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Wang K, Chen Z, Wei Z, He L, Gong L. Association between body fat distribution and asthma in adults: results from the cross-sectional and bidirectional Mendelian randomization study. Front Nutr 2024; 11:1432973. [PMID: 39104756 PMCID: PMC11299241 DOI: 10.3389/fnut.2024.1432973] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2024] [Accepted: 07/12/2024] [Indexed: 08/07/2024] Open
Abstract
Background Many studies define obesity based on body mass index (BMI) and explore its relationship with adult asthma. However, BMI only considers height and weight, ignoring other factors such as body fat, which may have a greater impact on health. We investigated the relationship between body fat distribution and adult asthma using both a cross-sectional study and bidirectional Mendelian randomization (MR) analysis. Methods Weighted logistic regression models were used to examine the relationship between body fat distribution measurements and adult asthma in the cross-sectional study from National Health and Nutrition Examination Survey (NHANES) 2011-2018. Restricted cubic spline (RCS) curves were employed to explore the dose-response relationship between them. The inverse-variance weighted (IVW) method was used as the main method of MR analysis to explore the causal effect of exposure on outcome. Results After adjusting for all covariates, weighted logistic regression analysis indicated that fat mass in the left arm, left leg, right arm, right leg, trunk, and total body is associated with an increased risk of developing adult asthma (p < 0.05). RCS curves showed that all six fat mass indicators exhibit a J-shaped relationship with adult asthma. Forward MR analysis found a causal effect of six fat mass indicators on the increased risk of adult asthma (p < 0.05). However, reverse MR did not reveal any causal effect of adult asthma on these six fat mass indicators (p > 0.05). Conclusion Our study supports a positive correlation and a unidirectional causality between body fat distribution measurements and the risk of adult asthma. Further studies are needed to validate our findings.
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Affiliation(s)
- Kang Wang
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Army Medical University, Chongqing, China
| | - Zhujun Chen
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Army Medical University, Chongqing, China
| | - Zhengxiao Wei
- Department of Clinical Laboratory, Public Health Clinical Center of Chengdu, Chengdu, China
| | - Lijun He
- Department of Ultrasound, The Second Affiliated Hospital of Army Medical University, Chongqing, China
| | - Liang Gong
- Department of Respiratory and Critical Care Medicine, The First Affiliated Hospital of Army Medical University, Chongqing, China
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2
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Ho PY, Chou YC, Koh YC, Lin WS, Chen WJ, Tseng AL, Gung CL, Wei YS, Pan MH. Lactobacillus rhamnosus 069 and Lactobacillus brevis 031: Unraveling Strain-Specific Pathways for Modulating Lipid Metabolism and Attenuating High-Fat-Diet-Induced Obesity in Mice. ACS OMEGA 2024; 9:28520-28533. [PMID: 38973907 PMCID: PMC11223209 DOI: 10.1021/acsomega.4c02514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/14/2024] [Revised: 04/29/2024] [Accepted: 05/09/2024] [Indexed: 07/09/2024]
Abstract
Obesity is a global health crisis, marked by excessive fat in tissues that function as immune organs, linked to microbiota dysregulation and adipose inflammation. Investigating the effects of Lactobacillus rhamnosus SG069 (LR069) and Lactobacillus brevis SG031 (LB031) on obesity and lipid metabolism, this research highlights adipose tissue's critical immune-metabolic role and the probiotics' potential against diet-induced obesity. Mice fed a high-fat diet were treated with either LR069 or LB031 for 12 weeks. Administration of LB031 boosted lipid metabolism, indicated by higher AMP-activated protein kinase (AMPK) and acetyl-CoA carboxylase (ACC) phosphorylation, and increased the M2/M1 macrophage ratio, indicating LB031's anti-inflammatory effect. Meanwhile, LR069 administration not only led to significant weight loss by enhancing lipolysis which evidenced by increased phosphorylation of hormone-sensitive lipase (HSL) and adipose triglyceride lipase (ATGL) but also elevated Akkermansia and fecal acetic acid levels, showing the gut microbiota's pivotal role in its antiobesity effects. LR069 and LB031 exhibit distinct effects on lipid metabolism and obesity, underscoring their potential for precise interventions. This research elucidates the unique impacts of these strains on metabolic health and highlights the intricate relationship between gut microbiota and obesity, advancing our knowledge of probiotics' therapeutic potential.
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Affiliation(s)
- Pin-Yu Ho
- Institute
of Food Science and Technology, National
Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC
| | - Ya-Chun Chou
- Institute
of Food Science and Technology, National
Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC
| | - Yen-Chun Koh
- Institute
of Food Science and Technology, National
Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC
| | - Wei-Sheng Lin
- Institute
of Food Science and Technology, National
Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC
- Department
of Food Science, National Quemoy University, Quemoy County 89250, Taiwan, ROC
| | - Wei-Jen Chen
- Syngen
Biotech Co., Ltd., Building
A, No. 154, Kaiyuan Rd., Sinying, Tainan 73055, Taiwan
| | - Ai-Lun Tseng
- Syngen
Biotech Co., Ltd., Building
A, No. 154, Kaiyuan Rd., Sinying, Tainan 73055, Taiwan
| | - Chiau-Ling Gung
- Syngen
Biotech Co., Ltd., Building
A, No. 154, Kaiyuan Rd., Sinying, Tainan 73055, Taiwan
| | - Yu-Shan Wei
- Syngen
Biotech Co., Ltd., Building
A, No. 154, Kaiyuan Rd., Sinying, Tainan 73055, Taiwan
| | - Min-Hsiung Pan
- Institute
of Food Science and Technology, National
Taiwan University, No. 1, Sec. 4, Roosevelt Road, Taipei 10617, Taiwan, ROC
- Department
of Public Health, China Medical University, 91, Hsueh-Shih Road, Taichung 40402, Taiwan, ROC
- Department
of Food Nutrition and Health Biotechnology, Asia University, 500,
Lioufeng Rd., Wufeng, Taichung 41354, Taiwan, ROC
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3
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Gong X, Tang Y, Yu SS, Shi W, Wang YR, Deng JL, Rui JB, Qiu YY. Elevated serum leptin may be associated with disease activity and secondary osteoporosis in Chinese patients with rheumatoid arthritis. Clin Rheumatol 2023; 42:3333-3340. [PMID: 37646860 DOI: 10.1007/s10067-023-06725-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/24/2022] [Revised: 06/13/2023] [Accepted: 07/25/2023] [Indexed: 09/01/2023]
Abstract
INTRODUCTION Rheumatoid arthritis (RA) is a systemic chronic autoimmune disease in adults that is associated with significant joint issues and systemic inflammation. One of the signs of bone damage in RA is osteoporosis (OP). Leptin is an inflammatory protein that has been reported to be related to RA. The potential relationships among leptin, disease activity, and OP in Chinese patients with RA are not well known. METHODS In total, 245 patients with RA and 120 healthy controls were included in this study. Detailed data on the clinical characteristics and laboratory features were collected. Information about physical activity and functional status was recorded using specific questionnaires. Bone mineral density (BMD) was measured by dual-energy X-ray absorptiometry (DXA). The MECALL castor-50-hf model X-ray scanner was used for the two-hand (including wrist) photographs. RESULTS Serum leptin levels differed significantly between the RA group and healthy control subjects (1.27/3.29 vs. 0.17/0.24, Z=13.29, P<0.001). The positive rate of leptin protein in RA patients was 86.35%, which was higher than that in controls (19.55%) (χ2=28.51, P<0.001). Pearson's correlation test showed that morning stiffness, disease duration, joint swelling, joint tenderness, swollen joint count (SJC), tender joint count (TJC), health assessment questionnaire (HAQ) score, and Sharp-van der Heijde method (Sharp) score were positively correlated with the level of serum leptin (r=0.212, r=0.312, r=0.322, r=0.501, r=0.291, r=0.334, P<0.05). There was a clear increasing trend in the level of serum leptin according to the different disease activity scores and in the 28 joint activity (DAS28) groups (F=13.936, P<0.001). Elevated leptin was a risk factor for increased disease activity and OP according to logistic regression analysis. The median leptin level differed significantly between the normal bone mass group, osteopenia group, and OP group (P<0.001). An increased serum leptin level was a risk factor for RA-induced osteoporosis according to logistic regression analysis (P<0.001). CONCLUSION These results suggest that the level of serum leptin is associated with disease activity and secondary OP among Chinese patients with RA. Key Points • Serum leptin levels in RA patients are higher than those in normal control group. • Leptin was associated with disease activity. • Leptin was associated with the occurrence of systemic osteoporosis and affects bone erosion in RA patients.
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Affiliation(s)
- Xun Gong
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Yu Tang
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China.
| | | | - Wei Shi
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Yan-Run Wang
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jia-Liang Deng
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Jin-Bin Rui
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
| | - Ying-Ying Qiu
- Department of Rheumatology & Immunology, The Affiliated Hospital of Jiangsu University, Zhenjiang, China
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Wu D, Wang L, Fan Z, Li J, Tang S, Zhao C, Zhang H, Zheng X. Comprehensive assessment of detoxification mechanisms of hydrolysis fish peptides in largemouth bass (Micropterus salmoides) under copper exposure: Tracing from bioaccumulation, oxidative stress, lipid deposition to metabolomics. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2023; 264:115418. [PMID: 37651792 DOI: 10.1016/j.ecoenv.2023.115418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2023] [Revised: 08/23/2023] [Accepted: 08/26/2023] [Indexed: 09/02/2023]
Abstract
As a heavy metal, copper is toxic to aquatic organisms in water, causing oxidative stress and lipid deposition. However, there is currently no effective dietary strategy to prevent damage caused by copper exposure. Here, copper bioaccumulation, antioxidant enzymes, lipogenic enzymes, lipid metabolism-related gene expression levels and metabolic pathways were synthesized and evaluated in copper-exposed largemouth bass (Micropterus salmoides) after hydrolysis fish peptides (HFP) pretreatment. The results showed that supplementation with 1% (P < 0.05), 3% (P < 0.01) and 5% (P < 0.05) HFP significantly reduced the copper bioaccumulation in largemouth bass. Hydrolysis fish peptides supplementation significantly reduced the activities of total antioxidant capacity (P < 0.01) and catalase (P < 0.01) and the contents of glutathione (P < 0.01) and malondialdehyde (P < 0.05). Fatty acid synthetase concentration was significantly reduced in fish supplemented with 3% (P < 0.05) and 5% HFP (P < 0.05). Similarly, fish fed 3% (P < 0.05) and 5% (P < 0.01) HFP significantly reduced the glucose-6-phosphate dehydrogenase concentration. Serum metabolomics revealed that 85, 144 and 207 differential metabolites were obtained in fish supplemented with 1%, 3% and 5% HFP, respectively. The differential metabolites were mainly lipids and lipid-like molecules, which were associated with the lipid metabolism pathways. The expression levels of fatty acid synthase (P < 0.01), sterol regulatory element binding protein-1c (P < 0.05), liver X receptor (P < 0.001), peroxisome proliferator activated γ (P < 0.01), apolipoprotein B (P < 0.001) and fatty acid-binding protein 1 (P < 0.01) were significantly down-regulated and the expression levels of carnitine palmitoyltransferase 1α (P < 0.01), hormone-sensitive lipase (P < 0.001), apolipoprotein A 1 (P < 0.05) were significantly up-regulated in fish fed with 3% HFP. Additionally, supplementation with 3% (P < 0.01) and 5% (P < 0.001) HFP significantly up-regulated the expression level of B-cell lymphoma-2 with a dose-dependent effect. In conclusion, our study confirmed that HFP supplementation was closely associated with oxidative stress, enzymatic activities and related pathways of lipid metabolism, and apoptosis, and in general alleviated lipid deposition caused by copper exposure in largemouth bass.
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Affiliation(s)
- Di Wu
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Harbin 150070, China
| | - Liansheng Wang
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Harbin 150070, China.
| | - Ze Fan
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Harbin 150070, China
| | - Jinnan Li
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Key Laboratory of Aquatic Animal Diseases and Immune Technology of Heilongjiang Province, Harbin 150070, China
| | - Shizhan Tang
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Ministry of Agriculture and Rural Affairs Fishery Environment and Aquatic Product Quality Supervision, Inspection and Testing Center, Harbin 150070, China
| | - Chen Zhao
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; Heilongjiang River Basin Fishery Ecological Environment Monitoring Center, Ministry of Agriculture and Rural Affairs, Harbin 150010, China
| | - Haitao Zhang
- Key Laboratory of Aquatic, Livestock and Poultry Feed Science and Technology in South China, Ministry of Agriculture and Rural Affairs, Guangdong Evergreen Feed Industry Co., Ltd., Zhanjiang 524000, China
| | - Xianhu Zheng
- Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China; National and Local Joint Engineering Laboratory for Freshwater Fish Breeding, Harbin 150070, China
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5
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Neo SH, Her Z, Othman R, Tee CA, Ong LC, Wang Y, Tan I, Tan J, Yang Y, Yang Z, Chen Q, Boyer LA. Expansion of human bone marrow-derived mesenchymal stromal cells with enhanced immunomodulatory properties. Stem Cell Res Ther 2023; 14:259. [PMID: 37726837 PMCID: PMC10510228 DOI: 10.1186/s13287-023-03481-7] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2023] [Accepted: 08/29/2023] [Indexed: 09/21/2023] Open
Abstract
BACKGROUND Mesenchymal stromal cells (MSCs) have broad potential as a cell therapy including for the treatment of drug-resistant inflammatory conditions with abnormal T cell proliferation such as graft-versus-host disease (GVHD). Clinical success, however, has been complicated by the heterogeneity of culture-expanded MSCs as well as donor variability. Here, we devise culture conditions that promote expansion of MSCs with enhanced immunomodulatory functions both in vitro and in animal models of GVHD. METHODS Human bone marrow-derived MSCs were expanded at high-confluency (MSCHC) and low-confluency state (MSCLC). Their immunomodulatory properties were evaluated with in vitro co-culture assays based on suppression of activated T cell proliferation and secretion of pro-inflammatory cytokines from activated T cells. Metabolic state of these cells was determined, while RNA sequencing was performed to explore transcriptome of these MSCs. Ex vivo expanded MSCHC or MSCLC was injected into human peripheral blood mononuclear cells (PBMC)-induced GVHD mouse model to determine their in vivo therapeutic efficacy based on clinical grade scoring, human CD45+ blood count and histopathological examination. RESULTS As compared to MSCLC, MSCHC significantly reduced both the proliferation of anti-CD3/CD28-activated T cells and secretion of pro-inflammatory cytokines upon MSCHC co-culture across several donors even in the absence of cytokine priming. Mechanistically, metabolic analysis of MSCHC prior to co-culture with activated T cells showed increased glycolytic metabolism and lactate secretion compared to MSCLC, consistent with their ability to inhibit T cell proliferation. Transcriptome analysis further revealed differential expression of immunomodulatory genes including TRIM29, BPIFB4, MMP3 and SPP1 in MSCHC as well as enriched pathways including cytokine-cytokine receptor interactions, cell adhesion and PI3K-AKT signalling. Lastly, we demonstrate in a human PBMC-induced GVHD mouse model that delivery of MSCHC showed greater suppression of inflammation and improved outcomes compared to MSCLC and saline controls. CONCLUSION Our study provides evidence that ex vivo expansion of MSCs at high confluency alters the metabolic and transcriptomic states of these cells. Importantly, this approach maximizes the production of MSCs with enhanced immunomodulatory functions without priming, thus providing a non-invasive and generalizable strategy for improving the use of MSCs for the treatment of inflammatory diseases.
