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Thakur P, Baraskar K, Shrivastava VK, Medhi B. Cross-talk between adipose tissue and microbiota-gut-brain-axis in brain development and neurological disorder. Brain Res 2024; 1844:149176. [PMID: 39182900 DOI: 10.1016/j.brainres.2024.149176] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/12/2024] [Revised: 07/25/2024] [Accepted: 08/18/2024] [Indexed: 08/27/2024]
Abstract
The gut microbiota is an important factor responsible for the physiological processes as well as pathogenesis of host. The communication between central nervous system (CNS) and microbiota occurs by different pathways i.e., chemical, neural, immune, and endocrine. Alteration in gut microbiota i.e., gut dysbiosis causes alteration in the bidirectional communication between CNS and gut microbiota and linked to the pathogenesis of neurological and neurodevelopmental disorder. Therefore, now-a-days microbiota-gut-brain-axis (MGBA) has emerged as therapeutic target for the treatment of metabolic disorder. But, experimental data available on MGBA from basic research has limited application in clinical study. In present study we first summarized molecular mechanism of microbiota interaction with brain physiology and pathogenesis via collecting data from different sources i.e., PubMed, Scopus, Web of Science. Furthermore, evidence shows that adipose tissue (AT) is active during metabolic activities and may also interact with MGBA. Hence, in present study we have focused on the relationship among MGBA, brown adipose tissue, and white adipose tissue. Along with this, we have also studied functional specificity of AT, and understanding heterogeneity among MGBA and different types of AT. Therefore, molecular interaction among them may provide therapeutic target for the treatment of neurological disorder.
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Affiliation(s)
- Pratibha Thakur
- Endocrinology Unit, Bioscience Department, Barkatullah University, Bhopal, Madhya Pradesh 462026, India.
| | - Kirti Baraskar
- Endocrinology Unit, Bioscience Department, Barkatullah University, Bhopal, Madhya Pradesh 462026, India
| | - Vinoy K Shrivastava
- Endocrinology Unit, Bioscience Department, Barkatullah University, Bhopal, Madhya Pradesh 462026, India
| | - Bikash Medhi
- Department of Pharmacology, Post Graduate Institute of Medical Education and Research, Chandigarh, Punjab 160012, India.
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Chen V, Zhang J, Chang J, Beg MA, Vick L, Wang D, Gupta A, Wang Y, Zhang Z, Dai W, Kim M, Song S, Pereira D, Zheng Z, Sodhi K, Shapiro JI, Silverstein RL, Malarkannan S, Chen Y. CD36 restricts lipid-associated macrophages accumulation in white adipose tissues during atherogenesis. Front Cardiovasc Med 2024; 11:1436865. [PMID: 39156133 PMCID: PMC11327822 DOI: 10.3389/fcvm.2024.1436865] [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: 05/22/2024] [Accepted: 07/01/2024] [Indexed: 08/20/2024] Open
Abstract
Visceral white adipose tissues (WAT) regulate systemic lipid metabolism and inflammation. Dysfunctional WAT drive chronic inflammation and facilitate atherosclerosis. Adipose tissue-associated macrophages (ATM) are the predominant immune cells in WAT, but their heterogeneity and phenotypes are poorly defined during atherogenesis. The scavenger receptor CD36 mediates ATM crosstalk with other adipose tissue cells, driving chronic inflammation. Here, we combined the single-cell RNA sequencing technique with cell metabolic and functional assays on major WAT ATM subpopulations using a diet-induced atherosclerosis mouse model (Apoe-null). We also examined the role of CD36 using Apoe/Cd36 double-null mice. Based on transcriptomics data and differential gene expression analysis, we identified a previously undefined group of ATM displaying low viability and high lipid metabolism and labeled them as "unhealthy macrophages". Their phenotypes suggest a subpopulation of ATM under lipid stress. We also identified lipid-associated macrophages (LAM), which were previously described in obesity. Interestingly, LAM increased 8.4-fold in Apoe/Cd36 double-null mice on an atherogenic diet, but not in Apoe-null mice. The increase in LAM was accompanied by more ATM lipid uptake, reduced adipocyte hypertrophy, and less inflammation. In conclusion, CD36 mediates a delicate balance between lipid metabolism and inflammation in visceral adipose tissues. Under atherogenic conditions, CD36 deficiency reduces inflammation and increases lipid metabolism in WAT by promoting LAM accumulation.
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Affiliation(s)
- Vaya Chen
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Jue Zhang
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Jackie Chang
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Mirza Ahmar Beg
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Lance Vick
- Department of Biochemistry, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Dandan Wang
- Versiti Blood Research Institute, Milwaukee, WI, United States
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Ankan Gupta
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Yaxin Wang
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Ziyu Zhang
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Wen Dai
- Versiti Blood Research Institute, Milwaukee, WI, United States
| | - Mindy Kim
- Versiti Blood Research Institute, Milwaukee, WI, United States
- Department of Physiology, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Shan Song
- Department of Pathology, Hebei Medical University, Shijiazhuang, China
- Hebei Key Laboratory of Kidney Diseases, Shijiazhuang, China
| | - Duane Pereira
- Department of Surgery, Biomedical Sciences, and Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
| | - Ze Zheng
- Versiti Blood Research Institute, Milwaukee, WI, United States
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Komal Sodhi
- Department of Surgery, Biomedical Sciences, and Medicine, Joan C. Edwards School of Medicine, Marshall University, Huntington, WV, United States
| | - Joseph I. Shapiro
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Roy L. Silverstein
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Subramaniam Malarkannan
- Versiti Blood Research Institute, Milwaukee, WI, United States
- Department of Microbiology and Immunology, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Pediatrics, Medical College of Wisconsin, Milwaukee, WI, United States
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
| | - Yiliang Chen
- Versiti Blood Research Institute, Milwaukee, WI, United States
- Department of Medicine, Medical College of Wisconsin, Milwaukee, WI, United States
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Zhou Y, Huang J, Mai W, Kuang W, Li X, Shi D, Yang Y, Wu J, Wu Z, Liao Y, Zhou Z, Qiu Z. The novel vaccines targeting interleukin-1 receptor type I. Int Immunopharmacol 2024; 132:111941. [PMID: 38554439 DOI: 10.1016/j.intimp.2024.111941] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/07/2024] [Revised: 03/18/2024] [Accepted: 03/25/2024] [Indexed: 04/01/2024]
Abstract
OBJECTIVE There is mounting evidence indicating that atherosclerosis represents a persistent inflammatory process, characterized by the presence of inflammation at various stages of the disease. Interleukin-1 (IL-1) precisely triggers inflammatory signaling pathways by binding to interleukin-1 receptor type I (IL-1R1). Inhibition of this signaling pathway contributes to the prevention of atherosclerosis and myocardial infarction. The objective of this research is to develop therapeutic vaccines targeting IL-1R1 as a preventive measure against atherosclerosis and myocardial infarction. METHODS ILRQβ-007 and ILRQβ-008 vaccines were screened, prepared and then used to immunize high-fat-diet fed ApoE-/- mice and C57BL/6J mice following myocardial infarction. Progression of atherosclerosis in ApoE-/- mice was assessed primarily by oil-red staining of the entire aorta and aortic root, as well as by detecting the extent of macrophage infiltration. The post-infarction cardiac function in C57BL/6J mice were evaluated using cardiac ultrasound and histological staining. RESULTS ILRQβ-007 and ILRQβ-008 vaccines stimulated animals to produce high titers of antibodies that effectively inhibited the binding of interleukin-1β and interleukin-1α to IL-1R1. Both vaccines effectively reduced atherosclerotic plaque area, promoted plaque stabilization, decreased macrophage infiltration in plaques and influenced macrophage polarization, as well as decreasing levels of inflammatory factors in the aorta, serum, and ependymal fat in ApoE-/- mice. Furthermore, these vaccines dramatically improved cardiac function and macrophage infiltration in C57BL/6J mice following myocardial infarction. Notably, no significant immune-mediated damage was observed in immunized animals. CONCLUSION The vaccines targeting the IL-1R1 would be a novel and promising treatment for the atherosclerosis and myocardial infarction.
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Affiliation(s)
- Yanzhao Zhou
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jianwu Huang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wuqian Mai
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Wenlong Kuang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Xin Li
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Dingyang Shi
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yulu Yang
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Jiacheng Wu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zhijie Wu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Yuhua Liao
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China
| | - Zihua Zhou
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
| | - Zhihua Qiu
- Department of Cardiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Key Laboratory of Biological Targeted Therapy, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China; Hubei Engineering Research Center for Immunological Diagnosis and Therapy of Cardiovascular Diseases, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, China.
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Kiernan K, Nichols AG, Alwarawrah Y, MacIver NJ. Effects of T cell leptin signaling on systemic glucose tolerance and T cell responses in obesity. PLoS One 2023; 18:e0286470. [PMID: 37276236 PMCID: PMC10241364 DOI: 10.1371/journal.pone.0286470] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/16/2023] [Indexed: 06/07/2023] Open
Abstract
BACKGROUND/OBJECTIVES Leptin is an adipokine secreted in proportion to adipocyte mass and is therefore increased in obesity. Leptin signaling has been shown to directly promote inflammatory T helper 1 (Th1) and T helper 17 (Th17) cell number and function. Since T cells have a critical role in driving inflammation and systemic glucose intolerance in obesity, we sought to determine the role of leptin signaling in this context. METHODS Male and female T cell-specific leptin receptor knockout mice and littermate controls were placed on low-fat diet or high-fat diet to induce obesity for 18 weeks. Weight gain, serum glucose levels, systemic glucose tolerance, T cell metabolism, and T cell differentiation and cytokine production were examined. RESULTS In both male and female mice, T cell-specific leptin receptor deficiency did not reverse impaired glucose tolerance in obesity, although it did prevent impaired fasting glucose levels in obese mice compared to littermate controls, in a sex dependent manner. Despite these minimal effects on systemic metabolism, T cell-specific leptin signaling was required for changes in T cell metabolism, differentiation, and cytokine production observed in mice fed high-fat diet compared to low-fat diet. Specifically, we observed increased T cell oxidative metabolism, increased CD4+ T cell IFN-γ expression, and increased proportion of T regulatory (Treg) cells in control mice fed high-fat diet compared to low-fat diet, which were not observed in the leptin receptor conditional knockout mice, suggesting that leptin receptor signaling is required for some of the inflammatory changes observed in T cells in obesity. CONCLUSIONS T cell-specific deficiency of leptin signaling alters T cell metabolism and function in obesity but has minimal effects on obesity-associated systemic metabolism. These results suggest a redundancy in cytokine receptor signaling pathways in response to inflammatory signals in obesity.
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Affiliation(s)
- Kaitlin Kiernan
- Department of Immunology, Duke University School of Medicine, Durham, North Carolina, United States of America
| | - Amanda G. Nichols
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Yazan Alwarawrah
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
| | - Nancie J. MacIver
- Department of Pediatrics, University of North Carolina School of Medicine, Chapel Hill, North Carolina, United States of America
- Department of Nutrition, University of North Carolina School of Medicine and Gillings School of Global Public Health, Chapel Hill, North Carolina, United States of America
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5
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Hu YZ, Li Q, Wang PF, Li XP, Hu ZL. Multiple functions and regulatory network of miR-150 in B lymphocyte-related diseases. Front Oncol 2023; 13:1140813. [PMID: 37182123 PMCID: PMC10172652 DOI: 10.3389/fonc.2023.1140813] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2023] [Accepted: 04/06/2023] [Indexed: 05/16/2023] Open
Abstract
MicroRNAs (miRNAs) play vital roles in the post-transcriptional regulation of gene expression. Previous studies have shown that miR-150 is a crucial regulator of B cell proliferation, differentiation, metabolism, and apoptosis. miR-150 regulates the immune homeostasis during the development of obesity and is aberrantly expressed in multiple B-cell-related malignant tumors. Additionally, the altered expression of MIR-150 is a diagnostic biomarker of various autoimmune diseases. Furthermore, exosome-derived miR-150 is considered as prognostic tool in B cell lymphoma, autoimmune diseases and immune-mediated disorders, suggesting miR-150 plays a vital role in disease onset and progression. In this review, we summarized the miR-150-dependent regulation of B cell function in B cell-related immune diseases.
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Affiliation(s)
- Yue-Zi Hu
- Clinical Laboratory, The Second Affiliated Hospital of Hunan University of Chinese Medicine, Changsha, China
| | - Qiao Li
- Department of Anesthesiology, The Second Affiliated Xiangya Hospital, Central South University, Changsha, China
| | - Peng-Fei Wang
- Department of Anesthesiology, The Second Affiliated Xiangya Hospital, Central South University, Changsha, China
| | - Xue-Ping Li
- Department of Orthopaedic Surgery, Stanford University School of Medicine, Stanford, CA, United States
| | - Zhao-Lan Hu
- Department of Anesthesiology, The Second Affiliated Xiangya Hospital, Central South University, Changsha, China
- *Correspondence: Zhao-Lan Hu,
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6
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Tyler SEB, Tyler LDK. Therapeutic roles of plants for 15 hypothesised causal bases of Alzheimer's disease. NATURAL PRODUCTS AND BIOPROSPECTING 2022; 12:34. [PMID: 35996065 PMCID: PMC9395556 DOI: 10.1007/s13659-022-00354-z] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/07/2022] [Accepted: 06/15/2022] [Indexed: 05/26/2023]
Abstract
Alzheimer's disease (AD) is progressive and ultimately fatal, with current drugs failing to reverse and cure it. This study aimed to find plant species which may provide therapeutic bioactivities targeted to causal agents proposed to be driving AD. A novel toolkit methodology was employed, whereby clinical symptoms were translated into categories recognized in ethnomedicine. These categories were applied to find plant species with therapeutic effects, mined from ethnomedical surveys. Survey locations were mapped to assess how this data is at risk. Bioactivities were found of therapeutic relevance to 15 hypothesised causal bases for AD. 107 species with an ethnological report of memory improvement demonstrated therapeutic activity for all these 15 causal bases. The majority of the surveys were found to reside within biodiversity hotspots (centres of high biodiversity under threat), with loss of traditional knowledge the most common threat. Our findings suggest that the documented plants provide a large resource of AD therapeutic potential. In demonstrating bioactivities targeted to these causal bases, such plants may have the capacity to reduce or reverse AD, with promise as drug leads to target multiple AD hallmarks. However, there is a need to preserve ethnomedical knowledge, and the habitats on which this knowledge depends.
