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Lupu A, Fotea S, Jechel E, Starcea IM, Ioniuc I, Knieling A, Salaru DL, Sasaran MO, Cirstea O, Revenco N, Mihai CM, Lupu VV, Nedelcu AH. Is oxidative stress - antioxidants imbalance the physiopathogenic core in pediatric obesity? Front Immunol 2024; 15:1394869. [PMID: 39176098 PMCID: PMC11338799 DOI: 10.3389/fimmu.2024.1394869] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2024] [Accepted: 07/23/2024] [Indexed: 08/24/2024] Open
Abstract
Despite the early recognition of obesity as an epidemic with global implications, research on its pathogenesis and therapeutic approach is still on the rise. The literature of the 21st century records an excess weight found in up to 1/3 of children. Both the determining factors and its systemic effects are multiple and variable. Regarding its involvement in the potentiation of cardio-vascular, pulmonary, digestive, metabolic, neuro-psychic or even dermatological diseases, the information is already broadly outlined. The connection between the underlying disease and the associated comorbidities seems to be partially attributable to oxidative stress. In addition to these, and in the light of the recent COVID-19 pandemic, the role played by oxidative stress in the induction, maintenance and potentiation of chronic inflammation among overweight children and adolescents becomes a topic of interest again. Thus, this review's purpose is to update general data on obesity, with an emphasis on the physiopathological mechanisms that underlie it and involve oxidative stress. At the same time, we briefly present the latest principles of pathology diagnosis and management. Among these, we will mainly emphasize the impact played by endogenous and exogenous antioxidants in the evolutionary course of pediatric obesity. In order to achieve our objectives, we will refer to the most recent studies published in the specialized literature.
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Affiliation(s)
- Ancuta Lupu
- Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Silvia Fotea
- Clinical Medical Department, Faculty of Medicine and Pharmacy, “Dunarea de Jos” University, Galati, Romania
| | - Elena Jechel
- Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | | | - Ileana Ioniuc
- Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Anton Knieling
- Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Delia Lidia Salaru
- Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Maria Oana Sasaran
- Pediatrics, “George Emil Palade” University of Medicine, Pharmacy, Science and Technology, Targu Mures, Romania
| | - Olga Cirstea
- Pediatrics, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | - Neli Revenco
- Pediatrics, Nicolae Testemitanu State University of Medicine and Pharmacy, Chisinau, Moldova
| | | | - Vasile Valeriu Lupu
- Pediatrics, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
| | - Alin Horatiu Nedelcu
- Faculty of Medicine, “Grigore T. Popa” University of Medicine and Pharmacy, Iasi, Romania
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Yu J, Qiu J, Zhang Z, Cui X, Guo W, Sheng M, Gao M, Wang D, Xu L, Ma X. Redox Biology in Adipose Tissue Physiology and Obesity. Adv Biol (Weinh) 2023; 7:e2200234. [PMID: 36658733 DOI: 10.1002/adbi.202200234] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2022] [Revised: 10/24/2022] [Indexed: 01/21/2023]
Abstract
Reactive oxygen species (ROS), a by-product of mitochondrial oxidative phosphorylation and cellular metabolism, is vital for cellular survival, proliferation, damage, and senescence. In recent years, studies have shown that ROS levels and redox status in adipose tissue are strongly associated with obesity and metabolic diseases. Although it was previously considered that excessive production of ROS and impairment of antioxidant capability leads to oxidative stress and potentially contributes to increased adiposity, it has become increasingly evident that an adequate amount of ROS is vital for adipocyte differentiation and thermogenesis. In this review, by providing a systematic overview of the recent understanding of the key factors of redox systems, endogenous mechanisms for redox homeostasis, advanced techniques for dynamic redox monitoring, as well as exogenous stimuli for redox production in adipose tissues and obesity, the importance of redox biology in metabolic health is emphasized.
