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Xia W, Li X, Wu Q, Xu A, Zhang L, Xia Z. The importance of caveolin as a target in the prevention and treatment of diabetic cardiomyopathy. Front Immunol 2022; 13:951381. [PMID: 36405687 PMCID: PMC9666770 DOI: 10.3389/fimmu.2022.951381] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2022] [Accepted: 10/21/2022] [Indexed: 08/30/2023] Open
Abstract
The diabetic population has been increasing in the past decades and diabetic cardiomyopathy (DCM), a pathology that is defined by the presence of cardiac remodeling and dysfunction without conventional cardiac risk factors such as hypertension and coronary heart diseases, would eventually lead to fatal heart failure in the absence of effective treatment. Impaired insulin signaling, commonly known as insulin resistance, plays an important role in the development of DCM. A family of integral membrane proteins named caveolins (mainly caveolin-1 and caveolin-3 in the myocardium) and a protein hormone adiponectin (APN) have all been shown to be important for maintaining normal insulin signaling. Abnormalities in caveolins and APN have respectively been demonstrated to cause DCM. This review aims to summarize recent research findings of the roles and mechanisms of caveolins and APN in the development of DCM, and also explore the possible interplay between caveolins and APN.
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Affiliation(s)
- Weiyi Xia
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Guangdong, China
- Department of Orthopaedics and Traumatology, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Xia Li
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Qingping Wu
- Department of Anesthesiology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Aimin Xu
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
| | - Liangqing Zhang
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Guangdong, China
| | - Zhengyuan Xia
- Department of Anesthesiology, Affiliated Hospital of Guangdong Medical University, Guangdong, China
- State Key Laboratory of Pharmaceutical Biotechnology, Department of Medicine, The University of Hong Kong, Hong Kong, Hong Kong SAR, China
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2
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Sharma A, Mah M, Ritchie RH, De Blasio MJ. The adiponectin signalling pathway - A therapeutic target for the cardiac complications of type 2 diabetes? Pharmacol Ther 2021; 232:108008. [PMID: 34610378 DOI: 10.1016/j.pharmthera.2021.108008] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2021] [Revised: 08/17/2021] [Accepted: 09/23/2021] [Indexed: 12/11/2022]
Abstract
Diabetes is associated with an increased risk of heart failure (HF). This is commonly termed diabetic cardiomyopathy and is often characterised by increased cardiac fibrosis, pathological hypertrophy, increased oxidative and endoplasmic reticulum stress as well as diastolic dysfunction. Adiponectin is a cardioprotective adipokine that is downregulated in settings of type 2 diabetes (T2D) and obesity. Furthermore, both adiponectin receptors (AdipoR1 and R2) are also downregulated in these settings which further results in impaired cardiac adiponectin signalling and reduced cardioprotection. In many cardiac pathologies, adiponectin signalling has been shown to protect against cardiac remodelling and lipotoxicity, however its cardioprotective actions in T2D-induced cardiomyopathy remain unresolved. Diabetic cardiomyopathy has historically lacked effective treatment options. In this review, we summarise the current evidence for links between the suppressed adiponectin signalling pathway and cardiac dysfunction, in diabetes. We describe adiponectin receptor-mediated signalling pathways that are normally associated with cardioprotection, as well as current and potential future therapeutic approaches that could target this pathway as possible interventions for diabetic cardiomyopathy.
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Affiliation(s)
- Abhipree Sharma
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Michael Mah
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia
| | - Rebecca H Ritchie
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia; Department of Pharmacology, Monash University, Clayton, VIC 3800, Australia; Department of Medicine, Monash University, Clayton, VIC 3800, Australia
| | - Miles J De Blasio
- Heart Failure Pharmacology, Drug Discovery Biology, Monash Institute of Pharmaceutical Sciences, Monash University, Parkville, VIC 3052, Australia; Department of Pharmacology, Monash University, Clayton, VIC 3800, Australia.
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3
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Exploring Functional Differences between the Right and Left Ventricles to Better Understand Right Ventricular Dysfunction. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2021; 2021:9993060. [PMID: 34497685 PMCID: PMC8421158 DOI: 10.1155/2021/9993060] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/24/2021] [Accepted: 08/04/2021] [Indexed: 12/16/2022]
Abstract
The right and left ventricles have traditionally been studied as individual entities. Furthermore, modifications found in diseased left ventricles are assumed to influence on right ventricle alterations, but the connection is poorly understood. In this review, we describe the differences between ventricles under physiological and pathological conditions. Understanding the mechanisms that differentiate both ventricles would facilitate a more effective use of therapeutics and broaden our knowledge of right ventricle (RV) dysfunction. RV failure is the strongest predictor of mortality in pulmonary arterial hypertension, but at present, there are no definitive therapies directly targeting RV failure. We further explore the current state of drugs and molecules that improve RV failure in experimental therapeutics and clinical trials to treat pulmonary arterial hypertension and provide evidence of their potential benefits in heart failure.
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4
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Vileigas DF, de Souza SLB, Corrêa CR, Silva CCVDA, de Campos DHS, Padovani CR, Cicogna AC. The effects of two types of Western diet on the induction of metabolic syndrome and cardiac remodeling in obese rats. J Nutr Biochem 2021; 92:108625. [PMID: 33705955 DOI: 10.1016/j.jnutbio.2021.108625] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/14/2020] [Revised: 02/02/2021] [Accepted: 02/04/2021] [Indexed: 12/13/2022]
Abstract
Metabolic syndrome (MetS) include obesity as a critical feature and is strongly associated with risk of cardiovascular disease (CVD). Insights into mechanisms involved in the pathophysiology of these clinical manifestations are essential for the development of therapeutic strategies. Thus, Western diets (WD) have been widely employed in diet-induced obesity (DIO) model. However, there are variations in fat and sugar proportions of such diets, making comparisons challenging. We aimed to assess the impact of two types of the WD on metabolic status and cardiac remodeling, to achieve a DIO model that better mimics the human pathogenesis of MetS-induced CVD. Male Wistar rats were distributed into three groups: control diet, Western diet fat (WDF), and Western diet sugar (WDS) for 41 weeks. Metabolic and inflammatory parameters and cardiac changes were characterized. WDF and WDS feeding promoted higher serum triglycerides, glucose intolerance, and insulin resistance, while just WDF presented inflammation in adipose tissue. WDF-fed rats showed increased catalase activity and malondialdehyde (MDA) and carbonyl protein levels, suggesting cardiac oxidative stress, while WDS-fed rats only raised MDA. Both WD equally elevated protein expressions involved in lipid metabolism, but only WDF downregulated the glycolysis pathway. Furthermore, the mechanical myocardial function was impaired in obese rats, being more relevant in WDF. In conclusion, both WD effectively triggered MetS features, although inflammation was detected just on the WDF-fed animals. Moreover, the WDF promoted a more pronounced functional, metabolic, and oxidative cardiac disorder, suggesting to be an adequate model for studying CVD in the scenario of MetS.
