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Ji J, Fotros D, Sohouli MH, Velu P, Fatahi S, Liu Y. The effect of a ketogenic diet on inflammation-related markers: a systematic review and meta-analysis of randomized controlled trials. Nutr Rev 2024:nuad175. [PMID: 38219223 DOI: 10.1093/nutrit/nuad175] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/16/2024] Open
Abstract
CONTEXT Despite the important role of inflammation-related factors on the occurrence of chronic diseases, there is still conflicting evidence about the effects of the ketogenic diet (KD) on these factors. OBJECTIVE In order to obtain a better viewpoint, this study aimed to comprehensively investigate the effects of a KD on inflammation-related markers. DATA SOURCES To find pertinent randomized controlled trials up to August 2023, databases including PubMed/Medline, Web of Science, Scopus, Cochrane Library, and Embase were searched. DATA EXTRACTION This study included all randomized controlled trials investigating the effects of a KD on C-reactive protein (CRP), tumor necrosis factor-alpha (TNF-α), interleukin (IL)-6, IL-8, and IL-10 levels. Pooled weighted mean difference (WMD) and 95% confidence intervals (CIs) were achieved by random-effects model analysis for the best estimation of outcomes. DATA ANALYSIS Forty-four studies were included in this article. The pooled findings showed that a KD has an effect on lowering TNF-α (WMD: -0.32 pg/mL; 95% CI: -0.55, -0.09; P = 0.007) and IL-6 (WMD: -0.27 pg/mL; 95% CI: -0.52, -0.02; P = 0.036) compared with control groups. However, no significant effect was reported for others inflammation marker-related levels. The results of the subgroup analysis showed that, in trials following the KD for ≤8 weeks and in people aged ≤50 years, the reduction in TNF-α levels was significantly higher than in other groups. In addition, in people with a body mass index greater than 30 kg/m2 compared to a body mass index ≤30 kg/m2, IL-6 levels decreased to a greater extent after receiving the KD. CONCLUSIONS Consequently, adherence to a KD appears to improve some markers associated with inflammation, including TNF-α and IL-6.
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Affiliation(s)
- Jiawei Ji
- Department of General Surgery, Xinhua Hospital Affiliated to Shanghai Jiao Tong University School of Medicine, Shanghai, China
| | - Danial Fotros
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mohammad Hassan Sohouli
- Student Research Committee, Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Periyannan Velu
- Galileovasan Offshore and Research and Development Pvt Ltd, Nagapattinam, Tamil Nadu, India
| | - Somaye Fatahi
- Department of Clinical Nutrition and Dietetics, Faculty of Nutrition and Food Technology, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Yinghao Liu
- Institute of Grassland Research, Chinese Academy of Agricultural Sciences, Hohhot, China
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2
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Glassman I, Le N, Asif A, Goulding A, Alcantara CA, Vu A, Chorbajian A, Mirhosseini M, Singh M, Venketaraman V. The Role of Obesity in Breast Cancer Pathogenesis. Cells 2023; 12:2061. [PMID: 37626871 PMCID: PMC10453206 DOI: 10.3390/cells12162061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/22/2023] [Revised: 08/03/2023] [Accepted: 08/11/2023] [Indexed: 08/27/2023] Open
Abstract
Research has shown that obesity increases the risk for type 2 diabetes mellitus (Type 2 DM) by promoting insulin resistance, increases serum estrogen levels by the upregulation of aromatase, and promotes the release of reactive oxygen species (ROS) by macrophages. Increased circulating glucose has been shown to activate mammalian target of rapamycin (mTOR), a significant signaling pathway in breast cancer pathogenesis. Estrogen plays an instrumental role in estrogen-receptor-positive breast cancers. The role of ROS in breast cancer warrants continued investigation, in relation to both pathogenesis and treatment of breast cancer. We aim to review the role of obesity in breast cancer pathogenesis and novel therapies mediating obesity-associated breast cancer development. We explore the association between body mass index (BMI) and breast cancer incidence and the mechanisms by which oxidative stress modulates breast cancer pathogenesis. We discuss the role of glutathione, a ubiquitous antioxidant, in breast cancer therapy. Lastly, we review breast cancer therapies targeting mTOR signaling, leptin signaling, blood sugar reduction, and novel immunotherapy targets.
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Affiliation(s)
- Ira Glassman
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Nghia Le
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Aamna Asif
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Anabel Goulding
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Cheldon Ann Alcantara
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Annie Vu
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Abraham Chorbajian
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Mercedeh Mirhosseini
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
| | - Manpreet Singh
- Corona Regional Medical Center, Department of Emergency Medicine, Corona, CA 92882, USA
| | - Vishwanath Venketaraman
- College of Osteopathic Medicine of the Pacific, Western University of Health Sciences, Pomona, CA 91766, USA (N.L.); (A.A.); (C.A.A.); (M.M.)
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3
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Arent CO, Padilha APZ, Borba LA, de Azevedo Cardoso T, André MC, Martinello NS, Rosa T, Abelaira HM, de Moura AB, Andrade NM, Bertollo AG, de Oliveira GG, Bagatini MD, Ignácio ZM, Quevedo J, Ceretta LB, Réus GZ. ABO Blood Type and Metabolic Markers in COVID-19 Susceptibility and Severity: A Cross-Sectional Study. Metab Syndr Relat Disord 2023; 21:335-344. [PMID: 37352417 DOI: 10.1089/met.2023.0022] [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] [Indexed: 06/25/2023] Open
Abstract
Background and Aims: To evaluate the effect of the severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) virus on the function and metabolic changes, as well as the relationship of the virus with blood groups. Methods and Results: This cross-sectional study included a matched sample of adult individuals with coronavirus disease 2019 (COVID-19) (n = 114) or without (controls; n = 236). Blood samples were collected and processed for triglycerides (TGs), total cholesterol, high-density lipoprotein cholesterol (HDL-C), low-density lipoprotein cholesterol, and blood typing analysis. The results showed that subjects with COVID-19 had higher TG and lower HDL-C levels compared with the control group. As for blood typing, the risk of COVID-19 was higher in subjects with blood group A than in those with blood group B and in those with other blood groups. In addition, an association of COVID-19 with blood type and Rh A- was observed. When related to the severity of COVID-19 symptoms, blood type A was more protective against moderate/severe symptoms compared with blood type O. In addition, individuals with blood type O were 2.90 times more likely to have symptoms moderate/severe symptoms of COVID-19 than those with other blood groups and individuals with type A blood were less likely to have severe/moderate symptoms of COVID-19 compared with individuals without type A blood. Conclusion: The results suggest that blood type may play a role in susceptibility to SARS-CoV-2 infection and add evidence that infection with the novel coronavirus may be associated with changes in lipid metabolism.
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Affiliation(s)
- Camila O Arent
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Alex Paulo Z Padilha
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Laura A Borba
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | | | - Monique C André
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Nicoly S Martinello
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Thayse Rosa
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Helena M Abelaira
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Airam B de Moura
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Natalia M Andrade
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Amanda G Bertollo
- Graduate Program in Biomedical Sciences, Laboratory of Physiology Pharmacology and Psychopathology, Federal University of the Southern Frontier, Chapecó, Brazil
| | - Gabriela G de Oliveira
- Graduate Program in Biomedical Sciences, Laboratory of Physiology Pharmacology and Psychopathology, Federal University of the Southern Frontier, Chapecó, Brazil
| | - Margarete D Bagatini
- Graduate Program in Biomedical Sciences, Laboratory of Physiology Pharmacology and Psychopathology, Federal University of the Southern Frontier, Chapecó, Brazil
| | - Zuleide Maria Ignácio
- Graduate Program in Biomedical Sciences, Laboratory of Physiology Pharmacology and Psychopathology, Federal University of the Southern Frontier, Chapecó, Brazil
| | - João Quevedo
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
- Faillace Department of Psychiatry and Behavioral Sciences, Center of Excellence on Mood Disorders, McGovern Medical School, The University of Texas Health Science Center at Houston (UTHealth), Houston, Texas, USA
| | - Luciane B Ceretta
- Graduate Program in Public Health, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
| | - Gislaine Z Réus
- Graduate Program in Health Sciences, Translational Psychiatry Laboratory, University of Southern Santa Catarina (UNESC), Criciúma, Brazil
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Würfel M, Blüher M, Stumvoll M, Ebert T, Kovacs P, Tönjes A, Breitfeld J. Adipokines as Clinically Relevant Therapeutic Targets in Obesity. Biomedicines 2023; 11:biomedicines11051427. [PMID: 37239098 DOI: 10.3390/biomedicines11051427] [Citation(s) in RCA: 11] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 05/04/2023] [Accepted: 05/08/2023] [Indexed: 05/28/2023] Open
Abstract
Adipokines provide an outstanding role in the comprehensive etiology of obesity and may link adipose tissue dysfunction to further metabolic and cardiovascular complications. Although several adipokines have been identified in terms of their physiological roles, many regulatory circuits remain unclear and translation from experimental studies to clinical applications has yet to occur. Nevertheless, due to their complex metabolic properties, adipokines offer immense potential for their use both as obesity-associated biomarkers and as relevant treatment strategies for overweight, obesity and metabolic comorbidities. To provide an overview of the current clinical use of adipokines, this review summarizes clinical studies investigating the potential of various adipokines with respect to diagnostic and therapeutic treatment strategies for obesity and linked metabolic disorders. Furthermore, an overview of adipokines, for which a potential for clinical use has been demonstrated in experimental studies to date, will be presented. In particular, promising data revealed that fibroblast growth factor (FGF)-19, FGF-21 and leptin offer great potential for future clinical application in the treatment of obesity and related comorbidities. Based on data from animal studies or other clinical applications in addition to obesity, adipokines including adiponectin, vaspin, resistin, chemerin, visfatin, bone morphogenetic protein 7 (BMP-7) and tumor necrosis factor alpha (TNF-α) provide potential for human clinical application.