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Affiliation(s)
- Jian Yu
- Department of Endocrinology and Metabolism, Fengxian Central Hospital Affiliated to Southern Medical University, Shanghai, 201499, P. R. China
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Jin Qiu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Zhe Zhang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Xiangdi Cui
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Wenxiu Guo
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Maozheng Sheng
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Mingyuan Gao
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Dongmei Wang
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Lingyan Xu
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
| | - Xinran Ma
- Department of Endocrinology and Metabolism, Fengxian Central Hospital Affiliated to Southern Medical University, Shanghai, 201499, P. R. China
- Shanghai Key Laboratory of Regulatory Biology, Institute of Biomedical Sciences and School of Life Sciences, East China Normal University, Shanghai, 200241, P. R. China
- Chongqing Key Laboratory of Precision Optics, Chongqing Institute of East China Normal University, Chongqing, 401120, P. R. China
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de Lamas C, Kalén A, Anguita-Ruiz A, Pérez-Ferreirós A, Picáns-Leis R, Flores K, Moreno LA, Bueno G, Gil Á, Gil-Campos M, Aguilera CM, Leis R. Progression of metabolic syndrome and associated cardiometabolic risk factors from prepuberty to puberty in children: The PUBMEP study. Front Endocrinol (Lausanne) 2022; 13:1082684. [PMID: 36601007 PMCID: PMC9806164 DOI: 10.3389/fendo.2022.1082684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2022] [Accepted: 11/23/2022] [Indexed: 12/23/2022] Open
Abstract
INTRODUCTION Metabolic syndrome (MetS) is a cluster of clinical and metabolic alterations related to the risk of cardiovascular diseases (CVD). Metabolic changes occurring during puberty, especially in children with overweight and obesity, can influence the risk of developing chronic diseases, especially CVD. METHODS Longitudinal study based on the follow-up until puberty of a cohort of 191 prepubertal Spanish boys and girls without congenital, chronic, or inflammatory diseases: undernutrition: or intake of any drug that could alter blood glucose, blood pressure, or lipid metabolism. The following parameters were used to determine the presence of MetS: obesity, hypertension, hyperglycemia, hypertriglyceridemia, and low HDL-c. RESULTS A total of 75·5% of participants stayed in the same BMI category from prepuberty to puberty, whereas 6·3% increased by at least one category. The prevalence of MetS was 9·1% (prepubertal stage) and 11·9% (pubertal stage). The risk of presenting alterations in puberty for systolic blood pressure (SBP), plasma triacylglycerols, HDL cholesterol (HDL-c), and HOMA-IR was significantly higher in those participants who had the same alterations in prepuberty. MetS prevalence in puberty was predicted by sex and levels of HOMA-IR, BMI-z, and waist circumference in the prepubertal stage, in the whole sample: in puberty, the predictors were levels of HOMA-IR, BMI-z, and diastolic blood pressure in participants with obesity. Two fast-and-frugal decision trees were built to predict the risk of MetS in puberty based on prepuberty HOMA-IR (cutoff 2·5), SBP (cutoff 106 mm of Hg), and TAG (cutoff 53 mg/dl). DISCUSSION Controlling obesity and cardiometabolic risk factors, especially HOMA-IR and blood pressure, in children during the prepubertal stage appears critical to preventing pubertal MetS effectively.
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Affiliation(s)
- Carmela de Lamas
- Unit of Investigation in Human Nutrition, Growth and Development of Galicia (GALINUT), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
- Pediatric Nutrition Research Group, Institute of Sanitary Research of Santiago de Compostela (IDIS), University Clinical Hospital of Santiago - University of Santiago de Compostela (CHUS–USC), Santiago de Compostela, Spain
| | - Anton Kalén
- Unit of Investigation in Human Nutrition, Growth and Development of Galicia (GALINUT), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
- Pediatric Nutrition Research Group, Institute of Sanitary Research of Santiago de Compostela (IDIS), University Clinical Hospital of Santiago - University of Santiago de Compostela (CHUS–USC), Santiago de Compostela, Spain
| | - Augusto Anguita-Ruiz
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology “José Mataix”, Center of Biomedical Research, University of Granada, Armilla, Granada, Spain
- Instituto de Investigación Biosanitaria ibs, Granada, Spain
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- Institute for Global Health (ISGlobal), Barcelona, Spain
| | - Alexandra Pérez-Ferreirós
- Unit of Investigation in Human Nutrition, Growth and Development of Galicia (GALINUT), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
- Pediatric Nutrition Research Group, Institute of Sanitary Research of Santiago de Compostela (IDIS), University Clinical Hospital of Santiago - University of Santiago de Compostela (CHUS–USC), Santiago de Compostela, Spain
| | - Rosaura Picáns-Leis
- Unit of Investigation in Human Nutrition, Growth and Development of Galicia (GALINUT), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
- Pediatric Nutrition Research Group, Institute of Sanitary Research of Santiago de Compostela (IDIS), University Clinical Hospital of Santiago - University of Santiago de Compostela (CHUS–USC), Santiago de Compostela, Spain
- Unit of Pediatric Gastroenterology, Hepatology and Nutrition, Pediatric Service, University Clinical Hospital of Santiago (CHUS), Santiago de Compostela, Spain
| | - Katherine Flores
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- Metabolism and Investigation Unit, Reina Sofia University Hospital, Maimónides Institute for Biomedical Research of Córdoba (IMIBIC), University of Córdoba, Córdoba, Spain
| | - Luis A. Moreno
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- GENUD (Growth, Exercise, NUtrition and Development) Research group, University of Zaragoza, Institute of Sanitary Research of Aragón (IIS Aragón), Zaragoza, Spain
- Agri-food Institute of Aragon (IA2), Zaragoza, Spain
| | - Gloria Bueno
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- GENUD (Growth, Exercise, NUtrition and Development) Research group, University of Zaragoza, Institute of Sanitary Research of Aragón (IIS Aragón), Zaragoza, Spain
