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Spinelli S, Guida L, Passalacqua M, Magnone M, Cossu V, Sambuceti G, Marini C, Sturla L, Zocchi E. Abscisic Acid and Its Receptors LANCL1 and LANCL2 Control Cardiomyocyte Mitochondrial Function, Expression of Contractile, Cytoskeletal and Ion Channel Proteins and Cell Proliferation via ERRα. Antioxidants (Basel) 2023; 12:1692. [PMID: 37759995 PMCID: PMC10526111 DOI: 10.3390/antiox12091692] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2023] [Revised: 08/24/2023] [Accepted: 08/25/2023] [Indexed: 09/29/2023] Open
Abstract
The cross-kingdom stress hormone abscisic acid (ABA) and its mammalian receptors LANCL1 and LANCL2 regulate the response of cardiomyocytes to hypoxia by activating NO generation. The overexpression of LANCL1/2 increases transcription, phosphorylation and the activity of eNOS and improves cell vitality after hypoxia/reoxygenation via the AMPK/PGC-1α axis. Here, we investigated whether the ABA/LANCL system also affects the mitochondrial oxidative metabolism and structural proteins. Mitochondrial function, cell cycle and the expression of cytoskeletal, contractile and ion channel proteins were studied in H9c2 rat cardiomyoblasts overexpressing or silenced by LANCL1 and LANCL2, with or without ABA. Overexpression of LANCL1/2 significantly increased, while silencing conversely reduced the mitochondrial number, OXPHOS complex I, proton gradient, glucose and palmitate-dependent respiration, transcription of uncoupling proteins, expression of proteins involved in cytoskeletal, contractile and electrical functions. These effects, and LANCL1/2-dependent NO generation, are mediated by transcription factor ERRα, upstream of the AMPK/PGC1-α axis and transcriptionally controlled by the LANCL1/2-ABA system. The ABA-LANCL1/2 hormone-receptor system controls fundamental aspects of cardiomyocyte physiology via an ERRα/AMPK/PGC-1α signaling axis and ABA-mediated targeting of this axis could improve cardiac function and resilience to hypoxic and dysmetabolic conditions.
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Affiliation(s)
- Sonia Spinelli
- Laboratorio di Nefrologia Molecolare, IRCCS Istituto Giannina Gaslini, Via Gerolamo Gaslini 5, 16147 Genova, Italy
| | - Lucrezia Guida
- Section Biochemistry, Department of Experimental Medicine (DIMES), University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy; (L.G.); (M.P.); (M.M.)
| | - Mario Passalacqua
- Section Biochemistry, Department of Experimental Medicine (DIMES), University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy; (L.G.); (M.P.); (M.M.)
| | - Mirko Magnone
- Section Biochemistry, Department of Experimental Medicine (DIMES), University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy; (L.G.); (M.P.); (M.M.)
| | - Vanessa Cossu
- Section Human Anatomy, Department of Experimental Medicine (DIMES), University of Genova, 16126 Genova, Italy;
- U.O. Medicina Nucleare, IRCCS Ospedale Policlinico San Martino, 16131 Genova, Italy; (G.S.); (C.M.)
| | - Gianmario Sambuceti
- U.O. Medicina Nucleare, IRCCS Ospedale Policlinico San Martino, 16131 Genova, Italy; (G.S.); (C.M.)
- Department of Health Sciences, University of Genoa, 16132 Genova, Italy
| | - Cecilia Marini
- U.O. Medicina Nucleare, IRCCS Ospedale Policlinico San Martino, 16131 Genova, Italy; (G.S.); (C.M.)
- Institute of Molecular Bioimaging and Physiology (IBFM), National Research Council (CNR), 20100 Milan, Italy
| | - Laura Sturla
- Section Biochemistry, Department of Experimental Medicine (DIMES), University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy; (L.G.); (M.P.); (M.M.)
| | - Elena Zocchi
- Section Biochemistry, Department of Experimental Medicine (DIMES), University of Genova, Viale Benedetto XV, 1, 16132 Genova, Italy; (L.G.); (M.P.); (M.M.)
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Ulaganathan T, Perales S, Mani S, Baskhairoun BA, Rajasingh J. Pathological implications of cellular stress in cardiovascular diseases. Int J Biochem Cell Biol 2023; 158:106397. [PMID: 36931385 PMCID: PMC10124590 DOI: 10.1016/j.biocel.2023.106397] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2022] [Revised: 03/10/2023] [Accepted: 03/14/2023] [Indexed: 03/17/2023]
Abstract
Cellular stress has been a key factor in the development of cardiovascular diseases. Major types of cellular stress such as mitochondrial stress, endoplasmic reticulum stress, hypoxia, and replicative stress have been implicated in clinical complications of cardiac patients. The heart is the central regulator of the body by supplying oxygenated blood throughout the system. Impairment of cellular function could lead to heart failure, myocardial infarction, ischemia, and even stroke. Understanding the effect of these distinct types of cellular stress on cardiac function is crucial for the scientific community to understand and develop novel therapeutic approaches. This review will comprehensively explain the different mechanisms of cellular stress and the most recent findings related to stress-induced cardiac dysfunction.
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Affiliation(s)
- Thennavan Ulaganathan
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA; Department of Biotechnology, SRM Institute of Science and Technology, kattankulathur, Tamilnadu, 603203, India
| | - Selene Perales
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Saiprahalad Mani
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA; Department of Biotechnology, SRM Institute of Science and Technology, kattankulathur, Tamilnadu, 603203, India
| | - Boula A Baskhairoun
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA
| | - Johnson Rajasingh
- Department of Bioscience Research, University of Tennessee Health Science Center, Memphis, TN, USA; Department of Medicine-Cardiology, University of Tennessee Health Science Center, Memphis, TN, USA; Department of Microbiology, Immunology, and Biochemistry, University of Tennessee Health Science Center, Memphis, TN, USA.
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Rabinovich-Nikitin I, Blant A, Dhingra R, Kirshenbaum LA, Czubryt MP. NF-κB p65 Attenuates Cardiomyocyte PGC-1α Expression in Hypoxia. Cells 2022; 11:cells11142193. [PMID: 35883637 PMCID: PMC9322255 DOI: 10.3390/cells11142193] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Revised: 07/11/2022] [Accepted: 07/11/2022] [Indexed: 01/27/2023] Open
Abstract
Hypoxia exerts broad effects on cardiomyocyte function and viability, ranging from altered metabolism and mitochondrial physiology to apoptotic or necrotic cell death. The transcriptional coactivator peroxisome proliferator-activated receptor gamma coactivator 1-alpha (PGC-1α) is a key regulator of cardiomyocyte metabolism and mitochondrial function and is down-regulated in hypoxia; however, the underlying mechanism is incompletely resolved. Using primary rat cardiomyocytes coupled with electrophoretic mobility shift and luciferase assays, we report that hypoxia impaired mitochondrial energetics and resulted in an increase in nuclear localization of the Nuclear Factor-κB (NF-κB) p65 subunit, and the association of p65 with the PGC-1α proximal promoter. Tumor necrosis factor α (TNFα), an activator of NF-κB signaling, similarly reduced PGC-1α expression and p65 binding to the PGC-1α promoter in a dose-dependent manner, and TNFα-mediated down-regulation of PGC-1α expression could be reversed by the NF-κB inhibitor parthenolide. RNA-seq analysis revealed that cardiomyocytes isolated from p65 knockout mice exhibited alterations in genes associated with chromatin remodeling. Decreased PGC-1α promoter transactivation by p65 could be partially reversed by the histone deacetylase inhibitor trichostatin A. These results implicate NF-κB signaling, and specifically p65, as a potent inhibitor of PGC-1α expression in cardiac myocyte hypoxia.
