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Zhu X, Wang X, Zhu B, Ding S, Shi H, Yang X. Disruption of histamine/H 1R-STAT3-SLC7A11 axis exacerbates doxorubicin-induced cardiac ferroptosis. Free Radic Biol Med 2022; 192:98-114. [PMID: 36165929 DOI: 10.1016/j.freeradbiomed.2022.09.012] [Citation(s) in RCA: 10] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/30/2022] [Revised: 09/14/2022] [Accepted: 09/14/2022] [Indexed: 11/25/2022]
Abstract
Doxorubicin (DOX) is widely used in the treatment of various cancers, increasing the great risk of adverse cardiovascular events, while the clinical intervention effect is not ideal. Histamine has been documented to participate in pathophysiological processes of cardiovascular diseases and inflammation-associated carcinogenesis. However, the potential roles of histamine in antitumor-related cardiotoxicity have not been fully elucidated. In this study, cardiomyocytes (hiPSC-CMs, HL-1 cells) and mice were treated with DOX to establish DOX-induced cardiotoxicity (DIC) models. Histidine decarboxylase knockout mice (HDC-/-) mice and histamine 1 receptor (H1R) antagonist were used to explore the effect of histamine/H1R signaling on DIC. Our results demonstrated that histamine deficiency or pharmaceutical inhibition of H1R accelerated myocardial ferroptosis, which is responsible for the aggravated DIC both in vivo and in vitro, while the supplementation of exogenous histamine reversed these changes. Our data revealed that the dysfunction of histamine/H1R signaling repressed the activation of transducer and activator of transcription 3 (STAT3), accompanying with decreased expression of solute carrier family7member11 (SLC7A11), a major modulator of ferroptosis. Conclusively, the disruption of histamine/H1R axis triggered ferroptosis and exacerbated DIC possibly by modulating STAT3-SLC7A11 pathway. Our findings point to a potential therapeutic target for DIC and provide more consideration on the usage of antihistamine drugs.
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Affiliation(s)
- Xiaowei Zhu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Xiangfei Wang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Department of Cardiology, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Baoling Zhu
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China
| | - Suling Ding
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 200032, China
| | - Hongyu Shi
- Department of Cardiology, Wusong Hospital of Zhongshan Hospital, Fudan University, Shanghai, 20094, China
| | - Xiangdong Yang
- Shanghai Institute of Cardiovascular Diseases, Zhongshan Hospital, Fudan University, Shanghai, 200032, China; Institutes of Biomedical Sciences, Fudan University, Shanghai, 200032, China; Department of Cardiology, Wusong Hospital of Zhongshan Hospital, Fudan University, Shanghai, 20094, China; Department of Cardiology, Third People's Hospital of Huizhou, Guangdong, 516003, China.
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2
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Chai GS, Wu JJ, Gong J, Zhou JL, Jiang ZQ, Yi HY, Gu Y, Huang HH, Yao ZY, Zhang YQ, Zhao P, Nie YJ. Activation of β2-adrenergic Receptor Ameliorates Amyloid-β-induced Mitophagy Defects and Tau Pathology in Mice. Neuroscience 2022; 505:34-50. [DOI: 10.1016/j.neuroscience.2022.09.020] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2022] [Revised: 09/26/2022] [Accepted: 09/28/2022] [Indexed: 10/31/2022]
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3
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Sandroni PB, Fisher-Wellman KH, Jensen BC. Adrenergic Receptor Regulation of Mitochondrial Function in Cardiomyocytes. J Cardiovasc Pharmacol 2022; 80:364-377. [PMID: 35170492 PMCID: PMC9365878 DOI: 10.1097/fjc.0000000000001241] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/28/2021] [Accepted: 02/01/2022] [Indexed: 01/31/2023]
Abstract
ABSTRACT Adrenergic receptors (ARs) are G protein-coupled receptors that are stimulated by catecholamines to induce a wide array of physiological effects across tissue types. Both α1- and β-ARs are found on cardiomyocytes and regulate cardiac contractility and hypertrophy through diverse molecular pathways. Acute activation of cardiomyocyte β-ARs increases heart rate and contractility as an adaptive stress response. However, chronic β-AR stimulation contributes to the pathobiology of heart failure. By contrast, mounting evidence suggests that α1-ARs serve protective functions that may mitigate the deleterious effects of chronic β-AR activation. Here, we will review recent studies demonstrating that α1- and β-ARs differentially regulate mitochondrial biogenesis and dynamics, mitochondrial calcium handling, and oxidative phosphorylation in cardiomyocytes. We will identify potential mechanisms of these actions and focus on the implications of these findings for the modulation of contractile function in the uninjured and failing heart. Collectively, we hope to elucidate important physiological processes through which these well-studied and clinically relevant receptors stimulate and fuel cardiac contraction to contribute to myocardial health and disease.
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Affiliation(s)
- Peyton B. Sandroni
- University of North Carolina School of Medicine, Department of Pharmacology
- University of North Carolina School of Medicine, McAllister Heart Institute
| | - Kelsey H. Fisher-Wellman
- East Carolina University Brody School of Medicine, Department of Physiology
- East Carolina University Diabetes and Obesity Institute
| | - Brian C. Jensen
- University of North Carolina School of Medicine, Department of Pharmacology
- University of North Carolina School of Medicine, McAllister Heart Institute
- University of North Carolina School of Medicine, Department of Medicine, Division of Cardiology
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4
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Kitakata H, Endo J, Ikura H, Moriyama H, Shirakawa K, Katsumata Y, Sano M. Therapeutic Targets for DOX-Induced Cardiomyopathy: Role of Apoptosis vs. Ferroptosis. Int J Mol Sci 2022; 23:1414. [PMID: 35163335 PMCID: PMC8835899 DOI: 10.3390/ijms23031414] [Citation(s) in RCA: 58] [Impact Index Per Article: 29.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 01/20/2022] [Accepted: 01/24/2022] [Indexed: 01/04/2023] Open
Abstract
Doxorubicin (DOX) is the most widely used anthracycline anticancer agent; however, its cardiotoxicity limits its clinical efficacy. Numerous studies have elucidated the mechanisms underlying DOX-induced cardiotoxicity, wherein apoptosis has been reported as the most common final step leading to cardiomyocyte death. However, in the past two years, the involvement of ferroptosis, a novel programmed cell death, has been proposed. The purpose of this review is to summarize the historical background that led to each form of cell death, focusing on DOX-induced cardiotoxicity and the molecular mechanisms that trigger each form of cell death. Furthermore, based on this understanding, possible therapeutic strategies to prevent DOX cardiotoxicity are outlined. DNA damage, oxidative stress, intracellular signaling, transcription factors, epigenetic regulators, autophagy, and metabolic inflammation are important factors in the molecular mechanisms of DOX-induced cardiomyocyte apoptosis. Conversely, the accumulation of lipid peroxides, iron ion accumulation, and decreased expression of glutathione and glutathione peroxidase 4 are important in ferroptosis. In both cascades, the mitochondria are an important site of DOX cardiotoxicity. The last part of this review focuses on the significance of the disruption of mitochondrial homeostasis in DOX cardiotoxicity.
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Affiliation(s)
| | | | | | | | | | | | - Motoaki Sano
- Department of Cardiology, Keio University School of Medicine, Tokyo 160-8582, Japan; (H.K.); (J.E.); (H.I.); (H.M.); (K.S.); (Y.K.)