- Agri-food Institute of Aragon (IA2), Zaragoza, Spain
- Unit of Pediatric Endocrinology, University Clinical Hospital Lozano Blesa, Zaragoza, Spain
| | - Ángel Gil
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology “José Mataix”, Center of Biomedical Research, University of Granada, Armilla, Granada, Spain
- Instituto de Investigación Biosanitaria ibs, Granada, Spain
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
| | - Mercedes Gil-Campos
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- Metabolism and Investigation Unit, Reina Sofia University Hospital, Maimónides Institute for Biomedical Research of Córdoba (IMIBIC), University of Córdoba, Córdoba, Spain
| | - Concepción M. Aguilera
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology “José Mataix”, Center of Biomedical Research, University of Granada, Armilla, Granada, Spain
- Instituto de Investigación Biosanitaria ibs, Granada, Spain
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- *Correspondence: Concepción M. Aguilera,
| | - Rosaura Leis
- Unit of Investigation in Human Nutrition, Growth and Development of Galicia (GALINUT), University of Santiago de Compostela (USC), Santiago de Compostela, Spain
- Pediatric Nutrition Research Group, Institute of Sanitary Research of Santiago de Compostela (IDIS), University Clinical Hospital of Santiago - University of Santiago de Compostela (CHUS–USC), Santiago de Compostela, Spain
- The Center for Biomedical Research Network Physiopathology of Obesity and Nutrition (CIBEROBN), Institute of Health Carlos III (ISCIII), Madrid, Spain
- Unit of Pediatric Gastroenterology, Hepatology and Nutrition, Pediatric Service, University Clinical Hospital of Santiago (CHUS), Santiago de Compostela, Spain
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Blunted Reducing Power Generation in Erythrocytes Contributes to Oxidative Stress in Prepubertal Obese Children with Insulin Resistance. Antioxidants (Basel) 2021; 10:antiox10020244. [PMID: 33562490 PMCID: PMC7914909 DOI: 10.3390/antiox10020244] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2020] [Revised: 01/29/2021] [Accepted: 02/01/2021] [Indexed: 02/08/2023] Open
Abstract
Childhood obesity, and specifically its metabolic complications, are related to deficient antioxidant capacity and oxidative stress. Erythrocytes are constantly exposed to multiple sources of oxidative stress; hence, they are equipped with powerful antioxidant mechanisms requiring permanent reducing power generation and turnover. Glucose-6-phosphate dehydrogenase (G6PDH) and 6-phosphogluconate dehydrogenase (6PGDH) are two key enzymes on the pentose phosphate pathway. Both enzymes supply reducing power by generating NADPH, which is essential for maintaining the redox balance within the cell and the activity of other antioxidant enzymes. We hypothesized that obese children with insulin resistance would exhibit blunted G6PDH and 6PGDH activities, contributing to their erythrocytes’ redox status imbalances. We studied 15 control and 24 obese prepubertal children, 12 of whom were insulin-resistant according to an oral glucose tolerance test (OGTT). We analyzed erythroid malondialdehyde (MDA) and carbonyl group levels as oxidative stress markers. NADP+/NADPH and GSH/GSSG were measured to determine redox status, and NADPH production by both G6PDH and 6PGDH was assayed spectrophotometrically to characterize pentose phosphate pathway activity. Finally, superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and glutathione reductase (GR) activities were also assessed. As expected, MDA and carbonyl groups levels were higher at baseline and along the OGTT in insulin-resistant children. Both redox indicators showed an imbalance in favor of the oxidized forms along the OGTT in the insulin-resistant obese group. Additionally, the NADPH synthesis, as well as GR activity, were decreased. H2O2 removing enzyme activities were depleted at baseline in both obese groups, although after sugar intake only metabolically healthy obese participants were able to maintain their catalase activity. No change was detected in SOD activity between groups. Our results show that obese children with insulin resistance present higher levels of oxidative damage, blunted capacity to generate reducing power, and hampered function of key NADPH-dependent antioxidant enzymes.
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Common Variants in 22 Genes Regulate Response to Metformin Intervention in Children with Obesity: A Pharmacogenetic Study of a Randomized Controlled Trial. J Clin Med 2019; 8:jcm8091471. [PMID: 31527397 PMCID: PMC6780549 DOI: 10.3390/jcm8091471] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Revised: 09/10/2019] [Accepted: 09/11/2019] [Indexed: 12/19/2022] Open
Abstract
Metformin is a first-line oral antidiabetic agent that has shown additional effects in treating obesity and metabolic syndrome. Inter-individual variability in metformin response could be partially explained by the genetic component. Here, we aimed to test whether common genetic variants can predict the response to metformin intervention in obese children. The study was a multicenter and double-blind randomized controlled trial that was stratified according to sex and pubertal status in 160 children with obesity. Children were randomly assigned to receive either metformin (1g/d) or placebo for six months after meeting the defined inclusion criteria. We conducted a post hoc genotyping study in 124 individuals (59 placebo, 65 treated) comprising finally 231 genetic variants in candidate genes. We provide evidence for 28 common variants as promising pharmacogenetics regulators of metformin response in terms of a wide range of anthropometric and biochemical outcomes, including body mass index (BMI) Z-score, and glucose, lipid, and inflammatory traits. Although no association remained statistically significant after multiple-test correction, our findings support previously reported variants in metformin transporters or targets as well as identify novel and promising loci, such as the ADYC3 and the BDNF genes, with plausible biological relation to the metformin's action mechanism. Trial Registration: Registered on the European Clinical Trials Database (EudraCT, ID: 2010-023061-21) on 14 November 2011 (URL: https://www.clinicaltrialsregister.eu/ctr-search/trial/2010-023061-21/ES).
