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Lin X, Fei MZ, Huang AX, Yang L, Zeng ZJ, Gao W. Breviscapine protects against pathological cardiac hypertrophy by targeting FOXO3a-mitofusin-1 mediated mitochondrial fusion. Free Radic Biol Med 2024; 212:477-492. [PMID: 38190924 DOI: 10.1016/j.freeradbiomed.2024.01.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/20/2023] [Revised: 12/22/2023] [Accepted: 01/05/2024] [Indexed: 01/10/2024]
Abstract
Forkhead box O3a (FOXO3a)-mediated mitochondrial dysfunction plays a pivotal effect on cardiac hypertrophy and heart failure (HF). However, the role and underlying mechanisms of FOXO3a, regulated by breviscapine (BRE), on mitochondrial function in HF therapy remain unclear. This study reveals that BRE-induced nuclear translocation of FOXO3a facilitates mitofusin-1 (MFN-1)-dependent mitochondrial fusion in cardiac hypertrophy and HF. BRE effectively promotes cardiac function and ameliorates cardiac remodeling in pressure overload-induced mice. In addition, BRE mitigates phenylephrine (PE)-induced cardiac hypertrophy in cardiomyocytes and fibrosis remodeling in fibroblasts by inhibiting ROS production and promoting mitochondrial fusion, respectively. Transcriptomics analysis underscores the close association between the FOXO pathway and the protective effect of BRE against HF, with FOXO3a emerging as a potential target of BRE. BRE potentiates the nuclear translocation of FOXO3a by attenuating its phosphorylation, other than its acetylation in cardiac hypertrophy. Mechanistically, over-expression of FOXO3a significantly inhibits cardiac hypertrophy and mitochondrial injury by promoting MFN-1-mediated mitochondrial fusion. Furthermore, BRE demonstrates its ability to substantially curb cardiac hypertrophy, reduce mitochondrial ROS production, and enhance MFN-1-mediated mitochondrial fusion through a FOXO3a-dependent mechanism. In conclusion, nuclear FOXO3a translocation induced by BRE presents a successful therapeutic avenue for addressing cardiac hypertrophy and HF through promoting MFN-1-dependent mitochondrial fusion.
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Affiliation(s)
- Xiaobing Lin
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Ming-Zhou Fei
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - An-Xian Huang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Liu Yang
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Ze-Jie Zeng
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China
| | - Wen Gao
- State Key Laboratory of Natural Medicines, School of Traditional Chinese Pharmacy, China Pharmaceutical University, Nanjing, 211198, China.
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2
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Martin TG, Hunt DR, Langer SJ, Tan Y, Ebmeier CC, Crocini C, Chung E, Leinwand LA. A Conserved Mechanism of Cardiac Hypertrophy Regression through FoxO1. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2024:2024.01.27.577585. [PMID: 38328143 PMCID: PMC10849654 DOI: 10.1101/2024.01.27.577585] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/09/2024]
Abstract
The heart is a highly plastic organ that responds to diverse stimuli to modify form and function. The molecular mechanisms of adaptive physiological cardiac hypertrophy are well-established; however, the regulation of hypertrophy regression is poorly understood. To identify molecular features of regression, we studied Burmese pythons which experience reversible cardiac hypertrophy following large, infrequent meals. Using multi-omics screens followed by targeted analyses, we found forkhead box protein O1 (FoxO1) transcription factor signaling, and downstream autophagy activity, were downregulated during hypertrophy, but re-activated with regression. To determine whether these events were mechanistically related to regression, we established an in vitro platform of cardiomyocyte hypertrophy and regression from treatment with fed python plasma. FoxO1 inhibition prevented regression in this system, while FoxO1 activation reversed fed python plasma-induced hypertrophy in an autophagy-dependent manner. We next examined whether FoxO1 was implicated in mammalian models of reversible hypertrophy from exercise and pregnancy and found that in both cases FoxO1 was activated during regression. In these models, as in pythons, activation of FoxO1 was associated with increased expression FoxO1 target genes involved in autophagy. Taken together, our findings suggest FoxO1-dependent autophagy is a conserved mechanism for regression of physiological cardiac hypertrophy across species.
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Affiliation(s)
- Thomas G. Martin
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Dakota R. Hunt
- Department of Biochemistry, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Stephen J. Langer
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Yuxiao Tan
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Christopher C. Ebmeier
- Department of Biochemistry, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Claudia Crocini
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
| | - Eunhee Chung
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
- Department of Kinesiology, University of Texas at San Antonio, San Antonio, TX
| | - Leslie A. Leinwand
- Department of Molecular, Cellular, and Developmental Biology, University of Colorado Boulder, Boulder CO
- BioFrontiers Institute, University of Colorado Boulder, Boulder CO
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Hu Y, Yi L, Yang Y, Wu Z, Kong M, Kang Z, Yang Z. Acetylation of FOXO1 activates Bim expression involved in CVB3 induced cardiomyocyte apoptosis. Apoptosis 2023:10.1007/s10495-023-01924-3. [PMID: 38127284 DOI: 10.1007/s10495-023-01924-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Accepted: 11/25/2023] [Indexed: 12/23/2023]
Abstract
Viral myocarditis (VMC) is the major reason for sudden cardiac death among both children and young adults. Of these, coxsackievirus B3 (CVB3) is the most common causative agent of myocarditis. Recently, the role of signaling pathways in the pathogenesis of VMC has been evaluated in several studies, which has provided a new perspective on identifying potential therapeutic targets for this hitherto incurable disease. In the present study, in vivo and in vitro experiments showed that CVB3 infection leads to increased Bim expression and triggers apoptosis. In addition, by knocking down Bim using RNAi, we further confirmed the biological function of Bim in apoptosis induced by CVB3 infection. We additionally found that Bim and forkhead box O1 class (FOXO1) inhibition significantly increased the viability of CVB3-infected cells while blocking viral replication and viral release. Moreover, CVB3-induced Bim expression was directly dependent on FOXO1 acetylation, which is catalyzed by the co-regulation of CBP and SirTs. Furthermore, the acetylation of FOXO1 was an important step in Bim activation and apoptosis induced by CVB3 infection. The findings of this study suggest that CVB3 infection induces apoptosis through the FOXO1 acetylation-Bim pathway, thus providing new insights for developing potential therapeutic targets for enteroviral myocarditis.
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Affiliation(s)
- Yanan Hu
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Lu Yi
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Yeyi Yang
- Department of Medicine, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Zhixiang Wu
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Min Kong
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Zhijuan Kang
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China
| | - Zuocheng Yang
- Department of Pediatrics, Third Xiangya Hospital of Central South University, Changsha, Hunan, 410013, People's Republic of China.
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Shi LX, Liu XR, Zhou LY, Zhu ZQ, Yuan Q, Zou T. Nanocarriers for gene delivery to the cardiovascular system. Biomater Sci 2023; 11:7709-7729. [PMID: 37877418 DOI: 10.1039/d3bm01275a] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2023]
Abstract
Cardiovascular diseases have posed a great threat to human health. Fortunately, gene therapy holds great promise in the fight against cardiovascular disease (CVD). In gene therapy, it is necessary to select the appropriate carriers to deliver the genes to the target cells of the target organs. There are usually two types of carriers, viral carriers and non-viral carriers. However, problems such as high immunogenicity, inflammatory response, and limited loading capacity have arisen with the use of viral carriers. Therefore, scholars turned their attention to non-viral carriers. Among them, nanocarriers are highly valued because of their easy modification, targeting, and low toxicity. Despite the many successes of gene therapy in the treatment of human diseases, it is worth noting that there are still many problems to be solved in the field of gene therapy for the treatment of cardiovascular diseases. In this review, we give a brief introduction to the common nanocarriers and several common cardiovascular diseases (arteriosclerosis, myocardial infarction, myocardial hypertrophy). On this basis, the application of gene delivery nanocarriers in the treatment of these diseases is introduced in detail.
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Affiliation(s)
- Ling-Xin Shi
- State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
| | - Xiu-Ran Liu
- State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
| | - Ling-Yue Zhou
- State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
| | - Zi-Qi Zhu
- State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
| | - Qiong Yuan
- Department of Cardiology, The Affiliated Hospital of Southwest Medical University and Key Laboratory of Medical Electrophysiology, Ministry of Education & Medical Electrophysiological Key Laboratory of Sichuan Province, Institute of Cardiovascular Research and Institute of Metabolic Diseases, Southwest Medical University, Luzhou 646000, China
| | - Tao Zou
- State Key Laboratory of Refractories and Metallurgy, Key Laboratory of Coal Conversion & New Carbon Materials of Hubei Province, School of Chemistry and Chemical Engineering, Wuhan University of Science and Technology, Wuhan 430081, P. R. China.
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5
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Liu C, Guo X, Zhou Y, Wang H. AMPK Signalling Pathway: A Potential Strategy for the Treatment of Heart Failure with Chinese Medicine. J Inflamm Res 2023; 16:5451-5464. [PMID: 38026240 PMCID: PMC10676094 DOI: 10.2147/jir.s441597] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2023] [Accepted: 11/10/2023] [Indexed: 12/01/2023] Open
Abstract
Heart failure (HF) is a complex clinical syndrome that represents the advanced stage of cardiovascular disease, characterized by systolic and diastolic dysfunction of the heart. Despite continuous updates in HF treatment drugs, the morbidity and mortality rates remain high, necessitating ongoing exploration for new therapeutic targets. Adenosine monophosphate-activated protein kinase (AMPK) is the serine/threonine protein kinase which responds to adenosine monophosphate (AMP) levels.Activation of AMPK shifts cellular metabolic patterns from synthesis to catabolism, enhancing energy metabolism in pathological conditions such as inflammation, ischemia, obesity, and aging. Numerous studies have identified AMPK as a vital target for HF treatment, with herbal monomers/extracts and compounds affecting key signaling factors including rapamycin targeting protein (mTOR), silencing regulator protein 1 (SIRT1), nuclear transcription factor E2-related factor 2 (Nrf2), and nuclear transcription factor-κB (NF-κB) through regulation of the AMPK signaling pathway.This modulation can achieve the effects of improving metabolism, autophagy, reducing oxidative stress and inflammatory response in the treatment of heart failure, with the advantages of multi-targeting, comprehensive action and low toxicity.The modulation of the AMPK pathway by Traditional Chinese Medicine (TCM) has emerged as a crucial research direction for the prevention and treatment of HF, but a systematic summary and generalization in this field is lacking. This article provides an overview of the composition, regulation, and mechanism of the AMPK signaling pathway's influence on HF, as well as a summary of current research on the regulation of the AMPK pathway by TCM for HF prevention and treatment. The aim is to serve as a reference for the diagnosis and treatment of HF using TCM and the development of new drugs.
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Affiliation(s)
- Changxing Liu
- First Clinical Medical School, Heilongjiang University of Chinese Medicine, Harbin, 150040, People’s Republic of China
| | - Xinyi Guo
- Clinical Medical School, Chengdu University of Traditional Chinese Medicine, Chengdu, 610075, People’s Republic of China
| | - Yabin Zhou
- Department of Cardiology, The First Hospital of Heilongjiang University of Chinese Medicine, Harbin, 150040, People’s Republic of China
| | - He Wang
- Department of Cardiology, The First Hospital of Heilongjiang University of Chinese Medicine, Harbin, 150040, People’s Republic of China
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Bielawska M, Warszyńska M, Stefańska M, Błyszczuk P. Autophagy in Heart Failure: Insights into Mechanisms and Therapeutic Implications. J Cardiovasc Dev Dis 2023; 10:352. [PMID: 37623365 PMCID: PMC10456056 DOI: 10.3390/jcdd10080352] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/15/2023] [Accepted: 08/16/2023] [Indexed: 08/26/2023] Open
Abstract
Autophagy, a dynamic and complex process responsible for the clearance of damaged cellular components, plays a crucial role in maintaining myocardial homeostasis. In the context of heart failure, autophagy has been recognized as a response mechanism aimed at counteracting pathogenic processes and promoting cellular health. Its relevance has been underscored not only in various animal models, but also in the human heart. Extensive research efforts have been dedicated to understanding the significance of autophagy and unravelling its complex molecular mechanisms. This review aims to consolidate the current knowledge of the involvement of autophagy during the progression of heart failure. Specifically, we provide a comprehensive overview of published data on the impact of autophagy deregulation achieved by genetic modifications or by pharmacological interventions in ischemic and non-ischemic models of heart failure. Furthermore, we delve into the intricate molecular mechanisms through which autophagy regulates crucial cellular processes within the three predominant cell populations of the heart: cardiomyocytes, cardiac fibroblasts, and endothelial cells. Finally, we emphasize the need for future research to unravel the therapeutic potential associated with targeting autophagy in the management of heart failure.
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Affiliation(s)
- Magdalena Bielawska
- Department of Clinical Immunology, Jagiellonian University Medical College, University Children’s Hospital, Wielicka 265, 30-663 Cracow, Poland; (M.B.)
| | - Marta Warszyńska
- Department of Clinical Immunology, Jagiellonian University Medical College, University Children’s Hospital, Wielicka 265, 30-663 Cracow, Poland; (M.B.)
| | - Monika Stefańska
- Department of Clinical Immunology, Jagiellonian University Medical College, University Children’s Hospital, Wielicka 265, 30-663 Cracow, Poland; (M.B.)
| | - Przemysław Błyszczuk
- Department of Clinical Immunology, Jagiellonian University Medical College, University Children’s Hospital, Wielicka 265, 30-663 Cracow, Poland; (M.B.)