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Affiliation(s)
- Danielle Fernandes Vileigas
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil.
| | - Sérgio Luiz Borges de Souza
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Camila Renata Corrêa
- Department of Patology, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | | | | | - Carlos Roberto Padovani
- Department of Biostatistics, Institute of Biosciences, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil
| | - Antonio Carlos Cicogna
- Department of Internal Medicine, Botucatu Medical School, São Paulo State University (UNESP), Botucatu, São Paulo, Brazil.
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5
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Dhandapany PS, Kang S, Kashyap DK, Rajagopal R, Sundaresan NR, Singh R, Thangaraj K, Jayaprakash S, Manjunath CN, Shenthar J, Lebeche D. Adiponectin receptor 1 variants contribute to hypertrophic cardiomyopathy that can be reversed by rapamycin. SCIENCE ADVANCES 2021; 7:eabb3991. [PMID: 33523960 PMCID: PMC7787482 DOI: 10.1126/sciadv.abb3991] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/21/2020] [Accepted: 11/13/2020] [Indexed: 06/12/2023]
Abstract
Hypertrophic cardiomyopathy (HCM) is a heterogeneous genetic heart muscle disease characterized by hypertrophy with preserved or increased ejection fraction in the absence of secondary causes. However, recent studies have demonstrated that a substantial proportion of individuals with HCM also have comorbid diabetes mellitus (~10%). Whether genetic variants may contribute a combined phenotype of HCM and diabetes mellitus is not known. Here, using next-generation sequencing methods, we identified novel and ultrarare variants in adiponectin receptor 1 (ADIPOR1) as risk factors for HCM. Biochemical studies showed that ADIPOR1 variants dysregulate glucose and lipid metabolism and cause cardiac hypertrophy through the p38/mammalian target of rapamycin and/or extracellular signal-regulated kinase pathways. A transgenic mouse model expressing an ADIPOR1 variant displayed cardiomyopathy that recapitulated the cellular findings, and these features were rescued by rapamycin. Our results provide the first evidence that ADIPOR1 variants can cause HCM and provide new insights into ADIPOR1 regulation.
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Affiliation(s)
- Perundurai S Dhandapany
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India.
- The Knight Cardiovascular Institute, Oregon Health and Science University, Portland, OR 97239, USA
- Departments of Medicine, Molecular, and Medical Genetics, Oregon Health and Science University, Portland, OR 97239, USA
| | - Soojeong Kang
- Cardiovascular Research Center, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Deepak K Kashyap
- Centre for Cardiovascular Biology and Disease, Institute for Stem Cell Science and Regenerative Medicine (inStem), Bangalore, India
- CSIR-Center for Cellular and Molecular Biology, Hyderabad, India
| | - Raksha Rajagopal
- Department of Microbiology and Cell Biology, Indian Institute of Science, CV Raman Avenue, Bangalore, India
| | - Nagalingam R Sundaresan
- Department of Microbiology and Cell Biology, Indian Institute of Science, CV Raman Avenue, Bangalore, India
| | - Rajvir Singh
- Cardiovascular Research Center, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA
| | - Kumarasamy Thangaraj
- CSIR-Center for Cellular and Molecular Biology, Hyderabad, India
- Centre for DNA Fingerprinting and Diagnostics (CDFD), Hyderabad, India
| | - Shilpa Jayaprakash
- Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Bengaluru, India
| | - Cholenahally N Manjunath
- Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Bengaluru, India
| | - Jayaprakash Shenthar
- Department of Cardiology, Sri Jayadeva Institute of Cardiovascular Sciences and Research, Bengaluru, India
| | - Djamel Lebeche
- Cardiovascular Research Center, Department of Medicine, Icahn School of Medicine at Mount Sinai, One Gustave L. Levy Place, New York, NY 10029, USA.
- Graduate School of Biological Sciences, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
- Department of Medicine, Diabetes, Obesity, and Metabolism Institute, Icahn School of Medicine at Mount Sinai, New York, NY 10029, USA
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Adipokines and Inflammation: Focus on Cardiovascular Diseases. Int J Mol Sci 2020; 21:ijms21207711. [PMID: 33081064 PMCID: PMC7589803 DOI: 10.3390/ijms21207711] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2020] [Revised: 10/14/2020] [Accepted: 10/16/2020] [Indexed: 02/08/2023] Open
Abstract
It is well established that adipose tissue, apart from its energy storage function, acts as an endocrine organ that produces and secretes a number of bioactive substances, including hormones commonly known as adipokines. Obesity is a major risk factor for the development of cardiovascular diseases, mainly due to a low grade of inflammation and the excessive fat accumulation produced in this state. The adipose tissue dysfunction in obesity leads to an aberrant release of adipokines, some of them with direct cardiovascular and inflammatory regulatory functions. Inflammation is a common link between obesity and cardiovascular diseases, so this review will summarise the role of the main adipokines implicated in the regulation of the inflammatory processes occurring under the scenario of cardiovascular diseases.
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7
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Shi W, Guo Z, Ji Y, Feng J. The protective effect of recombinant globular adiponectin on testis by modulating autophagy, endoplasmic reticulum stress and oxidative stress in streptozotocin-induced diabetic mice. Eur J Pharmacol 2020; 879:173132. [PMID: 32353359 DOI: 10.1016/j.ejphar.2020.173132] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/24/2019] [Revised: 04/17/2020] [Accepted: 04/20/2020] [Indexed: 02/07/2023]
Abstract
This study was to investigate whether recombinant globular adiponectin produced its protective effect on the testis of diabetic mice by modulating autophagy, endoplasmic reticulum stress and oxidative stress. Male mice were randomly divided into control, diabetic, diabetic treated with low and high dose of adiponectin. Mice were killed at the termination after 4 weeks and 8 weeks of adiponectin treatment. Serum levels of glucose, lipids, testosterone, insulin, LH and FSH were measured. The protein expression of glucose-regulated protein 78 (GRP78), C/EBP homologous protein (CHOP), Caspase12, Beclin1, microtubule-associated protein light chain 3 (LC3) and p62 was determined by western blotting. The mRNA expression of adiponectin receptor 1 (AdipoR1), p22phox, p47phox, nuclear factor erythroid2-related factor 2 (Nrf2), NAD(P)H-quinone oxidoreductase 1(NQO1), heme oxygenase-1 (HO-1) and superoxide dismutase (SOD) were determined by real-time fluorescence quantitative PCR. The testicular weight, the sperm number and motility, and the serum levels of testosterone and insulin were significantly decreased in diabetic mice (P < 0.05). The expression of Beclin1, LC3, Nrf2, NQO1, HO-1, SOD and AdipoR1 were significantly decreased (P < 0.05), while the expression of GRP78, CHOP, Caspase12, p62, p22phox and p47phox were notably increased in the testes of diabetic mice (P < 0.05). Adiponectin treatment significantly reversed the above-mentioned changes in the testes of diabetic mice, some of which were dose- and time-dependent (P < 0.05). These data suggested that recombinant globular adiponectin may produce the protective effect on the testes of diabetic mice by inducing autophagy and inhibiting ER stress and oxidative stress.
