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Vemuri V, Kratholm N, Nagarajan D, Cathey D, Abdelbaset-Ismail A, Tan Y, Straughn A, Cai L, Huang J, Kakar SS. Withaferin A as a Potential Therapeutic Target for the Treatment of Angiotensin II-Induced Cardiac Cachexia. Cells 2024; 13:783. [PMID: 38727319 PMCID: PMC11083229 DOI: 10.3390/cells13090783] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/09/2024] [Revised: 04/19/2024] [Accepted: 04/24/2024] [Indexed: 05/13/2024] Open
Abstract
In our previous studies, we showed that the generation of ovarian tumors in NSG mice (immune-compromised) resulted in the induction of muscle and cardiac cachexia, and treatment with withaferin A (WFA; a steroidal lactone) attenuated both muscle and cardiac cachexia. However, our studies could not address if these restorations by WFA were mediated by its anti-tumorigenic properties that might, in turn, reduce the tumor burden or WFA's direct, inherent anti-cachectic properties. To address this important issue, in our present study, we used a cachectic model induced by the continuous infusion of Ang II by implanting osmotic pumps in immunocompetent C57BL/6 mice. The continuous infusion of Ang II resulted in the loss of the normal functions of the left ventricle (LV) (both systolic and diastolic), including a significant reduction in fractional shortening, an increase in heart weight and LV wall thickness, and the development of cardiac hypertrophy. The infusion of Ang II also resulted in the development of cardiac fibrosis, and significant increases in the expression levels of genes (ANP, BNP, and MHCβ) associated with cardiac hypertrophy and the chemical staining of the collagen abundance as an indication of fibrosis. In addition, Ang II caused a significant increase in expression levels of inflammatory cytokines (IL-6, IL-17, MIP-2, and IFNγ), NLRP3 inflammasomes, AT1 receptor, and a decrease in AT2 receptor. Treatment with WFA rescued the LV functions and heart hypertrophy and fibrosis. Our results demonstrated, for the first time, that, while WFA has anti-tumorigenic properties, it also ameliorates the cardiac dysfunction induced by Ang II, suggesting that it could be an anticachectic agent that induces direct effects on cardiac muscles.
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Affiliation(s)
- Vasa Vemuri
- Department of Physiology, University of Louisville, Louisville, KY 40202, USA; (V.V.); (N.K.); (D.N.)
| | - Nicholas Kratholm
- Department of Physiology, University of Louisville, Louisville, KY 40202, USA; (V.V.); (N.K.); (D.N.)
| | - Darini Nagarajan
- Department of Physiology, University of Louisville, Louisville, KY 40202, USA; (V.V.); (N.K.); (D.N.)
| | - Dakotah Cathey
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; (D.C.); (Y.T.); (L.C.); (J.H.)
- Pediatric Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA;
- Department of Anesthesiology and Perioperative Medicine, University of Louisville, Louisville, KY 40202, USA
| | - Ahmed Abdelbaset-Ismail
- Pediatric Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA;
| | - Yi Tan
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; (D.C.); (Y.T.); (L.C.); (J.H.)
- Pediatric Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA;
| | - Alex Straughn
- Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA;
| | - Lu Cai
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; (D.C.); (Y.T.); (L.C.); (J.H.)
- Pediatric Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY 40202, USA;
| | - Jiapeng Huang
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY 40202, USA; (D.C.); (Y.T.); (L.C.); (J.H.)
- Department of Anesthesiology and Perioperative Medicine, University of Louisville, Louisville, KY 40202, USA
| | - Sham S. Kakar
- Department of Physiology, University of Louisville, Louisville, KY 40202, USA; (V.V.); (N.K.); (D.N.)
- Brown Cancer Center, University of Louisville, Louisville, KY 40202, USA;
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2
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Zhang X, Zheng C, Gao Z, Chen H, Li K, Wang L, Zheng Y, Li C, Zhang H, Gong M, Zhang H, Meng Y. SLC7A11/xCT Prevents Cardiac Hypertrophy by Inhibiting Ferroptosis. Cardiovasc Drugs Ther 2021; 36:437-447. [PMID: 34259984 DOI: 10.1007/s10557-021-07220-z] [Citation(s) in RCA: 44] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 06/12/2021] [Indexed: 12/22/2022]
Abstract
PURPOSE Systemic hypertension may induce adverse hypertrophy of the left cardiac ventricle. Pathological cardiac hypertrophy is a common cause of heart failure. We investigated the significance of ferroptosis repressor xCT in hypertrophic cardiomyopathy. METHODS xCT expression in angiotensin II (Ang II)-treated mouse hearts and rat cardiomyocytes was determined using qRT-PCR and Western blotting. Cardiac hypertrophy was induced by Ang II infusion in xCT knockout mice and their wildtype counterparts. Blood pressure, cardiac pump function, and pathological changes of cardiac remodeling were analyzed in these mice. Cell death, oxidative stress, and xCT-mediated ferroptosis were examined in Ang II-treated rat cardiomyocytes. RESULTS After Ang II infusion, xCT was downregulated at day 1 but upregulated at day 14 at both mRNA and protein levels. It was also decreased in Ang II-treated cardiomyocytes, but not in cardiofibroblasts. Inhibition of xCT exacerbated cardiomyocyte hypertrophy and boosted the levels of ferroptosis biomarkers Ptgs2, malondialdehyde, and reactive oxygen species induced by Ang II, while overexpression of xCT opposed these detrimental effects. Furthermore, knockout of xCT aggravated Ang II-mediated mouse cardiac fibrosis, hypertrophy, and dysfunction. Ferrostatin-1, a ferroptosis inhibitor, alleviated the exacerbation of cardiomyocyte hypertrophy caused by inhibiting xCT in cultured rat cells or ablating xCT in mice. CONCLUSION xCT acts as a suppressor in Ang II-mediated cardiac hypertrophy by blocking ferroptosis. Positive modulation of xCT may therefore represent a novel therapeutic approach against cardiac hypertrophic diseases.