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Affiliation(s)
- Inna Rabinovich-Nikitin
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada; (I.R.-N.); (R.D.)
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Alexandra Blant
- Department of Biochemistry and Medical Genetics, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada;
| | - Rimpy Dhingra
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada; (I.R.-N.); (R.D.)
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
| | - Lorrie A. Kirshenbaum
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada; (I.R.-N.); (R.D.)
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Correspondence: (L.A.K.); (M.P.C.); Tel.: +1-204-235-3661 (L.A.K.); +1-204-235-3719 (M.P.C.)
| | - Michael P. Czubryt
- Institute of Cardiovascular Sciences, St. Boniface Hospital Albrechtsen Research Centre, Winnipeg, MB R2H 2A6, Canada; (I.R.-N.); (R.D.)
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB R3E 0J9, Canada
- Correspondence: (L.A.K.); (M.P.C.); Tel.: +1-204-235-3661 (L.A.K.); +1-204-235-3719 (M.P.C.)
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Zhang Y, Xu S, Qian Y, He X, Mo C, Yang X, Xiao Q. Sodium butyrate attenuates rotenone-induced toxicity by activation of autophagy through epigenetically regulating PGC-1α expression in PC12 cells. Brain Res 2021; 1776:147749. [PMID: 34896331 DOI: 10.1016/j.brainres.2021.147749] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Revised: 11/06/2021] [Accepted: 12/06/2021] [Indexed: 02/06/2023]
Abstract
Short-chain fatty acids (SCFAs) are considered the key molecular link between gut microbiota and pathogenesis of Parkinson's disease (PD). However, the role of SCFAs in PD pathogenesis is controversial. Autophagy is important for the degradation of α-synuclein, which is critical to the development of PD. However, whether SCFAs can regulate autophagy in PD remains unknown. We aimed to investigate the role of SCFAs and explore the potential mechanisms in rat dopaminergic PC12 cells treated with rotenone. Expression levels of α-synuclein, peroxisome proliferator-activated receptor γ coactivator-1α (PGC-1α) and microtubule-associated protein 1 light chain 3 beta (LC3B)-II were detected by Western blot. Histone acetylation levels at PGC-1α promoter region were measured using chromatin immunoprecipitation-quantitative polymerase chain reaction (ChIP-qPCR). Among the three SCFAs, sodium butyrate (NaB) protected against rotenone-induced toxicity. NaB activated autophagy pathway and reduced rotenone-induced α-synuclein expression through the activation of autophagy. Notably, NaB activated autophagy pathway through upregulating PGC-1α expression. More importantly, NaB promoted the levels of histone 3 lysine 9 acetylation (H3K9Ac) and histone 3 lysine 27 acetylation (H3K27Ac) at PGC-1α promoter region, indicating that NaB promotes PGC-1α expression via histone acetylation modification. In conclusion, NaB can protect against rotenone-induced toxicity through activation of the autophagy pathway by upregulating PGC-1α expression via epigenetic modification.
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Affiliation(s)
- Yi Zhang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Shaoqing Xu
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Yiwei Qian
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Xiaoqin He
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Chengjun Mo
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Xiaodong Yang
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
| | - Qin Xiao
- Department of Neurology and Institute of Neurology, Ruijin Hospital, Shanghai Jiao Tong University School of Medicine, No. 197 Ruijin Er Road, Shanghai 200025, China.
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Liu Y, Luo Q, Su Z, Xing J, Wu J, Xiang L, Huang Y, Pan H, Wu X, Zhang X, Li J, Yan F, Zhang H. Suppression of Myocardial Hypoxia-Inducible Factor-1α Compromises Metabolic Adaptation and Impairs Cardiac Function in Patients With Cyanotic Congenital Heart Disease During Puberty. Circulation 2021; 143:2254-2272. [PMID: 33663226 DOI: 10.1161/circulationaha.120.051937] [Citation(s) in RCA: 25] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
BACKGROUND Cyanotic congenital heart disease (CCHD) is a complex pathophysiological condition involving systemic chronic hypoxia (CH). Some patients with CCHD are unoperated for various reasons and remain chronically hypoxic throughout their lives, which heightens the risk of heart failure as they age. Hypoxia activates cellular metabolic adaptation to balance energy demands by accumulating hypoxia-inducible factor 1-α (HIF-1α). This study aims to determine the effect of CH on cardiac metabolism and function in patients with CCHD and its association with age. The role of HIF-1α in this process was investigated, and potential therapeutic targets were explored. METHODS Patients with CCHD (n=25) were evaluated for cardiac metabolism and function with positron emission tomography/computed tomography and magnetic resonance imaging. Heart tissue samples were subjected to metabolomic and protein analyses. CH rodent models were generated to enable continuous observation of changes in cardiac metabolism and function. The role of HIF-1α in cardiac metabolic adaptation to CH was investigated with genetically modified animals and isotope-labeled metabolomic pathway tracing studies. RESULTS Prepubertal patients with CCHD had glucose-dominant cardiac metabolism and normal cardiac function. In comparison, among patients who had entered puberty, the levels of myocardial glucose uptake and glycolytic intermediates were significantly decreased, but fatty acids were significantly increased, along with decreased left ventricular ejection fraction. These clinical phenotypes were replicated in CH rodent models. In patients with CCHD and animals exposed to CH, myocardial HIF-1α was upregulated before puberty but was significantly downregulated during puberty. In cardiomyocyte-specific Hif-1α-knockout mice, CH failed to initiate the switch of myocardial substrates from fatty acids to glucose, thereby inhibiting ATP production and impairing cardiac function. Increased insulin resistance during puberty suppressed myocardial HIF-1α and was responsible for cardiac metabolic maladaptation in animals exposed to CH. Pioglitazone significantly reduced myocardial insulin resistance, restored glucose metabolism, and improved cardiac function in pubertal CH animals. CONCLUSIONS In patients with CCHD, maladaptation of cardiac metabolism occurred during puberty, along with impaired cardiac function. HIF-1α was identified as the key regulator of cardiac metabolic adaptation in animals exposed to CH, and pubertal insulin resistance could suppress its expression. Pioglitazone administration during puberty might help improve cardiac function in patients with CCHD.