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Affiliation(s)
- Marleen Würfel
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
| | - Matthias Blüher
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
- Helmholtz Institute for Metabolic, Obesity and Vascular Research (HI-MAG), Helmholtz Center Munich at the University of Leipzig and the University of Leipzig Medical Center, 04103 Leipzig, Germany
| | - Michael Stumvoll
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
| | - Thomas Ebert
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
| | - Peter Kovacs
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
- German Center for Diabetes Research (DZD), 85764 Neuherberg, Germany
| | - Anke Tönjes
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
| | - Jana Breitfeld
- Department of Medicine III, Division of Endocrinology, Nephrology and Rheumatology, University of Leipzig, Liebigstr. 18, 04103 Leipzig, Germany
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5
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Jao J, Balmert LC, Sun S, McComsey GA, Brown TT, Tien PC, Currier JS, Stein JH, Qiu Y, LeRoith D, Kurland IJ. Distinct Lipidomic Signatures in People Living With HIV: Combined Analysis of ACTG 5260s and MACS/WIHS. J Clin Endocrinol Metab 2022; 107:119-135. [PMID: 34498048 PMCID: PMC8684537 DOI: 10.1210/clinem/dgab663] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Indexed: 11/19/2022]
Abstract
CONTEXT Disentangling contributions of HIV from antiretroviral therapy (ART) and understanding the effects of different ART on metabolic complications in persons living with HIV (PLHIV) has been challenging. OBJECTIVE We assessed the effect of untreated HIV infection as well as different antiretroviral therapy (ART) on the metabolome/lipidome. METHODS Widely targeted plasma metabolomic and lipidomic profiling was performed on HIV-seronegative individuals and people living with HIV (PLHIV) before and after initiating ART (tenofovir/emtricitabine plus atazanavir/ritonavir [ATV/r] or darunavir/ritonavir [DRV/r] or raltegravir [RAL]). Orthogonal partial least squares discriminant analysis was used to assess metabolites/lipid subspecies that discriminated between groups. Graphical lasso estimated group-specific metabolite/lipid subspecies networks associated with the Homeostatic Model Assessment of Insulin Resistance (HOMA-IR). Correlations between inflammatory markers and metabolites/lipid subspecies were visualized using heat maps. RESULTS Of 435 participants, 218 were PLHIV. Compared to HIV-seronegative individuals, ART-naive PLHIV exhibited higher levels of saturated triacylglycerols/triglycerides (TAGs) and 3-hydroxy-kynurenine, lower levels of unsaturated TAGs and N-acetyl-tryptophan, and a sparser and less heterogeneous network of metabolites/lipid subspecies associated with HOMA-IR. PLHIV on RAL vs ATV/r or DRV/r had lower saturated and unsaturated TAGs. Positive correlations were found between medium-long chain acylcarnitines (C14-C6 ACs), palmitate, and HOMA-IR for RAL but not ATV/r or DRV/r. Stronger correlations were seen for TAGs with interleukin 6 and high-sensitivity C-reactive protein after RAL vs ATV/r or DRV/r initiation; these correlations were absent in ART-naive PLHIV. CONCLUSION Alterations in the metabolome/lipidome suggest increased lipogenesis for ART-naive PLHIV vs HIV-seronegative individuals, increased TAG turnover for RAL vs ATV/r or DRV/r, and increased inflammation associated with this altered metabolome/lipidome after initiating ART. Future studies are needed to understand cardiometabolic consequences of lipogenesis and inflammation in PLHIV.
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Affiliation(s)
- Jennifer Jao
- Northwestern University Feinberg School of Medicine, Department of Pediatrics, Division of Pediatric Infectious Diseases, Department of Medicine, Division of Adult Infectious Diseases, Chicago, Illinois 60611, USA
| | - Lauren C Balmert
- Northwestern University Feinberg School of Medicine, Department of Preventive Medicine, Division of Biostatistics, Chicago, Illinois 60611, USA
| | - Shan Sun
- Ann and Robert H. Lurie Children’s Hospital of Chicago, Department of Pediatrics, Division of Pediatric Infectious Diseases, Chicago, Illinois 60611, USA
| | - Grace A McComsey
- University Hospitals Cleveland Medical Center and Case Western Reserve University, Department of Pediatrics, Department of Medicine, Cleveland, Ohio 44106, USA
| | - Todd T Brown
- Department of Medicine, Division of Endocrinology, Diabetes, and Metabolism, Johns Hopkins University, Baltimore, Maryland 21218, USA
| | - Phyllis C Tien
- University of California, San Francisco, Department of Medicine and Department of Veterans Affairs Medical Center, Division of Infectious Diseases, San Francisco, California 94121, USA
| | - Judith S Currier
- Department of Medicine, Division of Infectious Diseases, University of California Los Angeles, Los Angeles, California 90095, USA
| | - James H Stein
- University of Wisconsin School of Medicine and Public Health, Department of Medicine, Cardiovascular Medicine Division, Madison, Wisconsin 53726, USA
| | - Yunping Qiu
- Stable Isotope and Metabolomics Core Facility, Department of Medicine, Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, New York 10461, USA
| | - Derek LeRoith
- Icahn School of Medicine at Mount Sinai, Department of Medicine, Division of Endocrinology, New York, New York 10029, USA
| | - Irwin J Kurland
- Stable Isotope and Metabolomics Core Facility, Department of Medicine, Fleischer Institute for Diabetes and Metabolism, Albert Einstein College of Medicine, Bronx, New York 10461, USA
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6
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Cybulska AM, Rachubińska K, Szkup M, Schneider-Matyka D, Baranowska-Bosiacka I, Chlubek D, Lubkowska A, Panczyk M, Sołek-Pastuszka J, Grochans E. Serum levels of proinflammatory cytokines and selected bioelements in perimenopausal women with regard to body mass index. Aging (Albany NY) 2021; 13:25025-25037. [PMID: 34890370 PMCID: PMC8714146 DOI: 10.18632/aging.203754] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2021] [Accepted: 11/24/2021] [Indexed: 01/18/2023]
Abstract
During the menopause, decreased estrogen levels may be accompanied by increased levels of inflammatory mediators. Many studies also show significant relationships between the levels of bioelements and proinflammatory cytokines. The aim of this study was to assess the levels of proinflammatory cytokines, C-reactive protein (CRP), and selected bioelements in perimenopausal women with regard to BMI. METHODS The study of 217 perimenopausal women involved the completion of questionnaires concerning sociodemographic and medical data, anthropometric measurements, and blood collection. RESULTS In all studied women, the levels of IL-1β significantly positively correlated with Ca, Mg, and Sr; IFNγ significantly negatively correlated with Sr, and IL-6 with Mg. In women with a normal BMI, the levels of IL-1β significantly positively correlated with Ca and Sr, and CRP positively correlated with Zn. In overweight women, the levels of IL-1β positively correlated with Ca, IL-6 with Na, and IFNγ negatively correlated with Sr. In obese women, the levels of CRP positively correlated with Zn, TNFα with Mg, IFNγ with Cu and P. The levels of IL-6 negatively correlated with Ca and Mg. CONCLUSIONS BMI may be one of the factors that affect the relationship between serum bioelement levels and the levels of proinflammatory cytokines and CRP in women, especially during the menopausal period.
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Affiliation(s)
| | | | - Małgorzata Szkup
- Department of Nursing, Pomeranian Medical University, Szczecin, Poland
| | | | | | - Dariusz Chlubek
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
| | - Anna Lubkowska
- Department of Functional Diagnostics and Physical Medicine, Pomeranian Medical University, Szczecin, Poland
| | - Mariusz Panczyk
- Division of Teaching and Outcomes of Education, Faculty of Health Science, Medical University of Warsaw, Warsaw, Poland
| | - Joanna Sołek-Pastuszka
- Department of Anaesthesiology and Intensive Therapy, Pomeranian Medical University, Szczecin, Poland
| | - Elżbieta Grochans
- Department of Nursing, Pomeranian Medical University, Szczecin, Poland
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Padda J, Khalid K, Almanie AH, Al Hennawi H, Mehta KA, Wijeratne Fernando R, Padda S, Cooper AC, Jean-Charles G. Hyperuricemia in Patients With Coronary Artery Disease and Its Association With Disease Severity. Cureus 2021; 13:e17161. [PMID: 34532188 PMCID: PMC8435271 DOI: 10.7759/cureus.17161] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 08/13/2021] [Indexed: 12/02/2022] Open
Abstract
The biochemical background of coronary artery disease (CAD) has been intensively explored in the past several decades. Previous clinical investigations have demonstrated the association of non-traditional risk factors, such as hyperuricemia, with CAD. Studies have shown that increased serum uric acid (SUA) was associated with an increased risk of adverse cardiovascular (CV) outcomes in patients with CAD. While the exact pathophysiological mechanisms leading to increased risk are still unknown, it has been postulated that hyperuricemia leads to endothelial dysfunction, oxidative metabolism, and platelet adhesiveness and aggregation, leading to CAD. Moreover, previous studies have shown that hyperuricemia is an independent risk factor for CAD. However, the correlation between high SUA levels and the severity of CAD remains unclear. The purpose of this review was to elucidate the association of hyperuricemia to CAD severity and to determine the effect of urate-lowering therapy (ULT) on CAD. A search of PubMed up to June 24, 2021, was carried out by the reviewers. From the findings, hyperuricemia stands as an independent risk factor for CAD, and CAD patients treated with ULT had improved CV outcomes and reduced mortality. Therefore, while SUA level is valuable in predicting an augmented risk of CAD and anticipating worse outcomes, ULT has promising cardioprotective effects.
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Affiliation(s)
| | | | | | | | | | | | | | | | - Gutteridge Jean-Charles
- Internal Medicine, JC Medical Center, Orlando, USA.,Internal Medicine, AdventHealth & Orlando Health Hospital, Orlando, USA
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8
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Abstract
Hyperuricemia and gout have been linked to an increased risk for cardiovascular (CV) disease, stroke, hypertension, heart failure, and chronic kidney disease, possibly through a proinflammatory milieu. However, not all the drugs used in gout treatment improve CV outcomes; colchicine has shown improved CV outcomes in patients with recent myocardial infarction and stable coronary artery disease independent of lipid-lowering effects. There is resurging interest in colchicine following publication of the COLCOT, LoDoCo, LoDoCo2, LoDoCo-MI trials, and COLCORONA trial which will shed light on its utility in COVID-19. Our aim is to review the CV use of colchicine beyond pericardial diseases, as well as CV outcomes of the available gout therapies, including allopurinol and febuxostat. The CARES trial and its surrounding controversies, which lead to the US FDA ‘black box’ warning on febuxostat, in addition to the recent FAST trial which contradicts this and finds febuxostat to be non-inferior, are discussed in this paper.