- Department of Rheumatology, University Hospital Zurich, University of Zurich, 8952 Schlieren, Switzerland
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7
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Razzaghi A, Choobineh S, Gaeini A, Soori R. Interaction of exercise training with taurine attenuates infarct size and cardiac dysfunction via Akt-Foxo3a-Caspase-8 signaling pathway. Amino Acids 2023:10.1007/s00726-023-03275-4. [PMID: 37204452 DOI: 10.1007/s00726-023-03275-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/29/2023] [Accepted: 05/04/2023] [Indexed: 05/20/2023]
Abstract
This research aimed to investigate the synergistic protective effect of exercise training and taurine on Akt-Foxo3a-Caspase-8 signaling related to infarct size and cardiac dysfunction. Therefore, 25 male Wistar rats with MI were divided into five groups: sham (Sh), control-MI(C-MI), exercise training-MI(Exe-MI), taurine supplementation-MI(Supp-MI), and exercise training + taurine-MI(Exe + Supp-MI). The taurine groups were given a 200 mg/kg/day dose of taurine by drinking water. Exercise training was conducted for 8 weeks (5 days/week), each session alternated 2 min with 25-30% VO2peak and 4 min with 55-60% VO2peak for 10 alternations. Then, the left ventricle tissue samples were taken from all groups. Exercise training and taurine activated Akt and decreased Foxo3a. Expression of the caspase-8 gene was increased in cardiac necrosis after MI, While, after 12 weeks of intervention decreased. Results exhibited that exercise training combined with taurine has a greater effect than either alone on activating the Akt-Foxo3a-caspase signaling pathway (P < 0.001). MI-induced myocardial injury leads to increase collagen deposition (P < 0.001) and infarct size and results in cardiac dysfunction via reduced stroke volume, ejection fraction, and fractional shortening (P < 0.001). Exercise training and taurine improved cardiac functional parameters (SV, EF, FS) and infarct size (P < 0.001) after 8 weeks of intervention in rats with MI. Also, the interaction of exercise training and taurine has a greater effect than alone on these variables. Interaction of exercise training with taurine supplementation induces a general amelioration of the cardiac histopathological profiles and improves cardiac remodeling via activating Akt-Foxo3a-Caspase-8 signaling with protective effects against MI.
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Affiliation(s)
| | - Siroos Choobineh
- Department of Exercise Physiology, University of Tehran, Tehran, Iran
| | - Abbasali Gaeini
- Department of Exercise Physiology, University of Tehran, Tehran, Iran
| | - Rahman Soori
- Department of Exercise Physiology, University of Tehran, Tehran, Iran
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8
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Steinert ND, Jorgenson KW, Lin KH, Hermanson JB, Lemens JL, Hornberger TA. A novel method for visualizing in-vivo rates of protein degradation provides insight into how TRIM28 regulates muscle size. iScience 2023; 26:106526. [PMID: 37070069 PMCID: PMC10105291 DOI: 10.1016/j.isci.2023.106526] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/13/2022] [Revised: 01/27/2023] [Accepted: 03/26/2023] [Indexed: 04/03/2023] Open
Abstract
Skeletal muscle size is controlled by the balance between protein synthesis and protein degradation. Given the essential role of skeletal muscle in maintaining a high quality of life, understanding the mechanisms that modulate this balance are of critical importance. Previously, we demonstrated that muscle-specific knockout of TRIM28 reduces muscle size and function and in the current study, we discovered that this effect is associated with an increase in protein degradation and a dramatic reduction in the expression of Mettl21c. Importantly, we also determined that overexpression of Mettl21c is sufficient to induce hypertrophy in both control and TRIM28 knockout muscles. Moreover, we developed a simple pulse-chase biorthogonal non-canonical amino acid tagging technique that enabled us to visualize the in vivo rate of protein degradation, and with this technique were able to conclude that the hypertrophic effect of Mettl21c is due, at least in part, to an inhibition of protein degradation.
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Affiliation(s)
- Nathaniel D. Steinert
- Department of Comparative Biosciences, University of Wisconsin - Madison, Madison, WI, USA
- School of Veterinary Medicine, University of Wisconsin - Madison, Madison, WI, USA
| | - Kent W. Jorgenson
- Department of Molecular and Cellular Pharmacology, University of Wisconsin - Madison, Madison, WI, USA
- School of Medicine and Public Health, University of Wisconsin - Madison, Madison, WI, USA
| | - Kuan-Hung Lin
- Department of Comparative Biosciences, University of Wisconsin - Madison, Madison, WI, USA
- School of Veterinary Medicine, University of Wisconsin - Madison, Madison, WI, USA
| | - Jake B. Hermanson
- Department of Comparative Biosciences, University of Wisconsin - Madison, Madison, WI, USA
- School of Veterinary Medicine, University of Wisconsin - Madison, Madison, WI, USA
| | - Jake L. Lemens
- Department of Comparative Biosciences, University of Wisconsin - Madison, Madison, WI, USA
- School of Veterinary Medicine, University of Wisconsin - Madison, Madison, WI, USA
| | - Troy A. Hornberger
- Department of Comparative Biosciences, University of Wisconsin - Madison, Madison, WI, USA
- School of Veterinary Medicine, University of Wisconsin - Madison, Madison, WI, USA
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9
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Sun Y, Wang H, Qu T, Luo J, An P, Ren F, Luo Y, Li Y. mTORC2: a multifaceted regulator of autophagy. Cell Commun Signal 2023; 21:4. [PMID: 36604720 PMCID: PMC9814435 DOI: 10.1186/s12964-022-00859-7] [Citation(s) in RCA: 10] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2021] [Accepted: 03/06/2022] [Indexed: 01/06/2023] Open
Abstract
Autophagy is a multi-step catabolic process that delivers cellular components to lysosomes for degradation and recycling. The dysregulation of this precisely controlled process disrupts cellular homeostasis and leads to many pathophysiological conditions. The mechanistic target of rapamycin (mTOR) is a central nutrient sensor that integrates growth signals with anabolism to fulfil biosynthetic and bioenergetic requirements. mTOR nucleates two distinct evolutionarily conserved complexes (mTORC1 and mTORC2). However, only mTORC1 is acutely inhibited by rapamycin. Consequently, mTORC1 is a well characterized regulator of autophagy. While less is known about mTORC2, the availability of acute small molecule inhibitors and multiple genetic models has led to increased understanding about the role of mTORC2 in autophagy. Emerging evidence suggests that the regulation of mTORC2 in autophagy is mainly through its downstream effector proteins, and is variable under different conditions and cellular contexts. Here, we review recent advances that describe a role for mTORC2 in this catabolic process, and propose that mTORC2 could be a potential clinical target for the treatment of autophagy-related diseases. Video abstract.
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Affiliation(s)
- Yanan Sun
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Huihui Wang
- grid.411734.40000 0004 1798 5176College of Food Science and Engineering, Gansu Agricultural University, Lanzhou, 730070 China
| | - Taiqi Qu
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Junjie Luo
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Peng An
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Fazheng Ren
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Yongting Luo
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
| | - Yixuan Li
- grid.22935.3f0000 0004 0530 8290Key Laboratory of Precision Nutrition and Food Quality, Department of Nutrition and Health, China Agricultural University, Beijing, 100083 China
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10
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Chang ZS, He ZM, Xia JB. FoxO3 Regulates the Progress and Development of Aging and Aging-Related Diseases. Curr Mol Med 2023; 23:991-1006. [PMID: 36239722 DOI: 10.2174/1566524023666221014140817] [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: 06/20/2022] [Revised: 09/04/2022] [Accepted: 09/06/2022] [Indexed: 11/22/2022]
Abstract
Aging is an inevitable risk factor for many diseases, including cardiovascular diseases, neurodegenerative diseases, cancer, and diabetes. Investigation into the molecular mechanisms involved in aging and longevity will benefit the treatment of age-dependent diseases and the development of preventative medicine for agingrelated diseases. Current evidence has revealed that FoxO3, encoding the transcription factor (FoxO)3, a key transcription factor that integrates different stimuli in the intrinsic and extrinsic pathways and is involved in cell differentiation, protein homeostasis, stress resistance and stem cell status, plays a regulatory role in longevity and in age-related diseases. However, the precise mechanisms by which the FoxO3 transcription factor modulates aging and promotes longevity have been unclear until now. Here, we provide a brief overview of the mechanisms by which FoxO3 mediates signaling in pathways involved in aging and aging-related diseases, as well as the current knowledge on the role of the FoxO3 transcription factor in the human lifespan and its clinical prospects. Ultimately, we conclude that FoxO3 signaling pathways, including upstream and downstream molecules, may be underlying therapeutic targets in aging and age-related diseases.
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Affiliation(s)
- Zao-Shang Chang
- Department of Physiology, School of Basic Medical Sciences, Shaoyang University, Shaoyang 422000, Hunan, China
| | - Zhi-Ming He
- Department of Physiology, School of Basic Medical Sciences, Shaoyang University, Shaoyang 422000, Hunan, China
| | - Jing-Bo Xia
- Guangdong Provincial Key Laboratory of Physical Activity and Health Promotion, Guangzhou Sport University, Guangzhou 510500, Guangdong, China
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11
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Facilitating Mitophagy via Pink1/Parkin2 Signaling Is Essential for the Neuroprotective Effect of β-Caryophyllene against CIR-Induced Neuronal Injury. Brain Sci 2022; 12:brainsci12070868. [PMID: 35884674 PMCID: PMC9313355 DOI: 10.3390/brainsci12070868] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2022] [Revised: 06/27/2022] [Accepted: 06/28/2022] [Indexed: 12/01/2022] Open
Abstract
Mitophagy is an important mechanism for maintaining mitochondrial homeostasis through elimination of damaged or dysfunctional mitochondria following cerebral ischemia-reperfusion (CIR) injury. β-Caryophyllene (BCP) is a natural sesquiterpene compound found in the essential oil of plants and has been shown to ameliorate CIR injury. However, whether BCP protects neurons from CIR injury by activating mitophagy is still unclear, and the underlying mechanism remains unknown. In the present study, a mouse neuron HT-22 cell of oxygen-glucose deprivation/reoxygenation (OGD/R) and C57BL/6 male mouse of transient middle artery occlusion followed by 24 h reperfusion (MCAO/R) were established the model of CIR injury. Our results show that BCP remarkably protected against cell death and apoptosis induced by OGD/R, and decreased neurologic injury, infarct volume, and the injury of neurons in CA1 region on MCAO/R mice. In addition, BCP accelerated mitophagy by regulating expression of mitochondrial autophagy marker molecules and the mt-Atp6/Rpl13 ratio (reflecting the relative number of mitochondria), and promoting autophagosome formation compared with OGD/R and MCAO/R groups both in vitro and in vivo. Furthermore, this study revealed that BCP pre-treatment could activate the Pink1/Parkin2 signaling pathway, also with mitophagy activation. To explore the mechanisms, mitochondrial division inhibitor-1 (Mdivi-1) was used to investigate the role of BCP in CIR injury. We found that Mdivi-1 not only decreased BCP-induced facilitation of mitophagy, but also significantly weakened BCP-induced protection against OGD/R and MCAO/R models, which was consistent with levels of Pink1/Parkin2 signaling pathway. Taken together, these results suggest that facilitating mitophagy via Pink1/Parkin2 signaling is essential for the neuroprotective effect of BCP against CIR injury.
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12
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Chen D, Yu W, Zhong C, Hong Q, Huang G, Que D, Wang Y, Yang Y, Rui B, Zhuang Z, Liang M, Ye Z, Yan X, Lv J, Zhang R, Yan J, Yang P. Elabela ameliorates doxorubicin-induced cardiotoxicity by promoting autophagic flux through TFEB pathway. Pharmacol Res 2022; 178:106186. [PMID: 35306141 DOI: 10.1016/j.phrs.2022.106186] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/30/2022] [Revised: 03/08/2022] [Accepted: 03/15/2022] [Indexed: 12/16/2022]
Abstract
Doxorubicin (DOX) is a widely used and effective antineoplastic drug; however, its clinical application is limited by cardiotoxicity. A safe and effective strategy to prevent from doxorubicin-induced cardiotoxicity (DIC) is still beyond reach. Elabela (ELA), a new APJ ligand, has exerted cardioprotective effect against multiple cardiovascular diseases. Here, we asked whether ELA alleviates DIC. Mice were injected with DOX to established acute DIC. In vivo studies were assessed with echocardiography, serum cTnT and CK-MB, HW/BW ratio and WGA staining. Cell death and atrophy were measured by AM/PI staining and phalloidin staining respectively in vitro. Autophagic flux was monitored with Transmission electron microscopy in vivo, as well as LysoSensor and mRFP-GFP-LC3 puncta in vitro. Our results showed that ELA improved cardiac dysfunction in DIC mice. ELA administration also attenuated cell death and atrophy in DOX-challenged neonatal rat cardiomyocytes (NRCs). Additionally, we found that ELA restored DOX-induced autophagic flux blockage, which was evidenced by the reverse of p62 and LC3II, improvement of lysosome function and accelerated degradation of accumulated autolysosomes. Chloroquine, a classical autophagic flux inhibitor, blunted the improvement of ELA on cardiac dysfunction. At last, we revealed that ELA reversed DOX-induced downregulation of transcription factor EB (TFEB), and silencing TFEB by siRNA abrogated the effects of ELA on autophagic flux as well as cell death and atrophy in NRCs. In conclusion, this study indicated that ELA ameliorated DIC through enhancing autophagic flux via activating TFEB. ELA may become a potential target against DIC.