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Affiliation(s)
- Yiwei Liu
- Heart Center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., J.X., L.X., H.Z.).,Shanghai Clinical Research Center for Rare Pediatric Diseases, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., H.Z.)
| | - Qipeng Luo
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.).,Department of Anesthesia, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., X.W., F.Y.).,Pain Medicine Center, Peking University Third Hospital, Beijing, China (Q.L.)
| | - Zhanhao Su
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.)
| | - Junyue Xing
- Heart Center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., J.X., L.X., H.Z.)
| | - Jinlin Wu
- Department of Cardiac Surgery, Guangdong Cardiovascular Institute, Guangdong Provincial People's Hospital, Guangdong Academy of Medical Sciences, Guangzhou, China (J.W.)
| | - Li Xiang
- Heart Center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., J.X., L.X., H.Z.)
| | - Yuan Huang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.)
| | - Haizhou Pan
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.).,Children's Heart Center, the Second Affiliated Hospital and Yuying Children's Hospital, Institute of Cardiovascular Development and Translational Medicine, Wenzhou Medical University, Zhejiang, China (H.P.)
| | - Xie Wu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.).,Department of Anesthesia, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., X.W., F.Y.)
| | - Xiaoling Zhang
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.)
| | - Jun Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.)
| | - Fuxia Yan
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., Z.S., Y.H., H.P., X.W., X.Z., J.L., F.Y.).,Department of Anesthesia, Fuwai Hospital, National Center for Cardiovascular Diseases, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China (Q.L., X.W., F.Y.)
| | - Hao Zhang
- Heart Center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., J.X., L.X., H.Z.).,Shanghai Clinical Research Center for Rare Pediatric Diseases, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China (Y.L., H.Z.)
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Su Z, Liu Y, Zhang H. Adaptive Cardiac Metabolism Under Chronic Hypoxia: Mechanism and Clinical Implications. Front Cell Dev Biol 2021; 9:625524. [PMID: 33604337 PMCID: PMC7884626 DOI: 10.3389/fcell.2021.625524] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2020] [Accepted: 01/11/2021] [Indexed: 11/29/2022] Open
Abstract
Chronic hypoxia is an essential component in many cardiac diseases. The heart consumes a substantial amount of energy and it is important to maintain the balance of energy supply and demand when oxygen is limited. Previous studies showed that the heart switches from fatty acid to glucose to maintain metabolic efficiency in the adaptation to chronic hypoxia. However, the underlying mechanism of this adaptive cardiac metabolism remains to be fully characterized. Moreover, how the altered cardiac metabolism affects the heart function in patients with chronic hypoxia has not been discussed in the current literature. In this review, we summarized new findings from animal and human studies to illustrate the mechanism underlying the adaptive cardiac metabolism under chronic hypoxia. Clinical focus is given to certain patients that are subject to the impact of chronic hypoxia, and potential treatment strategies that modulate cardiac metabolism and may improve the heart function in these patients are also summarized.
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Affiliation(s)
- Zhanhao Su
- State Key Laboratory of Cardiovascular Disease, National Center for Cardiovascular Diseases, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Yiwei Liu
- Heart center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
| | - Hao Zhang
- Heart center and Shanghai Institute of Pediatric Congenital Heart Disease, Shanghai Children's Medical Center, National Children's Medical Center, Shanghai Jiaotong University School of Medicine, Shanghai, China
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Bai J, Ma Q, Lan Y, Chen Y, Ma S, Li J, Liu C, Fu Z, Lu X, Huang Y, Li Y. Mitochondrial tRNA Mutation and Regulation of the Adiponectin Pathway in Maternally Inherited Hypertension in Chinese Han. Front Cell Dev Biol 2021; 8:623450. [PMID: 33553162 PMCID: PMC7862570 DOI: 10.3389/fcell.2020.623450] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/30/2020] [Accepted: 12/01/2020] [Indexed: 01/11/2023] Open
Abstract
Some essential hypertension (EH) patients show maternal inheritance, which is the mode of mitochondrial DNA inheritance. This study examines the mechanisms by which mitochondrial mutations cause EH characterized by maternal inheritance. The study enrolled 115 volunteers, who were divided into maternally inherited EH (group A, n = 17), non-maternally inherited EH (group B, n = 65), and normal control (group C, n = 33) groups. A mitochondrial tRNA (15910 C>T) gene mutation was significantly correlated with EH and may play an important role in the pathogenesis of maternally inherited EH. Examining two families carrying the mitochondrial tRNA 15910 C>T mutation, which disrupted base pairing and may affect the stability and function of mitochondrial tRNAThr, we find that the overall incidence of EH was 59.3% in the maternal family members and 90% in males, significantly higher than in the general population in China (23.2%), and that the EH began at a younger age in those carrying mitochondrial tRNA 15910 C>T. To reveal the mechanism through which mitochondrial tRNA 15910 C>T causes maternally inherited EH, we cultured human peripheral blood mononuclear cells from family A2 in vitro. We find that cells carrying mitochondrial tRNA 15910 C>T were more viable and proliferative, and the increased ATP production resulted in raised intracellular reactive oxygen species (ROS). Moreover, the mitochondrial dysfunction resulted in reduced APN levels, causing hypoadiponectinemia, which promoted cell proliferation, and produced more ROS. This vicious cycle promoted the occurrence of EH with maternally inherited mitochondrial tRNA 15910 C>T. The mitochondrial tRNA 15910 C>T mutation may induce hypertension by changing the APN, AdipoR1, PGC-1α, and ERRα signaling pathways to elevate blood pressure. We discover a new mitochondrial mutation (tRNA 15910 C>T) related to EH, reveal part of the mechanism by which mitochondrial mutations lead to the occurrence and development of maternally inherited EH, and discuss the role of APN in it.
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Affiliation(s)
- Jing Bai
- Medical School of Chinese People's Liberation Army (PLA), Beijing, China.,Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Qiang Ma
- Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Yunfeng Lan
- Hainan LANBO Health Management Co. Ltd., Sanya, China
| | - Yating Chen
- Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Shanshan Ma
- Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Jiaxin Li
- Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Chuanbin Liu
- Medical School of Chinese People's Liberation Army (PLA), Beijing, China.,Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Zihao Fu
- Medical School of Chinese People's Liberation Army (PLA), Beijing, China.,Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Xu Lu
- Medical School of Chinese People's Liberation Army (PLA), Beijing, China.,Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
| | - Yun Huang
- Department of Gerontology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan, China
| | - Yang Li
- Department of Cardiology, The Sixth Medical Center, Chinese People's Liberation Army (PLA) General Hospital, Beijing, China
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Abstract
The prevalence of cardiovascular mortality is higher in men than in age-matched premenopausal women. Gender differences are linked to circulating sex-related steroid hormone levels and their cardio-specific actions, which are critical factors involved in the prevalence and features of age-associated cardiovascular disease. In women, estrogens have been described as cardioprotective agents, while in men, testosterone is the main sex steroid hormone. The effects of testosterone as a metabolic regulator and cardioprotective agent in aging men are poorly understood. With advancing age, testosterone levels gradually decrease in men, an effect associated with increasing fat mass, decrease in lean body mass, dyslipidemia, insulin resistance and adjustment in energy substrate metabolism. Aging is associated with a decline in metabolism, characterized by modifications in cardiac function, excitation-contraction coupling, and lower efficacy to generate energy. Testosterone deficiency -as found in elderly men- rapidly becomes an epidemic condition, associated with prominent cardiometabolic disorders. Therefore, it is highly probable that senior men showing low testosterone levels will display symptoms of androgen deficiency, presenting an unfavorable metabolic profile and increased cardiovascular risk. Moreover, recent reports establish that testosterone replacement improves cardiomyocyte bioenergetics, increases glucose metabolism and reduces insulin resistance in elderly men. Thus, testosterone-related metabolic signaling and gene expression may constitute relevant therapeutic target for preventing, or treating, age- and gender-related cardiometabolic diseases in men. Here, we will discuss the impact of current evidence showing how cardiac metabolism is regulated by androgen levels in aging men.