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Affiliation(s)
- Wenjiao Shi
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China; Department of Anesthesiology, Xinhua Hospital, Shanghai Jiaotong University, Shanghai, 200092, China
| | - Zhixin Guo
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China.
| | - Yun Ji
- Department of Anesthesiology, Xinhua Hospital, Shanghai Jiaotong University, Shanghai, 200092, China
| | - Jingyi Feng
- Department of Endocrinology, Second Hospital, Shanxi Medical University, Taiyuan, 030001, China
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8
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Guan P, Sun ZM, Wang N, Zhou J, Luo LF, Zhao YS, Ji ES. Resveratrol prevents chronic intermittent hypoxia-induced cardiac hypertrophy by targeting the PI3K/AKT/mTOR pathway. Life Sci 2019; 233:116748. [DOI: 10.1016/j.lfs.2019.116748] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/02/2019] [Revised: 08/02/2019] [Accepted: 08/10/2019] [Indexed: 01/22/2023]
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9
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Daniels LJ, Varma U, Annandale M, Chan E, Mellor KM, Delbridge LMD. Myocardial Energy Stress, Autophagy Induction, and Cardiomyocyte Functional Responses. Antioxid Redox Signal 2019; 31:472-486. [PMID: 30417655 DOI: 10.1089/ars.2018.7650] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Significance: Energy stress in the myocardium occurs in a variety of acute and chronic pathophysiological contexts, including ischemia, nutrient deprivation, and diabetic disease settings of substrate disturbance. Although the heart is highly adaptive and flexible in relation to fuel utilization and routes of adenosine-5'-triphosphate (ATP) generation, maladaptations in energy stress situations confer functional deficit. An understanding of the mechanisms that link energy stress to impaired myocardial performance is crucial. Recent Advances: Emerging evidence suggests that, in parallel with regulated enzymatic pathways that control intracellular substrate supply, other processes of "bulk" autophagic macromolecular breakdown may be important in energy stress conditions. Recent findings indicate that cargo-specific autophagic activity may be important in different stress states. In particular, induction of glycophagy, a glycogen-specific autophagy, has been described in acute and chronic energy stress situations. The impact of elevated cardiomyocyte glucose flux relating to glycophagy dysregulation on contractile function is unknown. Critical Issues: Ischemia- and diabetes-related cardiac adverse events comprise the majority of cardiovascular disease morbidity and mortality. Current therapies involve management of systemic comorbidities. Cardiac-specific adjunct treatments targeted to manage myocardial energy stress responses are lacking. Future Directions: New knowledge is required to understand the mechanisms involved in selective recruitment of autophagic responses in the cardiomyocyte energy stress response. In particular, exploration of the links between cell substrate flux, calcium ion (Ca2+) flux, and phagosomal cargo flux is required. Strategies to target specific fuel "bulk" management defects in cardiac energy stress states may be of therapeutic value.
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Affiliation(s)
- Lorna J Daniels
- 1 Department of Physiology, University of Auckland, Auckland, New Zealand
| | - Upasna Varma
- 2 Department of Physiology, University of Melbourne, Melbourne, Australia
| | - Marco Annandale
- 1 Department of Physiology, University of Auckland, Auckland, New Zealand
| | - Eleia Chan
- 2 Department of Physiology, University of Melbourne, Melbourne, Australia
| | - Kimberley M Mellor
- 1 Department of Physiology, University of Auckland, Auckland, New Zealand.,2 Department of Physiology, University of Melbourne, Melbourne, Australia.,3 Auckland Bioengineering Institute, University of Auckland, Auckland, New Zealand
| | - Lea M D Delbridge
- 2 Department of Physiology, University of Melbourne, Melbourne, Australia
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Huang M, Liu J, Sheng Y, Lv Y, Yu J, Qi H, Di W, Lv S, Zhou S, Ding G. 11β-hydroxysteroid dehydrogenase type 1 inhibitor attenuates high-fat diet induced cardiomyopathy. J Mol Cell Cardiol 2018; 125:106-116. [DOI: 10.1016/j.yjmcc.2018.10.002] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/31/2018] [Revised: 09/06/2018] [Accepted: 10/02/2018] [Indexed: 12/29/2022]
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11
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Yang M, Zhang Y, Ren J. Autophagic Regulation of Lipid Homeostasis in Cardiometabolic Syndrome. Front Cardiovasc Med 2018; 5:38. [PMID: 29774216 PMCID: PMC5943591 DOI: 10.3389/fcvm.2018.00038] [Citation(s) in RCA: 26] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2018] [Accepted: 04/05/2018] [Indexed: 12/28/2022] Open
Abstract
As an important protein quality control process, autophagy is essential for the degradation and removal of long-lived or injured cellular components and organelles. Autophagy is known to participate in a number of pathophysiological processes including cardiometabolic syndrome. Recent findings have shown compelling evidence for the intricate interplay between autophagy and lipid metabolism. Autophagy serves as a major regulator of lipid homeostasis while lipid can also influence autophagosome formation and autophagic signaling. Lipophagy is a unique form of selective autophagy and functions as a fundamental mechanism for clearance of lipid excess in atherosclerotic plaques. Ample of evidence has denoted a novel therapeutic potential for autophagy in deranged lipid metabolism and management of cardiometabolic diseases such as atherosclerosis and diabetic cardiomyopathy. Here we will review the interplays between cardiac autophagy and lipid metabolism in an effort to seek new therapeutic options for cardiometabolic diseases.
