apo A5, Apo E, glutathione peroxidases 1, 2, and 4, and selenoprotein P exposed to variations on diet composition is described.
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Affiliation(s)
| | | | | | | | - Sandra Roberta G. Ferreira
- Department of Nutrition, School of Public Health, University of São Paulo, Avenida Dr. Arnaldo, 715, 01246-904, São Paulo, SP, Brazil
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Abstract
Although there are indications for modulatory effects of PUFA on associations between SNP and obesity risk, scientific evidence in human subjects is still scarce. The present analyses investigated interaction effects between SNP in candidate genes for obesity and PUFA in erythrocyte membranes on obesity risk. Within the second Bavarian Food Consumption Survey (cross-sectional, population-based), 568 adults provided blood samples. Fatty acid composition of erythrocyte membranes was analysed by means of GC. Genotyping was performed for twenty-one genes, including cytokines, adipokines, neurotransmitters and transcription factors. In addition, plasma IL-6 concentrations were analysed. For the statistical analysis, a logistic regression model assuming additive genetic effects was chosen. About 20 % of the study participants were classified as obese (BMI ≥ 30 kg/m(2)). Several significant gene-PUFA interactions were found, indicating regulatory effects of PUFA by gene variants of IL-2, IL-6, IL-18, TNF receptor family member 1B and 21, leptin receptor and adiponectin on obesity risk. After stratification by genotype, the strongest effects were found for rs2069779 (IL-2) and all tested PUFA as well as for rs1800795 (IL-6) and linoleic or arachidonic acid. The obesity risk of minor allele carriers significantly decreased with increasing fatty acid content. The genetic PUFA-IL-6 interaction was also reflected in plasma IL-6 concentrations. If replicated in a prospective study with sufficient statistical power, the results would indicate a beneficial effect of high PUFA supply for a substantial proportion of the population with respect to obesity risk.
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Szydlowski M, Buszka A, Mackowski M, Lechniak D, Switonski M. Polymorphism of genes encoding cytokines IL6 and TNF is associated with pig fatness. Livest Sci 2011. [DOI: 10.1016/j.livsci.2010.08.008] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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Genetic polymorphisms in the hypothalamic pathway in relation to subsequent weight change--the DiOGenes study. PLoS One 2011; 6:e17436. [PMID: 21390334 PMCID: PMC3044761 DOI: 10.1371/journal.pone.0017436] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/06/2010] [Accepted: 02/03/2011] [Indexed: 01/12/2023] Open
Abstract
Background Single nucleotide polymorphisms (SNPs) in genes encoding the components involved in the hypothalamic pathway may influence weight gain and dietary factors may modify their effects. Aim We conducted a case-cohort study to investigate the associations of SNPs in candidate genes with weight change during an average of 6.8 years of follow-up and to examine the potential effect modification by glycemic index (GI) and protein intake. Methods and Findings Participants, aged 20–60 years at baseline, came from five European countries. Cases (‘weight gainers’) were selected from the total eligible cohort (n = 50,293) as those with the greatest unexplained annual weight gain (n = 5,584). A random subcohort (n = 6,566) was drawn with the intention to obtain an equal number of cases and noncases (n = 5,507). We genotyped 134 SNPs that captured all common genetic variation across the 15 candidate genes; 123 met the quality control criteria. Each SNP was tested for association with the risk of being a ‘weight gainer’ (logistic regression models) in the case-noncase data and with weight gain (linear regression models) in the random subcohort data. After accounting for multiple testing, none of the SNPs was significantly associated with weight change. Furthermore, we observed no significant effect modification by dietary factors, except for SNP rs7180849 in the neuromedin β gene (NMB). Carriers of the minor allele had a more pronounced weight gain at a higher GI (P = 2×10−7). Conclusions We found no evidence of association between SNPs in the studied hypothalamic genes with weight change. The interaction between GI and NMB SNP rs7180849 needs further confirmation.