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Chemotherapy-Free Targeted Anti-BCR-ABL+ Acute Lymphoblastic Leukemia Therapy May Benefit the Heart. Cancers (Basel) 2022; 14:cancers14040983. [PMID: 35205731 PMCID: PMC8870618 DOI: 10.3390/cancers14040983] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/15/2021] [Revised: 02/03/2022] [Accepted: 02/10/2022] [Indexed: 02/05/2023] Open
Abstract
Simple Summary Risk-adapted multiagent chemotherapy has led to a remarkable improvement in the life expectancy of patients with acute lymphoblastic leukemia (ALL). Nevertheless, in high-risk subgroups such as BCR-ABL+ ALL, relapse rates remain high without allogeneic hematopoietic stem cell transplantation, and the adverse effects of chemotherapy may cause acute and chronic cardiac complications or dysfunction. Here, we demonstrated that chemotherapy-free targeted therapies designed to optimize apoptosis induction in BCR-ABL+ ALL may circumvent cardiac on-target side effects and may even activate cardiac recovery. Abstract Targeted therapies are currently considered the best cost–benefit anti-cancer treatment. In hematological malignancies, however, relapse rates and non-hematopoietic side effects including cardiotoxicity remain high. Here, we describe significant heart damage due to advanced acute lymphoblastic leukemia (ALL) with t(9;22) encoding the bcr-abl oncogene (BCR-ABL+ ALL) in murine xenotransplantation models. Echocardiography reveals severe cardiac dysfunction with impaired left ventricular function and reduced heart and cardiomyocyte dimensions associated with increased apoptosis. This cardiac damage is fully reversible, but cardiac recovery depends on the therapy used to induce ALL remission. Chemotherapy-free combination therapy with dasatinib (DAS), venetoclax (VEN) (targeting the BCR-ABL oncoprotein and mitochondrial B-cell CLL/Lymphoma 2 (BCL2), respectively), and dexamethasone (DEX) can fully revert cardiac defects, whereas the depletion of otherwise identical ALL in a genetic model using herpes simplex virus type 1 thymidine kinase (HSV-TK) cannot. Mechanistically, dexamethasone induces a pro-apoptotic BCL2-interacting mediator of cell death (BIM) expression and apoptosis in ALL cells but enhances pro-survival B-cell lymphoma extra-large (BCLXL) expression in cardiomyocytes and clinical recovery with the reversion of cardiac atrophy. These data demonstrate that therapies designed to optimize apoptosis induction in ALL may circumvent cardiac on-target side effects and may even activate cardiac recovery. In the future, combining the careful clinical monitoring of cardiotoxicity in leukemic patients with the further characterization of organ-specific side effects and signaling pathways activated by malignancy and/or anti-tumor therapies seems reasonable.
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Manola MS, Gumeni S, Trougakos IP. Differential Dose- and Tissue-Dependent Effects of foxo on Aging, Metabolic and Proteostatic Pathways. Cells 2021; 10:cells10123577. [PMID: 34944088 PMCID: PMC8700554 DOI: 10.3390/cells10123577] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2021] [Revised: 12/09/2021] [Accepted: 12/11/2021] [Indexed: 02/07/2023] Open
Abstract
Aging is the gradual deterioration of physiological functions that culminates in death. Several studies across a wide range of model organisms have revealed the involvement of FOXO (forkhead box, class O) transcription factors in orchestrating metabolic homeostasis, as well as in regulating longevity. To study possible dose- or tissue-dependent effects of sustained foxo overexpression, we utilized two different Drosophila transgenic lines expressing high and relatively low foxo levels and overexpressed foxo, either ubiquitously or in a tissue-specific manner. We found that ubiquitous foxo overexpression (OE) accelerated aging, induced the early onset of age-related phenotypes, increased sensitivity to thermal stress, and deregulated metabolic and proteostatic pathways; these phenotypes were more intense in transgenic flies expressing high levels of foxo. Interestingly, there is a defined dosage of foxo OE in muscles and cardiomyocytes that shifts energy resources into longevity pathways and thus ameliorates not only tissue but also organismal age-related defects. Further, we found that foxo OE stimulates in an Nrf2/cncC dependent-manner, counteracting proteostatic pathways, e.g., the ubiquitin-proteasome pathway, which is central in ameliorating the aberrant foxo OE-mediated toxicity. These findings highlight the differential dose- and tissue-dependent effects of foxo on aging, metabolic and proteostatic pathways, along with the foxo-Nrf2/cncC functional crosstalk.
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15
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Abstract
Objective Arteriovenous fistulae (AVF) placed for hemodialysis have high flow rates that can stimulate left ventricular (LV) hypertrophy. LV hypertrophy generally portends poor cardiac outcomes, yet clinical studies point to superior cardiac-specific outcomes for patients with AVF when compared with other dialysis modalities. We hypothesize that AVF induce physiologic cardiac hypertrophy with cardioprotective features. Methods We treated 9- to 11-week-old C57Bl/6 male and female mice with sham laparotomy or an aortocaval fistula via a 25G needle. Cardiac chamber size and function were assessed with serial echocardiography, and cardiac computed tomography angiography. Hearts were harvested at 5 weeks postoperatively, and the collagen content was assessed with Masson's trichrome. Bulk messenger RNA sequencing was performed from LV of sham and AVF mice at 10 days. Differentially expressed genes were analyzed using Ingenuity Pathway Analysis (Qiagen) to identify affected pathways and predict downstream biological effects. Results Mice with AVF had similar body weight and wet lung mass, but increased cardiac mass compared with sham-operated mice. AVF increased cardiac output while preserving LV systolic and diastolic function, as well as indices of right heart function; all four cardiac chambers were enlarged, with a slight decrement in the relative LV wall thickness. Histology showed preserved collagen density within each of the four chambers without areas of fibrosis. RNA sequencing captured 19 384 genes, of which 857 were significantly differentially expressed, including transcripts from extracellular matrix-related genes, ion channels, metabolism, and cardiac fetal genes. The top upstream regulatory molecules predicted include activation of angiogenic (Vegf, Akt1), procardiomyocyte survival (Hgf, Foxm1, Erbb2, Lin9, Areg), and inflammation-related (CSF2, Tgfb1, TNF, Ifng, Ccr2, IL6) genes, as well as the inactivation of cardiomyocyte antiproliferative factors (Cdkn1a, FoxO3, α-catenin). The predicted downstream effects include a decrease in heart damage, and increased arrhythmia, angiogenesis, and cardiogenesis. There were no significant sex-dependent differences in the AVF-stimulated cardiac adaptation. Conclusions AVF stimulate adaptive cardiac hypertrophy in wild-type mice without heart failure or pathologic fibrosis. Transcriptional correlates suggest AVF-induced cardiac remodeling has some cardioprotective, although also arrhythmogenic features. (JVS–Vascular Science 2021;2:110-28.) Clinical Relevance Arteriovenous fistulae (AVF) are commonly used as access for hemodialysis in patients with end-stage renal disease. AVF induce a high-output state that is associated with long-term structural cardiac remodeling, including left ventricle hypertrophy, but this element has uncertain clinical significance. Although left ventricle hypertrophy has traditionally been associated with an increased risk of cardiovascular disease, clinical studies have suggested that cardiac-specific outcomes of patients with end-stage renal disease were better with AVF compared with other dialysis modalities. This study uses a mouse model of AVF to study the structural, functional, and molecular correlates of AVF-induced cardiac remodeling. It finds that AVF causes an adaptive cardiac hypertrophy without functional decline or fibrosis. Transcriptional correlates suggest an electrical remodeling and the upregulation of proangiogenic, procardiogenic, and prosurvival factors, implying that AVF-induced cardiac hypertrophy is potentially cardioprotective, but also arrhythmogenic.
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16
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Klinpudtan N, Allsopp RC, Kabayama M, Godai K, Gondo Y, Masui Y, Akagi Y, Srithumsuk W, Sugimoto K, Akasaka H, Takami Y, Takeya Y, Yamamoto K, Ikebe K, Yasumoto S, Ogawa M, Ishizaki T, Arai Y, Rakugi H, Chen R, Willcox BJ, Willcox DC, Kamide K. The association between longevity associated FOXO3 allele and heart disease in Septuagenarians and Octogenarians: The SONIC study. J Gerontol A Biol Sci Med Sci 2021; 77:1542-1548. [PMID: 34254639 PMCID: PMC9373940 DOI: 10.1093/gerona/glab204] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2021] [Indexed: 01/22/2023] Open
Abstract
The G allele of FOXO3 gene (single-nucleotide polymorphism; rs2802292) is strongly associated with human longevity. However, knowledge of the effect of FOXO3 in older populations, men or women, with heart disease is limited. This cross-sectional study in Japan included 1836 older adults in the 70- and 80-year-old groups. DNA samples isolated from buffy coat samples of peripheral blood were used to genotype FOXO3 (rs2802292). Self-reports were used to obtain heart disease data according to physician diagnosis. Multiple logistic regression was used to test the association by adjusting for the traditional risk factor of heart disease. The prevalence of heart disease in women FOXO3 G-allele carriers was higher than noncarriers (16.7% vs 11.6%, p = .022). The prevalence of coronary heart disease was lower for FOXO3 G carriers in the 70-year-old group for both sexes (men: 9.3% vs 4.3%, p = .042 and women: 10% vs 9%, p = .079, respectively). The G allele was negatively associated with heart disease after adjusting for diabetes, hypertension, dyslipidemia, and smoking in men (odds ratio [OR] = 0.70, 95% confidence intervals [CIs], 0.49–0.99, p = .046), although the association was weaker after full adjustment. In contrast, women carriers of the FOXO3 G allele showed a positive association with heart disease after total adjustment (OR = 1.49, 95% CI, 1.00–2.21, p = .049). In conclusion, the longevity-associated G allele of FOXO3 was observed to have contrasting associations with heart disease prevalence according to sex in older Japanese. To further confirm this association, a longitudinal study and a large sample size will be required.
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Affiliation(s)
- Nonglak Klinpudtan
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Richard C Allsopp
- Institute for Biogenesis Research, Department of Anatomy Biochemistry and Physiology, John A. Burns School of Medicine, University of Hawaii, Honolulu, HI, USA
| | - Mai Kabayama
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kayo Godai
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasuyuki Gondo
- Department of Clinical Thanatology and Geriatric Behavioral Science, Graduate School of Human Sciences, Osaka University, Osaka, Japan
| | - Yukie Masui
- Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - Yuya Akagi
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Werayuth Srithumsuk
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Ken Sugimoto
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Hiroshi Akasaka
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yoichi Takami
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Yasushi Takeya
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Koichi Yamamoto
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Kazunori Ikebe
- Department of Prosthodontics, Gerodontology and Oral Rehabilitation, Graduate School of Dentistry, Osaka University, Osaka, Japan
| | - Saori Yasumoto
- Department of Clinical Thanatology and Geriatric Behavioral Science, Graduate School of Human Sciences, Osaka University, Osaka, Japan
| | - Madoka Ogawa
- Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - Tatsuro Ishizaki
- Tokyo Metropolitan Geriatric Hospital and Institute of Gerontology, Tokyo, Japan
| | - Yasumichi Arai
- Center for Supercentenarian Medical Research, Keio University School of Medicine, Tokyo, Japan
| | - Hiromi Rakugi
- Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
| | - Randi Chen
- Kuakini Medical Center, Honolulu, Hawaii, USA
| | - Bradley J Willcox
- Kuakini Medical Center, Honolulu, Hawaii, USA.,Department of Geriatric Medicine, John A. Burns School of Medicine, University of Hawaii Honolulu, HI, USA
| | - D Craig Willcox
- Kuakini Medical Center, Honolulu, Hawaii, USA.,Department of Geriatric Medicine, John A. Burns School of Medicine, University of Hawaii Honolulu, HI, USA.,Okinawa International University, Okinawa, Japan
| | - Kei Kamide
- Department of Health Promotion System Sciences, Division of Health Sciences, Graduate School of Medicine, Osaka University, Osaka, Japan.,Department of Geriatric and General Medicine, Graduate School of Medicine, Osaka University, Osaka, Japan
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Vanhoutte D, Schips TG, Vo A, Grimes KM, Baldwin TA, Brody MJ, Accornero F, Sargent MA, Molkentin JD. Thbs1 induces lethal cardiac atrophy through PERK-ATF4 regulated autophagy. Nat Commun 2021; 12:3928. [PMID: 34168130 PMCID: PMC8225674 DOI: 10.1038/s41467-021-24215-4] [Citation(s) in RCA: 57] [Impact Index Per Article: 19.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/17/2019] [Accepted: 05/31/2021] [Indexed: 02/05/2023] Open
Abstract
The thrombospondin (Thbs) family of secreted matricellular proteins are stress- and injury-induced mediators of cellular attachment dynamics and extracellular matrix protein production. Here we show that Thbs1, but not Thbs2, Thbs3 or Thbs4, induces lethal cardiac atrophy when overexpressed. Mechanistically, Thbs1 binds and activates the endoplasmic reticulum stress effector PERK, inducing its downstream transcription factor ATF4 and causing lethal autophagy-mediated cardiac atrophy. Antithetically, Thbs1-/- mice develop greater cardiac hypertrophy with pressure overload stimulation and show reduced fasting-induced atrophy. Deletion of Thbs1 effectors/receptors, including ATF6α, CD36 or CD47 does not diminish Thbs1-dependent cardiac atrophy. However, deletion of the gene encoding PERK in Thbs1 transgenic mice blunts the induction of ATF4 and autophagy, and largely corrects the lethal cardiac atrophy. Finally, overexpression of PERK or ATF4 using AAV9 gene-transfer similarly promotes cardiac atrophy and lethality. Hence, we identified Thbs1-mediated PERK-eIF2α-ATF4-induced autophagy as a critical regulator of cardiomyocyte size in the stressed heart.
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Affiliation(s)
- Davy Vanhoutte
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Tobias G Schips
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Janssen Pharmaceuticals, Spring House, PA, USA
| | - Alexander Vo
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Kelly M Grimes
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Tanya A Baldwin
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Matthew J Brody
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department of Pharmacology, University of Michigan, Ann Arbor, MI, USA
| | - Federica Accornero
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
- Department Physiology and Cell Biology, The Ohio State University, Columbus, OH, USA
| | - Michelle A Sargent
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA
| | - Jeffery D Molkentin
- Department of Pediatrics, University of Cincinnati, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
- Howard Hughes Medical Institute, Cincinnati Children's Hospital Medical Center, Cincinnati, OH, USA.