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Affiliation(s)
| | - Luke D K Tyler
- School of Natural Sciences, Bangor University, Gwynedd, UK
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7
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Deletion of LDLRAP1 Induces Atherosclerotic Plaque Formation, Insulin Resistance, and Dysregulated Insulin Response in Adipose Tissue. THE AMERICAN JOURNAL OF PATHOLOGY 2022; 192:1092-1108. [PMID: 35460615 PMCID: PMC9253916 DOI: 10.1016/j.ajpath.2022.03.014] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Revised: 03/18/2022] [Accepted: 03/28/2022] [Indexed: 12/25/2022]
Abstract
Dyslipidemia, vascular inflammation, obesity, and insulin resistance often overlap and exacerbate each other. Mutations in low density lipoprotein receptor adaptor protein-1 (LDLRAP1) lead to LDLR malfunction and are associated with the autosomal recessive hypercholesterolemia disorder in humans. However, direct causality on atherogenesis in a defined preclinical model has not been reported. The objective of this study was to test the hypothesis that deletion of LDLRAP1 will lead to hypercholesteremia and atherosclerosis. LDLRAP1-/- mice fed a high-fat Western diet had significantly increased plasma cholesterol and triglyceride concentrations accompanied with significantly increased plaque burden compared with wild-type controls. Unexpectedly, LDLRAP1-/- mice gained significantly more weight compared with controls. Even on a chow diet, LDLRAP1-/- mice were insulin-resistant, and calorimetric studies suggested an altered metabolic profile. The study showed that LDLRAP1 is highly expressed in visceral adipose tissue, and LDLRAP1-/- adipocytes are significantly larger, have reduced glucose uptake and AKT phosphorylation, but have increased CD36 expression. Visceral adipose tissue from LDLRAP1-/- mice was hypoxic and had gene expression signatures of dysregulated lipid storage and energy homeostasis. These data are the first to indicate that lack of LDLRAP1 directly leads to atherosclerosis in mice and also plays an unanticipated metabolic regulatory role in adipose tissue. LDLRAP1 may link atherosclerosis and hypercholesterolemia with common comorbidities of obesity and insulin resistance.
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8
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Meister BM, Hong SG, Shin J, Rath M, Sayoc J, Park JY. Healthy versus Unhealthy Adipose Tissue Expansion: the Role of Exercise. J Obes Metab Syndr 2022; 31:37-50. [PMID: 35283364 PMCID: PMC8987461 DOI: 10.7570/jomes21096] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/16/2021] [Revised: 12/29/2021] [Accepted: 12/30/2021] [Indexed: 12/14/2022] Open
Abstract
Although the hallmark of obesity is the expansion of adipose tissue, not all adipose tissue expansion is the same. Expansion of healthy adipose tissue is accompanied by adequate capillary angiogenesis and mitochondria-centered metabolic integrity, whereas expansion of unhealthy adipose tissue is associated with capillary and mitochondrial derangement, resulting in deposition of immune cells (M1-stage macrophages) and excess production of pro-inflammatory cytokines. Accumulation of these dysfunctional adipose tissues has been linked to the development of obesity comorbidities, such as type 2 diabetes, hypertension, dyslipidemia, and cardiovascular disease, which are leading causes of human mortality and morbidity in modern society. Mechanistically, vascular rarefaction and mitochondrial incompetency (for example, low mitochondrial content, fragmented mitochondria, defective mitochondrial respiratory function, and excess production of mitochondrial reactive oxygen species) are frequently observed in adipose tissue of obese patients. Recent studies have demonstrated that exercise is a potent behavioral intervention for preventing and reducing obesity and other metabolic diseases. However, our understanding of potential cellular mechanisms of exercise, which promote healthy adipose tissue expansion, is at the beginning stage. In this review, we hypothesize that exercise can induce unique physiological stimuli that can alter angiogenesis and mitochondrial remodeling in adipose tissues and ultimately promote the development and progression of healthy adipogenesis. We summarize recent reports on how regular exercise can impose differential processes that lead to the formation of either healthy or unhealthy adipose tissue and discuss key knowledge gaps that warrant future research.
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Affiliation(s)
- Benjamin M Meister
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Soon-Gook Hong
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Junchul Shin
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Meghan Rath
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Jacqueline Sayoc
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
| | - Joon-Young Park
- Department of Kinesiology, College of Public Health and Cardiovascular Research Center, Lewis Katz School of Medicine, Temple University, Philadelphia, PA, USA
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9
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Foulkes AS, Selvaggi C, Shinnick D, Lumish H, Kim E, Cao T, Thaweethai T, Qian J, Lu F, Yan J, Cheng D, He W, Clerkin KJ, Madhavan MV, Meigs JB, Triant VA, Lubitz SA, Gupta A, Bassett IV, Reilly MP. Understanding the Link Between Obesity and Severe COVID-19 Outcomes: Causal Mediation by Systemic Inflammatory Response. J Clin Endocrinol Metab 2022; 107:e698-e707. [PMID: 34473294 PMCID: PMC8499919 DOI: 10.1210/clinem/dgab629] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Indexed: 02/03/2023]
Abstract
BACKGROUND Obesity is an established risk factor for severe COVID-19 outcomes. The mechanistic underpinnings of this association are not well-understood. OBJECTIVE To evaluate the mediating role of systemic inflammation in obesity-associated COVID-19 outcomes. METHODS This hospital-based, observational study included 3828 SARS-CoV-2-infected patients who were hospitalized February to May 2020 at Massachusetts General Hospital (MGH) or Columbia University Irving Medical Center/New York Presbyterian Hospital (CUIMC/NYP). We use mediation analysis to evaluate whether peak inflammatory biomarkers (C-reactive protein [CRP], erythrocyte sedimentation rate [ESR], D-dimer, ferritin, white blood cell count and interleukin-6) are in the causal pathway between obesity (BMI ≥ 30) and mechanical ventilation or death within 28 days of presentation to care. RESULTS In the MGH cohort (n = 1202), obesity was associated with greater likelihood of ventilation or death (OR = 1.73; 95% CI = [1.25, 2.41]; P = 0.001) and higher peak CRP (P < 0.001) compared with nonobese patients. The estimated proportion of the association between obesity and ventilation or death mediated by CRP was 0.49 (P < 0.001). Evidence of mediation was more pronounced in patients < 65 years (proportion mediated = 0.52 [P < 0.001] vs 0.44 [P = 0.180]). Findings were more moderate but consistent for peak ESR. Mediation by other inflammatory markers was not supported. Results were replicated in CUIMC/NYP cohort (n = 2626). CONCLUSION Findings support systemic inflammatory pathways in obesity-associated severe COVID-19 disease, particularly in patients < 65 years, captured by CRP and ESR. Contextualized in clinical trial findings, these results reveal therapeutic opportunity to target systemic inflammatory pathways and monitor interventions in high-risk subgroups and particularly obese patients.
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Affiliation(s)
- Andrea S Foulkes
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Caitlin Selvaggi
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Daniel Shinnick
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Heidi Lumish
- Division of Cardiology, Columbia University, New York, NY 10027, USA
| | - Eunyoung Kim
- Division of Cardiology, Columbia University, New York, NY 10027, USA
| | - Tingyi Cao
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Biostatistics, Harvard T.H. Chan School of Public Health, Boston, MA 02115, USA
| | - Tanayott Thaweethai
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Jing Qian
- Biostatistics and Epidemiology, University of Massachusetts, Amherst, MA 01003, USA
| | - Frances Lu
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Joyce Yan
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - David Cheng
- Biostatistics Center, Massachusetts General Hospital, Boston, MA 02114, USA
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Wei He
- Division of General Internal Medicine, Massachusetts General Hospital, Boston, MA 02114, United States of America
| | - Kevin J Clerkin
- Division of Cardiology, Columbia University, New York, NY 10027, USA
| | - Mahesh V Madhavan
- Division of Cardiology, Columbia University, New York, NY 10027, USA
| | - James B Meigs
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Virginia A Triant
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Steven A Lubitz
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Aakriti Gupta
- Division of Cardiology, Columbia University, New York, NY 10027, USA
| | - Ingrid V Bassett
- Department of Medicine, Harvard Medical School, Boston, MA 02115, USA
| | - Muredach P Reilly
- Division of Cardiology, Columbia University, New York, NY 10027, USA
- Irving Institute for Clinical and Translational Research, Columbia University, New York, NY 10032, USA
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10
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Diaz-Canestro C, Xu A. Impact of Different Adipose Depots on Cardiovascular Disease. J Cardiovasc Pharmacol 2021; 78:S30-S39. [PMID: 34840259 DOI: 10.1097/fjc.0000000000001131] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/15/2021] [Accepted: 08/05/2021] [Indexed: 12/13/2022]
Abstract
ABSTRACT Adipose tissue (AT)-derived factors contribute to the regulation of cardiovascular homeostasis, thereby playing an important role in cardiovascular health and disease. In obesity, AT expands and becomes dysfunctional, shifting its secretory profile toward a proinflammatory state associated with deleterious effects on the cardiovascular system. AT in distinct locations (ie, adipose depots) differs in crucial phenotypic variables, including inflammatory and secretory profile, cellular composition, lipolytic activity, and gene expression. Such heterogeneity among different adipose depots may explain contrasting cardiometabolic risks associated with different obesity phenotypes. In this respect, central obesity, defined as the accumulation of AT in the abdominal region, leads to higher risk of cardiometabolic alterations compared with the accumulation of AT in the gluteofemoral region (ie, peripheral obesity). The aim of this review was to provide an updated summary of clinical and experimental evidence supporting the differential roles of different adipose depots in cardiovascular disease and to discuss the molecular basis underlying the differences of adipose depots in the regulation of cardiovascular function.
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Affiliation(s)
- Candela Diaz-Canestro
- State Key Laboratory of Pharmaceutical Biotechnology, the University of Hong Kong, Hong Kong, China
- Department of Medicine, the University of Hong Kong, Hong Kong, China; and
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, the University of Hong Kong, Hong Kong, China
- Department of Medicine, the University of Hong Kong, Hong Kong, China; and
- Department of Pharmacology and Pharmacy, the University of Hong Kong, Hong Kong, China
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11
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Banfi C, Baetta R, Barbieri SS, Brioschi M, Guarino A, Ghilardi S, Sandrini L, Eligini S, Polvani G, Bergman O, Eriksson P, Tremoli E. Prenylcysteine oxidase 1, an emerging player in atherosclerosis. Commun Biol 2021; 4:1109. [PMID: 34548610 PMCID: PMC8455616 DOI: 10.1038/s42003-021-02630-z] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/27/2020] [Accepted: 09/02/2021] [Indexed: 02/08/2023] Open
Abstract
The research into the pathophysiology of atherosclerosis has considerably increased our understanding of the disease complexity, but still many questions remain unanswered, both mechanistically and pharmacologically. Here, we provided evidence that the pro-oxidant enzyme Prenylcysteine Oxidase 1 (PCYOX1), in the human atherosclerotic lesions, is both synthesized locally and transported within the subintimal space by proatherogenic lipoproteins accumulating in the arterial wall during atherogenesis. Further, Pcyox1 deficiency in Apoe-/- mice retards atheroprogression, is associated with decreased features of lesion vulnerability and lower levels of lipid peroxidation, reduces plasma lipid levels and inflammation. PCYOX1 silencing in vitro affects the cellular proteome by influencing multiple functions related to inflammation, oxidative stress, and platelet adhesion. Collectively, these findings identify the pro-oxidant enzyme PCYOX1 as an emerging player in atherogenesis and, therefore, understanding the biology and mechanisms of all functions of this unique enzyme is likely to provide additional therapeutic opportunities in addressing atherosclerosis.
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Affiliation(s)
- C. Banfi
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - R. Baetta
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - S. S. Barbieri
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - M. Brioschi
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - A. Guarino
- grid.418230.c0000 0004 1760 1750Cardiovascular Tissue Bank of Milan, Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - S. Ghilardi
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - L. Sandrini
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - S. Eligini
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - G. Polvani
- grid.418230.c0000 0004 1760 1750Cardiovascular Tissue Bank of Milan, Centro Cardiologico Monzino IRCCS, Milano, Italy ,grid.4708.b0000 0004 1757 2822Department of Clinical Sciences and Community Health, Cardiovascular Section, University of Milan, Milano, Italy ,grid.418230.c0000 0004 1760 1750Department of Cardiovascular Disease, Development and Innovation Cardiac Surgery Unit, Centro Cardiologico Monzino IRCCS, Milano, Italy
| | - O. Bergman
- grid.4714.60000 0004 1937 0626Department of Medicine Solna, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - P. Eriksson
- grid.4714.60000 0004 1937 0626Department of Medicine Solna, Karolinska University Hospital, Karolinska Institutet, Stockholm, Sweden
| | - E. Tremoli
- grid.418230.c0000 0004 1760 1750Centro Cardiologico Monzino IRCCS, Milano, Italy
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12
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Chandra NC. A comprehensive account of insulin and LDL receptor activity over the years: A highlight on their signaling and functional role. J Biochem Mol Toxicol 2021; 35:e22840. [PMID: 34227185 DOI: 10.1002/jbt.22840] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2020] [Revised: 05/13/2021] [Accepted: 06/25/2021] [Indexed: 11/08/2022]
Abstract
Insulin receptor (IR) was discovered in 1970. Shortcomings in IR transcribed signals were found pro-diabetic, which could also inter-relate obesity and atherosclerosis in a time-dependent manner. Low-density lipoprotein receptor (LDLR) was discovered in 1974. Later studies showed that insulin could modulate LDLR expression and activity. Repression of LDLR transcription in the absence or inactivity of insulin showed a direct cause of atherosclerosis. Leptin receptor (OB-R) was found in 1995 and its resistance became responsible for developing obesity. The three interlinked pathologies namely, diabetes, atherosclerosis, and obesity were later on marked as metabolic syndrome-X (MSX). In 2012, the IR-LDLR inter-association was identified. In 2019, the proficiency of signal transmission from this IR-LDLR receptor complex was reported. LDLR was found to mimic IR-generated signaling path when it remains bound to IR in IR-DLR interlocked state. This was the first time LDLR was found sending messages besides its LDL-clearing activity from blood vessels.