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Affiliation(s)
- Mingjie Yang
- Department of Cardiology and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Yingmei Zhang
- Department of Cardiology and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China
| | - Jun Ren
- Department of Cardiology and Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, China.,Center for Cardiovascular Research and Alternative Medicine, University of Wyoming College of Health Sciences, Laramie, WY, United States
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12
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Peng YJ, Shen TL, Chen YS, Mersmann HJ, Liu BH, Ding ST. Adiponectin and adiponectin receptor 1 overexpression enhance inflammatory bowel disease. J Biomed Sci 2018; 25:24. [PMID: 29540173 PMCID: PMC5851065 DOI: 10.1186/s12929-018-0419-3] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2017] [Accepted: 02/06/2018] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Adiponectin (ADN) is an adipokine derived from adipocytes. It binds to adiponectin receptor 1 and 2 (AdipoR1 and R2) to exert its function in regulating whole-body energy homeostasis and inflammatory responses. However, the role of ADN-AdipoR1 signaling in intestinal inflammation is controversial, and its role in the regulation of neutrophils is still unclear. Our goal was to clarify the role of AdipoR1 signaling in colitis and the effects on neutrophils. METHODS We generated porcine AdipoR1 transgenic mice (pAdipoR1 mice) and induced murine colitis using dextran sulfate sodium (DSS) to study the potential role of AdipoR1 in inflammatory bowel disease. We also treated a THP-1 macrophage and a HT-29 colon epithelial cell line with ADN recombinant protein to study the effects of ADN on inflammation. RESULTS After inducing murine colitis, pAdipoR1 mice developed more severe symptoms than wild-type (WT) mice. Treatment with ADN increased the expression of pro-inflammatory factors in THP-1 and HT-29 cells. Moreover, we also observed that the expression of cyclooxygenase2 (cox2), neutrophil chemokines (CXCL1, CXCL2 and CXCL5), and the infiltration of neutrophils were increased in the colon of pAdipoR1 mice. CONCLUSIONS Our study showed that ADN-AdipoR1 signaling exacerbated colonic inflammation through two possible mechanisms. First, ADN-AdipoR1 signaling increased pro-inflammatory factors. Second, AdipoR1 enhanced neutrophil chemokine expression and recruited neutrophils into the colonic tissue to increase inflammation.
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Affiliation(s)
- Yu-Ju Peng
- Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist, Taipei City, 10617 Taiwan
| | - Tang-Long Shen
- Department of Plant Pathology and Microbiology, National Taiwan University, No.1, Sec.4, Roosevelt Road, Taipei, 10617 Taiwan
| | - Yu-Shan Chen
- Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist, Taipei City, 10617 Taiwan
| | - Harry John Mersmann
- Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist, Taipei City, 10617 Taiwan
| | - Bing-Hsien Liu
- Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist, Taipei City, 10617 Taiwan
| | - Shih-Torng Ding
- Department of Animal Science and Technology, National Taiwan University, No. 50, Ln. 155, Sec. 3, Keelung Rd., Da’an Dist, Taipei City, 10617 Taiwan
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13
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Wang Y, Liang B, Lau WB, Du Y, Guo R, Yan Z, Gan L, Yan W, Zhao J, Gao E, Koch W, Ma XL. Restoring diabetes-induced autophagic flux arrest in ischemic/reperfused heart by ADIPOR (adiponectin receptor) activation involves both AMPK-dependent and AMPK-independent signaling. Autophagy 2017; 13:1855-1869. [PMID: 28825851 DOI: 10.1080/15548627.2017.1358848] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022] Open
Abstract
Macroautophagy/autophagy is increasingly recognized as an important regulator of myocardial ischemia-reperfusion (MI-R) injury. However, whether and how diabetes may alter autophagy in response to MI-R remains unknown. Deficiency of ADIPOQ, a cardioprotective molecule, markedly increases MI-R injury. However, the role of diabetic hypoadiponectinemia in cardiac autophagy alteration after MI-R is unclear. Utilizing normal control (NC), high-fat-diet-induced diabetes, and Adipoq knockout (adipoq-/-) mice, we demonstrated that autophagosome formation was modestly inhibited and autophagosome clearance was markedly impaired in the diabetic heart subjected to MI-R. adipoq-/- largely reproduced the phenotypic alterations observed in the ischemic-reperfused diabetic heart. Treatment of diabetic and adipoq-/- mice with AdipoRon, a novel ADIPOR (adiponectin receptor) agonist, stimulated autophagosome formation, markedly increased autophagosome clearance, reduced infarct size, and improved cardiac function (P < 0.01 vs vehicle). Mechanistically, AdipoRon caused significant phosphorylation of AMPK-BECN1 (Ser93/Thr119)-class III PtdIns3K (Ser164) and enhanced lysosome protein LAMP2 expression both in vivo and in isolated adult cardiomyocytes. Pharmacological AMPK inhibition or genetic Prkaa2 mutation abolished AdipoRon-induced BECN1 (Ser93/Thr119)-PtdIns3K (Ser164) phosphorylation and AdipoRon-stimulated autophagosome formation. However, AdipoRon-induced LAMP2 expression, AdipoRon-stimulated autophagosome clearance, and AdipoRon-suppressed superoxide generation were not affected by AMPK inhibition. Treatment with MnTMPyP (a superoxide scavenger) increased LAMP2 expression and stimulated autophagosome clearance in simulated ischemic-reperfused cardiomyocytes. However, no additive effect between AdipoRon and MnTMPyP was observed. Collectively, these results demonstrate that hypoadiponectinemia impairs autophagic flux, contributing to enhanced MI-R injury in the diabetic state. ADIPOR activation restores AMPK-mediated autophagosome formation and antioxidant-mediated autophagosome clearance, representing a novel intervention effective against MI-R injury in diabetic conditions.
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Affiliation(s)
- Yajing Wang
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA.,b Center for Translational Medicine, Department of Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Bin Liang
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Wayne Bond Lau
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Yunhui Du
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Rui Guo
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Zheyi Yan
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Lu Gan
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Wenjun Yan
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Jianli Zhao
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA
| | - Erhe Gao
- c Center for Translational Medicine , Temple University , Philadelphia , PA , USA
| | - Walter Koch
- c Center for Translational Medicine , Temple University , Philadelphia , PA , USA
| | - Xin-Liang Ma
- a Department of Emergency Medicine , Thomas Jefferson University , Philadelphia , PA , USA.,b Center for Translational Medicine, Department of Medicine , Thomas Jefferson University , Philadelphia , PA , USA
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de Luis DA, Almansa R, Aller R, Izaola O, Romero E. Gene expression analysis identify a metabolic and cell function alterations as a hallmark of obesity without metabolic syndrome in peripheral blood, a pilot study. Clin Nutr 2017. [PMID: 28633944 DOI: 10.1016/j.clnu.2017.06.006] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
Abstract
BACKGROUND Understanding molecular basis involved in overweight is an important first step in developing therapeutic pathways against excess in body weight gain. OBJECTIVE The purpose of our pilot study was to evaluate the gene expression profiles in the peripheral blood of obese patients without other metabolic complications. DESIGN A sample of 17 obese patients without metabolic syndrome and 15 non obese control subjects was evaluated in a prospective way. Following 'One-Color Microarray-Based Gene Expression Analysis' protocol Version 5.7 (Agilent p/n 4140-90040), cRNA was hybridized with Whole Human Genome Oligo Microarray Kit (Agilent p/n G2519F-014850) containing 41,000+ unique human genes and transcripts. RESULTS The average age of the study group was 43.6 ± 19.7 years with a sex distribution of 64.7% females and 35.3% males. No statistical differences were detected with healthy controls 41.9 ± 12.3 years with a sex distribution of 70% females and 30% males. Obese patients showed 1436 genes that were differentially expressed compared to control group. Ingenuity Pathway Analysis showed that these genes participated in 13 different categories related to metabolism and cellular functions. In the gene set of cellular function, the most important genes were C-terminal region of Nel-like molecule 1 protein (NELL1) and Pigment epithelium-derived factor (SPEDF), both genes were over-expressed. In the gene set of metabolism, insulin growth factor type 1 (IGF1), ApoA5 (apolipoprotein subtype 5), Foxo4 (Forkhead transcription factor 4), ADIPOR1 (receptor of adiponectin type 1) and AQP7 (aquaporin channel proteins7) were over expressed. Moreover, PIKFYVE (PtdIns(3) P 5-kinase), and ROCK-2 (rho-kinase II) were under expressed. CONCLUSION We showed that PBMCs from obese subjects presented significant changes in gene expression, exhibiting 1436 differentially expressed genes compared to PBMCs from non-obese subjects. Furthermore, our data showed a number of genes involved in relevant processes implicated in metabolism, with genes presenting high fold-change values (up-regulation and down regulation) associated with lipid, carbohydrate and protein metabolism.