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Lechuga-Sancho AM, Gallego-Andujar D, Ruiz-Ocaña P, Visiedo FM, Saez-Benito A, Schwarz M, Segundo C, Mateos RM. Obesity induced alterations in redox homeostasis and oxidative stress are present from an early age. PLoS One 2018; 13:e0191547. [PMID: 29370267 PMCID: PMC5784965 DOI: 10.1371/journal.pone.0191547] [Citation(s) in RCA: 40] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2017] [Accepted: 01/08/2018] [Indexed: 12/11/2022] Open
Abstract
Objectives Oxidative stress and inflammation have been postulated as underlying mechanisms for the development of obesity-related insulin resistance. This association however, remains elusive especially in childhood. We sought to investigate this relation by measuring oxidative stress and antioxidant response biomarkers, before and during an oral glucose tolerance test (OGTT), in different biological samples from obese children. Subjects 24 children were recruited for the study, (18 obese and 6 controls). After OGTT, the obese group was subdivided in two, according to whether or not carbohydrate metabolic impairment (Ob.IR+, Ob.IR-; respectively) was found. Different biomarkers were analyzed after fasting (T = 0) and during an OGTT (T = 60 and 120 min). Lipoperoxides were measured in plasma, erythrocytes, and urine; while advanced glycation end products were determined in plasma, and redox status (GSH/GSSG ratio) in erythrocytes. Results We found marked differences in the characterization of the oxidative status in urine and erythrocytes, and in the dynamics of the antioxidant response during OGTT. Specifically, Ob.IR+ children show increased oxidative stress, deficient antioxidant response and a significant imbalance in redox status, in comparison to controls and Ob.IR- children. Conclusion Obese children with insulin resistance show increased levels of oxidative stress biomarkers, and a stunted antioxidant response to an OGTT leading to increased oxidative stress after a single glucose load, as detected in erythrocytes, but not in plasma. We propose erythrocytes as sensors of early and acute changes in oxidative stress associated with insulin resistance in childhood obesity. This is a pilot study, performed with a limited sample size, so data should be interpreted with caution until reproduced.
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Affiliation(s)
- Alfonso M. Lechuga-Sancho
- Research Unit, Puerta del Mar University Hospital, Cadiz, Spain
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
- Department of Child and Mother Health and Radiology, Cadiz University Medical School, Cadiz, Spain
| | | | - Pablo Ruiz-Ocaña
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
| | | | - Ana Saez-Benito
- Clinical Analysis Department, Puerta del Mar University Hospital, Cádiz, Spain
| | - Mónica Schwarz
- “Salus Infirmorum” Faculty of Nursing. Cadiz University, Cadiz, Spain
| | - Carmen Segundo
- “Salus Infirmorum” Faculty of Nursing. Cadiz University, Cadiz, Spain
| | - Rosa M. Mateos
- Research Unit, Puerta del Mar University Hospital, Cadiz, Spain
- Pediatrics Department, Puerta del Mar University Hospital, Cádiz, Spain
- Department of Biotechnology, Biomedicine and Public Health, Cadiz University Medical School, Cadiz, Spain
- * E-mail:
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Hernández-Guerrero C, Parra-Carriedo A, Ruiz-de-Santiago D, Galicia-Castillo O, Buenrostro-Jáuregui M, Díaz-Gutiérrez C. Genetic polymorphisms of antioxidant enzymes CAT and SOD affect the outcome of clinical, biochemical, and anthropometric variables in people with obesity under a dietary intervention. GENES & NUTRITION 2018; 13:1. [PMID: 29339975 PMCID: PMC5759352 DOI: 10.1186/s12263-017-0590-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Subscribe] [Scholar Register] [Received: 08/28/2017] [Accepted: 12/07/2017] [Indexed: 01/16/2023]
Abstract
BACKGROUND Genetic polymorphisms of antioxidant enzymes CAT, GPX, and SOD are involved in the etiology of obesity and its principal comorbidities. The aim of the present study was to analyze the effect of aforementioned SNPs over the output of several variables in people with obesity after a nutritional intervention. The study included 92 Mexican women, which received a dietary intervention by 3 months. Participants were genotyped and stratified into two groups: (1) carriers; mutated homozygous plus heterozygous (CR) and (2) homozygous wild type (WT). A comparison between CR and WT was done in clinical (CV), biochemical (BV), and anthropometric variables (AV), at the beginning and at the end of the intervention. RESULTS Participants (n = 92) showed statistically significant differences (p < 0.05) at the end of the nutritional intervention in several CV, BV, and AV. However, two kinds of responses were observed after genotyping participants: (A) CR and WT showed statistically significant differences (p < 0.05) in several CV, BV, and AV for the SNPs 599C>T GPX1 (rs1050450), - 251A>G SOD1 (rs2070424), and - 262C>T CAT (rs1001179). (B) Only CR showed statistically changes (p < 0.05) in several CV, BV, and AV for the SNPs - 21A>T CAT (rs7943316) and 47C>T SOD2 (rs4880). The dietary intervention effect was statistically significantly between the polymorphisms of 47C>T SOD2 and BMI, SBP, TBARS, total cholesterol, and C-LCL (p < 0.05) and between the polymorphisms of - 21A>T CAT (rs7943316) and SBP, DBP, total cholesterol, and atherogenic index (p < 0.05). CONCLUSION People with obesity display different response in several CV, BV, and AV after a nutritional intervention, depending on the antioxidant genetic background of SOD and CAT enzymes.