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Affiliation(s)
- Genaro Barrientos
- Programa de Fisiología y Biofísica, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
- Centro de Estudios en Ejercicio, Metabolismo y Cáncer (CEMC), Universidad de Chile, Santiago, Chile
| | - Paola Llanos
- Centro de Estudios en Ejercicio, Metabolismo y Cáncer (CEMC), Universidad de Chile, Santiago, Chile
- Facultad de Odontología, Instituto de Investigación en Ciencias Odontológicas (ICOD), Universidad de Chile, Santiago, Chile
| | - Carla Basualto-Alarcón
- Departamento de Ciencias de la Salud, Universidad de Aysén, Coyhaique, Chile
- Departamento de Anatomía y Medicina Legal, Facultad de Medicina, Universidad de Chile, Santiago, Chile
| | - Manuel Estrada
- Programa de Fisiología y Biofísica, Facultad de Medicina, Instituto de Ciencias Biomédicas, Universidad de Chile, Santiago, Chile
- *Correspondence: Manuel Estrada
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Cai G, Liu J, Wang M, Su L, Cai M, Huang K, Li X, Li M, Wang L, Huang X. Mutual promotion of FGF21 and PPARγ attenuates hypoxia-induced pulmonary hypertension. Exp Biol Med (Maywood) 2019; 244:252-261. [PMID: 30714402 DOI: 10.1177/1535370219828692] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023] Open
Abstract
IMPACT STATEMENT In this study, we reported for the first time that FGF21 alleviated hypoxia-induced pulmonary hypertension through attenuation of increased pulmonary arterial pressure, pulmonary arterial remodeling and collagen deposition in vivo, and we confirmed the mutual promotion of FGF21 and PPARγ in hypoxia-induced pulmonary hypertension. Additionally, we found that FGF21 and PPARγ mutually promote each other's expression via the AMPK/PGC-1α pathway and KLB protein in vitro and in vivo. Pulmonary hypertension is a progressive and serious pathological phenomenon with a poor prognosis, and current therapies are highly limited. Our results provide novel insight into potential clinical therapies for pulmonary hypertension and establish the possibility of using this drug combination and potential dosage reductions in clinical settings.
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Affiliation(s)
- Gexiang Cai
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Jingjing Liu
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Meibin Wang
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Lihuang Su
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Mengsi Cai
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Kate Huang
- 2 Department of Pathology, The First Affiliated Hospital of Wenzhou Medical University, Zhejiang 325000, PR China
| | - Xiuchun Li
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Manxiang Li
- 3 Department of Respiratory Medicine, The First Affiliated Hospital of Xi'an Jiaotong University, Shanxi 710061, PR China
| | - Liangxing Wang
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
| | - Xiaoying Huang
- 1 Division of Pulmonary Medicine, The First Affiliated Hospital of Wenzhou Medical University, Key Laboratory of Heart and Lung, Zhejiang 325000, PR China
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Niu X, Zhang J, Ni J, Wang R, Zhang W, Sun S, Peng Y, Bai M, Zhang Z. Network pharmacology-based identification of major component of Angelica sinensis and its action mechanism for the treatment of acute myocardial infarction. Biosci Rep 2018; 38:BSR20180519. [PMID: 30232231 DOI: 10.1042/BSR20180519] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/03/2018] [Revised: 09/10/2018] [Accepted: 09/12/2018] [Indexed: 01/06/2023] Open
Abstract
Background: To decipher the mechanisms of Angelica sinensis for the treatment of acute myocardial infarction (AMI) using network pharmacology analysis. Methods: Databases were searched for the information on constituents, targets, and diseases. Cytoscape software was used to construct the constituent–target–disease network and screen the major targets, which were annotated with the DAVID (Database for Annotation, Visualization and Integrated Discovery) tool. The cardioprotective effects of Angelica sinensis polysaccharide (ASP), a major component of A. sinensis, were validated both in H9c2 cells subjected to simulated ischemia by oxygen and glucose deprivation and in rats with AMI by ligation of the left anterior coronary artery. Results: We identified 228 major targets against AMI injury for A. sinensis, which regulated multiple pathways and hit multiple targets involved in several biological processes. ASP significantly decreased endoplasmic reticulum (ER) stress-induced cell death both in vitro and in vivo. In ischemia injury rats, ASP treatment reduced infarct size and preserved heart function. ASP enhanced activating transcription factor 6 (ATF6) activity, which improved ER-protein folding capacity. ASP activated the expression of p-AMP-activated protein kinase (p-AMPK) and peroxisome proliferator-activated receptor γ coactivator 1α (PGC1α). Additionally, ASP attenuated levels of proinflammatory cytokines and maintained a balance in the oxidant/antioxidant levels after AMI. Conclusion:In silico analysis revealed the associations between A. sinensis and AMI through multiple targets and several key signaling pathways. Experimental data indicate that ASP protects the heart against ischemic injury by activating ATF6 to ameliorate the detrimental ER stress. ASP’s effects could be mediated via the activation of AMPK-PGC1α pathway.
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Li F, Guo S, Wang C, Huang X, Wang H, Tan X, Cai Q, Wu J, Zhang Y, Chen X, Lin W, Zhang B. Yiqihuoxue decoction protects against post-myocardial infarction injury via activation of cardiomyocytes PGC-1α expression. BMC Complement Altern Med 2018; 18:253. [PMID: 30223807 PMCID: PMC6142634 DOI: 10.1186/s12906-018-2319-1] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 05/01/2018] [Accepted: 09/02/2018] [Indexed: 12/22/2022]
Abstract
BACKGROUND Mitochondrial dysfunction has been implicated in the pathogenesis of ischemic heart disease, exacerbating cardiomyocytes injury in myocardial infarction (MI). Peroxisome proliferator-activated receptor gamma co-activator (PGC-1α) has been recognized as the key regulator of mitochondrial biogenesis and energy metabolism. Yiqihuoxue decoction (YQHX), a Traditional Chinese Medicine (TCM) prescription, can prevent and treat ischemic heart disease. However, the mechanisms of YQHX on PGC-1α expression in the ischemic heart have remained unclear. METHODS Myocardial ischemia rat model and ischemia/hypoxia injury model in the cardiomyocytes were used to minic human cardiovascular disease. Rats were randomly assigned into 4 groups: Sham, Model, YQHX (8.2 g/kg) and Trimetazidine (10 mg/kg) group. 28 days after MI, cardiac functions and morphology were detected by echocardiography and HE staining, respectively. In vitro, the effects of YQHX on H9c2 cell viability, LDH and ROS were detected, respectively. PGC-1α relevant proteins were evaluated by Western blotting. RESULTS In vivo, echocardiography and HE staining results showed that YQHX improved cardiac functions and modified pathological changes. YQHX enhanced PGC-1α expression and improved the mitochondrial ultrastructure and functions in rats MI model for 4 weeks. Further, we explored its potential mechanisms in cardiomyocytes. In vitro, YQHX significantly enhanced cell viability and reduced LDH release and ROS production induced by hypoxia in cardiomyocytes. Interestingly, exposure of cardiomyocytes to hypoxic conditions for 12 h induced the downregulation of PGC-1α expression, but the expression levels nearly returned to the normal state after hypoxia for 24 h. YQHX significantly enhanced PGC-1α expression between 12 h and 24 h induced by hypoxia through a mechanism associated with the activation of AMPK phosphorylation in H9c2 cells. In addition, YQHX upregulated the expression of Tfam and NRF-1, while NRF-1 expression was completely blocked by an AMPK inhibitor. YQHX largely restored the mitochondrial morphology and increased mitochondrial membrane potential in hypoxia-induced injury. Furthermore, the UHPLC-LTQ-Orbitrap-MSn analysis found that there were 87 chemical constituents in YQHX. CONCLUSIONS These results suggest that the protective effect of YQHX on cardiomyocytes against hypoxia-induced injury may be attributed to activation of PGC-1α and maintenance of mitochondrial functions through a mechanism involving the activation of AMPK phosphorylation.