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Affiliation(s)
- Nimai C Chandra
- Department of Biochemistry, All India Institute of Medical Sciences, Patna, India
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13
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Johnson C, Drummer IV C, Shan H, Shao Y, Sun Y, Lu Y, Saaoud F, Xu K, Nanayakkara G, Fang P, Bagi Z, Jiang X, Choi ET, Wang H, Yang X. A Novel Subset of CD95 + Pro-Inflammatory Macrophages Overcome miR155 Deficiency and May Serve as a Switch From Metabolically Healthy Obesity to Metabolically Unhealthy Obesity. Front Immunol 2021; 11:619951. [PMID: 33488632 PMCID: PMC7817616 DOI: 10.3389/fimmu.2020.619951] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Accepted: 11/20/2020] [Indexed: 12/11/2022] Open
Abstract
Metabolically healthy obesity (MHO) accounts for roughly 35% of all obese patients. There is no clear consensus that has been reached on whether MHO is a stable condition or merely a transitory period between metabolically healthy lean and metabolically unhealthy obesity (MUO). Additionally, the mechanisms underlying MHO and any transition to MUO are not clear. Macrophages are the most common immune cells in adipose tissues and have a significant presence in atherosclerosis. Fas (or CD95), which is highly expressed on macrophages, is classically recognized as a pro-apoptotic cell surface receptor. However, Fas also plays a significant role as a pro-inflammatory molecule. Previously, we established a mouse model (ApoE-/-/miR155-/-; DKO mouse) of MHO, based on the criteria of not having metabolic syndrome (MetS) and insulin resistance (IR). In our current study, we hypothesized that MHO is a transition phase toward MUO, and that inflammation driven by our newly classified CD95+CD86- macrophages is a novel mechanism for this transition. We found that, with extended (24 weeks) high-fat diet feeding (HFD), MHO mice became MUO, shown by increased atherosclerosis. Mechanistically, we found the following: 1) at the MHO stage, DKO mice exhibited increased pro-inflammatory markers in adipose tissue, including CD95, and serum; 2) total adipose tissue macrophages (ATMs) increased; 3) CD95+CD86- subset of ATMs also increased; and 4) human aortic endothelial cells (HAECs) were activated (as determined by upregulated ICAM1 expression) when incubated with conditioned media from CD95+-containing DKO ATMs and human peripheral blood mononuclear cells-derived macrophages in comparison to respective controls. These results suggest that extended HFD in MHO mice promotes vascular inflammation and atherosclerosis via increasing CD95+ pro-inflammatory ATMs. In conclusion, we have identified a novel molecular mechanism underlying MHO transition to MUO with HFD. We have also found a previously unappreciated role of CD95+ macrophages as a potentially novel subset that may be utilized to assess pro-inflammatory characteristics of macrophages, specifically in adipose tissue in the absence of pro-inflammatory miR-155. These findings have provided novel insights on MHO transition to MUO and new therapeutic targets for the future treatment of MUO, MetS, other obese diseases, and type II diabetes.
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MESH Headings
- Adipose Tissue, White/metabolism
- Adipose Tissue, White/pathology
- Animals
- Aorta
- Aortic Diseases/etiology
- Atherosclerosis/etiology
- B7-2 Antigen/analysis
- Cells, Cultured
- Culture Media, Conditioned/pharmacology
- Diet, High-Fat/adverse effects
- Disease Progression
- Endothelial Cells/drug effects
- Endothelial Cells/metabolism
- Female
- Humans
- Inflammation/complications
- Inflammation/immunology
- Intercellular Adhesion Molecule-1/biosynthesis
- Macrophages/chemistry
- Macrophages/classification
- Macrophages/physiology
- Male
- Mice
- Mice, Inbred C57BL
- Mice, Knockout, ApoE
- MicroRNAs/physiology
- Obesity, Metabolically Benign/immunology
- Obesity, Metabolically Benign/metabolism
- Obesity, Metabolically Benign/pathology
- Vasculitis/etiology
- fas Receptor/analysis
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Affiliation(s)
- Candice Johnson
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Charles Drummer IV
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Huimin Shan
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Ying Shao
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Yu Sun
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Yifan Lu
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Fatma Saaoud
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Keman Xu
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Gayani Nanayakkara
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Pu Fang
- Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Zsolt Bagi
- Vascular Biology Center, Augusta University, Augusta, GA, United States
| | - Xiaohua Jiang
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Eric T. Choi
- Division of Vascular and Endovascular Surgery, Department of Surgery, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Hong Wang
- Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Departments of Pharmacology, Microbiology and Immunology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
| | - Xiaofeng Yang
- Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Metabolic Disease Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Departments of Pharmacology, Microbiology and Immunology, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
- Centers for Inflammation, Translational and Clinical Lung Research, Lewis Katz School of Medicine at Temple University, Philadelphia, PA, United States
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14
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Semerad O, Buchler T, Vejmelka J, Rozsypalova A, Tomesova J, Kohout P. Body composition changes during and after curative chemotherapy in patients with testicular cancer. Biomed Pap Med Fac Univ Palacky Olomouc Czech Repub 2020; 166:91-96. [PMID: 33325458 DOI: 10.5507/bp.2020.058] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2020] [Accepted: 11/23/2020] [Indexed: 11/23/2022] Open
Abstract
BACKGROUND Testicular cancer is associated with excellent prognosis and cure is achieved in most patients with advanced cancer treated with cisplatin-based chemotherapy. However, testicular cancer survivors are at increased risk of accelerated atherosclerosis, which significantly contributes to their late morbidity and mortality. Atherosclerosis is associated with a higher proportion of fat mass and especially with increased amount of visceral fat. We explored the effects of cisplatin-based chemotherapy on body composition during and after the treatment. PATIENTS AND METHODS We studied 30 testicular cancer patients before chemotherapy, after the second cycle of chemotherapy and three months after the end of chemotherapy. Body composition parameters were evaluated using bioelectrical impedance analysis (BIA). RESULTS Three months after the end of chemotherapy the fat mass had increased from 22.04±7.15% to 23.92±7.33% (P=0.026) and visceral fat volume had increased by 17% from 2.36±1.75l to 2.77±1.94l (P=0.013). In the whole sample there was a decrease in muscle mass after the second cycle of chemotherapy (-1.33 ± 2 kg on average; P=0.005). The changes in body composition varied according to distinct baseline fat mass. CONCLUSION Cisplatin-based chemotherapy was associated with increase of fat mass, visceral fat, and body mass index. We also observed decrease in muscle mass and total body water. Our results suggest that BIA could help to target preventative measures to avert the acceleration of atherosclerosis in patients treated with cisplatin-based chemotherapy.
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Affiliation(s)
- Otakar Semerad
- Department of Internal Medicine, Third Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Tomas Buchler
- Department of Oncology, First Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Jiri Vejmelka
- Department of Internal Medicine, Third Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Aneta Rozsypalova
- Department of Oncology, First Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
| | - Jitka Tomesova
- Nutrition Centre, Thomayer Hospital, Prague, Czech Republic
| | - Pavel Kohout
- Department of Internal Medicine, Third Faculty of Medicine, Charles University and Thomayer Hospital, Prague, Czech Republic
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15
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Chanclón B, Wu Y, Vujičić M, Bauzá-Thorbrügge M, Banke E, Micallef P, Kanerva J, Wilder B, Rorsman P, Wernstedt Asterholm I. Peripancreatic adipose tissue protects against high-fat-diet-induced hepatic steatosis and insulin resistance in mice. Int J Obes (Lond) 2020; 44:2323-2334. [PMID: 32843711 PMCID: PMC7577900 DOI: 10.1038/s41366-020-00657-6] [Citation(s) in RCA: 13] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/04/2019] [Revised: 07/27/2020] [Accepted: 08/15/2020] [Indexed: 12/20/2022]
Abstract
Background/objectives Visceral adiposity is associated with increased diabetes risk, while expansion of subcutaneous adipose tissue may be protective. However, the visceral compartment contains different fat depots. Peripancreatic adipose tissue (PAT) is an understudied visceral fat depot. Here, we aimed to define PAT functionality in lean and high-fat-diet (HFD)-induced obese mice. Subjects/methods Four adipose tissue depots (inguinal, mesenteric, gonadal, and peripancreatic adipose tissue) from chow- and HFD-fed male mice were compared with respect to adipocyte size (n = 4–5/group), cellular composition (FACS analysis, n = 5–6/group), lipogenesis and lipolysis (n = 3/group), and gene expression (n = 6–10/group). Radioactive tracers were used to compare lipid and glucose metabolism between these four fat depots in vivo (n = 5–11/group). To determine the role of PAT in obesity-associated metabolic disturbances, PAT was surgically removed prior to challenging the mice with HFD. PAT-ectomized mice were compared to sham controls with respect to glucose tolerance, basal and glucose-stimulated insulin levels, hepatic and pancreatic steatosis, and gene expression (n = 8–10/group). Results We found that PAT is a tiny fat depot (~0.2% of the total fat mass) containing relatively small adipocytes and many “non-adipocytes” such as leukocytes and fibroblasts. PAT was distinguished from the other fat depots by increased glucose uptake and increased fatty acid oxidation in both lean and obese mice. Moreover, PAT was the only fat depot where the tissue weight correlated positively with liver weight in obese mice (R = 0.65; p = 0.009). Surgical removal of PAT followed by 16-week HFD feeding was associated with aggravated hepatic steatosis (p = 0.008) and higher basal (p < 0.05) and glucose-stimulated insulin levels (p < 0.01). PAT removal also led to enlarged pancreatic islets and increased pancreatic expression of markers of glucose-stimulated insulin secretion and islet development (p < 0.05). Conclusions PAT is a small metabolically highly active fat depot that plays a previously unrecognized role in the pathogenesis of hepatic steatosis and insulin resistance in advanced obesity.
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Affiliation(s)
- Belén Chanclón
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Yanling Wu
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Milica Vujičić
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Marco Bauzá-Thorbrügge
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Elin Banke
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Peter Micallef
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Julia Kanerva
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Björn Wilder
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden
| | - Patrik Rorsman
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden.,Oxford Centre for Diabetes, Endocrinology and Metabolism, Radcliffe Department of Medicine, University of Oxford, Oxford, OX4 7LE, UK
| | - Ingrid Wernstedt Asterholm
- Department of Physiology (Metabolic Physiology Research Unit), Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Box 432, SE405 30, Gothenburg, Sweden.
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16
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Novel Body Composition Predictors of Outcome in Patients With Angiosarcoma of the Breast: A Preliminary Study. J Comput Assist Tomogr 2020; 44:605-609. [DOI: 10.1097/rct.0000000000001066] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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17
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Zhang T, Chen J, Tang X, Luo Q, Xu D, Yu B. Interaction between adipocytes and high-density lipoprotein:new insights into the mechanism of obesity-induced dyslipidemia and atherosclerosis. Lipids Health Dis 2019; 18:223. [PMID: 31842884 PMCID: PMC6913018 DOI: 10.1186/s12944-019-1170-9] [Citation(s) in RCA: 66] [Impact Index Per Article: 13.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2019] [Accepted: 12/09/2019] [Indexed: 12/19/2022] Open
Abstract
Obesity is the most common nutritional disorder worldwide and is associated with dyslipidemia and atherosclerotic cardiovascular disease. The hallmark of dyslipidemia in obesity is low high density lipoprotein (HDL) cholesterol (HDL-C) levels. Moreover, the quality of HDL is also changed in the obese setting. However, there are still some disputes on the explanations for this phenomenon. There is increasing evidence that adipose tissue, as an energy storage tissue, participates in several metabolism activities, such as hormone secretion and cholesterol efflux. It can influence overall reverse cholesterol transport and plasma HDL-C level. In obesity individuals, the changes in morphology and function of adipose tissue affect plasma HDL-C levels and HDL function, thus, adipose tissue should be the main target for the treatment of HDL metabolism in obesity. In this review, we will summarize the cross-talk between adipocytes and HDL related to cardiovascular disease and focus on the new insights of the potential mechanism underlying obesity and HDL dysfunction.
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Affiliation(s)
- Tianhua Zhang
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
| | - Jin Chen
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
| | - Xiaoyu Tang
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
| | - Qin Luo
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
| | - Danyan Xu
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China
| | - Bilian Yu
- Department of Cardiovascular Medicine, the Second Xiangya Hospital, Central South University, Changsha, Hunan, 410011, People's Republic of China.
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18
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Decreased M1 macrophage polarization in dabigatran-treated Ldlr-deficient mice: Implications for atherosclerosis and adipose tissue inflammation. Atherosclerosis 2019; 287:81-88. [DOI: 10.1016/j.atherosclerosis.2019.06.897] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/06/2018] [Revised: 05/14/2019] [Accepted: 06/07/2019] [Indexed: 12/22/2022]
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19
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de Boer SA, Spoor DS, Slart RHJA, Mulder DJ, Reijrink M, Borra RJH, Kramer GM, Hoekstra OS, Boellaard R, Greuter MJ. Performance Evaluation of a Semi-automated Method for [ 18F]FDG Uptake in Abdominal Visceral Adipose Tissue. Mol Imaging Biol 2019; 21:159-167. [PMID: 29789994 DOI: 10.1007/s11307-018-1211-1] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
PURPOSE Severity of abdominal obesity and possibly levels of metabolic activity of abdominal visceral adipose tissue (VAT) are associated with an increased risk for cardiovascular disease (CVD). In this context, the purpose of the current study was to evaluate the reproducibility and repeatability of a semi-automated method for assessment of the metabolic activity of VAT using 2-deoxy-2-[18F]fluoro-D-glucose ([18F]FDG) positron emission tomography (PET)/x-ray computed tomography (CT). PROCEDURES Ten patients with lung cancer who underwent two baseline whole-body [18F]FDG PET/low-dose (LD) CT scans within 1 week were included. Abdominal VAT was automatically segmented using CT between levels L1-L5. The initial CT-based segmentation was further optimized using PET data with a standardized uptake value (SUV) threshold approach (range 1.0-2.5) and morphological erosion (range 0-5 pixels). The [18F]FDG uptake in SUV that was measured by the automated method was compared with manual analysis. The reproducibility and repeatability were quantified using intraclass correlation coefficients (ICCs). RESULTS The metabolic assessment of VAT on [18F]FDG PET/LDCT scans expressed as SUVmean, using an automated method showed high inter and intra observer (all ICCs > 0.99) and overall repeatability (ICC = 0.98). The manual method showed reproducible inter observer (all ICCs > 0.92), but less intra observer (ICC = 0.57) and less overall repeatability (ICC = 0.78) compared with the automated method. CONCLUSIONS Our proposed semi-automated method provided reproducible and repeatable quantitative analysis of [18F]FDG uptake in VAT. We expect this method to aid future research regarding the role of VAT in development of CVD.