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Affiliation(s)
- Shu Hui Neo
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
| | - Zhisheng Her
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore
- Invivocue Pte Ltd, 51 Science Park Road, #01-11/13 The Aries, Singapore Science Park II, Singapore, 117586, Republic of Singapore
| | - Rashidah Othman
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
| | - Ching Ann Tee
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
| | - Li Ching Ong
- Invivocue Pte Ltd, 51 Science Park Road, #01-11/13 The Aries, Singapore Science Park II, Singapore, 117586, Republic of Singapore
| | - Yuehua Wang
- Invivocue Pte Ltd, 51 Science Park Road, #01-11/13 The Aries, Singapore Science Park II, Singapore, 117586, Republic of Singapore
| | - Irwin Tan
- Invivocue Pte Ltd, 51 Science Park Road, #01-11/13 The Aries, Singapore Science Park II, Singapore, 117586, Republic of Singapore
| | - Jaylen Tan
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
| | - Yanmeng Yang
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
| | - Zheng Yang
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore
- Department of Orthopaedic Surgery, National University of Singapore, NUHS, 1E Kent Ridge RoadTower Block 11, Singapore, 119288, Republic of Singapore
- NUS Tissue Engineering Program, Life Sciences Institute, National University of Singapore, 27 Medical Drive, DSO (Kent Ridge) Building, Level 4, Singapore, 117510, Republic of Singapore
| | - Qingfeng Chen
- Institute of Molecular and Cell Biology (IMCB), Agency for Science, Technology and Research (A*STAR), 61 Biopolis Drive, Proteos, Singapore, 138673, Republic of Singapore.
- Department of Microbiology and Immunology, Yong Loo Lin School of Medicine, National University of Singapore, 5 Science Drive 2, Singapore, 117545, Republic of Singapore.
| | - Laurie A Boyer
- Critical Analytics for Manufacturing of Personalized Medicine (CAMP), Interdisciplinary Research Group, Singapore-MIT Alliance for Research and Technology (SMART), 1 Create Way, Enterprise Wing, #04-13/14, Singapore, 138602, Republic of Singapore.
- Department of Biological Engineering, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
- Department of Biology, Massachusetts Institute of Technology, 77 Massachusetts Avenue, Cambridge, MA, 02139, USA.
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Hayden MR. Overview and New Insights into the Metabolic Syndrome: Risk Factors and Emerging Variables in the Development of Type 2 Diabetes and Cerebrocardiovascular Disease. Medicina (B Aires) 2023; 59:medicina59030561. [PMID: 36984562 PMCID: PMC10059871 DOI: 10.3390/medicina59030561] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/05/2023] [Revised: 03/04/2023] [Accepted: 03/10/2023] [Indexed: 03/16/2023] Open
Abstract
Metabolic syndrome (MetS) is considered a metabolic disorder that has been steadily increasing globally and seems to parallel the increasing prevalence of obesity. It consists of a cluster of risk factors which traditionally includes obesity and hyperlipidemia, hyperinsulinemia, hypertension, and hyperglycemia. These four core risk factors are associated with insulin resistance (IR) and, importantly, the MetS is known to increase the risk for developing cerebrocardiovascular disease and type 2 diabetes mellitus. The MetS had its early origins in IR and syndrome X. It has undergone numerous name changes, with additional risk factors and variables being added over the years; however, it has remained as the MetS worldwide for the past three decades. This overview continues to add novel insights to the MetS and suggests that leptin resistance with hyperleptinemia, aberrant mitochondrial stress and reactive oxygen species (ROS), impaired folate-mediated one-carbon metabolism with hyperhomocysteinemia, vascular stiffening, microalbuminuria, and visceral adipose tissues extracellular vesicle exosomes be added to the list of associated variables. Notably, the role of a dysfunctional and activated endothelium and deficient nitric oxide bioavailability along with a dysfunctional and attenuated endothelial glycocalyx, vascular inflammation, systemic metainflammation, and the important role of ROS and reactive species interactome are discussed. With new insights and knowledge regarding the MetS comes the possibility of new findings through further research.
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Affiliation(s)
- Melvin R Hayden
- Department of Internal Medicine, Endocrinology Diabetes and Metabolism, Diabetes and Cardiovascular Disease Center, University of Missouri School of Medicine, One Hospital Drive, Columbia, MO 65211, USA
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Binayi F, Moslemi M, Khodagholi F, Hedayati M, Zardooz H. Long-term high-fat diet disrupts lipid metabolism and causes inflammation in adult male rats: possible intervention of endoplasmic reticulum stress. Arch Physiol Biochem 2023; 129:204-212. [PMID: 32907408 DOI: 10.1080/13813455.2020.1808997] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
This study investigated the effect of long-term high-fat diet (HFD) on plasma lipid profile and probability of inflammation in adult rats. After weaning, male offspring were divided into six groups based on diet type and medication. After 20 weeks of dietary intake, 4-PBA (endoplasmic reticulum (ER) stress inhibitor) was injected for three days. Then, blood samples were taken to measure plasma concentrations of low-density lipoprotein (LDL), triglyceride (TG), high-density lipoprotein (HDL), cholesterol, leptin and interleukin 1-β (IL 1-β). The HFD increased body weight and food intake and intra-abdominal fat and thymus weights, which were associated with elevated plasma leptin level. Moreover, HFD increased plasma concentrations of TG, LDL, cholesterol and IL 1-β and decreased HDL level. Injection of 4-PBA reversed the plasma parameters changes caused by HFD. It seems that long-term HFD feeding through inducing the ER stress, disrupted the lipid metabolism and resulted in inflammation.
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Affiliation(s)
- Fateme Binayi
- Department of Physiology, School of Medicine, Student Research Committee, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Moslemi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Fariba Khodagholi
- Neuroscience Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- NeuroBiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Mehdi Hedayati
- Cellular and Molecular Endocrine Research Center, Research Institute for Endocrine Sciences, Shahid Beheshti University of Medical Sciences, Tehran, Iran
| | - Homeira Zardooz
- Neurophysiology Research Center, Shahid Beheshti University of Medical Sciences, Tehran, Iran
- Department of Physiology, School of Medicine, Shahid Beheshti University of Medical Sciences, Tehran, Iran
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8
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Michalak A, Kasztelan-Szczerbińska B, Cichoż-Lach H. Impact of Obesity on the Course of Management of Inflammatory Bowel Disease—A Review. Nutrients 2022; 14:nu14193983. [PMID: 36235636 PMCID: PMC9573343 DOI: 10.3390/nu14193983] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2022] [Revised: 09/16/2022] [Accepted: 09/19/2022] [Indexed: 11/16/2022] Open
Abstract
It is already well-known that visceral adipose tissue is inseparably related to the pathogenesis, activity, and general outcome of inflammatory bowel disease (IBD). We are getting closer and closer to the molecular background of this loop, finding certain relationships between activated mesenteric tissue and inflammation within the lumen of the gastrointestinal tract. Recently, relatively new data have been uncovered, indicating a direct impact of body fat on the pattern of pharmacological treatment in the course of IBD. On the other hand, ileal and colonic types of Crohn’s disease and ulcerative colitis appear to be more diversified than it was thought in the past. However, the question arises whether at this stage we are able to translate this knowledge into the practical management of IBD patients or we are still exploring the scientific background of this pathology, having no specific tools to be used directly in patients. Our review explores IBD in the context of obesity and associated disorders, focusing on adipokines, creeping fat, and possible relationships between these disorders and the treatment of IBD patients.
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9
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Chronic Leptin Deficiency Improves Tolerance of Physiological Damage and Host-Pathogen Cooperation during Yersinia pseudotuberculosis Infection. Infect Immun 2022; 90:e0024222. [PMID: 35924898 PMCID: PMC9476980 DOI: 10.1128/iai.00242-22] [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: 02/06/2023] Open
Abstract
To combat infections, hosts employ a combination of antagonistic and cooperative defense strategies. The former refers to pathogen killing mediated by resistance mechanisms, while the latter refers to physiological defense mechanisms that promote host health during infection independent of pathogen killing, leading to an apparent cooperation between the host and the pathogen. Previous work has shown that Leptin, a pleiotropic hormone that plays a central role in regulating appetite and energy metabolism, is indispensable for resistance mechanisms, while a role for Leptin signaling in cooperative host-pathogen interactions remains unknown. Using a mouse model of Yersinia pseudotuberculosis (Yptb) infection, an emerging pathogen that causes fever, diarrhea, and mesenteric lymphadenitis in humans, we found that the physiological effects of chronic Leptin-signaling deficiency conferred protection from Yptb infection due to increased host-pathogen cooperation rather than greater resistance defenses. The protection against Yptb infection was independent of differences in food consumption, lipolysis, or fat mass. Instead, we found that the chronic absence of Leptin signaling protects from a shift to lipid utilization during infection that contributes to Yptb lethality. Furthermore, we found that the survival advantage conferred by Leptin deficiency was associated with increased liver and kidney damage. Our work reveals an additional level of complexity for the role of Leptin in infection defense and demonstrates that in some contexts, in addition to tolerating the pathogen, tolerating organ damage is more beneficial for survival than preventing the damage.
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10
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Brazão V, Colato RP, Santello FH, Duarte A, Goulart A, Sampaio PA, Pacheco Silva CB, Tirapelli CR, Costa RM, Tostes RC, do Prado JC. Melatonin regulates antioxidant defense and inflammatory response by activating Nrf2-dependent mechanisms and inhibiting NFkappaB expression in middle-aged T. cruzi infected rats. Exp Gerontol 2022; 167:111895. [PMID: 35843349 DOI: 10.1016/j.exger.2022.111895] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2022] [Revised: 07/05/2022] [Accepted: 07/11/2022] [Indexed: 12/29/2022]
Abstract
Oxidative stress with higher levels of leptin and inflammatory response are key processes related to pathogenesis of both T. cruzi infection and aging. Nuclear factor erythroid 2-related factor 2 (Nrf2) controls the expression of several genes implicated in the oxidative stress response in many pathological conditions. Melatonin is a pleiotropic hormone with, antioxidant, anti-inflammatory and anti-aging actions. Then, we hypothesized that Nrf2 response is impaired during the acute T. cruzi (9 days) infection and that melatonin rescues Nrf2 responses. Young (5 weeks-old) and middle-aged (18 months-old) male Wistar rats were infected with T. cruzi. Nrf2 translocation and markers of inflammation and oxidative stress were analyzed in blood and spleen. Increased apoptosis levels and oxidative stress indicators were observed in the rat spleen during T. cruzi infection. These responses were accompanied by decreased Nrf2 expression and increased expression of nuclear factor kappa B (NFκB). Melatonin (5 mg/kg/day; p.o. gavage) attenuated the superoxide anion (O2-) and hydrogen peroxide (H2O2) production induced by T. cruzi infection. Increased expressions of catalase and superoxide dismutase (SOD) were detected in the spleen of melatonin-treated rats infected with T. cruzi. Melatonin treatment inhibited the spleen NF-κB activation and downregulates the levels of circulating interleukin (IL)-4, IL-10 and tumor necrosis factor (TNF)-α in T. cruzi middle-aged infected rats. Increased levels of the chemokine CXCL1 in middle-aged control rats was observed, confirming that aging alters the production of this chemokine. In T. cruzi infected young animals, CXCL1 was up-regulated when compared to non-infected young ones. For young or middle-aged animals, melatonin treatment had no significant effect on CXCL1 levels. Our findings demonstrate an important role for Nrf2/NF-kB regulation as a possible mechanism by which melatonin attenuates oxidative stress, and provide new insights for further studies of this indoleamine as a therapeutic co-adjuvant agent against T. cruzi infection.
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Affiliation(s)
- Vânia Brazão
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil.
| | - Rafaela Pravato Colato
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Fabricia Helena Santello
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Andressa Duarte
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Amanda Goulart
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Pedro Alexandre Sampaio
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
| | - Carla B Pacheco Silva
- Department of Psychiatric Nursing and Human Sciences, Laboratory of Pharmacology, College of Nursing of Ribeirão Preto, USP, Ribeirão Preto, SP, Brazil
| | - Carlos Renato Tirapelli
- Department of Psychiatric Nursing and Human Sciences, Laboratory of Pharmacology, College of Nursing of Ribeirão Preto, USP, Ribeirão Preto, SP, Brazil
| | - Rafael M Costa
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirao Preto, SP, Brazil; Special Academic Unit of Health Sciences, Federal University of Jatai, Jatai, GO, Brazil
| | - Rita C Tostes
- Department of Pharmacology, Ribeirão Preto Medical School, University of São Paulo, Ribeirao Preto, SP, Brazil
| | - José Clóvis do Prado
- College of Pharmaceutical Sciences of Ribeirão Preto (FCFRP), University of São Paulo, Ribeirão Preto, SP, Brazil
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11
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Gao SJ, Liu DQ, Li DY, Sun J, Zhang LQ, Wu JY, Song FH, Zhou YQ, Mei W. Adipocytokines: Emerging therapeutic targets for pain management. Biomed Pharmacother 2022; 149:112813. [PMID: 35279597 DOI: 10.1016/j.biopha.2022.112813] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2022] [Revised: 03/04/2022] [Accepted: 03/08/2022] [Indexed: 11/15/2022] Open
Abstract
Although pain has lower mortality rates than cancer, diabetes and stroke, pain is a predominate source of distress and disability. However, the management of pain remains an enormous problem. Many drugs used to pain treatment have more or less side effects. Therefore, the development of novel therapeutic target is critical for the treatment of pain. Notably, studies have shown that adipocytokines have a dual role in pain. Growing shreds of evidence shows that the levels of adipocytokines are upregulated or downregulated in the development of pain. In addition, substantial evidence indicates that regulation of adipocytokines levels in models of pain attenuates or promotes pain behaviors. In this review, we summarized and discussed the effect of adipocytokines in pain. These evidence indicates that adipocytokines attenuate or promote pain behaviors through interacting with their receptors, activating serotonin pathway, interacting with μ-opioid receptor, activating microglia, infiltrating macrophage and so on. Overall, adipocytokines have some potential in treating pain, but the underlying mechanisms remain unclear and need to be further studied.
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Affiliation(s)
- Shao-Jie Gao
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Dai-Qiang Liu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Dan-Yang Li
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Jia Sun
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Long-Qing Zhang
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Jia-Yi Wu
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Fan-He Song
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China
| | - Ya-Qun Zhou
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.
| | - Wei Mei
- Department of Anesthesiology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430000, China.
