1
|
Geng S, Chen D, Wang Y, Yu X, Zuo D, Lv X, Zhou X, Hu C, Yang X, Ma X, Hu W, Xi J, Yu S. Serum levels of Vanin-2 increase with obesity in relation to inflammation of adipose tissue and may be a predictor of bariatric surgery outcomes. Front Nutr 2023; 10:1270435. [PMID: 38156278 PMCID: PMC10753581 DOI: 10.3389/fnut.2023.1270435] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2023] [Accepted: 11/06/2023] [Indexed: 12/30/2023] Open
Abstract
Objective Excessive obesity can lead to dysfunction in adipose tissue, which contributes to the development of comorbidities associated with obesity, such as type 2 diabetes (T2D), cardiovascular and cerebrovascular disease, among others. Previous research has mainly focused on the Vanin family in systemic inflammatory diseases or predicting its role in tumor prognosis, while neglecting its role as a secretory protein in adipose tissue inflammation and metabolism. The objective of this study was to compare the changes in Vanin-2 levels in the circulating blood of normal and obese individuals, and to assess its correlation with inflammatory factors in vivo. Furthermore, the study aimed to systematically evaluate its effectiveness in human weight loss surgery. Methods Serum concentrations of Vanin-2 and inflammatory indicators were measured in 518 volunteers. Furthermore, the concentrations of Vanin-2 were measured both before and after weight loss through a dietetic program or laparoscopic sleeve gastrectomy (LSG). Additionally, we assessed the levels of insulin, adiponectin, and inflammation-related factors. The hormonal profile and changes in body weight were evaluated at baseline and 3 months after surgery. Results Serum levels of Vanin-2 were found to be significantly increased in individuals with overweight/obesity (OW/OB) group (controls 438.98 ± 72.44, OW/OB 530.89 ± 79.39 ug/L; p < 0.001). These increased levels were associated with IL-18, BMI, FAT%, and HOMA-IR. However, levels of Vanin-2 remained unchanged after conventional dietary treatment. On the other hand, weight loss induced by LSG resulted in a significant decrease in Vanin-2 concentrations from 586.44 ± 48.84 to 477.67 ± 30.27 ug/L (p < 0.001), and this decrease was associated with the Vanin-2 concentrations observed before the operation. Conclusion Serum Vanin-2 is a highly effective biomarker for assessing adipose tissue inflammation in obesity and has the potential to serve as a predictor of bariatric surgery outcomes.
Collapse
Affiliation(s)
- Shan Geng
- The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
- State Key Laboratory of Ultrasound in Medicine and Engineering, College of Biomedical Engineering, Chongqing Medical University, Chongqing, China
| | - Dongmei Chen
- Department of Otorhinolaryngology, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Yanping Wang
- The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Xingrui Yu
- Institute of Information, Xiamen University, Xiamen, China
| | - Dan Zuo
- Department of Clinical Nutrition, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Xinlu Lv
- Department of Endocrinology, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Xuelian Zhou
- The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Chengju Hu
- The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Xuesong Yang
- Department of General Surgery, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Xujue Ma
- Department of Critical Care Medicine, The First Affiliated Hospital of Chongqing Medical and Pharmaceutical College, Chongqing, China
| | - Wenjing Hu
- Department of Clinical Nutrition, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Jiazhuang Xi
- The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| | - Shaohong Yu
- Department of General Surgery, The Affiliated Dazu Hospital of Chongqing Medical University, Chongqing, China
| |
Collapse
|
2
|
Somm E, Jornayvaz FR. Interleukin-18 in metabolism: From mice physiology to human diseases. Front Endocrinol (Lausanne) 2022; 13:971745. [PMID: 36313762 PMCID: PMC9596921 DOI: 10.3389/fendo.2022.971745] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/17/2022] [Accepted: 09/23/2022] [Indexed: 11/13/2022] Open
Abstract
Interleukin-18 (IL-18) is a classical member of the IL-1 superfamily of cytokines. As IL-1β, IL-18 precursor is processed by inflammasome/caspase-1 into a mature and biologically active form. IL-18 binds to its specific receptor composed of two chains (IL-18Rα and IL-18Rβ) to trigger a similar intracellular signaling pathway as IL-1, ultimately leading to activation of NF-κB and inflammatory processes. Independently of this IL-1-like signaling, IL-18 also specifically induces IFN-γ production, driving the Th1 immune response. In circulation, IL-18 binds to the IL-18 binding protein (IL-18BP) with high affinity, letting only a small fraction of free IL-18 able to trigger receptor-mediated signaling. In contrast to other IL-1 family members, IL-18 is produced constitutively by different cell types, suggesting implications in normal physiology. If the roles of IL-18 in inflammatory processes and infectious diseases are well described, recent experimental studies in mice have highlighted the action of IL-18 signaling in the control of energy homeostasis, pancreatic islet immunity and liver integrity during nutritional stress. At the same time, clinical observations implicate IL-18 in various metabolic diseases including obesity, type 1 and 2 diabetes and nonalcoholic fatty liver disease (NAFLD)/nonalcoholic steatohepatitis (NASH). In the present review, we summarize and discuss both the physiological actions of IL-18 in metabolism and its potential roles in pathophysiological mechanisms leading to the most common human metabolic disorders, such as obesity, diabetes and NAFLD/NASH.