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Affiliation(s)
- Xiyu Zhang
- Department of Pathology, Beijing Key Laboratory of Metabolic Disorders Related Cardiovascular Diseases, Beijing Lab for Cardiovascular Precision Medicine, Capital Medical University, Beijing, China
| | - Cuiting Zheng
- Department of Pathology, Beijing Key Laboratory of Metabolic Disorders Related Cardiovascular Diseases, Beijing Lab for Cardiovascular Precision Medicine, Capital Medical University, Beijing, China
| | - Zhenqiang Gao
- Department of Pathology, Beijing Key Laboratory of Metabolic Disorders Related Cardiovascular Diseases, Beijing Lab for Cardiovascular Precision Medicine, Capital Medical University, Beijing, China
| | - Hongyu Chen
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Kai Li
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China
| | - Lingling Wang
- Department of Pathology, Beijing Shijitan Hospital, Capital Medical University, Beijing, China
| | - Yuanyuan Zheng
- Department of Pharmacology, Capital Medical University, Beijing, China
| | - Chunjia Li
- Department of Rheumatology, China-Japan Friendship Hospital, Beijing, China
| | - Hongjia Zhang
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Beijing Aortic Disease Center, Beijing Laboratory for Cardiovascular Precision Medicine, and Beijing Engineering Research Center of Vascular Prostheses, Capital Medical University, Beijing, China
| | - Ming Gong
- Department of Cardiovascular Surgery, Beijing Anzhen Hospital, Beijing Aortic Disease Center, Beijing Laboratory for Cardiovascular Precision Medicine, and Beijing Engineering Research Center of Vascular Prostheses, Capital Medical University, Beijing, China
| | - Hongbing Zhang
- State Key Laboratory of Medical Molecular Biology, Department of Physiology, Institute of Basic Medical Sciences and School of Basic Medicine, Peking Union Medical College, Chinese Academy of Medical Sciences, Beijing, China.
| | - Yan Meng
- Department of Pathology, Beijing Key Laboratory of Metabolic Disorders Related Cardiovascular Diseases, Beijing Lab for Cardiovascular Precision Medicine, Capital Medical University, Beijing, China.
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3
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Ahmed LA, Shiha NA, Attia AS. Escitalopram Ameliorates Cardiomyopathy in Type 2 Diabetic Rats via Modulation of Receptor for Advanced Glycation End Products and Its Downstream Signaling Cascades. Front Pharmacol 2021; 11:579206. [PMID: 33384599 PMCID: PMC7770111 DOI: 10.3389/fphar.2020.579206] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 11/11/2020] [Indexed: 12/20/2022] Open
Abstract
Type 2 diabetes mellitus (T2DM) has been recognized as a known risk factor for cardiovascular diseases. Additionally, studies have shown the prevalence of depression among people with diabetes. Thus, the current study aimed to investigate the possible beneficial effects of escitalopram, a selective serotonin reuptake inhibitor, on metabolic changes and cardiac complications in type 2 diabetic rats. Diabetes was induced by feeding the rats high fat-high fructose diet (HFFD) for 8 weeks followed by a subdiabetogenic dose of streptozotocin (STZ) (35 mg/kg, i. p.). Treatment with escitalopram (10 mg/kg/day; p. o.) was then initiated for 4 weeks. At the end of the experiment, electrocardiography was performed and blood samples were collected for determination of glycemic and lipid profiles. Animals were then euthanized and heart samples were collected for biochemical and histopathological examinations. Escitalopram alleviated the HFFD/STZ-induced metabolic and cardiac derangements as evident by improvement of oxidative stress, inflammatory, fibrogenic and apoptotic markers in addition to hypertrophy and impaired conduction. These results could be secondary to its beneficial effects on the glycemic control and hence the reduction of receptor for advanced glycation end products content as revealed in the present study. In conclusion, escitalopram could be considered a favorable antidepressant medication in diabetic patients as it seems to positively impact the glycemic control in diabetes in addition to prevention of its associated cardiovascular complications.