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12
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Joo YB, Lee KB, Sul B, Lee HS, Lim SH, Park YJ. Effect of resistance exercise on serum leptin levels in a prospective longitudinal study of women patients with rheumatoid arthritis. Arthritis Res Ther 2022; 24:76. [PMID: 35346353 PMCID: PMC8962456 DOI: 10.1186/s13075-022-02765-2] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2022] [Accepted: 03/15/2022] [Indexed: 11/15/2022] Open
Abstract
Background Exercise has an anti-inflammatory effect and reduces fat mass. Leptin has been known to be proinflammatory adipokines mainly produced by adipocytes. However, few studies have investigated the association between exercise and changes in serum leptin levels of patients with RA. This study evaluated the effect of an individualized resistance exercise on inflammatory markers including leptin as well as muscle strength and exercise capacity in patients with rheumatoid arthritis (RA). Methods A total of 42 age- and sex-matched participants were assigned to a resistance exercise program (60 min, once a week for 12 weeks, and self-exercise twice a week) or to a control group. Muscle strength, exercise capacities, and inflammatory markers such as cytokines and adipokines were assessed at baseline and at 12 weeks follow-up. Longitudinal changes in muscle strength, exercise capacity, cytokines, and adipokines between groups were tested with repeated measures analysis of variance or using the generalized estimating equation, with adjustment for baseline disease activity score 28-C response protein as a covariate. Results A total of 37 of 42 female patients with RA completed this prospective intervention study. Grip strength improved significantly in the exercise group (P < 0.05), while no between-group changes were found. Quadriceps contraction power (P for group-time interaction = 0.035 for the right side and P for group-time interaction = 0.012 for the left side) and 6-minute walking distance (P for group-time interaction = 0.021) were all improved significantly in the exercise group compared with the control group. In addition, serum leptin levels were significantly decreased in the exercise group compared with the control group (P for group-time interaction = 5.22 × 10−5), but not the other cytokines or adipokines. The change in serum leptin levels correlated with the changes in fat mass (Rho = 0.491, P= 0.015) and visceral fat area (Rho = 0.501, P= 0.013). Conclusion In addition to muscle strength and exercise capacity, the 12 weeks of individualized resistance exercise reduced serum leptin levels in keeping with body fat mass or visceral fat area, suggesting that serum leptin levels might be a surrogate marker of exercise in RA.
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Affiliation(s)
- Young Bin Joo
- Division of Rheumatology, Department of Internal Medicine, Hanyang University Guri Hospital, Guri, Republic of Korea
| | - Kyoung Bo Lee
- Department of Rehabilitation Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Bomi Sul
- Department of Rehabilitation Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea
| | - Hye-Soon Lee
- Division of Rheumatology, Department of Internal Medicine, Hanyang University Guri Hospital, Guri, Republic of Korea.,Hanyang University Institute for Rheumatology Research, Seoul, Republic of Korea
| | - Seong Hoon Lim
- Department of Rehabilitation Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
| | - Yune-Jung Park
- Division of Rheumatology, Department of Internal Medicine, St. Vincent's Hospital, College of Medicine, The Catholic University of Korea, Seoul, Republic of Korea.
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Iacob SA, Iacob DG. Non-Alcoholic Fatty Liver Disease in HIV/HBV Patients - a Metabolic Imbalance Aggravated by Antiretroviral Therapy and Perpetuated by the Hepatokine/Adipokine Axis Breakdown. Front Endocrinol (Lausanne) 2022; 13:814209. [PMID: 35355551 PMCID: PMC8959898 DOI: 10.3389/fendo.2022.814209] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/12/2021] [Accepted: 01/10/2022] [Indexed: 12/11/2022] Open
Abstract
Non-alcoholic fatty liver disease (NAFLD) is strongly associated with the metabolic syndrome and is one of the most prevalent comorbidities in HIV and HBV infected patients. HIV plays an early and direct role in the development of metabolic syndrome by disrupting the mechanism of adipogenesis and synthesis of adipokines. Adipokines, molecules that regulate the lipid metabolism, also contribute to the progression of NAFLD either directly or via hepatic organokines (hepatokines). Most hepatokines play a direct role in lipid homeostasis and liver inflammation but their role in the evolution of NAFLD is not well defined. The role of HBV in the pathogenesis of NAFLD is controversial. HBV has been previously associated with a decreased level of triglycerides and with a protective role against the development of steatosis and metabolic syndrome. At the same time HBV displays a high fibrogenetic and oncogenetic potential. In the HIV/HBV co-infection, the metabolic changes are initiated by mitochondrial dysfunction as well as by the fatty overload of the liver, two interconnected mechanisms. The evolution of NAFLD is further perpetuated by the inflammatory response to these viral agents and by the variable toxicity of the antiretroviral therapy. The current article discusses the pathogenic changes and the contribution of the hepatokine/adipokine axis in the development of NAFLD as well as the implications of HIV and HBV infection in the breakdown of the hepatokine/adipokine axis and NAFLD progression.
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Affiliation(s)
- Simona Alexandra Iacob
- Department of Infectious Diseases, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Infectious Diseases, National Institute of Infectious Diseases “Prof. Dr. Matei Bals”, Bucharest, Romania
| | - Diana Gabriela Iacob
- Department of Infectious Diseases, Carol Davila University of Medicine and Pharmacy, Bucharest, Romania
- Department of Infectious Diseases, Emergency University Hospital, Bucharest, Romania
- *Correspondence: Diana Gabriela Iacob,
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14
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Drews B, Milojevic V, Robles M, Wimel L, Dubois C, Vegas AR, Giller K, Chavatte-Palmer P, Daniel H, Giesbertz P, Bruckmaier R, Ulbrich SE. Moderate differences in plasma leptin in mares have no effect on either the amino acid or the fatty acid composition of the uterine fluid. J Equine Vet Sci 2021; 109:103827. [PMID: 34843890 DOI: 10.1016/j.jevs.2021.103827] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 10/18/2021] [Accepted: 11/22/2021] [Indexed: 10/19/2022]
Abstract
Female mammalian reproductive functions are closely linked to body condition and metabolic status. Energy homeostasis is regulated by endocrine hormones such as insulin, IGF-I, leptin and adiponectin via the hypothalamic-pituitary-adrenal axis. These metabolic hormones and their receptors are also expressed in reproductive tissues and the embryo. We investigated the relationship between circulating leptin and the fatty acid (FA) and amino acid (AA) composition of the equine uterine fluid (UF) and peripheral blood plasma (BP) by using a mass spectrometry-based approach. UF and BP were collected from ten broodmares on days 6 and 7 post ovulation, respectively. The mares were retrospectively assigned to two groups according to their BP leptin concentrations (high leptin (> 1.6 ng/ml) versus low leptin (<0.8 ng/ml)). Specific AA and FA compositions for BP and UF were found with different levels of respective metabolite abundances. The main FAs in BP were stearic, palmitic and linoleic acid. In UF, the three most abundant FAs were eicosapentaenoic, arachidonic and stearic acid. The AA profile of BP was dominated by glycine, glutamine, serine and alanine, which were likewise among the highly abundant AAs in UF. In UF, glutamic acid had by far the highest concentration. Therefore, BP leptin concentration within a physiological range do not seem to affect the specific FA nor the AA composition of the UF. The composition of the UF may therefore be mediated by local rather than by peripheral metabolic hormones.
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Affiliation(s)
- Barbara Drews
- ETH Zurich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland.
| | - Vladimir Milojevic
- ETH Zurich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland
| | - Morgane Robles
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350, Jouy-en-Josas, France; Ecole Nationale Vétérinaire d'Alfort, BREED, 94700, Maisons-Alfort, France
| | - L Wimel
- IFCE, Station expérimentale de la Valade, 19370 Chamberet, France.
| | - C Dubois
- IFCE, Station expérimentale de la Valade, 19370 Chamberet, France.
| | - A Rudolf Vegas
- ETH Zurich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland
| | - K Giller
- ETH Zurich, Animal Nutrition, Institute of Agricultural Sciences, Zurich, Switzerland.
| | - P Chavatte-Palmer
- Université Paris-Saclay, UVSQ, INRAE, BREED, 78350, Jouy-en-Josas, France
| | - H Daniel
- Nutritional Physiology, Technische Universität München, Freising, Germany
| | - P Giesbertz
- Nutritional Physiology, Technische Universität München, Freising, Germany.
| | - Rupert Bruckmaier
- Veterinary Physiology, Department of Clinical Research and Veterinary Public Health, Vetsuisse Faculty Bern, University of Bern, Switzerland.
| | - S E Ulbrich
- ETH Zurich, Animal Physiology, Institute of Agricultural Sciences, Zurich, Switzerland.
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15
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Kalpaklıoglu AF, Baccioglu A, Yalim SA. Does serum leptin levels differ between patients with rhinitis of allergic versus nonallergic aetiology? CLINICAL RESPIRATORY JOURNAL 2021; 15:1352-1358. [PMID: 34432379 DOI: 10.1111/crj.13440] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/24/2020] [Revised: 08/10/2021] [Accepted: 08/17/2021] [Indexed: 11/28/2022]
Abstract
BACKGROUND Leptin may play a critical role in airway inflammation. However, it has rarely been evaluated in rhinitis with different aetiology. This study aimed to compare the serum leptin levels between allergic rhinitis (AR) and nonallergic rhinitis (NAR). METHODS Patients with chronic rhinitis were classified due to skin prick (ALK-Abello/Madrid) and/or serum-specific immunoglobulin E tests (UniCAP 100-Pharmacia), against to aeroallergens if concordant with symptoms. RESULTS A total of 398 patients with a mean age of 29.03 years were recruited and grouped as AR and NAR. Mean serum leptin levels were similar in patients with NAR and AR, as well as in patients with and without asthma, but were significantly higher in females than males in both groups. Also, leptin levels were significantly higher in obese than nonobese patients in AR. In correlation analysis, leptin levels were found to be correlated with female gender, older age, and high body mass index (BMI) in the whole group. Despite the higher total nasal symptom score (TNSS) in patients with AR compared with NAR, there was no association of leptin levels with TNSS, severity and seasonality of symptoms, and allergen sensitization. In logistic regression analysis, younger age and high serum leptin levels were found to be independent predictors for the diagnosis of AR. CONCLUSIONS We conclude that female patients with high BMI are more prone to AR probably due to immunological effects of adipose tissue, in addition to hormonal factors. This study showed that leptin measurement has limited value as a sole diagnostic tool to differentiate AR and NAR.
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Affiliation(s)
| | - Ayşe Baccioglu
- Division of Immunology and Allergy, Kirikkale University Medical Faculty, Kirikkale, Turkey
| | - Sümeyra Alan Yalim
- Division of Immunology and Allergy, Kirikkale University Medical Faculty, Kirikkale, Turkey
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16
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Bellinger DL, Wood C, Wergedal JE, Lorton D. Driving β 2- While Suppressing α-Adrenergic Receptor Activity Suppresses Joint Pathology in Inflammatory Arthritis. Front Immunol 2021; 12:628065. [PMID: 34220796 PMCID: PMC8249812 DOI: 10.3389/fimmu.2021.628065] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2020] [Accepted: 03/05/2021] [Indexed: 12/20/2022] Open
Abstract
Objective Hypersympathetic activity is prominent in rheumatoid arthritis, and major life stressors precede onset in ~80% of patients. These findings and others support a link between stress, the sympathetic nervous system and disease onset and progression. Here, we extend previous research by evaluating how selective peripherally acting α/β2-adrenergic drugs affect joint destruction in adjuvant-induced arthritis. Methods Complete Freund's adjuvant induced inflammatory arthritis in male Lewis rats. Controls received no treatment. Arthritic rats then received vehicle or twice-daily treatment with the α-adrenergic antagonist, phentolamine (0.5 mg/day) and the β2-adrenergic agonist, terbutaline (1200 µg/day, collectively named SH1293) from day (D) of disease onset (D12) through acute (D21) and severe disease (D28). Disease progression was assessed in the hind limbs using dorsoplantar widths, X-ray analysis, micro-computed tomography, and routine histology on D14, D21, and D28 post-immunization. Results On D21, SH1293 significantly attenuated arthritis in the hind limbs, based on reduced lymphocytic infiltration, preservation of cartilage, and bone volume. Pannus formation and sympathetic nerve loss were not affected by SH1293. Bone area and osteoclast number revealed high- and low-treatment-responding groups. In high-responding rats, treatment with SH1293 significantly preserved bone area and decreased osteoclast number, data that correlated with drug-mediated joint preservation. SH1293 suppressed abnormal bone formation based on reduced production of osteophytes. On D28, the arthritic sparing effects of SH1293 on lymphocytic infiltration, cartilage and bone sparing were maintained at the expense of bone marrow adipocity. However, sympathetic nerves were retracted from the talocrural joint. Conclusion and Significance Our findings support a significant delay in early arthritis progression by treatment with SH1293. Targeting sympathetic neurotransmission may provide a strategy to slow disease progression.
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MESH Headings
- Adrenergic alpha-Antagonists/pharmacology
- Adrenergic beta-2 Receptor Agonists/pharmacology
- Animals
- Arthritis, Experimental/chemically induced
- Arthritis, Experimental/metabolism
- Arthritis, Experimental/pathology
- Arthritis, Experimental/prevention & control
- Drug Combinations
- Freund's Adjuvant
- Joints/diagnostic imaging
- Joints/drug effects
- Joints/metabolism
- Joints/pathology
- Male
- Phentolamine/pharmacology
- Rats, Inbred Lew
- Receptors, Adrenergic, alpha/drug effects
- Receptors, Adrenergic, alpha/metabolism
- Receptors, Adrenergic, beta-2/drug effects
- Receptors, Adrenergic, beta-2/metabolism
- Signal Transduction
- Terbutaline/pharmacology
- Rats
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Affiliation(s)
- Denise L. Bellinger
- Department of Human Anatomy and Pathology, Loma Linda University School of Medicine, Loma Linda, CA, United States
| | - Carlo Wood
- Department of Human Anatomy and Pathology, Loma Linda University School of Medicine, Loma Linda, CA, United States
| | - Jon E. Wergedal
- Musculoskeletal Disease Center, VA Loma Linda Healthcare System, Loma Linda, CA, United States
- Departments of Medicine and Biochemistry, Loma Linda University, Loma Linda, CA, United States
| | - Dianne Lorton
- Hoover Arthritis Research Center, Banner Health Research Institute, Sun City, AZ, United States
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17
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Roth CL, Molica F, Kwak BR. Browning of White Adipose Tissue as a Therapeutic Tool in the Fight against Atherosclerosis. Metabolites 2021; 11:319. [PMID: 34069148 PMCID: PMC8156962 DOI: 10.3390/metabo11050319] [Citation(s) in RCA: 14] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2021] [Revised: 05/05/2021] [Accepted: 05/13/2021] [Indexed: 02/07/2023] Open
Abstract
Despite continuous medical advances, atherosclerosis remains the prime cause of mortality worldwide. Emerging findings on brown and beige adipocytes highlighted that these fat cells share the specific ability of non-shivering thermogenesis due to the expression of uncoupling protein 1. Brown fat is established during embryogenesis, and beige cells emerge from white adipose tissue exposed to specific stimuli like cold exposure into a process called browning. The consecutive energy expenditure of both thermogenic adipose tissues has shown therapeutic potential in metabolic disorders like obesity and diabetes. The latest data suggest promising effects on atherosclerosis development as well. Upon cold exposure, mice and humans have a physiological increase in brown adipose tissue activation and browning of white adipocytes is promoted. The use of drugs like β3-adrenergic agonists in murine models induces similar effects. With respect to atheroprotection, thermogenic adipose tissue activation has beneficial outcomes in mice by decreasing plasma triglycerides, total cholesterol and low-density lipoproteins, by increasing high-density lipoproteins, and by inducing secretion of atheroprotective adipokines. Atheroprotective effects involve an unaffected hepatic clearance. Latest clinical data tend to find thinner atherosclerotic lesions in patients with higher brown adipose tissue activity. Strategies for preserving healthy arteries are a major concern for public health.