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Affiliation(s)
- Stefanie A de Boer
- Department of Vascular Medicine, University Medical Center Groningen, University of Groningen, HP AA41, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands.
| | - Daan S Spoor
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Technical Medicine, University of Twente, Enschede, The Netherlands
| | - Riemer H J A Slart
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Biomedical Technology and Technical Medicine (MIRA), University of Twente, Enschede, The Netherlands
| | - Douwe J Mulder
- Department of Vascular Medicine, University Medical Center Groningen, University of Groningen, HP AA41, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Melanie Reijrink
- Department of Vascular Medicine, University Medical Center Groningen, University of Groningen, HP AA41, Hanzeplein 1, 9713 GZ, Groningen, The Netherlands
| | - Ronald J H Borra
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Medical Imaging Center of Southwest Finland, Department of Diagnostic Radiology, Turku University Hospital, University of Turku, Turku, Finland.,Department of Radiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
| | - Gerbrand M Kramer
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Otto S Hoekstra
- Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Ronald Boellaard
- Department of Nuclear Medicine and Molecular Imaging, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands.,Department of Radiology and Nuclear Medicine, VU University Medical Center, Amsterdam, The Netherlands
| | - Marcel J Greuter
- Biomedical Technology and Technical Medicine (MIRA), University of Twente, Enschede, The Netherlands.,Department of Radiology, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
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Soya protein β-conglycinin ameliorates fatty liver and obesity in diet-induced obese mice through the down-regulation of PPARγ. Br J Nutr 2019; 119:1220-1232. [PMID: 29770757 DOI: 10.1017/s0007114518000739] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Diets high in fat can result in obesity and non-alcoholic fatty liver disease (NAFLD). The improvement of obesity and NAFLD is an important issue. β-Conglycinin, one of the soya proteins, is known to prevent hyperlipidaemia, obesity and NAFLD. Therefore, we aimed to investigate the effects of β-conglycinin on the improvement of obesity and NAFLD in high-fat (HF) diet-induced obese (DIO) mice and clarify the mechanism underlying these effects in liver and white adipose tissue (WAT). DIO male ddY mice were divided into six groups: HF, medium-fat (MF) and low-fat (LF) groups fed casein, and HF, MF and LF groups in all of which the casein was replaced by β-conglycinin. A period of 5 weeks later, the β-conglycinin-supplemented group resulted in lower body weight, relative weight of subcutaneous WAT, and hepatic TAG content (P=0·001). Furthermore, β-conglycinin suppressed the hepatic expression of Pparγ2 in the HF dietary group, sterol regulatory element-binding protein-1c and the target genes. The expressions of inflammation-related genes were significantly low in the epididymal and subcutaneous WAT from the mice fed β-conglycinin compared with those fed casein in the HF dietary group. Moreover, the expressions of Pparγ1 and Pparγ2 mRNA were suppressed in subcutaneous WAT in the HF dietary group but not in epididymal WAT. The concentrations of insulin and leptin were low in the serum of the mice fed β-conglycinin. In conclusion, β-conglycinin effectively improved obesity and NAFLD in DIO mice, and it appears to be a promising dietary protein for the amelioration of NAFLD and obesity.
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Adipose tissue macrophages do not affect atherosclerosis development in mice. Atherosclerosis 2019; 281:31-37. [DOI: 10.1016/j.atherosclerosis.2018.12.010] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/09/2018] [Revised: 12/06/2018] [Accepted: 12/07/2018] [Indexed: 01/21/2023]
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Galmés S, Cifre M, Palou A, Oliver P, Serra F. A Genetic Score of Predisposition to Low-Grade Inflammation Associated with Obesity May Contribute to Discern Population at Risk for Metabolic Syndrome. Nutrients 2019; 11:E298. [PMID: 30704070 PMCID: PMC6412420 DOI: 10.3390/nu11020298] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2018] [Revised: 01/16/2019] [Accepted: 01/24/2019] [Indexed: 12/26/2022] Open
Abstract
Omega-3 rich diets have been shown to improve inflammatory status. However, in an ex vivo system of human blood cells, the efficacy of eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA) modulating lipid metabolism and cytokine response is attenuated in overweight subjects and shows high inter-individual variability. This suggests that obesity may be exerting a synergistic effect with genetic background disturbing the anti-inflammatory potential of omega-3 long-chain polyunsaturated fatty acids (PUFA). In the present work, a genetic score aiming to explore the risk associated to low grade inflammation and obesity (LGI-Ob) has been elaborated and assessed as a tool to contribute to discern population at risk for metabolic syndrome. Pro-inflammatory gene expression and cytokine production as a response to omega-3 were associated with LGI-Ob score; and lower anti-inflammatory effect of PUFA was observed in subjects with a high genetic score. Furthermore, overweight/obese individuals showed positive correlation of both plasma C-Reactive Protein and triglyceride/HDLc-index with LGI-Ob; and high LGI-Ob score was associated with greater hypertension (p = 0.047), Type 2 diabetes (p = 0.026), and metabolic risk (p = 0.021). The study shows that genetic variation can influence inflammation and omega-3 response, and that the LGI-Ob score could be a useful tool to classify subjects at inflammatory risk and more prone to suffer metabolic syndrome and associated metabolic disturbances.
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Affiliation(s)
- Sebastià Galmés
- NUO Group, Laboratory of Molecular Biology, Nutrition and Biotechnology, Universitat de les Illes Balears, 07122 Palma, Spain.
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain.
- Institut d'Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain.
| | - Margalida Cifre
- NUO Group, Laboratory of Molecular Biology, Nutrition and Biotechnology, Universitat de les Illes Balears, 07122 Palma, Spain.
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain.
| | - Andreu Palou
- NUO Group, Laboratory of Molecular Biology, Nutrition and Biotechnology, Universitat de les Illes Balears, 07122 Palma, Spain.
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain.
- Institut d'Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain.
| | - Paula Oliver
- NUO Group, Laboratory of Molecular Biology, Nutrition and Biotechnology, Universitat de les Illes Balears, 07122 Palma, Spain.
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain.
- Institut d'Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain.
| | - Francisca Serra
- NUO Group, Laboratory of Molecular Biology, Nutrition and Biotechnology, Universitat de les Illes Balears, 07122 Palma, Spain.
- CIBER de Fisiopatología de la Obesidad y Nutrición (CIBEROBN), 28029 Madrid, Spain.
- Institut d'Investigació Sanitària Illes Balears (IdISBa), 07120 Palma, Spain.
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Wang W, Shen C, Zhao H, Tang W, Yang S, Li J, Ren Z, Zhao Y. A prospective study of the hypertriglyceridemic waist phenotype and risk of incident ischemic stroke in a Chinese rural population. Acta Neurol Scand 2018; 138:156-162. [PMID: 29574685 DOI: 10.1111/ane.12925] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 02/21/2018] [Indexed: 12/28/2022]
Abstract
OBJECTIVES The hypertriglyceridemic waist phenotype has been reported as a practical tool to screen people with an increased risk of coronary artery disease and type 2 diabetes. The aim of this study was to investigate the relationship between the phenotype and ischemic stroke in a rural population in south China. MATERIALS AND METHODS A total of 4081 participants aged over 35 years old without a stroke history were surveyed in 2009 and followed up from May 2014 to January 2016. The hypertriglyceridemic waist phenotype was defined as a waist circumference ≥90 cm and a triglyceride level ≥2.0 mmol/L in males, and a waist circumference ≥85 cm and a triglyceride level ≥1.5 mmol/L in females. A Cox regression model was used to estimate the association of the phenotype and ischemic stroke. RESULTS After a mean of 5.16 years of follow-up, 138 individuals developed ischemic stroke. The hypertriglyceridemic waist phenotype was significantly associated with an increased risk of ischemic stroke before and after adjustment for confounding factors; the hazard ratios and 95% confidence intervals were 1.94 (1.27-2.96) and 1.71 (1.05-2.78), respectively. Further stratified analysis confirmed the associations in females (2.37 [1.09-5.14]) and smokers (3.20 [1.30-7.92]). A significant association of the phenotype and ischemic stroke risk was observed in subjects with normal glucose levels (2.94 [1.58-5.47]) but not in subjects with impaired fasting glucose and diabetes. CONCLUSIONS The hypertriglyceridemic waist phenotype is associated with an increased risk of ischemic stroke and might be a simple tool to screen individuals with a high risk for ischemic stroke.
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Affiliation(s)
- W. Wang
- Department of Neurology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
| | - C. Shen
- Department of Epidemiology; School of Public Health; Nanjing Medical University; Nanjing Jiangsu China
- Department of Clinical Epidemiology; Jiangsu Province Geriatrics Institute; Nanjing Jiangsu China
| | - H. Zhao
- Department of Chronic Disease Management; Huaian City Center for Disease Control and Prevention; Huaian Jiangsu China
| | - W. Tang
- Department of Neurology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
| | - S. Yang
- Department of Cardiology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
| | - J. Li
- Department of Neurology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
| | - Z. Ren
- Department of Neurology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
| | - Y. Zhao
- Department of Neurology; Affiliated Yixing Hospital of Jiangsu University; Yixing Jiangsu China
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Bushenkangshuai Tablet Reduces Atherosclerotic Lesion by Improving Blood Lipids Metabolism and Inhibiting Inflammatory Response via TLR4 and NF- κB Signaling Pathway. EVIDENCE-BASED COMPLEMENTARY AND ALTERNATIVE MEDICINE 2018; 2018:1758383. [PMID: 29619063 PMCID: PMC5829360 DOI: 10.1155/2018/1758383] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/04/2017] [Revised: 11/06/2017] [Accepted: 12/10/2017] [Indexed: 12/21/2022]
Abstract
Bushenkangshuai tablet (BSKS) is a Chinese herbal compound which has been used for the treatment of cardiovascular and cerebrovascular diseases in China for decades. This study intends to explore the molecular mechanism of BSKS against atherosclerosis in ApoE−/− mice. ApoE−/− mice were fed with western-type diet for 6 weeks and then were given BSKS for 6 weeks. The results showed that BSKS attenuated the size of the atherosclerotic lesion, reduced visceral adipose content, and decreased blood lipids. We also found that BSKS promoted the expression of adiponectin and its receptors, inhibited the expression of Toll-like receptor 4 and nuclear factor-kappa B, decreased the levels of interleukin-1 beta, monocyte chemotactic protein-1, and vascular cell adhesion molecule-1, and increased the levels of interleukin-10 and adiponectin. Our data provided evidence that BSKS exerted an antiatherosclerotic effect by lowering blood lipids and inhibiting inflammatory response via TLR4 and NF-κB signaling pathway.
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Zieger K, Weiner J, Krause K, Schwarz M, Kohn M, Stumvoll M, Blüher M, Heiker JT. Vaspin suppresses cytokine-induced inflammation in 3T3-L1 adipocytes via inhibition of NFκB pathway. Mol Cell Endocrinol 2018; 460:181-188. [PMID: 28756250 DOI: 10.1016/j.mce.2017.07.022] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Revised: 06/13/2017] [Accepted: 07/24/2017] [Indexed: 01/06/2023]
Abstract
Vaspin expression is increased in white adipose tissue (WAT) of diet-induced obese mice and rats and is supposed to compensate HFD-induced inflammatory processes and insulin resistance in adipose tissue by counteracting pro-inflammatory gene expression in obesity. Multiple studies have also demonstrated strong anti-inflammatory effects in vascular and skin cells. Here, we used vaspin treated 3T3-L1 murine adipocytes as well as 3T3-L1 cells with stable vaspin expression to investigate the effect of exogenous and endogenous vaspin on inflammatory processes and insulin signaling in adipocytes. Our stably transfected cells secreted significant amounts of vaspin which was in the physiological range of ∼0.5 ng/ml in cell supernatants. Adipocyte differentiation was not affected by vaspin as expression of adipogenic marker genes as well as lipid accumulation after full differentiation was similar to control cells. We found that IL-1β induced expression and secretion of pro-inflammatory cytokines, such as IL-6, MCP1 and TNFα was significantly blunted in vaspin expressing 3T3-L1 cells. Treatment of 3T3-L1 cells with exogenous vaspin resulted in reduced cytokine-induced activation of the intracellular and pro-inflammatory NFκB signaling cascades (IKKα/β, IκB and NFκB). Moreover, endogenous vaspin positively affected insulin signaling by increasing insulin-stimulated phosphorylation of the key mediator protein kinase B (AKT). Together, we demonstrate anti-inflammatory effects of vaspin in 3T3-L1 adipocytes as well as increased insulin signaling by endogenous expression or exogenous treatment. The results provide evidence for potent anti-inflammatory action of vaspin not only in vascular cells but also in adipose tissue.
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Affiliation(s)
- Konstanze Zieger
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany
| | - Juliane Weiner
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany; Divisions of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany
| | - Kerstin Krause
- Divisions of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany
| | - Maximilian Schwarz
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany
| | - Martin Kohn
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany
| | - Michael Stumvoll
- Divisions of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany
| | - Matthias Blüher
- Divisions of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany; IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany
| | - John T Heiker
- Institute of Biochemistry, Faculty of Biosciences, Pharmacy and Psychology, University of Leipzig, Leipzig, Germany; Divisions of Endocrinology and Nephrology, University of Leipzig, Leipzig, Germany; IFB Adiposity Diseases, University of Leipzig, Leipzig, Germany.
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Xiong W, Zhao X, Garcia-Barrio MT, Zhang J, Lin J, Chen YE, Jiang Z, Chang L. MitoNEET in Perivascular Adipose Tissue Blunts Atherosclerosis under Mild Cold Condition in Mice. Front Physiol 2017; 8:1032. [PMID: 29311966 PMCID: PMC5742148 DOI: 10.3389/fphys.2017.01032] [Citation(s) in RCA: 22] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2017] [Accepted: 11/28/2017] [Indexed: 02/04/2023] Open
Abstract
Background: Perivascular adipose tissue (PVAT), which surrounds most vessels, is de facto a distinct functional vascular layer actively contributing to vascular function and dysfunction. PVAT contributes to aortic remodeling by producing and releasing a large number of undetermined or less characterized factors that could target endothelial cells and vascular smooth muscle cells, and herein contribute to the maintenance of vessel homeostasis. Loss of PVAT in mice enhances atherosclerosis, but a causal relationship between PVAT and atherosclerosis and the possible underlying mechanisms remain to be addressed. The CDGSH iron sulfur domain 1 protein (referred to as mitoNEET), a mitochondrial outer membrane protein, regulates oxidative capacity and adipose tissue browning. The roles of mitoNEET in PVAT, especially in the development of atherosclerosis, are unknown. Methods: The brown adipocyte-specific mitoNEET transgenic mice were subjected to cold environmental stimulus. The metabolic rates and PVAT-dependent thermogenesis were investigated. Additionally, the brown adipocyte-specific mitoNEET transgenic mice were cross-bred with ApoE knockout mice. The ensuing mice were subsequently subjected to cold environmental stimulus and high cholesterol diet challenge for 3 months. The development of atherosclerosis was investigated. Results: Our data show that mitoNEET mRNA was downregulated in PVAT of both peroxisome proliferator-activated receptor gamma coactivator 1-alpha (Pgc1α)- and beta (Pgc1β)-knockout mice which are sensitive to cold. MitoNEET expression was higher in PVAT of wild type mice and increased upon cold stimulus. Transgenic mice with overexpression of mitoNEET in PVAT were cold resistant, and showed increased expression of thermogenic genes. ApoE knockout mice with mitoNEET overexpression in PVAT showed significant downregulation of inflammatory genes and showed reduced atherosclerosis development upon high fat diet feeding when kept in a 16°C environment. Conclusion: mitoNEET in PVAT is associated with PVAT-dependent thermogenesis and prevents atherosclerosis development. The results of this study provide new insights on PVAT and mitoNEET biology and atherosclerosis in cardiovascular diseases.