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Affiliation(s)
- Lamiaa A Ahmed
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Nesma A Shiha
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Amina S Attia
- Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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Zhang Y, Somers KR, Becari C, Polonis K, Pfeifer MA, Allen AM, Kellogg TA, Covassin N, Singh P. Comparative Expression of Renin-Angiotensin Pathway Proteins in Visceral Versus Subcutaneous Fat. Front Physiol 2018; 9:1370. [PMID: 30364113 PMCID: PMC6191467 DOI: 10.3389/fphys.2018.01370] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2018] [Accepted: 09/10/2018] [Indexed: 01/12/2023] Open
Abstract
Body fat distribution contributes to obesity-related metabolic and cardiovascular disorders. Visceral fat is more detrimental than subcutaneous fat. However, the mechanisms underlying visceral fat-mediated cardiometabolic dysregulation are not completely understood. Localized increases in expression of the renin angiotensin system (RAS) in adipose tissue (AT) may be implicated. We therefore investigated mRNA and protein expression of RAS components in visceral versus subcutaneous AT using paired samples from individuals undergoing surgery (N = 20, body mass index: 45.6 ± 6.2 kg/m2, and age: 44.6 ± 9.1 years). We also examined RAS-related proteins in AT obtained from individuals on renin angiotensin aldosterone system (RAAS) targeted drugs (N = 10, body mass index: 47.2 ± 9.3 kg/m2, and age: 53.3 ± 10.1 years). Comparison of protein expression between subcutaneous and visceral AT samples showed an increase in renin (p = 0.004) and no change in angiotensinogen (p = 0.987) expression in visceral AT. Among proteins involved in angiotensin peptide generation, angiotensin converting enzyme (p = 0.02) was increased in subcutaneous AT while chymase (p = 0.001) and angiotensin converting enzyme-2 (p = 0.001) were elevated in visceral fat. Furthermore, visceral fat expression of angiotensin II type-2 receptor (p = 0.007) and angiotensin II type-1 receptor (p = 0.031) was higher, and MAS receptor (p < 0.001) was lower. Phosphorylated-p53 (p = 0.147), AT fibrosis (p = 0.138) and average adipocyte size (p = 0.846) were similar in the two depots. Nonetheless, visceral AT showed increased mRNA expression of inflammatory (TNFα, p < 0.001; IL-6, p = 0.001) and oxidative stress markers (NOX2, p = 0.038; NOX4, p < 0.001). Of note, mRNA and protein expression of RAS components did not differ between subjects taking or not taking RAAS related drugs. In summary, several RAS related proteins are differentially expressed in subcutaneous versus visceral AT. This differential expression may not alter AngII but likely increases Ang1-7 generation in visceral fat. These potential differences in active angiotensin peptides and receptor expression in the two depots suggest that localized RAS may not be involved in differences in visceral vs subcutaneous AT function in obese individuals. Our findings do not support a role for localized RAS differences in visceral fat-mediated development of cardiovascular and metabolic pathology.
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Affiliation(s)
- Yuebo Zhang
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Kiran R Somers
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Christiane Becari
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Katarzyna Polonis
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Michaela A Pfeifer
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Alina M Allen
- Division of Gastroenterology and Hepatology, Mayo Clinic, Rochester, MN, United States
| | - Todd A Kellogg
- Department of Surgery, Mayo Clinic, Rochester, MN, United States
| | - Naima Covassin
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
| | - Prachi Singh
- Department of Cardiovascular Medicine, Mayo Clinic, Rochester, MN, United States
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5
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Zhang M, Zhang Y, Xu E, Mohibi S, de Anda DM, Jiang Y, Zhang J, Chen X. Rbm24, a target of p53, is necessary for proper expression of p53 and heart development. Cell Death Differ 2018; 25:1118-1130. [PMID: 29358667 PMCID: PMC5988652 DOI: 10.1038/s41418-017-0029-8] [Citation(s) in RCA: 61] [Impact Index Per Article: 10.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2017] [Revised: 09/29/2017] [Accepted: 10/19/2017] [Indexed: 01/08/2023] Open
Abstract
Activation of p53-dependent apoptosis is critical for tumor suppression but aberrant activation of p53 also leads to developmental defects and heart failure. Here, we found that Rbm24 RNA-binding protein, a target of p53, regulates p53 mRNA translation. Mechanistically, we found that through binding to p53 mRNA and interaction with translation initiation factor eIF4E, Rbm24 prevents eIF4E from binding to p53 mRNA and inhibits the assembly of translation initiation complex. Importantly, we showed that mice deficient in Rbm24 die in utero due to the endocardial cushion defect in the heart at least in part due to aberrant activation of p53-dependent apoptosis. We also showed that the heart developmental defect in Rbm24-null mice can be partially rescued by p53 deficiency through decreased apoptosis in the heart. Together, we postulate that the p53-Rbm24 loop is critical for the heart development and may be explored for mitigating congenital heart diseases and heart failure.
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Affiliation(s)
- Min Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
- College of Life Science and Technology, Huazhong Agricultural University, Wuhan, China
| | - Yanhong Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Enshun Xu
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Shakur Mohibi
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Danielle Michelle de Anda
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Yuqian Jiang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Jin Zhang
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA
| | - Xinbin Chen
- Comparative Oncology Laboratory, Schools of Veterinary Medicine and Medicine, University of California at Davis, Davis, CA, 95616, USA.
