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Tremblay EJ, Tchernof A, Pelletier M, Joanisse DR, Mauriège P. Plasma adiponectin/leptin ratio associates with subcutaneous abdominal and omental adipose tissue characteristics in women. BMC Endocr Disord 2024; 24:39. [PMID: 38481206 PMCID: PMC10938796 DOI: 10.1186/s12902-024-01567-8] [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: 09/14/2023] [Accepted: 03/05/2024] [Indexed: 03/17/2024] Open
Abstract
BACKGROUND A better understanding of adipose tissue (AT) dysfunction, which includes morphological and functional changes such as adipocyte hypertrophy as well as impaired adipogenesis, lipid storage/mobilization, endocrine and inflammatory responses, is needed in the context of obesity. One dimension of AT dysfunction, secretory adiposopathy, often assessed as a low plasma adiponectin (A)/leptin (L) ratio, is commonly observed in obesity. The aim of this study was to examine markers of AT development and metabolism in 67 women of varying age and adiposity (age: 40-62 years; body mass index, BMI: 17-41 kg/m2) according to levels of adiponectinemia, leptinemia or the plasma A/L ratio. METHODS Body composition, regional AT distribution and circulating adipokines were determined. Lipolysis was measured from glycerol release in subcutaneous abdominal (SCABD) and omental (OME) adipocytes under basal, isoproterenol-, forskolin (FSK)- and dibutyryl-cyclic AMP (DcAMP)-stimulated conditions. Adipogenesis (C/EBP-α/β/δ, PPAR-γ2 and SREBP-1c) and lipid metabolism (β2-ARs, HSL, FABP4, LPL and GLUT4) gene expression (RT-qPCR) was assessed in both fat depots. Participants in the upper versus lower tertile of adiponectin, leptin or the A/L ratio were compared. RESULTS Basal lipolysis was similar between groups. Women with a low plasma A/L ratio were characterized by higher adiposity and larger SCABD and OME adipocytes (p<0.01) compared to those with a high ratio. In OME adipocytes, women in the low adiponectinemia tertile showed higher isoproterenol-stimulated lipolysis (0.01 CONCLUSIONS Secretory adiposopathy assessed as the plasma A/L ratio, more so than adiponectin or leptin levels alone, discriminates low and elevated lipolysis in OME and SCABD adipocytes despite similar AT expression of selected genes involved in lipid metabolism.
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Affiliation(s)
- Eve-Julie Tremblay
- École de Nutrition, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, Canada
- Centre de recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (CRIUCPQ), Université Laval, Québec City, Canada
| | - André Tchernof
- École de Nutrition, Faculté des sciences de l'agriculture et de l'alimentation, Université Laval, Québec City, Canada
- Centre de recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (CRIUCPQ), Université Laval, Québec City, Canada
| | - Mélissa Pelletier
- Centre de recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (CRIUCPQ), Université Laval, Québec City, Canada
| | - Denis R Joanisse
- Centre de recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (CRIUCPQ), Université Laval, Québec City, Canada
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec City, Canada
| | - Pascale Mauriège
- Centre de recherche de l'Institut Universitaire de Cardiologie et Pneumologie de Québec (CRIUCPQ), Université Laval, Québec City, Canada.
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec City, Canada.
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Bahadoran Z, Mirmiran P, Ghasemi A. Adipose organ dysfunction and type 2 diabetes: Role of nitric oxide. Biochem Pharmacol 2024; 221:116043. [PMID: 38325496 DOI: 10.1016/j.bcp.2024.116043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2023] [Revised: 01/07/2024] [Accepted: 02/01/2024] [Indexed: 02/09/2024]
Abstract
Adipose organ, historically known as specialized lipid-handling tissue serving as the long-term fat depot, is now appreciated as the largest endocrine organ composed of two main compartments, i.e., subcutaneous and visceral adipose tissue (AT), madding up white and beige/brown adipocytes. Adipose organ dysfunction manifested as maldistribution of the compartments, hypertrophic, hypoxic, inflamed, and insulin-resistant AT, contributes to the development of type 2 diabetes (T2D). Here, we highlight the role of nitric oxide (NO·) in AT (dys)function in relation to developing T2D. The key aspects determining lipid and glucose homeostasis in AT depend on the physiological levels of the NO· produced via endothelial NO· synthases (eNOS). In addition to decreased NO· bioavailability (via decreased expression/activity of eNOS or scavenging NO·), excessive NO· produced by inducible NOS (iNOS) in response to hypoxia and AT inflammation may be a critical interfering factor diverting NO· signaling to the formation of reactive oxygen and nitrogen species, resulting in AT and whole-body metabolic dysfunction. Pharmacological approaches boosting AT-NO· availability at physiological levels (by increasing NO· production and its stability), as well as suppression of iNOS-NO· synthesis, are potential candidates for developing NO·-based therapeutics in T2D.
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Affiliation(s)
- Zahra Bahadoran
- Nutrition and Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Parvin Mirmiran
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition Sciences and Food Technology, National Nutrition and Food Technology Research Institute, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Asghar Ghasemi
- Endocrine Physiology Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran.
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Duangjai A, Phanthurat N, Sajjapong W, Ontawong A, Pengnet S, Yosboonruang A, Jongsomchai K, Thatsanasuwan N. Association of abdominal obesity and systolic blood pressure indices with cardiovascular disease risk prediction among community-dwelling older adults. ELECTRONIC JOURNAL OF GENERAL MEDICINE 2023. [DOI: 10.29333/ejgm/12855] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/21/2023]
Abstract
<b>Background:</b> Excess adiposity is an established risk factor for cardiovascular disease (CVD), therefore the early screening indies with predicted CVD risk is more useful for older adults. The current study evaluated the associations between anthropometric, body composition and dietary indices and elevated 10-year CVD risk in older people.<br />
<b>Methods:</b> This research, which involved 55 to 94-year-olds living in the community. Standard techniques were used to determine anthropometric factors and body composition indicators. The risk prediction chart created by World Health Organization and International Society of Hypertension was used to calculate the CVD risk score. Odds ratio (OR) and 95% confidence interval (CI) were determined.<br />
<b>Results:</b> CVD risk prediction was positively correlated with the anthropometric and body composition parameters. After controlling for confounding variables, the logistic regression analysis revealed that waist circumference (OR=16.34; 95% CI: 7.22, 36.98; <i>p</i><0.001), systolic blood pressure (BP) (OR=9.53; 95% CI: 4.52, 20.07; <i>p</i><0.001), and visceral adipose tissue percentage (OR=5.47; 95% CI: 2.98, 10.01; <i>p</i><0.001) were correlated with cardiovascular risk prediction.<br />
<b>Conclusions:</b> Abdominal obesity and increase of systolic BP were associated to increased risk for CVD. Additionally, a positive association between the risk factors for CVD (%visceral adipose tissue) and diet (cholesterol consumption) was established.
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Affiliation(s)
- Acharaporn Duangjai
- Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Naritsara Phanthurat
- Division of Nutrition and Dietetics, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Wittawas Sajjapong
- Division of Nutrition and Dietetics, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Atcharaporn Ontawong
- Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Sirinat Pengnet
- Division of Physiology, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Atchariya Yosboonruang
- Division of Microbiology, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Kamonwan Jongsomchai
- Division of Anatomy, School of Medical Sciences, University of Phayao, Phayao, THAILAND
| | - Natthaphon Thatsanasuwan
- Division of Nutrition and Dietetics, School of Medical Sciences, University of Phayao, Phayao, THAILAND
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Tremblay EJ, Tchernof A, Pelletier M, Chabot N, Joanisse DR, Mauriège P. Contribution of markers of adiposopathy and adipose cell size in predicting insulin resistance in women of varying age and adiposity. Adipocyte 2022; 11:175-189. [PMID: 35436409 PMCID: PMC9037496 DOI: 10.1080/21623945.2022.2059902] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022] Open
Abstract
Adipose tissue (AT) dysfunctions, such as adipocyte hypertrophy, macrophage infiltration and secretory adiposopathy (low plasma adiponectin/leptin, A/L, ratio), associate with metabolic disorders. However, no study has compared the relative contribution of these markers to cardiometabolic risk in women of varying age and adiposity. Body composition, regional AT distribution, lipid-lipoprotein profile, glucose homeostasis and plasma A and L levels were determined in 67 women (age: 40-62 years; BMI: 17-41 kg/m2). Expression of macrophage infiltration marker CD68 and adipocyte size were measured from subcutaneous abdominal (SCABD) and omental (OME) fat. AT dysfunction markers correlated with most lipid-lipoprotein levels. The A/L ratio was negatively associated with fasting insulinemia and HOMA-IR, while SCABD or OME adipocyte size and SCABD CD68 expression were positively related to these variables. Combination of tertiles of largest adipocyte size and lowest A/L ratio showed the highest HOMA-IR. Multiple regression analyses including these markers and TAG levels revealed that the A/L ratio was the only predictor of fasting insulinemia and HOMA-IR. The contribution of the A/L ratio was superseded by adipose cell size in the model where the latter replaced TAGs. Finally, leptinemia was a better predictor of IR than adipocyte size and the A/L ratio in our participants sample.