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5
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RARG variant predictive of doxorubicin-induced cardiotoxicity identifies a cardioprotective therapy. Cell Stem Cell 2021; 28:2076-2089.e7. [PMID: 34525346 DOI: 10.1016/j.stem.2021.08.006] [Citation(s) in RCA: 37] [Impact Index Per Article: 12.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/26/2021] [Revised: 08/03/2021] [Accepted: 08/06/2021] [Indexed: 01/20/2023]
Abstract
Doxorubicin is an anthracycline chemotherapy agent effective in treating a wide range of malignancies, but its use is limited by dose-dependent cardiotoxicity. A recent genome-wide association study identified a SNP (rs2229774) in retinoic acid receptor-γ (RARG) as statistically associated with increased risk of anthracycline-induced cardiotoxicity. Here, we show that human induced pluripotent stem cell-derived cardiomyocytes (hiPSC-CMs) from patients with rs2229774 and who suffered doxorubicin-induced cardiotoxicity (DIC) are more sensitive to doxorubicin. We determine that the mechanism of this RARG variant effect is mediated via suppression of topoisomerase 2β (TOP2B) expression and activation of the cardioprotective extracellular regulated kinase (ERK) pathway. We use patient-specific hiPSC-CMs as a drug discovery platform, determining that the RARG agonist CD1530 attenuates DIC, and we confirm this cardioprotective effect in an established in vivo mouse model of DIC. This study provides a rationale for clinical prechemotherapy genetic screening for rs2229774 and a foundation for the clinical use of RARG agonist treatment to protect cancer patients from DIC.
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6
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Lu J, Liu G, Wang Z, Cao J, Chen Y, Dong Y. Restraint stress induces uterine microenvironment disorder in mice during early pregnancy through the β 2-AR/cAMP/PKA pathway. Stress 2021; 24:514-528. [PMID: 33280472 DOI: 10.1080/10253890.2020.1855419] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
During pregnancy, uterus undergoes the environment adaptation as part of a program of development. In the world, one in four people worldwide suffer from mental illness, especially pregnant women. β-Adrenergic receptor (β-AR) is an important regulator that converts environmental stimuli into intracellular signals in mice uterus. CD-1 (ICR) mice undergone restraint stress, which was a case in model to simulate the psychological stress. The plasma and implantation sites in uterus were obtained and examined. PCR analysis demonstrated that β2-AR expression levels in embryo day (E) 3, 5 and 7 were kept at a significantly higher level (p < 0.05) under restraint stress and higher than β1-AR and β3-AR in different gestation ages. The β2-AR protein levels were obviously increased (p < 0.05) due to the markedly elevated norepinephrine (NE) concentration (p < 0.05). In our previous study, restraint stress can induce the apoptosis and inflammation. Also, the matrix metalloprotein-9 (MMP-9) was decreased significantly (p < 0.05) under restraint stress. Meanwhile, Caspase3, p-NF-κB p65 and p-ERK1/2 were obviously increased (p < 0.05) in the work. In vitro studies showed that the p-ERK1/2 and Caspase-3 levels were raised (p < 0.05) after β2-AR was activated. However, they were decreased when PKA was blocked. The protein levels of Caspase-3 were reduced when ERK and NF-κB were blocked (p < 0.05). In conclusion, the β2-AR/cAMP/PKA pathway promoted apoptosis and affected the development of the uterus through the ERK and NF-κB signaling pathway. The findings of this study may provide evidence for female reproduction under psychological stress.
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Affiliation(s)
- Jiayin Lu
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Guanhui Liu
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
- Key Laboratory of Precision Nutrition and Food Quality, Ministry of Education, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Zixu Wang
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Jing Cao
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Yaoxing Chen
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
| | - Yulan Dong
- Laboratory of Neurobiology, College of Veterinary Medicine, China Agricultural University, Beijing, People's Republic of China
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7
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Kondrashov A, Mohd Yusof NAN, Hasan A, Goulding J, Kodagoda T, Hoang DM, Vo NTN, Melarangi T, Dolatshad N, Gorelik J, Hill SJ, Harding SE, Denning C. CRISPR/Cas9-mediated generation and analysis of N terminus polymorphic models of β 2AR in isogenic hPSC-derived cardiomyocytes. MOLECULAR THERAPY-METHODS & CLINICAL DEVELOPMENT 2020; 20:39-53. [PMID: 33335946 PMCID: PMC7733025 DOI: 10.1016/j.omtm.2020.10.019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/04/2020] [Accepted: 10/20/2020] [Indexed: 11/16/2022]
Abstract
During normal- and patho-physiological situations, the behavior of the beta2-adrenoreceptor (β2AR) is influenced by polymorphic variants. The functional impact of such polymorphisms has been suggested from data derived from genetic association studies, in vitro experiments with primary cells, and transgenic overexpression models. However, heterogeneous genetic background and non-physiological transgene expression levels confound interpretation, leading to conflicting mechanistic conclusions. To overcome these limitations, we used CRISPR/Cas9 gene editing technology in human pluripotent stem cells (hPSCs) to create a unique suite of four isogenic homozygous variants at amino acid positions 16(G/R) and 27(G/Q), which reside in the N terminus of the β2AR. By producing cardiomyocytes from these hPSC lines, we determined that at a functional level β2AR signaling dominated over β1AR . Examining changes in beat rates and responses to isoprenaline, Gi coupling, cyclic AMP (cAMP) production, downregulation, and desensitization indicated that responses were often heightened for the GE variant, implying differential dominance of both polymorphic location and amino acid substitution. This finding was corroborated, since GE showed hypersensitivity to doxorubicin-induced cardiotoxicity relative to GQ and RQ variants. Thus, understanding the effect of β2AR polymorphisms on cardiac response to anticancer therapy may provide a route for personalized medicine and facilitate immediate clinical impact.
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Affiliation(s)
- Alexander Kondrashov
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK.,Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, Midlands, UK
| | - Nurul A N Mohd Yusof
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Alveera Hasan
- National Heart and Lung Institute, Imperial College, London W12 0NN, UK
| | - Joëlle Goulding
- Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, Midlands, UK.,Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Nottingham, UK
| | | | - Duc M Hoang
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Nguyen T N Vo
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Tony Melarangi
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
| | - Nazanin Dolatshad
- National Heart and Lung Institute, Imperial College, London W12 0NN, UK
| | - Julia Gorelik
- National Heart and Lung Institute, Imperial College, London W12 0NN, UK
| | - Stephen J Hill
- Centre of Membrane Proteins and Receptors (COMPARE), Universities of Birmingham and Nottingham, Midlands, UK.,Division of Physiology, Pharmacology and Neuroscience, School of Life Sciences, University of Nottingham, Nottingham, UK
| | - Sian E Harding
- National Heart and Lung Institute, Imperial College, London W12 0NN, UK
| | - Chris Denning
- Division of Cancer and Stem Cells, University of Nottingham Biodiscovery Institute, University Park, Nottingham NG7 2RD, UK
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8
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Hu D, Li S, Hu S, Sun Y, Xiao L, Li C, Wang J, Wang Y, Ni L, Zhao C, Wang DW. A Common Missense Variant in OMA1 Associated with the Prognosis of Heart Failure. Cardiovasc Drugs Ther 2020; 34:345-356. [PMID: 32236861 DOI: 10.1007/s10557-020-06960-8] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
PURPOSE Mitochondrial dysfunction plays a vital role in the pathophysiologic process of heart failure (HF). As a quality control system, mitochondrial fusion and fission are under control of mitochondrial fusion and fission-related proteins. The objective of this study was to investigate the effects of common variants in mitochondrial fusion and fission-related genes on the prognosis of HF. METHODS We performed whole exome sequencing (WES) with 1000 HF patients; the statistically significant variant was further genotyped in the replicated population with 2324 HF patients. A series of function analysis including western blot, cell proliferation assay, and in vitro OMA1 activity assay were conducted to illuminate the underlying mechanism. RESULTS We identified a missense variant rs17117699 associated with the prognosis of HF in group without β-blocker use rather than with β-blocker use in two-stage population: adjusted P = 0.79, HR = 0.88 (0.36-2.13) in group with β-blocker use and adjusted P = 0.016, HR = 1.43 (1.07-1.91) in group without β-blocker in first-stage population; adjusted P = 0.42, HR = 0.85 (0.56-1.28) in group with β-blocker use and adjusted P = 0.015, HR = 1.39 (1.06-1.82) in group without β-blocker in replicated stage. Functional analysis indicated that rs17117699-G allele increased the activity of OMA1 assessed by the ratio of S-OPA1 to L-OPA1 and suppressed cells proliferation under ISO treatment when compared with rs17117699-T allele. Furthermore, OMA1 functioned downstream of β-adrenergic receptor signaling and ISO-induced OPA1 cleavage is dependent on OMA1. CONCLUSIONS Our findings demonstrate that rs17117699T>G in OMA1 increases the risk of HF mortality via enhancing its OPA1 cleavage activity. It is a promising potential treatment target for HF. CLINICAL TRIAL REGISTRATION NCT03461107. https://www.clinicaltrials.gov/ct2/show/NCT03461107?term=03461107&cond=Heart+Failure&cntry=CN&rank=1.