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Affiliation(s)
| | - Filippo Molica
- Department of Pathology and Immunology, University of Geneva, CH-1211 Geneva, Switzerland; (C.L.R.); (B.R.K.)
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18
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The Role of Lipids, Lipid Metabolism and Ectopic Lipid Accumulation in Axon Growth, Regeneration and Repair after CNS Injury and Disease. Cells 2021; 10:cells10051078. [PMID: 34062747 PMCID: PMC8147289 DOI: 10.3390/cells10051078] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/20/2021] [Accepted: 04/27/2021] [Indexed: 02/06/2023] Open
Abstract
Axons in the adult mammalian nervous system can extend over formidable distances, up to one meter or more in humans. During development, axonal and dendritic growth requires continuous addition of new membrane. Of the three major kinds of membrane lipids, phospholipids are the most abundant in all cell membranes, including neurons. Not only immature axons, but also severed axons in the adult require large amounts of lipids for axon regeneration to occur. Lipids also serve as energy storage, signaling molecules and they contribute to tissue physiology, as demonstrated by a variety of metabolic disorders in which harmful amounts of lipids accumulate in various tissues through the body. Detrimental changes in lipid metabolism and excess accumulation of lipids contribute to a lack of axon regeneration, poor neurological outcome and complications after a variety of central nervous system (CNS) trauma including brain and spinal cord injury. Recent evidence indicates that rewiring lipid metabolism can be manipulated for therapeutic gain, as it favors conditions for axon regeneration and CNS repair. Here, we review the role of lipids, lipid metabolism and ectopic lipid accumulation in axon growth, regeneration and CNS repair. In addition, we outline molecular and pharmacological strategies to fine-tune lipid composition and energy metabolism in neurons and non-neuronal cells that can be exploited to improve neurological recovery after CNS trauma and disease.
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19
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Birlutiu V, Boicean LC. Serum leptin level as a diagnostic and prognostic marker in infectious diseases and sepsis: A comprehensive literature review. Medicine (Baltimore) 2021; 100:e25720. [PMID: 33907162 PMCID: PMC8084034 DOI: 10.1097/md.0000000000025720] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/13/2020] [Revised: 02/27/2021] [Accepted: 04/11/2021] [Indexed: 12/24/2022] Open
Abstract
BACKGROUND Infections and sepsis are common causes of morbidity and mortality, with an increasing incidence worldwide. Leptin is involved in the inflammatory process and may modulate the cytokine production, immune cell proliferation and endothelial function. There are conflicting results regarding alterations of leptin levels in infectious diseases and the outcome from sepsis.The aim of the current article is to provide an overview of the medical literature on the correlations between variations of leptin levels and infectious diseases and sepsis. METHODS We performed an extensive literature search in PubMed and Google Scholar databases, using keywords to identify articles related to leptin in infectious diseases and sepsis. Searches were referenced using medical subject headings that included "leptin," "adipokines," "sepsis," "infectious diseases," "leptin deficiency," "leptin resistance" or "hyperleptinemia." The language of publication, journal, or country were not included as limitation criteria.Articles or abstracts containing adequate information, such as age, sex, anthropometric indices, clinical presentation, comorbidities, and management were included in the study, whereas articles with insufficient clinical and demographic data were excluded. We assessed the quality of the studies selected.The final review of all databases was conducted on June 18, 2020. RESULTS We find the results from the current review to be of great importance due to the possible therapeutic role of leptin analogs in states of leptin deficiency associated with infectious diseases or sepsis.In hyperleptinemia, a therapeutic plan for obtaining leptin neutralization also needs further investigations. This could lead to the reduction of proinflammatory responses.There is a need for further studies to demonstrate the specificity and sensitivity of leptin in the early diagnosis of sepsis and the need to measure serum leptin levels in routine evaluation of the critical patient. CONCLUSION The multiple effects of leptin are of growing interest, but further studies are needed to elucidate the role of leptin signalling in infectious diseases and sepsis. Because very few human studies are reported, we recommend the need for further research.Better understanding of the pathophysiology of sepsis and the implication of circulating total leptin in this process could help physicians in managing this life-threatening condition.
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Affiliation(s)
- Victoria Birlutiu
- “Lucian Blaga” University of Sibiu, Faculty of Medicine
- Academic Emergency Hospital Sibiu—Infectious Diseases Clinic, Sibiu, Romania
| | - Loredana Camelia Boicean
- “Lucian Blaga” University of Sibiu, Faculty of Medicine
- Academic Emergency Hospital Sibiu—Infectious Diseases Clinic, Sibiu, Romania
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Jeong YJ, Park HY, Nam HK, Lee KW. Fermented Maillard Reaction Products by Lactobacillus gasseri 4M13 Alters the Intestinal Microbiota and Improves Dysfunction in Type 2 Diabetic Mice with Colitis. Pharmaceuticals (Basel) 2021; 14:299. [PMID: 33800583 PMCID: PMC8066505 DOI: 10.3390/ph14040299] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 03/25/2021] [Accepted: 03/25/2021] [Indexed: 12/15/2022] Open
Abstract
Inflammatory bowel disease is a chronic relapsing disease. Multiple factors can cause inflammatory bowel disease (IBD), including diet, imbalance of the immune system, and impaired intestinal barrier function. Type 2 diabetes mellitus is a complex and chronic metabolic disease caused by a combination of insulin resistance and an ineffective insulin secretory response. The co-occurrence of these two diseases, demonstrating interrelated effects within the gut microbiota, has been frequently reported. This study evaluated the effects of a fermented glycated conjugate of whey protein and galactose with Lactobacillus gasseri 4M13 (FMRP) to prevent type 2 diabetes mellitus with inflammatory bowel disease. C57BLKS/J- db/db mice were orally administered FMRP for 14 consecutive days and 2% dextran sulfate sodium (DSS) in water ad libitum for 5 days to induce colitis. FMRP-fed mice showed improved insulin secretion and symptoms of colitis. Compared to the DSS group, the FMRP group showed a decreased abundance of six bacterial genera and increased abundance of Alistipes and Hungateiclostridium. In cecal contents, the levels of short-chain fatty acids increased in the FMRP group compared to those in the DSS group. Continuous administration of FMRP thus may improve the homeostasis of not only insulin secretion and inflammation, but also the intestinal environment in inflammatory bowel disease and type 2 diabetes mellitus.
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Affiliation(s)
- Yu-Jin Jeong
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 1, 5-ga, Anam-dong, Sungbuk-gu, Seoul 02841, Korea; (Y.-J.J.); (H.-K.N.)
| | - Ho-Young Park
- Research Division of Food Functionality, Korea Food Research Institute, Wanju 55365, Korea;
| | - Han-Kyul Nam
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 1, 5-ga, Anam-dong, Sungbuk-gu, Seoul 02841, Korea; (Y.-J.J.); (H.-K.N.)
| | - Kwang-Won Lee
- Department of Biotechnology, College of Life Sciences and Biotechnology, Korea University, 1, 5-ga, Anam-dong, Sungbuk-gu, Seoul 02841, Korea; (Y.-J.J.); (H.-K.N.)
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21
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Wang J, Xu Y, Zhang X, Wang S, Peng Z, Guo J, Jiang H, Liu J, Xie Y, Wang J, Li X, Liao J, Wan C, Yu L, Hu J, Liu B, Liu Z. Leptin correlates with monocytes activation and severe condition in COVID-19 patients. J Leukoc Biol 2021; 110:9-20. [PMID: 33404078 DOI: 10.1002/jlb.5hi1020-704r] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/27/2020] [Revised: 11/23/2020] [Accepted: 12/07/2020] [Indexed: 12/15/2022] Open
Abstract
Excessive monocyte activation with the development of excessive or uncontrolled release of proinflammatory cytokines often results in host tissue injury and even death in patients with pneumonia caused by the 2019 novel coronavirus. However, the changes of cytokine profiles of coronavirus disease 2019 (COVID-19) patients, as well as the underlying mechanisms that are involved, remain unknown. Using a cytokine array containing 174 inflammation-related cytokines, we found significantly altered cytokine profiles in severe COVID-19 patients compared with those in mild patients or healthy controls, and identified leptin, CXCL-10, IL-6, IL-10, IL-12, and TNF-α as the top differentially expressed cytokines. Notably, leptin showed high consistency with CXCL-10 and TNF-α in predicting disease severity, and correlated with body mass index, decreased lymphocyte counts, and disease progression. Further analysis demonstrated that monocytes in severe patients with higher leptin levels were inclined toward M1 polarization. Mechanistic studies revealed that leptin synergistically up-regulated expression levels of inflammatory cytokines and surface markers with IL-6 in monocytes through STAT3 and NF-κB signaling pathways. Collectively, our results suggest that overweight COVID-19 patients were prone to have higher leptin levels, which further activated monocytes, resulting in amplified or dysregulated immune responses. Taken together, our findings argue that leptin correlates severity of COVID-19 and may indicate a possible mechanism by which overweight patients have a greater tendency to develop severe conditions.
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Affiliation(s)
- Jingya Wang
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Yinyin Xu
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Xiaoli Zhang
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Sheng Wang
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Ziyi Peng
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jing Guo
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Hongmei Jiang
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jing Liu
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Ying Xie
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Jingjing Wang
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Xin Li
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
| | - Juan Liao
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Chao Wan
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Lihua Yu
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Jinsong Hu
- Department of Cell Biology and Genetics, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China.,The Institute of Infection and Immunity, Xi'an Jiaotong University Health Science Center, Xi'an, Shaanxi, China
| | - Beizhong Liu
- Clinical Laboratory of Yongchuan Hospital, Chongqing Medical University, Chongqing, Chongqing, China.,Key Laboratory of Laboratory Medical Diagnostics, Ministry of Education, Department of Laboratory Medicine, Chongqing Medical University, Chongqing, Chongqing, China
| | - Zhiqiang Liu
- Tianjin Key Laboratory of Cellular Homeostasis and Human Diseases, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China.,Department of Physiology and Pathophysiology, School of Basic Medical Science, Tianjin Medical University, Heping, Tianjin, China
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22
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Maranesi M, Di Loria A, Dall’Aglio C, Piantedosi D, Lepri E, Ciaramella P, Mercati F. Leptin System in Obese Dog Skin: A Pilot Study. Animals (Basel) 2020; 10:ani10122338. [PMID: 33316917 PMCID: PMC7764193 DOI: 10.3390/ani10122338] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2020] [Revised: 12/04/2020] [Accepted: 12/07/2020] [Indexed: 02/07/2023] Open
Abstract
Simple Summary Obesity is a widespread phenomenon in pets and its growing trend is similar to the human one. It can be associated with skin pathologies but there is little information on this field in domestic animals. Since in obesity adipokine plasmatic levels changes, in this study leptin (LEP) system was evaluated in the skin of obese dogs to observe changes in peripheral tissue. LEP is a hormone produced mainly by the adipose tissue and its serum level may reflect body mass index and BCS. LEP is also expressed in the skin and it has a prominent role in the biology of this tissue promoting cell proliferation and regulating the wound healing process. Investigation performed in obese and normal-weight dogs evidenced LEP and leptin receptor (LEPR) immunostaining in several skin structures. As LEP expression regards, differences were non-significant, while the LEPR transcripts appeared 10 fold higher in obesedogs. No differences were observed in the composition of skin associated immune system. The obese group-increased LEPR expression suggests that the receptor modulates the system control. The LEP system changes in the skin under obesity conditions however, the exact role of LEP in obese dog skin needs further insights. Abstract Obesity predisposes to several health problems including skin diseases. However, information on the relationship between obesity and skin disorders in pets is very scarce. Leptin (LEP) is mainly produced by adipose tissue and has a prominent role in skin biology. This study evaluated the LEP system in the skin of obese dogs compared to normal-weight animals. The investigation was carried out on 10 obese (Obese group) and 10 normal-weight (Normal-weight group) dogs through Real-time PCR and immunohistochemistry. Cells of skin associated immune system were also evaluated. No differences were evidenced between the two groups as well as skin inflammation. LEP differences were no significant, while LEPR transcript appeared 10-fold higher in obesedogs than in normal-weight ones. Immunostaining for both molecules was observed in several skin structures such as the epidermis, hair follicles, and glands. No differences appeared in the skin associated immune system composition. This study is a preliminary report showing that LEP system changes in obese dog skin. The increased LEPR expression observed in the obese group suggests that the receptor plays a modulating role in the system control. However, the exact role of LEPin the skin under obesity conditions needs further elucidation.
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Affiliation(s)
- Margherita Maranesi
- Department of Veterinary Medicine, University of Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (F.M.)
| | - Antonio Di Loria
- Department of Veterinary Medicine and Animal Productions, University Federico II of Napoli, via F. Delpino 1, 080137 Napoli, Italy; (A.D.L.); (D.P.); (P.C.)
| | - Cecilia Dall’Aglio
- Department of Veterinary Medicine, University of Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (F.M.)
- Correspondence: (C.D.); (E.L.); Tel.: +39-075-585-7633 (C.D.); +39-075-585-7733 (E.L.)
| | - Diego Piantedosi
- Department of Veterinary Medicine and Animal Productions, University Federico II of Napoli, via F. Delpino 1, 080137 Napoli, Italy; (A.D.L.); (D.P.); (P.C.)
| | - Elvio Lepri
- Department of Veterinary Medicine, University of Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (F.M.)
- Correspondence: (C.D.); (E.L.); Tel.: +39-075-585-7633 (C.D.); +39-075-585-7733 (E.L.)
| | - Paolo Ciaramella
- Department of Veterinary Medicine and Animal Productions, University Federico II of Napoli, via F. Delpino 1, 080137 Napoli, Italy; (A.D.L.); (D.P.); (P.C.)
| | - Francesca Mercati
- Department of Veterinary Medicine, University of Perugia, via San Costanzo 4, 06126 Perugia, Italy; (M.M.); (F.M.)
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Martínez-Sánchez N. There and Back Again: Leptin Actions in White Adipose Tissue. Int J Mol Sci 2020; 21:ijms21176039. [PMID: 32839413 PMCID: PMC7503240 DOI: 10.3390/ijms21176039] [Citation(s) in RCA: 53] [Impact Index Per Article: 13.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 08/17/2020] [Accepted: 08/18/2020] [Indexed: 12/13/2022] Open
Abstract
Leptin is a hormone discovered almost 30 years ago with important implications in metabolism. It is primarily produced by white adipose tissue (WAT) in proportion to the amount of fat. The discovery of leptin was a turning point for two principle reasons: on one hand, it generated promising expectations for the treatment of the obesity, and on the other, it changed the classical concept that white adipose tissue was simply an inert storage organ. Thus, adipocytes in WAT produce the majority of leptin and, although its primary role is the regulation of fat stores by controlling lipolysis and lipogenesis, this hormone also has implications in other physiological processes within WAT, such as apoptosis, browning and inflammation. Although a massive number of questions related to leptin actions have been answered, the necessity for further clarification facilitates constantly renewing interest in this hormone and its pathways. In this review, leptin actions in white adipose tissue will be summarized in the context of obesity.