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Affiliation(s)
- Eve-Julie Tremblay
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec, Canada
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
| | - André Tchernof
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
- École de Nutrition, Faculté des sciences de l’agriculture et de l’alimentation, Université Laval, Québec, Canada
| | - Mélissa Pelletier
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
| | - Nicolas Chabot
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec, Canada
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
| | - Denis R. Joanisse
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec, Canada
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
| | - Pascale Mauriège
- Département de kinésiologie, Faculté de médecine, Université Laval, Québec, Canada
- Centre de recherche de l’institut Universitaire de cardiologie et pneumologie de Québec (CRIUCPQ), Université Laval, Québec, Canada
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Relationship between the Levels of lncRNA H19 in Plasma and Different Adipose Tissue Depots with Patients’ Response to Bariatric Surgery. Life (Basel) 2022; 12:life12050633. [PMID: 35629301 PMCID: PMC9147957 DOI: 10.3390/life12050633] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/06/2022] [Revised: 04/20/2022] [Accepted: 04/22/2022] [Indexed: 11/17/2022] Open
Abstract
Bariatric surgery represents a widespread approach to treating morbid obesity. The search for biomarkers to identify patients to whom this type of treatment will be most effective is needed. Our aim was to characterize the relationship of levels of lncRNA H19 in plasma and different adipose tissue depots with patients’ response to bariatric surgery. The study includes control subjects, patients with obesity and patients with obesity accompanied by impaired carbohydrate metabolism (ICM). Quantitative analysis of lncRNA H19 levels has been performed using qPCR in plasma and subcutaneous (SAT) and visceral adipose tissue (VAT). Patients with obesity without ICM have higher levels of lncRNA H19 in VAT compared to SAT, and higher levels of lncRNA H19 in SAT compared to SAT of control individuals. One year after the intervention, levels of lncRNA H19 decreased in SAT of patients with obesity without ICM. The preoperative level of lncRNA H19 in VAT demonstrates a positive correlation with excess weight loss and a negative correlation with initial BMI. In conclusion, ICM affects expression of lncRNA H19 in SAT of patients with obesity. The preoperative level of lncRNA H19 in VAT can be used to predict excess weight loss in patients with obesity after bariatric surgery.
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Zachariah JP, Wang Y, Newburger JW, deFerranti SD, Mitchell GF, Vasan RS. Biological Pathways in Adolescent Aortic Stiffness. J Am Heart Assoc 2021; 10:e018419. [PMID: 33641350 PMCID: PMC8174212 DOI: 10.1161/jaha.120.018419] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
Background Aortic stiffening begins in youth and antedates future hypertension. In adults, excess weight, systemic inflammation, dyslipidemia, insulin resistance, neurohormonal activation, and altered adipokines are implicated in the pathogenesis of increased aortic stiffness. In adolescents, we assessed the relations of comprehensive measures of aortic stiffness with body mass index (BMI) and related but distinct circulating biomarkers. Methods and Results A convenience sample of 246 adolescents (mean age, 16±2 years; 45% female, 24% Black, and 43% Hispanic) attending primary care or preventive cardiology clinics at 2 tertiary hospitals was grouped as normal weight (N=98) or excess weight (N=148, defined as BMI ≥age‐ and sex‐referenced 85th percentile). After an overnight fast, participants underwent anthropometry, noninvasive arterial tonometry, and assays for serum lipids, CRP (C‐reactive protein), glucose, insulin, renin, aldosterone, and leptin. We used multivariable linear regression to relate arterial stiffness markers (including carotid‐femoral pulse wave velocity) to BMI z score and a biomarker panel. Carotid‐femoral pulse wave velocity was higher in excess weight compared with normal weight group (5.0±0.7 versus 4.6±0.6 m/s; P<0.01). After multivariable adjustment, carotid‐femoral pulse wave velocity was associated with BMI z score (0.09 [95% CI, 0.01–0.18]; P=0.04) and with low‐density lipoprotein cholesterol (0.26 [95% CI, 0.03–0.50]; P=0.03). Conclusions Higher BMI and low‐density lipoprotein cholesterol were associated with greater aortic stiffness in adolescents. Maintaining optimal BMI and lipid levels may mitigate aortic stiffness.
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Affiliation(s)
- Justin P Zachariah
- Section of Pediatric Cardiology Department of Pediatrics Texas Children's HospitalBaylor College of Medicine Houston TX
| | - Yunfei Wang
- Section of Pediatric Cardiology Department of Pediatrics Texas Children's HospitalBaylor College of Medicine Houston TX
| | - Jane W Newburger
- Department of Cardiology Boston Children's HospitalHarvard Medical School Boston MA
| | - Sarah D deFerranti
- Department of Cardiology Boston Children's HospitalHarvard Medical School Boston MA
| | | | - Ramachandran S Vasan
- Section of Cardiovascular Medicine Department of Medicine Boston University School of Medicine Boston MA.,Department of Epidemiology Boston University School of Public Health and Boston University Center for Computing and Data Sciences Boston MA
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González-Granillo M, Savva C, Li X, Fitch M, Pedrelli M, Hellerstein M, Parini P, Korach-André M, Gustafsson JÅ. ERβ activation in obesity improves whole body metabolism via adipose tissue function and enhanced mitochondria biogenesis. Mol Cell Endocrinol 2019; 479:147-158. [PMID: 30342056 DOI: 10.1016/j.mce.2018.10.007] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/07/2018] [Revised: 08/13/2018] [Accepted: 10/07/2018] [Indexed: 12/17/2022]
Abstract
OBJECTIVE Estrogens play a key role in the distribution of adipose tissue and have their action by binding to both estrogen receptors (ER), α and β. Although ERβ has a role in the energy metabolism, limited data of the physiological mechanism and metabolic response involved in the pharmacological activation of ERβ is available. METHODS For clinical relevance, non-ovariectomized female mice were subjected to high fat diet together with pharmacological (DIP - 4-(2-(3,5-dimethylisoxazol-4-yl)-1H-indol-3-yl)phenol) interventions to ERβ selective activation. The physiological mechanism was assessed in vivo by magnetic resonance imaging and spectroscopy, and oral glucose and intraperitoneal insulin tolerance test before and after DIP treatment. Liver and adipose tissue metabolic response was measured in HFD + vehicle and HFD + DIP by stable isotope, RNA sequencing and protein content. RESULTS HFD-fed females treated with DIP had a tissue-specific response towards ERβ selective activation. The metabolic profile showed an improved fasting glucose level, insulin sensitivity and reduced liver steatosis. CONCLUSIONS Our data demonstrate that selective activation of ERβ exerts a tissue-specific activity which promotes a beneficial effect on whole body metabolic response to obesity.
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Affiliation(s)
- Marcela González-Granillo
- Department of Medicine, Metabolism Unit and KI/AZ Integrated CardioMetabolic Center (ICMC), Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden; Department of Biosciences and Nutrition Huddinge, Karolinska Institutet, Sweden.
| | - Christina Savva
- Department of Medicine, Metabolism Unit and KI/AZ Integrated CardioMetabolic Center (ICMC), Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden; Department of Biosciences and Nutrition Huddinge, Karolinska Institutet, Sweden
| | - Xidan Li
- Department of Medicine, Metabolism Unit and KI/AZ Integrated CardioMetabolic Center (ICMC), Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden
| | - Mark Fitch
- Department of Nutritional Sciences & Toxicology, University of California, Berkeley, USA
| | - Matteo Pedrelli
- Division of Clinical Chemistry, Department of Laboratory Medicine, Karolinska Institutet, Sweden
| | - Marc Hellerstein
- Department of Nutritional Sciences & Toxicology, University of California, Berkeley, USA
| | - Paolo Parini
- Department of Medicine and Department of Laboratory Medicine, Karolinska Institutet, Sweden
| | - Marion Korach-André
- Department of Medicine, Metabolism Unit and KI/AZ Integrated CardioMetabolic Center (ICMC), Karolinska Institutet at Karolinska University Hospital Huddinge, Stockholm, Sweden; Department of Biosciences and Nutrition Huddinge, Karolinska Institutet, Sweden.