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Affiliation(s)
- Dong Hu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Shiyang Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Senlin Hu
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Yang Sun
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Lei Xiao
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Chenze Li
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Jing Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Yan Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Li Ni
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Chunxia Zhao
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China
| | - Dao Wen Wang
- Division of Cardiology, Department of Internal Medicine, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, 1095# Jiefang Ave, Wuhan, 430030, People's Republic of China.
- Hubei Key Laboratory of Genetics and Molecular Mechanisms of Cardiological Disorders, Wuhan, 430030, China.
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9
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Chu SY, Peng F, Wang J, Liu L, Meng L, Zhao J, Han XN, Ding WH. Catestatin in defense of oxidative-stress-induced apoptosis: A novel mechanism by activating the beta2 adrenergic receptor and PKB/Akt pathway in ischemic-reperfused myocardium. Peptides 2020; 123:170200. [PMID: 31730792 DOI: 10.1016/j.peptides.2019.170200] [Citation(s) in RCA: 19] [Impact Index Per Article: 4.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/18/2019] [Revised: 11/09/2019] [Accepted: 11/11/2019] [Indexed: 02/07/2023]
Abstract
Apoptosis induced by oxidative stress is one of the most important cardiomyocytes losses during ischemia-reperfusion (I/R). Catestatin (CST) has been demonstrated to have the anti-oxidative capacity in vitro. We hypothesized that CST intervention could reduce apoptosis of cardiomyocytes induced by oxidative stress in I/R. In Langendorff-perfused rat heart global I/R model, CST was introduced at the reperfusion stage. In comparison to the control group, CST led to preservation on activities of superoxide dismutase and glutathione peroxidase, improvement of hemodynamics, and reduced infarction area in reperfused myocardium. The protection of CST was also shown by less apoptotic cardiomyocytes in TUNEL staining, less caspase-3 activation, and increased phosphorylation of protein kinase B (PKB/Akt) in Western blot. To further demonstrate the benefits of CST and explore the possible underlying mechanism, H2O2-challenged primary-cultured neonatal rat cardiomyocytes were used to simulate the oxidative-stressed scenario. CST incubation with the H2O2-challenged cardiomyocytes led to reduction of apoptosis, which was demonstrated by less Hoechst 33342 positive staining of nuclei, less caspase-3 activation, and DNA fragmentation. The effect of CST was abrogated by pretreatment of the cardiomyocytes with the PI3K inhibitor LY294002. Furthermore, Akt activation and the anti-apoptosis effect of CST were abolished by pretreatment of the cardiomyocytes with β2 receptor inhibitor ICI118551. Thus, the salvage of oxidative-stress-induced apoptotic cardiomyocytes in I/R by CST might involve activation β2 receptor and regulation of PI3K/Akt signaling in reperfusion injury salvage kinase (RISK) pathway.
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Affiliation(s)
- Song-Yun Chu
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Fen Peng
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China; Department of Cardiology, Renmin Hospital of Wuhan University, 430060, Wuhan, China
| | - Jie Wang
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Lin Liu
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Lei Meng
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Jing Zhao
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Xiao-Ning Han
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China
| | - Wen-Hui Ding
- Department of Cardiology, Peking University First Hospital, 100034, Beijing, China.
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10
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Affiliation(s)
- Daniel Bernstein
- From the Division of Pediatric Cardiology, Stanford University, CA.
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11
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Brand CS, Lighthouse JK, Trembley MA. Protective transcriptional mechanisms in cardiomyocytes and cardiac fibroblasts. J Mol Cell Cardiol 2019; 132:1-12. [PMID: 31042488 DOI: 10.1016/j.yjmcc.2019.04.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/12/2019] [Revised: 04/19/2019] [Accepted: 04/22/2019] [Indexed: 12/13/2022]
Abstract
Heart failure is the leading cause of morbidity and mortality worldwide. Several lines of evidence suggest that physical activity and exercise can pre-condition the heart to improve the response to acute cardiac injury such as myocardial infarction or ischemia/reperfusion injury, preventing the progression to heart failure. It is becoming more apparent that cardioprotection is a concerted effort between multiple cell types and converging signaling pathways. However, the molecular mechanisms of cardioprotection are not completely understood. What is clear is that the mechanisms underlying this protection involve acute activation of transcriptional activators and their corresponding gene expression programs. Here, we review the known stress-dependent transcriptional programs that are activated in cardiomyocytes and cardiac fibroblasts to preserve function in the adult heart after injury. Focus is given to prominent transcriptional pathways such as mechanical stress or reactive oxygen species (ROS)-dependent activation of myocardin-related transcription factors (MRTFs) and transforming growth factor beta (TGFβ), and gene expression that positively regulates protective PI3K/Akt signaling. Together, these pathways modulate both beneficial and pathological responses to cardiac injury in a cell-specific manner.
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Affiliation(s)
- Cameron S Brand
- Department of Pharmacology, School of Medicine, University of California - San Diego, 9500 Gilman Drive, Biomedical Sciences Building, La Jolla, CA 92093, USA.
| | - Janet K Lighthouse
- Aab Cardiovascular Research Institute, University of Rochester School of Medicine and Dentistry, 601 Elmwood Avenue, Box CVRI, Rochester, NY 14624, USA.
| | - Michael A Trembley
- Department of Cardiology, Boston Children's Hospital, 300 Longwood Avenue, Boston, MA 02115, USA.
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12
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Hahnova K, Brabcova I, Neckar J, Weissova R, Svatonova A, Novakova O, Zurmanova J, Kalous M, Silhavy J, Pravenec M, Kolar F, Novotny J. β-Adrenergic signaling, monoamine oxidase A and antioxidant defence in the myocardium of SHR and SHR-mtBN conplastic rat strains: the effect of chronic hypoxia. J Physiol Sci 2018; 68:441-454. [PMID: 28567570 PMCID: PMC10717553 DOI: 10.1007/s12576-017-0546-8] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/08/2017] [Accepted: 05/23/2017] [Indexed: 01/24/2023]
Abstract
The β-adrenergic signaling pathways and antioxidant defence mechanisms play important roles in maintaining proper heart function. Here, we examined the effect of chronic normobaric hypoxia (CNH, 10% O2, 3 weeks) on myocardial β-adrenergic signaling and selected components of the antioxidant system in spontaneously hypertensive rats (SHR) and in a conplastic SHR-mtBN strain characterized by the selective replacement of the mitochondrial genome of SHR with that of the more ischemia-resistant Brown Norway strain. Our investigations revealed some intriguing differences between the two strains at the level of β-adrenergic receptors (β-ARs), activity of adenylyl cyclase (AC) and monoamine oxidase A (MAO-A), as well as distinct changes after CNH exposure. The β2-AR/β1-AR ratio was significantly higher in SHR-mtBN than in SHR, apparently due to increased expression of β2-ARs. Adaptation to hypoxia elevated β2-ARs in SHR and decreased the total number of β-ARs in SHR-mtBN. In parallel, the ability of isoprenaline to stimulate AC activity was found to be higher in SHR-mtBN than that in SHR. Interestingly, the activity of MAO-A was notably lower in SHR-mtBN than in SHR, and it was markedly elevated in both strains after exposure to hypoxia. In addition to that, CNH markedly enhanced the expression of catalase and aldehyde dehydrogenase-2 in both strains, and decreased the expression of Cu/Zn superoxide dismutase in SHR. Adaptation to CNH intensified oxidative stress to a similar extent in both strains and elevated the IL-10/TNF-α ratio in SHR-mtBN only. These data indicate that alterations in the mitochondrial genome can result in peculiar changes in myocardial β-adrenergic signaling, MAO-A activity and antioxidant defence and may, thus, affect the adaptive responses to hypoxia.