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9
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Elalouf O, Lidar M, Reitblat T, Zisman D, Balbir-Gurman A, Hakakian O, Mashiach T, Almog R, Elkayam O. High Body Mass Index is Associated with Shorter Retention of Tumor Necrosis Factor-Alpha Blocker Treatment in Rheumatoid Arthritis. Biologics 2021; 15:279-287. [PMID: 34321864 PMCID: PMC8312506 DOI: 10.2147/btt.s290169] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Accepted: 05/10/2021] [Indexed: 11/23/2022]
Abstract
Purpose To evaluate the association between body mass index (BMI) and tumor necrosis factor α (TNF-α) blockers retention in patients with rheumatoid arthritis (RA). Patients and Methods This prospective cohort study analyzed data about patients with RA who initiated TNF blockers from the Israeli registry of inflammatory diseases from 2011 to 2019. Patients were grouped by BMI: normal (BMI <24.9 kg/m2), overweight (BMI 25–29.9 kg/m2), obese (BMI 30–34.9 kg/m2) and morbid obese (BMI ≥35 kg/m2). Treatment cessation due to inefficacy was defined as an “event” and therapy with a drug above 3 months was defined as a “course.” Kaplan–Meier survival curve was used to describe drug survival. Event-free survival was calculated using Cox regression with a hazard ratio and confidence interval of 95%. Results The final analysis included 521 RA patients (80% females) treated with etanercept, infliximab, adalimumab or golimumab. Eight hundred and eighteen treatment initiations were included in the final analysis, 334 (41%) in the normal weight group, 261 (32%) in the overweight, 144 (17%) in the obese and 79 (10%) in the morbid obesity group. Three hundred and twenty-six (40%) treatment initiations were with etanercept, 215 (26%) with adalimumab 197 (24%) with infliximab, and 80 (10%) with golimumab. BMI was inversely associated with drug survival. Morbid obese patients were more likely to discontinue treatment compared with normal weight patients HR 2.28 (95% CI 1.67–3.10, p<0.01). This association remained significant for each drug type (except for golimumab) in a subgroup analysis. Adalimumab switch rate was higher compared to etanercept with HR =1.51 (95% CI 1.20–1.91, p<0.01), no other significant differences were noted between the other drugs. Conclusion Morbid obese RA patients have lower TNF-α blocker retention compared to normal weight patients.
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Affiliation(s)
- Ofir Elalouf
- Department of Rheumatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
| | - Merav Lidar
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel.,Rheumatology Unit, The Zabludowicz Center for Autoimmune Diseases, Sheba Medical Center, Ramat Gan, Israel
| | | | - Devy Zisman
- Department of Rheumatology, Carmel Medical Center, Haifa, Israel
| | | | - Odelia Hakakian
- Department of Rheumatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel
| | - Tanya Mashiach
- Epidemiology and Biostatistics Unit, Rambam Health Care Campus, Haifa, Israel
| | - Ronit Almog
- Epidemiology and Biostatistics Unit, Rambam Health Care Campus, Haifa, Israel
| | - Ori Elkayam
- Department of Rheumatology, Tel Aviv Sourasky Medical Center, Tel Aviv, Israel.,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv, Israel
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10
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Mazhar F, Battini V, Gringeri M, Pozzi M, Mosini G, Marran AMN, Akram S, van Manen RP, Radice S, Clementi E, Carnovale C. The impact of anti-TNFα agents on weight-related changes: new insights from a real-world pharmacovigilance study using the FDA adverse event reporting system (FAERS) database. Expert Opin Biol Ther 2021; 21:1281-1290. [PMID: 34191656 DOI: 10.1080/14712598.2021.1948529] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
INTRODUCTION Studies in patients with immune-mediated inflammatory diseases (IMIDs) have inconsistently suggested that anti-TNFα therapy may be associated with excessive weight gain. AREAS COVERED We performed a nested case/non-case analysis to investigate the anti-TNF-α inhibitor-associated body-changes in the US Food and Drug Administration (FDA) Adverse Event Reporting System (FAERS) database. The risk was expressed as a measure of disproportionality using the reporting odds ratio (ROR) while adjusting for sex, drugs known to cause weight gain and reporter type. We also performed a time-to-onset (TTO) analysis of body weight-related events. RESULTS Infliximab was the most commonly involved TNF-α inhibitor in body weight-related changes, reaching an aROR of 1.42 (95%CI:1. 26; 1.59). An increased risk was especially found in patients affected by rheumatic disorders, both in the adult and pediatric population. The median TTO after the start of anti- TNFα therapy was about 6-7 months for both children and adults. CONCLUSIONS Given the potential effect of these agents on the excess weight gain in IMIDs patients, continuous attention for this side effect with appropriate counseling regarding lifestyle modifications are warranted, especially in those at high risk for obesity.
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Affiliation(s)
- Faizan Mazhar
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
| | - Vera Battini
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
| | - Michele Gringeri
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
| | - Marco Pozzi
- Scientific Institute, IRCCS E. Medea, Bosisio Parini, LC, Italy
| | - Giulia Mosini
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
| | | | - Shahzad Akram
- Pharmaceutical Care Department, King Abdullah Specialist Children Hospital, King Abdul-Aziz Medical City, National Guard Health Affairs, Riyadh, Saudi Arabia
| | | | - Sonia Radice
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
| | - Emilio Clementi
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy.,Scientific Institute, IRCCS E. Medea, Bosisio Parini, LC, Italy
| | - Carla Carnovale
- "Luigi Sacco" University Hospital, Università Di Milano, Milan, Italy
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11
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Su J, Liu X, Li H, Cheng X, Shi S, Li N, Wu J, Xu Y, Liu R, Tian X, Wang H, Wang S. Hypoglycaemic effect and mechanism of an RG-II type polysaccharide purified from Aconitum coreanum in diet-induced obese mice. Int J Biol Macromol 2020; 149:359-370. [DOI: 10.1016/j.ijbiomac.2020.01.209] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2019] [Revised: 01/07/2020] [Accepted: 01/21/2020] [Indexed: 02/06/2023]
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12
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Hill JH, Solt C, Foster MT. Obesity associated disease risk: the role of inherent differences and location of adipose depots. Horm Mol Biol Clin Investig 2018; 33:/j/hmbci.ahead-of-print/hmbci-2018-0012/hmbci-2018-0012.xml. [PMID: 29547393 DOI: 10.1515/hmbci-2018-0012] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2018] [Accepted: 02/09/2018] [Indexed: 02/07/2023]
Abstract
Obesity and associated metabolic co-morbidities are a worldwide public health problem. Negative health outcomes associated with obesity, however, do not arise from excessive adiposity alone. Rather, deleterious outcomes of adipose tissue accumulation are a result of how adipocytes are distributed to individual regions in the body. Due to our increased understanding of the dynamic relationship that exists between specific adipose depots and disease risk, an accurate characterization of total body adiposity as well as location is required to properly evaluate a population's disease risk. Specifically, distinctive tissue depots within the body include the lower body, upper body and abdominal (deep and superficial) subcutaneous regions, as well as visceral (mesenteric and omental) regions. Upper body and visceral adipose tissues are highly associated with metabolic dysfunction and chronic disease development, whereas lower body gluteofemoral subcutaneous adipose tissue imparts protection against diet-induced metabolic derangement. Each adipose depot functions distinctly as an endocrine organ hence it has a different level of impact on health outcomes. Effluent from adipose tissue can modulate the functions of other tissues, whilst receiving differential communication from the rest of the body via central nervous system innervation, metabolites and other signaling molecules. More so, adipose depots contain a diverse reservoir of tissue-resident immune cells that play an integral part in both maintaining tissue homeostasis, as well as propagating metabolically-induced inflammation. Overall, the conceptualization of obesity and associated risks needs updating to reflect the complexities of obesity. We review adipose tissue characteristics that are linked to deleterious or beneficial adipose tissue distributions.
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Affiliation(s)
- Jessica H Hill
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO, USA
| | - Claudia Solt
- Department of Food Science and Human Nutrition, Colorado State University, Fort Collins, CO, USA
| | - Michelle T Foster
- Department of Food Science and Human Nutrition, Colorado State University, 1571 Campus Delivery, 500 West Lake Street, Fort Collins, CO 80523, USA, Phone: +(970) 491-6189, Fax: +(970) 491-3875
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13
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Gonzalez-Franquesa A, Patti ME. Insulin Resistance and Mitochondrial Dysfunction. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2017; 982:465-520. [DOI: 10.1007/978-3-319-55330-6_25] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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14
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Cui B, Gai Z, She X, Wang R, Xi Z. Effects of chronic noise on glucose metabolism and gut microbiota-host inflammatory homeostasis in rats. Sci Rep 2016; 6:36693. [PMID: 27811997 PMCID: PMC5095650 DOI: 10.1038/srep36693] [Citation(s) in RCA: 69] [Impact Index Per Article: 8.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2016] [Accepted: 10/20/2016] [Indexed: 02/06/2023] Open
Abstract
Chronic noise exposure has been implicated in increased risk of diabetes. However, there is limited experimental evidence of the mechanisms linking chronic noise stress and glucose metabolism. We addressed this in the present study by examining glucose metabolism, immune response, and changes in gut microbiota/host inflammatory homeostasis in rats exposed to noise for 30 consecutive days. Chronic noise exposure increased blood glucose and corticosterone levels for at least 14 days after cessation of noise. Stressed rats also exhibited elevated levels of glycogen and triglyceride in the liver and impaired hepatic insulin production via insulin-induced insulin receptor/insulin receptor substrate 1/glycogen synthase kinase 3β signalling, which persisted for 3–14 days after cessation of noise exposure. Chronic noise altered the percentage of Proteobacteria and Actinobacteria in the gut, increasing Roseburia but decreasing Faecalibacterium levels in the cecum relative to controls. Immunoglobulin A, interleukin 1β, and tumor necrosis factor α levels were also elevated in the intestine of these animals, corresponding to noise-induced abnormalities in glucose regulation and insulin sensitivity. These results suggest that lifelong environmental noise exposure could have cumulative effects on diabetes onset and development resulting from alterations in gut microbiota composition and intestinal inflammation.
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Affiliation(s)
- Bo Cui
- Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Zhihui Gai
- Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China.,School of Medicine and Life Sciences, University of Jinan-Shandong Academy of Medical Sciences, Jinan, China.,Shandong academy of occupational health and occupational medicine, Shandong academy of medical sciences, Jinan, China
| | - Xiaojun She
- Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
| | - Rui Wang
- Shandong academy of occupational health and occupational medicine, Shandong academy of medical sciences, Jinan, China
| | - Zhuge Xi
- Department of Occupational Hygiene, Tianjin Institute of Health and Environmental Medicine, Tianjin, China
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Eichelmann F, Schwingshackl L, Fedirko V, Aleksandrova K. Effect of plant-based diets on obesity-related inflammatory profiles: a systematic review and meta-analysis of intervention trials. Obes Rev 2016; 17:1067-1079. [PMID: 27405372 DOI: 10.1111/obr.12439] [Citation(s) in RCA: 121] [Impact Index Per Article: 15.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/09/2016] [Revised: 05/11/2016] [Accepted: 05/23/2016] [Indexed: 12/24/2022]
Abstract
Plant-based dietary interventions have been proposed to reduce obesity induced chronic low-grade inflammation and hence prevent chronic disease risk; however, human evidence remains unclear. This systematic review and meta-analysis of intervention trials aimed to assess the effect of plant-based diets on obesity-related inflammatory biomarker profiles. Medline, EMBASE and Cochrane Central Register of Controlled Trials (CENTRAL) were searched for articles published until January 2016 and mean differences in biomarkers of inflammatory status were assessed for: C-reactive protein (CRP), interleukin-6 (IL-6), tumour necrosis factor-alpha (TNF-ɑ), soluble intercellular adhesion molecule 1 (sICAM), leptin, adiponectin and resistin. Of initially identified 2,583 publications, 29 met the meta-analysis inclusion criteria [a total of 2,689 participants]. Consumption of plant-based diets was associated with a reduction in the mean concentrations of the following biomarkers: CRP [effect size, -0.55 mg/l, 95% confidence intervals (CI): -0.78; -0.32, I2 = 94.4%], IL-6 [effect size, -0.25 ng/l, 95% CI: -0.56; 0.06, I2 = 74%], and, to some degree, sICAM (-25.07 ng/ml [95% CI: -52.32; 2.17, I2 = 93.2%]). No substantial effects were revealed for TNF-ɑ, resistin, adiponectin and leptin. Plant-based diets are associated with an improvement in obesity-related inflammatory profiles and could provide means for therapy and prevention of chronic disease risk.