| | - Jan-Åke Gustafsson
- Department of Biosciences and Nutrition Huddinge, Karolinska Institutet, Sweden; Department of Biology and Biochemistry, Center for Nuclear Receptors and Cell Signalling, University of Houston, Houston, TX, USA
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Intrauterine growth restriction combined with a maternal high-fat diet increased adiposity and serum corticosterone levels in adult rat offspring. J Dev Orig Health Dis 2018; 9:315-328. [DOI: 10.1017/s2040174418000016] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
AbstractIntrauterine growth restriction (IUGR) and fetal exposure to a maternal high-fat diet (HFD) independently increase the risk of developing obesity in adulthood. Excess glucocorticoids increase obesity. We hypothesized that surgically induced IUGR combined with an HFD would increase adiposity and glucocorticoids more than in non-IUGR offspring combined with the same HFD, findings that would persist despite weaning to a regular diet. Non-IUGR (N) and IUGR (I) rat offspring from dams fed either regular rat chow (R) or an HFD (H) were weaned to either a regular rat chow or an HFD. For non-IUGR and IUGR rats, this study design resulted in three diet groups: offspring from dams fed a regular diet and weaned to a regular diet (NRR and IRR), offspring rats from dams fed an HFD and weaned to a regular diet (NHR and IHR) and offspring from dams fed an HFD and weaned to an HFD (NHH and IHH). Magnetic resonance imaging or fasting visceral and subcutaneous adipose tissue collection occurred at postnatal day 60. IHH male rats had greater adiposity than NHH males, findings that were only partly normalized by weaning to a regular chow. IHH male rats had a 10-fold increase in serum corticosterone levels. IHH female rats had increased adiposity and serum triglycerides. We conclude that IUGR combined with an HFD throughout life increased adiposity, glucocorticoids and triglycerides in a sex-specific manner. Our data suggest that one mechanism through which the perinatal environment programs increased adiposity in IHH male rats may be via increased systemic glucocorticoids.
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Kumar KVSH, Sharma R, Manrai M, Sood AK. Visceral Adipose Tissue as a Risk Factor for Diabetes Mellitus in Patients with Chronic Pancreatitis: A Cross-sectional, Observational Study. Diabetes Ther 2017; 8:1057-1064. [PMID: 28895079 PMCID: PMC5630559 DOI: 10.1007/s13300-017-0304-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2017] [Indexed: 02/07/2023] Open
Abstract
INTRODUCTION Visceral adipose tissue (VAT) is a risk factor for diabetes and we investigated the amount of VAT in patients with chronic pancreatitis (CP). METHODS Serial patients with CP seen between January 2015 and June 2016 were included in this cross-sectional, observational study. The study population was divided into alcoholic CP (group 1; N = 67) and tropical CP (group 2; N = 35). VAT was estimated using bioelectric impedance analysis (BIA) and dual energy X-ray absorptiometry (DEXA) methods. The results were analyzed by appropriate statistical methods. RESULTS The study participants (85 male, 17 female) had a mean (SD) age of 40.8 (12.6) years, CP duration of 3.7 (4.7) years, and body mass index of 22.5 (3.2) kg/m2. Pancreatogenic diabetes was seen in 54 patients and the total body fat percentage was lower in the alcoholic CP group. VAT mass was similar in both the groups (p = 0.8749). CP patients with diabetes had a higher VAT mass (436 vs. 341 g) than those without diabetes (p = 0.0132). DEXA and BIA correlated in estimation of total body fat (p < 0.0001) but not in VAT (p = 0.0922). CONCLUSION VAT is a determinant in the development of diabetes, even in patients with CP. DEXA is a better modality for VAT estimation in comparison to BIA.
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Affiliation(s)
| | - Rahul Sharma
- Department of Gastroenterology, Army Hospital (R&R), Delhi, India
| | - Manish Manrai
- Department of Gastroenterology, Army Hospital (R&R), Delhi, India
| | - A K Sood
- Department of Gastroenterology, Army Hospital (R&R), Delhi, India
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Zachariah JP, Quiroz R, Enserro D, Andersson C, Keaney JF, Sullivan LM, Vasan RS. Association of Parental Obesity and Diabetes Mellitus With Circulating Adipokines in Nonobese Nondiabetic Offspring. J Am Heart Assoc 2017; 6:JAHA.116.004973. [PMID: 28713075 PMCID: PMC5586263 DOI: 10.1161/jaha.116.004973] [Citation(s) in RCA: 7] [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] [Indexed: 11/30/2022]
Abstract
Background Adipokines are implicated in the development of obesity‐related traits. We hypothesized that nonobese participants without diabetes mellitus (DM) whose parents were obese or had DM would have altered circulating adipokines compared with those without parental history of these conditions. Methods and Results Participants in the community‐based Framingham Third Generation cohort who were not obese (body mass index <30) and not diabetic with both parents in the Framingham Offspring cohort were included in this analysis (n=2034, mean age 40 years, 54% women). Circulating concentrations of fetuin A, RBP4 (retinol binding protein 4), FABP4 (fatty acid binding protein 4), leptin, LEP‐R (leptin receptor), and adiponectin were assayed. Parental DM was defined as occurring before age 60 years, and obesity was defined as body mass index ≥30 before age 60 years. General estimating equations were used to compare concentrations of adipokines among participants with 0, 1, or 2 parents affected by obesity or DM (separate analyses for each), adjusting for known correlates of adipokines. Overall, 44% had at least 1 parent who was obese and 15% had parents with DM. Parental obesity was associated with higher serum levels of FABP4 and LEP‐R in their offspring (P=0.02 for both). Parental DM was associated with lower adiponectin but higher RBP4 concentrations in offspring (P≤0.02 for both). Conclusions In our community‐based sample, a parental history of DM or obesity was associated with an altered adipokine profile in nonobese nondiabetic offspring. Additional studies are warranted to evaluate whether such preclinical biomarker alterations presage future risk of disease.
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Affiliation(s)
- Justin P Zachariah
- Section of Pediatric Cardiology, Department of Pediatrics, Texas Children's Hospital Baylor College of Medicine, Houston, TX
| | - Rene Quiroz
- Cardiology Section, Boston University, Boston, MA
| | - Danielle Enserro
- Department of Biostatistics, Boston University School of Public Health, Boston, MA
| | | | - John F Keaney
- Division of Cardiovascular Medicine, Department of Medicine, University of Massachusetts Medical School, Worcester, MA
| | - Lisa M Sullivan
- Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA
| | - Ramachandran S Vasan
- Cardiology Section, Boston University, Boston, MA.,Preventive Medicine Section, Boston University, Boston, MA.,Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA.,Boston University's and the National Heart, Lung, and Blood Institute's Framingham Heart Study, Framingham, MA
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11
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Mazaki-Tovi S, Tarca AL, Vaisbuch E, Kusanovic JP, Than NG, Chaiworapongsa T, Dong Z, Hassan SS, Romero R. Characterization of visceral and subcutaneous adipose tissue transcriptome in pregnant women with and without spontaneous labor at term: implication of alternative splicing in the metabolic adaptations of adipose tissue to parturition. J Perinat Med 2016; 44:813-835. [PMID: 26994472 PMCID: PMC5987212 DOI: 10.1515/jpm-2015-0259] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/27/2015] [Accepted: 10/26/2015] [Indexed: 12/14/2022]
Abstract
OBJECTIVE The aim of this study was to determine gene expression and splicing changes associated with parturition and regions (visceral vs. subcutaneous) of the adipose tissue of pregnant women. STUDY DESIGN The transcriptome of visceral and abdominal subcutaneous adipose tissue from pregnant women at term with (n=15) and without (n=25) spontaneous labor was profiled with the Affymetrix GeneChip Human Exon 1.0 ST array. Overall gene expression changes and the differential exon usage rate were compared between patient groups (unpaired analyses) and adipose tissue regions (paired analyses). Selected genes were tested by quantitative reverse transcription-polymerase chain reaction. RESULTS Four hundred and eighty-two genes were differentially expressed between visceral and subcutaneous fat of pregnant women with spontaneous labor at term (q-value <0.1; fold change >1.5). Biological processes enriched in this comparison included tissue and vasculature development as well as inflammatory and metabolic pathways. Differential splicing was found for 42 genes [q-value <0.1; differences in Finding Isoforms using Robust Multichip Analysis scores >2] between adipose tissue regions of women not in labor. Differential exon usage associated with parturition was found for three genes (LIMS1, HSPA5, and GSTK1) in subcutaneous tissues. CONCLUSION We show for the first time evidence of implication of mRNA splicing and processing machinery in the subcutaneous adipose tissue of women in labor compared to those without labor.