Collapse
Affiliation(s)
- Emmanuel Somm
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
| | - François R. Jornayvaz
- Service of Endocrinology, Diabetes, Nutrition and Therapeutic Patient Education, Department of Internal Medicine, Geneva University Hospitals, Geneva, Switzerland
- Department of Cell Physiology and Metabolism, University of Geneva, Geneva, Switzerland
- Diabetes Center, Faculty of Medicine, University of Geneva, Geneva, Switzerland
- *Correspondence: Emmanuel Somm, ; François R. Jornayvaz,
| |
Collapse
|
3
|
Role of Inflammatory Cytokines, Growth Factors and Adipokines in Adipogenesis and Insulin Resistance. Inflammation 2021; 45:31-44. [PMID: 34536157 PMCID: PMC8449520 DOI: 10.1007/s10753-021-01559-z] [Citation(s) in RCA: 52] [Impact Index Per Article: 17.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 08/24/2021] [Accepted: 08/31/2021] [Indexed: 01/06/2023]
Abstract
Obesity, manifested by increased adiposity, represents a main cause of morbidity in the developed countries, causing increased risk of insulin resistance and type 2 diabetes mellitus. Recruitment of macrophages and activation of innate immunity represent the initial insult, which can be further exacerbated through secretion of chemokines and adipocytokines from activated macrophages and other cells within the adipose tissue. These events can impact adipogenesis, causing dysfunction of the adipose tissue and increased risk of insulin resistance. Various factors mediate adiposity and related insulin resistance including inflammatory and non-inflammatory factors such as pro and anti-inflammatory cytokines, adipokines and growth factors. In this review we will discuss the role of these factors in adipogenesis and development of insulin resistance and type 2 diabetes mellitus in the context of obesity. Understanding the molecular mechanisms that mediate adipogenesis and insulin resistance could help the development of novel therapeutic strategies for individuals at higher risk of insulin resistance and type 2 diabetes mellitus.
Collapse
|
4
|
Jiang N, Li Y, Shu T, Wang J. Cytokines and inflammation in adipogenesis: an updated review. Front Med 2019; 13:314-329. [PMID: 30066061 DOI: 10.1007/s11684-018-0625-0] [Citation(s) in RCA: 58] [Impact Index Per Article: 11.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/16/2017] [Accepted: 12/12/2017] [Indexed: 02/07/2023]
Abstract
The biological relevance of cytokines is known for more than 20 years. Evidence suggests that adipogenesis is one of the biological events involved in the regulation of cytokines, and pro-inflammatory cytokines (e.g., TNFα and IL-1β) inhibit adipogenesis through various pathways. This inhibitory effect can constrain the hyperplastic expandability of adipose tissues. Meanwhile, chronic low-grade inflammation is commonly observed in obese populations. In some individuals, the impaired ability of adipose tissues to recruit new adipocytes to adipose depots during overnutrition results in adipocyte hypertrophy, ectopic lipid accumulation, and insulin resistance. Intervention studies showed that pro-inflammatory cytokine antagonists improve metabolism in patients with metabolic syndrome. This review focuses on the cytokines currently known to regulate adipogenesis under physiological and pathophysiological circumstances. Recent studies on how inhibited adipogenesis leads to metabolic disorders were summarized. Although the interplay of cytokines and lipid metabolism is yet incompletely understood, cytokines represent a class of potential therapeutic targets in the treatment of metabolic disorders.