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Affiliation(s)
- Wenhao Xiong
- Key Laboratory for Atherosclerology of Hunan Province, Institute of Cardiovascular Disease, University of South China, Hengyang, China.,Cardiovascular Research Center, University of Michigan, Ann Arbor, MI, United States
| | - Xiangjie Zhao
- Cardiovascular Research Center, University of Michigan, Ann Arbor, MI, United States
| | | | - Jifeng Zhang
- Cardiovascular Research Center, University of Michigan, Ann Arbor, MI, United States
| | - Jiandie Lin
- Life Science Institute, University of Michigan, Ann Arbor, MI, United States
| | - Y Eugene Chen
- Department of Cardiac Surgery, University of Michigan, Ann Arbor, MI, United States
| | - Zhisheng Jiang
- Key Laboratory for Atherosclerology of Hunan Province, Institute of Cardiovascular Disease, University of South China, Hengyang, China
| | - Lin Chang
- Cardiovascular Research Center, University of Michigan, Ann Arbor, MI, United States
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Gertow J, Ng CZ, Mamede Branca RM, Werngren O, Du L, Kjellqvist S, Hemmingsson P, Bruchfeld A, MacLaughlin H, Eriksson P, Axelsson J, Fisher RM. Altered Protein Composition of Subcutaneous Adipose Tissue in Chronic Kidney Disease. Kidney Int Rep 2017; 2:1208-1218. [PMID: 29270529 PMCID: PMC5733748 DOI: 10.1016/j.ekir.2017.07.007] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2017] [Revised: 06/30/2017] [Accepted: 07/24/2017] [Indexed: 12/26/2022] Open
Abstract
Introduction Loss of renal function is associated with high mortality from cardiovascular disease (CVD). Patients with chronic kidney disease (CKD) have altered circulating adipokine and nonesterified fatty acid concentrations and insulin resistance, which are features of disturbed adipose tissue metabolism. Because dysfunctional adipose tissue contributes to the development of CVD, we hypothesize that adipose tissue dysfunctionality in patients with CKD could explain, at least in part, their high rates of CVD. Therefore we characterized adipose tissue from patients with CKD, in comparison to healthy controls, to search for signs of dysfunctionality. Methods Biopsy samples of subcutaneous adipose tissue from 16 CKD patients and 11 healthy controls were analyzed for inflammation, fibrosis, and adipocyte size. Protein composition was assessed using 2-dimensional gel proteomics combined with multivariate analysis. Results Adipose tissue of CKD patients contained significantly more CD68-positive cells, but collagen content did not differ. Adipocyte size was significantly smaller in CKD patients. Proteomic analysis of adipose tissue revealed significant differences in the expression of certain proteins between the groups. Proteins whose expression differed the most were α-1-microglobulin/bikunin precursor (AMBP, higher in CKD) and vimentin (lower in CKD). Vimentin is a lipid droplet−associated protein, and changes in its expression may impair fatty acid storage/mobilization in adipose tissue, whereas high levels of AMBP may reflect oxidative stress. Discussion These findings demonstrate that adipose tissue of CKD patients shows signs of inflammation and disturbed functionality, thus potentially contributing to the unfavorable metabolic profile and increased risk of CVD in these patients.
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Affiliation(s)
- Joanna Gertow
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Chang Zhi Ng
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Rui Miguel Mamede Branca
- Clinical Proteomics Mass Spectrometry, Department of Oncology-Pathology, Science For Life Laboratory and Karolinska Institutet, Stockholm, Sweden
| | - Olivera Werngren
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Lei Du
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Sanela Kjellqvist
- Department of Biochemistry and Biophysics, Science for Life Laboratory, Stockholm University, Stockholm, Sweden
| | - Peter Hemmingsson
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
| | - Annette Bruchfeld
- Department of Clinical Science, Intervention and Technology (CLINTEC), Karolinska Institutet, Stockholm, Sweden
| | - Helen MacLaughlin
- Division of Diabetes and Nutritional Sciences, King’s College London and King’s College Hospital, London, United Kingdom
| | - Per Eriksson
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Jonas Axelsson
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
| | - Rachel M. Fisher
- Cardiovascular Medicine Unit, Department of Medicine Solna, Center for Molecular Medicine, Karolinska Institutet, Stockholm, Sweden
- Correspondence: Rachel M. Fisher, Cardiovascular Medicine Unit, Department of Medicine Solna, Karolinska Institutet, Center for Molecular Medicine, Karolinska University Hospital (L8:03), 171 76 Stockholm, Sweden.Cardiovascular Medicine UnitDepartment of Medicine SolnaKarolinska InstitutetCenter for Molecular MedicineKarolinska University Hospital (L8:03)171 76 StockholmSweden
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28
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Fuster JJ, Ouchi N, Gokce N, Walsh K. Obesity-Induced Changes in Adipose Tissue Microenvironment and Their Impact on Cardiovascular Disease. Circ Res 2017; 118:1786-807. [PMID: 27230642 DOI: 10.1161/circresaha.115.306885] [Citation(s) in RCA: 414] [Impact Index Per Article: 59.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Accepted: 02/16/2016] [Indexed: 02/07/2023]
Abstract
Obesity is causally linked with the development of cardiovascular disorders. Accumulating evidence indicates that cardiovascular disease is the collateral damage of obesity-driven adipose tissue dysfunction that promotes a chronic inflammatory state within the organism. Adipose tissues secrete bioactive substances, referred to as adipokines, which largely function as modulators of inflammation. The microenvironment of adipose tissue will affect the adipokine secretome, having actions on remote tissues. Obesity typically leads to the upregulation of proinflammatory adipokines and the downregulation of anti-inflammatory adipokines, thereby contributing to the pathogenesis of cardiovascular diseases. In this review, we focus on the microenvironment of adipose tissue and how it influences cardiovascular disorders, including atherosclerosis and ischemic heart diseases, through the systemic actions of adipokines.
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Affiliation(s)
- José J Fuster
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.).
| | - Noriyuki Ouchi
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.)
| | - Noyan Gokce
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.)
| | - Kenneth Walsh
- From the Whitaker Cardiovascular Institute, Boston University School of Medicine, Boston, MA (J.J.F., N.G., K.W.); and Department of Molecular Cardiology, Nagoya University School of Medicine, Nagoya, Japan (N.O.).
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29
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Shaw MK, Tse KY, Zhao X, Welch K, Eitzman DT, Thipparthi RR, Montgomery PC, Thummel R, Tse HY. T-Cells Specific for a Self-Peptide of ApoB-100 Exacerbate Aortic Atheroma in Murine Atherosclerosis. Front Immunol 2017; 8:95. [PMID: 28280493 PMCID: PMC5322236 DOI: 10.3389/fimmu.2017.00095] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/11/2016] [Accepted: 01/19/2017] [Indexed: 12/31/2022] Open
Abstract
On the basis of mouse I-Ab-binding motifs, two sequences of the murine apolipoprotein B-100 (mApoB-100), mApoB-1003501–3515 (designated P3) and mApoB-100978–992 (designated P6), were found to be immunogenic. In this report, we show that P6 is also atherogenic. Immunization of Apoe−/− mice fed a high-fat diet (HFD) with P6 resulted in enhanced development of aortic atheroma as compared to control mice immunized with an irrelevant peptide MOG35–55 or with complete Freund’s adjuvant alone. Adoptive transfer of lymph node cells from P6-immunized donor mice to recipients fed an HFD caused exacerbated aortic atheromas, correlating P6-primed cells with disease development. Finally, P6-specific T cell clones were generated and adoptive transfer of T cell clones into recipients fed an HFD led to significant increase in aortic plaque coverage when compared to control animals receiving a MOG35–55-specific T cell line. Recipient mice not fed an HFD, however, did not exhibit such enhancement, indicating that an inflammatory environment facilitated the atherogenic activity of P6-specific T cells. That P6 is identical to or cross-reacts with a naturally processed peptide of ApoB-100 is evidenced by the ability of P6 to stimulate the proliferation of T cells in the lymph node of mice primed by full-length human ApoB-100. By identifying an atherogenic T cell epitope of ApoB-100 and establishing specific T cell clones, our studies open up new and hitherto unavailable avenues to study the nature of atherogenic T cells and their functions in the atherosclerotic disease process.
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Affiliation(s)
- Michael K Shaw
- Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, MI, USA; Department of Research and Clinical Trials, St. John-Providence Health System, Macomb-Oakland Hospital, Warren, MI, USA
| | - Kevin Y Tse
- Division of Rheumatology, Allergy and Immunology, Department of Internal Medicine, University of California at San Diego Medical Center, La Jolla, CA, USA; Division of Inflammation Biology, La Jolla Institute for Allergy and Immunology, La Jolla, CA, USA
| | - Xiaoqing Zhao
- Department of Immunology and Microbiology, Wayne State University School of Medicine , Detroit, MI , USA
| | - Kathryn Welch
- Department of Immunology and Microbiology, Wayne State University School of Medicine , Detroit, MI , USA
| | - Daniel T Eitzman
- Cardiovascular Medicine, University of Michigan Cardiovascular Center , Ann Arbor, MI , USA
| | - Raghavendar R Thipparthi
- Department of Immunology and Microbiology, Wayne State University School of Medicine , Detroit, MI , USA
| | - Paul C Montgomery
- Department of Immunology and Microbiology, Wayne State University School of Medicine , Detroit, MI , USA
| | - Ryan Thummel
- Department of Anatomy and Cell Biology, Wayne State University School of Medicine , Detroit, MI , USA
| | - Harley Y Tse
- Department of Immunology and Microbiology, Wayne State University School of Medicine, Detroit, MI, USA; Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI, USA
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Abstract
MicroRNAs (miRs) hybridize with complementary sequences in mRNA and silence genes by destabilizing mRNA or preventing translation of mRNA. Over 60% of human protein-coding genes are regulated by miRs, and 1881 high-confidence miRs are encoded in the human genome. Evidence suggests that miRs not only are synthesized endogenously, but also might be obtained from dietary sources, and that food compounds alter the expression of endogenous miR genes. The main food matrices for studies of biological activity of dietary miRs include plant foods and cow milk. Encapsulation of miRs in exosomes and exosome-like particles confers protection against RNA degradation and creates a pathway for intestinal and vascular endothelial transport by endocytosis, as well as delivery to peripheral tissues. Evidence suggests that the amount of miRs absorbed from nutritionally relevant quantities of foods is sufficient to elicit biological effects, and that endogenous synthesis of miRs is insufficient to compensate for dietary miR depletion and rescue wild-type phenotypes. In addition, nutrition alters the expression of endogenous miR genes, thereby compounding the effects of nutrition-miR interactions in gene regulation and disease diagnosis in liquid biopsies. For example, food components and dietary preferences may modulate serum miR profiles that may influence biological processes. The complex crosstalk between nutrition, miRs, and gene targets poses a challenge to gene network analysis and studies of human disease. Novel pipelines and databases have been developed recently, including a dietary miR database for archiving reported miRs in 15 dietary resources. miRs derived from diet and endogenous synthesis have been implicated in physiologic and pathologic conditions, including those linked with nutrition and metabolism. In fact, several miRs are actively regulated in response to overnutrition and tissue inflammation, and are involved in facilitating the development of chronic inflammation by modulating tissue-infiltrated immune cell function.
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Affiliation(s)
- Juan Cui
- Department of Computer Science and Engineering and
| | - Beiyan Zhou
- Department of Immunology, University of Connecticut Health Center, Farmington, CT; and
| | - Sharon A Ross
- Nutritional Science Research Group, Division of Cancer Prevention, National Cancer Institute, NIH, Department of Health and Human Services, Bethesda, MD
| | - Janos Zempleni
- Department of Nutrition and Health Sciences, University of Nebraska-Lincoln, Lincoln, NE;
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Autieri MV. Adipose inflammation at the heart of vascular disease. Clin Sci (Lond) 2016; 130:2101-2104. [PMID: 27729474 PMCID: PMC6339250 DOI: 10.1042/cs20160628] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/10/2016] [Accepted: 09/09/2016] [Indexed: 01/13/2023]
Abstract
Visceral adipose tissue is a primary site of chronic inflammation in obesity and may contribute to systemic inflammation and development of atherosclerotic vascular disease. Few studies identify molecular mechanisms and secretory pathways which mediate this process. In this edition of Clinical Science, Kwok et al. utilize a transgenic mouse in which dominant-negative c-Jun NH2 terminal kinase (dnJNK) expression is restricted to adipose tissue to implicate JNK-driven expression of adipocyte fatty acid binding protein (A-FABP) in visceral adipose tissue as a key secretory pathway to exacerbate development of atherosclerosis in ApoE-/- mice. They further demonstrate that ApoE-/- mice transplanted with visceral adipose tissue in which JNK has been inactivated display less systemic inflammation and develop significantly less atherosclerosis compared with control mice. Together, the findings of the present study reinforce our understanding of visceral adipose tissue as a secretory organ and the importance of the JNK/A-FABP pathway in mediating adipose vascular cross-talk and exacerbation of atherosclerosis.
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Affiliation(s)
- Michael V Autieri
- Department of Physiology, Independence Blue Cross Cardiovascular Research Center, Lewis Katz School of Medicine at Temple University, Philadelphia, PA 19140, U.S.A.