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18
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Huang Y, Gao X, Zhou X, Zhang Y, Tan Z, Zhu S. Remote Ischemic Postconditioning Inhibited Mitophagy to Achieve Neuroprotective Effects in the Rat Model of Cardiac Arrest. Neurochem Res 2021; 46:573-583. [PMID: 33409854 DOI: 10.1007/s11064-020-03193-x] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/24/2020] [Revised: 11/08/2020] [Accepted: 12/04/2020] [Indexed: 10/22/2022]
Abstract
Remote ischemic postconditioning (RI-postC) is an effective measure to improve nerve function after cardiac arrest. However, the brain protective mechanism of RI-postC has not been fully elucidated, and whether it is related to mitophagy is unclear. In this study, we used the rat model of cardiac arrest to study the effect of RI-postC on mitophagy and explore its possible signaling pathways. Rats were randomly divided into Sham group, CA/CPR group, Mdivi-1 group and RI-postC group. The animal model of cardiac arrest was established by asphyxia. RI-postC was performed by clamping and loosening the left femoral artery. Mdivi-1 was treated with a single intravenous injection. Levels of TOMM20, TIM23, Mfn1, PINK1 and parkin were detected by western blots. Mitochondrial membrane potential was measured by flow cytometry. Real-time PCR was used to detect relative mitochondrial DNA levels. The apoptosis of hippocampal neurons was detected by flow and TUNEL. In addition, Histopathological tests were performed. The results showed that RI-postC was similar to the mitophagy inhibitor Mdivi-1, which could inhibit the decrease of mitophagy-related protein level, improve mitochondrial membrane potential and up-regulate the ratio of mt-Atp6/Rpl13 after cardiopulmonary resuscitation (CPR). Furthermore, RI-postC could also reduce the rate of hippocampal nerve apoptosis and the damage of hippocampal neurons after CPR. Moreover, RI-postC and Mdivi-1 could reduce the protein levels of PINK1 and parkin in mitochondria after CPR, while increasing PINK1 levels in the cytoplasm. These findings suggested that RI-postC could inhibit the overactivation mitophagy through the PINK1/parkin signaling pathway, thus providing neuroprotective effects.
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Affiliation(s)
- Yang Huang
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - Xuhui Gao
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - Xiang Zhou
- Department of Anesthesiology, General Hospital of Central Theater Command, Wuhan, China
| | - Yu Zhang
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - ZhiTian Tan
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China
| | - ShuiBo Zhu
- The First School of Clinical Medical, Southern Medical University, Guangzhou, China.
- Department of Thoracic Cardiovascular Surgery, General Hospital of Central Theater Command, Wuluo road, 627#, Wuhan, 430070, Hubei, China.
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19
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Role of FoxO transcription factors in aging-associated cardiovascular diseases. VITAMINS AND HORMONES 2021; 115:449-475. [PMID: 33706958 DOI: 10.1016/bs.vh.2020.12.018] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
Abstract
Aging constitutes a major risk factor toward the development of cardiovascular diseases (CVDs). The aging heart undergoes several changes at the molecular, cellular and physiological levels, which diminishes its contractile function and weakens stress tolerance. Further, old age increases the exposure to risk factors such as hypertension, diabetes and hypercholesterolemia. Notably, research in the past decades have identified FoxO subfamily of the forkhead transcription factors as key players in regulating diverse cellular processes linked to cardiac aging and diseases. In the present chapter, we discuss the important role of FoxO in the development of various aging-associated cardiovascular complications such as cardiac hypertrophy, cardiac fibrosis, heart failure, vascular dysfunction, atherosclerosis, hypertension and myocardial ischemia. Besides, we will also discuss the role of FoxO in cardiometabolic alterations, autophagy and proteasomal degradation, which are implicated in aging-associated cardiac dysfunction.
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20
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Rubio B, Mora C, Pintado C, Mazuecos L, Fernández A, López V, Andrés A, Gallardo N. The nutrient sensing pathways FoxO1/3 and mTOR in the heart are coordinately regulated by central leptin through PPARβ/δ. Implications in cardiac remodeling. Metabolism 2021; 115:154453. [PMID: 33249043 DOI: 10.1016/j.metabol.2020.154453] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/11/2020] [Accepted: 11/23/2020] [Indexed: 10/22/2022]
Abstract
BACKGROUND Cardiovascular disease in obese individuals with type 2 diabetes is often associated with hyperleptinemia and leptin resistance, while other studies support that leptin has cardioprotective effects. Besides, the role of leptin in regulating cardiac atrophy or hypertrophy remains to be clearly defined. In fact, in rats with normal leptin sensitivity, the molecular underpinnings of the effects of central leptin regulating cardiac structural pathways remain poorly understood. OBJECTIVE Hence, we assessed the effects of intracerebroventricular (icv) leptin infusion on cardiac remodeling analyzing FOXO1/3 and mTORC1 pathways, focusing special attention to PPARβ/δ as mediator of central leptin's effects on cardiac metabolism. METHODS Male 3-months-old Wistar rats, infused with icv leptin (0.2 μg/day) for 7 days, were daily co-treated intraperitoneally with the specific PPARβ/δ antagonist GSK0660, at 1 mg/kg per day along leptin treatment. RESULTS Central leptin regulated dynamically, in an opposite manner, the network between FOXOs and mTORC1 and induced an atrophy-related gene program in cardiac tissue. Leptin activated the anti-hypertrophic kinase GSK3β and increased the protein levels of muscle-specific ubiquitin ligases, muscle RING finger 1 (MuRF1) and muscle atrophy F-box (MAFbx)/Atrogin-1 involved in limiting cardiac hypertrophy. FOXO1 activity and the expression of their target genes, Sod2 and Lpl, were also increased in the heart upon central leptin infusion. Besides, Beclin-1 and LC3B-II, gene products of the autophagic pathway response, were upregulated, while the content and expression levels of phenotypic markers of cardiac hypertrophy as ANP and β-myosin heavy chain, gene product of Myh7 were significantly decreased. On the other hand, mTORC1 activity and OXPHOS protein levels were decreased suggesting a key role of central leptin preventing cardiac oxidative stress. In fact, the content of carbonylated proteins, TBARS and ROS/RSN were not increased in cardiac tissue in response to central leptin infusion. Finally, the pharmacological inhibition of PPARβ/δ, via in vivo administration of the selective antagonist GSK0660, blunted the induction of FOXO1/3, Atrogin-1, MuRF1 and GSK3β in the heart mediated by icv leptin infusion. CONCLUSIONS Our results demonstrate that, in lean rats with normal leptin sensitivity, central leptin regulates nutrient sensing pathways in heart contributing to balance cardiac remodeling through the anti- and pro-hypertrophic programs, and in this process is involved PPARβ/δ.
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Affiliation(s)
- Blanca Rubio
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - Cristina Mora
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - Cristina Pintado
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Environmental Sciences and Biochemistry, Avda. Carlos III s/n, 45071 Toledo, Spain
| | - Lorena Mazuecos
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - Alejandro Fernández
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - Virginia López
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain
| | - Antonio Andrés
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain.
| | - Nilda Gallardo
- Universidad de Castilla-La Mancha, Regional Centre for Biomedical Research, Spain; Universidad de Castilla-La Mancha, Biochemistry Section, Faculty of Science and Chemical Technologies, Avda Camilo José Cela 10, 13071 Ciudad Real, Spain.
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21
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Ausoni S, Calamelli S, Saccà S, Azzarello G. How progressive cancer endangers the heart: an intriguing and underestimated problem. Cancer Metastasis Rev 2021; 39:535-552. [PMID: 32152913 DOI: 10.1007/s10555-020-09869-8] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Since it came into being as a discipline, cardio-oncology has focused on the prevention and treatment of cardiotoxicity induced by antitumor chemotherapy and radiotherapy. Over time, it has been proved that even more detrimental is the direct effect generated by cancer cells that release pro-cachectic factors in the bloodstream. Secreted molecules target different organs at a distance, including the heart. Inflammatory and neuronal modulators released by the tumor bulk, either as free molecules or through exosomes, contribute to the pathogenesis of cardiac disease. Progressive cancer causes cachexia and severe cardiac muscle wasting accompanied by cardiomyocyte atrophy, tissue fibrosis, and several functional impairments up to heart failure. The molecular mechanisms responsible for such a cardiac muscle wasting have been partially elucidated in animal models, but minimally investigated in humans, although severe cardiac dysfunction exacerbates global cachexia and hampers efficient anti-cancer treatments. This review provides an overview of cancer-induced structural cardiac and functional damage, drawing on both clinical and scientific research. We start by looking at the pathophysiological mechanisms and evolving epidemiology and go on to discuss prevention, diagnosis, and a multimodal policy of intervention aimed at providing overall prognosis and global care for patients. Despite much interest in the cardiotoxicity of cancer therapies, the direct tumor effect on the heart remains poorly explored. There is still a lack of diagnostic criteria for the identification of the early stages of cardiac disease in cancer patients, while the possibilities that there are for effective prevention are largely underestimated. Research on innovative therapies has claimed considerable advances in preclinical studies, but none of the molecular targets suitable for clinical application has been approved for therapy. These issues are critically discussed here.
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Affiliation(s)
- Simonetta Ausoni
- Department of Biomedical Sciences, University of Padua, Padova, Italy.
| | - Sara Calamelli
- Department of Cardiology, Local Health Unit 3 Serenissima, Mirano Hospital, Mirano, Venice, Italy
| | - Salvatore Saccà
- Department of Cardiology, Local Health Unit 3 Serenissima, Mirano Hospital, Mirano, Venice, Italy
| | - Giuseppe Azzarello
- Department of Medical Oncology, Local Health Unit 3 Serenissima, Mirano Hospital, Mirano, Venice, Italy.
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22
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Zhang L, Wang Y, Zhang Y, Zhao Y, Li P. Pathogenic mechanisms and the potential clinical value of circFoxo3 in cancers. MOLECULAR THERAPY. NUCLEIC ACIDS 2021; 23:908-917. [PMID: 33614239 PMCID: PMC7868936 DOI: 10.1016/j.omtn.2021.01.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Circular RNAs (circRNAs) are covalently closed circular structures that can function in various physiological and pathological processes by acting as microRNA (miRNA) sponges, RNA-binding protein (RBP) sponges, mRNA transcriptional regulators, and protein translational templates. circFoxo3 is one of the most studied circRNAs and is generated from the tumor suppressor gene Foxo3. Increasing studies have demonstrated the multiple functions of circFoxo3 in the pathogenesis of different cancer types. circFoxo3 plays important roles in cancer development mainly by binding to various miRNAs. The diagnostic potential of circFoxo3 has been revealed in several cancers. Some research results have been found to contradict the results of other studies, and this may be due to insufficient sample sizes and inconsistencies in the experimental and nomenclature methods. In this review, we systematically summarize current knowledge about the biogenesis and functions of circRNAs, elucidate the roles of circFoxo3 in different cancers, and explore the clinical applications of circFoxo3.
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Affiliation(s)
- Lei Zhang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, NO38 DengZhou Road, Qingdao 266021, China
| | - Yin Wang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, NO38 DengZhou Road, Qingdao 266021, China
| | - Yuan Zhang
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, NO38 DengZhou Road, Qingdao 266021, China
| | - Yanfang Zhao
- Institute of Biomedical Research, School for Life Science, Shandong University of Technology, 266 Xincun West Road, Zibo 255000, China
| | - Peifeng Li
- Institute for Translational Medicine, The Affiliated Hospital of Qingdao University, Qingdao University, NO38 DengZhou Road, Qingdao 266021, China
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23
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Understanding the common mechanisms of heart and skeletal muscle wasting in cancer cachexia. Oncogenesis 2021; 10:1. [PMID: 33419963 PMCID: PMC7794402 DOI: 10.1038/s41389-020-00288-6] [Citation(s) in RCA: 53] [Impact Index Per Article: 17.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 10/26/2020] [Accepted: 11/02/2020] [Indexed: 12/12/2022] Open
Abstract
Cachexia is a severe complication of cancer that adversely affects the course of the disease, with currently no effective treatments. It is characterized by a progressive atrophy of skeletal muscle and adipose tissue, resulting in weight loss, a reduced quality of life, and a shortened life expectancy. Although the cachectic condition primarily affects the skeletal muscle, a tissue that accounts for ~40% of total body weight, cachexia is considered a multi-organ disease that involves different tissues and organs, among which the cardiac muscle stands out for its relevance. Patients with cancer often experience severe cardiac abnormalities and manifest symptoms that are indicative of chronic heart failure, including fatigue, shortness of breath, and impaired exercise tolerance. Furthermore, cardiovascular complications are among the major causes of death in cancer patients who experienced cachexia. The lack of effective treatments for cancer cachexia underscores the need to improve our understanding of the underlying mechanisms. Increasing evidence links the wasting of the cardiac and skeletal muscles to metabolic alterations, primarily increased energy expenditure, and to increased proteolysis, ensuing from activation of the major proteolytic machineries of the cell, including ubiquitin-dependent proteolysis and autophagy. This review aims at providing an overview of the key mechanisms of cancer cachexia, with a major focus on those that are shared by the skeletal and cardiac muscles.
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24
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Li Z, Meng Y, Liu C, Liu H, Cao W, Tong C, Lu M, Li L, Peng L. Kcnh2 mediates FAK/AKT-FOXO3A pathway to attenuate sepsis-induced cardiac dysfunction. Cell Prolif 2020; 54:e12962. [PMID: 33263944 PMCID: PMC7848965 DOI: 10.1111/cpr.12962] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2020] [Revised: 11/03/2020] [Accepted: 11/13/2020] [Indexed: 12/29/2022] Open
Abstract
Objectives Myocardial dysfunction is a significant manifestation in sepsis, which results in high mortality. Even Kcnh2 has been hinted to associate with the pathological process, its involved signalling is still elusive. Materials and methods The caecal ligation puncture (CLP) surgery or lipopolysaccharide (LPS) injection was performed to induce septic cardiac dysfunction. Western blotting was used to determine KCNH2 expression. Cardiac function was examined by echocardiography 6 hours after CLP and LPS injection in Kcnh2 knockout (Kcnh2+/‐) and NS1643 injection rats (n ≥ 6/group). Survival was monitored following CLP‐induced sepsis (n ≥ 8/group). Results Sepsis could downregulate KCNH2 level in the rat heart, as well as in LPS‐stimulated cardiomyocytes but not cardiac fibroblast. Defect of Kcnh2 (Kcnh2+/‐) significantly aggravated septic cardiac dysfunction, exacerbated tissue damage and increased apoptosis under LPS challenge. Fractional shortening and ejection fraction values were significantly decreased in Kcnh2+/‐ group than Kcnh2+/+ group. Survival outcome in Kcnh2+/‐ septic rats was markedly deteriorated, compared with Kcnh2+/+ rats. Activated Kcnh2 with NS1643, however, resulted in opposite effects. Lack of Kcnh2 caused inhibition of FAK/AKT signalling, reflecting in an upregulation for FOXO3A and its downstream targets, which eventually induced cardiomyocyte apoptosis and heart tissue damage. Either activation of AKT by activator or knockdown of FOXO3A with si‐RNA remarkably attenuated the pathological manifestations that Kcnh2 defect mediated. Conclusion Kcnh2 plays a protection role in sepsis‐induced cardiac dysfunction (SCID) via regulating FAK/AKT‐FOXO3A to block LPS‐induced myocardium apoptosis, indicating a potential effect of the potassium channels in pathophysiology of SCID.