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Affiliation(s)
- Shali Mazaki-Tovi
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel Hashomer, Israel
- Tel Aviv University, Tel Aviv, Israel
| | - Adi L. Tarca
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Computer Science, Wayne State University, Detroit, Michigan, United States of America
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Edi Vaisbuch
- Department of Obstetrics and Gynecology, Kaplan Medical Center, Rehovot, Israel
| | - Juan Pedro Kusanovic
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Research and Innovation in Maternal-Fetal Medicine (CIMAF). Department of Obstetrics and Gynecology, Sótero del Río Hospital, Santiago, Chile
| | - Nandor Gabor Than
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Tinnakorn Chaiworapongsa
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Zhong Dong
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
| | - Sonia S Hassan
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Roberto Romero
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
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Roever LS, Resende ES, Diniz ALD, Penha-Silva N, Veloso FC, Casella-Filho A, Dourado PMM, Chagas ACP. Abdominal Obesity and Association With Atherosclerosis Risk Factors: The Uberlândia Heart Study. Medicine (Baltimore) 2016; 95:e1357. [PMID: 26986094 PMCID: PMC4839875 DOI: 10.1097/md.0000000000001357] [Citation(s) in RCA: 37] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
Abstract
Ectopic visceral fat (VF) and subcutaneous fat (SCF) are associated with cardiovascular risk factors. Gender differences in the correlations of cardiovascular disease risk factors and ectopic fat in the Brazilian population still lacking. Cross-sectional study with 101 volunteers (50.49% men; mean age 56.5 ± 18, range 19-74 years) drawn from the Uberlândia Heart Study underwent ultrasonography assessment of abdominal visceral adipose tissue with convex transducer of 3.5 MHz of frequency. The thickness of VF was ultrasonographically measured by the distance between the inner face of the abdominal muscle and the posterior face of abdominal aorta, 1 cm above the umbilicus. The SCF thickness was measured with a 7.5 MHz linear transducer transversely positioned 1 cm above the umbilical scar. The exams were always performed by the same examiner. Ectopic fat volumes were examined in relation to waist circumference, blood pressure, and metabolic risk factors. The VF was significantly associated with the levels of triglycerides (P < 0.01, r = 0.10), HDL cholesterol (P < 0.005, r = 0.15), total cholesterol (P < 0.01, r = 0.10), waist circumference (P < 0.0001, r = 0.43), systolic blood pressure (P < 0.001, r = 0.41), and diastolic blood pressure (P < 0.001, r = 0.32) in women, and with the levels of triglycerides (P < 0.002, r = 0,14), HDL cholesterol (P < 0.032, r = 0.07), glucose (P < 0.001, r = 0.15), alanine aminotransferase (ALT) (P < 0.008, r = 0.12), gamma-GT (P < 0.001, r = 0.30), waist circumference (P < 0.001, r = 0.52), systolic blood pressure (P < 0.001, r = 0.32), and diastolic blood pressure (P < 0.001, r = 0.26) in men. SCF was significantly associated with the levels of triglycerides (P < 0.01, r = 0.34), LDL cholesterol (P < 0.001, r = 0.36), total cholesterol (P < 0.05, r = 0.36), waist circumference (P < 0.0001, r = 0.62), systolic and diastolic blood pressure (P < 0.05, r = 0.34) in women, and with the waist circumference (P < 0.001, r = 0.065)), and MetS (P < 0.05, r = 0.11) in men. The VF and SCF were correlated with most cardiovascular risk factors in both genders but our findings support the idea that there are gender differences in the correlations between ectopic fat deposition and the cardiovascular risk factors.
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Affiliation(s)
- Leonardo S Roever
- From the Federal University of Uberlândia (LR, ESR, ALDD, NP-S, FCV), Heart Institute (InCor), HCFMUSP, University of São Paulo Medical School, São Paulo (AC-F, PMMD, ACPC), and Faculty of Medicine ABC, Santo André (ACPC), Brazil
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13
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Nam S, Stewart KJ, Dobrosielski DA. Lifestyle Intervention for Sleep Disturbances Among Overweight or Obese Individuals. Behav Sleep Med 2016; 14:343-50. [PMID: 26375410 PMCID: PMC4794423 DOI: 10.1080/15402002.2015.1007992] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Abstract
Little is known about the effect of different lifestyle interventions on sleep disturbances among sedentary obese or overweight persons. We randomized men and women aged 35-65 to 6 months of a weight loss diet (D); or D combined with supervised exercise training D + E. Measurements were self-reported sleep disturbances, the Profile of Mood States questionnaire, BMI, total abdominal subcutaneous and visceral fat by magnetic resonance imaging, and aerobic fitness expressed as VO2peak. The groups did not differ in changes for body weight, abdominal total fat, VO2peak, and sleep disturbances. The novel finding herein is that reduced abdominal subcutaneous fat and depressive symptoms, with either D or D + E were associated with less sleep disturbances.
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Affiliation(s)
- Soohyun Nam
- Yale University School of Nursing, 400 West Campus Dr., Orange, Connecticut 06477
| | - Kerry J. Stewart
- The Johns Hopkins University School of Medicine, Division of Cardiology, 4940 Eastern Avenue, 301 Bldg. Room 2422, Baltimore, Maryland 21205-2110
| | - Devon A. Dobrosielski
- Towson University, Department of Kinesiology, 8000 York Road, Towson, Maryland 21252-0001
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14
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Mazaki-Tovi S, Vaisbuch E, Tarca AL, Kusanovic JP, Than NG, Chaiworapongsa T, Dong Z, Hassan SS, Romero R. Characterization of Visceral and Subcutaneous Adipose Tissue Transcriptome and Biological Pathways in Pregnant and Non-Pregnant Women: Evidence for Pregnancy-Related Regional-Specific Differences in Adipose Tissue. PLoS One 2015; 10:e0143779. [PMID: 26636677 PMCID: PMC4670118 DOI: 10.1371/journal.pone.0143779] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2015] [Accepted: 11/08/2015] [Indexed: 12/13/2022] Open
Abstract
Objective The purpose of this study was to compare the transcriptome of visceral and subcutaneous adipose tissues between pregnant and non-pregnant women. Study Design The transcriptome of paired visceral and abdominal subcutaneous adipose tissues from pregnant women at term and matched non-pregnant women (n = 11) was profiled with the Affymetrix Human Exon 1.0 ST array. Differential expression of selected genes was validated with the use of quantitative reverse transcription–polymerase chain reaction. Results Six hundred forty-four transcripts from 633 known genes were differentially expressed (false discovery rate (FDR) <0.1; fold-change >1.5), while 42 exons from 36 genes showed differential usage (difference in FIRMA scores >2 and FDR<0.1) between the visceral and subcutaneous fat of pregnant women. Fifty-six known genes were differentially expressed between pregnant and non-pregnant subcutaneous fat and three genes in the visceral fat. Enriched biological processes in the subcutaneous adipose tissue of pregnant women were mostly related to inflammation. Conclusion The transcriptome of visceral and subcutaneous fat depots reveals pregnancy-related gene expression and splicing differences in both visceral and subcutaneous adipose tissue. Furthermore, for the first time, alternative splicing in adipose tissue has been associated with regional differences and human parturition.