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Affiliation(s)
- Fanghe Li
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Shuwen Guo
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Chunguo Wang
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Xiaolou Huang
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Hui Wang
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Xiaobo Tan
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Qian Cai
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Jiani Wu
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Yuqin Zhang
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Xi Chen
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Wangou Lin
- Beijing University of Chinese Medicine, Beijing, 100029 China
| | - Binyue Zhang
- Beijing University of Chinese Medicine, Beijing, 100029 China
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Choi YK, Kim JH, Lee DK, Lee KS, Won MH, Jeoung D, Lee H, Ha KS, Kwon YG, Kim YM. Carbon Monoxide Potentiation of L-Type Ca 2+ Channel Activity Increases HIF-1α-Independent VEGF Expression via an AMPKα/SIRT1-Mediated PGC-1α/ERRα Axis. Antioxid Redox Signal 2017; 27:21-36. [PMID: 27554679 DOI: 10.1089/ars.2016.6684] [Citation(s) in RCA: 42] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
AIMS The heme oxygenase-1 (HO-1)/carbon monoxide (CO) pathway induced in astrocytes after ischemic brain injury promotes vascular endothelial growth factor (VEGF) expression to maintain and repair neurovascular function. Although HO-1-derived CO has been shown to induce hypoxia-inducible factor-1α (HIF-1α)-dependent VEGF expression, the underlying mechanism independent of HIF-1α remains to be elucidated. RESULTS HO-1 and VEGF were coexpressed in astrocytes of ischemic mouse brain tissues. Experiments with specific siRNAs and pharmacological activators/inhibitors of various target genes demonstrated that astrocytes pre-exposed to the CO-releasing compound, CORM-2, or transfected with HO-1 increased HIF-1α-independent VEGF expression via sequential activation of the following signal cascades; Ca2+/calmodulin-dependent protein kinase kinase β-mediated AMP-activated protein kinase (AMPK)α activation, AMPKα-induced increases in nicotinamide phosphoribosyltransferase (NAMPT) expression and cellular NAD+ level, sirtuin 1 (SIRT1)-dependent peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) stabilization and activation, and PGC-1α/estrogen-related receptor (ERR)α-mediated VEGF expression. All of these sequential events were blocked by an L-type voltage-gated Ca2+ channel inhibitor and Ca2+ chelators, but not by other Ca2+ channel inhibitors. INNOVATION HO-1-derived CO elicits Ca2+ influx by activating L-type Ca2+ channels, which is a key player in HIF-1α-independent VEGF expression by activating the AMPKα-NAMPT-SIRT1-PGC-1α/ERRα pathway. CONCLUSION Our results provide new mechanistic insight into the possible role for L-type Ca2+ channels in HO-1/CO-induced angiogenesis. Antioxid. Redox Signal. 27, 21-36.
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Affiliation(s)
- Yoon Kyung Choi
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
- 2 Department of Bioscience and Biotechnology, Konkuk University , Seoul, Republic of Korea
| | - Ji-Hee Kim
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
| | - Dong-Keun Lee
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
| | - Kwang-Soon Lee
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
| | - Moo-Ho Won
- 3 Department of Neurobiology, School of Medicine, Kangwon National University , Chuncheon, Republic of Korea
| | - Dooil Jeoung
- 4 Department of Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
| | - Hansoo Lee
- 5 Department of Life Sciences, College of Natural Sciences, Kangwon National University , Chuncheon, Republic of Korea
| | - Kwon-Soo Ha
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
| | - Young-Guen Kwon
- 6 Department of Biochemistry, College of Life Science and Biotechnology, Yonsei University , Seoul, Republic of Korea
| | - Young-Myeong Kim
- 1 Department of Molecular and Cellular Biochemistry, Kangwon National University , Chuncheon, Republic of Korea
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Major JL, Dewan A, Salih M, Leddy JJ, Tuana BS. E2F6 Impairs Glycolysis and Activates BDH1 Expression Prior to Dilated Cardiomyopathy. PLoS One 2017; 12:e0170066. [PMID: 28085920 PMCID: PMC5234782 DOI: 10.1371/journal.pone.0170066] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 12/28/2016] [Indexed: 01/07/2023] Open
Abstract
Rationale The E2F pathway plays a critical role in cardiac growth and development, yet its role in cardiac metabolism remains to be defined. Metabolic changes play important roles in human heart failure and studies imply the ketogenic enzyme β-hydroxybutyrate dehydrogenase I (BDH1) is a potential biomarker. Objective To define the role of the E2F pathway in cardiac metabolism and dilated cardiomyopathy (DCM) with a focus on BDH1. Methods and Results We previously developed transgenic (Tg) mice expressing the transcriptional repressor, E2F6, to interfere with the E2F/Rb pathway in post-natal myocardium. These Tg mice present with an E2F6 dose dependent DCM and deregulated connexin-43 (CX-43) levels in myocardium. Using the Seahorse platform, a 22% decrease in glycolysis was noted in neonatal cardiomyocytes isolated from E2F6-Tg hearts. This was associated with a 39% reduction in the glucose transporter GLUT4 and 50% less activation of the regulator of glucose metabolism AKT2. The specific reduction of cyclin B1 (70%) in Tg myocardium implicates its importance in supporting glycolysis in the postnatal heart. No changes in cyclin D expression (known to regulate mitochondrial activity) were noted and lipid metabolism remained unchanged in neonatal cardiomyocytes from Tg hearts. However, E2F6 induced a 40-fold increase of the Bdh1 transcript and 890% increase in its protein levels in hearts from Tg pups implying a potential impact on ketolysis. By contrast, BDH1 expression is not activated until adulthood in normal myocardium. Neonatal cardiomyocytes from Wt hearts incubated with the ketone β-hydroxybutyrate (β-OHB) showed a 100% increase in CX-43 protein levels, implying a role for ketone signaling in gap junction biology. Neonatal cardiomyocyte cultures from Tg hearts exhibited enhanced levels of BDH1 and CX-43 and were not responsive to β-OHB. Conclusions The data reveal a novel role for the E2F pathway in regulating glycolysis in the developing myocardium through a mechanism involving cyclin B1. We reveal BDH1 expression as an early biomarker of heart failure and its potential impact, through ketone signaling, on CX-43 levels in E2F6-induced DCM.