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24
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Frontela-Saseta C, González-Bermúdez CA, García-Marcos L. Diet: A Specific Part of the Western Lifestyle Pack in the Asthma Epidemic. J Clin Med 2020; 9:E2063. [PMID: 32630168 PMCID: PMC7408793 DOI: 10.3390/jcm9072063] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2020] [Revised: 06/22/2020] [Accepted: 06/27/2020] [Indexed: 01/04/2023] Open
Abstract
The Western lifestyle is a complex concept that includes the diet as the main axis of different factors which contribute to a detrimental effect on health, lower life expectancy and low quality-of-life. This type of diet is characterized by being high in calories, mainly provided by saturated fats, and rich in sugars that can lead to changes in immune cells and their responsiveness, by different mechanisms that have yet to be totally clarified. Inflammatory processes are perpetuated through different pathways, in which adipose tissue is a major factor. High fat stores in overweight and obesity accumulate energy but the endocrine function is also producing and releasing different bioactive compounds, adipokines, known to be pro-inflammatory and which play an important role in the pathogenesis of asthma. This review therefore explores the latest evidence regarding the adverse effect of the Western diet on adipose tissue inflammation and its causative effect on the asthma epidemic.
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Affiliation(s)
- Carmen Frontela-Saseta
- Department of Food Science and Nutrition, Faculty of Veterinary Sciences, Regional Campus of International Excellence “Campus Mare Nostrum”, 30100 Murcia, Spain
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), University of Murcia, 30003 Murcia, Spain; (C.A.G.-B.); (L.G.-M.)
| | - Carlos A. González-Bermúdez
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), University of Murcia, 30003 Murcia, Spain; (C.A.G.-B.); (L.G.-M.)
| | - Luis García-Marcos
- Biomedical Research Institute of Murcia (IMIB-Arrixaca), University of Murcia, 30003 Murcia, Spain; (C.A.G.-B.); (L.G.-M.)
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25
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Mooren FC, Krueger K, Ringseis R, Eder K, Liebisch G, Conrad K, Alack K, Hajizadeh Maleki B. Combined effects of moderate exercise and short-term fasting on markers of immune function in healthy human subjects. Am J Physiol Regul Integr Comp Physiol 2020; 318:R1103-R1115. [PMID: 32401626 DOI: 10.1152/ajpregu.00341.2019] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
This study aimed to investigate the effects of a short-term (36 h) fasting period combined with an acute bout of exercise on markers of immune function and inflammation in healthy human subjects. Fourteen moderately trained male subjects (aged 19-39 yr) participated in a 36-h fasting trial (FA-T), followed by an acute bout of moderate exercise (60% V̇o2max). After 1 wk, the same subjects, as their own control, participated in a nonfasting trial (NFA-T) in which they performed an exercise trial of the same duration and intensity. Blood samples were taken before, immediately after, and 1 h after each exercise bout and analyzed for several immunological and metabolic markers. At baseline, fasting subjects showed lower levels of T cell apoptosis, lymphocyte-proliferative responses, IL-6, monocyte chemoattractant protein-1 (MCP-1), insulin, and leptin (P < 0.05) as well as higher levels of neutrophil oxidative burst and thiobarbituric acid reactive substances (TBARS) than those in the NFA-T (P < 0.05). After the exercise protocol, fasted subjects revealed higher T cell apoptosis, neutrophil oxidative burst, TBARS, TNFα, and MCP-1 levels as well as lower levels of lymphocyte-proliferative response, IL-6, insulin, and leptin than those in the NFA-T (P < 0.05). Short-term fasting aggravates perturbations in markers of immune function, and inflammation was induced by an acute moderate-intensity exercise protocol.
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Affiliation(s)
- Frank C Mooren
- Witten/Herdecke University, Faculty of Health/School of Medicine, Witten, Germany
| | - Karsten Krueger
- Department of Exercise Physiology and Sports Therapy, Justus-Liebig-University, Giessen, Germany
| | - Robert Ringseis
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University, Giessen, Germany
| | - Klaus Eder
- Institute of Animal Nutrition and Nutrition Physiology, Justus-Liebig-University, Giessen, Germany
| | - Gerhard Liebisch
- Institute of Clinical Chemistry and Laboratory Medicine, University Hospital, Regensburg, Germany
| | - Kerstin Conrad
- Department of Exercise Physiology and Sports Therapy, Justus-Liebig-University, Giessen, Germany
| | - Katharina Alack
- Department of Exercise Physiology and Sports Therapy, Justus-Liebig-University, Giessen, Germany
| | - Behzad Hajizadeh Maleki
- Department of Exercise Physiology and Sports Therapy, Justus-Liebig-University, Giessen, Germany
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26
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Araújo LS, da Silva MV, da Silva CA, Borges MDF, Palhares HMDC, Rocha LP, Corrêa RRM, Rodrigues Júnior V, dos Reis MA, Machado JR. Analysis of serum inflammatory mediators in type 2 diabetic patients and their influence on renal function. PLoS One 2020; 15:e0229765. [PMID: 32130282 PMCID: PMC7055870 DOI: 10.1371/journal.pone.0229765] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/29/2019] [Accepted: 02/14/2020] [Indexed: 02/07/2023] Open
Abstract
Aim To evaluate the serum concentrations of inflammatory mediators in patients with type 2 diabetes mellitus (T2DM) with or without renal alteration (RA) function. Methods Serum samples from 76 patients with T2DM and 24 healthy individuals were selected. Patients with T2DM were divided into two groups according to eGFR (> or < 60mL/min/1.73m2). Cytokines, chemokines and adipokines levels were evaluated using the Multiplex immunoassay and ELISA. Results TNFR1 and leptin were higher in the T2DM group with RA than in the T2DM group without RA and control group. All patients with T2DM showed increased resistin, IL-8, and MIP-1α compared to the control group. Adiponectin were higher and IL-4 decreased in the T2DM group with RA compared to the control group. eGFR positively correlated with IL-4 and negatively with TNFR1, TNFR2, and leptin in patients with T2DM. In the T2DM group with RA, eGFR was negatively correlated with TNFR1 and resistin. TNFR1 was positively correlated with resistin and leptin, as well as resistin with IL-8 and leptin. Conclusion Increased levels of TNFR1, adipokines, chemokines and decrease of IL-4 play important role in the inflammatory process developed in T2DM and decreased renal function. We also suggest that TNFR1 is a strong predictor of renal dysfunction in patients with T2DM.
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Affiliation(s)
- Liliane Silvano Araújo
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Marcos Vinícius da Silva
- Department of Microbiology, Immunology and Parasitology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Crislaine Aparecida da Silva
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Maria de Fátima Borges
- Discipline of Endocrinology and Metabolism, Health Sciences Institute of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Heloísa Marcelina da Cunha Palhares
- Discipline of Endocrinology and Metabolism, Health Sciences Institute of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Laura Penna Rocha
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Rosana Rosa Miranda Corrêa
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Virmondes Rodrigues Júnior
- Department of Microbiology, Immunology and Parasitology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Marlene Antônia dos Reis
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
| | - Juliana Reis Machado
- Discipline of General Pathology, Institute of Biological and Natural Sciences of Federal University of Triângulo Mineiro, Uberaba, Minas Gerais, Brazil
- * E-mail:
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27
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Yıldız Gülhan P, Güleç Balbay E, Erçelik M, Yıldız Ş, Yılmaz MA. Is sarcoidosis related to metabolic syndrome and insulin resistance? Aging Male 2020; 23:53-58. [PMID: 31250684 DOI: 10.1080/13685538.2019.1631272] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/17/2022] Open
Abstract
Aim: To investigate the relationship between sarcoidosis and metabolic syndrome (MetS) and insulin resistance (IR).Method: In our study, 47 patients with sarcoidosis who applied to our outpatient clinic and 45 healthy individuals without chronic disease were included. All patients were evaluated for MetS according to the National Cholesterol Education Program's Adult Treatment Panel III (NCEP-ATP III) criteria. The presence of three of the five factors defined by ATP III for MetS was accepted as a diagnosis of MetS. IR is calculated using the HOMA-IR index.Results: The mean age of the 47 patients with sarcoidosis was 50.7 ± 12.2 years and the mean age of the 45 control groups was 42.9 ± 14.4 years. Almost 80% of the patients were diagnosed as stage 2 sarcoidosis. Distribution of the patients according to the use of steroid is; almost half of the patients (47%) received steroid previously or recently. Patients with sarcoidosis have a 7.66 relative risk for MetS, whereas they also have a 5.48 relative risk of insulin resistance development.Conclusion: This study shows that MetS is associated with increased sarcoidosis risk. MetS and IR diagnosis was higher in patients with sarcoidosis.
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Affiliation(s)
- Pinar Yıldız Gülhan
- Faculty of Medicine, Department of Chest Diseases, Düzce University, Düzce, Turkey
| | - Ege Güleç Balbay
- Faculty of Medicine, Department of Chest Diseases, Düzce University, Düzce, Turkey
| | - Merve Erçelik
- Faculty of Medicine, Department of Chest Diseases, Düzce University, Düzce, Turkey
| | - Şeyma Yıldız
- Faculty of Medicine, Department of Internal Medicine, Gazi University, Ankara, Turkey
| | - Mehmet Alper Yılmaz
- Department of Internal Medicine, Izmir Tepecik Education and Research Hospital, Izmir, Turkey
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28
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Serum adipokine levels in patients with sarcoidosis. Clin Rheumatol 2020; 39:2121-2125. [PMID: 32060810 DOI: 10.1007/s10067-020-04980-1] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2019] [Revised: 01/27/2020] [Accepted: 02/07/2020] [Indexed: 12/25/2022]
Abstract
BACKGROUND Sarcoidosis is a chronic inflammatory disease characterized by non-caseating granuloma which etiology is unknown yet. Adipokines are different proteins synthesized by adipose tissue that have an influence on angiogenesis, hemostasis, lipid metabolism, and immune system regulation. Adipokines may play a role in the pathogenesis of sarcoidosis. OBJECTIVES To evaluate the serum adipokine levels in patients with sarcoidosis and to determine a possible correlation with clinical and laboratory signs of disease. METHODS Forty-four biopsy-proven sarcoidosis patients followed at a single center and age- and sex-matched 41 healthy volunteers were included in the study. Demographic, clinical, laboratory, and radiological data were recorded and body mass index (BMI) was calculated in all patients. Routine laboratory tests (blood glucose, liver, and kidney function test) were measured. Serum adiponectin and leptin levels were measured by ELISA method. RESULTS Among 44sarcoidosis patients, 13 (29.5%) were male and 31 (70.5%) were female. Twenty-one (47.7%) patients had erythema nodosum, three (6.8%) had uveitis, 40 (90.9%) had arthralgia, 32 (72.7%) had arthritis, 15 (34.1%) had enthesitis. Laboratory evaluation showed increased serum ACE level in 24 (54.5%) patients, increased serum calcium level in 11 (25%) patients, increased serum D3 level in 5 (11.4%) patients, and increased ESR and CRP levels in 22 (50%) and 23 (52.3%) patients, respectively. Compared with the control group, serum adiponectin levels were significantly higher in patients with sarcoidosis(p = 0.007). Serum adiponectin level was associated with arthralgia and ankle joint swelling (p = 0.007, p = 0.006 respectively). Serum leptin levels were similar in sarcoidosis patients and controls (p = 0.327). There was no relationship between serum leptin level and disease features (p > 0.05). CONCLUSIONS In this study, high serum adiponectin level was detected in patients with sarcoidosis while serum leptin level was similar in the sarcoidosis and control group. Adiponectin, an anti-inflammatory protein, may play a role in the pathogenesis of sarcoidosis. Studies are needed to shed light on this topic.Key Points• Sarcoidosis is a chronic granulomatous disease characterized by granuloma formation• High serum adiponectin level was found in sarcoidosis patients• Serum adiponectin level was associated with some clinical features such as arthralgia and arthritis• High adiponectin levels in sarcoidosis patients may mitigate the inflammatory response, resulting in a mild form of the disease and/or spontaneous remission.
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29
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Kim DH, Park JW, Jeong HO, Lee B, Chung KW, Lee Y, Jung HJ, Hyun MK, Lee AK, Kim BM, Yu BP, Chung HY. Novel Role of Lck in Leptin-Induced Inflammation and Implications for Renal Aging. Aging Dis 2019; 10:1174-1186. [PMID: 31788330 PMCID: PMC6844581 DOI: 10.14336/ad.2019.0218] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2018] [Accepted: 01/18/2019] [Indexed: 12/25/2022] Open
Abstract
Aging is associated with increased fat mass and elevated serum leptin levels (hyperleptinemia), causing proinflammation in the kidneys where it plays a primary role in the removal of endogenous leptin from the circulation. Lymphocyte-specific kinase (Lck) is a positive regulator of inflammatory signaling and a potential treatment target for age-related diseases, but its role in leptin signaling is unknown. Here, we investigated how Lck influences hyperleptinemia-induced inflammation in kidney tissues from 6- and 21-month-old rats. Results indicate that Lck expression and activation increased significantly in aged rat kidneys, especially at renal tubules. Furthermore, we identified interactions between Lck and short leptin-receptor isoforms, suggesting that Lck is a protein tyrosine kinase regulating leptin signaling. We further investigated whether increased Lck expression in renal tubular epithelial cells and macrophage infiltration are associated with leptin-induced inflammation. We then demonstrated that leptin activates Lck and proinflammatory transcription factors (STAT3 and NF-κB), while Lck knockdown modulates the expression of both transcription factors. Collectively, these data implicate that Lck leads to development of leptin-induced renal inflammation during aging. Inhibition of this protein tyrosine kinase may therefore be an appropriate therapeutic option for protection against age-related hyperleptinemia.
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Affiliation(s)
- Dae Hyun Kim
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - June Whoun Park
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Hyoung Oh Jeong
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Bonggi Lee
- 2Korean Medicine (KM)-Application Center, Korea Institute of Oriental Medicine (KIOM), Daegu 41062, Korea
| | - Ki Wung Chung
- 3Department of Pharmacy, College of Pharmacy, Kyungsung University, Nam-gu, Busan 48434, Korea
| | - Yujeong Lee
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Hee Jin Jung
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Min Kyung Hyun
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - A Kyoung Lee
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Byeong Moo Kim
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
| | - Byung Pal Yu
- 4Department of Physiology, The University of Texas Health Science Center, San Antonio, TX 78229, USA
| | - Hae Young Chung
- 1Department of Pharmacy, College of Pharmacy, Pusan National University, Gumjung-gu, Busan 46241, Korea
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Maternal high-fat diet triggers metabolic syndrome disorders that are transferred to first and second offspring generations. Br J Nutr 2019; 123:59-71. [DOI: 10.1017/s0007114519002708] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
AbstractA high-fat (H) diet increases metabolic disorders in offspring. However, there is great variability in the literature regarding the time of exposure, composition of the H diets offered to the genitors and/or offspring and parameters evaluated. Here, we investigated the effect of a H diet subjected to the genitors on different cardio-metabolic parameters on first (F1)- and second (F2)-generation offspring. Female Fischer rats, during mating, gestation and breast-feeding, were subjected to the H diet (G0HF) or control (G0CF) diets. Part of F1 offspring becomes G1 genitors for generating the F2 offspring. After weaning, F1 and F2 rats consumed only the C diet. Nutritional, biometric, biochemical and haemodynamic parameters were evaluated. G0HF genitors had a reduction in food intake but energy intake was similar to the control group. Compared with the control group, the F1H and F2H offspring presented increased plasma leptin, insulin and fasting glucose levels, dietary intake, energy intake, adiposity index, mean arterial pressure, sympathetic drive evidenced by the hexamethonium and insulin resistance. Our data showed that only during mating, gestation and breast-feeding, maternal H diet induced cardio-metabolic disorders characteristic of human metabolic syndrome that were transferred to both females and males of F1 and F2 offspring, even if they were fed control diet after weaning. This process probably occurs due to the disturbance in mechanisms related to leptin that increases energy intake in F1H and F2H offspring. The present data reinforce the importance of balanced diet during pregnancy and breast-feeding for the health of the F1 and F2 offspring.