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Affiliation(s)
- Daniel Antonio de Luis
- Center of Investigation of Endocrinology and Nutrition, Medicine School and Dpt. of Endocrinology and Nutrition, University of Valladolid, Valladolid, Spain.
| | - Raquel Almansa
- Infection & Immunity Unit Hospital Clinico Universitario, University of Valladolid, Valladolid, Spain
| | - Rocío Aller
- Center of Investigation of Endocrinology and Nutrition, Medicine School and Dpt. of Endocrinology and Nutrition, University of Valladolid, Valladolid, Spain
| | - Olatz Izaola
- Center of Investigation of Endocrinology and Nutrition, Medicine School and Dpt. of Endocrinology and Nutrition, University of Valladolid, Valladolid, Spain
| | - E Romero
- Center of Investigation of Endocrinology and Nutrition, Medicine School and Dpt. of Endocrinology and Nutrition, University of Valladolid, Valladolid, Spain
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Delbridge LMD, Mellor KM, Taylor DJ, Gottlieb RA. Myocardial stress and autophagy: mechanisms and potential therapies. Nat Rev Cardiol 2017; 14:412-425. [PMID: 28361977 DOI: 10.1038/nrcardio.2017.35] [Citation(s) in RCA: 120] [Impact Index Per Article: 17.1] [Reference Citation Analysis] [Abstract] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Autophagy is a ubiquitous cellular catabolic process responsive to energy stress. Research over the past decade has revealed that cardiomyocyte autophagy is a prominent homeostatic pathway, important in adaptation to altered myocardial metabolic demand. The cellular machinery of autophagy involves targeted direction of macromolecules and organelles for lysosomal degradation. Activation of autophagy has been identified as cardioprotective in some settings (that is, ischaemia and ischaemic preconditioning). In other situations, sustained autophagy has been linked with cardiopathology (for example, sustained pressure overload and heart failure). Perturbation of autophagy in diabetic cardiomyopathy has also been observed and is associated with both adaptive and maladaptive responses to stress. Emerging research findings indicate that various forms of selective autophagy operate in parallel to manage various types of catabolic cellular cargo including mitochondria, large proteins, glycogen, and stored lipids. In this Review, induction of autophagy associated with cardiac benefit or detriment is considered. The various static and dynamic approaches used to measure autophagy are critiqued, and current inconsistencies in the understanding of autophagy regulation in the heart are highlighted. The prospects for pharmacological intervention to achieve therapeutic manipulation of autophagic processes are also discussed.
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Affiliation(s)
- Lea M D Delbridge
- School of Biomedical Sciences, University of Melbourne, Melbourne, Victoria 3010, Australia
| | - Kimberley M Mellor
- Department of Physiology, Medical &Health Sciences, University of Auckland, 85 Park Road, Grafton, Auckland 1023, New Zealand
| | - David J Taylor
- Heart Institute, Cedars-Sinai Hospital, 127 South San Vicente Boulevard, Los Angeles, California 90048, USA
| | - Roberta A Gottlieb
- Heart Institute, Cedars-Sinai Hospital, 127 South San Vicente Boulevard, Los Angeles, California 90048, USA
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Muscle-specific overexpression of AdipoR1 or AdipoR2 gives rise to common and discrete local effects whilst AdipoR2 promotes additional systemic effects. Sci Rep 2017; 7:41792. [PMID: 28145500 PMCID: PMC5286438 DOI: 10.1038/srep41792] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2016] [Accepted: 12/28/2016] [Indexed: 01/21/2023] Open
Abstract
Hypoadiponectinemia and adiponectin resistance are implicated in the aetiology of obesity-related cardiometabolic disorders, hence represent a potential therapeutic axis. Here we characterised the effects of in vivo electrotransfer-mediated overexpression of the adiponectin receptors, AdipoR1 or AdipoR2, into tibialis anterior muscle (TAM) of lean or obese mice. In lean mice, TAM-specific overexpression of AdipoR1 (TAMR1) or AdipoR2 (TAMR2) increased phosphorylation of AMPK, AKT and ERK and expression of the insulin responsive glucose transporter glut4. In contrast, only TAMR2 increased pparα and a target gene acox1. These effects were decreased in obese mice despite no reduction in circulating adiponectin levels. TAMR2 also increased expression of adipoQ in TAM of lean and obese mice. Furthermore, in obese mice TAMR2 promoted systemic effects including; decreased weight gain; reduced epididymal fat mass and inflammation; increased epididymal adipoQ expression; increased circulating adiponectin. Collectively, these results demonstrate that AdipoR1 and AdipoR2 exhibit overlapping and distinct effects in skeletal muscle consistent with enhanced adiponectin sensitivity but these appear insufficient to ameliorate established obesity-induced adiponectin resistance. We also identify systemic effects upon TAMR2 in obese mice and postulate these are mediated by altered myokine production. Further studies are warranted to investigate this possibility which may reveal novel therapeutic approaches.