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6
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Yan M, Yang S, Meng F, Zhao Z, Tian Z, Yang P. MicroRNA 199a-5p induces apoptosis by targeting JunB. Sci Rep 2018; 8:6699. [PMID: 29703907 PMCID: PMC5923206 DOI: 10.1038/s41598-018-24932-9] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2017] [Accepted: 04/03/2018] [Indexed: 01/18/2023] Open
Abstract
MicroRNAs participate in a variety of physiological and pathophysiological processes in various organs including the heart. Our previous work revealed that the level of miR-199a-5p was significantly higher in failing hearts than in control hearts. However, whether it is associated with the progression of heart failure (HF) and mediates cardiomyocyte apoptosis remained unclear. In the present study, we used various biochemical and molecular biological approaches to investigate the changes in miR-199a-5p levels in failing hearts in a rat model induced by acute myocardial infarction. We found that miR-199a-5p levels in the heart increased with the progression of HF, and overexpression of miR-199a-5p significantly increased apoptosis in untreated H9C2 cells and potentiated angiotensin II-induced apoptosis. Thus, our results indicate that miR-199a-5p is involved in the progression of HF and mediates cardiomyocyte apoptosis. We also confirmed that JunB, a member of the activator protein-1 transcription factor family, is one of direct targets of miR-199a-5p via a dual-luciferase reporter assay and mutagenesis on the 3' untranslated region of the JunB gene. Consistent with the above findings, overexpression of JunB in H9c2 cells suppressed cell apoptosis. Based on our findings, miR-199a-5p induces apoptosis by targeting JunB.
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Affiliation(s)
- Mengjie Yan
- Department of Internal Medicine and Cardiology, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Sibao Yang
- Department of Internal Medicine and Cardiology, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Fanbo Meng
- Department of Internal Medicine and Cardiology, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Zhihui Zhao
- College of Animal Science and Veterinary Medicine, Jilin University, Changchun, 130062, China
| | - Zhisen Tian
- Department of orthopedics, China-Japan Union Hospital of Jilin University, Changchun, 130033, China
| | - Ping Yang
- Department of Internal Medicine and Cardiology, China-Japan Union Hospital of Jilin University, Changchun, 130033, China.
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7
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Gu J, Yan X, Dai X, Wang Y, Lin Q, Xiao J, Zhou S, Zhang J, Wang K, Zeng J, Xin Y, Barati MT, Zhang C, Bai Y, Li Y, Epstein PN, Wintergerst KA, Li X, Tan Y, Cai L. Metallothionein Preserves Akt2 Activity and Cardiac Function via Inhibiting TRB3 in Diabetic Hearts. Diabetes 2018; 67:507-517. [PMID: 29079702 PMCID: PMC5828458 DOI: 10.2337/db17-0219] [Citation(s) in RCA: 28] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2017] [Accepted: 10/20/2017] [Indexed: 12/17/2022]
Abstract
Cardiac insulin resistance is a key pathogenic factor for diabetic cardiomyopathy (DCM), but the mechanism remains largely unclear. We found that diabetic hearts exhibited decreased phosphorylation of total Akt and isoform Akt2 but not Akt1 in wild-type (WT) male FVB mice, which was accompanied by attenuation of Akt downstream glucose metabolic signal. All of these signal changes were not observed in metallothionein cardiac-specific transgenic (MT-TG) hearts. Furthermore, insulin-induced glucose metabolic signals were attenuated only in WT diabetic hearts. In addition, diabetic hearts exhibited increased Akt-negative regulator tribbles pseudokinase 3 (TRB3) expression only in WT mice, suggesting that MT may preserve Akt2 function via inhibiting TRB3. Moreover, MT prevented tert-butyl hydroperoxide (tBHP)-reduced insulin-stimulated Akt2 phosphorylation in MT-TG cardiomyocytes, which was abolished by specific silencing of Akt2. Specific silencing of TRB3 blocked tBHP inhibition of insulin-stimulated Akt2 phosphorylation in WT cardiomyocytes, whereas overexpression of TRB3 in MT-TG cardiomyocytes and hearts abolished MT preservation of insulin-stimulated Akt2 signals and MT prevention of DCM. Most importantly, supplementation of Zn to induce MT preserved cardiac Akt2 signals and prevented DCM. These results suggest that diabetes-inhibited cardiac Akt2 function via TRB3 upregulation leads to aberrant cardiac glucose metabolism. MT preservation of cardiac Akt2 function by inhibition of TRB3 prevents DCM.