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Santamarina AB, Jamar G, Mennitti LV, Cesar HDC, Vasconcelos JR, Oyama LM, de Rosso VV, Pisani LP. Obesity-related inflammatory modulation by juçara berry (Euterpe edulis Mart.) supplementation in Brazilian adults: a double-blind randomized controlled trial. Eur J Nutr 2019; 59:1693-1705. [PMID: 31197507 DOI: 10.1007/s00394-019-02024-2] [Citation(s) in RCA: 20] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 06/05/2019] [Indexed: 02/07/2023]
Abstract
PURPOSE Obesity is an inflammatory-related disease, which recruits immune system cells triggering to imbalanced production of cytokines. Obesity management and treatment using foods bioactive compounds have gained clinical and scientific relevance. Juçara (Euterpe edulis Mart.) fruit is rich in fibers, unsaturated lipids and, anthocyanins showing potential health benefits. Thus, we investigated the effect of juçara pulp intake on inflammatory status of monocytes from obese individuals. METHODS It is a placebo-controlled, randomized double-blind trial. Twenty-seven obese participants (BMI between 30.0 and 39.9 kg/m2) of both genders from 31 to 59-year-old, divided into two groups: 5 g juçara freeze-dried pulp or 5 g of placebo for 6 weeks. Before and after supplementation, blood samples were collected and monocytes obtained and stimulated with lipopolysaccharides. After 24 h of incubation, the cells and supernatants were analyzed. RESULTS Post-treatment, juçara reduced TLR4, and IL-6 mRNA compared to placebo. Juçara also increased IL-10 mRNA in post-treatment. The protein expression of TLR4 pathway post-treatment, MYD88 expression reduced in juçara group compared to placebo. The juçara post-treatment reduced pIKKα/β compared to the placebo. Ob-R protein levels were higher in the juçara group post-treatment compared to pre-treatment. IL-6, TNF-α, and MCP-1 production by monocytes were reduced by juçara in post-treatment compared to pre-treatment levels. The supplementation increased IL-10 in juçara group with LPS compared to pre-treatment and versus juçara group without LPS. CONCLUSION These results demonstrated a proinflammatory state at the beginning, which was improved by juçara pulp consumption. Our results suggest juçara pulp as a potential tool against the proinflammatory status of obesity.
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Affiliation(s)
- Aline Boveto Santamarina
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, 11015-020, Brazil
| | - Giovana Jamar
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, 11015-020, Brazil
| | - Laís Vales Mennitti
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, 11015-020, Brazil
| | - Helena de Cássia Cesar
- Programa de Pós-Graduação Interdisciplinar em Ciências da Saúde, Universidade Federal de São Paulo, Santos, 11015-020, Brazil
| | - José Ronnie Vasconcelos
- Departamento de Biociências, Laboratório de Nutrição e Fisiologia Endócrina (LaNFE), Universidade Federal de São Paulo, Rua Silva Jardim, 136, Térreo, Vila Mathias, Santos, São Paulo, 11015-020, Brazil
| | - Lila Missae Oyama
- Departamento de Fisiologia, Universidade Federal de São Paulo, São Paulo, 04023-062, Brazil
| | - Veridiana Vera de Rosso
- Departamento de Biociências, Laboratório de Nutrição e Fisiologia Endócrina (LaNFE), Universidade Federal de São Paulo, Rua Silva Jardim, 136, Térreo, Vila Mathias, Santos, São Paulo, 11015-020, Brazil
| | - Luciana Pellegrini Pisani
- Departamento de Biociências, Laboratório de Nutrição e Fisiologia Endócrina (LaNFE), Universidade Federal de São Paulo, Rua Silva Jardim, 136, Térreo, Vila Mathias, Santos, São Paulo, 11015-020, Brazil.
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Li K, Li W, Jia Y, Liu J, Tan G, Zou J, Li X, Su Y, Lei S, Sun Q. Long-term immune effects of high-level natural radiation on Yangjiang inhabitants in China. Int J Radiat Biol 2019; 95:764-770. [PMID: 30753115 DOI: 10.1080/09553002.2019.1572250] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
Affiliation(s)
- Kun Li
- Department of Nuclear Medicine, Shandong Qianfoshan Hospital, Jinan, China
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Wen Li
- Department of Nuclear Medicine, Shandong Qianfoshan Hospital, Jinan, China
| | - Yanying Jia
- Department of Nuclear Medicine, Shandong Qianfoshan Hospital, Jinan, China
| | - Jianxiang Liu
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Guangxiang Tan
- Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China
| | - Jianming Zou
- Guangdong Prevention and Treatment Center for Occupational Diseases, Guangzhou, China
| | - Xiaoliang Li
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Yinping Su
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Shujie Lei
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
| | - Quanfu Sun
- Key Laboratory of Radiological Protection and Nuclear Emergency, China CDC, National Institute for Radiological Protection, Chinese Center for Disease Control and Prevention, Beijing, China
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Tu C, He J, Wu B, Wang W, Li Z. An extensive review regarding the adipokines in the pathogenesis and progression of osteoarthritis. Cytokine 2019; 113:1-12. [DOI: 10.1016/j.cyto.2018.06.019] [Citation(s) in RCA: 31] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/12/2018] [Accepted: 06/12/2018] [Indexed: 12/13/2022]
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Li N, Arbuckle TE, Muckle G, Lanphear BP, Boivin M, Chen A, Dodds L, Fraser WD, Ouellet E, Séguin JR, Velez MP, Yolton K, Braun JM. Associations of cord blood leptin and adiponectin with children's cognitive abilities. Psychoneuroendocrinology 2019; 99:257-264. [PMID: 30390444 PMCID: PMC6239208 DOI: 10.1016/j.psyneuen.2018.10.021] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/09/2018] [Revised: 10/22/2018] [Accepted: 10/23/2018] [Indexed: 12/11/2022]
Abstract
Background Adipocytokines may play a role in fetal programming of neurodevelopment. We aimed to investigate the associations between cord blood adipocytokine concentrations and children's intelligence test scores. Methods We used data from two ongoing pregnancy cohorts in North America: the Maternal-Infant Research on Environmental Chemicals (MIREC, n = 429) and Health Outcomes and Measures of the Environment (HOME, n = 183) Studies. Umbilical cord blood adipocytokine concentrations were measured using enzyme-linked immunosorbent assays. We assessed children's Intelligence Quotient (IQ) and its components using the Wechsler Preschool and Primary Scales of Intelligence-III or Wechsler Intelligence Scale for Children-IV. We used linear regression and linear mixed models to estimate associations between log2-transformed adipocytokine concentrations and children's IQ after adjusting for sociodemographic, perinatal, and child factors. Results After adjusting for covariates, cord blood adiponectin was positively associated with children's full-scale IQ scores at age 3 years in the MIREC Study (β = 1.4, 95% confidence interval [CI]: 0.2, 2.5) and at ages 5 and 8 years in the HOME Study (β = 1.7, CI: -0.1, 3.5). Adiponectin was positively associated with performance IQ in both studies (MIREC: β = 2.0, CI: 0.7, 3.3; HOME: β = 2.2, CI: 0.5, 3.9). Adiponectin was positively associated with working memory composite scores at age 8 in the HOME Study (β = 3.1, CI: 1.0, 5.2). Leptin was not associated with children's IQ in either study. Conclusions Cord blood adiponectin was associated with higher full-scale and performance IQ and working memory composite scores in children. Future studies are needed to explore the mechanisms underlying these associations.
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Affiliation(s)
- Nan Li
- Department of Epidemiology, Brown University, Providence, RI, United States.
| | - Tye E Arbuckle
- Population Studies Division, Healthy Environments and Consumer Safety Branch, Health Canada, Ottawa, Ontario, Canada
| | - Gina Muckle
- School of Psychology, Laval University, Ville de Québec, Québec, Canada
| | - Bruce P Lanphear
- Faculty of Health Sciences, Simon Fraser University, British Columbia, Canada; Child and Family Research Institute, BC Children's Hospital, Vancouver, British Columbia, Canada
| | - Michel Boivin
- School of Psychology, Laval University, Ville de Québec, Québec, Canada
| | - Aimin Chen
- Division of Epidemiology, Department of Environmental Health, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Linda Dodds
- Perinatal Epidemiology Research Unit, IWK Health Center, Halifax, Canada
| | - William D Fraser
- Centre Hospitalier Universitaire (CHU) Sainte-Justine Research Center, Mother and Child University Hospital Center, Montreal, Québec, Canada; Centre de recherche du CHUS (CHU de Sherbrooke), University of Sherbrooke, Sherbrooke, Québec, Canada
| | - Emmanuel Ouellet
- CHU de Québec-Université Laval Research Center, Ville de Québec, Québec, Canada
| | - Jean R Séguin
- Centre Hospitalier Universitaire (CHU) Sainte-Justine Research Center, Mother and Child University Hospital Center, Montreal, Québec, Canada; Department of Psychiatry, University of Montréal, Montréal, Québec, Canada
| | - Maria P Velez
- Department of Obstetrics and Gynecology, Queen's University, Kingston, Ontario, Canada
| | - Kimberly Yolton
- Department of Pediatrics, Division of General and Community Pediatrics, Cincinnati Children's Hospital Medical Center, University of Cincinnati College of Medicine, Cincinnati, OH, United States
| | - Joseph M Braun
- Department of Epidemiology, Brown University, Providence, RI, United States
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Abstract
OBJECTIVE We aimed to evaluate the relationship between circulating blood adipokine levels and systemic sclerosis (SSc). METHODS We conducted a meta-analysis on serum/plasma adiponectin, leptin, or resistin levels in patients with SSc and controls, and performed a subgroup analysis based on ethnicity and/or disease type. RESULTS Eleven studies (511 patients with SSc and 341 controls) were included in the meta-analysis. Meta-analysis revealed that adiponectin levels were significantly lower in patients with SSc than in controls (standardized mean differences [SMD] = -0.638; 95 % confidence intervals [CI] = -1.154, -0.122; P = 0.015). Stratification by ethnicity showed a low adiponectin level associated with SSc in Caucasians (SMD = -0.439; 95 % CI = -1.092, -0.213; P = 0.187) and Asians (SMD = -1.006; 95 % CI = -2.031, -0.019; P = 0.055), although this result was not statistically significant. Stratification by disease type revealed that the adiponectin level was significantly lower in the diffuse SSc, but not limited SSc, group than in the control (diffuse: SMD = -1.445; 95 % CI = -2.276, -0.614; P = 0.001; limited: SMD = 0.188; 95 % CI = -0.064, 0.439; P = 0.144). Meta-analysis showed no association between leptin levels and SSc (SMD = -0.029; 95 % CI = -1.362, 1.304; P = 0.966), and no association between resistin levels and SSc (SMD = 0.202; 95 % CI = -0.091, 0.496; P = 0.177). CONCLUSIONS Our meta-analysis revealed a significantly lower circulating adiponectin level in patients with SSc than in controls. This difference was apparent in the diffuse type of SSc, but not in the limited type. However, circulating leptin and resistin levels were not different between patients with SSc and healthy controls.
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Cao B, Chen Y, Brietzke E, Cha D, Shaukat A, Pan Z, Park C, Subramaniapillai M, Zuckerman H, Grant K, Mansur RB, McIntyre RS. Leptin and adiponectin levels in major depressive disorder: A systematic review and meta-analysis. J Affect Disord 2018; 238:101-110. [PMID: 29870819 DOI: 10.1016/j.jad.2018.05.008] [Citation(s) in RCA: 55] [Impact Index Per Article: 9.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/08/2018] [Revised: 04/24/2018] [Accepted: 05/13/2018] [Indexed: 12/15/2022]
Abstract
OBJECTIVES To explore differences in adipokine levels (i.e., leptin and adiponectin levels) between adults with Major Depressive Disorder (MDD) and healthy controls (HC), and to discuss the possible role of adipokine regulation in the development and progression of MDD. METHODS A systematic review and meta-analysis were conducted based on the preferred reporting items for systematic reviews and meta-analyses (PRISMA) guidelines. A systematic search was conducted for all English and Chinese peer-reviewed articles from inception to November 2017. A random effects model was used to calculate the standardized mean difference (SMD) of leptin and/or adiponectin levels in subjects diagnosed with MDD versus HC within a 95% confidence interval (CI). RESULTS Thirty-three studies were included in this meta-analysis. In total, 4,372 (52.3%) subjects with MDD and 3,984 (47.7%) HC were compared. We identified significant lower adiponectin levels in MDD compared to HC with a small effect size (ES) (SMD = -0.25; 95% CI: -0.48, -0.02; P < 0.001). However, no significant difference was observed in leptin levels between MDD subjects and HC (SMD = 0.13; 95% CI: -0.06, 0.31; P = 0.170). The heterogeneity in the results of our meta-analysis could not be completely explained by dividing subjects into subgroups. Results from subgroup analyses suggested that studies involving samples with BMI ≥ 25 had lower adiponectin levels in subjects with MDD compared to HC, and older age samples (i.e., age ≥ 40) with BMI ≥ 25 had both higher leptin levels and lower adiponectin levels in MDD subjects as compared to HC. LIMITATIONS The heterogeneity of included studies, small sample sizes, and potential publication bias were significant limitations. CONCLUSIONS The current systematic review and meta-analysis indicated that lower adiponectin levels may be associated with MDD. Moreover, the results suggest that males expressing lower adiponectin and leptin levels have an increased likelihood of developing MDD. Future studies should aim to investigate the manifestation of depressive phenotypes in older, obese populations with altered metabolic profiles resulting from adipokine dysregulation. The review has been registered with PROSPERO (registration number CRD42018082733).
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Affiliation(s)
- Bing Cao
- Department of Laboratorial Science and Technology, School of Public Health, Peking University, Beijing 100191, PR China; Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Yan Chen
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Elisa Brietzke
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada; Department of Psychiatry, Universidade Federal de São Paulo, São Paulo, Brazil
| | - Danielle Cha
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada; Faculty of Medicine, School of Medicine, University of Queensland, Brisbane, QLD, Australia
| | - Aisha Shaukat
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Zihang Pan
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Caroline Park
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | | | - Hannah Zuckerman
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Kiran Grant
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Rodrigo B Mansur
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada
| | - Roger S McIntyre
- Mood Disorders Psychopharmacology Unit, University Health Network, Toronto, Canada; Department of Psychiatry, University of Toronto, Toronto, Canada; Department of Pharmacology, University of Toronto, Toronto, Canada; Brain and Cognition Discovery Foundation, Toronto, ON, Canada.