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Sung MM, Byrne NJ, Kim TT, Levasseur J, Masson G, Boisvenue JJ, Febbraio M, Dyck JRB. Cardiomyocyte-specific ablation of CD36 accelerates the progression from compensated cardiac hypertrophy to heart failure. Am J Physiol Heart Circ Physiol 2017; 312:H552-H560. [PMID: 28062415 DOI: 10.1152/ajpheart.00626.2016] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/15/2016] [Revised: 12/27/2016] [Accepted: 12/28/2016] [Indexed: 11/22/2022]
Abstract
Previous studies have shown that loss of CD36 protects the heart from dysfunction induced by pressure overload in the presence of diet-induced insulin resistance and/or obesity. The beneficial effects of CD36 ablation in this context are mediated by preventing excessive cardiac fatty acid (FA) entry and reducing lipotoxic injury. However, whether or not the loss of CD36 can prevent pressure overload-induced cardiac dysfunction in the absence of chronic exposure to high circulating FAs is presently unknown. To address this, we utilized a tamoxifen-inducible cardiomyocyte-specific CD36 knockout (icCD36KO) mouse and genetically deleted CD36 in adulthood. Control mice (CD36 floxed/floxed mice) and icCD36KO mice were treated with tamoxifen and subsequently subjected to transverse aortic constriction (TAC) surgery to generate pressure overload-induced cardiac hypertrophy. Consistent with CD36 mediating a significant proportion of FA entry into the cardiomyocyte and subsequent FA utilization for ATP production, hearts from icCD36KO mice were metabolically inefficient and displayed signs of energetic stress, including activation of the energetic stress kinase, AMPK. In addition, impaired energetics in icCD36KO mice contributed to a rapid progression from compensated hypertrophy to heart failure. However, icCD36KO mice fed a medium-chain FA diet, whereby medium-chain FAs can enter into the cardiomyocyte independent from CD36, were protected from TAC-induced heart failure. Together these data suggest that limiting FA uptake and partial inhibition of FA oxidation in the heart via CD36 ablation may be detrimental for the compensated hypertrophic heart in the absence of sufficiently elevated circulating FAs to provide an adequate energy source.NEW & NOTEWORTHY Limiting CD36-mediated fatty acid uptake in the setting of obesity and/or insulin resistance protects the heart from cardiac hypertrophy and dysfunction. However, cardiomyocyte-specific CD36 ablation in the absence of elevated circulating fatty acid levels accelerates the progression of pressure overload-induced cardiac hypertrophy to systolic heart failure.
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Affiliation(s)
- Miranda M Sung
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Nikole J Byrne
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Ty T Kim
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Jody Levasseur
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Grant Masson
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Jamie J Boisvenue
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
| | - Maria Febbraio
- Department of Dentistry, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada
| | - Jason R B Dyck
- Department of Pediatrics, Cardiovascular Research Centre, and Mazankowski Alberta Heart Institute, Faculty of Medicine and Dentistry, University of Alberta, Edmonton, Alberta, Canada; and
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18
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Abstract
The decrease in adiponectin levels are negatively correlated with chronic subclinical inflammation markers in obesity. The hypertrophic adipocytes cause obesity-linked insulin resistance and metabolic syndrome. Furthermore, macrophage polarization is a key determinant regulating adiponectin receptor (AdipoR1/R2) expression and differential adiponectin-mediated macrophage inflammatory responses in obese individuals. In addition to decrease in adiponectin concentrations, the decline in AdipoR1/R2 mRNA expression leads to a decrement in adiponectin binding to cell membrane, and this turns into attenuation in the adiponectin effects. Within the receptor complex, adaptor protein-containing pleckstrin homology domain, phosphotyrosine-binding domain, and leucine zipper motif 1 (APPL1) is the intracellular binding partner of AdipoR1 and AdipoR2. The expression levels of APPL1 or APPL2 lead to an altered adiponectin activity. Despite normal or high adiponectin levels, an impaired post receptor signaling due to APPL1/APPL2 may alter adiponectin efficiency and activity. However, APPL2 blocks adiponectin signaling through AdipoR1 and AdipoR2 by competitive inhibition of APPL1. APPL1 is also an important mediator of adiponectin dependent insulin sensitization. In this context, adiponectin resistance is associated with insulin resistance and is thought to be partly due to the down-regulation of the AdipoRs in high-fat diet fed subjects. Actually, adiponectin resistance occurs very rapidly after saturated fatty acid feeding, this metabolic disturbance is not due to a decrease in AdipoR1 protein content. Intra-abdominal adipose tissue-AdipoR2 expression is reduced in obesity, whereas AdipoR1 expression is not changed. Adiponectin resistance together with insulin resistance forms a vicious cycle. The elevated adiponectin levels with adiponectin resistance is a compensatory response in the condition of an unusual discordance between insulin resistance and adiponectin unresponsiveness.Additionally, different mechanisms are involved in vascular adiponectin resistance at different stages of obesity. Nevertheless, diet-induced hyperlipidemia is the leading cause of vascular adiponectin resistance. Leptin/adiponectin imbalance may also be an important marker of the elevated risk of developing abdominal obesity-associated cardiovascular diseases.
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Affiliation(s)
- Atilla Engin
- Faculty of Medicine, Department of General Surgery, Gazi University, Besevler, Ankara, Turkey.
- , Mustafa Kemal Mah. 2137. Sok. 8/14, 06520, Cankaya, Ankara, Turkey.
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19
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Yang Y, Zhao C, Yang P, Wang X, Wang L, Chen A. Autophagy in cardiac metabolic control: Novel mechanisms for cardiovascular disorders. Cell Biol Int 2016; 40:944-54. [PMID: 27191043 DOI: 10.1002/cbin.10626] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2016] [Revised: 05/10/2016] [Accepted: 05/13/2016] [Indexed: 01/01/2023]
Abstract
As an extensively studied quality control system, autophagy is responsible for clearance of dysfunctional organelles and damaged marcomolecules in cells. In addition to its biological recycling function, autophagy plays a significant role in the pathogenesis of metabolic syndromes such as obesity and diabetes. In particular, metabolic disorders contribute to cardiovascular disease development. As energy required to maintain cardiac cells functional is immense, disturbances in the balance between anabolic and catabolic metabolism possibly contribute to cardiovascular disorders. Therefore, an urgent need to expand our knowledge on the role of autophagy on the metabolic regulation of hearts emerges. In this review, the potential relationship between autophagic activity and cardiac metabolism is explored and we also discuss how dysregulated autophagy leads to severe cardiac disorders from the perspective of metabolic control.