Collapse
Affiliation(s)
- Ning Jiang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, 100730, China
| | - Yao Li
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, 100730, China
| | - Ting Shu
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, 100730, China
| | - Jing Wang
- State Key Laboratory of Medical Molecular Biology, Institute of Basic Medical Sciences, Chinese Academy of Medical Sciences, Department of Pathophysiology, Peking Union Medical College, Beijing, 100730, China.
| |
Collapse
|
5
|
Samarani S, Allam O, Sagala P, Aldabah Z, Jenabian MA, Mehraj V, Tremblay C, Routy JP, Amre D, Ahmad A. Imbalanced production of IL-18 and its antagonist in human diseases, and its implications for HIV-1 infection. Cytokine 2016; 82:38-51. [PMID: 26898120 DOI: 10.1016/j.cyto.2016.01.006] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2015] [Revised: 01/12/2016] [Accepted: 01/15/2016] [Indexed: 12/16/2022]
Abstract
IL-18 is a pleiotropic and multifunctional cytokine that belongs to the IL-1 family. It is produced as a biologically inactive precursor, which is cleaved into its active mature form mainly by caspase-1. The caspase becomes active from its inactive precursor (procaspase-1) upon assembly of an inflammasome. Because of IL-18's potential pro-inflammatory and tissue destructive effects, its biological activities are tightly controlled in the body by its naturally occurring antagonist called IL-18BP. The antagonist is produced in the body both constitutively and in response to an increased production of IL-18 as a negative feedback mechanism. Under physiological conditions, most of IL-18 in the circulation is bound with IL-18BP and is inactive. However, an imbalance in the production of IL-18 and its antagonist (an increase in the production of IL-18 with a decrease, no increase or an insufficient increase in the production of IL-18BP) has been described in many chronic inflammatory diseases in humans. The imbalance results in an increase in the concentrations of free IL-18 (unbound with its antagonist) resulting in increased biological activities of the cytokine that contribute towards pathogenesis of the disease. In this article, we provide an overview of the current biology of IL-18 and its antagonist, discuss how the imbalance occurs in HIV infections and how it contributes towards development of AIDS and other non-AIDS-associated clinical conditions occurring in HIV-infected individuals undergoing combination anti-retroviral therapy (cART). Finally, we discuss challenges facing immunotherapeutic strategies aimed at restoring balance between IL-18 and its antagonist in these patients.
Collapse
Affiliation(s)
- Suzanne Samarani
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Ossama Allam
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Patrick Sagala
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | - Zainab Aldabah
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada
| | | | - Vikram Mehraj
- McGill University Health Center, McGill University, Montreal, Canada
| | - Cécile Tremblay
- Department of Microbiology, Infectiology & Immunology, Canada; Division of Infectious Diseases, CHUM, Canada; University of Montreal, Montreal, Canada
| | - Jean-Pierre Routy
- McGill University Health Center, McGill University, Montreal, Canada
| | - Devendra Amre
- CHU-Sainte-Justine Research Center, Canada; Department of Pediatrics, Canada; University of Montreal, Montreal, Canada
| | - Ali Ahmad
- Laboratory of Innate Immunity, Canada; CHU-Sainte-Justine Research Center, Canada; Department of Microbiology, Infectiology & Immunology, Canada; University of Montreal, Montreal, Canada.
| |
Collapse
|
6
|
Ballak DB, Stienstra R, Tack CJ, Dinarello CA, van Diepen JA. IL-1 family members in the pathogenesis and treatment of metabolic disease: Focus on adipose tissue inflammation and insulin resistance. Cytokine 2015; 75:280-90. [PMID: 26194067 PMCID: PMC4553099 DOI: 10.1016/j.cyto.2015.05.005] [Citation(s) in RCA: 175] [Impact Index Per Article: 19.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2015] [Revised: 05/07/2015] [Accepted: 05/07/2015] [Indexed: 02/06/2023]
Abstract
Obesity is characterized by a chronic, low-grade inflammation that contributes to the development of insulin resistance and type 2 diabetes. Cytokines and chemokines produced by immunocompetent cells influence local as well as systemic inflammation and are therefore critical contributors to the pathogenesis of type 2 diabetes. Hence, cytokines that modulate inflammatory responses are emerging as potential targets for intervention and treatment of the metabolic consequences of obesity. The interleukin-1 (IL-1) family of cytokines and receptors are key mediators of innate inflammatory responses and exhibit both pro- and anti-inflammatory functions. During the last decades, mechanistic insights into how the IL-1 family affects the initiation and progression of obesity-induced insulin resistance have increased significantly. Here, we review the current knowledge and understanding, with emphasis on the therapeutic potential of individual members of the IL-1 family of cytokines for improving insulin sensitivity in patients with diabetes.