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Affiliation(s)
- Shali Mazaki-Tovi
- Department of Obstetrics and Gynecology, Sheba Medical Center, Tel Hashomer, Israel
- Tel Aviv University, Tel Aviv, Israel
- * E-mail: (SMT); (RR)
| | - Edi Vaisbuch
- Department of Obstetrics and Gynecology, Kaplan Medical Center, Rehovot, Israel
| | - Adi L. Tarca
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Computer Science, Wayne State University, Detroit, Michigan, United States of America
- Center for Molecular Medicine and Genetics, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Juan Pedro Kusanovic
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, School of Medicine, Pontificia Universidad Católica de Chile, Santiago, Chile
- Center for Research and Innovation in Maternal-Fetal Medicine (CIMAF), Department of Obstetrics and Gynecology, Sótero del Río Hospital, Santiago, Chile
| | - Nandor Gabor Than
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Institute of Enzymology, Research Centre for Natural Sciences, Hungarian Academy of Sciences, Budapest, Hungary
- First Department of Pathology and Experimental Cancer Research, Semmelweis University, Budapest, Hungary
| | - Tinnakorn Chaiworapongsa
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Zhong Dong
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
| | - Sonia S. Hassan
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
| | - Roberto Romero
- Perinatology Research Branch, Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health, Department of Health and Human Services, Bethesda, Maryland, and Detroit, Michigan, United States of America
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan, United States of America
- * E-mail: (SMT); (RR)
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15
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Zachariah JP, Hwang S, Hamburg NM, Benjamin EJ, Larson MG, Levy D, Vita JA, Sullivan LM, Mitchell GF, Vasan RS. Circulating Adipokines and Vascular Function: Cross-Sectional Associations in a Community-Based Cohort. Hypertension 2015; 67:294-300. [PMID: 26628673 DOI: 10.1161/hypertensionaha.115.05949] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2015] [Accepted: 11/06/2015] [Indexed: 12/27/2022]
Abstract
Adipokines may be potential mediators of the association between excess adiposity and vascular dysfunction. We assessed the cross-sectional associations of circulating adipokines with vascular stiffness in a community-based cohort of younger adults. We related circulating concentrations of leptin and leptin receptor, adiponectin, retinol-binding protein 4, and fatty acid-binding protein 4 to vascular stiffness measured by arterial tonometry in 3505 Framingham Third Generation cohort participants free of cardiovascular disease (mean age 40 years, 53% women). Separate regression models estimated the relations of each adipokine to mean arterial pressure and aortic stiffness, as carotid femoral pulse wave velocity, adjusting for age, sex, smoking, heart rate, height, antihypertensive treatment, total and high-density lipoprotein cholesterol, diabetes mellitus, alcohol consumption, estimated glomerular filtration rate, glucose, and C-reactive protein. Models evaluating aortic stiffness also were adjusted for mean arterial pressure. Mean arterial pressure was positively associated with blood retinol-binding protein 4, fatty acid-binding protein 4, and leptin concentrations (all P<0.001) and inversely with adiponectin (P=0.002). In fully adjusted models, mean arterial pressure was positively associated with retinol-binding protein 4 and leptin receptor levels (P<0.002 both). In fully adjusted models, aortic stiffness was positively associated with fatty acid-binding protein 4 concentrations (P=0.02), but inversely with leptin and leptin receptor levels (P≤0.03 both). In our large community-based sample, circulating concentrations of select adipokines were associated with vascular stiffness measures, consistent with the hypothesis that adipokines may influence vascular function and may contribute to the relation between obesity and hypertension.
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Affiliation(s)
- Justin P Zachariah
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.).
| | - Susan Hwang
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Naomi M Hamburg
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Emelia J Benjamin
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Martin G Larson
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Daniel Levy
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Joseph A Vita
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Lisa M Sullivan
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Gary F Mitchell
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
| | - Ramachandran S Vasan
- From the Department of Cardiology, Boston Children's Hospital and Department of Pediatrics Harvard Medical School, MA (J.P.Z.); Department of Biostatistics (S.H., L.M.S.) and Department of Epidemiology (E.J.B., R.S.V.), Boston University School of Public Health, MA; Section of Cardiovascular Medicine, Department of Medicine, Boston University School of Medicine, MA (N.M.H., E.J.B., J.A.V., R.S.V.); Boston University's and National Heart, Blood and Lung Institute's Framingham Heart Study, Framingham, MA (E.J.B., M.G.L., D.L., J.A.V., R.S.V.); Department of Mathematics, Boston University, MA (M.G.L.); and Cardiovascular Engineering, Inc, Norwood, MA (G.F.M.)
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16
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Ectopic adiposopathy and association with cardiovascular disease risk factors: The Uberlândia Heart Study. Int J Cardiol 2015; 190:140-2. [DOI: 10.1016/j.ijcard.2015.04.170] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/18/2015] [Accepted: 04/20/2015] [Indexed: 01/24/2023]
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17
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Zafrir B, Khashper A, Gaspar T, Dobrecky-Mery I, Azencot M, Lewis BS, Rubinshtein R, Halon DA. Prognostic impact of abdominal fat distribution and cardiorespiratory fitness in asymptomatic type 2 diabetics. Eur J Prev Cardiol 2014; 22:1146-53. [DOI: 10.1177/2047487314544044] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/19/2014] [Accepted: 06/28/2014] [Indexed: 01/15/2023]
Affiliation(s)
- Barak Zafrir
- Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Alla Khashper
- Department of Diagnostic Radiology, McGill University Health Centre, Montreal, Canada
| | - Tamar Gaspar
- Department of Radiology, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | | | - Mali Azencot
- Department of Radiology, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Basil S Lewis
- Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - Ronen Rubinshtein
- Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
| | - David A Halon
- Department of Cardiovascular Medicine, Lady Davis Carmel Medical Center and The Ruth and Bruce Rappaport School of Medicine, Technion-Israel Institute of Technology, Haifa, Israel
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18
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Jankovic A, Korac A, Srdic-Galic B, Buzadzic B, Otasevic V, Stancic A, Vucetic M, Markelic M, Velickovic K, Golic I, Korac B. Differences in the redox status of human visceral and subcutaneous adipose tissues--relationships to obesity and metabolic risk. Metabolism 2014; 63:661-71. [PMID: 24582138 DOI: 10.1016/j.metabol.2014.01.009] [Citation(s) in RCA: 48] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/08/2013] [Revised: 12/23/2013] [Accepted: 01/14/2014] [Indexed: 12/14/2022]
Abstract
OBJECTIVE Metabolic homeostasis depends on adipocyte metabolic responses/processes, most of which are redox-regulated. Besides, visceral and subcutaneous adipose tissues (VAT and SAT, respectively) differ metabolically and in their contribution to metabolic complications, but their redox characteristics in humans are still unknown. To understand the molecular mechanisms of metabolic syndrome development, we analysed the redox characteristics of VAT and SAT in groups with various body weights and metabolic risks. MATERIAL AND METHODS Fifty premenopausal women were classified according to body mass index into normal-weight and obese groups, and these groups were further sub-classified into metabolically healthy and metabolically obese ("at risk") based on the homeostasis model assessment of insulin resistance (HOMA-IR) index and the triglyceride, total-, LDL- and HDL-cholesterol levels. Antioxidant components, NADPH oxidase protein and 4-hydroxynonenal (4-HNE) levels were analysed in VAT and SAT. RESULTS Compared with the SAT, the VAT showed a higher basal level of glutathione (GSH) and GSH-dependent enzyme activities. Compared with the metabolically healthy normal-weight controls, the obese groups of women showed lower GSH levels in both depots. However, in these groups, additional prooxidative changes (increased NADPH oxidase and 4-HNE and decreased levels of SOD and/or CAT) were observed only in VAT. CONCLUSIONS Because of the critical role of thiol-redox homeostasis in lipogenesis, interdepot-differences in the GSH-dependent antioxidant part may be connected to the higher metabolic activity found in VAT. Analogously, the lower GSH levels that occur during obesity and the corresponding additional redox imbalance may be signs of VAT metabolic dysfunction that underlie the subsequent metabolic impairment.
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Affiliation(s)
- Aleksandra Jankovic
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia
| | - Aleksandra Korac
- Center for Electron Microscopy, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
| | - Biljana Srdic-Galic
- Department of Anatomy, Faculty of Medicine, University of Novi Sad, 21000 Novi Sad, Serbia
| | - Biljana Buzadzic
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia
| | - Vesna Otasevic
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia
| | - Ana Stancic
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia
| | - Milica Vucetic
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia
| | - Milica Markelic
- Center for Electron Microscopy, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
| | - Ksenija Velickovic
- Center for Electron Microscopy, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
| | - Igor Golic
- Center for Electron Microscopy, Faculty of Biology, University of Belgrade, 11000 Belgrade, Serbia
| | - Bato Korac
- Department of Physiology, Institute for Biological Research "Sinisa Stankovic", University of Belgrade, 11060 Belgrade, Serbia.
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Walker UA, Lebrecht D, Reichard W, Kirschner J, Bissé E, Iversen L, Venhoff AC, Venhoff N. Zidovudine induces visceral mitochondrial toxicity and intra-abdominal fat gain in a rodent model of lipodystrophy. Antivir Ther 2014; 19:783-92. [PMID: 24584039 DOI: 10.3851/imp2758] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/14/2014] [Indexed: 10/25/2022]
Abstract
BACKGROUND The use of zidovudine is associated with a loss of subcutaneous adipose tissue (SAT). We assessed if zidovudine treatment also affects visceral adipose tissue (VAT) and if uridine supplementation abrogates the adverse effects of zidovudine on VAT. METHODS Rats were fed zidovudine for 21 weeks with or without simultaneous uridine supplementation. Control animals did not receive zidovudine, or were treated with uridine alone. Changes in SAT and VAT were monitored by magnetic resonance imaging. Adipose tissue was examined for structural and molecular signs of mitochondrial toxicity. RESULTS Zidovudine induced lipoatrophy in SAT and fat hypertrophy in VAT. Compared with controls zidovudine-exposed VAT adipocytes had increased diameters, microvesicular steatosis and enlarged mitochondria with disrupted crystal architecture on electron microscopy. VAT adipocyte mitochondrial DNA (mtDNA) copy numbers were diminished, as were mtDNA-encoded respiratory chain proteins. The 'common' mtDNA deletion was detected in high frequencies in zidovudine treated animals, but not in the controls. Although mtDNA depletion was more profound in SAT compared with VAT, the 'common' deletion tended to be more frequent in the VAT than in the SAT. Uridine coadministration abrogated all effects of zidovudine on VAT and SAT pathology. CONCLUSIONS Zidovudine induces a gain of intra-abdominal fat in association with quantitative and qualitative alterations of the mitochondrial genome and impaired expression of mtDNA-encoded respiratory chain components, indicating that zidovudine may contribute to abdominal fat hypertrophy in HIV-infected patients. In this rodent model, uridine supplementation abrogates both SAT and VAT pathology induced by zidovudine.