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Suboptimal immune recovery during antiretroviral therapy with sustained HIV suppression in sub-Saharan Africa. AIDS 2018; 32:1043-1051. [PMID: 29547445 DOI: 10.1097/qad.0000000000001801] [Citation(s) in RCA: 41] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
OBJECTIVE To assess incidence, determinants and clinical consequences of suboptimal immune recovery in HIV-1 infected adults in sub-Saharan Africa with sustained viral suppression on antiretroviral therapy (ART). DESIGN Multicountry prospective cohort. METHODS Suboptimal immune recovery was defined as proportions of participants who failed to attain clinically relevant CD4+ cell count thresholds (>200, >350 and >500 cells/μl) despite sustained viral suppression on continuous first-line ART. Participants were censored at the earliest of death, loss to follow-up, last viral load less than 50 copies/ml, or database closure. Determinants of immune recovery were assessed using multivariable Cox regression. We estimated incidence rates of AIDS, pulmonary tuberculosis and all-cause mortality for CD4+ strata. RESULTS One thousand, five hundred and ninety-two participants were included; 60% were women, median age was 37 years (IQR 31-43) and median pre-ART CD4+ cell count was 147 cells/μl (IQR 76-215). After 6 years of ART, suboptimal immune recovery at CD4+ cell counts less than 200 cells/μl, less than 350 cells/μl, and less than 500 cells/μl occurred in 7, 27, and 57% of participants, respectively. Compared with participants with CD4+ cell count greater than 500 cells/μl, on-ART incidence rates were 12.5, 4.1, 0.9 times higher for AIDS and 16.9, 3.5, and 2.3 times higher for pulmonary tuberculosis in participants with CD4+ cell count less than 200, 200-349, and 350-499 cells/μl, respectively. All-cause mortality was highest in participants with CD4+ cell count less than 200 cells/μl, and comparable across the higher CD4+ strata. Older age, male sex, and lower pre-ART CD4+ cell count were strongly associated with suboptimal immune recovery. CONCLUSION These findings warrant close clinical and laboratory monitoring until adequate immune reconstitution is achieved and support early ART initiation before decline of CD4+ cell count.
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Murata T, Asanuma K, Ara N, Iijima K, Hatta W, Hamada S, Asano N, Koike T, Imatani A, Masamune A, Shimosegawa T. Leptin Aggravates Reflux Esophagitis by Increasing Tissue Levels of Macrophage Migration Inhibitory Factor in Rats. TOHOKU J EXP MED 2018; 245:45-53. [PMID: 29760351 DOI: 10.1620/tjem.245.45] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 07/23/2024]
Abstract
Leptin, produced primarily by the adipose tissue, acts as a pro-inflammatory modulator, thereby contributing to the development of obesity-related disease. Although high levels of leptin in the obese are closely related to gastroesophageal reflux disease, the mechanism by which leptin influences esophageal inflammation remains unknown. Macrophage migration inhibitory factor (MIF) is produced by immune cells, such as T lymphocytes and macrophages, and MIF is known to induce the production of tumor necrosis factor α (TNF-α), interleukin 1β (IL-1β) and interleukin 6 (IL-6). We therefore investigated the mechanism whereby leptin aggravates reflux esophagitis, by focusing on esophageal tissue levels of MIF and CD3+ T lymphocytes, both of which are crucial for the reflux-induced epithelial damage. Esophageal inflammation was surgically induced in male Wistar rats by ligating the forestomach and narrowing the duodenum to facilitate gastroesophageal reflux, followed by administration of leptin or vehicle with an osmotic pump system for 1 week. We demonstrated that the administration of leptin exacerbated the reflux esophagitis with the apparent infiltration of CD3+ T lymphocytes and caused the significant increase in the esophageal tissue levels of MIF. Moreover, the leptin caused increases in the esophageal tissue levels of TNF-α, IL-1β and IL-6, downstream targets of MIF. Importantly, the increases in these pro-inflammatory cytokines were accompanied by increased protein levels of phospho-STAT3 and phospho-AKT, pivotal molecules of leptin signaling pathways. In conclusion, through enhancing the MIF-induced inflammatory signaling, leptin could contribute to the development of gastroesophageal reflux disease.
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Affiliation(s)
- Tsugihiro Murata
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Kiyotaka Asanuma
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Nobuyuki Ara
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Katsunori Iijima
- Department of Gastroenterology and Neurology, Akita University Graduate School of Medicine
| | - Waku Hatta
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Shin Hamada
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Naoki Asano
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Tomoyuki Koike
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Akira Imatani
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Atsushi Masamune
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
| | - Tooru Shimosegawa
- Division of Gastroenterology, Tohoku University Graduate School of Medicine
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Abstract
BACKGROUND The pathogenesis of osteoarthritis (OA) is not clear; leptin may be related to its pathogenesis. METHODS We reviewed articles on leptin in OA, chondrocytes, and in vitro experiments. It is concluded that leptin may lead to OA via some signaling pathways. At the same time, the concentration of leptin in vitro experiments and OA/rheumatoid arthritis (RA) patients was summarized. RESULTS Leptin levels in serum and synovial fluid of OA/RA patients were higher than normal person. In the condition of infection and immunity, serum leptin levels in the peripheral blood significantly increase. Because of the close relationship between obesity, leptin, and OA, it is crucial to study the effects of weight loss and exercise intervention on serum leptin levels to improve the symptoms of OA patients. CONCLUSION Treatment for leptin-increased obesity may be a treatment for OA. The role of leptin in OA cannot be ignored and needs to be further studied.
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Affiliation(s)
- Moqi Yan
- Department of Orthopedics, The First Affiliated Hospital of Soochow University
- Orthopedic Institute, Soochow University, Suzhou, China
| | - Junxin Zhang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University
- Orthopedic Institute, Soochow University, Suzhou, China
| | - Huilin Yang
- Department of Orthopedics, The First Affiliated Hospital of Soochow University
- Orthopedic Institute, Soochow University, Suzhou, China
| | - Ye Sun
- Department of Orthopedics, The First Affiliated Hospital of Soochow University
- Orthopedic Institute, Soochow University, Suzhou, China
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Song NY, Lee YH, Na HK, Baek JH, Surh YJ. Leptin induces SIRT1 expression through activation of NF-E2-related factor 2: Implications for obesity-associated colon carcinogenesis. Biochem Pharmacol 2018; 153:282-291. [PMID: 29427626 DOI: 10.1016/j.bcp.2018.02.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2017] [Accepted: 02/02/2018] [Indexed: 12/26/2022]
Abstract
Leptin, a representative adipokine secreted from the white adipose tissue, is considered as a potential linker between obesity and cancer. SIRT1 is an NAD+-dependent histone/protein deacetylase speculated to function as an oncogene. In the present study, we found that leptin signaling-defective ob/ob and db/db mice had lower colonic expression of SIRT1 compared with leptin signaling-intact C57BL/6J mice, implying that leptin signaling is crucial for SIRT1 expression in vivo. Moreover, leptin induced up-regulation of SIRT1 in human colon cancer (HCT-116) cells. Leptin stimulated migration and invasion of cultured HCT-116 cells and tumor growth in the xenograft assay, and these effects were abrogated by a SIRT1 inhibitor sirtinol, suggesting that SIRT1 plays a role in leptin-induced colon carcinogenesis. Leptin-induced SIRT1 expression was regulated by the redox-sensitive transcription factor NF-E2-related factor 2 (Nrf2). Leptin stimulated nuclear accumulation of Nrf2 as well as its binding to the antioxidant response elements located in the SIRT1 promoter. Moreover, siRNA knockdown of Nrf2 abrogated the leptin-induced SIRT1 expression. Notably, SIRT1 was significantly reduced in colon tissues of Nrf2-null mice, lending further support to Nrf2-dependent SIRT1 expression. Expression of leptin, Nrf2 and SIRT1 was coordinately increased in human colon tumor tissues. In conclusion, leptin might play a role in colon carcinogenesis by inducing Nrf2-dependent SIRT1 overexpression.
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Affiliation(s)
- Na-Young Song
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, South Korea
| | - Yeon-Hwa Lee
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, South Korea
| | - Hye-Kyung Na
- Department of Food Science and Biotechnology, College of Knowledge-Based Services Engineering, Sungshin Women's University, Seoul 01133, South Korea
| | - Jeong-Heum Baek
- Division of Colon and Rectal Surgery, Department of Surgery, Gachon University Gil Medical Center, Incheon 21565, South Korea
| | - Young-Joon Surh
- Tumor Microenvironment Global Core Research Center, Seoul National University, Seoul 08826, South Korea; Research Institute of Pharmaceutical Sciences, Seoul National University, Seoul 08826, South Korea; Department of Molecular Medicine and Biopharmaceutical Sciences, Graduate School of Convergence Sciences and Technology, Seoul National University, Seoul 08826, South Korea; Cancer Research Institute, Seoul National University, Seoul 08826, South Korea.
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Lee YH, Song GG. Association of circulating resistin, leptin, adiponectin and visfatin levels with Behçet disease: a meta-analysis. Clin Exp Dermatol 2018; 43:536-545. [PMID: 29356069 DOI: 10.1111/ced.13383] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 06/30/2017] [Indexed: 12/27/2022]
Abstract
BACKGROUND Behçet disease (BD) is a chronic inflammatory disease. Adipokines are synthesized in adipose tissue, and have been reported to play important roles in the pathogenesis of autoimmune and inflammatory diseases, including BD. AIM To evaluate the relationship between circulating blood adipokine levels and BD. METHODS We conducted a meta-analysis of papers reporting on serum/plasma resistin, leptin, adiponectin and visfatin levels in patients with BD and in healthy controls (HCs). We identified 82 relevant studies using electronic and manual search methods, and selected 16 studies for full-text review based on the title and abstract. Two of these were later excluded (one was a review, one had no data), leaving 14 articles that met the inclusion criteria for this meta-analysis. RESULTS The 14 included studies assessed 637 patients with BD and 520 HCs. Compared with the HCs, the BD group had significantly higher levels of leptin [standardized mean difference (SMD) = 0.68, 95% CI 0.15-1.21, P = 0.01]. Levels of resistin (SMD = 0.51, 95% CI 0.92-0.918, P = 0.02) and adiponectin (SMD = 0.31, 95% CI 0.06-0.56, P = 0.02) were significantly higher in the BD group after adjustment for age, sex and body mass index (BMI), but not without such adjustment (resistin: (SMD = 0.38, 95% CI -0.18 to 0.93, P = 0.19; adiponectin: SMD = -0.59, 95% CI -2.23 to 1.06, P = 0.48). A significantly lower visfatin level was found in the BD group with adjustment (SMD = -1.70, 95% CI -2.14 to -1.25, P < 0.001) but not without adjustment (SMD = 0.31, 95% CI -0.21 to 0.82, P = 0.24). CONCLUSIONS Our meta-analysis revealed significantly higher circulating resistin, leptin and adiponectin levels and lower visfatin levels in patients with BD than in HCs, indicating that adipokines probably play an important role in BD pathogenesis.
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Affiliation(s)
- Y H Lee
- Division of Rheumatology, Department of Internal Medicine, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
| | - G G Song
- Division of Rheumatology, Department of Internal Medicine, Korea University Medical Center, Korea University College of Medicine, Seoul, Korea
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Azim S, Nicholson J, Rebecchi MJ, Galbavy W, Feng T, Rizwan S, Reinsel RA, Kaczocha M, Benveniste H. Interleukin-6 and leptin levels are associated with preoperative pain severity in patients with osteoarthritis but not with acute pain after total knee arthroplasty. Knee 2018; 25:25-33. [PMID: 29325836 DOI: 10.1016/j.knee.2017.12.001] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/05/2017] [Revised: 11/27/2017] [Accepted: 12/02/2017] [Indexed: 02/02/2023]
Abstract
BACKGROUND Identifying drivers of pain that can serve as novel drug targets is important for improving perioperative analgesia. Total knee arthroplasty (TKA) is associated with significant postoperative pain. Cytokines contribute to the pathophysiology of osteoarthritis (OA) and associated pain. However, the influence of perioperative cytokine levels after TKA surgery upon postoperative pain remains unexplored. METHODS We designed a prospective observational study to profile three proinflammatory cytokines, interleukin-6 (IL-6), tumor necrosis factor α (TNFα), and leptin in serum, synovial, and cerebrospinal fluid of TKA patients perioperatively to determine associations between cytokine levels and pain. We characterized time-trajectories in cytokines pre- and post-surgery and explored their relationships to pain across gender. RESULTS Preoperative pain, measured by functional pain disability scores (PDQ), was predictive of postoperative pain. There were no gender differences in severity of preoperative pain or acute postoperative pain. Serum IL-6, serum leptin, and synovial fluid leptin were positively correlated with body mass index and preoperative pain severity. Stratification of patients by gender revealed strong correlations between serum IL-6, leptin, and PDQ only in females, suggesting that females may be more sensitive to the nociceptive actions of these cytokines. Although serum IL-6 increased dramatically (and TNFα increased modestly) four hours after surgery and remained elevated at 72h; they were not associated with the severity of acute postoperative pain. CONCLUSIONS Our data suggest that while preoperative chronic pain is predictive of the severity of acute postoperative pain in TKA patients, the pre- and post-operative inflammatory status does not predict postoperative pain.
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Affiliation(s)
- Syed Azim
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States.
| | - James Nicholson
- Department of Orthopaedics, Stony Brook University, Stony Brook, NY, United States
| | - Mario J Rebecchi
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States
| | - William Galbavy
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States
| | - Tian Feng
- Department of Applied Mathematics and Statistics, Stony Brook University, Stony Brook, NY, United States
| | - Sabeen Rizwan
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States
| | - Ruth A Reinsel
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States
| | - Martin Kaczocha
- Department of Anesthesiology, Stony Brook University, Stony Brook, NY, United States.
| | - Helene Benveniste
- Department of Anesthesiology, Yale University, New Haven, United States.
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Morel S, Kwak B, Rohner-Jeanrenaud F, Steffens S, Molica F. Adipokines at the crossroad between obesity and cardiovascular disease. Thromb Haemost 2017; 113:553-66. [DOI: 10.1160/th14-06-0513] [Citation(s) in RCA: 90] [Impact Index Per Article: 12.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/13/2014] [Accepted: 09/18/2014] [Indexed: 12/31/2022]
Abstract
SummaryObesity, and especially excessive visceral adipose tissue accumulation, is considered as a low-grade inflammatory state that is responsible for adipocyte dysfunction and associated metabolic disorders. Adipose tissue displays endocrine functions by releasing pro- or antiinflammatory bioactive molecules named adipokines. An altered expression of these molecules, provoked by obesity or adipocyte dysregulation, contributes to major metabolic diseases such as insulin resistance and type 2 diabetes mellitus that are important risk factors for cardiovascular disease. However, obesity is also characterised by the expansion of perivascular adipose tissue that acts locally via diffusion of adipokines into the vascular wall. Local inflammation within blood vessels induced by adipokines contributes to the onset of endothelial dysfunction, atherosclerosis and thrombosis, but also to vascular remodelling and hypertension. A fast expansion of obesity is expected in the near future, which will rapidly increase the incidence of these cardiovascular diseases. The focus of this review is to summarise the link between metabolic and cardiovascular disease and discuss current treatment approaches, limitations and future perspectives for more targeted therapies.