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Abstract
It is now recognized that the low-grade inflammation observed with obesity is associated with the development of a wide range of downstream complications. As such, there is considerable interest in elucidating the regulatory mechanisms underlying the production of inflammatory molecules to improve the prevention and treatment of obesity and its co-morbidities. White adipose tissue is no longer considered a passive reservoir for storing lipids, but rather an important organ influencing energy metabolism, insulin sensitivity and inflammation by the secretion of proteins, commonly referred to as adipokines. Dysregulation of several adipokines, such as tumor necrosis factor-alpha (TNF-α), interleukin-6 (IL-6) and adiponectin, contributes to the low-grade inflammation that is a hallmark of obesity. Evidence now suggests that fatty acids represent a class of molecules that can modulate adipokine production, thereby influencing inflammatory status. Although the precise molecular mechanisms by which dietary fats regulate adipokine production remain unclear, recent findings indicate that diet-gene interactions may have an important role in the transcriptional and secretory regulation of adipokines. Single-nucleotide polymorphisms in the genes encoding TNF-α, IL-6 and adiponectin can modify circulating levels of these adipokines and, subsequently, obesity-related phenotypes. This genetic variation can also alter the influence of dietary fatty acids on adipokine production. Therefore, the current review will show that it is paramount to consider both genetic information and dietary fat intake to unravel the inter-individual variability in inflammatory response observed in intervention protocols targeting obesity.
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Affiliation(s)
- C Stryjecki
- Department of Human Health and Nutritional Sciences, University of Guelph, Guelph, Ontario, Canada
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Okada Y, Takahashi A, Ohmiya H, Kumasaka N, Kamatani Y, Hosono N, Tsunoda T, Matsuda K, Tanaka T, Kubo M, Nakamura Y, Yamamoto K, Kamatani N. Genome-wide association study for C-reactive protein levels identified pleiotropic associations in the IL6 locus. Hum Mol Genet 2010; 20:1224-31. [DOI: 10.1093/hmg/ddq551] [Citation(s) in RCA: 70] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
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Dong MH, Bettencourt R, Barrett-Connor E, Loomba R. Alanine aminotransferase decreases with age: the Rancho Bernardo Study. PLoS One 2010; 5:e14254. [PMID: 21170382 PMCID: PMC2999530 DOI: 10.1371/journal.pone.0014254] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/07/2010] [Accepted: 11/09/2010] [Indexed: 12/23/2022] Open
Abstract
Background Serum alanine aminotransferase (ALT) is a marker of liver injury. The 2005 American Gastroenterology Association Future Trends Committee report states that serum ALT levels remain constant with age. This study examines the association between serum ALT and age in a community-dwelling cohort in the United States. Methods A cross-sectional study of 2,364 (54% female) participants aged 30–93 years from the Rancho Bernardo Study cohort who attended a research clinic visit in 1984–87. Demographic, metabolic co-variates, ALT, bilirubin, gamma glutamyl transferase (GGT), albumin, and adiposity signaling biomarkers (leptin, IL-6, adiponectin, ghrelin) were measured. Participants were divided into four-groups based upon age quartile, and multivariable-adjusted least squares of means (LSM) were examined (p for trend <0.05). Results ALT decreased with increasing age, with mean ALT levels (IU/L) of 23, 21, 20, and 17 for those between quartile ages 30–62, 63–71, 72–77, and 78–93 years (p<0.0001). Trends of decreasing LSM ALT with age and the decreasing prevalence of categorically defined elevated serum ALT with age remained robust after adjusting for sex, alcohol use, metabolic syndrome components, and biomarkers of adiposity (p-value <0.0001), and was not materially changed after adjusting for bilirubin, GGT, and albumin. Conclusions ALT levels decrease with age in both men and women independent of metabolic syndrome components, adiposity signaling biomarkers, and other commonly used liver function tests. Further studies are needed to understand the mechanisms responsible for a decline in ALT with age, and to establish the optimal cut-point of normal ALT in the elderly.
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Affiliation(s)
- Mamie H. Dong
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Ricki Bettencourt
- Division of Epidemiology, Department of Family and Preventive Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Elizabeth Barrett-Connor
- Division of Epidemiology, Department of Family and Preventive Medicine, University of California San Diego, La Jolla, California, United States of America
| | - Rohit Loomba
- Division of Gastroenterology, Department of Medicine, University of California San Diego, La Jolla, California, United States of America
- Division of Epidemiology, Department of Family and Preventive Medicine, University of California San Diego, La Jolla, California, United States of America
- * E-mail:
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