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Affiliation(s)
- Ulrich A Walker
- Department of Rheumatology and Clinical Immunology, University Medical Center Freiburg, Freiburg, Germany
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Leyvraz C, Verdumo C, Suter M, Paroz A, Calmes JM, Marques-Vidal PM, Giusti V. Changes in gene expression profile in human subcutaneous adipose tissue during significant weight loss. Obes Facts 2012; 5:440-51. [PMID: 22797372 DOI: 10.1159/000341137] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/08/2011] [Accepted: 11/20/2011] [Indexed: 12/29/2022] Open
Abstract
OBJECTIVE To analyze the expression of peroxisome proliferator-activated receptor-γ1 and 2 (PPARγ1 and 2), 11β-hydroxysteroid dehydrogenase type 1 (11βHSD1), and leptin in adipose tissue (AT) of obese women during weight loss following Roux-en-Y gastric bypass (RYGB) and to compare these levels with those obtained in AT of nonobese subjects. METHODS Gene expression was determined by real-time RT-PCR prior to surgery and at 3, 6, and 12 months after RYGB. RESULTS All obese patients lost weight, reaching a mean BMI of 29.3 ± 1.0 kg/m(2) at 1 year after surgery (-33.9 ± 1.5% of their initial body weight). In obese subjects leptin and 11βHSD1 were over-expressed, whereas PPARγ1 was expressed at lower levels compared to controls. After surgery, leptin and 11βHSD1 gene expression decreased, whereas PPARγ1 expression increased. At 12 months after RYGB, these 3 genes had reached levels similar to the controls. In contrast, PPARγ2 gene expression was not different between groups and types of tissue and remained unchanged during weight loss. We found a positive correlation between BMI and levels of gene expression of leptin and 11βHSD1. CONCLUSION Gene expression of leptin, PPARγ1, and 11βHSD1 in AT is modified in human obesity. This default is completely corrected by RYGB.
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Affiliation(s)
- Céline Leyvraz
- Service of Endocrinology, Diabetes and Metabolism, University Hospital CHUV, Lausanne, Switzerland
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Leyvraz C, Suter M, Verdumo C, Calmes JM, Paroz A, Darimont C, Gaillard RC, Pralong FP, Giusti V. Selective effects of PPARgamma agonists and antagonists on human pre-adipocyte differentiation. Diabetes Obes Metab 2010; 12:195-203. [PMID: 19895635 DOI: 10.1111/j.1463-1326.2009.01149.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM The insulin sensitizer rosiglitazone (RTZ) acts by activating peroxisome proliferator and activated receptor gamma (PPAR gamma), an effect accompanied in vivo in humans by an increase in fat storage. We hypothesized that this effect concerns PPARgamma(1) and PPARgamma(2) differently and is dependant on the origin of the adipose cells (subcutaneous or visceral). To this aim, the effect of RTZ, the PPARgamma antagonist GW9662 and lentiviral vectors expressing interfering RNA were evaluated on human pre-adipocyte models. METHODS Two models were investigated: the human pre-adipose cell line Chub-S7 and primary pre-adipocytes derived from subcutaneous and visceral biopsies of adipose tissue (AT) obtained from obese patients. Cells were used to perform oil-red O staining, gene expression measurements and lentiviral infections. RESULTS In both models, RTZ was found to stimulate the differentiation of pre-adipocytes into mature cells. This was accompanied by significant increases in both the PPARgamma(1) and PPARgamma(2) gene expression, with a relatively stronger stimulation of PPARgamma(2). In contrast, RTZ failed to stimulate differentiation processes when cells were incubated in the presence of GW9662. This effect was similar to the effect observed using interfering RNA against PPARgamma(2). It was accompanied by an abrogation of the RTZ-induced PPARgamma(2) gene expression, whereas the level of PPARgamma(1) was not affected. CONCLUSIONS Both the GW9662 treatment and interfering RNA against PPARgamma(2) are able to abrogate RTZ-induced differentiation without a significant change of PPARgamma(1) gene expression. These results are consistent with previous results obtained in animal models and suggest that in humans PPARgamma(2) may also be the key isoform involved in fat storage.
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Affiliation(s)
- C Leyvraz
- Service of Endocrinology, Diabetology and Metabolism, University Hospital CHUV, Lausanne, Switzerland
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Renin-angiotensin system, natriuretic peptides, obesity, metabolic syndrome, and hypertension: an integrated view in humans. J Hypertens 2008; 26:831-43. [PMID: 18398321 DOI: 10.1097/hjh.0b013e3282f624a0] [Citation(s) in RCA: 188] [Impact Index Per Article: 11.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
The obesity pandemic is closely related to hypertension and metabolic syndrome. Visceral adipose tissue plays a key role in the metabolic and cardiovascular complications of being overweight. The pathophysiological link between visceral adiposity and cardiometabolic complications focuses on insulin sensitivity, sympathetic nervous system, renin-angiotensin-aldosterone system (RAAS) and, only recently, on cardiac natriuretic peptide system (CNPS). RAAS and CNPS are endogenous antagonistic systems on sodium balance, cardiovascular system, and metabolism. The circulating RAAS is dysregulated in obese patients, and adipose tissue has a full local renin-angiotensin system that is active at local and systemic level. Adipocyte biology and metabolism are influenced by local renin-angiotensin system, with angiotensin II acting as a 'growth factor' for adipocytes. CNPS induces natriuresis and diuresis, reduces blood pressure, and, moreover, has powerful lipolytic and lipomobilizing activity in humans but not in rodents. In obesity, lower plasmatic natriuretic peptides levels with increasing BMI, waist circumference, and metabolic syndrome have been documented. Thus, reduced CNPS effects coupled with increased RAAS activity have a central role in obesity and its deadly complications. We propose herein an integrated view of the dysregulation of these two antagonistic systems in human obesity complicated with hypertension, metabolic syndrome, and increased cardiovascular risk.
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Garruti G, Giusti V, Nussberger J, Darimont C, Verdumo C, Amstutz C, Puglisi F, Giorgino F, Giorgino R, Cotecchia S. Expression and secretion of the atrial natriuretic peptide in human adipose tissue and preadipocytes. Obesity (Silver Spring) 2007; 15:2181-9. [PMID: 17890485 DOI: 10.1038/oby.2007.259] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE Atrial natriuretic peptide (ANP) is a secretory hormone displaying diuretic, natriuretic, and vasorelaxant activities. Recently, its lipolytic activity has been reported. Since the expression of ANP in adipose tissue has not been documented, we used real-time reverse transcriptase polymerase chain reaction (RT-PCR) to investigate the expression of ANP in human adipose tissue and preadipocytes. RESEARCH METHODS AND PROCEDURES RNA was extracted from the human adipose tissue of severely obese premenopausal women as well as from human preadipocytes. For human preadipocytes, two cell systems were investigated: the human preadipose immortalized (Chub-S7) cells, a well-characterized human preadipose cell line, and primary preadipocytes derived from the stromal vascular fraction of the human adipose tissue. We measured the mRNA of ANP, of corin (a transmembrane serine protease involved in the conversion of pro-ANP to ANP) and of uncoupling protein 2 (UCP2; a control gene known to be ubiquitously expressed). The expression of ANP was also investigated using immunofluorescence and radioimmunoassay in Chub-S7 cells and human primary preadipocytes in culture. RESULTS Our results indicate that ANP and corin are expressed at the mRNA level in human adipose tissue and preadipocytes. Immunofluorescence experiments demonstrated that pro-ANP was expressed in Chub-S7 cells. In addition, ANP secretion could be measured in Chub-S7 cells and human primary preadipocytes in culture. Rosiglitazone, a selective peroxisome proliferator-activated receptor type gamma (PPAR-gamma) agonist promoting adipocyte differentiation, was found to modulate both ANP expression and secretion in preadipocytes. DISCUSSION Our findings suggest the existence of an autocrine/paracrine system for ANP in the human adipose tissue whose implications in lipolysis and cardiovascular function need to be further explored.