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MESH Headings
- Animals
- Cell Cycle Proteins/antagonists & inhibitors
- Cell Cycle Proteins/genetics
- Cell Cycle Proteins/metabolism
- Cells, Cultured
- Diabetes Mellitus, Type 1/drug therapy
- Diabetes Mellitus, Type 1/metabolism
- Diabetes Mellitus, Type 1/pathology
- Diabetes Mellitus, Type 1/physiopathology
- Heart/drug effects
- Heart/physiopathology
- Hypoglycemic Agents/pharmacology
- Hypoglycemic Agents/therapeutic use
- Insulin/pharmacology
- Insulin/therapeutic use
- Insulin Resistance
- Lipopolysaccharides/toxicity
- Male
- Metallothionein/genetics
- Metallothionein/metabolism
- Mice
- Mice, Mutant Strains
- Mice, Transgenic
- Myocardium/enzymology
- Myocardium/metabolism
- Myocardium/pathology
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Organ Specificity
- Oxidants/toxicity
- Oxidative Stress/drug effects
- Phosphorylation/drug effects
- Protein Processing, Post-Translational/drug effects
- Proto-Oncogene Proteins c-akt/antagonists & inhibitors
- Proto-Oncogene Proteins c-akt/genetics
- Proto-Oncogene Proteins c-akt/metabolism
- RNA Interference
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Affiliation(s)
- Junlian Gu
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaoqing Yan
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaozhen Dai
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- School of Biomedicine, Chengdu Medical College, Chengdu, Sichuan, China
| | - Yuehui Wang
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Qian Lin
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
| | - Jian Xiao
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Shanshan Zhou
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Jian Zhang
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Kai Wang
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Jun Zeng
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Ying Xin
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Key Laboratory of Pathobiology, Ministry of Education, Jilin University, Changchun, China
| | | | - Chi Zhang
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Yang Bai
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Departments of Geriatrics, Cardiovascular Disorders and Cardiac Surgery, The First Hospital of Jilin University, Changchun, China
| | - Yan Li
- Department of Surgery, University of Louisville, Louisville, KY
| | - Paul N Epstein
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
| | - Kupper A Wintergerst
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
- Division of Endocrinology, Department of Pediatrics, University of Louisville, Louisville, KY
| | - Xiaokun Li
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
| | - Yi Tan
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
| | - Lu Cai
- Chinese-American Research Institute for Diabetic Complications, School of Pharmaceutical Sciences and the First Affiliated Hospital at the Wenzhou Medical University, Wenzhou, China
- Children's Hospital Research Institute, Department of Pediatrics, University of Louisville, Louisville, KY
- Department of Pharmacology and Toxicology, University of Louisville, Louisville, KY
- Wendy L. Novak Diabetes Care Center, Louisville, KY
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8
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Bryan CE, Bossart GD, Christopher SJ, Davis WC, Kilpatrick LE, McFee WE, O'Brien TX. Selenium protein identification and profiling by mass spectrometry: A tool to assess progression of cardiomyopathy in a whale model. J Trace Elem Med Biol 2017; 44:40-49. [PMID: 28965599 PMCID: PMC5657608 DOI: 10.1016/j.jtemb.2017.05.005] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/14/2016] [Revised: 05/18/2017] [Accepted: 05/19/2017] [Indexed: 11/19/2022]
Abstract
Non-ischemic cardiomyopathy is a leading cause of congestive heart failure and sudden cardiac death in humans and in some cases the etiology of cardiomyopathy can include the downstream effects of an essential element deficiency. Of all mammal species, pygmy sperm whales (Kogia breviceps) present the greatest known prevalence of cardiomyopathy with more than half of examined individuals indicating the presence of cardiomyopathy from gross and histo-pathology. Several factors such as genetics, infectious agents, contaminants, biotoxins, and inappropriate dietary intake (vitamins, selenium, mercury, and pro-oxidants), may contribute to the development of idiopathic cardiomyopathy in K. breviceps. Due to the important role Se can play in antioxidant biochemistry and protein formation, Se protein presence and relative abundance were explored in cardiomyopathy related cases. Selenium proteins were separated and detected by multi-dimension liquid chromatography inductively coupled plasma mass spectrometry (LC-ICP-MS), Se protein identification was performed by liquid chromatography electrospray tandem mass spectrometry (LC-ESI-MS/MS), and Se protein profiles were examined in liver (n=30) and heart tissue (n=5) by SEC/UV/ICP-MS detection. Data collected on selenium proteins was evaluated in the context of individual animal trace element concentration, life history, and histological information. Selenium containing protein peak profiles varied in presence and intensity between animals with no pathological findings of cardiomyopathy and animals exhibiting evidence of cardiomyopathy. In particular, one class of proteins, metallothioneins, was found to be associated with Se and was in greater abundance in animals with cardiomyopathy than those with no pathological findings. Profiling Se species with SEC/ICP-MS proved to be a useful tool to identify Se protein pattern differences between heart disease stages in K. breviceps and an approach similar to this may be applied to other species to study Se protein associations with cardiomyopathy.
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Affiliation(s)
- Colleen E Bryan
- Chemical Sciences Division, National Institute of Standards and Technology, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, USA.