Collapse
Affiliation(s)
- Dov B Ballak
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Integrative Physiology, University of Colorado Boulder, Boulder, CO, USA; Department of Medicine, University of Colorado Denver, Aurora, CO, USA.
| | - Rinke Stienstra
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Human Nutrition, Wageningen University, Wageningen, The Netherlands
| | - Cees J Tack
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| | - Charles A Dinarello
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands; Department of Medicine, University of Colorado Denver, Aurora, CO, USA
| | - Janna A van Diepen
- Department of Medicine, Radboud University Medical Center, Nijmegen, The Netherlands
| |
Collapse
|
7
|
Yamashita H, Aoyama-Ishikawa M, Takahara M, Yamauchi C, Inoue T, Miyoshi M, Maeshige N, Usami M, Nakao A, Kotani J. Endogenous interleukin 18 suppresses hyperglycemia and hyperinsulinemia during the acute phase of endotoxemia in mice. Surg Infect (Larchmt) 2015; 16:90-6. [PMID: 25651466 DOI: 10.1089/sur.2013.269] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
BACKGROUND Hyperglycemia associated with insulin resistance is common among critically ill patients. Interleukin (IL)-18 has been linked with hyperglycemia and insulin resistance in chronic disease, but the relation between IL-18 and insulin resistance during critical illness was unexplored. This study investigated whether IL-18 modulates hyperglycemia and insulin resistance during acute inflammation. METHODS We injected lipopolysaccharide (LPS) 40 mg/kg into wild-type (WT) and IL-18 knockout (KO) mice to induce endotoxemia and examined insulin resistance and insulin-dependent signaling pathways during the acute phase. RESULTS During the first hour after LPS treatment, IL-18 KO mice showed higher blood glucose and insulin and less insulin receptor substrate-1 and less phosphorylated Akt in the liver compared with WT mice. Interleukin-18 KO mice exhibited better survival after LPS treatment. CONCLUSIONS The findings suggest that endogenous IL-18 may attenuate hyperglycemia and modulate insulin signaling in liver. Accordingly, IL-18 may modulate glucose tolerance during acute inflammation.
Collapse
Affiliation(s)
- Hayato Yamashita
- 1 Department of Biophysics, Kobe University Graduate School of Health Sciences , Hyogo, Japan
| | | | | | | | | | | | | | | | | | | |
Collapse
|
8
|
Gao D, Madi M, Ding C, Fok M, Steele T, Ford C, Hunter L, Bing C. Interleukin-1β mediates macrophage-induced impairment of insulin signaling in human primary adipocytes. Am J Physiol Endocrinol Metab 2014; 307:E289-304. [PMID: 24918199 PMCID: PMC4121578 DOI: 10.1152/ajpendo.00430.2013] [Citation(s) in RCA: 134] [Impact Index Per Article: 13.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/02/2013] [Accepted: 05/20/2014] [Indexed: 01/21/2023]
Abstract
Adipose tissue expansion during obesity is associated with increased macrophage infiltration. Macrophage-derived factors significantly alter adipocyte function, inducing inflammatory responses and decreasing insulin sensitivity. Identification of the major factors that mediate detrimental effects of macrophages on adipocytes may offer potential therapeutic targets. IL-1β, a proinflammatory cytokine, is suggested to be involved in the development of insulin resistance. This study investigated the role of IL-1β in macrophage-adipocyte cross-talk, which affects insulin signaling in human adipocytes. Using macrophage-conditioned (MC) medium and human primary adipocytes, we examined the effect of IL-1β antagonism on the insulin signaling pathway. Gene expression profile and protein abundance of insulin signaling molecules were determined, as was the production of proinflammatory cytokine/chemokines. We also examined whether IL-1β mediates MC medium-induced alteration in adipocyte lipid storage. MC medium and IL-1β significantly reduced gene expression and protein abundance of insulin signaling molecules, including insulin receptor substrate-1, phosphoinositide 3-kinase p85α, and glucose transporter 4 and phosphorylation of Akt. In contrast, the expression and release of the proinflammatory markers, including IL-6, IL-8, monocyte chemotactic protein-1, and chemokine (C-C motif) ligand 5 by adipocytes were markedly increased. These changes were significantly reduced by blocking IL-1β activity, its receptor binding, or its production by macrophages. MC medium-inhibited expression of the adipogenic factors and -stimulated lipolysis was also blunted with IL-1β neutralization. We conclude that IL-1β mediates, at least in part, the effect of macrophages on insulin signaling and proinflammatory response in human adipocytes. Blocking IL-1β could be beneficial for preventing obesity-associated insulin resistance and inflammation in human adipose tissue.