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Affiliation(s)
| | - Aaraf Dewan
- University of Ottawa, Dept. CMM, Ottawa, Ontario, Canada
| | - Maysoon Salih
- University of Ottawa, Dept. CMM, Ottawa, Ontario, Canada
| | - John J. Leddy
- University of Ottawa, Dept. CMM, Ottawa, Ontario, Canada
| | - Balwant S. Tuana
- University of Ottawa, Dept. CMM, Ottawa, Ontario, Canada
- University of Ottawa Heart Institute, Ottawa, Ontario, Canada
- * E-mail:
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15
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Marín-Hernández Á, Gallardo-Pérez JC, Hernández-Reséndiz I, Del Mazo-Monsalvo I, Robledo-Cadena DX, Moreno-Sánchez R, Rodríguez-Enríquez S. Hypoglycemia Enhances Epithelial-Mesenchymal Transition and Invasiveness, and Restrains the Warburg Phenotype, in Hypoxic HeLa Cell Cultures and Microspheroids. J Cell Physiol 2016; 232:1346-1359. [PMID: 27661776 DOI: 10.1002/jcp.25617] [Citation(s) in RCA: 28] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2016] [Accepted: 09/22/2016] [Indexed: 12/11/2022]
Abstract
The accelerated growth of solid tumors leads to episodes of both hypoxia and hypoglycemia (HH) affecting their intermediary metabolism, signal transduction, and transcriptional activity. A previous study showed that normoxia (20% O2 ) plus 24 h hypoglycemia (2.5 mM glucose) increased glycolytic flux whereas oxidative phosphorylation (OxPhos) was unchanged versus normoglycemia in HeLa cells. However, the simultaneous effect of HH on energy metabolism has not been yet examined. Therefore, the effect of hypoxia (0.1-1% O2 ) plus hypoglycemia on the energy metabolism of HeLa cells was analyzed by evaluating protein content and activity, along with fluxes of both glycolysis and OxPhos. Under hypoxia, in which cell growth ceased and OxPhos enzyme activities, ΔΨm and flux were depressed, hypoglycemia did not stimulate glycolytic flux despite increasing H-RAS, p-AMPK, GLUT1, GLUT3, and HKI levels, and further decreasing mitochondrial enzyme content. The impaired mitochondrial function in HH cells correlated with mitophagy activation. The depressed OxPhos and unchanged glycolysis pattern was also observed in quiescent cells from mature multicellular tumor spheroids, suggesting that these inner cell layers are similarly subjected to HH. The principal ATP supplier was glycolysis for HH 2D monolayer and 3D quiescent spheroid cells. Accordingly, the glycolytic inhibitors iodoacetate and gossypol were more effective than mitochondrial inhibitors in decreasing HH-cancer cell viability. Under HH, stem cell-, angiogenic-, and EMT-biomarkers, as well as glycoprotein-P content and invasiveness, were also enhanced. These observations indicate that HH cancer cells develop an attenuated Warburg and pronounced EMT- and invasive-phenotype. J. Cell. Physiol. 232: 1346-1359, 2017. © 2016 Wiley Periodicals, Inc.
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Ye JX, Wang SS, Ge M, Wang DJ. Suppression of endothelial PGC-1α is associated with hypoxia-induced endothelial dysfunction and provides a new therapeutic target in pulmonary arterial hypertension. Am J Physiol Lung Cell Mol Physiol 2016; 310:L1233-42. [PMID: 27084848 DOI: 10.1152/ajplung.00356.2015] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2015] [Accepted: 04/13/2016] [Indexed: 01/22/2023] Open
Abstract
Endothelial dysfunction plays a principal role in the pathogenesis of pulmonary arterial hypertension (PAH), which is a fatal disease with limited effective clinical treatments. Mitochondrial dysregulation and oxidative stress are involved in endothelial dysfunction. Peroxisome proliferator-activated receptor-γ coactivator-1α (PGC-1α) is a key regulator of cellular energy metabolism and a master regulator of mitochondrial biogenesis. However, the roles of PGC-1α in hypoxia-induced endothelial dysfunction are not completely understood. We hypothesized that hypoxia reduces PGC-1α expression and leads to endothelial dysfunction in hypoxia-induced PAH. We confirmed that hypoxia has a negative impact on endothelial PGC-1α in experimental PAH in vitro and in vivo. Hypoxia-induced PGC-1α inhibited the oxidative metabolism and mitochondrial function, whereas sustained PGC-1α decreased reactive oxygen species (ROS) formation, mitochondrial swelling, and NF-κB activation and increased ATP formation and endothelial nitric oxide synthase (eNOS) phosphorylation. Furthermore, hypoxia-induced changes in the mean pulmonary arterial pressure and right heart hypertrophy were nearly normal after intervention. These results suggest that PGC-1α is associated with endothelial function in hypoxia-induced PAH and that improved endothelial function is associated with improved cellular mitochondrial respiration, reduced inflammation and oxygen stress, and increased PGC-1α expression. Taken together, these findings indicate that PGC-1α may be a new therapeutic target in PAH.
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Affiliation(s)
- Jia-Xin Ye
- Department of Cardio-Thoracic Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China; and
| | - Shan-Shan Wang
- Center for Reproductive Medicine, Department of Obstetrics and Gynecology, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China
| | - Min Ge
- Department of Cardio-Thoracic Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China; and
| | - Dong-Jin Wang
- Department of Cardio-Thoracic Surgery, the Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, China; and
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Gui L, Liu B, Lv G. Hypoxia induces autophagy in cardiomyocytes via a hypoxia-inducible factor 1-dependent mechanism. Exp Ther Med 2016; 11:2233-2239. [PMID: 27284306 PMCID: PMC4887955 DOI: 10.3892/etm.2016.3190] [Citation(s) in RCA: 42] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2014] [Accepted: 08/26/2015] [Indexed: 12/18/2022] Open
Abstract
Hypoxia frequently accompanies such vascular disorders as atherosclerosis, thrombosis and ischemia/reperfusion injury. Myocardial ischemia/reperfusion, in particular, is a major contributor to cardiomyocyte impairment. Autophagy is a dynamic, self-catabolic process that has been implicated in a wide range of physiological processes and the pathogenesis of diverse diseases. The aim of the present study was to investigate the promotion of autophagy by hypoxia in a rat H9c2 heart cell line and determine the regulatory role of hypoxia-inducible factor 1 (HIF-1) in the hypoxia-induced autophagy in H9c2 cells, using quantitative green fluorescent protein-microtubule-associated protein 1 light chain 3 analysis and electron microscopy of autophagic vesicles. In addition, western blot and quantitative polymerase chain reaction analysis of autophagy-associated markers was conducted. In addition, the role of HIF-1-mediated autophagy in the hypoxia-induced impairment of H9c2 cells was examined, as a measure of cellular viability, using an MTT assay. The results demonstrated that autophagy was induced in H9c2 cells under hypoxia, and the autophagy induction triggered by hypoxia could be enhanced by HIF-1α overexpression and inhibited by HIF-1α knockdown. Furthermore, the HIF-1-mediated autophagy ameliorated the reduction in the H9c2 cell viability induced by hypoxia. These findings provide a novel insight into the hypoxic-ischemic injury to cardiomyocytes and give evidence for the occurrence of HIF-1-mediated autophagy in myocardial ischemia.