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Affiliation(s)
- César Hernández-Guerrero
- Departamento de Salud, Universidad Iberoamericana, Prol. Paseo de la Reforma 880, Col Santa Fe, 01219 México City, Mexico
| | - Alicia Parra-Carriedo
- Departamento de Salud, Universidad Iberoamericana, Prol. Paseo de la Reforma 880, Col Santa Fe, 01219 México City, Mexico
| | - Diana Ruiz-de-Santiago
- Especialidad en Obesidad y Comorbilidades, Universidad Iberoamericana, Ciudad de México, Mexico
| | | | | | - Carmen Díaz-Gutiérrez
- Departamento de Salud, Universidad Iberoamericana, Prol. Paseo de la Reforma 880, Col Santa Fe, 01219 México City, Mexico
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Olza J, Rupérez AI, Gil-Campos M, Leis R, Cañete R, Tojo R, Gil Á, Aguilera CM. Leptin Receptor Gene Variant rs11804091 Is Associated with BMI and Insulin Resistance in Spanish Female Obese Children: A Case-Control Study. Int J Mol Sci 2017; 18:ijms18081690. [PMID: 28771179 PMCID: PMC5578080 DOI: 10.3390/ijms18081690] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/11/2017] [Revised: 07/27/2017] [Accepted: 07/28/2017] [Indexed: 12/28/2022] Open
Abstract
Leptin is an endocrine hormone that has a critical role in body weight homoeostasis and mediates its effects via the leptin receptor (LEPR). Common polymorphisms in the genes coding leptin receptors have been associated with metabolic abnormalities. We assessed the association of 28 LEPR polymorphisms with body mass index (BMI) and their relationship with obesity-related phenotypes, inflammation and cardiovascular disease risk biomarkers. A multicentre case-control study was conducted in 522 children (286 with obesity and 236 with normal-BMI). All anthropometric, metabolic factors and biomarkers were higher in children with obesity except apolipoprotein (Apo)-AI, cholesterol, high-density lipoprotein cholesterol (HDL-c), and adiponectin, which were lower in the obesity group; and glucose, low-density lipoprotein cholesterol (LDL-c), and matrix metalloproteinase-9 that did not differ between groups. We identified the associations between rs11208659, rs11804091, rs10157275, rs9436303 and rs1627238, and BMI in the whole population, as well as the association of rs11804091, rs10157275, and rs1327118 with BMI in the female group, although only the rs11804091 remained associated after Bonferroni correction (p = 0.038). This single nucleotide polymorphisms (SNP) was also associated with insulin (p = 0.004), homeostasis model assessment for insulin resistance (HOMA-IR) (p = 0.006), quantitative insulin sensitivity check index (QUICKI) (p = 0.005) and adiponectin (p = 0.046) after adjusting for age, Tanner stage and BMI. Our results show a sex-specific association between the rs11804091 and obesity suggesting an influence of this SNP on insulin resistance.
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Affiliation(s)
- Josune Olza
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Institute of Nutrition and Food Technology, University of Granada, Av. Del Conocimiento s/n., 18016 Granada, Spain.
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain.
| | - Azahara I Rupérez
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Institute of Nutrition and Food Technology, University of Granada, Av. Del Conocimiento s/n., 18016 Granada, Spain.
| | - Mercedes Gil-Campos
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Paediatric Research and Metabolism Unit, Reina Sofía University Hospital, Maimonides Institute for Biomedical Research (IMIBIC), Av. Menendez Pidal s/n., 14010 Córdoba, Spain.
| | - Rosaura Leis
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Unit of Investigation in Nutrition, Growth and Human Development of Galicia, Paediatric Department, Clinic University Hospital of Santiago, University of Santiago de Compostela, Travesia de Choupana, 15706 Galicia, Spain .
| | - Ramón Cañete
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Paediatric Research and Metabolism Unit, Reina Sofía University Hospital, Maimonides Institute for Biomedical Research (IMIBIC), Av. Menendez Pidal s/n., 14010 Córdoba, Spain.
| | - Rafael Tojo
- Unit of Investigation in Nutrition, Growth and Human Development of Galicia, Paediatric Department, Clinic University Hospital of Santiago, University of Santiago de Compostela, Travesia de Choupana, 15706 Galicia, Spain .
| | - Ángel Gil
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Institute of Nutrition and Food Technology, University of Granada, Av. Del Conocimiento s/n., 18016 Granada, Spain.
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain.
| | - Concepción M Aguilera
- Department of Biochemistry and Molecular Biology II, Faculty of Pharmacy, Institute of Nutrition and Food Technology, University of Granada, Av. Del Conocimiento s/n., 18016 Granada, Spain.
- CIBER Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029 Madrid, Spain.
- Instituto de Investigación Biosanitaria ibs.GRANADA, 18012 Granada, Spain.
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Hernández-Guerrero C, Hernández-Chávez P, Romo-Palafox I, Blanco-Melo G, Parra-Carriedo A, Pérez-Lizaur A. Genetic Polymorphisms in SOD (rs2070424, rs7880) and CAT (rs7943316, rs1001179) Enzymes Are Associated with Increased Body Fat Percentage and Visceral Fat in an Obese Population from Central Mexico. Arch Med Res 2017; 47:331-339. [PMID: 27751366 DOI: 10.1016/j.arcmed.2016.08.007] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Accepted: 08/22/2016] [Indexed: 11/17/2022]
Abstract
BACKGROUND AND AIMS Oxidative disturbance is an important factor involved in the etiology of comorbidities associated with obesity. Genetic polymorphisms such as SOD1 -251A>G, SOD2 47 C>T, CAT -21A>T and CAT -262 C>T have been described to alter the activity of antioxidant enzymes. The aim of the present work was to analyze the association of the mentioned SNPs with obesity and their relationship with anthropometric and clinical variables in this group. METHODS The study included 416 Mexican women (208 normal weight, NW and 208 subjects with obesity, OB). Dietary intake, anthropometric, biochemical and clinical features were evaluated and then analyzed in function of the genotypes. RESULTS The mutated carriers (GA+GG) of SOD -251 were significantly higher in the OB group (0.24) compared to the NW group (0.08). The other SNPs showed no differences compared with control group. When comparing carrier mutated subjects with obesity vs. wild-type obese participants with the SNPs SOD1 -251, SOD2 47 and CAT -262, the carriers showed a significantly (p <0.05) higher value in body fat percentage. Also, carriers of SOD2 47 and CAT-262 showed significantly higher values (p = 0.002) and (p = 0.01), respectively, when visceral fat was compared between groups. Systolic blood pressure was significantly higher (p = 0.02) in carriers of mutated CAT-21. CONCLUSION SOD1 -251A>G is associated with obesity independent of the presence of diabetes or dyslipidemia. Mutated obese carries of SOD1 -251, SOD2 47 and CAT -262 are associated with a higher distribution of fat in comparison with obese wild-type carriers.