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Affiliation(s)
- Klara Hahnova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Iveta Brabcova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Neckar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Romana Weissova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Anna Svatonova
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Olga Novakova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jitka Zurmanova
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Martin Kalous
- Department of Cell Biology, Faculty of Science, Charles University, Prague, Czech Republic
| | - Jan Silhavy
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Michal Pravenec
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Frantisek Kolar
- Institute of Physiology, Czech Academy of Sciences, Prague, Czech Republic
| | - Jiri Novotny
- Department of Physiology, Faculty of Science, Charles University, Prague, Czech Republic.
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14
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Diviani D, Osman H, Reggi E. A-Kinase Anchoring Protein-Lbc: A Molecular Scaffold Involved in Cardiac Protection. J Cardiovasc Dev Dis 2018; 5:E12. [PMID: 29419761 PMCID: PMC5872360 DOI: 10.3390/jcdd5010012] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/12/2018] [Revised: 02/02/2018] [Accepted: 02/06/2018] [Indexed: 12/13/2022] Open
Abstract
Heart failure is a lethal disease that can develop after myocardial infarction, hypertension, or anticancer therapy. In the damaged heart, loss of function is mainly due to cardiomyocyte death and associated cardiac remodeling and fibrosis. In this context, A-kinase anchoring proteins (AKAPs) constitute a family of scaffolding proteins that facilitate the spatiotemporal activation of the cyclic adenosine monophosphate (AMP)-dependent protein kinase (PKA) and other transduction enzymes involved in cardiac remodeling. AKAP-Lbc, a cardiac enriched anchoring protein, has been shown to act as a key coordinator of the activity of signaling pathways involved in cardiac protection and remodeling. This review will summarize and discuss recent advances highlighting the role of the AKAP-Lbc signalosome in orchestrating adaptive responses in the stressed heart.
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Affiliation(s)
- Dario Diviani
- Département de Pharmacologie et de Toxicologie, Faculté de Biologie et de Médecine, Lausanne 1005, Switzerland.
| | - Halima Osman
- Département de Pharmacologie et de Toxicologie, Faculté de Biologie et de Médecine, Lausanne 1005, Switzerland.
| | - Erica Reggi
- Département de Pharmacologie et de Toxicologie, Faculté de Biologie et de Médecine, Lausanne 1005, Switzerland.
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15
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Liu J, Sun F, Wang Y, Yang W, Xiao H, Zhang Y, Lu R, Zhu H, Zhuang Y, Pan Z, Wang Z, Du Z, Lu Y. Suppression of microRNA-16 protects against acute myocardial infarction by reversing beta2-adrenergic receptor down-regulation in rats. Oncotarget 2017; 8:20122-20132. [PMID: 28423616 PMCID: PMC5386749 DOI: 10.18632/oncotarget.15391] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2016] [Accepted: 01/11/2017] [Indexed: 12/16/2022] Open
Abstract
microRNA-16 (miR-16) has been shown to be up-regulated in ischemic heart. Beta2-adrenoreceptor (β2-AR) exerts cardioprotective property in ischemic injury. This study aims to determine the effect of miR-16 in cardiac injury in rats and the possible involvement of β2-AR in this process. Acute myocardial infarction (AMI) model in rats was induced by ligation of left coronary artery. Neonatal rat ventricular cells (NRVCs) were cultured in vitro tests. The cardiomyocyte model of oxidative injury was mimicked by hydrogen peroxide. The expression of miR-16 was obviously up-regulated and β2-AR was remarkably down-regulated in both AMI rats and NRVCs under oxidative stress. miR-16 over-expression in NRVCs reduced cell viability and increased apoptosis. Conversely, inhibition of endogenous miR-16 with its specific inhibitor reversed these changes. Over-expression of miR-16 using an miR-16 lentivirus in AMI rats markedly increased cardiac infarct area, lactate dehydrogenase and creatine kinase activity, and exacerbated cardiac dysfunction. Lentivirus-mediated knockdown of miR-16 alleviated acute cardiac injury. Moreover, miR-16 over-expression significantly suppressed β2-AR protein expression in both cultured NRVCs and AMI rats, while inhibition of miR-16 displayed opposite effect on β2-AR protein expression. Luciferase assay confirmed that miR-16 could directly target the 3′untranslated region of β2-AR mRNA. miR-16 is detrimental to the infarct heart and suppression of miR-16 protects rat hearts from ischemic injury via up-regulating of β2-AR by binding to the 3′untranslated region of β2-AR gene. This study indicates that targeting miR-16/β2-AR axis may be a promising strategy for ischemic heart disease.
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Affiliation(s)
- Jiaqi Liu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China.,Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, P.R. China
| | - Fei Sun
- Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, P.R. China
| | - Yuying Wang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Wanqi Yang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Hongwen Xiao
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Yue Zhang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Renzhong Lu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Haixia Zhu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Yuting Zhuang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Zhenwei Pan
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Zhiguo Wang
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China
| | - Zhimin Du
- Institute of Clinical Pharmacology of the Second Affiliated Hospital (Key Laboratory of Drug Research, Heilongjiang Higher Education Institutions), Harbin Medical University, Harbin, P.R. China
| | - Yanjie Lu
- Department of Pharmacology (State-Province Key Laboratories of Biomedicine-Pharmaceutics of China, Key Laboratory of Cardiovascular Research, Ministry of Education), College of Pharmacy, Harbin Medical University, Harbin, P.R. China.,Northern Translational Medicine Research and Cooperation Center, Heilongjiang Academy of Medical Sciences, Harbin Medical University, Harbin, P.R. China
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16
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Stachowiak P, Wojtarowicz A, Milchert-Leszczyńska M, Safranow K, Falco M, Kaliszczak R, Kornacewicz-Jach Z. The paradox of the first cycle of chemotherapy-transient improvement of contractility and diastolic function after the first cycle of anthracycline-based chemotherapy: a prospective clinical trial. Oncotarget 2017; 8:96442-96452. [PMID: 29221219 PMCID: PMC5707113 DOI: 10.18632/oncotarget.21279] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/26/2017] [Accepted: 09/08/2017] [Indexed: 01/20/2023] Open
Abstract
Aims Breast cancer is the most common cancer among women, and anthracyclines are the most commonly administered drugs for these patients. Cardiotoxicity is one of the complications, which limits the success of this therapy. Very few studies have evaluated anthracycline toxicities within the first few hours after the first infusion, and the majority of published studies were performed in animal models. The present study aimed to evaluate changes in echocardiographic parameters in women with breast cancer 24 hours after receiving the first dose of an anthracycline. Materials and Methods and Results The present study included 75 chemotherapy-naive female patients without heart failure, who were diagnosed with breast cancer and were scheduled to undergo anthracycline-based chemotherapy (epirubicin and doxorubicin). During their visits to the Heart Center, the patients underwent detail echocardiographic examination, including assessment of systolic and diastolic function and longitudinal strain. There were no differences in baseline echocardiographic parameters between patients with and those without cardiotoxicity. Cardiotoxicity was observed during follow-up in 14 patients (18.7%). Improvements in left ventricular ejection fraction and global longitudinal strain were observed at 24 hours after administration of the cytotoxic agent in the subgroup of patients without further cardiotoxicity. The changes were transient and the assessment of left ventricular ejection fraction after completion of chemotherapy revealed similar values to those before the treatment. Conclusions The findings of our study suggest that transient improvement in contractility and systolic and diastolic function might occur 24 hours after anthracycline administration, especially in patients who do not develop cardiotoxicity.