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Affiliation(s)
- Lan Gui
- Department of Basic Theory, Sports Institute of Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028041, P.R. China; Institute of Mongolian Genome and Genetic Diseases, Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028041, P.R. China
| | - Batu Liu
- Sports Department, Sports Institute of Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028041, P.R. China
| | - Guang Lv
- Institute of Pathogenic Microbiology and Immunology, Inner Mongolia University for the Nationalities, Tongliao, Inner Mongolia 028041, P.R. China
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Abstract
Histone deacetylases (HDACs) are epigenetic regulators that regulate the histone tail, chromatin conformation, protein-DNA interaction, and even transcription. HDACs are also post-transcriptional modifiers that regulate the protein acetylation implicated in several pathophysiologic states. HDAC inhibitors have been highlighted as a novel category of anti-cancer drugs. To date, four HDAC inhibitors, Vorinostat, Romidepsin, Panobinostat, and Belinostat, have been approved by the United States Food and Drug Administration. Principally, these HDAC inhibitors are used for hematologic cancers in clinic with less severe side effects. Clinical trials are continuously expanding to address other types of cancer and also nonmalignant diseases. HDAC inhibition also results in beneficial outcomes in various types of neurodegenerative diseases, inflammation disorders, and cardiovascular diseases. In this review, we will briefly discuss 1) the roles of HDACs in the acquisition of a cancer's phenotype and the general outcome of the HDAC inhibitors in cancer, 2) the functional relevance of HDACs in cardiovascular diseases and the possible therapeutic implications of HDAC inhibitors in cardiovascular disease.
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Affiliation(s)
- Somy Yoon
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea
| | - Gwang Hyeon Eom
- Department of Pharmacology, Chonnam National University Medical School, Gwangju, Korea
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19
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Lauritzen KH, Kleppa L, Aronsen JM, Eide L, Carlsen H, Haugen ØP, Sjaastad I, Klungland A, Rasmussen LJ, Attramadal H, Storm-Mathisen J, Bergersen LH. Impaired dynamics and function of mitochondria caused by mtDNA toxicity leads to heart failure. Am J Physiol Heart Circ Physiol 2015; 309:H434-49. [PMID: 26055793 DOI: 10.1152/ajpheart.00253.2014] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/15/2014] [Accepted: 06/02/2015] [Indexed: 11/22/2022]
Abstract
Cardiac mitochondrial dysfunction has been implicated in heart failure of diverse etiologies. Generalized mitochondrial disease also leads to cardiomyopathy with various clinical manifestations. Impaired mitochondrial homeostasis may over time, such as in the aging heart, lead to cardiac dysfunction. Mitochondrial DNA (mtDNA), close to the electron transport chain and unprotected by histones, may be a primary pathogenetic site, but this is not known. Here, we test the hypothesis that cumulative damage of cardiomyocyte mtDNA leads to cardiomyopathy and heart failure. Transgenic mice with Tet-on inducible, cardiomyocyte-specific expression of a mutant uracil-DNA glycosylase 1 (mutUNG1) were generated. The mutUNG1 is known to remove thymine in addition to uracil from the mitochondrial genome, generating apyrimidinic sites, which obstruct mtDNA function. Following induction of mutUNG1 in cardiac myocytes by administering doxycycline, the mice developed hypertrophic cardiomyopathy, leading to congestive heart failure and premature death after ∼2 mo. The heart showed reduced mtDNA replication, severely diminished mtDNA transcription, and suppressed mitochondrial respiration with increased Pgc-1α, mitochondrial mass, and antioxidative defense enzymes, and finally failing mitochondrial fission/fusion dynamics and deteriorating myocardial contractility as the mechanism of heart failure. The approach provides a model with induced cardiac-restricted mtDNA damage for investigation of mtDNA-based heart disease.
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Affiliation(s)
- Knut H Lauritzen
- Department of Oral Biology, Brain and Muscle Energy Group, University of Oslo, Oslo, Norway; Department of Anatomy, Institute of Basic Medical Sciences, and Healthy Brain Ageing Centre, University of Oslo, Oslo, Norway
| | - Liv Kleppa
- Department of Oral Biology, Brain and Muscle Energy Group, University of Oslo, Oslo, Norway; Department of Anatomy, Institute of Basic Medical Sciences, and Healthy Brain Ageing Centre, University of Oslo, Oslo, Norway
| | - Jan Magnus Aronsen
- Institute for Experimental Medical Research, Oslo University Hospital Ullevål and University of Oslo, Oslo, Norway; KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, Norway, Oslo, Norway
| | - Lars Eide
- Department of Medical Biochemistry, University of Oslo, Oslo, Norway
| | - Harald Carlsen
- Department of Nutrition Research, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Øyvind P Haugen
- Department of Oral Biology, Brain and Muscle Energy Group, University of Oslo, Oslo, Norway; Department of Anatomy, Institute of Basic Medical Sciences, and Healthy Brain Ageing Centre, University of Oslo, Oslo, Norway
| | - Ivar Sjaastad
- Institute for Experimental Medical Research, Oslo University Hospital Ullevål and University of Oslo, Oslo, Norway; KG Jebsen Cardiac Research Center and Center for Heart Failure Research, University of Oslo, Norway, Oslo, Norway
| | - Arne Klungland
- Department of Nutrition Research, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway; Institute of Medical Microbiology, Oslo University Hospital, Oslo, Norway
| | - Lene Juel Rasmussen
- Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark; Department of Cellular and Molecular Medicine, University of Copenhagen, Denmark
| | - Håvard Attramadal
- Institute for Surgical Research, Oslo University Hospital, Oslo, Norway; and Center for Heart Failure Research, University of Oslo, Oslo, Norway
| | - Jon Storm-Mathisen
- Department of Anatomy, Institute of Basic Medical Sciences, and Healthy Brain Ageing Centre, University of Oslo, Oslo, Norway
| | - Linda H Bergersen
- Department of Oral Biology, Brain and Muscle Energy Group, University of Oslo, Oslo, Norway; Center for Healthy Aging, University of Copenhagen, Copenhagen, Denmark;
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Cunningham KF, Beeson GC, Beeson CC, Baicu CF, Zile MR, McDermott PJ. Estrogen-Related Receptor α (ERRα) is required for adaptive increases in PGC-1 isoform expression during electrically stimulated contraction of adult cardiomyocytes in sustained hypoxic conditions. Int J Cardiol 2015; 187:393-400. [PMID: 25841134 DOI: 10.1016/j.ijcard.2015.03.353] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/31/2014] [Revised: 02/17/2015] [Accepted: 03/22/2015] [Indexed: 12/20/2022]
Abstract
BACKGROUND AND OBJECTIVES In adult myocardium, Estrogen-Related Receptor α (ERRα) programs energetic capacity of cardiomyocytes by regulating expression of target genes required for mitochondrial biogenesis, fatty acid metabolism and oxidative phosphorylation. Transcriptional activation by ERRα is dependent on the α or β isoform of Peroxisome Proliferator-Activated Receptor γ Coactivator-1 (PGC-1). This study utilized a model of continuously contracting adult cardiomyocytes to determine the effects of sustained oxygen reduction (hypoxia) on ERRα target gene expression. METHODS AND RESULTS Adult feline cardiomyocytes in primary culture were electrically stimulated to contract at 1 Hz in either normoxia (21% O2) or hypoxia (0.5% O2). Compared to normoxia, hypoxia increased PGC-1α mRNA and PGC-1β mRNA levels by 16-fold and 14-fold after 24h. ERRα mRNA levels were increased 3-fold by hypoxia over the same time period. Treatment of cardiomyocytes with XCT-790, an ERRα inverse agonist, caused knockdown of ERRα protein expression. The increases in PGC-1 mRNA levels in response to hypoxia were blocked by XCT-790 treatment, which indicates that expression of PGC-1 isoforms is dependent on ERRα activity. The products of two ERRα target genes required for energy metabolism, Cox6c mRNA and Fabp3 mRNA, increased by 4.5-fold and 3.5 fold after 24h of hypoxia as compared to normoxic controls. These increases were blocked by XCT-790 treatment of hypoxic cardiomyocytes with a concomitant decrease in ERRα expression. CONCLUSIONS ERRα activity is required to increase expression of PGC-1 isoforms and downstream target genes as part of the adaptive response of contracting adult cardiomyocytes to sustained hypoxia.