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Affiliation(s)
| | | | - Inés Romo-Palafox
- Departamento de Salud, Universidad Iberoamericana, Mexico City, México
| | | | | | - Ana Pérez-Lizaur
- Dirección de Posgrado, Universidad Iberoamericana, Mexico City, México
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11
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Akl MG, Fawzy E, Deif M, Farouk A, Elshorbagy AK. Perturbed adipose tissue hydrogen peroxide metabolism in centrally obese men: Association with insulin resistance. PLoS One 2017; 12:e0177268. [PMID: 28545081 PMCID: PMC5436683 DOI: 10.1371/journal.pone.0177268] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2017] [Accepted: 04/25/2017] [Indexed: 12/31/2022] Open
Abstract
Objective Although adipose tissue hydrogen peroxide (H2O2) and its metabolizing enzymes have been linked to obesity and insulin resistance in animal studies, this relation remains to be evaluated in humans. Methods Non-diabetic men (N = 43, median age, 49 (37, 54 y)) undergoing abdominal surgeries were studied. Participants were classified by body mass index (BMI) into normal-weight (N = 19), or overweight/obese (Ow/Ob; BMI ≥25; N = 24). Centrally obese men were identified by waist-height ratio ≥0.5. H2O2 and activities of superoxide dismutase, catalase and glutathione peroxidase enzymes were assayed in subcutaneous fat samples, and visceral fat (available from N = 33), and their associations with anthropometric parameters, fasting serum lipids, and the homeostasis model of insulin resistance (HOMA-IR) were tested using correlations and multivariate linear regression. Results H2O2 concentrations and catalase activity were increased in visceral fat from Ow/Ob men, compared to normal-weight subjects (+32%, P = 0.038 and +51%, P = 0.043 respectively). Centrally obese subjects had >2-fold higher superoxide dismutase activity (P = 0.005), 46% higher H2O2 (P = 0.028), and 89% higher catalase activity (P = 0.009) in visceral fat, compared to lean subjects. Central obesity did not alter these markers in subcutaneous fat, apart from a 50% increase in catalase, and did not affect glutathione peroxidase in either fat depot. H2O2 in visceral fat positively correlated with insulin resistance (r = 0.40, P = 0.032). Catalase activity in visceral fat was an independent determinant of HOMA-IR, explaining ~18% of the variance (ß = 0.42, P = 0.016), after adjustment for age and BMI. Conclusion These findings suggest that adipose tissue catalase shows compensatory up-regulation in response to obesity-induced H2O2 accumulation, and that perturbed H2O2 metabolism in visceral fat is linked to insulin resistance in obese humans.
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Affiliation(s)
- May G. Akl
- Department of Physiology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
| | - Eman Fawzy
- Department of Physiology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
| | - Maha Deif
- Department of Physiology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
| | - Ayman Farouk
- Department of Clinical and Experimental Surgery, Medical Research Institute, University of Alexandria, Alexandria, Egypt
| | - Amany K. Elshorbagy
- Department of Physiology, Faculty of Medicine, University of Alexandria, Alexandria, Egypt
- * E-mail:
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12
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Spahis S, Borys JM, Levy E. Metabolic Syndrome as a Multifaceted Risk Factor for Oxidative Stress. Antioxid Redox Signal 2017; 26:445-461. [PMID: 27302002 DOI: 10.1089/ars.2016.6756] [Citation(s) in RCA: 83] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
Abstract
SIGNIFICANCE Metabolic syndrome (MetS) is associated with a greater risk of diabetes and cardiovascular diseases. It is estimated that this multifactorial condition affects 20%-30% of the world's population. A detailed understanding of MetS mechanisms is crucial for the development of effective prevention strategies and adequate intervention tools that could curb its increasing prevalence and limit its comorbidities, particularly in younger age groups. With advances in basic redox biology, oxidative stress (OxS) involvement in the complex pathophysiology of MetS has become widely accepted. Nevertheless, its clear association with and causative effects on MetS require further elucidation. Recent Advances: Although a better understanding of the causes, risks, and effects of MetS is essential, studies suggest that oxidant/antioxidant imbalance is a key contributor to this condition. OxS is now understood to be a major underlying mechanism for mitochondrial dysfunction, ectopic lipid accumulation, and gut microbiota impairment. CRITICAL ISSUES Further studies, particularly in the field of translational research, are clearly required to understand and control the production of reactive oxygen species (ROS) levels, especially in the mitochondria, since the various therapeutic trials conducted to date have not targeted this major ROS-generating system, aimed to delay MetS onset, or prevent its progression. FUTURE DIRECTIONS Multiple relevant markers need to be identified to clarify the role of ROS in the etiology of MetS. Future clinical trials should provide important proof of concept for the effectiveness of antioxidants as useful therapeutic approaches to simultaneously counteract mitochondrial OxS, alleviate MetS symptoms, and prevent complications. Antioxid. Redox Signal. 26, 445-461.