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Affiliation(s)
- Paweł Stachowiak
- Department of Cardiology, Pomeranian Medical University, Szczecin, Poland
| | | | - Marta Milchert-Leszczyńska
- Department of Radiotherapy, West Pomeranian Oncology Center, Pomeranian Medical University, Szczecin, Poland
| | - Krzysztof Safranow
- Department of Biochemistry and Medical Chemistry, Pomeranian Medical University, Szczecin, Poland
| | - Michał Falco
- Department of Radiotherapy, West Pomeranian Oncology Center, Pomeranian Medical University, Szczecin, Poland
| | - Robert Kaliszczak
- Department of Cardiology, Pomeranian Medical University, Szczecin, Poland
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17
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Fu Q, Wang Q, Xiang YK. Insulin and β Adrenergic Receptor Signaling: Crosstalk in Heart. Trends Endocrinol Metab 2017; 28:416-427. [PMID: 28256297 PMCID: PMC5535765 DOI: 10.1016/j.tem.2017.02.002] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/03/2017] [Revised: 01/29/2017] [Accepted: 02/01/2017] [Indexed: 02/03/2023]
Abstract
Recent advances show that insulin may affect β adrenergic receptor (βAR) signaling in the heart to modulate cardiac function in clinically relevant states, such as diabetes mellitus (DM) and heart failure (HF). Conversely, activation of βAR regulates cardiac glucose uptake and promotes insulin resistance (IR) in HF. Here, we discuss the recent characterization of the interaction between the cardiac insulin receptor (InsR) and βAR in the myocardium, in which insulin stimulation crosstalks with cardiac βAR via InsR substrate (IRS)-dependent and G-protein receptor kinase 2 (GRK2)-mediated phosphorylation of β2AR. The insulin-induced phosphorylation promotes β2AR coupling to Gi and expression of phosphodiesterase 4D, which both inhibit cardiac adrenergic signaling and compromise cardiac contractile function. These recent developments could support new approaches for the effective prevention or treatment of obesity- or DM-related HF.
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Affiliation(s)
- Qin Fu
- Department of Pharmacology, School of Basic Medicine, Tongji Medical College, Hubei Key Laboratory of Drug Target Research and Pharmacodynamic Evaluation, Huazhong University of Science and Technology, Wuhan, China.
| | - Qingtong Wang
- Institute of Clinical Pharmacology, Key Laboratory of Anti-inflammatory and Immune Medicine, Ministry of Education, Collaborative Innovation Center of Anti-inflammatory and Immune Medicine, Anhui Medical University, Hefei, China.
| | - Yang K Xiang
- Department of Pharmacology, University of California, Davis, CA, USA; VA Northern California Health Care System, Mather, CA, USA.
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Cadeddu C, Mercurio V, Spallarossa P, Nodari S, Triggiani M, Monte I, Piras R, Madonna R, Pagliaro P, Tocchetti CG, Mercuro G. Preventing antiblastic drug-related cardiomyopathy: old and new therapeutic strategies. J Cardiovasc Med (Hagerstown) 2017; 17 Suppl 1 Special issue on Cardiotoxicity from Antiblastic Drugs and Cardioprotection:e64-e75. [PMID: 27755244 DOI: 10.2459/jcm.0000000000000382] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Because of the recent advances in chemotherapeutic protocols, cancer survival has improved significantly, although cardiovascular disease has become a major cause of morbidity and mortality among cancer survivors: in addition to the well-known cardiotoxicity (CTX) from anthracyclines, biologic drugs that target molecules that are active in cancer biology also interfere with cardiovascular homeostasis.Pharmacological and non-pharmacological strategies to protect the cardiovascular structure and function are the best approaches to reducing the prevalence of cardiomyopathy linked to anticancer drugs. Extensive efforts have been devoted to identifying and testing strategies to achieve this end, but little consensus has been reached on a common and shared operability.Timing, dose and mode of chemotherapy administration play a crucial role in the development of acute or late myocardial dysfunction. Primary prevention initiatives cover a wide area that ranges from conventional heart failure drugs, such as β-blockers and renin-angiotensin-aldosterone system antagonists to nutritional supplementation and physical training. Additional studies on the pathophysiology and cellular mechanisms of anticancer-drug-related CTX will enable the introduction of novel therapies.We present various typologies of prevention strategies, describing the approaches that have already been used and those that could be effective on the basis of a better understanding of pharmacokinetic and pharmacodynamic CTX mechanisms.
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Affiliation(s)
- Christian Cadeddu
- aDepartment of Medical Sciences 'Mario Aresu', University of Cagliari, Cagliari bDepartment of Translational Medical Sciences, Division of Internal Medicine, Federico II University, Naples cClinic of Cardiovascular Diseases, IRCCS San Martino IST, Genoa dDepartment of Clinical and Surgical Specialities, Radiological Sciences and Public Health, University of Brescia eDepartment of General Surgery and Medical-Surgery Specialities, University of Catania, Catania fInstitute of Cardiology, Center of Excellence on Aging, 'G. d'Annunzio' University, Chieti gDepartment of Clinical and Biological Sciences, University of Turin, Orbassano, Italy
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Hardonnière K, Fernier M, Gallais I, Mograbi B, Podechard N, Le Ferrec E, Grova N, Appenzeller B, Burel A, Chevanne M, Sergent O, Huc L, Bortoli S, Lagadic-Gossmann D. Role for the ATPase inhibitory factor 1 in the environmental carcinogen-induced Warburg phenotype. Sci Rep 2017; 7:195. [PMID: 28298645 PMCID: PMC5428028 DOI: 10.1038/s41598-017-00269-7] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/12/2016] [Accepted: 02/14/2017] [Indexed: 11/28/2022] Open
Abstract
Most tumors undergo metabolic reprogramming towards glycolysis, the so-called Warburg effect, to support growth and survival. Overexpression of IF1, the physiological inhibitor of the F0F1ATPase, has been related to this phenomenon and appears to be a relevant marker in cancer. Environmental contributions to cancer development are now widely accepted but little is known about the underlying intracellular mechanisms. Among the environmental pollutants humans are commonly exposed to, benzo[a]pyrene (B[a]P), the prototype molecule of polycyclic aromatic hydrocarbons (PAHs), is a well-known human carcinogen. Besides apoptotic signals, B[a]P can also induce survival signals in liver cells, both likely involved in cancer promotion. Our previous works showed that B[a]P elicited a Warburg-like effect, thus favoring cell survival. The present study aimed at further elucidating the molecular mechanisms involved in the B[a]P-induced metabolic reprogramming, by testing the possible involvement of IF1. We presently demonstrate, both in vitro and in vivo, that PAHs, especially B[a]P, strongly increase IF1 expression. Such an increase, which might rely on β2-adrenergic receptor activation, notably participates to the B[a]P-induced glycolytic shift and cell survival in liver cells. By identifying IF1 as a target of PAHs, this study provides new insights about how environmental factors may contribute to related carcinogenesis.
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Affiliation(s)
- Kévin Hardonnière
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Morgane Fernier
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Isabelle Gallais
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Baharia Mograbi
- Institute of Research on Cancer and Ageing of Nice (IRCAN), INSERM U1081, CNRS UMR7284, Université de Nice-Sophia Antipolis, Faculté de Médecine, Centre Antoine Lacassagne, Nice, F-06107, France
| | - Normand Podechard
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Eric Le Ferrec
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Nathalie Grova
- HBRU, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg
| | - Brice Appenzeller
- HBRU, Luxembourg Institute of Health, 29, rue Henri Koch, L-4354, Esch-sur-Alzette, Luxembourg
| | - Agnès Burel
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Martine Chevanne
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | - Odile Sergent
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France
| | | | - Sylvie Bortoli
- INSERM UMR-S 1124, Université Paris Descartes, Centre Universitaire des Saint-Pères, Paris, France
| | - Dominique Lagadic-Gossmann
- Inserm U1085, Institut de Recherche en Santé, Environnement, Travail, Rennes, France.
- Université de Rennes 1, Biosit UMS3080, 35043, Rennes Cédex, France.