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Affiliation(s)
- F Eichelmann
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - L Schwingshackl
- Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany
| | - V Fedirko
- Department of Epidemiology, Rollins School of Public Health, Winship Cancer Institute, Emory University, USA
| | - K Aleksandrova
- Nutrition, Immunity and Metabolism Start-up Lab, Department of Epidemiology, German Institute of Human Nutrition Potsdam-Rehbrücke, Nuthetal, Germany.
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16
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Wang W, Yang GJ, Zhang J, Chen C, Jia ZY, Li J, Xu WD. Plasma, urine and ligament tissue metabolite profiling reveals potential biomarkers of ankylosing spondylitis using NMR-based metabolic profiles. Arthritis Res Ther 2016; 18:244. [PMID: 27770826 PMCID: PMC5075188 DOI: 10.1186/s13075-016-1139-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2016] [Accepted: 09/27/2016] [Indexed: 12/31/2022] Open
Abstract
Background Ankylosing spondylitis (AS) is an autoimmune rheumatic disease mostly affecting the axial skeleton. Currently, anti-tumour necrosis factor α (anti-TNF-α) represents an effective treatment for AS that may delay the progression of the disease and alleviate the symptoms if the diagnosis can be made early. Unfortunately, effective diagnostic biomarkers for AS are still lacking; therefore, most patients with AS do not receive timely and effective treatment. The intent of this study was to determine several key metabolites as potential biomarkers of AS using metabolomic methods to facilitate the early diagnosis of AS. Methods First, we collected samples of plasma, urine, and ligament tissue around the hip joint from AS and control groups. The samples were examined by nuclear magnetic resonance spectrometry, and multivariate data analysis was performed to find metabolites that differed between the groups. Subsequently, according to the correlation coefficients, variable importance for the projection (VIP) and P values of the metabolites obtained in the multivariate data analysis, the most crucial metabolites were selected as potential biomarkers of AS. Finally, metabolic pathways involving the potential biomarkers were determined using the Kyoto Encyclopedia of Genes and Genomes (KEGG) database, and the metabolic pathway map was drawn. Results Forty-four patients with AS agreed to provide plasma and urine samples, and 30 provided ligament tissue samples. An equal number of volunteers were recruited for the control group. Multidimensional statistical analysis suggested significant differences between the patients with AS and control subjects, and the models exhibited good discrimination and predictive ability. A total of 20 different metabolites ultimately met the requirements for potential biomarkers. According to KEGG analysis, these marker metabolites were primarily related to fat metabolism, intestinal microbial metabolism, glucose metabolism and choline metabolism pathways, and they were also probably associated with immune regulation. Conclusions Our work demonstrates that the potential biomarkers that were identified appeared to have diagnostic value for AS and deserve to be further investigated. In addition, this work also suggests that the metabolomic profiling approach is a promising screening tool for the diagnosis of patients with AS.
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Affiliation(s)
- Wei Wang
- Department of Orthopedics, Chengdu Military General Hospital, Chengdu city, People's Republic of China
| | - Gen-Jin Yang
- School of Pharmacy, Second Military Medical University, Shanghai city, People's Republic of China
| | - Ju Zhang
- Department of Rheumatology, Changhai Hospital, Shanghai city, People's Republic of China
| | - Chen Chen
- Physical Examination Center, Changhai Hospital, Shanghai city, People's Republic of China
| | - Zhen-Yu Jia
- Department of Orthopedics, Changhai Hospital, Shanghai city, People's Republic of China
| | - Jia Li
- Department of Orthopedics, Changhai Hospital, Shanghai city, People's Republic of China
| | - Wei-Dong Xu
- Department of Orthopedics, Changhai Hospital, Shanghai city, People's Republic of China.
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17
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Reynolds K, Novosad B, Hoffhines A, Gipson J, Johnson J, Peters J, Gonzalez F, Gimble J, Hill M. Pretreatment with troglitazone decreases lethality during endotoxemia in mice. ACTA ACUST UNITED AC 2016. [DOI: 10.1177/09680519020080040701] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Abstract
Troglitazone is an oral antidiabetic drug that is a ligand for peroxisome proliferator activated receptor γ (PPARγ). Based on other studies that have implicated an immunosuppressive role for PPARγ during inflammatory responses, we hypothesized that troglitazone treatment would improve survival in a murine model of endotoxemia and that the protective effect would be mediated by decreased expression of inflammatory mediators. C57Bl/6N x Sv/129 (wild-type [WT]) or PPARα null mice treated for 2 weeks with dietary troglitazone (0.1%) had significantly fewer deaths and a higher LD 50 value compared to control-fed mice when challenged with lipopolysaccharide (LPS). PPARα null mice were more sensitive to the lethal effects of LPS as evidenced by a 2-fold lower LD 50 (6.6 mg/kg) compared to WT mice (14.6 mg/kg). Troglitazone treatment had no significant effect on LPS-induced plasma TNF, glucose, or nitric oxide levels in WT or PPARα null mice at any of the time points examined. However, troglitazone treatment significantly reduced LPS-induced plasma IL-6 levels in both WT and PPARα null mice. The results of these studies suggest that troglitazone treatment protects mice against a lethal challenge of LPS, but whether or not this effect is mediated through decreased expression of inflammatory mediators remains unclear.
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Affiliation(s)
- Karen Reynolds
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA, Department of Radiologic Technology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Bo Novosad
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA, Department of Radiologic Technology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
| | - Adam Hoffhines
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA
| | - Jenny Gipson
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA
| | - Jared Johnson
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA
| | - Jeffrey Peters
- Department of Veterinary Science, Pennsylvania State University, University Park, Pennsylvania, USA
| | - Frank Gonzalez
- Laboratory of Metabolism, NCI, National Institutes of Health, Bethesda, Maryland, USA
| | - Jeffrey Gimble
- Tissue Engineering Program, Artecell Inc., Durham, North Carolina, USA
| | - Molly Hill
- Department of Natural Sciences, Oklahoma Christian University, Oklahoma City, Oklahoma, USA, , Department of Radiologic Technology, University of Oklahoma Health Sciences Center, Oklahoma City, Oklahoma, USA
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18
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Wang J, Cheng X, Zhang X, Cheng J, Xu Y, Zeng J, Zhou W, Zhang Y. The anti-aging effects of LW-AFC via correcting immune dysfunctions in senescence accelerated mouse resistant 1 (SAMR1) strain. Oncotarget 2016; 7:26949-65. [PMID: 27105505 PMCID: PMC5053624 DOI: 10.18632/oncotarget.8877] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2016] [Accepted: 04/03/2016] [Indexed: 12/18/2022] Open
Abstract
Although there were considerable advances in the anti-aging medical field, it is short of therapeutic drug for anti-aging. Mounting evidence indicates that the immunosenescence is the key physiopathological mechanism of aging. This study showed the treatment of LW-AFC, an herbal medicine, decreased the grading score of senescence, increased weight, prolonged average life span and ameliorated spatial memory impairment in 12- and 24-month-old senescence accelerated mouse resistant 1 (SAMR1) strain. And these anti-aging effects of LW-AFC were more excellent than melatonin. The administration of LW-AFC enhanced ConA- and LPS-induced splenocyte proliferation in aged SAMR1 mice. The treatment of LW-AFC not only reversed the decreased the proportions of helper T cells, suppressor T cells and B cells, the increased regulatory T cells in the peripheral blood of old SAMR1 mice, but also could modulate the abnormal secretion of IL-1β, IL-2, IL-6, IL-17, IL-23, GM-CSF, IFN-γ, TNF-α, TNF-β, RANTES, eotaxin, MCP-1, IL-4, IL-5, IL-10 and G-CSF. These data indicated that LW-AFC reversed the immunosenescence status by restoring immunodeficiency and decreasing chronic inflammation and suggested LW-AFC may be an effective anti-aging agent.
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Affiliation(s)
- Jianhui Wang
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Xiaorui Cheng
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Xiaorui Zhang
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Junping Cheng
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Yiran Xu
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Ju Zeng
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Wenxia Zhou
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
| | - Yongxiang Zhang
- Department of Neuroimmunopharmacology, Beijing Institute of Pharmacology and Toxicology, Beijing, China
- State Key Laboratory of Toxicology and Medical Countermeasures, Beijing, China
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Wei Y, Zhang JJ, Li Z, Gow A, Chung KF, Hu M, Sun Z, Zeng L, Zhu T, Jia G, Li X, Duarte M, Tang X. Chronic exposure to air pollution particles increases the risk of obesity and metabolic syndrome: findings from a natural experiment in Beijing. FASEB J 2016; 30:2115-22. [PMID: 26891735 DOI: 10.1096/fj.201500142] [Citation(s) in RCA: 158] [Impact Index Per Article: 19.8] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/08/2015] [Accepted: 01/31/2016] [Indexed: 01/05/2023]
Abstract
Epidemiologic evidence suggests that air pollution is a risk factor for childhood obesity. Limited experimental data have shown that early-life exposure to ambient particles either increases susceptibility to diet-induced weight gain in adulthood or increases insulin resistance, adiposity, and inflammation. However, no data have directly supported a link between air pollution and non-diet-induced weight increases. In a rodent model, we found that breathing Beijing's highly polluted air resulted in weight gain and cardiorespiratory and metabolic dysfunction. Compared to those exposed to filtered air, pregnant rats exposed to unfiltered Beijing air were significantly heavier at the end of pregnancy. At 8 wk old, the offspring prenatally and postnatally exposed to unfiltered air were significantly heavier than those exposed to filtered air. In both rat dams and their offspring, after continuous exposure to unfiltered air we observed pronounced histologic evidence for both perivascular and peribronchial inflammation in the lungs, increased tissue and systemic oxidative stress, dyslipidemia, and an enhanced proinflammatory status of epididymal fat. Results suggest that TLR2/4-dependent inflammatory activation and lipid oxidation in the lung can spill over systemically, leading to metabolic dysfunction and weight gain.-Wei, Y., Zhang, J., Li, Z., Gow, A., Chung, K. F., Hu, M., Sun, Z., Zeng, L., Zhu, T., Jia, G., Li, X., Duarte, M., Tang, X. Chronic exposure to air pollution particles increases the risk of obesity and metabolic syndrome: findings from a natural experiment in Beijing.