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Affiliation(s)
- Zhigang Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - Yilei Meng
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - Chang Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Huan Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - Wenze Cao
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China
| | - Chang Tong
- Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Min Lu
- Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Li Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China.,Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Beijing, China
| | - Luying Peng
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Institute of Medical Genetics, Tongji University, Shanghai, China.,Heart Health Center, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Department of Medical Genetics, Tongji University School of Medicine, Shanghai, China.,Research Units of Origin and Regulation of Heart Rhythm, Chinese Academy of Medical Sciences, Beijing, China
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25
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Abstract
FOXO proteins are transcription factors that are involved in numerous physiological processes and in various pathological conditions, including cardiovascular disease, cancer, diabetes and chronic neurological diseases. For example, FOXO proteins are context-dependent tumour suppressors that are frequently inactivated in human cancers, and FOXO3 is the second most replicated gene associated with extreme human longevity. Therefore, pharmacological manipulation of FOXO proteins is a promising approach to developing therapeutics for cancer and for healthy ageing. In this Review, we overview the role of FOXO proteins in health and disease and discuss the pharmacological approaches to modulate FOXO function.
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26
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Zheng J, Chen L, Lu T, Zhang Y, Sui X, Li Y, Huang X, He L, Cai J, Zhou C, Liang J, Chen G, Yao J, Yang Y. MSCs ameliorate hepatocellular apoptosis mediated by PINK1-dependent mitophagy in liver ischemia/reperfusion injury through AMPKα activation. Cell Death Dis 2020; 11:256. [PMID: 32312955 PMCID: PMC7171190 DOI: 10.1038/s41419-020-2424-1] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 12/14/2019] [Accepted: 12/17/2019] [Indexed: 12/18/2022]
Abstract
Hepatocyte apoptosis is the main pathophysiological process underlying liver ischemia/reperfusion (I/R) injury. Mitochondrial abnormalities have a vital role in hepatocellular damage. The hepatoprotective effects of mesenchymal stem cells (MSCs) have been previously demonstrated. In this study, we aim to investigate the effect and potential mechanism of MSCs against liver I/R injury. Effects of MSCs were studied in mice liver I/R injury model and in a hypoxia/reoxygenation (H/R) model of L02 hepatocytes. The potential mechanisms of MSCs on these in vivo and in vitro I/R-induced hepatocellular apoptosis models were studies. Accompanied by the improvement of hepatic damage, MSCs exhibited capabilities of controlling mitochondrial quality, shown by reduced mitochondrial reactive oxygen species (mtROS) overproduction, decreased the accumulation of mitochondrial fragmentation, restored ATP generation and upregulated mitophagy. Furthermore, we descripted a potential mechanism of MSCs on upregulating mitophagy and found that the reduced Parkin and PINK1 expression and inactivated AMPKα pathway were observed in the liver tissue in I/R model. These effects were reversed by MSCs treatment. In vitro study showed that MSC-conditioned medium (MSC-CM) suppressed hepatocellular apoptosis and inhibited mtROS accumulation in the H/R environment. And these effects of MSC-CM were partially blocked after the cells were transfected with PINK1 siRNA or added with dorsomorphin. Collectively, our findings provide a novel pharmacological mechanism that MSCs exert hepatoprotective effect in liver I/R injury via upregulating PINK1-dependent mitophagy. In addition, this effect might be attributed to the modulation of AMPKα activation.
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Affiliation(s)
- Jun Zheng
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Liang Chen
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Tongyu Lu
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Yingcai Zhang
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Xin Sui
- Surgical Intensive Care Unit, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Yang Li
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Xuna Huang
- Central Experimental Room of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Liying He
- Department of Gastroenterology, Guangzhou Women and Children's Medical Center, 510630, Guangzhou, China
| | - Jianye Cai
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Chaorong Zhou
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Jinliang Liang
- Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China
| | - Guihua Chen
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China. .,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.
| | - Jia Yao
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China. .,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.
| | - Yang Yang
- Department of Hepatic Surgery and Liver Transplantation Center of the Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China. .,Guangdong Key Laboratory of Liver Disease Research, Key Laboratory of Liver Disease Biotherapy and Translational Medicine of Guangdong Higher Education Institutes, The Third Affiliated Hospital of Sun Yat-sen University, 510630, Guangzhou, China.
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27
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Xia P, Chen J, Liu Y, Fletcher M, Jensen BC, Cheng Z. Doxorubicin induces cardiomyocyte apoptosis and atrophy through cyclin-dependent kinase 2-mediated activation of forkhead box O1. J Biol Chem 2020; 295:4265-4276. [PMID: 32075913 PMCID: PMC7105316 DOI: 10.1074/jbc.ra119.011571] [Citation(s) in RCA: 38] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2019] [Revised: 02/17/2020] [Indexed: 12/29/2022] Open
Abstract
Recent clinical investigations indicate that anthracycline-based chemotherapies induce early decline in heart mass in cancer patients. Heart mass decline may be caused by a decrease in cardiac cell number because of increased cell death or by a reduction in cell size because of atrophy. We previously reported that an anthracycline, doxorubicin (DOX), induces apoptotic death of cardiomyocytes by activating cyclin-dependent kinase 2 (CDK2). However, the signaling pathway downstream of CDK2 remains to be characterized, and it is also unclear whether the same pathway mediates cardiac atrophy. Here we demonstrate that DOX exposure induces CDK2-dependent phosphorylation of the transcription factor forkhead box O1 (FOXO1) at Ser-249, leading to transcription of its proapoptotic target gene, Bcl-2-interacting mediator of cell death (Bim). In cultured cardiomyocytes, treatment with the FOXO1 inhibitor AS1842856 or transfection with FOXO1-specific siRNAs protected against DOX-induced apoptosis and mitochondrial damage. Oral administration of AS1842856 in mice abrogated apoptosis and prevented DOX-induced cardiac dysfunction. Intriguingly, pharmacological FOXO1 inhibition also attenuated DOX-induced cardiac atrophy, likely because of repression of muscle RING finger 1 (MuRF1), a proatrophic FOXO1 target gene. In conclusion, DOX exposure induces CDK2-dependent FOXO1 activation, resulting in cardiomyocyte apoptosis and atrophy. Our results identify FOXO1 as a promising drug target for managing DOX-induced cardiotoxicity. We propose that FOXO1 inhibitors may have potential as cardioprotective therapeutic agents during cancer chemotherapy.
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Affiliation(s)
- Peng Xia
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202-2131
| | - Jingrui Chen
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202-2131
| | - Yuening Liu
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202-2131
| | - Maya Fletcher
- Department of Biology, Gonzaga University, Spokane, Washington 99258
| | - Brian C Jensen
- Division of Cardiology, University of North Carolina School of Medicine, Chapel Hill, North Carolina 27599-7075
| | - Zhaokang Cheng
- Department of Pharmaceutical Sciences, Washington State University, Spokane, Washington 99202-2131.
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28
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Luxán G, Stewen J, Díaz N, Kato K, Maney SK, Aravamudhan A, Berkenfeld F, Nagelmann N, Drexler HC, Zeuschner D, Faber C, Schillers H, Hermann S, Wiseman J, Vaquerizas JM, Pitulescu ME, Adams RH. Endothelial EphB4 maintains vascular integrity and transport function in adult heart. eLife 2019; 8:45863. [PMID: 31782728 PMCID: PMC6884395 DOI: 10.7554/elife.45863] [Citation(s) in RCA: 32] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Accepted: 11/15/2019] [Indexed: 12/17/2022] Open
Abstract
The homeostasis of heart and other organs relies on the appropriate provision of nutrients and functional specialization of the local vasculature. Here, we have used mouse genetics, imaging and cell biology approaches to investigate how homeostasis in the adult heart is controlled by endothelial EphB4 and its ligand ephrin-B2, which are known regulators of vascular morphogenesis and arteriovenous differentiation during development. We show that inducible and endothelial cell-specific inactivation of Ephb4 in adult mice is compatible with survival, but leads to rupturing of cardiac capillaries, cardiomyocyte hypertrophy, and pathological cardiac remodeling. In contrast, EphB4 is not required for integrity and homeostasis of capillaries in skeletal muscle. Our analysis of mutant mice and cultured endothelial cells shows that EphB4 controls the function of caveolae, cell-cell adhesion under mechanical stress and lipid transport. We propose that EphB4 maintains critical functional properties of the adult cardiac vasculature and thereby prevents dilated cardiomyopathy-like defects.
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Affiliation(s)
- Guillermo Luxán
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Jonas Stewen
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Noelia Díaz
- Regulatory Genomics Laboratory, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Katsuhiro Kato
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Sathish K Maney
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Anusha Aravamudhan
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Frank Berkenfeld
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Nina Nagelmann
- Department of Clinical Radiology, University Hospital Münster, Münster, Germany
| | - Hannes Ca Drexler
- Bioanalytical Mass Spectrometry Unit, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Dagmar Zeuschner
- Electron Microscopy Unit, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Cornelius Faber
- Department of Clinical Radiology, University Hospital Münster, Münster, Germany
| | - Hermann Schillers
- Institute for Physiology II, University of Münster, Münster, Germany
| | - Sven Hermann
- European Institute for Molecular Imaging, University of Münster, Münster, Germany
| | - John Wiseman
- Discovery Biology, Discovery Sciences, IMED Biotech Unit, AstraZeneca, Gothenburg, Sweden
| | - Juan M Vaquerizas
- Regulatory Genomics Laboratory, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Mara E Pitulescu
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany
| | - Ralf H Adams
- Department of Tissue Morphogenesis, Max Planck Institute for Molecular Biomedicine, Münster, Germany.,Faculty of Medicine, University of Münster, Münster, Germany
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29
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Zheng L, Mao CZ, Bi YQ, Zhou YM, Zhang Z, Zhao H, Park KS, Huang R, Cai DQ, Qi XF. Differential expression of foxo genes during embryonic development and in adult tissues of Xenopus tropicalis. Gene Expr Patterns 2019; 35:119091. [PMID: 31770608 DOI: 10.1016/j.gep.2019.119091] [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] [Received: 06/22/2019] [Revised: 10/06/2019] [Accepted: 11/22/2019] [Indexed: 01/17/2023]
Abstract
The forkhead-box transcription factors of O subfamily (FOXO) play important roles in regulation of various biological functions. We cloned foxo1, foxo3, foxo4, and foxo6 from Xenopus tropicalis (hereafter X. tropicalis), and examined their expression in embryos and adult tissues. Maternal transcripts of foxo1 and foxo3 genes are detected within the animal half of the early embryo, their zygotic transcripts show distinct patterns. At late tailbud stages, foxo1 expression is observed mainly in eye, brain, branchial arches, and pronephros. In addition to eye, brain, branchial arches and pronephros, foxo3 expression is also evident in heart and somites. Foxo4 expression was not detected in oocytes. At late tailbud stages, foxo4 is mainly expressed in eye, brain, branchial arches and otic vesicle. Foxo6 expression was not detectable until stage 36, with a specific expression in nasal pits. Obvious expression of foxo1, foxo3 and foxo4, but not foxo6, is detected by RT-PCR both in oocytes and in embryos at examined stages. The expression of foxo1, foxo3 and foxo4 is observed in all tested adult tissues including heart, muscle, liver, lung, stomach and small intestine, while foxo6 is only detectable in stomach and small intestine. The differential expression pattern of foxo genes suggests that they exert distinct functions during embryonic development and in various organs of X. tropicalis.
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Affiliation(s)
- Li Zheng
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Cheng-Zhou Mao
- Key Laboratory of Regenerative Medicine, Ministry of Education, Department of Developmental & Regenerative Biology, Jinan University, Guangzhou 510632, China
| | - Yun-Qian Bi
- School of Environmental Science and Engineering, Guangdong University of Technology, Guangzhou 510006, China
| | - Yi-Min Zhou
- Key Laboratory of Regenerative Medicine, Ministry of Education, Department of Developmental & Regenerative Biology, Jinan University, Guangzhou 510632, China
| | - Zhou Zhang
- Key Laboratory of Regenerative Medicine, Ministry of Education, Department of Developmental & Regenerative Biology, Jinan University, Guangzhou 510632, China
| | - Hui Zhao
- School of Biomedical Sciences, Faculty of Medicine, The Chinese University of Hong Kong, Hong Kong, China
| | - Kyu-Sang Park
- Department of Physiology, Wonju College of Medicine, Yonsei University, Wonju, Gangwon 220-701, South Korea
| | - Ruijin Huang
- Institute of Anatomy, Department of Neuroanatomy, Medical Faculty Bonn, Rheinische Friedrich-Wilhelms-University of Bonn, Germany
| | - Dong-Qing Cai
- Key Laboratory of Regenerative Medicine, Ministry of Education, Department of Developmental & Regenerative Biology, Jinan University, Guangzhou 510632, China
| | - Xu-Feng Qi
- Key Laboratory of Regenerative Medicine, Ministry of Education, Department of Developmental & Regenerative Biology, Jinan University, Guangzhou 510632, China.