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20
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Capuani B, Pacifici F, Pastore D, Palmirotta R, Donadel G, Arriga R, Bellia A, Di Daniele N, Rogliani P, Abete P, Sbraccia P, Guadagni F, Lauro D, Della-Morte D. The role of epsilon PKC in acute and chronic diseases: Possible pharmacological implications of its modulators. Pharmacol Res 2016; 111:659-667. [DOI: 10.1016/j.phrs.2016.07.029] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/22/2016] [Accepted: 07/22/2016] [Indexed: 02/06/2023]
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Abstract
Stress as a modern civilization factor significantly affects our lives. While acute stress might have a positive effect on the organism, chronic stress is usually detrimental and might lead to serious health complications. It is known that stress induced by the physical environment (temperature-induced cold stress) can significantly impair the efficacy of cytotoxic chemotherapies and the anti-tumor immune response. On the other hand, epidemiological evidence has shown that patients taking drugs known as β-adrenergic antagonists ("β-blockers"), which are commonly prescribed to treat arrhythmia, hypertension, and anxiety, have significantly lower rates of several cancers. In this review, we summarize the current knowledge about catecholamines as important stress hormones in tumorigenesis and discuss the use of β-blockers as the potential therapeutic agents.
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Affiliation(s)
- O Krizanova
- a Institute of Clinical and Translational Research, Biomedical Research Center, Slovak Academy of Sciences , Bratislava , Slovakia
- b Department of Physiology, Faculty of Medicine , Masaryk University , Brno , Czech Republic
| | - P Babula
- b Department of Physiology, Faculty of Medicine , Masaryk University , Brno , Czech Republic
| | - K Pacak
- c Development, Endocrinology, and Tumor Genetics Affinity Group, Section on Medical Neuroendocrinology , Eunice Kennedy Shriver National Institute of Child Health and Human Development, National Institutes of Health , Bethesda , MD , USA
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Schranz D, Voelkel NF. "Nihilism" of chronic heart failure therapy in children and why effective therapy is withheld. Eur J Pediatr 2016; 175:445-55. [PMID: 26895877 PMCID: PMC4806719 DOI: 10.1007/s00431-016-2700-3] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/17/2015] [Revised: 12/06/2015] [Accepted: 01/26/2016] [Indexed: 12/11/2022]
Abstract
UNLABELLED Major advances in chronic heart failure (cHF) therapy have been achieved and documented in adult patients, while research regarding the mechanisms and therapy of cHF in children has lagged behind. Based on receptor physiological studies and pharmacological knowledge, treatment with specific ß1-adrenergic receptor blocker (ARB), tissue angiotensin-converting enzyme inhibitor (ACE-I), and mineralocorticoid antagonists have to be recommended in children despite lack of sufficient data derived from prospective randomized studies. At our institution, bisoprolol, lisinopril, and spironolactone have been firmly established to treat systolic cHF, hypoplastic left heart syndrome (HLHS) following hybrid approach and congenital left-right shunt diseases, latest in patients where surgery has to be delayed. Chronic therapy with long-acting diuretics and fluid restriction are not advocated because short-term effects are achieved at the expense of further neuro-humoral stimulation. It remains unclear why diuretics are recommended although evidence-based studies, documenting long-term benefit, are missing. However, that is true for all currently used drugs for pediatric cHF. CONCLUSION This review focuses on the prevailing "nihilism" of cHF therapy in children with the goal to encourage physicians to treat pediatric cHF with a rationally designed therapy, which combines available agents that have been shown to improve survival in adult patients with cHF. Because of the lack of clinical trials, which generate the needed evidence, surrogate variables like heart and respiratory rate, weight gain, image-derived data, and biomarkers should be monitored and used instead. The recommended pharmacological therapy for systolic heart failure is also provided as the basis for utilizing reversible pulmonary arterial banding (PAB) as a novel strategy in young children with dilative cardiomyopathy (DCM) with preserved right ventricular function. WHAT IS KNOWN • Heart failure (HF) in children is a serious public health concern. • HF has numerous etiologies, but unspecific symptoms. • HF interplays among neuro-humoral, and molecular abnormalities. • Pediatric cHF-therapy is currently based on loop-diuretics, fluid restriction and digoxin. What is New: • Cardiac function analysis has to include cardiac synchrony and VVI. • Considering enormous potential of cardiac regeneration, therapy has to extend with selective ß1-ARB, tissue ACE-I and mineralocorticoid blockers, loop-diuretics avoided as ever possible. • Inhibition of the endogenous neuro-humoral stimulation is monitored by surrogate parameters as heart and breath rate and systolic and diastolic blood pressure. • Advocated HF therapy serves for regenerative strategies as reversible Pulmonary Artery Banding in DCM.
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Affiliation(s)
- Dietmar Schranz
- />Pediatric Heart Center, Justus-Liebig University Clinic, Feulgenstr. 12, 30385 Giessen, Germany
| | - Norbert F. Voelkel
- />School of Pharmacy, Virginia Commonwealth University, Richmond, VA USA
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Molinaro M, Ameri P, Marone G, Petretta M, Abete P, Di Lisa F, De Placido S, Bonaduce D, Tocchetti CG. Recent Advances on Pathophysiology, Diagnostic and Therapeutic Insights in Cardiac Dysfunction Induced by Antineoplastic Drugs. BIOMED RESEARCH INTERNATIONAL 2015; 2015:138148. [PMID: 26583088 PMCID: PMC4637019 DOI: 10.1155/2015/138148] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/13/2015] [Accepted: 07/01/2015] [Indexed: 12/28/2022]
Abstract
Along with the improvement of survival after cancer, cardiotoxicity due to antineoplastic treatments has emerged as a clinically relevant problem. Potential cardiovascular toxicities due to anticancer agents include QT prolongation and arrhythmias, myocardial ischemia and infarction, hypertension and/or thromboembolism, left ventricular (LV) dysfunction, and heart failure (HF). The latter is variable in severity, may be reversible or irreversible, and can occur soon after or as a delayed consequence of anticancer treatments. In the last decade recent advances have emerged in clinical and pathophysiological aspects of LV dysfunction induced by the most widely used anticancer drugs. In particular, early, sensitive markers of cardiac dysfunction that can predict this form of cardiomyopathy before ejection fraction (EF) is reduced are becoming increasingly important, along with novel therapeutic and cardioprotective strategies, in the attempt of protecting cardiooncologic patients from the development of congestive heart failure.
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Affiliation(s)
- Marilisa Molinaro
- Department of Medicine and Health Sciences, University of Molise, 86100 Campobasso, Italy
| | - Pietro Ameri
- Department of Internal Medicine, University of Genova, 16132 Genova, Italy
| | - Giancarlo Marone
- Department of Clinical Medicine and Surgery, Federico II University, 80131 Naples, Italy
| | - Mario Petretta
- Department of Translational Medical Sciences, Division of Internal Medicine, Federico II University, 80131 Naples, Italy
| | - Pasquale Abete
- Department of Translational Medical Sciences, Division of Internal Medicine, Federico II University, 80131 Naples, Italy
| | - Fabio Di Lisa
- Department of Biomedical Sciences, University of Padova, 35121 Padova, Italy
- National Researches Council, Neuroscience Institute, University of Padova, 35121 Padova, Italy
| | - Sabino De Placido
- Department of Clinical Medicine and Surgery, Federico II University, 80131 Naples, Italy
| | - Domenico Bonaduce
- Department of Translational Medical Sciences, Division of Internal Medicine, Federico II University, 80131 Naples, Italy
| | - Carlo G. Tocchetti
- Department of Translational Medical Sciences, Division of Internal Medicine, Federico II University, 80131 Naples, Italy
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Yun S, Vincelette ND, Abraham I. Cardioprotective role of β-blockers and angiotensin antagonists in early-onset anthracyclines-induced cardiotoxicity in adult patients: a systematic review and meta-analysis. Postgrad Med J 2015; 91:627-33. [DOI: 10.1136/postgradmedj-2015-133535] [Citation(s) in RCA: 36] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2015] [Accepted: 09/01/2015] [Indexed: 01/13/2023]
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Pecha S, Flenner F, Söhren KD, Lorenz K, Eschenhagen T, Christ T. β 1 Adrenoceptor antagonistic effects of the supposedly selective β 2 adrenoceptor antagonist ICI 118,551 on the positive inotropic effect of adrenaline in murine hearts. Pharmacol Res Perspect 2015; 3:e00168. [PMID: 26516580 PMCID: PMC4618639 DOI: 10.1002/prp2.168] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 06/19/2015] [Accepted: 06/19/2015] [Indexed: 01/14/2023] Open
Abstract
Studies on the relative contribution of β1- and β2-adrenoceptors (AR) generally employ selective β1- and β2-AR antagonists such as CGP 20712A and ICI 118,551, respectively, and assume that antagonism by one of these compounds indicates mediation by the respective AR subtype. Here, we evaluated the β2-AR-selectivity of ICI 118,551 in ventricular muscle strips of transgenic mice lacking β1-AR (β1-KO), β2-AR (β2-KO), or both (β1/β2-KO). Strips were electrically driven and force development was measured. In wild type (WT), ICI 118,551 (100 nmol/L) shifted the concentration–response curve (CRC) for adrenaline by about 0.5 log units to the right, corresponding to the known affinity of ICI 118,551 to β1-AR but not to β2-AR. Conversely, the phosphodiesterase inhibitor rolipram (10 μmol/L) shifted the CRC to the left, but did not enlarge the ICI 118,551 shift, indicating exclusive β1-AR mediation even when PDE4 is inactive. In line with this, rolipram and ICI 118,551 had similar effects in β2-KO than in WT. In contrast, β1-KO did not show any inotropic reaction to adrenaline (+/− rolipram). In WT, the β1-AR selective antagonist CGP 20712A (100 nmol/L) shifted the CRC for isoprenaline by 2.1 log units, corresponding to the affinity of CGP 20712A to β1-AR. Rolipram increased the sensitivity to adrenaline independently of the presence of CGP 20712A. We conclude that effects sensitive to the β2-AR antagonist ICI 118,551 are not necessarily β2-AR-mediated and CGP 20712A-resistant effects cannot be simply interpreted as β2-AR-mediated. Catecholamine effects in murine ventricles strictly depend on β1-AR, even if PDE 4 is blocked.