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Seven E, Thuesen BH, Linneberg A, Jeppesen JL. Abdominal Adiposity Distribution Quantified by Ultrasound Imaging and Incident Hypertension in a General Population. Hypertension 2016; 68:1115-1122. [DOI: 10.1161/hypertensionaha.116.07306] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2016] [Accepted: 08/12/2016] [Indexed: 01/04/2023]
Abstract
Abdominal obesity is a major risk factor for hypertension. However, different distributions of abdominal adipose tissue may affect hypertension risk differently. The main purpose of this study was to explore the association of subcutaneous abdominal adipose tissue (SAT) and visceral adipose tissue (VAT) with incident hypertension in a population-based setting. We hypothesized that VAT, rather than SAT, would be associated with incident hypertension. VAT and SAT were determined by ultrasound imagining in 3363 randomly selected Danes (mean age 49 years, 56% women, mean body mass index 25.8 kg/m
2
). We constructed multiple logistic regression models to compute standardized odds ratios with 95% confidence intervals per SD increase in SAT and VAT. Of the 2119 normotensive participants at baseline, 1432, with mean SAT of 2.8 cm and mean VAT of 5.7 cm, returned 5 years later for a follow-up examination and among them 203 had developed hypertension. In models including both VAT and SAT, the Framingham Hypertension Risk Score variables (age, sex, smoking status, family history of hypertension, and baseline blood pressure) and glycated hemoglobin, odds ratio (95% confidence interval) for incident hypertension for 1 SD increase in VAT and SAT was 1.27 (1.08–1.50,
P
=0.004) and 0.97 (0.81–1.15,
P
=0.70), respectively. Adjusting for body mass index instead of SAT attenuated the association between VAT and incident hypertension, but it was still significant (odds ratio, 1.22 [1.01–1.48,
P
=0.041] for each SD increase in VAT). In conclusion, ultrasound-determined VAT, but not SAT, was associated with incident hypertension in a random sample of Danish adults.
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Affiliation(s)
- Ekim Seven
- From the Research Centre for Prevention and Health, The Capital Region of Denmark, Copenhagen (E.S., B.H.T., A.L.); Department of Internal Medicine, Hvidovre Hospital Glostrup, University of Copenhagen, Glostrup, Denmark (E.S., J.L.J.); Department of Clinical Experimental Research, Rigshospitalet, Denmark (A.L.); and Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (A.L., J.L.J.)
| | - Betina H. Thuesen
- From the Research Centre for Prevention and Health, The Capital Region of Denmark, Copenhagen (E.S., B.H.T., A.L.); Department of Internal Medicine, Hvidovre Hospital Glostrup, University of Copenhagen, Glostrup, Denmark (E.S., J.L.J.); Department of Clinical Experimental Research, Rigshospitalet, Denmark (A.L.); and Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (A.L., J.L.J.)
| | - Allan Linneberg
- From the Research Centre for Prevention and Health, The Capital Region of Denmark, Copenhagen (E.S., B.H.T., A.L.); Department of Internal Medicine, Hvidovre Hospital Glostrup, University of Copenhagen, Glostrup, Denmark (E.S., J.L.J.); Department of Clinical Experimental Research, Rigshospitalet, Denmark (A.L.); and Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (A.L., J.L.J.)
| | - Jørgen L. Jeppesen
- From the Research Centre for Prevention and Health, The Capital Region of Denmark, Copenhagen (E.S., B.H.T., A.L.); Department of Internal Medicine, Hvidovre Hospital Glostrup, University of Copenhagen, Glostrup, Denmark (E.S., J.L.J.); Department of Clinical Experimental Research, Rigshospitalet, Denmark (A.L.); and Department of Clinical Medicine, Faculty of Health and Medical Sciences, University of Copenhagen, Denmark (A.L., J.L.J.)
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33
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Adipose-specific inactivation of JNK alleviates atherosclerosis in apoE-deficient mice. Clin Sci (Lond) 2016; 130:2087-2100. [DOI: 10.1042/cs20160465] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2016] [Accepted: 08/10/2016] [Indexed: 02/05/2023]
Abstract
Both atherosclerosis and obesity, an independent atherosclerotic risk factor, are associated with enhanced systemic inflammation. Obesity is also characterized by increased adipose tissue inflammation. However, the molecular mechanism underlying the accelerated atherosclerosis in obesity remains unclear. In obesity, activation of c-Jun N-terminal kinase (JNK) contributes to adipose tissue inflammation. The present study investigated whether the suppression of fat inflammation through adipose-specific JNK inactivation could protect against atherosclerosis in mice. ApoE−/− mice were cross-bred with transgenic mice with adipose-specific expression of a dominant negative form of JNK (dnJNK) to generate apoE−/−/dnJNK (ADJ) mice. ADJ mice treated with a high-fat–high-cholesterol diet exhibited significant attenuations of visceral fat and systemic inflammation without changes in lipid or glucose metabolism, and were protected against atherosclerosis, when compared with apoE−/− mice. Lean apoE−/− mice that received transplantation of visceral fat from obese wild-type donor mice for 4 weeks showed exacerbated systemic inflammation and atherosclerotic plaque formation. Conversely, apoE−/− recipients carrying a visceral fat graft from obese dnJNK donors were protected against enhanced systemic inflammation and atherogenesis. The beneficial effects of adipose-specific JNK inactivation on atherogenesis in apoE−/− recipients were significantly compromised by continuous infusion of recombinant adipocyte–fatty acid-binding protein (A-FABP), previously shown to interact with JNK via a positive feedback loop to modulate inflammatory responses. Together these data suggested that enhanced atherosclerosis in obesity can be attributed, at least in part, to a distant cross-talk between visceral fat and the vasculature, mediated by the release of proinflammatory cytokines, such as A-FABP, from the inflamed visceral adipose tissue with JNK activation.
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Savill SA, Leitch HF, Harvey JN, Thomas TH. Inflammatory Adipokines Decrease Expression of Two High Molecular Weight Isoforms of Tropomyosin Similar to the Change in Type 2 Diabetic Patients. PLoS One 2016; 11:e0162908. [PMID: 27649540 PMCID: PMC5029944 DOI: 10.1371/journal.pone.0162908] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 08/30/2016] [Indexed: 01/04/2023] Open
Abstract
Cardiovascular disease and cancer are increased in Type 2 diabetes. TPM1 and TPM4 genes encode proteins associated with cardiovascular and neoplastic disease. High (HMW) and low (LMW) molecular weight isoforms from TPM1 and TPM4 are altered in several cancer cells and the 3'UTR of TPM1 mRNA is tumour suppressive. Leukocytes influence cardiovascular and neoplastic disease by immunosurveillance for cancer and by chronic inflammation in Type 2 diabetes and cardiovascular disease. The aim was to determine changes in expression of isoforms from TPM1 and TPM4 genes in leukocytes from Type 2 diabetic patients and to use the leukocyte cell line THP1 to identify possible mediators of changes in the patients. Gene expression was determined by RT-qPCR. In diabetes, expression of HMW isoforms from TPM1 were markedly decreased (0.55 v 1.00; p = 0.019) but HMW isoforms from TPM4 were not significantly different (0.76 v 1.00; p = 0.205). Within individual variance in expression of HMW isoforms was very high. The change in expression in HMW isoforms from TPM1 and TPM4 was replicated in THP1 cells treated with 1 ng/ml TNFα (0.10 and 0.12 v 1.00 respectively) or 10 ng/ml IL-1α (0.17 and 0.14 v 1.00 respectively). Increased insulin or glucose concentrations had no substantial effects on TPM1 or TPM4 expression. Decreased TPM1 mRNA resulted in decreases in HMW protein levels. Expression of HMW isoforms from TPM1 is decreased in Type 2 diabetes. This is probably due to increased levels of inflammatory cytokines TNFα and IL-1α in Type 2 diabetes. Lower levels of TPM1 mRNA reduce tumour suppression and could contribute to increased cancer risk in Type 2 diabetes. Decreased HMW tropomyosin isoforms are associated with cancer. Decreased HMW isoforms give rise to cells that are more plastic, motile, invasive and prone to dedifferentiation resulting in leukocytes that are more invasive but less functionally effective.
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Affiliation(s)
- Stuart A. Savill
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
- * E-mail:
| | - Helen F. Leitch
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
| | - John N. Harvey
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
- School of Medical Sciences, Wrexham Academic Unit, Bangor University, Bangor, United Kingdom
| | - Trevor H. Thomas
- Betsi Cadwaladr University Health Board, Croesnewydd Road, Wrexham, United Kingdom
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Kim B, Lee SG, Park YK, Ku CS, Pham TX, Wegner CJ, Yang Y, Koo SI, Chun OK, Lee JY. Blueberry, blackberry, and blackcurrant differentially affect plasma lipids and pro-inflammatory markers in diet-induced obesity mice. Nutr Res Pract 2016; 10:494-500. [PMID: 27698956 PMCID: PMC5037066 DOI: 10.4162/nrp.2016.10.5.494] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 03/16/2016] [Accepted: 06/21/2016] [Indexed: 01/06/2023] Open
Abstract
BACKGROUND/OBJECTIVES Evidence indicates that berry anthocyanins are anti-atherogenic, antioxidant, and anti-inflammatory. However, berries differ vastly in their anthocyanin composition and thus potentially in their biological and metabolic effects. The present study compared hypolipidemic, antioxidant, and anti-inflammatory properties of blueberry (BB), blackberry (BK), and blackcurrant (BC) in a diet-induced obesity (DIO) mouse model. MATERIALS/METHODS Male C57BL/6J mice were fed a high fat (HF; 35% fat, w/w) control diet or a HF diet supplemented with freeze-dried 5% BB, 6.3% BK or 5.7% BC for 12 weeks (10 mice/group) to achieve the same total anthocyanin content in each diet. Plasma lipids, antioxidant status and pro-inflammatory cytokines were measured. The expression of genes involved in antioxidant defense, inflammation, and lipid metabolism was determined in the liver, epididymal adipose tissue, proximal intestine, and skeletal muscle. Histological analysis was performed to identify crown-like structure (CLS) in epididymal fat pads to determine macrophage infiltration. RESULTS No differences were noted between the control and any berry-fed groups in plasma levels of liver enzymes, insulin, glucose, ferric reducing antioxidant power, superoxide dismutase, and tumor necrosis factor α. However, BK significantly lowered plasma triglyceride compared with the HF control and other berries, whereas BC significantly reduced F4/80 mRNA and the number of CLS in the epididymal fat pad, indicative of less macrophage infiltration. CONCLUSIONS The present study provides evidence that BB, BK and BC with varying anthocyanin composition differentially affect plasma lipids and adipose macrophage infiltration in DIO mice, but with no differences in their antioxidant capacity and anti-inflammatory potential.
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Affiliation(s)
- Bohkyung Kim
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Sang Gil Lee
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Young-Ki Park
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Chai Siah Ku
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Tho X Pham
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Casey J Wegner
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Yue Yang
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Sung I Koo
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Ock K Chun
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
| | - Ji-Young Lee
- Department of Nutritional Sciences, University of Connecticut, Storrs, CT 06269, USA
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Glucose and Palmitate Differentially Regulate PFKFB3/iPFK2 and Inflammatory Responses in Mouse Intestinal Epithelial Cells. Sci Rep 2016; 6:28963. [PMID: 27387960 PMCID: PMC4937440 DOI: 10.1038/srep28963] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2016] [Accepted: 06/07/2016] [Indexed: 12/21/2022] Open
Abstract
The gene PFKFB3 encodes for inducible 6-phosphofructo-2-kinase, a glycolysis-regulatory enzyme that protects against diet-induced intestine inflammation. However, it is unclear how nutrient overload regulates PFKFB3 expression and inflammatory responses in intestinal epithelial cells (IECs). In the present study, primary IECs were isolated from small intestine of C57BL/6J mice fed a low-fat diet (LFD) or high-fat diet (HFD) for 12 weeks. Additionally, CMT-93 cells, a cell line for IECs, were cultured in low glucose (LG, 5.5 mmol/L) or high glucose (HG, 27.5 mmol/L) medium and treated with palmitate (50 μmol/L) or bovine serum albumin (BSA) for 24 hr. These cells were analyzed for PFKFB3 and inflammatory markers. Compared with LFD, HFD feeding decreased IEC PFKFB3 expression and increased IEC proinflammatory responses. In CMT-93 cells, HG significantly increased PFKFB3 expression and proinflammatory responses compared with LG. Interestingly, palmitate decreased PFKFB3 expression and increased proinflammatory responses compared with BSA, regardless of glucose concentrations. Furthermore, HG significantly increased PFKFB3 promoter transcription activity compared with LG. Upon PFKFB3 overexpression, proinflammatory responses in CMT-93 cells were decreased. Taken together, these results indicate that in IECs glucose stimulates PFKFB3 expression and palmitate contributes to increased proinflammatory responses. Therefore, PFKFB3 regulates IEC inflammatory status in response to macronutrients.
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37
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Adiponectin improves NF-κB-mediated inflammation and abates atherosclerosis progression in apolipoprotein E-deficient mice. Lipids Health Dis 2016; 15:33. [PMID: 26965176 PMCID: PMC4787184 DOI: 10.1186/s12944-016-0202-y] [Citation(s) in RCA: 67] [Impact Index Per Article: 8.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2015] [Accepted: 02/10/2016] [Indexed: 01/26/2023] Open
Abstract
Background Atherosclerosis is a common pathological basis of cardiovascular disease. Adiponectin (APN) has been shown to have an anti-atherosclerosis effect, and the underlying mechanisms, however, are largely unknown. Nuclear factor κB (NF-κB) has also been regarded as a proatherogenic factor, mainly because of its regulation of a variety of the proinflammatory genes linked to atherosclerosis. It was hypothesized that the inhibitory effects of adiponectin on the atherosclerosis is through the inhibition of NF-κB signaling pathway. Methods We injected adenovirus of Ad-eGFP virus (control group) or the same amount of Ad-APN-eGFP virus (APN group) in ApoE-/- mice tail-intravenously. Blood samples and aorta were executed at 0 day, 4, and 8 week of high-fat diet feeding. Histopathological changes of aortic arch root were detected. Levels of TC, TG, HDL-C, LDL-C were measured. Adiponectin and Matrix metalloproteinases-9 (MMP-9) concentration were detected by enzyme-linked immunosorbent assay. Gene and protein levels of adiponectin, eNOS, IL-6, MCP-1,VCAM-1, and other inflammatory factors were determined. Adiponectin, NF-κB p65 in aortic arch root were determined by immunofluorescence and western blot. Results Transduction of Ad-APN inhibited the formation of atherosclerotic plaque in aorta when compared with control group. The lesion formation in aortic arch root was inhibited significantly (P < 0.01). Lesion lumen ratio decreased significantly (P < 0.001). The expression of adiponectin attenuated the increases of serum TC (P < 0.001), TG (P < 0.001), and LDL-C (P < 0.001) induced by the high-fat diet, and the increase in body weight (P < 0.05). As increasing serum adiponectin, the levels of MMP-9 were significantly decreased (P < 0.05). The exogenous adiponectin increased the gene expression of the anti-inflammatory factors eNOS (P < 0.05) and IL-10 (P < 0.001), and reduced the gene expression of inflammatory factors tumor necrosis factor-α (TNF-α) (P < 0.001), IL-6 (P < 0.001), VCAM-1 (P < 0.05), respectively. Adiponectin effectively inhibited the activation of NF-κB pathway and the expression of NF-κB nuclear protein p65. Conclusions Adiponectin may protect the aorta from atherosclerotic injury by reducing inflammation. The molecular mechanism may involve inhibited the expression of downstream components of NF-κB and its transcription factors.