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Kahraman R, Calhan T, Sahin A, Ozdil K, Caliskan Z, Bireller ES, Cakmakoglu B. Are adipocytokines inflammatory or metabolic mediators in patients with inflammatory bowel disease? Ther Clin Risk Manag 2017; 13:1295-1301. [PMID: 29033577 PMCID: PMC5628835 DOI: 10.2147/tcrm.s140618] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
This study examined the adiponectin and leptin levels and insulin resistance (IR) in patients with inflammatory bowel disease (IBD) and the associations between these factors and IBD characteristics. Fasting serum leptin, adiponectin, glucose, and insulin levels, as well as inflammatory parameters, were measured in 105 patients with IBD (49 patients with Crohn’s disease [CD], 56 patients with ulcerative colitis [UC]) and 98 healthy controls [HC]. IR was evaluated using the Homeostatic Model Assessment of Insulin Resistance (HOMA-IR). Disease activity and severity in patients with UC were evaluated using the Truelove–Witts index, and patients with CD were evaluated using the Crohn’s Disease Activity Index. Serum adiponectin levels were found to be significantly lower in patients with CD and UC (p<0.001). Serum leptin levels were also found to be significantly higher in both the UC and CD groups (p<0.001). When HOMA-IR levels were compared, no significant difference was detected for either the CD or UC groups compared with the controls. In conclusion, it was shown that leptin levels increased and adiponectin levels decreased in patients with IBD, which is thought to be related to chronic inflammation. The effects of adipocytokines in patients with IBD with inflammatory and metabolic processes need to be investigated in further broader studies.
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Affiliation(s)
- Resul Kahraman
- Department of Gastroenterology, Umraniye Education and Training Hospital, Health Sciences University
| | - Turan Calhan
- Department of Gastroenterology, Umraniye Education and Training Hospital, Health Sciences University
| | - Abdurrahman Sahin
- Department of Gastroenterology, Umraniye Education and Training Hospital, Health Sciences University
| | - Kamil Ozdil
- Department of Gastroenterology, Umraniye Education and Training Hospital, Health Sciences University
| | - Zuhal Caliskan
- Department of Gastroenterology, Umraniye Education and Training Hospital, Health Sciences University
| | - Elif Sinem Bireller
- Department of Pharmaceutical Microbiology, Faculty of Pharmacy, Istanbul Yeni Yuzyil University
| | - Bedia Cakmakoglu
- Department of Molecular Medicine, Aziz Sancar Institute of Experimental Medicine, Istanbul University, Istanbul, Turkey
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45
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van den Broek T, Madi A, Delemarre EM, Schadenberg AWL, Tesselaar K, Borghans JAM, Nierkens S, Redegeld FA, Otten HG, Rossetti M, Albani S, Sorek R, Cohen IR, Jansen NJG, van Wijk F. Human neonatal thymectomy induces altered B-cell responses and autoreactivity. Eur J Immunol 2017; 47:1970-1981. [PMID: 28691750 PMCID: PMC5697610 DOI: 10.1002/eji.201746971] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2017] [Revised: 06/06/2017] [Accepted: 06/07/2017] [Indexed: 01/19/2023]
Abstract
An association between T‐cell lymphopenia and autoimmunity has long been proposed, but it remains to be elucidated whether T‐cell lymphopenia affects B‐cell responses to autoantigens. Human neonatal thymectomy (Tx) results in a decrease in T‐cell numbers and we used this model to study the development of autoreactivity. Two cohorts of neonatally thymectomized individuals were examined, a cohort of young (1–5 years post‐Tx, n = 10–27) and older children (>10 years, n = 26), and compared to healthy age‐matched controls. T‐cell and B‐cell subsets were assessed and autoantibody profiling performed. Early post‐Tx, a decrease in T‐cell numbers (2.75 × 109/L vs. 0.71 × 109/L) and an increased proportion of memory T cells (19.72 vs. 57.43%) were observed. The presence of autoantibodies was correlated with an increased proportion of memory T cells in thymectomized children. No differences were seen in percentages of different B‐cell subsets between the groups. The autoantigen microarray showed a skewed autoantibody response after Tx. In the cohort of older individuals, autoantibodies were present in 62% of the thymectomized children, while they were found in only 33% of the healthy controls. Overall, our data suggest that neonatal Tx skews the autoantibody profile. Preferential expansion and preservation of Treg (regulatory T) cell stability and function, may contribute to preventing autoimmune disease development after Tx.
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Affiliation(s)
- Theo van den Broek
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - Asaf Madi
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Eveline M Delemarre
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - Alvin W L Schadenberg
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands.,Department of Pediatric Intensive Care, Bristol Royal Hospital for Children, Bristol, UK
| | - Kiki Tesselaar
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - José A M Borghans
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - Stefan Nierkens
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - Frank A Redegeld
- Utrecht Institute for Pharmaceutical Sciences, Utrecht University, Utrecht, The Netherlands
| | - Henny G Otten
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
| | - Maura Rossetti
- Duke-National University of Singapore Graduate Medical School, Singapore.,SingHealth Translational Immunology and Inflammation Centre, SingHealth, Singapore
| | - Salvatore Albani
- Duke-National University of Singapore Graduate Medical School, Singapore.,SingHealth Translational Immunology and Inflammation Centre, SingHealth, Singapore
| | | | - Irun R Cohen
- Department of Immunology, The Weizmann Institute of Science, Rehovot, Israel
| | - Nicolaas J G Jansen
- Department of Pediatric Intensive Care, University Medical Centre Utrecht, Utrecht, The Netherlands.,Department of Pediatric Cardiothoracic Surgery, University Medical Centre Utrecht, Utrecht, The Netherlands
| | - Femke van Wijk
- Laboratory of Translational Immunology, University Medical Center Utrecht/Wilhelmina Children's Hospital, Utrecht, The Netherlands
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Lee YH, Song GG. Association between circulating leptin levels and systemic lupus erythematosus: an updated meta-analysis. Lupus 2017; 27:428-435. [PMID: 28795654 DOI: 10.1177/0961203317725587] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
Objective We aimed to evaluate the relationship between circulating leptin levels and systemic lupus erythematosus (SLE). Methods MEDLINE, EMBASE, and Cochrane library databases were searched. Meta-analyses were performed comparing serum/plasma leptin levels in patients with SLE and healthy controls, and on patients with SLE in subgroups based on ethnicity, sample size, data type, and matched variables (age, sex, and/or body mass index (BMI)). Results Eighteen studies including 1333 patients with SLE and 1048 controls were ultimately selected, which showed that leptin levels were significantly higher in the SLE group than in the control group (SMD = 0.611, 95% CI = 0.275-0.947, p < 0.001). When we excluded two outlier studies because of high heterogeneity, leptin levels were also significantly higher in the SLE group than in the control group (SMD = 0.619, 95% CI = 0.431-0.807, p < 0.001). Stratification by ethnicity showed significantly elevated leptin levels in the SLE group in European, Asian, Arab, Latin American, and mixed populations. Subgroup analysis by sample size showed significantly higher leptin levels in the SLE group by small ( n ≤ 100) and large sample numbers ( n > 100) (SMD = 0.780, 95% CI = 0.445-1.115, p < 0.001; SMD = 0.495, 95% CI = 0.275-0.715, p < 0.001). Stratification by data type revealed significantly higher leptin levels in the original data and imputed data groups. Subgroup analysis adjustment revealed significantly higher leptin levels in the SLE group, regardless of adjustment for variables. Conclusions Our meta-analysis demonstrated that leptin levels were significantly higher in patients with SLE, regardless of ethnicity, sample size, data type, and matched variables.
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Affiliation(s)
- Y H Lee
- Division of Rheumatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
| | - G G Song
- Division of Rheumatology, Department of Internal Medicine, Korea University College of Medicine, Seoul, Korea
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Das UN. Is There a Role for Bioactive Lipids in the Pathobiology of Diabetes Mellitus? Front Endocrinol (Lausanne) 2017; 8:182. [PMID: 28824543 PMCID: PMC5539435 DOI: 10.3389/fendo.2017.00182] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/17/2017] [Accepted: 07/10/2017] [Indexed: 12/12/2022] Open
Abstract
Inflammation, decreased levels of circulating endothelial nitric oxide (eNO) and brain-derived neurotrophic factor (BDNF), altered activity of hypothalamic neurotransmitters (including serotonin and vagal tone) and gut hormones, increased concentrations of free radicals, and imbalance in the levels of bioactive lipids and their pro- and anti-inflammatory metabolites have been suggested to play a role in diabetes mellitus (DM). Type 1 diabetes mellitus (type 1 DM) is due to autoimmune destruction of pancreatic β cells because of enhanced production of IL-6 and tumor necrosis factor-α (TNF-α) and other pro-inflammatory cytokines released by immunocytes infiltrating the pancreas in response to unknown exogenous and endogenous toxin(s). On the other hand, type 2 DM is due to increased peripheral insulin resistance secondary to enhanced production of IL-6 and TNF-α in response to high-fat and/or calorie-rich diet (rich in saturated and trans fats). Type 2 DM is also associated with significant alterations in the production and action of hypothalamic neurotransmitters, eNO, BDNF, free radicals, gut hormones, and vagus nerve activity. Thus, type 1 DM is because of excess production of pro-inflammatory cytokines close to β cells, whereas type 2 DM is due to excess of pro-inflammatory cytokines in the systemic circulation. Hence, methods designed to suppress excess production of pro-inflammatory cytokines may form a new approach to prevent both type 1 and type 2 DM. Roux-en-Y gastric bypass and similar surgeries ameliorate type 2 DM, partly by restoring to normal: gut hormones, hypothalamic neurotransmitters, eNO, vagal activity, gut microbiota, bioactive lipids, BDNF production in the gut and hypothalamus, concentrations of cytokines and free radicals that results in resetting glucose-stimulated insulin production by pancreatic β cells. Our recent studies suggested that bioactive lipids, such as arachidonic acid, eicosapentaneoic acid, and docosahexaenoic acid (which are unsaturated fatty acids) and their anti-inflammatory metabolites: lipoxin A4, resolvins, protectins, and maresins, may have antidiabetic actions. These bioactive lipids have anti-inflammatory actions, enhance eNO, BDNF production, restore hypothalamic dysfunction, enhance vagal tone, modulate production and action of ghrelin, leptin and adiponectin, and influence gut microbiota that may explain their antidiabetic action. These pieces of evidence suggest that methods designed to selectively deliver bioactive lipids to pancreatic β cells, gut, liver, and muscle may prevent type 1 and type 2 DM.
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Affiliation(s)
- Undurti N. Das
- BioScience Research Centre, Department of Medicine, Gayatri Vidya Parishad Hospital, GVP College of Engineering Campus, Visakhapatnam, India
- UND Life Sciences, Battle Ground, WA, United States
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Neutrophil and Monocyte Bactericidal Responses to 10 Weeks of Low-Volume High-Intensity Interval or Moderate-Intensity Continuous Training in Sedentary Adults. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:8148742. [PMID: 28656073 PMCID: PMC5471589 DOI: 10.1155/2017/8148742] [Citation(s) in RCA: 41] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/20/2017] [Accepted: 05/09/2017] [Indexed: 12/22/2022]
Abstract
Neutrophils and monocytes are key components of the innate immune system that undergo age-associated declines in function. This study compared the impact of high-intensity interval training (HIIT) and moderate-intensity continuous training (MICT) on immune function in sedentary adults. Twenty-seven (43 ± 11 years) healthy sedentary adults were randomized into ten weeks of either a HIIT (>90% maximum heart rate) or MICT (70% maximum heart rate) group training program. Aerobic capacity (VO2peak), neutrophil and monocyte bacterial phagocytosis and oxidative burst, cell surface receptor expression, and systemic inflammation were measured before and after the training. Total exercise time commitment was 57% less for HIIT compared to that for MICT while both significantly improved VO2peak similarly. Neutrophil phagocytosis and oxidative burst and monocyte phagocytosis and percentage of monocytes producing an oxidative burst were improved by training similarly in both groups. Expression of monocyte but not neutrophil CD16, TLR2, and TLR4 was reduced by training similarly in both groups. No differences in systemic inflammation were observed for training; however, leptin was reduced in the MICT group only. With similar immune-enhancing effects for HIIT compared to those for MICT at 50% of the time commitment, our results support HIIT as a time efficient exercise option to improve neutrophil and monocyte function.
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Hrycek E, Banasiewicz‐Szkróbka I, Żurakowski A, Buszman P, Hrycek A. Accelerated Atherosclerosis in Patients with Systemic Lupus Erythematosus and the Role of Selected Adipocytokines in This Process. Lupus 2017. [DOI: 10.5772/68016] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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50
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Lee YH, Bae SC. Circulating leptin level in rheumatoid arthritis and its correlation with disease activity: a meta-analysis. Z Rheumatol 2017; 75:1021-1027. [PMID: 26820722 DOI: 10.1007/s00393-016-0050-1] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
OBJECTIVE This study aimed to evaluate the relationship between the circulating serum leptin level and rheumatoid arthritis (RA) and to establish a correlation between serum leptin levels and RA activity. METHODS We searched the PUBMED, EMBASE, and Cochrane databases. A meta-analysis was performed, comparing the serum/plasma leptin levels in patients with RA and healthy controls. Correlation coefficients between serum leptin level and either disease activity score 28 (DAS28) or C‑reactive protein (CRP) in RA patients were also examined. RESULTS Thirteen studies with a total of 648 RA patients and 426 controls were included in this meta-analysis. Circulating leptin level was significantly higher in the RA group than in the control group (SMD = 1.056, 95 % CI = 0.647-1.465, p = 4.2 × 10-7). In addition, stratification by ethnicity showed a significantly elevated leptin level in the RA group in Caucasian, Turkish, and Arab populations (SMD = 0.813, 95 % CI = 0.137-1.490, p = 0.018, SMD = 0.981, 95 % CI = 0.307-1.655, p = 0.004, and SMD = 1.469, 95 % CI = 0.443-2.495, p = 0.005 respectively). A meta-analysis of correlation coefficients showed a small but significantly positive correlation between the circulating leptin level and either DAS28 (correlation coefficient = 0.275, 95 % CI = 0.076-0.452, p = 0.007) or CRP (correlation coefficient = 0.274, 95 % CI = 0.068-0.458, p = 0.010). CONCLUSIONS Our meta-analysis demonstrated that the circulating leptin level is significantly higher in patients with RA and that a small but significantly positive correlation exists between leptin levels and RA activity.
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Affiliation(s)
- Y H Lee
- Division of Rheumatology, Department of Internal Medicine, Korea University Anam Hospital, Korea University College of Medicine, 73, Inchon-ro, Seongbuk-gu, 136-705, Seoul, Korea.
| | - S-C Bae
- Department of Rheumatology, Hanyang University Hospital for Rheumatic Diseases, Seoul, Korea
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