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Affiliation(s)
- Yongjie Wei
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China; State Key Laboratory of Environmental Criteria, and Risk Assessment and Environmental Standards Institute, Chinese Research Academy of Environmental Sciences, Beijing, China
| | - Junfeng Jim Zhang
- Nicholas School of the Environment and Duke Global Health Institute, Duke University, Durham, North Carolina, USA; Duke Kunshan University, Kunshan, China;
| | - Zhigang Li
- State Key Laboratory of Environmental Criteria, and Risk Assessment and Environmental Standards Institute, Chinese Research Academy of Environmental Sciences, Beijing, China
| | - Andrew Gow
- Department of Toxicology and Pharmacology, Rutgers University, Piscataway, New Jersey, USA
| | - Kian Fan Chung
- National Heart and Lung Institute, Imperial College, London, United Kingdom
| | - Min Hu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
| | - Zhongsheng Sun
- Beijing Institutes of Life Science, Chinese Academy of Sciences, Beijing, China; and
| | - Limin Zeng
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
| | - Tong Zhu
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China
| | - Guang Jia
- Department of Occupational and Environmental Health Sciences, School of Public Health, Peking University, Beijing, China
| | - Xiaoqian Li
- State Key Laboratory of Environmental Criteria, and Risk Assessment and Environmental Standards Institute, Chinese Research Academy of Environmental Sciences, Beijing, China
| | - Marlyn Duarte
- Nicholas School of the Environment and Duke Global Health Institute, Duke University, Durham, North Carolina, USA
| | - Xiaoyan Tang
- State Key Joint Laboratory of Environmental Simulation and Pollution Control, College of Environmental Sciences and Engineering, Peking University, Beijing, China;
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Jacobson TA, Maki KC, Orringer CE, Jones PH, Kris-Etherton P, Sikand G, La Forge R, Daniels SR, Wilson DP, Morris PB, Wild RA, Grundy SM, Daviglus M, Ferdinand KC, Vijayaraghavan K, Deedwania PC, Aberg JA, Liao KP, McKenney JM, Ross JL, Braun LT, Ito MK, Bays HE, Brown WV. National Lipid Association Recommendations for Patient-Centered Management of Dyslipidemia: Part 2. J Clin Lipidol 2015; 9:S1-122.e1. [DOI: 10.1016/j.jacl.2015.09.002] [Citation(s) in RCA: 315] [Impact Index Per Article: 35.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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21
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Camer D, Yu Y, Szabo A, Huang XF. The molecular mechanisms underpinning the therapeutic properties of oleanolic acid, its isomer and derivatives for type 2 diabetes and associated complications. Mol Nutr Food Res 2014; 58:1750-9. [PMID: 24740831 DOI: 10.1002/mnfr.201300861] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2013] [Revised: 03/04/2014] [Accepted: 03/06/2014] [Indexed: 01/02/2023]
Abstract
Recent research has uncovered the molecular mechanisms responsible for the therapeutic properties of oleanolic acid (OA), its isomer ursolic acid (UA), and derivatives. In particular, recent reports have highlighted the benefits of these compounds in the prevention and treatment of type 2 diabetes and associated life-threatening complications, such as nonalcoholic fatty liver disease, nephropathy, retinopathy, and atherosclerosis. The prevalence of type 2 diabetes is of major concern since it is reaching global epidemic levels. Treatments targeting the signaling pathways altered in type 2 diabetes are being actively investigated, and OA and UA in natural and derivative forms are potential candidates to modulate these pathways. We will explore the findings from in vitro and in vivo studies showing that these compounds: (i) improve insulin signaling and reduce hyperglycemia; (ii) reduce oxidative stress by upregulating anti-oxidants and; (iii) reduce inflammation by inhibiting proinflammatory signaling. We will discuss the molecular mechanisms underpinning these therapeutic properties in this review in order to provide a rationale for the future use of OA, UA, and their derivatives for the prevention and treatment of type 2 diabetes and associated comorbidities.
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Affiliation(s)
- Danielle Camer
- Centre for Translational Neuroscience, School of Medicine, Illawarra Health and Medical Research Institute, University of Wollongong, NSW, Australia
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22
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Paragh G, Seres I, Harangi M, Fülöp P. Dynamic interplay between metabolic syndrome and immunity. ADVANCES IN EXPERIMENTAL MEDICINE AND BIOLOGY 2014; 824:171-90. [PMID: 25039000 DOI: 10.1007/978-3-319-07320-0_13] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Obesity and its co-morbidities as metabolic syndrome, type 2 diabetes mellitus and cardiovascular diseases are major health problems worldwide. Several reports indicated that nutrient excess and metabolic syndrome are linked with altered immune response. Indeed, metabolic syndrome is characterized by insulin resistance and chronic low-grade inflammation, which conditions are the consequences of the complex interaction between adipocytes and immune cells. Enlarged white adipose tissue is infiltrated by immune cells and secretes various bioactive substances, like adipokines, cytokines and other inflammatory mediators. Due to its special architecture in which metabolic and immune cells are in intimate proximity, metabolic and immunologic pathways are closely integrated in adipose tissue. With the contribution of altered gut microbiota, adipokines and cytokines modulate insulin signaling and immune response leading to adipose tissue inflammation and systemic insulin resistance. In this chapter, we focus on the cellular and molecular mechanisms that lead to impaired insulin sensitivity and chronic low-grade inflammation in obesity. We also detail the potential role of adipokines and immune cells in this deleterious process, and the concerns of vaccination in metabolic syndrome. Finally, we address the links between obesity and gut microbiota as an emerging new field of interest, and scratch the surface of potential therapeutic opportunities.
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Affiliation(s)
- György Paragh
- Division of Metabolism, Department of Internal Medicine, Faculty of Medicine, University of Debrecen, Nagyerdei krt. 98, Debrecen, H-4032, Hungary,
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Michaud M, Balardy L, Moulis G, Gaudin C, Peyrot C, Vellas B, Cesari M, Nourhashemi F. Proinflammatory cytokines, aging, and age-related diseases. J Am Med Dir Assoc 2013; 14:877-82. [PMID: 23792036 DOI: 10.1016/j.jamda.2013.05.009] [Citation(s) in RCA: 681] [Impact Index Per Article: 61.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2013] [Accepted: 05/08/2013] [Indexed: 12/18/2022]
Abstract
Inflammation is a physiological process that repairs tissues in response to endogenous or exogenous aggressions. Nevertheless, a chronic state of inflammation may have detrimental consequences. Aging is associated with increased levels of circulating cytokines and proinflammatory markers. Aged-related changes in the immune system, known as immunosenescence, and increased secretion of cytokines by adipose tissue, represent the major causes of chronic inflammation. This phenomenon is known as "inflamm-aging." High levels of interleukin (IL)-6, IL-1, tumor necrosis factor-α, and C-reactive protein are associated in the older subject with increased risk of morbidity and mortality. In particular, cohort studies have indicated TNF-α and IL-6 levels as markers of frailty. The low-grade inflammation characterizing the aging process notably concurs at the pathophysiological mechanisms underlying sarcopenia. In addition, proinflammatory cytokines (through a variety of mechanisms, such as platelet activation and endothelial activation) may play a major role in the risk of cardiovascular events. Dysregulation of the inflammatory pathway may also affect the central nervous system and be involved in the pathophysiological mechanisms of neurodegenerative disorders (eg, Alzheimer disease).The aim of the present review was to summarize different targets of the activity of proinflammatory cytokines implicated in the risk of pathological aging.
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Affiliation(s)
- Martin Michaud
- Department of Geriatric Medicine, Gérontopôle de Toulouse, Toulouse University Hospital, Toulouse, France.
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Abstract
Insulin resistance (IR) is now considered as a chronic and low level inflammatory condition. It is closely related to altered glucose tolerance, hypertriglyceridemia, abdominal obesity, and coronary heart disease. IR is accompanied by the increase in the levels of inflammatory cytokines like interleukin-1 and 6, tumor necrosis factor-α. These inflammatory cytokines also play a crucial part in pathogenesis and progression of insulin resistance. Periodontitis is the commonest of oral diseases, affecting tooth investing tissues. Pro-inflammatory cytokines are released in the disease process of periodontitis. Periodontitis can be attributed with exacerbation of IR. Data in the literature supports a "two way relationship" between diabetes and periodontitis. Periodontitis is asymptomatic in the initial stages of disease process and it often escapes diagnosis. This review presents the blurred nexus between periodontitis and IR, underlining the pathophysiology of the insidious link. The knowledge of the association between periodontitis and IR can be valuable in planning effectual treatment modalities for subjects with altered glucose homeostasis and diabetics. Presently, the studies supporting this association are miniscule. Further studies are mandatory to substantiate the role of periodontitis in the deterioration of IR.
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Affiliation(s)
- Abhijit N. Gurav
- Department of Periodontics, Tatyasaheb Kore Dental College & Research Centre, Kolhapur, India
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Abstract
Obesity shares with most chronic diseases the presence of an inflammatory component, which accounts for the development of metabolic disease and other associated health alterations. This inflammatory state is reflected in increased circulating levels of pro-inflammatory proteins, and it occurs not only in adults but also in adolescents and children. The chronic inflammatory response has its origin in the links existing between the adipose tissue and the immune system. Obesity, like other states of malnutrition, is known to impair the immune function, altering leucocyte counts as well as cell-mediated immune responses. In addition, evidence has arisen that an altered immune function contributes to the pathogenesis of obesity. This review attempts to briefly comment on the various plausible explanations that have been proposed for the phenomenon: (1) the obesity-associated increase in the production of leptin (pro-inflammatory) and the reduction in adiponectin (anti-inflammatory) seem to affect the activation of immune cells; (2) NEFA can induce inflammation through various mechanisms (such as modulation of adipokine production or activation of Toll-like receptors); (3) nutrient excess and adipocyte expansion trigger endoplasmic reticulum stress; and (4) hypoxia occurring in hypertrophied adipose tissue stimulates the expression of inflammatory genes and activates immune cells. Interestingly, data suggest a greater impact of visceral adipose tissue and central obesity, rather than total body fat, on the inflammatory process. In summary, there is a positive feedback loop between local inflammation in adipose tissue and altered immune response in obesity, both contributing to the development of related metabolic complications.
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Osborn O, Olefsky JM. The cellular and signaling networks linking the immune system and metabolism in disease. Nat Med 2012; 18:363-74. [PMID: 22395709 DOI: 10.1038/nm.2627] [Citation(s) in RCA: 1123] [Impact Index Per Article: 93.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
It is now recognized that obesity is driving the type 2 diabetes epidemic in Western countries. Obesity-associated chronic tissue inflammation is a key contributing factor to type 2 diabetes and cardiovascular disease, and a number of studies have clearly demonstrated that the immune system and metabolism are highly integrated. Recent advances in deciphering the various cellular and signaling networks that participate in linking the immune and metabolic systems together have contributed to understanding of the pathogenesis of metabolic diseases and may also inform new therapeutic strategies based on immunomodulation. Here we discuss how these various networks underlie the etiology of the inflammatory component of insulin resistance, with a particular focus on the central roles of macrophages in adipose tissue and liver.