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38
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Identification of Mouse Mesenteric and Subcutaneous in vitro Adipogenic Cells. Sci Rep 2016; 6:21041. [PMID: 26884347 PMCID: PMC4756711 DOI: 10.1038/srep21041] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2015] [Accepted: 01/15/2016] [Indexed: 02/06/2023] Open
Abstract
Fat accumulation and the dysfunction of visceral white adipose tissue (WAT), but not subcutaneous WAT, cause abnormalities in whole body metabolic homeostasis. However, no current drugs specifically target visceral WAT. The primary reason for this is that a practical in vitro culture system for mesenteric adipocytes has not been established. To resolve this issue, we sought to identify in vitro adipogenic cells in mesenteric and subcutaneous WATs. First, we examined the expression pattern of surface antigens in stromal-vascular fraction (SVF) cells from mouse mesenteric and subcutaneous WATs, and found the expression of 30 stem cell-related surface antigens. Then, to evaluate the adipogenic ability of each fraction, we performed in vitro screening, and identified five candidate markers for mesenteric adipogenic cells and one candidate marker for subcutaneous adipogenic cells. To investigate whether in vitro adipogenic ability accurately reflects the conditions in vivo, we performed transplantation experiments, and identified CD9(-) CD201(+) Sca-1(-) cells and CD90(+) cells as mesenteric and subcutaneous in vitro adipogenic cells, respectively. Furthermore, mature adipocytes derived from mesenteric and subcutaneous adipogenic cells maintained each characteristic phenotype in vitro. Thus, our study should contribute to the development of a useful culture system for visceral adipocytes.
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39
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Ying W, Tseng A, Chang RCA, Wang H, Lin YL, Kanameni S, Brehm T, Morin A, Jones B, Splawn T, Criscitiello M, Golding MC, Bazer FW, Safe S, Zhou B. miR-150 regulates obesity-associated insulin resistance by controlling B cell functions. Sci Rep 2016; 6:20176. [PMID: 26833392 PMCID: PMC4735333 DOI: 10.1038/srep20176] [Citation(s) in RCA: 51] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2015] [Accepted: 12/23/2015] [Indexed: 01/13/2023] Open
Abstract
Adipose tissue resident B cells account for more than 20% of stromal cells within visceral adipose tissues; however, their functions in the adipose tissue niche are poorly elucidated. Here we report that miR-150 modulates adipose tissue function by controlling activation of B cells and their interactions with other immune cells. miR-150KO mice displayed exacerbated obesity-associated tissue inflammation and systemic insulin resistance, which is recapitulated by adoptive transfer of B cells, but not purified immunoglobulin, into obese Bnull mice. Using purified cell populations, we found that enhanced proinflammatory activation of adipose tissue T cells and macrophages was due to miR-150KO B cells action but not cell-autologous mechanisms. miR-150KO B cells displayed significantly enhanced antigen presentation upon stimulation, ultimately leading to elevated inflammation and insulin resistance, compared to wild type B cells. Knockdown of identified miR-150 target genes, Elk1, Etf1 or Myb attenuated B cell action by altering B cell receptor pathways and MHCII cell surface presentation. Our results demonstrate a critical role for miR-150 in regulating B cell functions in adipose tissue which ultimately regulate both metabolic and immunologic homeostasis in the adipose tissue niche.
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Affiliation(s)
- Wei Ying
- Research Center for Translational Medicine, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Alexander Tseng
- College of Medicine, Texas A&M Health Science Center, College Station, TX, USA
| | - Richard Cheng-An Chang
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Haiqing Wang
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Yu-Lieh Lin
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Srikanth Kanameni
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Tyler Brehm
- Department of Chemical Engineering, Texas A&M University, College Station, TX, USA
| | - Andrew Morin
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Benjamin Jones
- Department of Biochemistry and Biophysics, Texas A&M University, College Station, TX, USA
| | - Taylor Splawn
- Department of Agriculture and Life Sciences, Texas A&M University, College Station, TX, USA
| | - Michael Criscitiello
- Department of Veterinary Pathobiology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Michael C Golding
- College of Medicine, Texas A&M Health Science Center, College Station, TX, USA
| | - Fuller W Bazer
- Research Center for Translational Medicine, East Hospital, Tongji University School of Medicine, Shanghai 200120, China
| | - Stephen Safe
- Department of Veterinary Physiology &Pharmacology, College of Veterinary Medicine &Biomedical Sciences, Texas A&M University, College Station, TX, USA
| | - Beiyan Zhou
- Department of Immunology, University of Connecticut Health Center, Farmington, CT, USA
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Hernández-Díaz A, Arana-Martínez JC, Carbó R, Espinosa-Cervantes R, Sánchez-Muñoz F. [Omentin: Role in insulin resistance, inflammation and cardiovascular protection]. ARCHIVOS DE CARDIOLOGIA DE MEXICO 2015; 86:233-43. [PMID: 26778502 DOI: 10.1016/j.acmx.2015.09.010] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2015] [Revised: 08/14/2015] [Accepted: 09/29/2015] [Indexed: 10/22/2022] Open
Abstract
The omentin is an adipokine, which role is due to the capacity of regulate metabolic (insulin sensitivity) and anti-inflammatory activities, thus conferring vascular protection during obesity and diabetes mellitus type 2. By this, it is important to know the mechanisms by which omentin confers cardiovascular protection, with the purpose of establish omentin a possible therapeutic target or molecule on this scenario.
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Affiliation(s)
- Adrián Hernández-Díaz
- Maestría en Farmacología, Escuela Superior de Medicina, Instituto Politécnico Nacional, México, D.F., México; Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F., México
| | - Julio C Arana-Martínez
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F., México
| | - Roxana Carbó
- Departamento de Biomedicina Cardiovascular, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F., México
| | - Román Espinosa-Cervantes
- Departamento de Producción Agrícola y Animal, Universidad Autónoma Metropolitana, Unidad Xochimilco, México, D.F., México
| | - Fausto Sánchez-Muñoz
- Departamento de Inmunología, Instituto Nacional de Cardiología Ignacio Chávez, México, D.F., México.
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Freitas Lima LC, Braga VDA, do Socorro de França Silva M, Cruz JDC, Sousa Santos SH, de Oliveira Monteiro MM, Balarini CDM. Adipokines, diabetes and atherosclerosis: an inflammatory association. Front Physiol 2015; 6:304. [PMID: 26578976 PMCID: PMC4630286 DOI: 10.3389/fphys.2015.00304] [Citation(s) in RCA: 131] [Impact Index Per Article: 14.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/12/2015] [Indexed: 12/20/2022] Open
Abstract
Cardiovascular diseases can be considered the most important cause of death in diabetic population and diabetes can in turn increase the risk of cardiovascular events. Inflammation process is currently recognized as responsible for the development and maintenance of diverse chronic diseases, including diabetes and atherosclerosis. Considering that adipose tissue is an important source of adipokines, which may present anti and proinflammatory effects, the aim of this review is to explore the role of the main adipokines in the pathophysiology of diabetes and atherosclerosis, highlighting the therapeutic options that could arise from the manipulation of these signaling pathways both in humans and in translational models.
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Affiliation(s)
| | - Valdir de Andrade Braga
- Biotechnology Center, Federal University of Paraiba (Universidade Federal da Paraíba)Joao Pessoa, Brazil
| | | | - Josiane de Campos Cruz
- Biotechnology Center, Federal University of Paraiba (Universidade Federal da Paraíba)Joao Pessoa, Brazil
| | - Sérgio H. Sousa Santos
- Biological Sciences Institute, Federal University of Minas GeraisBelo Horizonte, Brazil
- Health Science Post-Graduate Program, State University of Montes ClarosMontes Claros, Brazil
| | | | - Camille de Moura Balarini
- Biotechnology Center, Federal University of Paraiba (Universidade Federal da Paraíba)Joao Pessoa, Brazil
- Health Sciences Center, Federal University of Paraiba (Universidade Federal da Paraíba)Joao Pessoa, Brazil
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Farb MG, Gokce N. Visceral adiposopathy: a vascular perspective. Horm Mol Biol Clin Investig 2015; 21:125-36. [PMID: 25781557 DOI: 10.1515/hmbci-2014-0047] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/23/2014] [Accepted: 02/04/2015] [Indexed: 12/27/2022]
Abstract
Obesity has emerged as one of the most critical health care problems globally that is associated with the development of insulin resistance, type 2 diabetes mellitus, metabolic dysfunction and cardiovascular disease. Central adiposity with intra-abdominal deposition of visceral fat, in particular, has been closely linked to cardiometabolic consequences of obesity. Increasing epidemiological, clinical and experimental data suggest that both adipose tissue quantity and perturbations in its quality termed "adiposopathy" contribute to mechanisms of cardiometabolic disease. The current review discusses regional differences in adipose tissue characteristics and highlights profound abnormalities in vascular endothelial function and angiogenesis that are manifest within the visceral adipose tissue milieu of obese individuals. Clinical data demonstrate up-regulation of pro-inflammatory and pro-atherosclerotic mediators in dysfunctional adipose tissue that may support pathological vascular changes not only locally in fat but also in multiple organ systems, including coronary and peripheral circulations, potentially contributing to mechanisms of obesity-related cardiovascular disease.
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43
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Dobrian AD, Hatcher MA, Brotman JJ, Galkina EV, Taghavie-Moghadam P, Pei H, Haynes BA, Nadler JL. STAT4 contributes to adipose tissue inflammation and atherosclerosis. J Endocrinol 2015; 227:13-24. [PMID: 26285907 PMCID: PMC4811759 DOI: 10.1530/joe-15-0098] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 08/05/2015] [Indexed: 12/14/2022]
Abstract
Adipose tissue (AT) inflammation is an emerging factor contributing to cardiovascular disease. STAT4 is a transcription factor expressed in adipocytes and in immune cells and contributes to AT inflammation and insulin resistance in obesity. The objective of this study was to determine the effect of STAT4 deficiency on visceral and peri-aortic AT inflammation in a model of atherosclerosis without obesity. Stat4(-/-)Apoe(-/-) mice and Apoe(-/-) controls were kept either on chow or Western diet for 12 weeks. Visceral and peri-aortic AT were collected and analyzed for immune composition by flow cytometry and for cytokine/chemokine expression by real-time PCR. Stat4(-/-)Apoe(-/-) and Apoe(-/-) mice had similar body weight, plasma glucose, and lipids. Western diet significantly increased macrophage, CD4+, CD8+, and NK cells in peri-aortic and visceral fat in Apoe(-/-) mice. In contrast, in Stat4(-/-)Apoe(-/-) mice, a Western diet failed to increase the percentage of immune cells infiltrating the AT. Also, IL12p40, TNFa, CCL5, CXCL10, and CX3CL1 were significantly reduced in the peri-aortic fat in Stat4(-/-)Apoe(-/-) mice. Importantly, Stat4(-/-)Apoe(-/-) mice on a Western diet had significantly reduced plaque burden vs Apoe(-/-) controls. In conclusion, STAT4 deletion reduces inflammation in peri-vascular and visceral AT and this may contribute via direct or indirect effects to reduced atheroma formation.
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Affiliation(s)
- A D Dobrian
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - M A Hatcher
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - J J Brotman
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - E V Galkina
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - P Taghavie-Moghadam
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - H Pei
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - B A Haynes
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
| | - J L Nadler
- Departments of Physiological SciencesMicrobiology and Molecular Cell BiologyInternal MedicineEastern Virginia Medical School, 700W Olney Road, Norfolk, Virginia 23505, USADivision of Inflammation BiologyLa Jolla Institute for Allergy and Immunology, San Diego, La Jolla, California, USA
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Roever L, Resende ES, Veloso FC, Diniz ALD, Penha-Silva N, Casella-Filho A, Dourado PMM, Chagas ACP. Perirenal Fat and Association With Metabolic Risk Factors: The Uberlândia Heart Study. Medicine (Baltimore) 2015; 94:e1105. [PMID: 26426603 PMCID: PMC4616820 DOI: 10.1097/md.0000000000001105] [Citation(s) in RCA: 33] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/14/2022] Open
Abstract
Perirenal fat (PRF) is associated with cardiovascular risk factors. Gender differences in the correlations of cardiovascular disease risk factors and PRF in the Brazilian population are lacking.Cross-sectional study with 101 (50.49% men; mean age 56.5 ± 18, range 19-74 years) drawn from the Uberlândia Heart Study underwent ultrasonography assessment of abdominal adipose. For the PRF, a 3.5 MHz transducer was measured in the middle third of the right kidney, with the transducer positioned at the axillary midline. The examinations were always performed by the same examiner. The PRF thickness was examined in relation to waist circumference, blood pressure, and metabolic risk factors. The PRF was significantly associated with the levels of gamma-glutamyl transferase (P < 0.05, r = 0.08), fasting plasma glucose (P < 0.05, r = 0.07), waist circumference (P < 0.05, r = 0.10), and metabolic syndrome (P < 0.001, r = 0.38) in men, and with the levels of fasting plasma glucose (P < 0.05) in women.The PRF was correlated with most cardiovascular risk factors in men and only in glucose at the women.