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Affiliation(s)
- Schohraya Spahis
- 1 Research Center , Ste-Justine MUHC, Montreal, Canada .,2 Department of Nutrition, Université de Montréal , Montreal, Canada
| | | | - Emile Levy
- 1 Research Center , Ste-Justine MUHC, Montreal, Canada .,2 Department of Nutrition, Université de Montréal , Montreal, Canada .,3 EPODE International Network , Paris, France
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13
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Kim JH, Lee MR, Hong YC. Modification of the association of bisphenol A with abnormal liver function by polymorphisms of oxidative stress-related genes. ENVIRONMENTAL RESEARCH 2016; 147:324-30. [PMID: 26922413 DOI: 10.1016/j.envres.2016.02.026] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2015] [Revised: 01/26/2016] [Accepted: 02/18/2016] [Indexed: 05/22/2023]
Abstract
Some studies suggested oxidative stress as a possible mechanism for the relation between exposure to bisphenol A (BPA) and liver damage. Therefore, we evaluated modification of genetic polymorphisms of cyclooxygenase 2 (COX2 or PTGS2), epoxide hydrolase 1 (EPHX1), catalase (CAT), and superoxide dismutase 2 (SOD2 or MnSOD), which are oxidative stress-related genes, on the relation between exposure to BPA and liver function in the elderly. We assessed the association of visit-to-visit variations in BPA exposure with abnormal liver function by each genotype or haplotype after controlling for age, sex, BMI, alcohol consumption, exercise, urinary cotinine levels, and low density lipoprotein cholesterol using a GLIMMIX model. A significant association of BPA with abnormal liver function was observed only in participants with COX2 GG genotype at rs5277 (odds ratio (OR)=3.04 and p=0.0231), CAT genotype at rs769218 (OR=4.16 and p=0.0356), CAT CT genotype at rs769217 (OR=4.19 and p=0.0348), SOD2 TT genotype at rs4880 (OR=2.59 and p=0.0438), or SOD2 GG genotype at rs2758331 (OR=2.57 and p=0.0457). Moreover, we also found higher OR values in participants with a pair of G-G haplotypes for COX2 (OR=2.81 and p=0.0384), G-C-A haplotype for EPHX1 (OR=4.63 and p=0.0654), A-T haplotype for CAT (OR=4.48 and p=0.0245), or T-G-A haplotype for SOD2 (OR=2.91 and p=0.0491) compared with those with the other pair of haplotypes for each gene. Furthermore, the risk score composed of 4 risky pair of haplotypes showed interactive effect with BPA on abnormal liver function (p=0.0057). Our study results suggest that genetic polymorphisms of COX2, EPHX1, CAT, and SOD2 modify the association of BPA with liver function.
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Affiliation(s)
- Jin Hee Kim
- Department of Environmental Health, Graduate School of Public Health, Seoul National University, Seoul 151-742, Republic of Korea; Department of Bioscience and Bioengineering, Sejong University, Seoul, 05006, Republic of Korea
| | - Mee-Ri Lee
- (c)Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea
| | - Yun-Chul Hong
- (c)Department of Preventive Medicine, Seoul National University College of Medicine, Seoul 110-799, Republic of Korea; (d)Institute of Environmental Medicine, Seoul National University Medical Research Center, Seoul 110-799, Republic of Korea.
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Impact of 3-Amino-1,2,4-Triazole (3-AT)-Derived Increase in Hydrogen Peroxide Levels on Inflammation and Metabolism in Human Differentiated Adipocytes. PLoS One 2016; 11:e0152550. [PMID: 27023799 PMCID: PMC4811533 DOI: 10.1371/journal.pone.0152550] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2015] [Accepted: 03/16/2016] [Indexed: 01/01/2023] Open
Abstract
Obesity is characterized by an excessive accumulation of fat in adipose tissue, which is associated with oxidative stress and chronic inflammation. Excessive H2O2 levels are degraded by catalase (CAT), the activity of which is decreased in obesity. We investigated the effects of inhibition of catalase activity on metabolism and inflammation by incubating human differentiated adipocytes with 10 mM 3-amino-1,2,4-triazole (3-AT) for 24 h. As expected, the treatment decreased CAT activity and increased intracellular H2O2 levels significantly. Glutathione peroxidase (GPX) activity was also reduced, and the gene expression levels of the antioxidant enzymes GPX4 and peroxiredoxins (1, 3 and 5) were inhibited. Interestingly, this occurred along with lower mRNA levels of the transcription factors nuclear factor (erythroid 2-like 2) and forkhead box O, which are involved in redox homeostasis. However, superoxide dismutase activity and expression were increased. Moreover, 3-AT led to nuclear factor kappa-light-chain-enhancer of activated B cells (NF-κB) activation and increased tumor necrosis alpha and interleukin 6 protein and gene expression levels, while lowering peroxisome proliferator-activated receptor gamma (PPARγ) mRNA and protein levels. These alterations were accompanied by an altered glucose and lipid metabolism. Indeed, adipocytes treated with 3-AT showed reduced basal glucose uptake, reduced glucose transporter type 4 gene and protein expression, reduced lipolysis, reduced AMP-activated protein kinase activation and reduced gene expression of lipases. Our results indicate that increased H2O2 levels caused by 3-AT treatment impair the antioxidant defense system, lower PPARγ expression and initiate inflammation, thus affecting glucose and lipid metabolism in human differentiated adipocytes.