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Affiliation(s)
- Olivia Osborn
- Department of Medicine, Division of Endocrinology and Metabolism, University of California-San Diego, La Jolla, California, USA
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Zarfeshani A, Khaza’ai H, Mohd Ali R, Hambali Z, Wahle KWJ, Mutalib MSA. Effect of Lactobacillus casei on the Production of Pro-Inflammatory Markers in Streptozotocin-Induced Diabetic Rats. Probiotics Antimicrob Proteins 2011; 3:168-74. [DOI: 10.1007/s12602-011-9080-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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Abstract
Tumor necrosis factor-alpha (TNF-α) is recognized as a cytokine because of its involvement in inflammation-mediated biological defense functions. Although TNF-α is primarily produced by macrophages, it is also produced by other cells, including lymphocytes, Kupffer cells, natural killer cells and adipocytes. While TNF-α has diverse immune system functions, including antitumor activity, antimicrobial activity and mediation of inflammation, it also regulates a number of physiological functions, including appetite, fever, energy metabolism and endocrine activity. Factors such as viruses, parasites, other cytokines, and endotoxins induce TNF-α production. In combination with other cytokines, TNF-α plays a clinically important role in cattle by mediating immune inflammatory responses such as mastitis and endotoxic shock. It has been reported that cytokines such as TNF-α are involved in metabolic disease such as acidosis. On the other hand, several data suggest that lactoferrin (LF) acts to prevent the release of a number of inflammatory mediators from various activated cells, and further suggest that the prophylactic effect of LF involves inhibition of cytokine production, including TNF-α, that are principal mediators of the inflammatory response leading to death from toxic shock. This review discusses the role of TNF-α in pathological conditions in cattle, including infections and metabolic diseases caused by perturbation of metabolism and endocrine functions.
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Affiliation(s)
- Shiro Kushibiki
- National Institute of Livestock and Grassland Science, Tsukuba, Japan.
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Mei M, Zhao L, Li Q, Chen Y, Huang A, Varghese Z, Moorhead JF, Zhang S, Powis SH, Li Q, Ruan XZ. Inflammatory stress exacerbates ectopic lipid deposition in C57BL/6J mice. Lipids Health Dis 2011; 10:110. [PMID: 21718499 PMCID: PMC3146847 DOI: 10.1186/1476-511x-10-110] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2011] [Accepted: 06/30/2011] [Indexed: 11/10/2022] Open
Abstract
Background Chronic systemic inflammation and abnormal free fatty acid metabolism are closely related to ectopic lipid deposition. In this study, we investigate if inflammation tissue-specifically disrupts lipogenesis and lipolysis in nonadipose tissues and adipose tissue, resulting in ectopic lipid deposition in C57BL/6J mice. Methods We used casein injection in C57BL/6J mice to induce a chronic systemic inflammatory stress in vivo. Serum was analyzed for free fatty acid and cytokines. Insulin sensitivities were evaluated by glucose and insulin tolerance tests. Liver, muscle, adipose tissues were taken for lipid analysis. Real-time polymerase chain reaction and western blotting were used to examine the gene and protein expression of molecules involved in adipogenesis and lipolysis in tissues. Results Casein injection elevated serum levels of IL-6 and SAA in mice, which are associated with increased lipid accumulation in liver and muscle, suggesting that chronic systemic inflammation induces ectopic lipid deposition in nonadipose tissues. The inflammatory stress upregulated mRNA and protein expression of sterol regulatory element binding protein 1, fatty acid synthase, and acetyl CoA carboxylase alpha, while inhibited these molecules expression in adipose. Interestingly, in the same experimental setting, inflammation increased triglyceride lipase and hormone-sensitive lipase expression in white adipose tissue. Inflammation also induced insulin resistance and increased serum free fatty acid levels in C57BL/6J mice. Conclusions Chronic systemic inflammation increased lipogenesis in nonadipose tissues and lipolysis in white adipose tissue, resulting in ectopic lipid deposition in nonadipose tissues. This disturbed free fatty acid homeostasis and caused insulin resistance in C57BL/6J mice.
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Affiliation(s)
- Mei Mei
- Centre for Lipid Research, Key Laboratory of Molecular Biology on Infectious Diseases, Ministry of Education, The Second Affiliated Hospital, Chongqing Medical University, P.R. China
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Popko K, Gorska E, Demkow U. Influence of interleukin-6 and G174C polymorphism in IL-6 gene on obesity and energy balance. Eur J Med Res 2011; 15 Suppl 2:123-7. [PMID: 21147639 PMCID: PMC4360272 DOI: 10.1186/2047-783x-15-s2-123] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/17/2023] Open
Abstract
Obesity is a multifactor disease with a very complicated etiology. Genetic factors play an important role in the development of primary obesity. They may be responsible for up to 40% of causes leading to obesity. There are a great number of genes affecting food intake and energy expenditure. Serious consequences accompanying obesity, e.g., type 2 diabetes and lipid abnormalities may be caused by increased level of proinflammatory cytokines, such as IL-1, IL-6, and TNF. It is possible that polymorphisms located in cytokine genes affect the level of protein expression. It is known that IL-6 plays a role in lipid metabolism and energy expenditure. The polymorphism found in point 174 (G174C) of a promoter region of IL-6 gene affects the level of interleukin-6 expression and, consequently, may lead to obesity and correlated conditions.
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Affiliation(s)
- Katarzyna Popko
- Department of Laboratory Diagnostics, Warsaw Medical University, Warsaw, Poland.
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Popko K, Gorska E, Stelmaszczyk-Emmel A, Plywaczewski R, Stoklosa A, Gorecka D, Pyrzak B, Demkow U. Proinflammatory cytokines Il-6 and TNF-α and the development of inflammation in obese subjects. Eur J Med Res 2011; 15 Suppl 2:120-2. [PMID: 21147638 PMCID: PMC4360270 DOI: 10.1186/2047-783x-15-s2-120] [Citation(s) in RCA: 193] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The development of obesity and related disorders, e.g., type II diabetes (T2D), hypertension, and metabolic disturbances is strongly related to increased levels in proinflammatory cytokines (IL-1, IL-6, and TNF-α). Both IL-6 and TNF-α are secreted by adipocytes and their concentration correlates with the percentage and distribution of fat tissue in the body. Both cytokines are the main factors responsible for the induction of acute phase proteins production (e.g., CRP) and to inflammatory state. OBJECTIVE To compare of TNF-α and IL-6 concentrations in serum from obese subjects with those in subjects with normal BMI and to analyze the relation between TNF-α, IL-6, BMI and the inflammatory state as measured by the level of CRP. MATERIAL AND METHODS The study included 80 obese subject (54 males and 26 females) BMI >25 kg/m⊃2. A control group consisted of 53 healthy subjects (24 males and 29 females) with BMI <25 kg/m⊃2. To determine the blood plasma concentration of IL-6 and TNF, commercial ELISA assay kits were used. RESULTS The concentration of IL-6 was lower in the control compared with the obese patients, but a significance difference concerned only female subjects (P = 0.001). TNF-α concentration was significantly higher in all obese subjects (P<0.001). A higher level of this cytokine was also found in patients with obesity suffering from T2DM. A positive correlation was present between IL-6 and TNF-α concentrations. Only did the IL-6 level correlate with the concentration of CRP in serum. CONCLUSIONS The study confirmed that increased inflammatory cytokines lead to the persistence of inflammation in obese subjects. However, some other factors, such as gender, may contribute to the development of obesity-related inflammatory states.
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Affiliation(s)
- Katarzyna Popko
- Department of Laboratory Diagnostics, Warsaw Medical University, Warsaw, Poland.
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Popko K, Górska E, Pyrzak B, Telmaszczyk-Emmel A, Wisniewska A, Majcher A, Wasik M, Demkow U. Influence of proinflammatory cytokine gene polymorphism on childhood obesity. Eur J Med Res 2010; 14 Suppl 4:59-62. [PMID: 20156727 PMCID: PMC3521345 DOI: 10.1186/2047-783x-14-s4-59] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Obesity development is a complex process which can be influenced by genetic predisposition modified by environmental factors. Nowadays, the problem of overweight and obesity, including related complications, occurs in increasingly younger children. Thus, there is a need for new genetic markers of increased risk of excessive body mass. OBJECTIVE The aim of the present study was to examine the relation between polymorphisms located in promoter regions of IL-1beta, IL-6, and TNF-alpha genes and obesity development in children. Fifty obese and 55 normal weighing children were enrolled into the study. Genetic examination was performed using PCR-RFLP technique. RESULTS We found a relation between G174C polymorphism in IL-6 gene and G308A in TNF-alpha gene with the occurrence of obesity. Allele A in G308A was more frequent in the obese group than in the control one (P=0.04). The presence of allele C in promoter region of IL-6 gene was more frequent in obese children and connected with a statistically significant increase in the sum of 10 skin fold thickness measurements (P=0.03). CONCLUSIONS The polymorphism C3954T in IL-1beta gene showed no such relation. The examined polymorphisms of proinflammatory cytokines play a role in the regulation of body mass through their influence on metabolism and energetic homeostasis.
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Affiliation(s)
- K Popko
- Department of Laboratory Diagnostics and Clinical Immunology of the Developmental Age, Warsaw Medical University, Warsaw, Poland.
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KUSHIBIKI S, SHINGU H, KOMATSU T, ITOH F, MORIYA N, TOUNO E, OSHIBE A, HODATE K. Influence of orally administered bovine lactoferrin on lipid metabolism in lipopolysaccharide-injected preruminant calves. Anim Sci J 2009; 80:258-64. [DOI: 10.1111/j.1740-0929.2009.00642.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Lucas S, Verwaerde C, Wolowczuk I. Is the Adipose Tissue the Key Road to Inflammation? ACTA ACUST UNITED AC 2009. [DOI: 10.4137/iii.s2145] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
Affiliation(s)
- Stéphanie Lucas
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
| | - Claudie Verwaerde
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
| | - Isabelle Wolowczuk
- Laboratoire de NeuroImmunoEndocrinologie Institut Pasteur de Lille, BP447 and IFR 142 1, rue A. Calmette Lille, F-59019, France
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Changes in the peripheral blood transcriptome associated with occupational benzene exposure identified by cross-comparison on two microarray platforms. Genomics 2009; 93:343-9. [PMID: 19162166 DOI: 10.1016/j.ygeno.2008.12.006] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2008] [Revised: 12/02/2008] [Accepted: 12/15/2008] [Indexed: 12/12/2022]
Abstract
Benzene is an established cause of leukemia, and possibly lymphoma, in humans, but the underlying molecular pathways remain largely undetermined. We used two microarray platforms to identify global gene expression changes associated with well-characterized occupational benzene exposure in the peripheral blood mononuclear cells (PBMC) of a population of shoe-factory workers. Differential expression of 2692 genes (Affymetrix) and 1828 genes (Illumina) was found and the concordance was 50% (based on an average fold-change > or =1.3 from the two platforms), with similar expression ratios among the concordant genes. Four genes (CXCL16, ZNF331, JUN and PF4), which we previously identified by microarray and confirmed by real-time PCR, were among the top 100 genes identified by both platforms in the current study. Gene ontology analysis showed overrepresentation of genes involved in apoptosis among the concordant genes while pathway analysis identified pathways related to lipid metabolism. The two-platform approach allows for robust changes in the PBMC transcriptome of benzene-exposed individuals to be identified.