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Affiliation(s)
- Simon Pecha
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; Department of Cardiovascular Surgery, University Heart Center Hamburg Hamburg, Germany
| | - Frederik Flenner
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; DZHK (German Centre for Cardiovascular Research) Hamburg/Kiel/Lübeck, Germany
| | - Klaus-Dieter Söhren
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; DZHK (German Centre for Cardiovascular Research) Hamburg/Kiel/Lübeck, Germany
| | - Kristina Lorenz
- Department of Pharmacology and Toxicology, University of Wuerzburg Wuerzburg, Germany ; Comprehensive Heart Failure Center, University of Wuerzburg Wuerzburg, Germany
| | - Thomas Eschenhagen
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; DZHK (German Centre for Cardiovascular Research) Hamburg/Kiel/Lübeck, Germany
| | - Torsten Christ
- Department of Experimental Pharmacology and Toxicology, University Medical Center Hamburg-Eppendorf Hamburg, Germany ; DZHK (German Centre for Cardiovascular Research) Hamburg/Kiel/Lübeck, Germany
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Bernstein D, Burridge P. Patient-Specific Pluripotent Stem Cells in Doxorubicin Cardiotoxicity: A New Window Into Personalized Medicine. PROGRESS IN PEDIATRIC CARDIOLOGY 2014; 37:23-27. [PMID: 25530693 DOI: 10.1016/j.ppedcard.2014.10.006] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Daniel Bernstein
- Departments of Pediatrics and Medicine, Stanford Cardiovascular Institute, Stanford University
| | - Paul Burridge
- Departments of Pediatrics and Medicine, Stanford Cardiovascular Institute, Stanford University
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27
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See Hoe LE, Schilling JM, Tarbit E, Kiessling CJ, Busija AR, Niesman IR, Du Toit E, Ashton KJ, Roth DM, Headrick JP, Patel HH, Peart JN. Sarcolemmal cholesterol and caveolin-3 dependence of cardiac function, ischemic tolerance, and opioidergic cardioprotection. Am J Physiol Heart Circ Physiol 2014; 307:H895-903. [PMID: 25063791 DOI: 10.1152/ajpheart.00081.2014] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Cholesterol-rich caveolar microdomains and associated caveolins influence sarcolemmal ion channel and receptor function and protective stress signaling. However, the importance of membrane cholesterol content to cardiovascular function and myocardial responses to ischemia-reperfusion (I/R) and cardioprotective stimuli are unclear. We assessed the effects of graded cholesterol depletion with methyl-β-cyclodextrin (MβCD) and lifelong knockout (KO) or overexpression (OE) of caveolin-3 (Cav-3) on cardiac function, I/R tolerance, and opioid receptor (OR)-mediated protection. Langendorff-perfused hearts from young male C57Bl/6 mice were untreated or treated with 0.02-1.0 mM MβCD for 25 min to deplete membrane cholesterol and disrupt caveolae. Hearts were subjected to 25-min ischemia/45-min reperfusion, and the cardioprotective effects of morphine applied either acutely or chronically [sustained ligand-activated preconditioning (SLP)] were assessed. MβCD concentration dependently reduced normoxic contractile function and postischemic outcomes in association with graded (10-30%) reductions in sarcolemmal cholesterol. Cardioprotection with acute morphine was abolished with ≥20 μM MβCD, whereas SLP was more robust and only inhibited with ≥200 μM MβCD. Deletion of Cav-3 also reduced, whereas Cav-3 OE improved, myocardial I/R tolerance. Protection via SLP remained equally effective in Cav-3 KO mice and was additive with innate protection arising with Cav-3 OE. These data reveal the membrane cholesterol dependence of normoxic myocardial and coronary function, I/R tolerance, and OR-mediated cardioprotection in murine hearts (all declining with cholesterol depletion). In contrast, baseline function appears insensitive to Cav-3, whereas cardiac I/R tolerance parallels Cav-3 expression. Novel SLP appears unique, being less sensitive to cholesterol depletion than acute OR protection and arising independently of Cav-3 expression.
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Affiliation(s)
- Louise E See Hoe
- Heart Foundation Research Centre, Griffith Health Institute, Griffith University, Southport, Queensland, Australia
| | - Jan M Schilling
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Emiri Tarbit
- Heart Foundation Research Centre, Griffith Health Institute, Griffith University, Southport, Queensland, Australia
| | - Can J Kiessling
- Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, Australia; and
| | - Anna R Busija
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Ingrid R Niesman
- Veterans Affairs San Diego Healthcare System, San Diego, California
| | - Eugene Du Toit
- Heart Foundation Research Centre, Griffith Health Institute, Griffith University, Southport, Queensland, Australia
| | - Kevin J Ashton
- Faculty of Health Sciences and Medicine, Bond University, Robina, Queensland, Australia; and
| | - David M Roth
- Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, California
| | - John P Headrick
- Heart Foundation Research Centre, Griffith Health Institute, Griffith University, Southport, Queensland, Australia
| | - Hemal H Patel
- Veterans Affairs San Diego Healthcare System, San Diego, California; Department of Anesthesiology, University of California, San Diego, California
| | - Jason N Peart
- Heart Foundation Research Centre, Griffith Health Institute, Griffith University, Southport, Queensland, Australia;
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Owji A, Varudkar N, Ebert SN. Therapeutic potential of Pnmt+ primer cells for neuro/myocardial regeneration. AMERICAN JOURNAL OF STEM CELLS 2013; 2:137-154. [PMID: 24396707 PMCID: PMC3875277] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Subscribe] [Scholar Register] [Received: 04/02/2013] [Accepted: 10/05/2013] [Indexed: 06/03/2023]
Abstract
Phenylethanolamine n-methyltransferase (Pnmt) catalyzes the conversion of norepinephrine into epinephrine, and thus serves as a marker of adrenergic cells. In adults, adrenergic cells are present in the adrenal medullae and the central and peripheral (sympathetic) nervous systems where they play key roles in stress responses and a variety of other functions. During early embryonic development, however, Pnmt first appears in the heart where it is associated with specialized myocytes in the pacemaking and conduction system. There is a transient surge in cardiac Pnmt expression beginning when the first myocardial contractions occur, before any nerve-like or neural crest cells appear in the heart. This early expression of Pnmt denotes a mesodermal origin of these "Instrinsic Cardiac Adrenergic" (ICA) cells. Interestingly, Pnmt+ cells are found in all four chambers of the developing heart, but by adult stages, are found primarily concentrated on the left side of the heart. This regionalized expression occurs in the left atrium and in specific regions of the left ventricle roughly corresponding to basal, mid, and apical sections. A second distinct population of Pnmt-expressing (Pnmt+) cells enters the embryonic heart from invading neural crest, and these "Neural Crest-Derived" (NCD) Pnmt+ cells appear to give rise to a subpopulation(s) of cardiac neurons. Pnmt expression thus serves as a marker not only for adrenergic cells, but also for precursor or "primer" cells destined to become specialized myocytes and neurons in the heart. This review discusses the distribution of Pnmt in the heart during development, including the types of cells where it is expressed, and their potential use for regenerative medicine therapies for cardiovascular disease.