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Affiliation(s)
- Yufei Yang
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
| | - Cong Zhao
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
| | - Pingzhen Yang
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
| | - Xianbao Wang
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
| | - Lizi Wang
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
| | - Aihua Chen
- Department of Cardiology, Zhujiang Hospital, Southern Medical University, Guangzhou City, China
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20
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Li L, Xu J, He L, Peng L, Zhong Q, Chen L, Jiang Z. The role of autophagy in cardiac hypertrophy. Acta Biochim Biophys Sin (Shanghai) 2016; 48:491-500. [PMID: 27084518 PMCID: PMC4913516 DOI: 10.1093/abbs/gmw025] [Citation(s) in RCA: 52] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2015] [Accepted: 01/25/2016] [Indexed: 12/12/2022] Open
Abstract
Autophagy is conserved in nature from lower eukaryotes to mammals and is an important self-cannibalizing, degradative process that contributes to the elimination of superfluous materials. Cardiac hypertrophy is primarily characterized by excess protein synthesis, increased cardiomyocyte size, and thickened ventricular walls and is a major risk factor that promotes arrhythmia and heart failure. In recent years, cardiomyocyte autophagy has been considered to play a role in controlling the hypertrophic response. However, the beneficial or aggravating role of cardiomyocyte autophagy in cardiac hypertrophy remains controversial. The exact mechanism of cardiomyocyte autophagy in cardiac hypertrophy requires further study. In this review, we summarize the controversies associated with autophagy in cardiac hypertrophy and provide insights into the role of autophagy in the development of cardiac hypertrophy. We conclude that future studies should emphasize the relationship between autophagy and the different stages of cardiac hypertrophy, as well as the autophagic flux and selective autophagy. Autophagy will be a potential therapeutic target for cardiac hypertrophy.
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Affiliation(s)
- Lanfang Li
- Post-Doctoral Mobile Stations for Basic Medicine, Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang 421001, China Hunan Children's Hospital and School of Pediatrics, University of South China, Changsha 410007, China
| | - Jin Xu
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang 421001, China
| | - Lu He
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang 421001, China
| | - Lijun Peng
- Post-Doctoral Mobile Stations for Basic Medicine, Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang 421001, China Hunan Children's Hospital and School of Pediatrics, University of South China, Changsha 410007, China
| | - Qiaoqing Zhong
- Post-Doctoral Mobile Stations for Basic Medicine, Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang 421001, China
| | - Linxi Chen
- Hunan Province Cooperative Innovation Center for Molecular Target New Drug Study, Institute of Pharmacy and Pharmacology, Learning Key Laboratory for Pharmacoproteomics, University of South China, Hengyang 421001, China
| | - Zhisheng Jiang
- Post-Doctoral Mobile Stations for Basic Medicine, Institute of Cardiovascular Disease, Key Laboratory for Arteriosclerology of Hunan Province, University of South China, Hengyang 421001, China
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21
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Zhang Z, Chen J, Zhou S, Wang S, Cai X, Conklin DJ, Kim KS, Kim KH, Tan Y, Zheng Y, Kim YH, Cai L. Magnolia bioactive constituent 4-O-methylhonokiol prevents the impairment of cardiac insulin signaling and the cardiac pathogenesis in high-fat diet-induced obese mice. Int J Biol Sci 2015; 11:879-91. [PMID: 26157343 PMCID: PMC4495406 DOI: 10.7150/ijbs.12101] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2015] [Accepted: 05/13/2015] [Indexed: 12/16/2022] Open
Abstract
In obesity, cardiac insulin resistance is a putative cause of cardiac hypertrophy and dysfunction. In our previous study, we observed that Magnolia extract BL153 attenuated high-fat-diet (HFD)-induced cardiac pathogenic changes. In this study, we further investigated the protective effects of the BL153 bioactive constituent, 4-O-methylhonokiol (MH), against HFD-induced cardiac pathogenesis and its possible mechanisms. C57BL/6J mice were fed a normal diet or a HFD with gavage administration of vehicle, BL153, or MH (low or high dose) daily for 24 weeks. Treatment with MH attenuated HFD-induced obesity, as evidenced by body weight gain, and cardiac pathogenesis, as assessed by the heart weight and echocardiography. Mechanistically, MH treatment significantly reduced HFD-induced impairment of cardiac insulin signaling by preferentially augmenting Akt2 signaling. MH also inhibited cardiac expression of the inflammatory factors tumor necrosis factor-α and plasminogen activator inhibitor-1 and increased the phosphorylation of nuclear factor erythroid-derived 2-like 2 (Nrf2) as well as the expression of a Nrf2 downstream target gene heme oxygenase-1. The increased Nrf2 signaling was associated with decreased oxidative stress and damage, as reflected by lowered malondialdehyde and 3-nitrotyrosine levels. Furthermore, MH reduced HFD-induced cardiac lipid accumulation along with lowering expression of cardiac fatty acid translocase/CD36 protein. These results suggest that MH, a bioactive constituent of Magnolia, prevents HFD-induced cardiac pathogenesis by attenuating the impairment of cardiac insulin signaling, perhaps via activation of Nrf2 and Akt2 signaling to attenuate CD36-mediated lipid accumulation and lipotoxicity.
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Affiliation(s)
- Zhiguo Zhang
- 1. Department of Cardiology at the First Hospital of Jilin University, Changchun, 130021, China ; 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China ; 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
| | - Jing Chen
- 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
| | - Shanshan Zhou
- 1. Department of Cardiology at the First Hospital of Jilin University, Changchun, 130021, China ; 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China ; 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
| | - Shudong Wang
- 1. Department of Cardiology at the First Hospital of Jilin University, Changchun, 130021, China ; 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China ; 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
| | - Xiaohong Cai
- 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China
| | - Daniel J Conklin
- 4. Diabetes and Obesity Center, University of Louisville, Louisville, KY 40202
| | - Ki-Soo Kim
- 5. Bioland Biotec HaiMen Co., Ltd, Linjiang New District, Haomen, 226100, China
| | - Ki Ho Kim
- 6. KHBios, 505 Venture Center, 194-41, Osongsaengmyeong 1, Osong, Cheongju, Chungbuk 363-951, Republic of Korea
| | - Yi Tan
- 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China ; 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
| | - Yang Zheng
- 1. Department of Cardiology at the First Hospital of Jilin University, Changchun, 130021, China
| | - Young Heui Kim
- 7. Bioland R&D Center, 59 Songjeongni 2-gil, Byeongcheon, Dongnam, Cheonan, Chungnam 330-863, Republic of Korea
| | - Lu Cai
- 2. The Chinese-American Research Institute for Diabetic Complications and the Second Affiliated Hospital, Wenzhou Medical University, Wenzhou 325035, China ; 3. Kosair Children's Hospital Research Institute, Department of Pediatrics of University of Louisville, Louisville, KY 40202
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Delbridge LMD, Mellor KM, Taylor DJR, Gottlieb RA. Myocardial autophagic energy stress responses--macroautophagy, mitophagy, and glycophagy. Am J Physiol Heart Circ Physiol 2015; 308:H1194-204. [PMID: 25747748 DOI: 10.1152/ajpheart.00002.2015] [Citation(s) in RCA: 51] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/02/2015] [Accepted: 03/02/2015] [Indexed: 12/26/2022]
Abstract
An understanding of the role of autophagic processes in the management of cardiac metabolic stress responses is advancing rapidly and progressing beyond a conceptualization of the autophagosome as a simple cell recycling depot. The importance of autophagy dysregulation in diabetic cardiomyopathy and in ischemic heart disease - both conditions comprising the majority of cardiac disease burden - has now become apparent. New findings have revealed that specific autophagic processes may operate in the cardiomyocyte, specialized for selective recognition and management of mitochondria and glycogen particles in addition to protein macromolecular structures. Thus mitophagy, glycophagy, and macroautophagy regulatory pathways have become the focus of intensive experimental effort, and delineating the signaling pathways involved in these processes offers potential for targeted therapeutic intervention. Chronically elevated macroautophagic activity in the diabetic myocardium is generally observed in association with structural and functional cardiomyopathy; yet there are also numerous reports of detrimental effect of autophagy suppression in diabetes. Autophagy induction has been identified as a key component of protective mechanisms that can be recruited to support the ischemic heart, but in this setting benefit may be mitigated by adverse downstream autophagic consequences. Recent report of glycophagy upregulation in diabetic cardiomyopathy opens up a novel area of investigation. Similarly, a role for glycogen management in ischemia protection through glycophagy initiation is an exciting prospect under investigation.