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Imig JD, Zhao X, Dey A, Shaw M. CYP450, COX-2 and Obesity Related Renal Damage. Toxicol Mech Methods 2008; 15:125-36. [DOI: 10.1080/15376520590918856] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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38
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Önde ME, Top C, Öncül O. The Correlation of Insulin Resistance With Serum Tumor Necrosis Factor-Alpha Levels in Patients With Rheumatoid Arthritis. ACTA ACUST UNITED AC 2008. [DOI: 10.1097/ten.0b013e31817ffea2] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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39
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Regional adipose tissue and lipid and lipoprotein levels in HIV-infected women. J Acquir Immune Defic Syndr 2008; 48:35-43. [PMID: 18197118 DOI: 10.1097/qai.0b013e318164227f] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
BACKGROUND HIV infection and antiretroviral therapy are associated with dyslipidemia, but the association between regional body fat and lipid levels is not well described. METHODS Multivariable linear regression analyzed the association between magnetic resonance imaging-measured regional adipose tissue and fasting lipids in 284 HIV-infected and 129 control women. RESULTS Among African Americans, HIV-infected women had higher triglyceride (116 vs. 83 mg/dL; P < 0.001), similar high-density lipoprotein (HDL; 52 vs. 50 mg/dL; P = 0.60), and lower low-density lipoprotein (LDL; 99 vs. 118 mg/dL; P = 0.008) levels than controls. Among whites, HIV-infected women had higher triglyceride (141 vs. 78 mg/dL; P < 0.001), lower HDL (46 vs. 57 mg/dL; P < 0.001), and slightly lower LDL (100 vs. 107 mg/dL; P = 0.059) levels than controls. After adjustment for demographic and lifestyle factors, the highest tertile of visceral adipose tissue (VAT) was associated with higher triglyceride (+85%, 95% confidence interval [CI]: 55 to 121) and lower HDL (-9%, 95% CI: -18 to 0) levels in HIV-infected women; the highest tertile of leg subcutaneous adipose tissue (SAT) was associated with lower triglyceride levels in HIV-infected women (-28%, 95% CI: -41 to -11) and controls (-39%, 95% CI: -5 to -18). After further adjustment for adipose tissue, HIV infection remained associated with higher triglyceride (+40%, 95% CI: 21 to 63) and lower LDL (-17%, 95% CI: -26 to -8) levels, whereas HIV infection remained associated with lower HDL levels (-21%, 95% CI: -29 to -12) in whites but not in African Americans (+8%, 95% CI: -2 to 19). CONCLUSIONS HIV-infected white women are more likely to have proatherogenic lipid profiles than HIV-infected African American women. Less leg SAT and more VAT are important factors associated with adverse lipid levels. HIV-infected women may be at particular risk for dyslipidemia because of the risk for HIV-associated lipoatrophy.
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Qin B, Anderson RA, Adeli K. Tumor necrosis factor-alpha directly stimulates the overproduction of hepatic apolipoprotein B100-containing VLDL via impairment of hepatic insulin signaling. Am J Physiol Gastrointest Liver Physiol 2008; 294:G1120-9. [PMID: 18372392 DOI: 10.1152/ajpgi.00407.2007] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Insulin-resistant states are commonly associated with both increased circulating levels of tumor necrosis factor (TNF)-alpha and hepatic overproduction of very low density lipoproteins (VLDL). Here, we provide evidence that increased TNF-alpha can directly stimulate the hepatic assembly and secretion of apolipoprotein B (apoB) 100-containing VLDL(1), using the Syrian golden hamster, an animal model that closely resembles humans in hepatic VLDL-apoB100 metabolism. In vivo TNF-alpha infusion for 4 h in chow-fed hamsters induced whole-body insulin resistance on the basis of euglycemic hyperinsulinemic clamp studies. Immunoprecipitation and immunoblotting analysis of livers from TNF-alpha-treated hamsters indicated decreased tyrosine phosphorylation of insulin receptor (IR)-beta, IR substrate-1 (Tyr), Akt (Ser(473)), p38, ERK1/2, and JNK but increased serine phosphorylation of IRS-1 (Ser(307)) and Shc. TNF-alpha infusion also significantly increased hepatic production of total circulating apoB100 and VLDL-apoB100 in both fasting and postprandial (fat load) states. Ex vivo experiments, using cultured primary hepatocytes from hamsters, also showed TNF-alpha-induced VLDL-apoB100 oversecretion, an effect that was blocked by TNF receptor 2 antibody. Unexpectedly, TNF-alpha decreased the sterol regulatory element-binding protein-1c mass and mRNA levels but significantly increased microsomal triglyceride transfer protein mass and mRNA levels in primary hepatocytes. In summary, these data provide direct evidence that TNF-alpha induces whole-body insulin resistance and impairs hepatic insulin signaling accompanied by overproduction of apoB100-containing VLDL particles, an effect likely mediated via TNF receptor 2.
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Affiliation(s)
- Bolin Qin
- Department of Laboratory Medicine and Pathobiology, The Hospital for Sick Children, University of Toronto, Toronto, ON, Canada
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Vilarrasa N, Vendrell J, Sánchez-Santos R, Broch M, Megia A, Masdevall C, Gomez N, Soler J, Pujol J, Bettónica C, Aranda H, Gómez JM. Effect of weight loss induced by gastric bypass on proinflammatory interleukin-18, soluble tumour necrosis factor-alpha receptors, C-reactive protein and adiponectin in morbidly obese patients. Clin Endocrinol (Oxf) 2007; 67:679-86. [PMID: 17608757 DOI: 10.1111/j.1365-2265.2007.02945.x] [Citation(s) in RCA: 65] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
OBJECTIVE Interleukin-18 (IL-18) is a potent proinflammatory cytokine whose role in human obesity has recently been suggested. The aim of our study was to analyse in morbidly obese patients undergoing gastric bypass, the relationship of IL-18 with insulin resistance and with proinflammatory cytokines (tumour necrosis factor-alpha receptors, sTNFR), C-reactive protein (CRP) and with adiponectin. DESIGN Observational and prospective study. PATIENTS Sixty-five morbidly obese patients, aged 45 +/- 8.9 years, were studied before and 12 months after gastric bypass. MEASUREMENTS We analysed plasma concentrations of IL-18, sTNFR, CRP and adiponectin. RESULTS Plasma concentrations of sTNFR2, IL-18 and CRP were decreased and adiponectin significantly increased after bypass surgery. In the multiple regression analysis, preoperative values of IL-18 remained significantly associated with preoperative triglycerides (beta = 0.47, P = 0.005) and TNFR2 (beta = 0.47, P = 0.004). R(2) for the model = 0.38. Postoperative IL-18 concentrations in the multiple regression analysis were significantly associated with postoperative homeostasis model assessment of insulin resistance (HOMA-IR) (beta = 0.092, P = 0.019) and triglycerides (beta = 0.40, P = 0.036). R(2) for the model = 0.46. IL-18 did not correlate with body mass index, fat mass, fat-free mass or body fat. No relationship was either found between adiponectin and IL-18, TNFR1 and -2 and CRP. CONCLUSIONS Massive weight loss induced by gastric bypass reduces IL-18, TNFR2 and CRP. IL-18 might be a marker of the chronic inflammatory process underlying insulin resistance but its lack of association with anthropometric and body composition parameters does not support a major secretion by human adipocytes. IL-18 and sTNFR1 and -2 do not play a main role in the inhibition of the secretion of adiponectin.
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MESH Headings
- Adiponectin/blood
- Adult
- C-Reactive Protein/analysis
- Cholesterol, HDL/blood
- Cholesterol, LDL/blood
- Female
- Gastric Bypass
- Humans
- Interleukin-18/blood
- Male
- Middle Aged
- Obesity, Morbid/blood
- Obesity, Morbid/immunology
- Obesity, Morbid/surgery
- Prospective Studies
- Receptors, Tumor Necrosis Factor/blood
- Receptors, Tumor Necrosis Factor, Type I/blood
- Receptors, Tumor Necrosis Factor, Type II/blood
- Regression Analysis
- Weight Loss
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Affiliation(s)
- N Vilarrasa
- Endocrinology and Diabetes Unit, Hospital Universitari de Bellvitge, Barcelona, Spain.
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Goossens GH. The role of adipose tissue dysfunction in the pathogenesis of obesity-related insulin resistance. Physiol Behav 2007; 94:206-18. [PMID: 18037457 DOI: 10.1016/j.physbeh.2007.10.010] [Citation(s) in RCA: 356] [Impact Index Per Article: 20.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/24/2007] [Revised: 10/02/2007] [Accepted: 10/11/2007] [Indexed: 02/06/2023]
Abstract
Research of the past decade has increased our understanding of the role adipose tissue plays in health and disease. Adipose tissue is now recognized as a highly active metabolic and endocrine organ. Adipocytes are of importance in buffering the daily influx of dietary fat and exert autocrine, paracrine and/or endocrine effects by secreting a variety of adipokines. The normal function of adipose tissue is disturbed in obesity, and there is accumulating evidence to suggest that adipose tissue dysfunction plays a prominent role in the development and/or progression of insulin resistance. Obese individuals often have enlarged adipocytes with a reduced buffering capacity for lipid storage, thereby exposing other tissues to an excessive influx of lipids, leading to ectopic fat deposition and insulin resistance in situations where energy intake exceeds energy expenditure. In addition, adipose tissue blood flow is decreased in obesity. This impairment may affect lipid handling in adipose tissue and, thereby, further contribute to excessive fat storage in non-adipose tissues. On the other hand, adipose tissue hypoperfusion may induce hypoxia in this tissue. Adipose tissue hypoxia may result in disturbances in adipokine secretion and increased macrophage infiltration in adipose tissue, events that are frequently observed in obesity. In this review, it is discussed how enlarged adipocytes, an impaired blood flow through adipose tissue, adipose tissue hypoxia, adipose tissue inflammation and macrophage infiltration are interrelated and may induce insulin resistance.