| | | | - Steven J Christopher
- Chemical Sciences Division, National Institute of Standards and Technology, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, USA
| | - W Clay Davis
- Chemical Sciences Division, National Institute of Standards and Technology, Hollings Marine Laboratory, 331 Fort Johnson Road, Charleston, SC 29412, USA
| | - Lisa E Kilpatrick
- Biomolecular Measurement Division, National Institute of Standards and Technology, 100 Bureau Drive, Gaithersburg, MD 20899, USA
| | - Wayne E McFee
- Center for Coastal Environmental Health and Biomolecular Research, National Ocean Service, National Oceanic and Atmospheric Administration, 219 Fort Johnson Road, Charleston, SC 29412, USA
| | - Terrence X O'Brien
- Department of Medicine, Division of Cardiology, Medical University of South Carolina, Carolina 25 Courtenay Dr. ART 7063 and the Office of Research and Development, Ralph H. Johnson Veterans Administration Medical Center, Charleston, SC 29425, USA
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9
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Sulforaphane Prevents Angiotensin II-Induced Testicular Cell Death via Activation of NRF2. OXIDATIVE MEDICINE AND CELLULAR LONGEVITY 2017; 2017:5374897. [PMID: 28191275 PMCID: PMC5278228 DOI: 10.1155/2017/5374897] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/31/2016] [Revised: 11/28/2016] [Accepted: 12/12/2016] [Indexed: 11/17/2022]
Abstract
Although angiotensin II (Ang II) was reported to facilitate sperm motility and intratesticular sperm transport, recent findings shed light on the efficacy of Ang II in stimulating inflammatory events in testicular peritubular cells, effect of which may play a role in male infertility. It is still unknown whether Ang II can induce testicular apoptotic cell death, which may be a more direct action of Ang II in male infertility. Therefore, the present study aims to determine whether Ang II can induce testicular apoptotic cell death and whether this action can be prevented by sulforaphane (SFN) via activating nuclear factor (erythroid-derived 2)-like 2 (NRF2), the governor of antioxidant-redox signalling. Eight-week-old male C57BL/6J wild type (WT) and Nrf2 gene knockout mice were treated with Ang II, in the presence or absence of SFN. In WT mice, SFN activated testicular NRF2 expression and function, along with a marked attenuation in Ang II-induced testicular oxidative stress, inflammation, endoplasmic reticulum stress, and apoptotic cell death. Deletion of the Nrf2 gene led to a complete abolishment of these efficacies of SFN. The present study indicated that Ang II may result in testicular apoptotic cell death, which can be prevented by SFN via the activation of NRF2.
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10
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Wang XM, Xiao H, Liu LL, Cheng D, Li XJ, Si LY. FGF21 represses cerebrovascular aging via improving mitochondrial biogenesis and inhibiting p53 signaling pathway in an AMPK-dependent manner. Exp Cell Res 2016; 346:147-56. [PMID: 27364911 DOI: 10.1016/j.yexcr.2016.06.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2016] [Revised: 06/02/2016] [Accepted: 06/25/2016] [Indexed: 12/21/2022]
Abstract
Cerebrovascular aging has a high relationship with stroke and neurodegenerative disease. In the present study, we evaluated the influence of fibroblast growth factor 21 (FGF21) on angiotensin (Ang II)-mediated cerebrovascular aging in human brain vascular smooth muscle cells (hBVSMCs). Ang II induced remarkable aging-phenotypes in hBVSMCs, including enhanced SA-β-gal staining and NBS1 protein expression. First, we used immunoblotting assay to confirm protein expression of FGF21 receptor (FGFR1) and the co-receptor β-Klotho in cultured hBVSMCs. Second, we found that FGF21 treatment partly prevented the aging-related changes induced by Ang II. FGF21 inhibited Ang II-enhanced ROS production/superoxide anion levels, rescued the Ang II-reduced Complex IV and citrate synthase activities, and suppressed the Ang II-induced meprin protein expression. Third, we showed that FGF21 not only inhibited the Ang II-induced p53 activation, but also blocked the action of Ang II on Siah-1-TRF signaling pathway which is upstream factors for p53 activation. At last, either chemical inhibition of AMPK signaling pathway by a specific antagonist Compound C or knockdown of AMPKα1/2 isoform using siRNA, successfully abolished the anti-aging action of FGF21 in hBVSMCs. These results indicate that FGF21 protects against Ang II-induced cerebrovascular aging via improving mitochondrial biogenesis and inhibiting p53 activation in an AMPK-dependent manner, and highlight the therapeutic value of FGF21 in cerebrovascular aging-related diseases such as stroke and neurodegenerative disease.
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Affiliation(s)
- Xiao-Mei Wang
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Hang Xiao
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Ling-Lin Liu
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Dang Cheng
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Xue-Jun Li
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China
| | - Liang-Yi Si
- Department of Geriatrics, Southwest Hospital, Third Military Medical University, Chongqing, China.