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30
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Song G, Zhu L, Ruan Z, Wang R, Shen Y. MicroRNA-122 promotes cardiomyocyte hypertrophy via targeting FoxO3. Biochem Biophys Res Commun 2019; 519:682-688. [PMID: 31543343 DOI: 10.1016/j.bbrc.2019.09.035] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/16/2019] [Accepted: 09/09/2019] [Indexed: 12/12/2022]
Abstract
OBJECTIVE -microRNAs (miRNAs) have emerged as novel regulators for cardiac hypertrophy. MiR-122 is well recognized as a promising therapeutic target in liver disease, whereas recently plays important roles in cardiovascular diseases. The current study aimed to explore the effect of miR-122 on the pathogenesis of cardiomyocyte hypertrophy. METHODS AND RESULTS -The cardiomyocytes isolated from the neonatal rat ventricular cardiomyocytes (NRVMs) were collected and performed to Angiotensin II (Ang II) administration. We observed a dramatically increased miR-122 expression in hypertrophic cardiomyocytes. The NRVMs transfected with miR-122 mimic or negative control were utilized for the functional analysis. Overexpression of miR-122 increased the morphology size of cardiomyocytes and promoted the pro-hypertrophic genes expression, whereas downregulated the anti-hypertrophic genes upon Ang II stimulation. The bioinformatics analysis and luciferase reporter assays exhibited that miR-122 directly targeted FoxO3 and attenuated its gene level in hypertrophic cardiomyocytes. Moreover, miR-122 negatively regulated FoxO3 but promoted calcineurin signaling pathway activation. Importantly, FoxO3 overexpression significantly reversed the effect of miR-122 on cardiomyocyte hypertrophy. CONCLUSION -Collected, our finding demonstrated that miR-122 accelerated the development of cardiomyocytes hypertrophy partially via directly regulation of FoxO3-calcineurin pathway.
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Affiliation(s)
- Guixian Song
- Department of Cardiology, Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Jiangsu Province, 225300, China
| | - Li Zhu
- Department of Cardiology, Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Jiangsu Province, 225300, China
| | - Zhongbao Ruan
- Department of Cardiology, Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Jiangsu Province, 225300, China
| | - Ruzhu Wang
- Department of Cardiology, Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Jiangsu Province, 225300, China
| | - Yahui Shen
- Department of Respiratory and Critical Care Medicine, Taizhou People's Hospital, Fifth Affiliated Hospital of Nantong University, Jiangsu Province, 225300, China.
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31
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Li Z, Zhu H, Liu C, Wang Y, Wang D, Liu H, Cao W, Hu Y, Lin Q, Tong C, Lu M, Sachinidis A, Li L, Peng L. GSK-3β inhibition protects the rat heart from the lipopolysaccharide-induced inflammation injury via suppressing FOXO3A activity. J Cell Mol Med 2019; 23:7796-7809. [PMID: 31503410 PMCID: PMC6815822 DOI: 10.1111/jcmm.14656] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2019] [Revised: 08/11/2019] [Accepted: 08/15/2019] [Indexed: 12/25/2022] Open
Abstract
Sepsis‐induced cardiac dysfunction represents a main cause of death in intensive care units. Previous studies have indicated that GSK‐3β is involved in the modulation of sepsis. However, the signalling details of GSK‐3β regulation in endotoxin lipopolysaccharide (LPS)‐induced septic myocardial dysfunction are still unclear. Here, based on the rat septic myocardial injury model, we found that LPS could induce GSK‐3β phosphorylation at its active site (Y216) and up‐regulate FOXO3A level in primary cardiomyocytes. The FOXO3A expression was significantly reduced by GSK‐3β inhibitors and further reversed through β‐catenin knock‐down. This pharmacological inhibition of GSK‐3β attenuated the LPS‐induced cell injury via mediating β‐catenin signalling, which could be abolished by FOXO3A activation. In vivo, GSK‐3β suppression consistently improved cardiac function and relieved heart injury induced by LPS. In addition, the increase in inflammatory cytokines in LPS‐induced model was also blocked by inhibition of GSK‐3β, which curbed both ERK and NF‐κB pathways, and suppressed cardiomyocyte apoptosis via activating the AMP‐activated protein kinase (AMPK). Our results demonstrate that GSK‐3β inhibition attenuates myocardial injury induced by endotoxin that mediates the activation of FOXO3A, which suggests a potential target for the therapy of septic cardiac dysfunction.
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Affiliation(s)
- Zhigang Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Huifang Zhu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chang Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yumei Wang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Duo Wang
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Huan Liu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Wenze Cao
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Yi Hu
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Qin Lin
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Chang Tong
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Min Lu
- Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Agapios Sachinidis
- Institute of Neurophysiology and Center for Molecular Medicine, Cologne (CMMC), University of Cologne, Cologne, Germany
| | - Li Li
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
| | - Luying Peng
- Key Laboratory of Arrhythmias, Ministry of Education, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China.,Research Center for Translational Medicine, Shanghai East Hospital, Tongji University School of Medicine, Shanghai, China
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Lu M, Hartmann D, Braren R, Gupta A, Wang B, Wang Y, Mogler C, Cheng Z, Wirth T, Friess H, Kleeff J, Hüser N, Sunami Y. Oncogenic Akt-FOXO3 loop favors tumor-promoting modes and enhances oxidative damage-associated hepatocellular carcinogenesis. BMC Cancer 2019; 19:887. [PMID: 31488102 PMCID: PMC6728971 DOI: 10.1186/s12885-019-6110-6] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2019] [Accepted: 08/30/2019] [Indexed: 12/26/2022] Open
Abstract
BACKGROUND Hepatocellular carcinoma (HCC) is the most prevalent primary liver cancer, accounting for 80-90% of cases. Mutations are commonly found in the signaling regulating the PI3K/Akt pathway, leading to oncogenic cell proliferation and survival. Key transcription factors that are negatively regulated downstream of PI3K/Akt are members of the forkhead box O family (FOXO). FOXOs were initially considered as tumor suppressors by inducing cell cycle arrest and apoptosis. However, there is increasing evidence showing that FOXOs, especially FOXO3, can support tumorigenesis. METHODS To understand the roles of FOXO3 in liver tumorigenesis and hepatocarcinogenesis, we analyzed HCC patient specimens and also established a doxycycline-regulated transgenic mouse model with hepatocyte-specific FOXO3 expression in a constitutively active form. RESULTS We found that FOXO3 protein is significantly overexpressed and activated in livers of HCC patients. Hepatic activation of FOXO3 induced extensive hepatic damage and elevated gene expression of several HCC-associated factors. Furthermore, FOXO3 expression enhanced hepatotoxicin-induced tumorigenesis. Mechanistically, FOXO3 activation caused oxidative stress and DNA damage and triggered positive feedback-loop for Akt activation as well as mTORC2 activation. Interestingly, FOXO3 activated not only reactive oxygen species (ROS)-promoting pathways, but also ROS-eliminating systems, which can be associated with the activation of the pentose phosphate pathway. CONCLUSIONS FOXO3 is a master regulator of ROS in a 'carrot and stick' manner; on one side avoiding cellular crisis while also supporting hepatocellular carcinogenesis. Clinically, we suggest analyzing FOXO3 activation status in patients with liver diseases, in addition to PI3K/Akt signaling. Personalized therapy of FOXO3 inhibition may be a reasonable, depending on the activation status of FOXO3.
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Affiliation(s)
- Miao Lu
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany.,Department of General Surgery, Zhongda Hospital, Southeast University, Nanjing, China
| | - Daniel Hartmann
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany
| | - Rickmer Braren
- School of Medicine, Klinikum rechts der Isar, Institute for diagnostic and interventional Radiology, Technical University of Munich, Munich, Germany
| | - Aayush Gupta
- School of Medicine, Klinikum rechts der Isar, Institute for diagnostic and interventional Radiology, Technical University of Munich, Munich, Germany
| | - Baocai Wang
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany
| | - Yang Wang
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany
| | - Carolin Mogler
- Institute of Pathology, Technical University of Munich, Munich, Germany
| | - Zhangjun Cheng
- Department of General Surgery, Zhongda Hospital, Southeast University, Nanjing, China
| | - Thomas Wirth
- Institute of Physiological Chemistry, University of Ulm, Ulm, Germany
| | - Helmut Friess
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany
| | - Jörg Kleeff
- Department of Visceral, Vascular and Endocrine Surgery, University Medical Center Halle, Martin-Luther-University Halle-Wittenberg, Halle, Germany
| | - Norbert Hüser
- School of Medicine, Klinikum rechts der Isar, Department of Surgery, Technical University of Munich, Munich, Germany.
| | - Yoshiaki Sunami
- Department of Visceral, Vascular and Endocrine Surgery, University Medical Center Halle, Martin-Luther-University Halle-Wittenberg, Halle, Germany.
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Zhi Y, Xu C, Sui D, Du J, Xu F, Li Y. Effective Delivery of Hypertrophic miRNA Inhibitor by Cholesterol-Containing Nanocarriers for Preventing Pressure Overload Induced Cardiac Hypertrophy. ADVANCED SCIENCE (WEINHEIM, BADEN-WURTTEMBERG, GERMANY) 2019; 6:1900023. [PMID: 31179215 PMCID: PMC6548964 DOI: 10.1002/advs.201900023] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 03/04/2019] [Indexed: 05/15/2023]
Abstract
Persistent cardiac hypertrophy causes heart failure and sudden death. Gene therapy is a promising intervention for this disease, but is limited by the lack of effective delivery systems. Herein, it is reported that CHO-PGEA (cholesterol (CHO)-terminated ethanolamine-aminated poly(glycidyl methacrylate)) can efficiently condense small RNAs into nanosystems for preventing cardiac hypertrophy. CHO-PGEA contains two features: 1) lipophilic cholesterol groups enhance transfection efficiency in cardiomyocytes, 2) abundant hydrophilic hydroxyl groups benefit biocompatibility. miR-182, which is known to downregulate forkhead box O3, is selected as an intervention target and can be blocked by synthetic small RNA inhibitor of miR-182 (miR-182-in). CHO-PGEA can efficiently deliver miR-182-in into hearts. In the mice with aortic coarctation, CHO-PEGA/miR-182-in significantly suppresses cardiac hypertrophy without organ injury. This work demonstrates that CHO-PGEA/miRNA nanosystems are very promising for RNA-based therapeutics to treat heart diseases.
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Affiliation(s)
- Ying Zhi
- Beijing Anzhen HospitalCapital Medical UniversityThe Key Laboratory of Remodeling‐Related Cardiovascular DiseasesMinistry of EducationBeijing Institute of Heart Lung and Blood Vessel DiseasesBeijing100029China
| | - Chen Xu
- Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology)Ministry of EducationBeijing Laboratory of Biomedical MaterialsBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Dandan Sui
- Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology)Ministry of EducationBeijing Laboratory of Biomedical MaterialsBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Jie Du
- Beijing Anzhen HospitalCapital Medical UniversityThe Key Laboratory of Remodeling‐Related Cardiovascular DiseasesMinistry of EducationBeijing Institute of Heart Lung and Blood Vessel DiseasesBeijing100029China
| | - Fu‐Jian Xu
- Key Lab of Biomedical Materials of Natural Macromolecules (Beijing University of Chemical Technology)Ministry of EducationBeijing Laboratory of Biomedical MaterialsBeijing Advanced Innovation Center for Soft Matter Science and EngineeringBeijing University of Chemical TechnologyBeijing100029China
| | - Yulin Li
- Beijing Anzhen HospitalCapital Medical UniversityThe Key Laboratory of Remodeling‐Related Cardiovascular DiseasesMinistry of EducationBeijing Institute of Heart Lung and Blood Vessel DiseasesBeijing100029China
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Zheng Y, Zhang X, Wu X, Jiang L, Ahsan A, Ma S, Xiao Z, Han F, Qin ZH, Hu W, Chen Z. Somatic autophagy of axonal mitochondria in ischemic neurons. J Cell Biol 2019; 218:1891-1907. [PMID: 30979799 PMCID: PMC6548140 DOI: 10.1083/jcb.201804101] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/16/2018] [Revised: 01/01/2019] [Accepted: 03/15/2019] [Indexed: 12/12/2022] Open
Abstract
How mitochondria damaged in distal axons are cleared is not understood. Zheng et al. find that axonal mitochondria return to neuronal soma for mitophagy after ischemic insult. These spatial features of neuronal mitophagy provide insight into how neurons control mitochondrial quality under pathological conditions. Mitophagy protects against ischemic neuronal injury by eliminating damaged mitochondria, but it is unclear how mitochondria in distal axons are cleared. We find that oxygen and glucose deprivation-reperfusion reduces mitochondrial content in both cell bodies and axons. Axonal mitochondria elimination was not abolished in Atg7fl/fl;nes-Cre neurons, suggesting the absence of direct mitophagy in axons. Instead, axonal mitochondria were enwrapped by autophagosomes in soma and axon-derived mitochondria prioritized for elimination by autophagy. Intriguingly, axonal mitochondria showed prompt loss of anterograde motility but increased retrograde movement upon reperfusion. Anchoring of axonal mitochondria by syntaphilin blocked neuronal mitophagy and aggravated injury. Conversely, induced binding of mitochondria to dynein reinforced retrograde transport and enhanced mitophagy to prevent mitochondrial dysfunction and attenuate neuronal injury. Therefore, we reveal somatic autophagy of axonal mitochondria in ischemic neurons and establish a direct link of retrograde mitochondrial movement with mitophagy. Our findings may provide a new concept for reducing ischemic neuronal injury by correcting mitochondrial motility.