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Affiliation(s)
- Gijs H Goossens
- Department of Human Biology, Nutrition and Toxicology Research Institute Maastricht (NUTRIM), Maastricht University, P.O. Box 616, 6200 MD, Maastricht, The Netherlands.
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Lowrie EG. Conceptual Model for a Core Pathobiology of Uremia with Special Reference to Anemia, Malnourishment, and Mortality among Dialysis Patients. Semin Dial 2007. [DOI: 10.1111/j.1525-139x.1997.tb00865.x] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Tarcin O, Bajaj M, Akalin S. Insulin Resistance, Adipocyte Biology, and Thiazolidinediones: A Review. Metab Syndr Relat Disord 2007; 5:103-15. [DOI: 10.1089/met.2007.0001] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Affiliation(s)
- Ozlem Tarcin
- Marmara University Faculty of Medicine, Endocrinology and Metabolism, Istanbul, Turkey
| | - Mandeep Bajaj
- Department Of Medicine, Baylor College Of Medicine, Houston, Texas, USA
| | - Sema Akalin
- Marmara University Faculty of Medicine, Endocrinology and Metabolism, Istanbul, Turkey
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Wahba IM, Mak RH. Obesity and obesity-initiated metabolic syndrome: mechanistic links to chronic kidney disease. Clin J Am Soc Nephrol 2007; 2:550-62. [PMID: 17699463 DOI: 10.2215/cjn.04071206] [Citation(s) in RCA: 370] [Impact Index Per Article: 21.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
There is an epidemic of obesity and the metabolic syndrome in the United States and across the world. Both entities are associated with high mortality, mainly as a result of cardiovascular disease. The epidemic of obesity has been paralleled by an increase in the incidence of chronic kidney disease (CKD). Several recent epidemiologic studies have shown that obesity and the metabolic syndrome are independent predictors of CKD. In addition to diabetes and hypertension, several other mechanisms have been postulated to initiate and maintain kidney injury in patients with obesity and the metabolic syndrome. This article reviews the recent epidemiologic data linking obesity and the metabolic syndrome to CKD and summarizes the potential mechanisms of renal injury in this setting, with a focus on the role of inflammation, lipotoxicity, and hemodynamic factors. Potential preventive and therapeutic modalities based on the limited evidence available are discussed.
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Affiliation(s)
- Ihab M Wahba
- Department of Medicine, Division of Nephrology and Hypertension, Oregon Health & Science University, Portland, Oregon, USA
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KUSHIBIKI S, SHINGU H, KOMATSU T, ITOH F, KASUYA E, ASO H, HODATE K. Effect of recombinant bovine tumor necrosis factor-? on hormone release in lactating cows. Anim Sci J 2006. [DOI: 10.1111/j.1740-0929.2006.00392.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Karagiannides I, Thomou T, Tchkonia T, Pirtskhalava T, Kypreos KE, Cartwright A, Dalagiorgou G, Lash TL, Farmer SR, Timchenko NA, Kirkland JL. Increased CUG triplet repeat-binding protein-1 predisposes to impaired adipogenesis with aging. J Biol Chem 2006; 281:23025-33. [PMID: 16754681 DOI: 10.1074/jbc.m513187200] [Citation(s) in RCA: 52] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
Preadipocyte differentiation capacity declines between middle and old age. Expression of the adipogenic transcription factors, CCAAT/enhancer-binding protein (C/EBP) alpha and peroxisome proliferator-activated receptor gamma (PPARgamma), is lower in differentiating preadipocytes from old than young animals, although no age-related changes occur in C/EBPbeta mRNA, which is upstream of C/EBPalpha and PPARgamma. C/EBPbeta-liver-enriched inhibitory protein (C/EBPbeta-LIP), a truncated C/EBPbeta isoform that is a dominant inhibitor of differentiation, increases with aging in rat fat tissue and preadipocytes. CUG triplet repeat-binding protein-1 (CUGBP1) binds to C/EBPbeta mRNA, increasing C/EBPbeta-LIP translation. Abundance and nucleotide binding activity of CUGBP1 increased with aging in preadipocytes. CUGBP1 overexpression in preadipocytes from young animals increased C/EBPbeta-LIP and impaired adipogenesis. Decreasing CUGBP1 in preadipocytes from old rats by RNA interference reduced C/EBPbeta-LIP abundance and promoted adipogenesis. Tumor necrosis factor-alpha, levels of which are elevated in fat tissue with aging, increased CUGBP1 protein, CUGBP1 binding activity, and C/EBPbeta-LIP in preadipocytes from young rats. Thus, CUGBP1 contributes to regulation of adipogenesis in primary preadipocytes and is responsive to tumor necrosis factor-alpha. With aging, preadipocyte CUGBP1 abundance and activity increases, resulting in enhanced translation of the C/EBPbeta-LIP isoform, thereby blocking effects of adipogenic transcription factors, predisposing preadipocytes from old animals to resist adipogenesis. Altered translational processing, possibly related to changes in cytokine milieu and activation of stress responses, may contribute to changes in progenitor differentiation and tissue function with aging.
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Zhao YF, Feng DD, Chen C. Contribution of adipocyte-derived factors to beta-cell dysfunction in diabetes. Int J Biochem Cell Biol 2006; 38:804-19. [PMID: 16378747 DOI: 10.1016/j.biocel.2005.11.008] [Citation(s) in RCA: 63] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2005] [Revised: 11/11/2005] [Accepted: 11/16/2005] [Indexed: 11/30/2022]
Abstract
In addition to serving as an energy reservoir, the adipocyte has been characterized as an endocrine cell, secreting many bioactive factors which influence energy homeostasis. Being overweight, with excessive adipose tissue, is considered to be part of the pathogenesis of type 2 diabetes. Insulin resistance and beta-cell dysfunction are two major pathophysiological changes seen in type 2 diabetes. In addition to inducing insulin resistance in insulin-responsive tissues, adipocyte-derived factors play an important role in the pathogenesis of beta-cell dysfunction. Leptin, free fatty acids, adiponectin, tumor necrosis factor-alpha and interleukin-6 are all produced and secreted by adipocytes, and may directly influence aspects of beta-cell function, including insulin synthesis and secretion, insulin cell survival and apoptosis. During the progression from normal weight to obesity and on to overt diabetes, the adipocyte-derived factors contribute to the occurrence and development of beta-cell dysfunction and type 2 diabetes.
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Affiliation(s)
- Yu-Feng Zhao
- Department of Physiology, The Fourth Military Medical University, Xi'an, China
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Bennet AM, van Maarle MC, Hallqvist J, Morgenstern R, Frostegård J, Wiman B, Prince JA, de Faire U. Association of TNF-alpha serum levels and TNFA promoter polymorphisms with risk of myocardial infarction. Atherosclerosis 2005; 187:408-14. [PMID: 16243340 DOI: 10.1016/j.atherosclerosis.2005.09.022] [Citation(s) in RCA: 56] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/14/2004] [Revised: 09/15/2005] [Accepted: 09/22/2005] [Indexed: 02/08/2023]
Abstract
Elevated levels of tumor necrosis factor-alpha (TNF-alpha), and presence of polymorphisms of the TNFA gene have been implicated in cardiovascular disease pathogenesis. We explored the relationship between polymorphisms in the TNFA gene (-1031C/T, -863C/A -857T/C, -308G/A, -238G/A), protein levels of TNF-alpha and their association to myocardial infarction (MI) using a sample of 1213 post-MI patients and 1561 healthy controls. MI risk was higher among men with elevated TNF-alpha levels, with the highest compared to the lowest TNF-alpha quartile giving a 70% risk increase (OR [95% CI]: 1.7 [1.1; 2.6]). Obese subjects who also had elevated TNF-alpha levels were at even higher risk for MI (OR [95% CI]: 3.4 [2.1; 5.6]). Higher TNF-alpha levels were seen among smokers (but not among non-smokers) carrying the -857T allele. Furthermore, a rare haplotype occurred more frequently among the cases than the controls. Elevated TNF-alpha levels are associated with increased MI risk. Obese subjects with elevated TNF-a levels, and carriers of polymorphisms in or near TNFA are particularly susceptible to the hazards of smoking, results which may have implications for cardiovascular preventive measures.
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Affiliation(s)
- A M Bennet
- Unit of Cardiovascular Epidemiology, Institute of Environmental Medicine, Karolinska Institute, Box 210, S-171 77 Stockholm, Sweden.
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Gupta A, Ten S, Anhalt H. Serum levels of soluble tumor necrosis factor-alpha receptor 2 are linked to insulin resistance and glucose intolerance in children. J Pediatr Endocrinol Metab 2005; 18:75-82. [PMID: 15679072 DOI: 10.1515/jpem.2005.18.1.75] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
BACKGROUND Obesity and insulin resistance are increasingly common problems in children. Tumor necrosis factor-alpha (TNF-alpha) has important effects on lipid and glucose metabolism. This effect may be mediated through soluble TNF-alpha receptor 2 (sTNFR2). OBJECTIVE To investigate the relationship between insulin resistance and the TNF-alpha system in childhood obesity. CHILDREN AND METHODS Twenty-one obese and six non-obese children were studied. Body mass index (BMI) z-scores, percent body fat (PBF) and waist to hip ratio (WHR) were determined. Fasting serum levels of total cholesterol, HDL-cholesterol, LDL-cholesterol, TNF-alpha and sTNFR2 were measured. A standard 2-hour oral glucose tolerance test (dose of glucose: 1.75 g/kg, max. 75 g) was done. Insulin resistance (IR) was estimated by fasting plasma insulin, plasma insulin at 120 min, homeostasis model assessment (HOMA) and insulin area under the curve (AUC) from OGTT. Insulin sensitivity was estimated by oral glucose insulin sensitivity (OGIS120). RESULTS Among the obese participants, one child (5.2%) was found to have diabetes mellitus and four others (21.1%) impaired glucose tolerance (IGT). Obese children had significantly elevated sTNFR2 levels. Furthermore, the group of obese children with IGT and the patient with newly diagnosed diabetes mellitus together (n = 5) had significantly higher levels of serum sTNFR2 (2,865+/-320 pg/ml) than the rest of the obese (2,460+/-352 pg/ml; p = 0.016) or lean (1,969+/-362 pg/ml; p = 0.014) children. Serum sTNFR2 levels correlated positively with insulin AUC, HOMA IR, fasting plasma insulin, plasma insulin at 120 min, total cholesterol and LDL/ HDL ratio, and negatively with OGIS120. Multiple regression analysis revealed that age, WHR, sTNFR2 and LDL predicted 81% of the variability in glucose at 120 min. CONCLUSION sTNFR2 is a candidate marker of insulin resistance and glucose intolerance.
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Affiliation(s)
- Ashutosh Gupta
- Division of Pediatric Endocrinology, Maimonides Medical Center, Brooklyn, NY 11219, USA
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