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11
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Watanabe Y, Yoshida M, Yamanishi K, Yamamoto H, Okuzaki D, Nojima H, Yasunaga T, Okamura H, Matsunaga H, Yamanishi H. Genetic analysis of genes causing hypertension and stroke in spontaneously hypertensive rats: Gene expression profiles in the kidneys. Int J Mol Med 2015; 36:712-24. [PMID: 26165378 PMCID: PMC4533772 DOI: 10.3892/ijmm.2015.2281] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2015] [Accepted: 06/25/2015] [Indexed: 12/15/2022] Open
Abstract
Spontaneously hypertensive rats (SHRs) and stroke-prone SHRs (SHRSP) are frequently used as models not only of essential hypertension and stroke, but also of attention-deficit hyperactivity disorder (ADHD). Normotensive Wistar-Kyoto (WKY) rats are normally used as controls in these studies. In the present study, we aimed to identify the genes causing hypertension and stroke, as well as the genes involved in ADHD using these rats. We previously analyzed gene expression profiles in the adrenal glands and brain. Since the kidneys can directly influence the functions of the cardiovascular, endocrine and sympathetic nervous systems, gene expression profiles in the kidneys of the 3 rat strains were examined using genome-wide microarray technology when the rats were 3 and 6 weeks old, a period in which rats are considered to be in a pre-hypertensive state. Gene expression profiles were compared between the SHRs and WKY rats and also between the SHRSP and SHRs. A total of 232 unique genes showing more than a 4-fold increase or less than a 4-fold decrease in expression were isolated as SHR- and SHRSP-specific genes. Candidate genes were then selected using two different web tools: the 1st tool was the Database for Annotation, Visualization and Integrated Discovery (DAVID), which was used to search for significantly enriched genes and categorized them using Gene Ontology (GO) terms, and the 2nd was Ingenuity Pathway Analysis (IPA), which was used to search for interactions among SHR- and also SHRSP‑specific genes. The analyses of SHR-specific genes using IPA revealed that B-cell CLL/lymphoma 6 (Bcl6) and SRY (sex determining region Y)-box 2 (Sox2) were possible candidate genes responsible for causing hypertension in SHRs. Similar analyses of SHRSP-specific genes revealed that angiotensinogen (Agt), angiotensin II receptor-associated protein (Agtrap) and apolipoprotein H (Apoh) were possible candidate genes responsible for triggering strokes. Since our results revealed that SHRSP-specific genes isolated from the kidneys of rats at 6 weeks of age, included 6 genes related to Huntington's disease, we discussed the genetic association between ADHD and Huntington's disease.
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Affiliation(s)
- Yuko Watanabe
- Hirakata General Hospital for Developmental Disorders, Hirakata, Osaka 573-0122, Japan
| | - Momoko Yoshida
- Hirakata General Hospital for Developmental Disorders, Hirakata, Osaka 573-0122, Japan
| | - Kyosuke Yamanishi
- Department of Neuropsychiatry, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hideyuki Yamamoto
- Institute for Advanced Medical Sciences, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Daisuke Okuzaki
- DNA-Chip Development Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Hiroshi Nojima
- DNA-Chip Development Center for Infectious Diseases, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Teruo Yasunaga
- Department of Genome Informatics, Research Institute for Microbial Diseases, Osaka University, Suita, Osaka 565-0871, Japan
| | - Haruki Okamura
- Institute for Advanced Medical Sciences, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hisato Matsunaga
- Department of Neuropsychiatry, Hyogo College of Medicine, Nishinomiya, Hyogo 663-8501, Japan
| | - Hiromichi Yamanishi
- Hirakata General Hospital for Developmental Disorders, Hirakata, Osaka 573-0122, Japan
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12
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Li B, Tian J, Sun Y, Xu TR, Chi RF, Zhang XL, Hu XL, Zhang YA, Qin FZ, Zhang WF. Activation of NADPH oxidase mediates increased endoplasmic reticulum stress and left ventricular remodeling after myocardial infarction in rabbits. Biochim Biophys Acta Mol Basis Dis 2015; 1852:805-15. [DOI: 10.1016/j.bbadis.2015.01.010] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2014] [Revised: 01/12/2015] [Accepted: 01/16/2015] [Indexed: 12/21/2022]
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13
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do Nascimento AM, de Lima EM, Boëchat GAP, Meyrelles SDS, Bissoli NS, Lenz D, Endringer DC, de Andrade TU. Testosterone induces apoptosis in cardiomyocytes by increasing proapoptotic signaling involving tumor necrosis factor-α and renin angiotensin system. Hum Exp Toxicol 2015; 34:1139-47. [DOI: 10.1177/0960327115571766] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
Anabolic androgenic steroids lead to cardiac complications and have been shown to exhibit proapoptotic effects in cardiac cells; however, the mechanism involved in those effects is unclear. The aim of this study was to assess whether apoptosis and the activation of caspase-3 (Casp-3) induced by testosterone in high concentrations involves increments in tumor necrosis factor-α (TNF-α) concentrations and angiotensin-converting enzyme (ACE) activity in cardiomyocytes (H9c2) cell cultures. Cardiomyocytes were treated with testosterone (5 × 10−6 mol/L), doxorubicin (9.2 × 10−6 mol/L), testosterone + etanercept (Eta; 6.67 × 10−5 mol/L), testosterone + losartan (Los; 10−7 mol/L), and testosterone + AC-DEVD-CHO (10−5 mol/L; Casp-3 inhibitor). Apoptosis was determined by flow cytometry and by the proteolytic activity of Casp-3. We demonstrated that incubation of H9c2 cells for 48 h with testosterone causes the apoptotic death of 60–70% of the cells and co-treatments with Eta, Los, or AC-DEVD-CHO reduced this effect. Testosterone also induces apoptosis (concentration dependent) and increases the proteolytic activity of Casp-3, which were reduced by co-treatments. TNF-α and ACE activities were elevated by testosterone treatment, while co-treatment with Los and Eta reduced these effects. We concluded that an interaction between testosterone, angiotensin II, and TNF-α induced apoptosis and Casp-3 activity in cultured cardiomyocytes, which contributed to the reduced viability of these cells induced by testosterone in toxic concentrations.