Collapse
MESH Headings
- Adipocytes, White/cytology
- Adipocytes, White/drug effects
- Adipocytes, White/immunology
- Adipocytes, White/metabolism
- Antibodies, Neutralizing/pharmacology
- Caspase 1/chemistry
- Caspase 1/metabolism
- Caspase Inhibitors/pharmacology
- Cell Communication
- Cell Line
- Cells, Cultured
- Culture Media, Conditioned/chemistry
- Culture Media, Conditioned/metabolism
- Gene Expression Regulation/drug effects
- Humans
- Hypoglycemic Agents/pharmacology
- Insulin/pharmacology
- Insulin Resistance
- Interleukin 1 Receptor Antagonist Protein/genetics
- Interleukin 1 Receptor Antagonist Protein/metabolism
- Interleukin-1beta/antagonists & inhibitors
- Interleukin-1beta/metabolism
- Lipolysis/drug effects
- Macrophages/cytology
- Macrophages/drug effects
- Macrophages/immunology
- Macrophages/metabolism
- Receptors, Interleukin-1/agonists
- Receptors, Interleukin-1/antagonists & inhibitors
- Receptors, Interleukin-1/metabolism
- Recombinant Proteins/metabolism
- Signal Transduction
Collapse
Affiliation(s)
- Dan Gao
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Mohamed Madi
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Cherlyn Ding
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Matthew Fok
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Thomas Steele
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Christopher Ford
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Leif Hunter
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| | - Chen Bing
- Department of Obesity and Endocrinology, Institute of Ageing and Chronic Disease, University of Liverpool, Liverpool, United Kingdom
| |
Collapse
|
9
|
The effect of chronic candesartan therapy on the metabolic profile and renal tissue cytokine levels in the obese Zucker rat. Mediators Inflamm 2010; 2010:841343. [PMID: 20490358 PMCID: PMC2872766 DOI: 10.1155/2010/841343] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2009] [Revised: 01/27/2010] [Accepted: 03/05/2010] [Indexed: 01/13/2023] Open
Abstract
The effect of candesartan, an angiotensin-II type-1 receptor antagonist, on the metabolic profile and renal inflammation is unclear. We evaluated this relationship by feeding male lean (LZ) and obese (OZ) Zucker rats chow or chow with candesartan (23.5 mg/kg · diet) for 14 weeks (n = 6–8/treatment/body type). Candesartan reduced serum triglycerides, plasma creatinine, urine albumin, and renal cortical collagen and glycogen deposition in the OZ. An ELISA-based cytokine array revealed that candesartan normalized elevated renal interleukin (IL) 1-β and monocyte chemoattractant protein-1 (MCP-1) levels in OZ. Nonetheless, candesartan impaired glucose tolerance, and did not lower blood insulin or glucose levels. Moreover, renal IL-1α, -2, -4, -6 and -10 tumor necrosis factor-α, interferon-γ, were
significantly reduced in OZ relative to LZ, and increased by candesartan. Furthermore, candesartan increased growth-regulated oncogene, transforming growth factor-β1 and IL-18
in OZ kidneys to a level higher than LZ or untreated OZ. Candesartan did not affect renal cytokine levels in LZ. Overall, candesartan attenuated renal disease and improved renal function in OZ, despite mixed effects on metabolic factors and cytokines. Reduced plasma
triglycerides and/or renal MCP-1 and IL-1β may have had a role in this protection. However,
these effects were clearly independent of any improvement in glucose tolerance.
Collapse
|