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Affiliation(s)
- Gabriella Garruti
- Department of Pharmacology and Toxicology, Faculty of Biology and Medicine, University of Lausanne, Rue du Bugnon 27, CH-1005 Lausanne, Switzerland
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Drolet R, Richard C, Sniderman AD, Mailloux J, Fortier M, Huot C, Rhéaume C, Tchernof A. Hypertrophy and hyperplasia of abdominal adipose tissues in women. Int J Obes (Lond) 2007; 32:283-91. [PMID: 17726433 DOI: 10.1038/sj.ijo.0803708] [Citation(s) in RCA: 165] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
OBJECTIVE To examine the expression of selected transcription factors involved in adipogenesis and genes related to lipid metabolism in abdominal subcutaneous and omental fat tissue. RESEARCH DESIGN AND METHODS We obtained subcutaneous and omental adipose tissue samples from 40 women undergoing abdominal hysterectomies (age: 47+/-5 years; BMI 27.9+/-5.3 kg/m(2)). We measured isolated adipocyte size and metabolism, and detailed measures of body fat accumulation and body fat distribution were obtained (dual-energy X-ray absorptiometry and computed tomography, respectively). RESULTS Adipocyte size of both subcutaneous and omental fat were increased with higher body fat mass values, with similar regression slopes in each compartment. In contrast, with higher body fat mass values, fat accumulation was progressively higher in the subcutaneous than in the visceral fat compartment, suggesting hyperplasia in the subcutaneous fat compartment. Messenger RNA levels of CEBPalpha, PPARgamma2, SREBP1c and genes related to lipid metabolism (LPL, FABP4, DGAT1, DGAT2, PLIN and HSL) were significantly higher in subcutaneous than in omental fat tissue (P< or =0.001 for all). Only subcutaneous expression of these genes tracked with obesity levels as reflected by significant positive associations between subcutaneous fat CEBPalpha, SREBP1c and DGAT2 expression and total body fat mass (r=0.37, r=0.41, r=0.57, respectively, P< or =0,05), fat percentage (r=0.40, r=0.39, r=058, respectively, P< or =0,05) and subcutaneous adipose tissue area (r=0.36, r=0.38, r=0.58, respectively, P< or =0,05). Omental adipose tissue expression levels of these genes were not significantly related to adiposity measures. CONCLUSIONS These results show that in obese women, hyperplasia is predominant in the subcutaneous fat depot, whereas fat cell hypertrophy is observed both in the omental and subcutaneous compartments.
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Affiliation(s)
- R Drolet
- Molecular Endocrinology and Oncology Research Center, Laval University Medical Research Center and Laval University, Québec, PQ, Canada
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Fox CS, Massaro JM, Hoffmann U, Pou KM, Maurovich-Horvat P, Liu CY, Vasan RS, Murabito JM, Meigs JB, Cupples LA, D'Agostino RB, O'Donnell CJ. Abdominal visceral and subcutaneous adipose tissue compartments: association with metabolic risk factors in the Framingham Heart Study. Circulation 2007; 116:39-48. [PMID: 17576866 DOI: 10.1161/circulationaha.106.675355] [Citation(s) in RCA: 1991] [Impact Index Per Article: 117.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Visceral adipose tissue (VAT) compartments may confer increased metabolic risk. The incremental utility of measuring both visceral and subcutaneous abdominal adipose tissue (SAT) in association with metabolic risk factors and underlying heritability has not been well described in a population-based setting. METHODS AND RESULTS Participants (n=3001) were drawn from the Framingham Heart Study (48% women; mean age, 50 years), were free of clinical cardiovascular disease, and underwent multidetector computed tomography assessment of SAT and VAT volumes between 2002 and 2005. Metabolic risk factors were examined in relation to increments of SAT and VAT after multivariable adjustment. Heritability was calculated using variance-components analysis. Among both women and men, SAT and VAT were significantly associated with blood pressure, fasting plasma glucose, triglycerides, and high-density lipoprotein cholesterol and with increased odds of hypertension, impaired fasting glucose, diabetes mellitus, and metabolic syndrome (P range < 0.01). In women, relations between VAT and risk factors were consistently stronger than in men. However, VAT was more strongly correlated with most metabolic risk factors than was SAT. For example, among women and men, both SAT and VAT were associated with increased odds of metabolic syndrome. In women, the odds ratio (OR) of metabolic syndrome per 1-standard deviation increase in VAT (OR, 4.7) was stronger than that for SAT (OR, 3.0; P for difference between SAT and VAT < 0.0001); similar differences were noted for men (OR for VAT, 4.2; OR for SAT, 2.5). Furthermore, VAT but not SAT contributed significantly to risk factor variation after adjustment for body mass index and waist circumference (P < or = 0.01). Among overweight and obese individuals, the prevalence of hypertension, impaired fasting glucose, and metabolic syndrome increased linearly and significantly across increasing VAT quartiles. Heritability values for SAT and VAT were 57% and 36%, respectively. CONCLUSIONS Although both SAT and VAT are correlated with metabolic risk factors, VAT remains more strongly associated with an adverse metabolic risk profile even after accounting for standard anthropometric indexes. Our findings are consistent with the hypothesized role of visceral fat as a unique, pathogenic fat depot. Measurement of VAT may provide a more complete understanding of metabolic risk associated with variation in fat distribution.
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Affiliation(s)
- Caroline S Fox
- National Heart, Lung and Blood Institute's Framingham Heart Study, Framingham, Mass, USA.
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Okamoto Y, Higashiyama H, Rong JX, McVey MJ, Kinoshita M, Asano S, Hansen MK. Comparison of mitochondrial and macrophage content between subcutaneous and visceral fat in db/db mice. Exp Mol Pathol 2007; 83:73-83. [PMID: 17434481 DOI: 10.1016/j.yexmp.2007.02.007] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2006] [Revised: 02/20/2007] [Accepted: 02/20/2007] [Indexed: 10/23/2022]
Abstract
Central (visceral) obesity is more closely associated with insulin resistance, type 2 diabetes, and cardiovascular disease than peripheral (subcutaneous) obesity, however the underlying differences in morphology and pathophysiology between subcutaneous and visceral adipose are largely unknown. To evaluate the effects of diabetes and rosiglitazone (RSG) treatment, the expression of mitochondrial Hsp60, UCP-1 and F4/80 in inguinal subcutaneous (SC) fat, composed of white and brown adipose tissues, and epididymal (EP) fat, mainly white adipose tissue, were evaluated. In diabetic db/db mice, there was significant increased number of aggregated macrophage foci compared to db/+ mice, especially in EP fat. On the other hand, the expression of mitochondrial Hsp60 protein was suppressed in both SC and EP fat of db/db mice compared to db/+ mice, and the expression level of mitochondrial Hsp60 in db/+ mice was lower in EP fat compared with SC. In db/db mice, RSG suppressed the number of aggregated macrophage foci in EP fat, but not in SC fat. RSG ameliorated the mitochondrial Hsp60 expression and induced the expression of UCP-1 in both SC and EP fat. Taken together, these data suggest that differences exist in mitochondrial and macrophage content, and in the response to RSG between visceral and subcutaneous adipose tissue, and adipose type and distribution may be important for obesity-linked insulin resistance.
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Affiliation(s)
- Yuji Okamoto
- Development and Medical Affairs Division, GlaxoSmithKline, 4-6-15 Sendagaya, Shibuya-ku, Tokyo 151-8566, Japan
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Galinier A, Carriere A, Fernandez Y, Caspar-Bauguil S, Periquet B, Periquet A, Penicaud L, Casteilla L. Site specific changes of redox metabolism in adipose tissue of obese Zucker rats. FEBS Lett 2006; 580:6391-8. [PMID: 17098232 DOI: 10.1016/j.febslet.2006.10.052] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/17/2006] [Revised: 10/11/2006] [Accepted: 10/24/2006] [Indexed: 02/07/2023]
Abstract
Adipose tissues are differently involved in lipid metabolism and obesity according to their type and location. Increasing reports stress on the impact of redox metabolism on obesity and metabolic syndrome. The aim of this work is to investigate the site-specific redox metabolism in three different adipose tissues and its changes occurring in obesity. We analysed enzymatic and non-enzymatic parameters, and focused on the reduced/oxidized glutathione and coenzyme Q couples. In lean compared with obese non-diabetic Zucker rats, interscapular brown fat seems well protected against oxidative stress and epididymal adipose tissue shows a more reduced glutathione redox state, associated with a higher susceptibility to lipophilic oxidative stress than inguinal adipose tissue. Epididymal adipose tissue redox metabolism significantly differs from inguinal one by its limited redox metabolism adaptation. Our results demonstrate site-specific managements of reactive oxygen species metabolism in obese Zucker rats. These results are not consistent with the classic deciphering of inflammatory situation and produce a new conception of the redox parameters implication in the development of the metabolic syndrome.