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Affiliation(s)
- Aaron Owji
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine Orlando, FL 32827, USA
| | - Namita Varudkar
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine Orlando, FL 32827, USA
| | - Steven N Ebert
- Burnett School of Biomedical Sciences, University of Central Florida College of Medicine Orlando, FL 32827, USA
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Abstract
PURPOSE OF REVIEW To review the recent publications on pediatric heart failure and pediatric transplantation. RECENT FINDINGS Little progress has been made in the chronic medical management of pediatric heart failure. Basic science studies demonstrating disparate regulation of β2-adrenergic receptors and microRNA between pediatric and adult heart failure may give clues to the lack of improvement in pediatric outcomes. Pediatric ventricular assist devices have significantly improved survival of bridge-to-transplant, but currently have too many limitations for destination therapy for children. Several areas of pediatric heart transplant have had significant developments over the last few years: the role of antibodies in mediating graft dysfunction after transplantation, ABO-incompatible transplant, extending the pediatric limits on acceptable pulmonary vascular resistance, and risk prediction of pediatric transplant outcomes. Failed single-ventricle palliation is a growing indication for heart transplantation with its own unique challenges. SUMMARY Pediatric heart transplantation can have excellent outcomes with survival beyond 20 years after transplant common, especially in the infant. However, the growing population of children and young adults being referred for heart transplantation after failed congenital heart surgery, especially after failed single-ventricle palliation, is presenting new obstacles that may start reducing the survival rates for pediatric heart transplantation. This may in part be ameliorated by earlier referral for transplant evaluation.
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Fajardo G, Zhao M, Urashima T, Farahani S, Hu DQ, Reddy S, Bernstein D. Deletion of the β2-adrenergic receptor prevents the development of cardiomyopathy in mice. J Mol Cell Cardiol 2013; 63:155-64. [PMID: 23920331 DOI: 10.1016/j.yjmcc.2013.07.016] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/11/2012] [Revised: 07/22/2013] [Accepted: 07/27/2013] [Indexed: 01/03/2023]
Abstract
Beta adrenergic receptor (β-AR) subtypes act through diverse signaling cascades to modulate cardiac function and remodeling. Previous in vitro studies suggest that β1-AR signaling is cardiotoxic whereas β2-AR signaling is cardioprotective, and may be the case during ischemia/reperfusion in vivo. The objective of this study was to assess whether β2-ARs also play a cardioprotective role in the pathogenesis of non-ischemic forms of cardiomyopathy. To dissect the role of β1 vs β2-ARs in modulating MLP (Muscle LIM Protein) cardiomyopathy, we crossbred MLP-/- with β1-/- or β2-/- mice. Deletion of the β2-AR improved survival, cardiac function, exercise capacity and myocyte shortening; by contrast haploinsufficency of the β1-AR reduced survival. Pathologic changes in Ca(2+) handling were reversed in the absence of β2-ARs: peak Ca(2+) and SR Ca(2+) were decreased in MLP-/- and β1+/-/MLP-/- but restored in β2-/-MLP-/-. These changes were associated with reversal of alterations in troponin I and phospholamban phosphorylation. Gi inhibition increased peak and baseline Ca(2+), recapitulating changes observed in the β2-/-/MLP-/-. The L-type Ca(2+) blocker verapamil significantly decreased cardiac function in β2-/-MLP-/- vs WT. We next tested if the protective effects of β2-AR ablation were unique to the MLP model using TAC-induced heart failure. Similar to MLP, β2-/- mice demonstrated delayed progression of heart failure with restoration of myocyte shortening and peak Ca(2+) and Ca(2+) release. Deletion of β2-ARs prevents the development of MLP-/- cardiomyopathy via positive modulation of Ca(2+) due to removal of inhibitory Gi signaling and increased phosphorylation of troponin I and phospholamban. Similar effects were seen after TAC. Unlike previous models where β2-ARs were found to be cardioprotective, in these two models, β2-AR signaling appears to be deleterious, potentially through negative regulation of Ca(2+) dynamics.
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Affiliation(s)
- Giovanni Fajardo
- Department of Pediatrics, Stanford University, Stanford, CA, USA
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32
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Cheville NF. Ultrastructural pathology and interorganelle cross talk in hepatotoxicity. Toxicol Pathol 2013; 41:210-26. [PMID: 23344891 DOI: 10.1177/0192623312467402] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Mitochondria, endoplasmic reticulum (ER), cytoplasmic lipid droplets (CLD), and Golgi vesicles use cross talk to control hepatocyte metabolism, growth, and stress. Interpretation of ultrastructural change requires knowledge of how cross talk pathways function, how differential activation of hepatocellular signals influences organelle structure, and how organelles position themselves to become central hubs for stress responses. Mitochondria, by coupling energy production to pathways for protection, form critical platforms for innate signaling. Mitochondrial outer and inner membranes activate channels and signals to translocate peptides that drive oxidative phosphorylation, β-oxidation of fatty acids, and calcium ion (Ca(2+)) flux. In cell stress, mitochondrial signals initiate fusion and fission, reactive oxygen species (ROS) control, autophagy, apoptosis, and senescence. Specialized tethering proteins tie mitochondria to ER to support translocation of metabolites. For Ca(2+) translocation, ER pores are connected to mitochondrial voltage-dependent anion channels, and for mitochondrial fission, unique membrane proteins pull ER to mitochondria. In toxic injury, cytosolic cytokines translocate to alter metabolism. Toxic effects on ER lipid synthesis lead to Golgi vesicle reduplication and transport of perilipin and other protein cargos into CLDs. How cellular proteostasis, oxidative homeostasis, and ion balance are maintained depend upon the effectiveness of mitochondrial ROS defense responses, unfolded protein responses in mitochondria and ER, and other organelle defenses.
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Affiliation(s)
- Norman F Cheville
- Department of Veterinary Pathology, College of Veterinary Medicine, Iowa State University, Ames, Iowa 50010, USA.
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Inhibition of the Mitochondrial Permeability Transition for Cytoprotection: Direct versus Indirect Mechanisms. Biochem Res Int 2012; 2012:213403. [PMID: 22675634 PMCID: PMC3364550 DOI: 10.1155/2012/213403] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2011] [Accepted: 02/07/2012] [Indexed: 11/17/2022] Open
Abstract
Mitochondria are fascinating organelles, which fulfill multiple cellular functions, as diverse as energy production, fatty acid β oxidation, reactive oxygen species (ROS) production and detoxification, and cell death regulation. The coordination of these functions relies on autonomous mitochondrial processes as well as on sustained cross-talk with other organelles and/or the cytosol. Therefore, this implies a tight regulation of mitochondrial functions to ensure cell homeostasis. In many diseases (e.g., cancer, cardiopathies, nonalcoholic fatty liver diseases, and neurodegenerative diseases), mitochondria can receive harmful signals, dysfunction and then, participate to pathogenesis. They can undergo either a decrease of their bioenergetic function or a process called mitochondrial permeability transition (MPT) that can coordinate cell death execution. Many studies present evidence that protection of mitochondria limits disease progression and severity. Here, we will review recent strategies to preserve mitochondrial functions via direct or indirect mechanisms of MPT inhibition. Thus, several mitochondrial proteins may be considered for cytoprotective-targeted therapies.
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