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Affiliation(s)
- Leonardo Roever
- From the Federal University of Uberlândia (LR, ESR, FCV, ALDD, NPS); Heart Institute (InCor), HCFMUSP, University of São Paulo Medical School, São Paulo (ACF, PMMD, ACPC); and Faculty of Medicine ABC, Santo André, Brazil (ACPC)
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45
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Hocking SL, Stewart RL, Brandon AE, Suryana E, Stuart E, Baldwin EM, Kolumam GA, Modrusan Z, Junutula JR, Gunton JE, Medynskyj M, Blaber SP, Karsten E, Herbert BR, James DE, Cooney GJ, Swarbrick MM. Subcutaneous fat transplantation alleviates diet-induced glucose intolerance and inflammation in mice. Diabetologia 2015; 58:1587-600. [PMID: 25899451 DOI: 10.1007/s00125-015-3583-y] [Citation(s) in RCA: 56] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2014] [Accepted: 03/13/2015] [Indexed: 12/26/2022]
Abstract
AIMS/HYPOTHESIS Adipose tissue (AT) distribution is a major determinant of mortality and morbidity in obesity. In mice, intra-abdominal transplantation of subcutaneous AT (SAT) protects against glucose intolerance and insulin resistance (IR), but the underlying mechanisms are not well understood. METHODS We investigated changes in adipokines, tissue-specific glucose uptake, gene expression and systemic inflammation in male C57BL6/J mice implanted intra-abdominally with either inguinal SAT or epididymal visceral AT (VAT) and fed a high-fat diet (HFD) for up to 17 weeks. RESULTS Glucose tolerance was improved in mice receiving SAT after 6 weeks, and this was not attributable to differences in adiposity, tissue-specific glucose uptake, or plasma leptin or adiponectin concentrations. Instead, SAT transplantation prevented HFD-induced hepatic triacylglycerol accumulation and normalised the expression of hepatic gluconeogenic enzymes. Grafted fat displayed a significant increase in glucose uptake and unexpectedly, an induction of skeletal muscle-specific gene expression. Mice receiving subcutaneous fat also displayed a marked reduction in the plasma concentrations of several proinflammatory cytokines (TNF-α, IL-17, IL-12p70, monocyte chemoattractant protein-1 [MCP-1] and macrophage inflammatory protein-1β [ΜIP-1β]), compared with sham-operated mice. Plasma IL-17 and MIP-1β concentrations were reduced from as early as 4 weeks after transplantation, and differences in plasma TNF-α and IL-17 concentrations predicted glucose tolerance and insulinaemia in the entire cohort of mice (n = 40). In contrast, mice receiving visceral fat transplants were glucose intolerant, with increased hepatic triacylglycerol content and elevated plasma IL-6 concentrations. CONCLUSIONS/INTERPRETATION Intra-abdominal transplantation of subcutaneous fat reverses HFD-induced glucose intolerance, hepatic triacylglycerol accumulation and systemic inflammation in mice.
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Affiliation(s)
- Samantha L Hocking
- Diabetes and Metabolism Division, Garvan Institute of Medical Research, 384 Victoria Street, Darlinghurst, 2010, Sydney, NSW, Australia
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46
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Escande C, Nin V, Pirtskhalava T, Chini CCS, Tchkonia T, Kirkland JL, Chini EN. Deleted in breast cancer 1 limits adipose tissue fat accumulation and plays a key role in the development of metabolic syndrome phenotype. Diabetes 2015; 64:12-22. [PMID: 25053585 PMCID: PMC4274806 DOI: 10.2337/db14-0192] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Obesity is often regarded as the primary cause of metabolic syndrome. However, many lines of evidence suggest that obesity may develop as a protective mechanism against tissue damage during caloric surplus and that it is only when the maximum fat accumulation capacity is reached and fatty acid spillover occurs into to peripheral tissues that metabolic diseases develop. In this regard, identifying the molecular mechanisms that modulate adipocyte fat accumulation and fatty acid spillover is imperative. Here we identify the deleted in breast cancer 1 (DBC1) protein as a key regulator of fat storage capacity of adipocytes. We found that knockout (KO) of DBC1 facilitated fat cell differentiation and lipid accumulation and increased fat storage capacity of adipocytes in vitro and in vivo. This effect resulted in a "healthy obesity" phenotype. DBC1 KO mice fed a high-fat diet, although obese, remained insulin sensitive, had lower free fatty acid in plasma, were protected against atherosclerosis and liver steatosis, and lived longer. We propose that DBC1 is part of the molecular machinery that regulates fat storage capacity in adipocytes and participates in the "turn-off" switch that limits adipocyte fat accumulation and leads to fat spillover into peripheral tissues, leading to the deleterious effects of caloric surplus.
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Affiliation(s)
- Carlos Escande
- Kogod Aging Center, Mayo Clinic, Rochester, MN Department of Anesthesiology, Mayo Clinic, Rochester, MN Institut Pasteur Montevideo, Montevideo, Uruguay
| | - Veronica Nin
- Kogod Aging Center, Mayo Clinic, Rochester, MN Department of Anesthesiology, Mayo Clinic, Rochester, MN
| | | | - Claudia C S Chini
- Kogod Aging Center, Mayo Clinic, Rochester, MN Department of Anesthesiology, Mayo Clinic, Rochester, MN
| | | | | | - Eduardo N Chini
- Kogod Aging Center, Mayo Clinic, Rochester, MN Department of Anesthesiology, Mayo Clinic, Rochester, MN
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Ahmad R, Shihab PK, Thomas R, Alghanim M, Hasan A, Sindhu S, Behbehani K. Increased expression of the interleukin-1 receptor-associated kinase (IRAK)-1 is associated with adipose tissue inflammatory state in obesity. Diabetol Metab Syndr 2015; 7:71. [PMID: 26312071 PMCID: PMC4549832 DOI: 10.1186/s13098-015-0067-7] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/25/2015] [Accepted: 08/18/2015] [Indexed: 12/21/2022] Open
Abstract
BACKGROUND The emerging role of TLR2/4 as immuno-metabolic receptors points to key involvement of TLR/IL-1R/MyD88 pathway in obesity/type-2 diabetes (T2D). IL1R-associated kinase (IRAK)-1 is a critical adapter protein (serine/threonine kinase) of this signaling pathway. The changes in adipose tissue expression of IRAK-1 in obesity/T2D remain unclear. We determined modulations in IRAK-1 gene/protein expression in the subcutaneous adipose tissues from lean, overweight and obese individuals with or without T2D. METHODS A total of 49 non-diabetic (22 obese, 19 overweight and 8 lean) and 42 T2D (31 obese, 9 overweight and 2 lean) adipose tissue samples were obtained by abdominal subcutaneous fat pad biopsy and IRAK-1 expression was determined using real-time RT-PCR, immunohistochemistry, and confocal microscopy. IRAK-1 mRNA expression was compared with adipose tissue proinflammatory mediators (TNF-α, IL-6, IL-18), macrophage markers (CD68, CD11c, CD163), and plasma markers (CCL-5, C-reactive protein, adiponectin, and triglycerides). The data were analyzed using t test, Pearson's correlation, and multiple stepwise linear regression test. RESULTS In non-diabetics, IRAK-1 gene expression was elevated in obese (P = 0.01) and overweight (P = 0.04) as compared with lean individuals and this increase correlated with body mass index (r = 0.45; P = 0.001) and fat percentage (r = 0.36; P = 0.01). In diabetics, IRAK-1 mRNA expression was also higher in obese as compared with lean subjects (P = 0.012). As also shown by immunohistochemistry/confocal microscopy in non-diabetics and by immunohistochemistry in diabetics, IRAK-1 protein expression was higher in obese than overweight and lean adipose tissues. IRAK-1 gene expression correlated positively/significantly with mRNAs of TNF-α (r = 0.46; P = 0.0008), IL-6 (r = 0.30; P = 0.03) and IL-18 (r = 0.31; P = 0.028) in non-diabetics; and only with TNF-α (r = 0.32; P = 0.03) in diabetics. IRAK-1 expression also correlated positively/significantly with CD68 (r = 0.32; P = 0.02), CD11c (r = 0.30; P = 0.03), and CD163 (r = 0.43; P = 0.001) in non-diabetics; and only with CD163 (r = 0.34; P = 0.02) in diabetics. IRAK-1 mRNA levels also correlated with plasma markers including CCL-5 (r = 0.39; P = 0.02), C-reactive protein (r = 0.48; P = 0.005), adiponectin (r = -0.36; P = 0.04), and triglycerides (r = 0.40; P = 0.02) in non-diabetics; and only with triglycerides (r = -0.36; P = 0.04) in diabetics. IRAK-1 expression related with TLR2 (r = 0.39; P = 0.007) and MyD88 (r = 0.36; P = 0.01) in non-diabetics; and MyD88 (r = 0.52; P = 0.0003) in diabetics. CONCLUSIONS The elevated IRAK-1 expression in obese adipose tissue showed consensus with local/circulatory inflammatory signatures and represented as a tissue marker for metabolic inflammation. The data have clinical significance as interventions causing IRAK-1 suppression may alleviate meta-inflammation in obesity/T2D.
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Affiliation(s)
- Rasheed Ahmad
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Puthiyaveetil Kochumon Shihab
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Reeby Thomas
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Munera Alghanim
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Amal Hasan
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Sardar Sindhu
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
| | - Kazem Behbehani
- Laboratory of Immunology & Innovative Cell Therapy, Dasman Diabetes Institute (DDI), P.O. Box 1180, Dasman, 15462 Kuwait City, Kuwait
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Irie D, Kawahito H, Wakana N, Kato T, Kishida S, Kikai M, Ogata T, Ikeda K, Ueyama T, Matoba S, Yamada H. Transplantation of periaortic adipose tissue from angiotensin receptor blocker-treated mice markedly ameliorates atherosclerosis development in apoE–/– mice. J Renin Angiotensin Aldosterone Syst 2014; 16:67-78. [DOI: 10.1177/1470320314552434] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2014] [Accepted: 08/27/2014] [Indexed: 11/16/2022] Open
Affiliation(s)
- Daisuke Irie
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Kawahito
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Noriyuki Wakana
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Taku Kato
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Sou Kishida
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Masakazu Kikai
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Takehiro Ogata
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Koji Ikeda
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Tomomi Ueyama
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Satoaki Matoba
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
| | - Hiroyuki Yamada
- Department of Cardiovascular Medicine, Kyoto Prefectural University of Medicine, Japan
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Wang X, Pu H, Ma C, Jiang T, Wei Q, Zhang C, Duan M, Shou X, Su L, Zhang J, Yang Y. Adiponectin abates atherosclerosis by reducing oxidative stress. Med Sci Monit 2014; 20:1792-800. [PMID: 25275545 PMCID: PMC4196893 DOI: 10.12659/msm.892299] [Citation(s) in RCA: 41] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022] Open
Abstract
Background We investigated whether the anti-atherosclerosis of adiponectin (APN) relates to the reduction of oxidative stress. We observed the overexpression of adiponectin gene with different titers on atherosclerosis (AS) models of high-fat apolipoprotein E-deficient (ApoE−/−) mice. Material/Methods We divided 48 male ApoE−/− mice into 4 groups: control group, high-fat diet group, low adiponectin group, and high adiponectin group. The low and high adiponectin group mice were treated with recombinant adenovirus expressing mice adiponectin (Ad-APN) with low-dose adiponectin 1.0×108 p.f.u. and high-dose adiponectin 5.0×108 p.f.u. via the tail every 2 weeks and given a high-fat diet for the last 8 weeks. On the 14th day after injection, blood samples were obtained from the vena cava. Results Along with increased serum adiponectin, serum superoxide dismutase (SOD) activity increased (P<0.05) and concentration of malondialdehyde (MDA) was decreased (P<0.05). Levels of total cholesterol (TC), triglyceride (TG), and low-density lipoprotein cholesterol (LDL-C) were decreased, especially TC and LDL-C (P<0.05). A real-time fluorescent quantitative polymerase chain reaction test was used to analyze levels of mRNA expression for endothelial nitric oxide synthase (eNOS) and adiponectin in the aorta. Along with increased adiponectin, the mRNA expression of eNOS in the aorta was increased significantly (P<0.05). The lesion formation in the aortic sinus was inhibited by 25% and 31% in the low-APN group and high-APN group, respectively (P<0.05). Along with the increase of adiponectin doses, the damage of atherosclerosis gradually eased. However, the differences between the low-APN group and high-APN group had no statistical significance. Conclusions Adiponectin may protect the aorta from atherosclerosis injury by reducing oxidative stress, reducing lesion formation size in the aortic root and reducing TC, TG, and LDL-C in serum. The molecular mechanism may involve preservation of SOD, reducing MDA in serum, and increasing eNOS and adiponectin mRNA expression in the aorta.
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Affiliation(s)
- Xuemei Wang
- Xinjiang Key Laboratory of Medical Animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Hongwei Pu
- Department of Science and Research Education Center, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Chuang Ma
- Department of Micro-Reconstructive Surgery of Orthopedics Center, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Tao Jiang
- Xinjiang Key Laboratory of Medical Animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Qin Wei
- Xinjiang Key Laboratory of Medical Animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Chun Zhang
- Xinjiang Key Laboratory of Medical Animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Mingjun Duan
- Xinjiang Key Laboratory of Medical animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Xi Shou
- Xinjiang Key Laboratory of Medical Animal Model Research, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
| | - Lipin Su
- College of Basic Medicine, Xinjiang Medical University, Urumqi, China (mainland)
| | - Jianlong Zhang
- College of Basic Medicine, Xinjiang Medical University, Urumqi, China (mainland)
| | - Yining Yang
- Department of Cardiology, First Affiliated Hospital of Xinjiang Medical University, Urumqi, China (mainland)
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Nguyen NLT, Randall J, Banfield BW, Bartness TJ. Central sympathetic innervations to visceral and subcutaneous white adipose tissue. Am J Physiol Regul Integr Comp Physiol 2014; 306:R375-86. [PMID: 24452544 DOI: 10.1152/ajpregu.00552.2013] [Citation(s) in RCA: 71] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/09/2023]
Abstract
There is a link between visceral white adipose tissue (WAT) and the metabolic syndrome in humans, with health improvements produced with small visceral WAT reduction. By contrast, subcutaneous WAT provides a site for lipid storage that is rather innocuous relative to ectopic lipid storage in muscle or liver. The sympathetic nervous system (SNS) is the principal initiator for lipolysis in WAT by mammals. Nothing is known, however, about the central origins of the SNS circuitry innervating the only true visceral WAT in rodents, mesenteric WAT (MWAT), which drains into the hepatic portal vein. We tested whether the central sympathetic circuits to subcutaneous [inguinal WAT (IWAT)] and visceral WAT (MWAT) are separate or shared and whether they possess differential sympathetic drives with food deprivation in Siberian hamsters. Using two isogenic strains of pseudorabies virus, a retrograde transneuronal viral tract tracer within the same hamsters, we found some overlap (∼20-55% doubly infected neurons) between the two circuitries across the neural axis with lesser overlap proximal to the depots (spinal cord and sympathetic chain) and with more neurons involved in the innervation of IWAT than MWAT in some brain regions. Food deprivation triggered a greater sympathetic drive to subcutaneous (IWAT) than visceral (MWAT) depots. Collectively, we demonstrated both shared and separate populations of brain, spinal cord, and sympathetic chain neurons ultimately project to a subcutaneous WAT depot (IWAT) and the only visceral WAT depot in rodents (MWAT). In addition, the lipolytic stimulus of food deprivation only increased SNS drive to subcutaneous fat (IWAT).
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Affiliation(s)
- Ngoc Ly T Nguyen
- Department of Biology, Obesity Reversal Center, Georgia State University, Atlanta, Georgia
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