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Affiliation(s)
- Yanrong Zheng
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Xiangnan Zhang
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Xiaoli Wu
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Lei Jiang
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Anil Ahsan
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Shijia Ma
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Ziyu Xiao
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Feng Han
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Zheng-Hong Qin
- Department of Pharmacology and Laboratory of Aging and Nervous Diseases, Jiangsu Key Laboratory of Translational Research and Therapy for Neuro-Psycho-Diseases, Soochow University School of Pharmaceutical Sciences, Suzhou, China
| | - Weiwei Hu
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
| | - Zhong Chen
- Institute of Pharmacology and Toxicology, College of Pharmaceutical Sciences, Key Laboratory of Medical Neurobiology of the Ministry of Health of China, Zhejiang University, Hangzhou, China
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Payan SM, Hubert F, Rochais F. Cardiomyocyte proliferation, a target for cardiac regeneration. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2019; 1867:118461. [PMID: 30930108 DOI: 10.1016/j.bbamcr.2019.03.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2018] [Revised: 02/20/2019] [Accepted: 03/13/2019] [Indexed: 12/23/2022]
Abstract
Cardiac diseases, characterized by cardiomyocyte loss, lead to dramatic impairment of cardiac function and ultimately to congestive heart failure. Despite significant advances, conventional treatments do not correct the defects in cardiac muscle cell numbers and the prognosis of congestive heart failure remains poor. The existence, in adult mammalian heart, of low but detectable cardiomyocyte proliferative capacities has shifted the target of regenerative therapy toward new therapeutical strategy. Indeed, the stimulation of terminally differentiated cardiomyocyte proliferation represents the main therapeutic approach for heart regeneration. Increasing evidence demonstrating that the loss of mammalian cardiomyocyte renewal potential shortly after birth causes the loss of regenerative capacities, strongly support the hypothesis that a detailed understanding of the molecular mechanisms controlling fetal and postnatal cardiomyocyte proliferation is essential to identify targets for cardiac regeneration. Here, we will review major developmental mechanisms regulating fetal cardiomyocyte proliferation and will describe the impact of the developmental switch, operating at birth and driving postnatal heart maturation, on the regulation of adult cardiomyocyte proliferation, all these mechanisms representing potential targets for cardiac repair and regeneration.
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Affiliation(s)
- Sandy M Payan
- Aix-Marseille Univ, INSERM, MMG, U 1251, Marseille, France
| | - Fabien Hubert
- Aix-Marseille Univ, INSERM, MMG, U 1251, Marseille, France
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Li X, Liu J, Lu Q, Ren D, Sun X, Rousselle T, Tan Y, Li J. AMPK: a therapeutic target of heart failure-not only metabolism regulation. Biosci Rep 2019; 39:BSR20181767. [PMID: 30514824 PMCID: PMC6328861 DOI: 10.1042/bsr20181767] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/03/2018] [Revised: 11/19/2018] [Accepted: 11/29/2018] [Indexed: 02/07/2023] Open
Abstract
Heart failure (HF) is a serious disease with high mortality. The incidence of this disease has continued to increase over the past decade. All cardiovascular diseases causing dysfunction of various physiological processes can result in HF. AMP-activated protein kinase (AMPK), an energy sensor, has pleiotropic cardioprotective effects and plays a critical role in the progression of HF. In this review, we highlight that AMPK can not only improve the energy supply in the failing heart by promoting ATP production, but can also regulate several important physiological processes to restore heart function. In addition, we discuss some aspects of some potential clinical drugs which have effects on AMPK activation and may have value in treating HF. More studies, especially clinical trials, should be done to evaluate manipulation of AMPK activation as a potential means of treating HF.
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Affiliation(s)
- Xuan Li
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Jia Liu
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
- Department of Geriatrics, The First Hospital of Jilin University, Changchun 130021, China
| | - Qingguo Lu
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
- Department of Endocrinology and Metabolism, West China Hospital of Sichuan University, 37 Guoxue Lane, Chengdu 610041, China
| | - Di Ren
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Xiaodong Sun
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
- Department of Endocrinology, Affiliated Hospital of Weifang Medical University, Weifang, China
| | - Thomas Rousselle
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A
| | - Yi Tan
- Pediatic Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY, U.S.A
- Wendy L. Novak Diabetes Care Center, University of Louisville, Louisville, KY, U.S.A
| | - Ji Li
- Department of Physiology and Biophysics, University of Mississippi Medical Center, Jackson, MS 39216, U.S.A.
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PARP1 promote autophagy in cardiomyocytes via modulating FoxO3a transcription. Cell Death Dis 2018; 9:1047. [PMID: 30323296 PMCID: PMC6189197 DOI: 10.1038/s41419-018-1108-6] [Citation(s) in RCA: 51] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2018] [Revised: 09/21/2018] [Accepted: 09/26/2018] [Indexed: 02/06/2023]
Abstract
Autophagy is a key regulatory process in maintaining cellular homoeostasis via lysosome degradation. Growing evidence reveals that poly(ADP-ribose) polymerase-1 (PARP1) is involved in the progression of many cardiovascular diseases. This study was undertaken to discuss the role of PARP1 in cardiomyocyte autophagy. Our results demonstrated that PARP1 was activated in response to starvation-induced myocardial autophagy. We identified Forkhead box O (FoxO)3a as a substrate of PARP1. Upon PARP1 activation, poly(ADP-ribosyl)ation dissociated histone H1 from FoxO3a target gene promoter and promoted FoxO3a nuclear accumulation and binding activity to the target promoters, resulting in increased expression of autophagy related genes. Activated autophagy by PARP1 impaired mitochondrial metabolism and promoted cardiomyocyte death. And PARP1 silencing or specific inhibitors alleviated the promotion of FoxO3 activity upon starvation or myocardial ischemia, thus suppressing cardiac apoptosis and fibrosis. Together, these data indicate that PARP1-mediated poly(ADP-ribosyl)ation of FoxO3a plays a key role in cardiomyocyte autophagy. The utilization of PARP1 as a therapeutic target for related cardiovascular diseases would be desirable.
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Multiple recycling routes: Canonical vs. non-canonical mitophagy in the heart. Biochim Biophys Acta Mol Basis Dis 2018; 1865:797-809. [PMID: 30290272 DOI: 10.1016/j.bbadis.2018.09.034] [Citation(s) in RCA: 15] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2018] [Revised: 09/13/2018] [Accepted: 09/27/2018] [Indexed: 12/14/2022]
Abstract
The heart is composed of cardiomyocytes that require large amounts of energy to sustain contraction. Mitochondria are distinctive organelles of bacterial origin that generate most of the energy for the heart via oxidative phosphorylation. To ensure a healthy population of mitochondria that efficiently produce ATP, myocytes quickly eliminate any unhealthy or unwanted mitochondria via a process known as mitochondrial autophagy, or mitophagy. It is especially important to selectively remove damaged or aged mitochondria since they can become excessive producers of reactive oxygen species and release pro-death proteins. Because this is such a crucial cellular process, cells have several mechanisms in place to deal with potentially harmful mitochondria. Here, we review the various pathways identified to date and how they are regulated. We also discuss the importance of these canonical and non-canonical pathways in the heart and their link to cardiovascular health, disease and aging.
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Abstract
Macroautophagy/autophagy is vital for intracellular quality control and homeostasis. Therefore, careful regulation of autophagy is very important. In the past 10 years, a number of studies have reported that estrogenic effectors affect autophagy. However, some results, especially those regarding the modulatory effect of 17β-estradiol (E2) on autophagy seem inconsistent. Moreover, several clinical trials are already in place combining both autophagy inducers and autophagy inhibitors with endocrine therapies for breast cancer. Not all patients experience benefit, which further confuses and complicates our understanding of the main effects of autophagy in estrogen-related cancer. In view of the importance of the crosstalk between estrogen signaling and autophagy, this review summarizes the estrogenic effectors reported to affect autophagy, subcellular distribution and translocation of estrogen receptors, autophagy-targeted transcription factors (TFs), miRNAs, and histone modifications regulated by E2. Upon stimulation with estrogen, there will always be opposing functional actions, which might occur between different receptors, receptors on TFs, TFs on autophagy genes, or even histone modifications on transcription. The huge signaling network downstream of estrogen can promote autophagy and reduce overstimulated autophagy at the same time, which allows autophagy to be regulated by estrogen in a restricted range. To help understand how the estrogenic regulation of autophagy affects cell fate, a hypothetical model is presented here. Finally, we discuss some exciting new directions in the field. We hope this might help to better understand the multiple associations between estrogen and autophagy, the pathogenic mechanisms of many estrogen-related diseases, and to design novel and efficacious therapeutics. Abbreviations: AP-1, activator protein-1; HATs, histone acetyltransferases; HDAC, histone deacetylases; HOTAIR, HOX transcript antisense RNA.
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Affiliation(s)
- Jin Xiang
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Xiang Liu
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Jing Ren
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Kun Chen
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Hong-Lu Wang
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Yu-Yang Miao
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
| | - Miao-Miao Qi
- a Key Laboratory of Combinatorial Biosynthesis and Drug Discovery, Ministry of Education, School of Pharmaceutical Sciences , Wuhan University , Wuhan , PR China
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Soares L, Drummond F, Lavorato V, Carneiro-Junior M, Natali A. Exercise training and pulmonary arterial hypertension: A review of the cardiac benefits. Sci Sports 2018. [DOI: 10.1016/j.scispo.2018.02.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
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41
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SGK1 Inhibits Autophagy in Murine Muscle Tissue. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2018; 2018:4043726. [PMID: 29849891 PMCID: PMC5937381 DOI: 10.1155/2018/4043726] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/22/2017] [Revised: 01/20/2018] [Accepted: 02/20/2018] [Indexed: 11/17/2022]
Abstract
Background/Aims As autophagy is linked to several pathological conditions, like cancer and neurodegenerative diseases, it is crucial to understand its regulatory signaling network. In this study, we investigated the role of the serum- and glucocorticoid-induced protein kinase 1 (SGK1) in the control of autophagy. Methods To measure autophagic activity in vivo, we quantified the abundance of the autophagy conjugates LC3-PE (phosphatidylethanolamine) and ATG12-ATG5 in tissue extracts of SGK1 wild-type (Sgk1+/+) and knockout (Sgk1-/-) mice that were either fed or starved for 24 h prior sacrifice. In vitro, we targeted SGK1 by RNAi using GFP-WIPI1 expressing U-2 OS cells to quantify the numbers of cells displaying newly formed autophagosomes. In parallel, these cells were also assessed with regard to LC3 and ULK1 by quantitative Western blotting. Results The abundance of both LC3-PE (LC3-II) and ATG12-ATG5 was significantly increased in red muscle tissues of SGK1 knockout mice. This was found in particular in fed conditions, suggesting that SGK1 may keep basal autophagy under control in red muscle in vivo. Under starved conditions, significant differences were observed in SGK1-deficient white muscle tissue and, under fed conditions, also in the liver. In vitro, we found that SGK1 silencing provoked a significant increase of cells displaying WIPI1-positive autophagosomes and autophagosomal LC3 (LC3-II). Moreover, autophagic flux assessments revealed that autophagic degradation significantly increased in the absence of SGK1, strongly suggesting that SGK1 inhibits both autophagosome formation and autophagic degradation in vitro. In addition, more ULK1 protein lacking the inhibitory, TORC1-specific phosphorylation at serine 758 was detected in the absence of SGK1. Conclusions Combined, our data strongly support the idea that SGK1 inhibits the process of autophagy. Mechanistically, our data suggest that SGK1 should act upstream of ULK1 in regulating autophagy, and we hypothesize that SGK1 contributes to the regulation of ULK1 gene expression.
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42
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FOXO1/3: Potential suppressors of fibrosis. Ageing Res Rev 2018; 41:42-52. [PMID: 29138094 DOI: 10.1016/j.arr.2017.11.002] [Citation(s) in RCA: 81] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2017] [Revised: 10/07/2017] [Accepted: 11/08/2017] [Indexed: 02/06/2023]
Abstract
Fibrosis is a universally age-related disease that involves nearly all organs. It is typically initiated by organic injury and eventually results in organ failure. There are still few effective therapeutic strategy targets for fibrogenesis. Forkhead box proteins O1 and O3 (FOXO1/3) have been shown to have favorable inhibitory effects on fibroblast activation and subsequent extracellular matrix production and can ameliorate fibrosis levels in numerous organs, including the heart, liver, lung, and kidney; they are therefore promising targets for anti-fibrosis therapy. Moreover, we can develop appropriate strategies to make the best use of FOXO1/3's anti-fibrosis properties. The information reviewed here should be significant for understanding the roles of FOXO1/3 in fibrosis and should contribute to the design of further studies related to FOXO1/3 and the fibrotic response and shed light on a potential treatment for fibrosis.
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Stuhlmiller TJ, Zawistowski JS, Chen X, Sciaky N, Angus SP, Hicks ST, Parry TL, Huang W, Beak JY, Willis MS, Johnson GL, Jensen BC. Kinome and Transcriptome Profiling Reveal Broad and Distinct Activities of Erlotinib, Sunitinib, and Sorafenib in the Mouse Heart and Suggest Cardiotoxicity From Combined Signal Transducer and Activator of Transcription and Epidermal Growth Factor Receptor Inhibition. J Am Heart Assoc 2017; 6:JAHA.117.006635. [PMID: 29051215 PMCID: PMC5721866 DOI: 10.1161/jaha.117.006635] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
BACKGROUND Most novel cancer therapeutics target kinases that are essential to tumor survival. Some of these kinase inhibitors are associated with cardiotoxicity, whereas others appear to be cardiosafe. The basis for this distinction is unclear, as are the molecular effects of kinase inhibitors in the heart. METHODS AND RESULTS We administered clinically relevant doses of sorafenib, sunitinib (cardiotoxic multitargeted kinase inhibitors), or erlotinib (a cardiosafe epidermal growth factor receptor inhibitor) to mice daily for 2 weeks. We then compared the effects of these 3 kinase inhibitors on the cardiac transcriptome using RNAseq and the cardiac kinome using multiplexed inhibitor beads coupled with mass spectrometry. We found unexpectedly broad molecular effects of all 3 kinase inhibitors, suggesting that target kinase selectivity does not define either the molecular response or the potential for cardiotoxicity. Using in vivo drug administration and primary cardiomyocyte culture, we also show that the cardiosafety of erlotinib treatment may result from upregulation of the cardioprotective signal transducer and activator of transcription 3 pathway, as co-treatment with erlotinib and a signal transducer and activator of transcription inhibitor decreases cardiac contractile function and cardiomyocyte fatty acid oxidation. CONCLUSIONS Collectively our findings indicate that preclinical kinome and transcriptome profiling may predict the cardiotoxicity of novel kinase inhibitors, and suggest caution for the proposed therapeutic strategy of combined signal transducer and activator of transcription/epidermal growth factor receptor inhibition for cancer treatment.