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Chotimol P, Saehuan C, Kumphune S. Correlation between cardio-ankle vascular index and biomarkers of oxidative stress. Scandinavian Journal of Clinical and Laboratory Investigation 2016; 76:105-11. [DOI: 10.3109/00365513.2015.1108453] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
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16
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Wang X, Hai C. Redox modulation of adipocyte differentiation: hypothesis of "Redox Chain" and novel insights into intervention of adipogenesis and obesity. Free Radic Biol Med 2015; 89:99-125. [PMID: 26187871 DOI: 10.1016/j.freeradbiomed.2015.07.012] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/29/2015] [Revised: 06/19/2015] [Accepted: 07/08/2015] [Indexed: 02/08/2023]
Abstract
In view of the global prevalence of obesity and obesity-associated disorders, it is important to clearly understand how adipose tissue forms. Accumulating data from various laboratories implicate that redox status is closely associated with energy metabolism. Thus, biochemical regulation of the redox system may be an attractive alternative for the treatment of obesity-related disorders. In this work, we will review the current data detailing the role of the redox system in adipocyte differentiation, as well as identifying areas for further research. The redox system affects adipogenic differentiation in an extensive way. We propose that there is a complex and interactive "redox chain," consisting of a "ROS-generating enzyme chain," "combined antioxidant chain," and "transcription factor chain," which contributes to fine-tune the regulation of ROS level and subsequent biological consequences. The roles of the redox system in adipocyte differentiation are paradoxical. The redox system exerts a "tridimensional" mechanism in the regulation of adipocyte differentiation, including transcriptional, epigenetic, and posttranslational modulations. We suggest that redoxomic techniques should be extensively applied to understand the biological effects of redox alterations in a more integrated way. A stable and standardized "redox index" is urgently needed for the evaluation of the general redox status. Therefore, more effort should be made to establish and maintain a general redox balance rather than to conduct simple prooxidant or antioxidant interventions, which have comprehensive implications.
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Affiliation(s)
- Xin Wang
- Department of Toxicology, Shaanxi Key Lab of Free Radical Biology and Medicine, the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi'an, 710032, China.
| | - Chunxu Hai
- Department of Toxicology, Shaanxi Key Lab of Free Radical Biology and Medicine, the Ministry of Education Key Lab of Hazard Assessment and Control in Special Operational Environment, School of Public Health, Fourth Military Medical University, Xi'an, 710032, China.
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Rupérez AI, Olza J, Gil-Campos M, Leis R, Mesa MD, Tojo R, Cañete R, Gil Á, Aguilera CM. Association of Genetic Polymorphisms for Glutathione Peroxidase Genes with Obesity in Spanish Children. JOURNAL OF NUTRIGENETICS AND NUTRIGENOMICS 2014; 7:130-42. [DOI: 10.1159/000368833] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 10/02/2014] [Indexed: 11/19/2022]
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Rupérez AI, Gil A, Aguilera CM. Genetics of oxidative stress in obesity. Int J Mol Sci 2014; 15:3118-44. [PMID: 24562334 PMCID: PMC3958901 DOI: 10.3390/ijms15023118] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2014] [Revised: 02/12/2014] [Accepted: 02/12/2014] [Indexed: 12/18/2022] Open
Abstract
Obesity is a multifactorial disease characterized by the excessive accumulation of fat in adipose tissue and peripheral organs. Its derived metabolic complications are mediated by the associated oxidative stress, inflammation and hypoxia. Oxidative stress is due to the excessive production of reactive oxygen species or diminished antioxidant defenses. Genetic variants, such as single nucleotide polymorphisms in antioxidant defense system genes, could alter the efficacy of these enzymes and, ultimately, the risk of obesity; thus, studies investigating the role of genetic variations in genes related to oxidative stress could be useful for better understanding the etiology of obesity and its metabolic complications. The lack of existing literature reviews in this field encouraged us to gather the findings from studies focusing on the impact of single nucleotide polymorphisms in antioxidant enzymes, oxidative stress-producing systems and transcription factor genes concerning their association with obesity risk and its phenotypes. In the future, the characterization of these single nucleotide polymorphisms (SNPs) in obese patients could contribute to the development of controlled antioxidant therapies potentially beneficial for the treatment of obesity-derived metabolic complications.
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Affiliation(s)
- Azahara I Rupérez
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Centre for Biomedical Research, University of Granada, 18100 Armilla, Granada, Spain
| | - Angel Gil
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Centre for Biomedical Research, University of Granada, 18100 Armilla, Granada, Spain
| | - Concepción M Aguilera
- Department of Biochemistry and Molecular Biology II, Institute of Nutrition and Food Technology, Centre for Biomedical Research, University of Granada, 18100 Armilla, Granada, Spain.
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