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Affiliation(s)
- Kathryn F Cunningham
- Gazes Cardiac Research Institute, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Gyda C Beeson
- Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Craig C Beeson
- Department of Pharmaceutical and Biomedical Sciences, Medical University of South Carolina, Charleston, SC, USA
| | - Catalin F Baicu
- Gazes Cardiac Research Institute, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA
| | - Michael R Zile
- Gazes Cardiac Research Institute, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA; Ralph H. Johnson Department of Veterans Affairs Medical Center, Charleston, SC, USA
| | - Paul J McDermott
- Gazes Cardiac Research Institute, Department of Medicine, Medical University of South Carolina, Charleston, SC, USA; Ralph H. Johnson Department of Veterans Affairs Medical Center, Charleston, SC, USA.
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Eom GH, Kook H. Posttranslational modifications of histone deacetylases: Implications for cardiovascular diseases. Pharmacol Ther 2014; 143:168-80. [DOI: 10.1016/j.pharmthera.2014.02.012] [Citation(s) in RCA: 65] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/20/2014] [Accepted: 02/25/2014] [Indexed: 02/08/2023]
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Slot IGM, Schols AMWJ, Vosse BAH, Kelders MCJM, Gosker HR. Hypoxia differentially regulates muscle oxidative fiber type and metabolism in a HIF-1α-dependent manner. Cell Signal 2014; 26:1837-45. [PMID: 24794533 DOI: 10.1016/j.cellsig.2014.04.016] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2014] [Accepted: 04/27/2014] [Indexed: 12/12/2022]
Abstract
Loss of skeletal muscle oxidative fiber types and mitochondrial capacity is a hallmark of chronic obstructive pulmonary disease and chronic heart failure. Based on in vivo human and animal studies, tissue hypoxia has been hypothesized as determinant, but the direct effect of hypoxia on muscle oxidative phenotype remains to be established. Hence, we determined the effect of hypoxia on in vitro cultured muscle cells, including gene and protein expression levels of mitochondrial components, myosin isoforms (reflecting slow-oxidative versus fast-glycolytic fibers), and the involvement of the regulatory PPAR/PGC-1α pathway. We found that hypoxia inhibits the PPAR/PGC-1α pathway and the expression of mitochondrial components through HIF-1α. However, in contrast to our hypothesis, hypoxia stimulated the expression of slow-oxidative type I myosin via HIF-1α. Collectively, this study shows that hypoxia differentially regulates contractile and metabolic components of muscle oxidative phenotype in a HIF-1α-dependent manner.
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Affiliation(s)
- Ilse G M Slot
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
| | - Annemie M W J Schols
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
| | - Bettine A H Vosse
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
| | - Marco C J M Kelders
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
| | - Harry R Gosker
- Department of Respiratory Medicine, NUTRIM School for Nutrition, Toxicology and Metabolism, Maastricht University Medical Centre+, PO Box 5800, 6202 AZ Maastricht, The Netherlands.
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Zhang C, Shao M, Yang H, Chen L, Yu L, Cong W, Tian H, Zhang F, Cheng P, Jin L, Tan Y, Li X, Cai L, Lu X. Attenuation of hyperlipidemia- and diabetes-induced early-stage apoptosis and late-stage renal dysfunction via administration of fibroblast growth factor-21 is associated with suppression of renal inflammation. PLoS One 2013; 8:e82275. [PMID: 24349242 DOI: 10.1371/journal.pone.0082275] [Citation(s) in RCA: 60] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 11/01/2013] [Indexed: 12/21/2022] Open
Abstract
Background Lipotoxicity is a key feature of the pathogenesis of diabetic kidney disease, and is attributed to excessive lipid accumulation (hyperlipidemia). Increasing evidence suggests that fibroblast growth factor (FGF)21 has a crucial role in lipid metabolism under diabetic conditions. Objective The present study investigated whether FGF21 can prevent hyperlipidemia- or diabetes-induced renal damage, and if so, the possible mechanism. Methods Mice were injected with free fatty acids (FFAs, 10 mg/10 g body weight) or streptozotocin (150 mg/kg) to establish a lipotoxic model or type 1 diabetic model, respectively. Simultaneously the mice were treated with FGF21 (100 µg/kg) for 10 or 80 days. The kidney weight-to-tibia length ratio and renal function were assessed. Systematic and renal lipid levels were detected by ELISA and Oil Red O staining. Renal apoptosis was examined by TUNEL assay. Inflammation, oxidative stress, and fibrosis were assessed by Western blot. Results Acute FFA administration and chronic diabetes were associated with lower kidney-to-tibia length ratio, higher lipid levels, severe renal apoptosis and renal dysfunction. Obvious inflammation, oxidative stress and fibrosis also observed in the kidney of both mice models. Deletion of the fgf21 gene further enhanced the above pathological changes, which were significantly prevented by administration of exogenous FGF21. Conclusion These results suggest that FFA administration and diabetes induced renal damage, which was further enhanced in FGF21 knock-out mice. Administration of FGF21 significantly prevented both FFA- and diabetes-induced renal damage partially by decreasing renal lipid accumulation and suppressing inflammation, oxidative stress, and fibrosis.
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