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Affiliation(s)
- Anne Galinier
- IFR 31, UMR 5018 CNRS-UPS, Bât L1, CHU Rangueil, TSA 50032, 31059 Toulouse Cedex 9, France.
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Fredriksson J, Carlsson E, Orho-Melander M, Groop L, Ridderstråle M. A polymorphism in the adiponectin gene influences adiponectin expression levels in visceral fat in obese subjects. Int J Obes (Lond) 2006; 30:226-32. [PMID: 16231017 DOI: 10.1038/sj.ijo.0803138] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/19/2023]
Abstract
OBJECTIVE Reduced serum adiponectin levels have been found in obesity and type 2 diabetes and variations in the adiponectin gene (APM1) have been associated with type 2 diabetes and features of the metabolic syndrome in different populations. STUDY DESIGN Here, we investigated the expression of APM1 in adipose tissue and studied the relationship between variation in APM1 expression, the APM1 G276T polymorphism, the common PPARG Pro12Ala polymorphism and clinical features of 36 morbidly obese (body mass index (BMI) 41.5 +/- 4.9 kg/m2) nondiabetic subjects. RESULTS APM1 mRNA expression in visceral fat was correlated with serum adiponectin levels (r = 0.54, P = 0.012). In visceral, but not in subcutaneous, adipose tissue APM1 mRNA level was 38% higher among carriers of the APM1 G276T T allele (G/T and T/T) than among carriers of the G/G genotype (0.91 +/- 0.06 for G/T and T/T carriers vs 0.66 +/- 0.09 for G/G carriers, P = 0.013). Carriers of the T allele also had significantly higher body fat percent compared to G/G carriers (65 +/- 6 vs 56 +/- 10%, P = 0.011). CONCLUSION Our results indicate that genetic variation in APM1 influences the expression of the gene in visceral adipose tissue and suggest a potential role for such variation in regulation of body fat accumulation in obese subjects.
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Affiliation(s)
- J Fredriksson
- Department of Clinical Sciences/Diabetes and Endocrinology, Malmö University Hospital, Lund University, Wallenberg Laboratory, Malmö, Sweden.
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Abstract
The etiology of obesity is multifactorial and still unclear. Genetic factors play a significant role and include several gene candidates: polymorphisms of genes for ss(2)-adrenoreceptor, resistin, estrogen receptor-a and peroxisome proliferator-activated receptor-gamma. Moreover, peptides regulating hunger and satiety, e.g. leptin, galanin, cholecystokinin and neuropeptide Y, and altered nutritional patterns have been implicated. Also, factors associated with aging, e.g. decreased levels of growth hormone and dehydroepiandrosterone, and the activity of the sympathetic nervous system (resting metabolism and thermogenesis) cannot be disregarded. Participation of the sex steroids and inflammatory factors has also been postulated in the etiology of obesity. Three phenotypes of obesity are postulated; however, the visceral (abdominal) phenotype is typical of postmenopausal women and is characterized by several metabolic disorders with high risks of diabetes mellitus type 2 and cardiovascular disease. On the basis of personal experience and data from evidence-based medicine, diagnostic-therapeutic algorithms of climacteric obesity are presented.
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Affiliation(s)
- Andrzej Milewicz
- Department of Endocrinology, Diabetology, and Isotope Treatment, University of Medicine, Wroclaw, Poland.
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Site specific alterations of adipose tissue mitochondria in 3′-azido-3′-deoxythymidine (AZT)-treated rats: An early stage in lipodystrophy? Biochem Pharmacol 2005; 70:90-101. [DOI: 10.1016/j.bcp.2005.04.015] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2004] [Accepted: 04/11/2005] [Indexed: 12/13/2022]
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Abstract
Insulin resistance is a common phenomenon of the metabolic syndrome, which is clinically characterized by a clustering of various cardiovascular risk factors in a single individual and a higher prevalence of respective complications, such as coronary heart disease and stroke. At the cellular level, insulin resistance is defined as a reduced insulin action, which can affect not only glucose uptake, but also gene regulation. Elucidation of novel signaling networks within the cell which are mediating and affecting insulin action will reveal many new genes and drug targets that are potentially of clinical relevance in the future. In this chapter, we propose that the metabolic syndrome might be a clinical consequence of altered gene regulation. This is illuminated in the context of transcription factors, e.g., sterol regulatory element binding proteins (SREBPs), coupling signals from nutrients, metabolites, and hormones at the gene regulatory level with pathobiochemical features of increased lipid accumulation in lean nonadipose tissues. The phenomenon of ectopic lipid accumulation (lipotoxicity) appears to be a novel link between insulin resistance, obesity, and possibly other features of the metabolic syndrome. Therefore, the investigation of specific gene regulatory networks and their alterations might be a clue to understanding the development and clustering of different cardiovascular risk factors in different individuals. As cellular sensors transcription factors--as common denominators of gene regulatory networks--might thereby also determine the susceptibility of individuals to cardiovascular risk factors and their complications.
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Affiliation(s)
- D Müller-Wieland
- Deutsches Diabetes-Zentrum, Institut für Klinische Biochemie und Pathobiochemie, Düsseldorf, Germany.
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Stelmanska E, Sucajtys-Szulc E, Korczynska J, Adrych K, Swierczynski J. Diversity of SREBP-1 gene expression in rat adipose tissue depots in response to refeeding after food restriction. Biochim Biophys Acta Mol Cell Biol Lipids 2004; 1733:130-6. [PMID: 15863360 DOI: 10.1016/j.bbalip.2004.12.004] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2004] [Revised: 10/19/2004] [Accepted: 12/02/2004] [Indexed: 12/28/2022]
Abstract
The SREBP-1c mRNA level and precursor (microsomal) form of SREBP-1 abundance were significantly higher in epididymal and perirenal than in subcutaneous white adipose tissue of control rats. Moreover, the SREBP-1c mRNA level and an amount of precursor form of SREBP-1 were significantly higher in the epididymal and perirenal white adipose tissue of rats maintained on restricted diet and refed ad libitum for 48 h as compared to the control animals. No significant effects of food restriction/refeeding on SREBP-1c mRNA level and an amount of precursor form of SREBP-1 were found in subcutaneous white adipose tissue. The mature (nuclear) form of SREBP-1 was significantly increased in the epididymal, perirenal and subcutaneous white adipose tissue of the food restricted/refed animals. The activity, protein level and the mRNA abundance of malic enzyme (one of the target genes for SREBP-1) increased significantly in the epididymal, perirenal and subcutaneous white adipose tissue of the food restricted/refed rats as compared to the control animals, however the increase in perirenal and epididymal was higher than in the subcutaneous white adipose tissue. The results presented suggest that SREBP-1c is differently expressed in various rat white adipose tissue depots both under basal (control) and dieting conditions.
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Affiliation(s)
- Ewa Stelmanska
- Department of Biochemistry Medical University of Gdansk ul. Debinki 1, Poland
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Freedland ES. Role of a critical visceral adipose tissue threshold (CVATT) in metabolic syndrome: implications for controlling dietary carbohydrates: a review. Nutr Metab (Lond) 2004; 1:12. [PMID: 15530168 PMCID: PMC535537 DOI: 10.1186/1743-7075-1-12] [Citation(s) in RCA: 175] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2004] [Accepted: 11/05/2004] [Indexed: 12/25/2022] Open
Abstract
There are likely many scenarios and pathways that can lead to metabolic syndrome. This paper reviews mechanisms by which the accumulation of visceral adipose tissue (VAT) may contribute to the metabolic syndrome, and explores the paradigm of a critical VAT threshold (CVATT). Exceeding the CVATT may result in a number of metabolic disturbances such as insulin resistance to glucose uptake by cells. Metabolic profiles of patients with visceral obesity may substantially improve after only modest weight loss. This could reflect a significant reduction in the amount of VAT relative to peripheral or subcutaneous fat depots, thereby maintaining VAT below the CVATT. The CVATT may be unique for each individual. This may help explain the phenomena of apparently lean individuals with metabolic syndrome, the so-called metabolically normal weight (MONW), as well as the obese with normal metabolic profiles, i.e., metabolically normal obese (MNO), and those who are "fit and fat." The concept of CVATT may have implications for prevention and treatment of metabolic syndrome, which may include controlling dietary carbohydrates. The identification of the CVATT is admittedly difficult and its anatomical boundaries are not well-defined. Thus, the CVATT will continue to be a work in progress.
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Affiliation(s)
- Eric S Freedland
- Boston University School of Medicine, 5 Bessom Street, No, 318, Marblehead, MA 01945, USA.
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