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Affiliation(s)
- Lea M D Delbridge
- Department of Physiology, University of Melbourne, Melbourne, Victoria, Australia;
| | - Kimberley M Mellor
- Department of Physiology, University of Melbourne, Melbourne, Victoria, Australia; Department of Physiology, University of Auckland, New Zealand; and
| | - David J R Taylor
- Heart Institute, Cedars-Sinai Medical Center, Los Angeles, California
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Fuentes-Antrás J, Picatoste B, Ramírez E, Egido J, Tuñón J, Lorenzo Ó. Targeting metabolic disturbance in the diabetic heart. Cardiovasc Diabetol 2015; 14:17. [PMID: 25856422 PMCID: PMC4328972 DOI: 10.1186/s12933-015-0173-8] [Citation(s) in RCA: 39] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 01/02/2015] [Indexed: 02/07/2023] Open
Abstract
Diabetic cardiomyopathy is defined as ventricular dysfunction initiated by alterations in cardiac energy substrates in the absence of coronary artery disease and hypertension. In addition to the demonstrated burden of cardiovascular events associated with diabetes, diabetic cardiomyopathy partly explains why diabetic patients are subject to a greater risk of heart failure and a worse outcome after myocardial ischemia. The raising prevalence and accumulating costs of cardiovascular disease in diabetic patients underscore the deficiencies of tertiary prevention and call for a shift in medical treatment. It is becoming increasingly clearer that the effective prevention and treatment of diabetic cardiomyopathy require measures to regulate the metabolic derangement occurring in the heart rather than merely restoring suitable systemic parameters. Recent research has provided deeper insight into the metabolic etiology of diabetic cardiomyopathy and numerous heart-specific targets that may substitute or reinforce current strategies. From both experimental and translational perspectives, in this review we first discuss the progress made with conventional therapies, and then focus on the need for prospective metabolic targets that may avert myocardial vulnerability and functional decline in next-generation diabetic care.
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Affiliation(s)
- Jesús Fuentes-Antrás
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
| | - Belén Picatoste
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
- />Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) network, Madrid, Spain
| | - Elisa Ramírez
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
- />Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) network, Madrid, Spain
| | - Jesús Egido
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
- />Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) network, Madrid, Spain
| | - José Tuñón
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
| | - Óscar Lorenzo
- />Vascular, Renal and Diabetes Laboratory, IIS-Fundación Jiménez Díaz, Autónoma University, Av. Reyes Católicos 2, Madrid, 28040 Spain
- />Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) network, Madrid, Spain
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24
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Kazama K, Okada M, Yamawaki H. Adipocytokine, omentin inhibits doxorubicin-induced H9c2 cardiomyoblasts apoptosis through the inhibition of mitochondrial reactive oxygen species. Biochem Biophys Res Commun 2015; 457:602-7. [DOI: 10.1016/j.bbrc.2015.01.032] [Citation(s) in RCA: 29] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2015] [Accepted: 01/11/2015] [Indexed: 01/21/2023]
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25
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Laws KM, Sampson LL, Drummond-Barbosa D. Insulin-independent role of adiponectin receptor signaling in Drosophila germline stem cell maintenance. Dev Biol 2015; 399:226-36. [PMID: 25576925 DOI: 10.1016/j.ydbio.2014.12.033] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2014] [Revised: 12/02/2014] [Accepted: 12/29/2014] [Indexed: 10/24/2022]
Abstract
Adipocytes have key endocrine roles, mediated in large part by secreted protein hormones termed adipokines. The adipokine adiponectin is well known for its role in sensitizing peripheral tissues to insulin, and several lines of evidence suggest that adiponectin might also modulate stem cells/precursors. It remains unclear, however, how adiponectin signaling controls stem cells and whether this role is secondary to its insulin-sensitizing effects or distinct. Drosophila adipocytes also function as an endocrine organ and, although no obvious adiponectin homolog has been identified, Drosophila AdipoR encodes a well-conserved homolog of mammalian adiponectin receptors. Here, we generate a null AdipoR allele and use clonal analysis to demonstrate an intrinsic requirement for AdipoR in germline stem cell (GSC) maintenance in the Drosophila ovary. AdipoR null GSCs are not fully responsive to bone morphogenetic protein ligands from the niche and have a slight reduction in E-cadherin levels at the GSC-niche junction. Conversely, germline-specific overexpression of AdipoR inhibits natural GSC loss, suggesting that reduction in adiponectin signaling might contribute to the normal decline in GSC numbers observed over time in wild-type females. Surprisingly, AdipoR is not required for insulin sensitization of the germline, leading us to speculate that insulin sensitization is a more recently acquired function than stem cell regulation in the evolutionary history of adiponectin signaling. Our findings establish Drosophila female GSCs as a new system for future studies addressing the molecular mechanisms whereby adiponectin receptor signaling modulates stem cell fate.
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Affiliation(s)
- Kaitlin M Laws
- Department of Biochemistry and Molecular Biology, Division of Reproductive Biology, Baltimore, MD, USA
| | - Leesa L Sampson
- Department of Biochemistry and Molecular Biology, Division of Reproductive Biology, Baltimore, MD, USA
| | - Daniela Drummond-Barbosa
- Department of Biochemistry and Molecular Biology, Division of Reproductive Biology, Baltimore, MD, USA; Department of Environmental Health Sciences, Johns Hopkins Bloomberg School of Public Health, Baltimore, MD 21205, USA.
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