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Affiliation(s)
- Timothy J Stuhlmiller
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Jon S Zawistowski
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Xin Chen
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Noah Sciaky
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Steven P Angus
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Sean T Hicks
- University of North Carolina McAllister Heart Institute, Chapel Hill, NC
| | - Traci L Parry
- Department of Pathology and Laboratory Medicine, University of North Carolina School of Medicine, Chapel Hill, NC.,University of North Carolina McAllister Heart Institute, Chapel Hill, NC
| | - Wei Huang
- University of North Carolina McAllister Heart Institute, Chapel Hill, NC
| | - Ju Youn Beak
- University of North Carolina McAllister Heart Institute, Chapel Hill, NC
| | - Monte S Willis
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Department of Pathology and Laboratory Medicine, University of North Carolina School of Medicine, Chapel Hill, NC.,University of North Carolina McAllister Heart Institute, Chapel Hill, NC
| | - Gary L Johnson
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC.,Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, NC
| | - Brian C Jensen
- Department of Pharmacology, University of North Carolina School of Medicine, Chapel Hill, NC .,Division of Cardiology, University of North Carolina School of Medicine, Chapel Hill, NC.,University of North Carolina McAllister Heart Institute, Chapel Hill, NC
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44
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Lu J, Zhang R, Hong H, Yang Z, Sun D, Sun S, Guo X, Ye J, Li Z, Liu P. The poly(ADP-ribosyl)ation of FoxO3 mediated by PARP1 participates in isoproterenol-induced cardiac hypertrophy. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2017; 1863:3027-3039. [PMID: 27686254 DOI: 10.1016/j.bbamcr.2016.09.019] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 07/01/2016] [Revised: 09/23/2016] [Accepted: 09/24/2016] [Indexed: 10/20/2022]
Abstract
The Forkhead box-containing protein, O subfamily 3 (FoxO3) transcription factor negatively regulates myocardial hypertrophy, and its transcriptional activity is finely conditioned by diverse posttranslational modifications, such as phosphorylation, acetylation, ubiquitination, methylation and glycosylation. Here, we introduce a novel modification of the FoxO3 protein in cardiomyocytes: poly(ADP-ribosyl)ation (PARylation) mediated by poly(ADP-ribose) polymerase-1 (PARP1). This process catalyzes the NAD+-dependent synthesis of polymers of ADP-ribose (PAR) and their subsequent attachment to target proteins by PARPs. Primary-cultured neonatal rat cardiomyocytes were incubated with isoproterenol (ISO) to induce hypertrophy, or were infected with recombinant adenovirus vectors harboring PARP1 cDNA (Ad-PARP1). Sprague-Dawley (SD) rats were treated with ISO to induce cardiac hypertrophy, or were injected with Ad-PARP1 into the anterior and posterior left ventricular walls. Cardiomyocyte surface area, the mRNA expression of hypertrophic biomarkers, echocardiography, morphometry of the hearts were measured. The PARP1 activity was tested by cellular PAR levels. Interactions of PARP1 and FoxO3 were investigated by co-immunoprecipitation and immunofluorescence technique. PARylation of FoxO3 mediated by PARP1 facilitated its phosphorylation at the T32, S252 and S314 sites, triggered its nucleus export and suppressed its transcriptional activity and target genes expression, ultimately inducing cardiac hypertrophy. Additionally, PARP1 silencing or specific inhibition by 3-Aminobenzamide (3AB) and veliparib (ABT-888) alleviated the inhibition of FoxO3 activity by ISO, thus suppressing ISO-induced cardiac hypertrophy. Our data provide the first evidence that PARP1 exacerbates cardiac hypertrophy by PARylation of FoxO3.
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Affiliation(s)
- Jing Lu
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; Guangdong Provincial Key Laboratory of Construction Foundation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Renwei Zhang
- National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Huiqi Hong
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; Guangdong Provincial Key Laboratory of Construction Foundation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Zuolong Yang
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Duanping Sun
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Shuya Sun
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Xiaolei Guo
- Infinitus (China) Company Ltd., Guangzhou 510623, Guangdong, PR China
| | - Jiantao Ye
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; Guangdong Provincial Key Laboratory of Construction Foundation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China
| | - Zhuoming Li
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; Guangdong Provincial Key Laboratory of Construction Foundation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China.
| | - Peiqing Liu
- Department of Pharmacology and Toxicology, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; National and Local United Engineering Lab of Druggability and New Drugs Evaluation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China; Guangdong Provincial Key Laboratory of Construction Foundation, School of Pharmaceutical Sciences, Sun Yat-Sen University, Guangzhou 510006, Guangdong, PR China.
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45
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Füllgrabe J, Ghislat G, Cho DH, Rubinsztein DC. Transcriptional regulation of mammalian autophagy at a glance. J Cell Sci 2017; 129:3059-66. [PMID: 27528206 DOI: 10.1242/jcs.188920] [Citation(s) in RCA: 145] [Impact Index Per Article: 20.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Macroautophagy, hereafter referred to as autophagy, is a catabolic process that results in the lysosomal degradation of cytoplasmic contents ranging from abnormal proteins to damaged cell organelles. It is activated under diverse conditions, including nutrient deprivation and hypoxia. During autophagy, members of the core autophagy-related (ATG) family of proteins mediate membrane rearrangements, which lead to the engulfment and degradation of cytoplasmic cargo. Recently, the nuclear regulation of autophagy, especially by transcription factors and histone modifiers, has gained increased attention. These factors are not only involved in rapid responses to autophagic stimuli, but also regulate the long-term outcome of autophagy. Now there are more than 20 transcription factors that have been shown to be linked to the autophagic process. However, their interplay and timing appear enigmatic as several have been individually shown to act as major regulators of autophagy. This Cell Science at a Glance article and the accompanying poster highlights the main cellular regulators of transcription involved in mammalian autophagy and their target genes.
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Affiliation(s)
- Jens Füllgrabe
- Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Wellcome/MRC Building, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0XY, UK
| | - Ghita Ghislat
- Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Wellcome/MRC Building, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0XY, UK
| | - Dong-Hyung Cho
- Department of Gerontology, Graduate School of East-West Medical Science, Kyung Hee University, Yongin 17104, South Korea
| | - David C Rubinsztein
- Department of Medical Genetics, Cambridge Institute for Medical Research, University of Cambridge, Wellcome/MRC Building, Addenbrooke's Hospital, Hills Road, Cambridge CB2 0XY, UK
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46
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Potential signaling pathways of acute endurance exercise-induced cardiac autophagy and mitophagy and its possible role in cardioprotection. J Physiol Sci 2017; 67:639-654. [PMID: 28685325 PMCID: PMC5684252 DOI: 10.1007/s12576-017-0555-7] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2017] [Accepted: 06/20/2017] [Indexed: 02/06/2023]
Abstract
Cardiac myocytes are terminally differentiated cells and possess extremely limited regenerative capacity; therefore, preservation of mature cardiac myocytes throughout the individual's entire life span contributes substantially to healthy living. Autophagy, a lysosome-dependent cellular catabolic process, is essential for normal cardiac function and mitochondria maintenance. Therefore, it may be reasonable to hypothesize that if endurance exercise promotes cardiac autophagy and mitochondrial autophagy or mitophagy, exercise-induced cardiac autophagy (EICA) or exercise-induced cardiac mitophagy (EICM) may confer propitious cellular environment and thus protect the heart against detrimental stresses, such as an ischemia-reperfusion (I/R) injury. However, although the body of evidence supporting EICA and EICM is growing, the molecular mechanisms of EICA and EICM and their possible roles in cardioprotection against an I/R injury are poorly understood. Here, we introduce the general mechanisms of autophagy in an attempt to integrate potential molecular pathways of EICA and EICM and also highlight a potential insight into EICA and EICM in cardioprotection against an I/R insult.
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Abstract
Cardiomyopathies represent a heterogeneous group of diseases that negatively affect heart function. Primary cardiomyopathies specifically target the myocardium, and may arise from genetic [hypertrophic cardiomyopathy (HCM), arrhythmogenic right ventricular cardiomyopathy/dysplasia (ARVC/D), mitochondrial cardiomyopathy] or genetic and acquired [dilated cardiomyopathy (DCM), restrictive cardiomyopathy (RCM)] etiology. Modern genomics has identified mutations that are common in these populations, while in vitro and in vivo experimentation with these mutations have provided invaluable insight into the molecular mechanisms native to these diseases. For example, increased myosin heavy chain (MHC) binding and ATP utilization lead to the hypercontractile sarcomere in HCM, while abnormal protein–protein interaction and impaired Ca2+ flux underlie the relaxed sarcomere of DCM. Furthermore, expanded access to genetic testing has facilitated identification of potential risk factors that appear through inheritance and manifest sometimes only in the advanced stages of the disease. In this review, we discuss the genetic and molecular abnormalities unique to and shared between these primary cardiomyopathies and discuss some of the important advances made using more traditional basic science experimentation.
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48
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Severe hearing loss and outer hair cell death in homozygous Foxo3 knockout mice after moderate noise exposure. Sci Rep 2017; 7:1054. [PMID: 28432353 PMCID: PMC5430619 DOI: 10.1038/s41598-017-01142-3] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2017] [Accepted: 03/22/2017] [Indexed: 12/22/2022] Open
Abstract
Noise induced hearing loss (NIHL) is a disease that affects millions of Americans. Identifying genetic pathways that influence recovery from noise exposure is an important step forward in understanding NIHL. The transcription factor Foxo3 integrates the cellular response to oxidative stress and plays a role in extending lifespan in many organisms, including humans. Here we show that Foxo3 is required for auditory function after noise exposure in a mouse model system, measured by ABR. Absent Foxo3, outer hair cells are lost throughout the middle and higher frequencies. SEM reveals persistent damage to some surviving outer hair cell stereocilia. However, DPOAE analysis reveals that some function is preserved in low frequency outer hair cells, despite concomitant profound hearing loss. Inner hair cells, auditory synapses and spiral ganglion neurons are all present after noise exposure in the Foxo3KO/KO fourteen days post noise (DPN). We also report anti-Foxo3 immunofluorescence in adult human outer hair cells. Taken together, these data implicate Foxo3 and its transcriptional targets in outer hair cell survival after noise damage. An additional role for Foxo3 in preserving hearing is likely, as low frequency auditory function is absent in noise exposed Foxo3KO/KOs even though all cells and structures are present.
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Simonson B, Subramanya V, Chan MC, Zhang A, Franchino H, Ottaviano F, Mishra MK, Knight AC, Hunt D, Ghiran I, Khurana TS, Kontaridis MI, Rosenzweig A, Das S. DDiT4L promotes autophagy and inhibits pathological cardiac hypertrophy in response to stress. Sci Signal 2017; 10:10/468/eaaf5967. [PMID: 28246202 DOI: 10.1126/scisignal.aaf5967] [Citation(s) in RCA: 36] [Impact Index Per Article: 5.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
Physiological cardiac hypertrophy, in response to stimuli such as exercise, is considered adaptive and beneficial. In contrast, pathological cardiac hypertrophy that arises in response to pathological stimuli such as unrestrained high blood pressure and oxidative or metabolic stress is maladaptive and may precede heart failure. We found that the transcript encoding DNA damage-inducible transcript 4-like (DDiT4L) was expressed in murine models of pathological cardiac hypertrophy but not in those of physiological cardiac hypertrophy. In cardiomyocytes, DDiT4L localized to early endosomes and promoted stress-induced autophagy through a process involving mechanistic target of rapamycin complex 1 (mTORC1). Exposing cardiomyocytes to various types of pathological stress increased the abundance of DDiT4L, which inhibited mTORC1 but activated mTORC2 signaling. Mice with conditional cardiac-specific overexpression of DDiT4L had mild systolic dysfunction, increased baseline autophagy, reduced mTORC1 activity, and increased mTORC2 activity, all of which were reversed by suppression of transgene expression. Genetic suppression of autophagy also reversed cardiac dysfunction in these mice. Our data showed that DDiT4L may be an important transducer of pathological stress to autophagy through mTOR signaling in the heart and that DDiT4L could be therapeutically targeted in cardiovascular diseases in which autophagy and mTOR signaling play a major role.
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Affiliation(s)
- Bridget Simonson
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Vinita Subramanya
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Mun Chun Chan
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Aifeng Zhang
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Hannabeth Franchino
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Filomena Ottaviano
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Manoj K Mishra
- Department of Physiology, Pennsylvania Muscle Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Ashley C Knight
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Danielle Hunt
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Ionita Ghiran
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Tejvir S Khurana
- Department of Physiology, Pennsylvania Muscle Institute, University of Pennsylvania School of Medicine, Philadelphia, PA 19104, USA
| | - Maria I Kontaridis
- Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
| | - Anthony Rosenzweig
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA
| | - Saumya Das
- Cardiovascular Research Center, Massachusetts General Hospital, Boston, MA 02114, USA. .,Cardiovascular Research Institute, Beth Israel Deaconess Medical Center, Boston, MA 02115, USA
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50
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Lin Y, Sheng M, Weng Y, Xu R, Lu N, Du H, Yu W. Berberine protects against ischemia/reperfusion injury after orthotopic liver transplantation via activating Sirt1/FoxO3α induced autophagy. Biochem Biophys Res Commun 2017; 483:885-891. [DOI: 10.1016/j.bbrc.2017.01.028] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2016] [Accepted: 01/07/2017] [Indexed: 01/07/2023]
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