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Affiliation(s)
- AM do Nascimento
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
| | - EM de Lima
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
| | - GAP Boëchat
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
| | - SDS Meyrelles
- Department of Physiological Sciences, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - NS Bissoli
- Department of Physiological Sciences, Federal University of Espírito Santo, Espírito Santo, Brazil
| | - D Lenz
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
| | - DC Endringer
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
| | - TU de Andrade
- Department of Pharmacy, University Vila Velha, Espírito Santo, Brazil
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14
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Li C, Liu Y, Xie Z, Lu Q, Luo S. Stigmasterol protects against Ang II-induced proliferation of the A7r5 aortic smooth muscle cell-line. Food Funct 2015; 6:2266-72. [DOI: 10.1039/c5fo00031a] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Excessive proliferation of vascular smooth muscle cells is a crucial event in the pathogenesis of several cardiovascular diseases, including atherosclerosis and restenosis.
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Affiliation(s)
- Chunmei Li
- Department of Biochemistry and Molecular Biology
- Guangdong Pharmaceutical College
- Guangzhou
- China
| | - Yang Liu
- Department of Biochemistry and Molecular Biology
- Guangdong Pharmaceutical College
- Guangzhou
- China
| | - Zhe Xie
- Department of Biochemistry and Molecular Biology
- Guangdong Pharmaceutical College
- Guangzhou
- China
| | - Qun Lu
- Department of Biochemistry and Molecular Biology
- Guangdong Pharmaceutical College
- Guangzhou
- China
| | - Shaohong Luo
- Department of Biochemistry and Molecular Biology
- Guangdong Pharmaceutical College
- Guangzhou
- China
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15
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Ren M, Wang YM, Zhao J, Zhao J, Zhao ZM, Zhang TF, He J, Ren SP, Peng SQ. Metallothioneins attenuate paraquat-induced acute lung injury in mice through the mechanisms of anti-oxidation and anti-apoptosis. Food Chem Toxicol 2014; 73:140-7. [PMID: 25111661 DOI: 10.1016/j.fct.2014.07.039] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2014] [Revised: 07/06/2014] [Accepted: 07/31/2014] [Indexed: 02/06/2023]
Abstract
Paraquat (PQ) is a widely used herbicide, and lung is the primary target of PQ poisoning. Metallothionein (MT) is a potent antioxidant and free radical scavenger, and has been shown to play a protective role in lung injury induced by different stressors. This study was undertaken to evaluate the protective potential of MT against PQ-induced acute lung injury using MT-I/II null (MT(-/-)) mice. Wild-type (MT(+/+)) mice and MT(-/-) mice were given one intragastric administration of 50mg/kg PQ for 24h, and it was revealed that MT(-/-) mice were more susceptible to PQ-induced acute lung injury than MT(+/+) mice evidenced by the following findings. As compared with MT(+/+) mice, MT(-/-) mice presented more severe histopathological lesions in the lung, higher pulmonary malondialdehyde content, and more reduced pulmonary antioxidative enzymes activities. PQ also induced more apoptosis in pneumocytes from MT(-/-) mice, and the expressions of apoptosis-related proteins Bax, Bcl-2, cleaved-caspase-3, and the ratio of Bax/Bcl-2 were all more significantly increased in PQ-treated MT(-/-) mice. Our results clearly demonstrate that endogenous MT can attenuate PQ-induced acute lung injury, possibly through the mechanisms of anti-oxidation and anti-apoptosis.
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Affiliation(s)
- Ming Ren
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China; Department of Toxicology, School of Public Health, Jilin University, 1163 Xin Min Street, Chaoyang District, Changchun 130021, PR China
| | - Yi-Mei Wang
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Jing Zhao
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Jun Zhao
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Zeng-Ming Zhao
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Ting-Fen Zhang
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Jun He
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China
| | - Shu-Ping Ren
- Department of Toxicology, School of Public Health, Jilin University, 1163 Xin Min Street, Chaoyang District, Changchun 130021, PR China
| | - Shuang-Qing Peng
- Evaluation and Research Center for Toxicology, Institute of Disease Control and Prevention, Academy of Military Medical Sciences, 20 Dongdajie Street, Fengtai District, Beijing 100071, PR China.
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16
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Metallothionein prevents intermittent hypoxia-induced cardiac endoplasmic reticulum stress and cell death likely via activation of Akt signaling pathway in mice. Toxicol Lett 2014; 227:113-23. [PMID: 24680926 DOI: 10.1016/j.toxlet.2014.03.011] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2013] [Revised: 03/17/2014] [Accepted: 03/17/2014] [Indexed: 12/22/2022]
Abstract
Endoplasmic reticulum (ER) stress, an adaptive response normally, causes apoptotic cell death under pathological conditions. Cardiac ER stress and associated cell death involve in the inflammatory responses that often cause cardiac remodeling and dysfunction. Here we examined whether chronic intermittent hypoxia (IH) induces cardiac ER stress and associated cell death along with inflammatory response and if so, whether these effects can be affected by transgenic overexpression or deletion of metallothionein gene (MT-TG or MT-KO). IH exposures for 3 days to 4 weeks significantly increased cardiac ER stress and apoptosis, shown by the increased expression of GRP78, ATF6 and CHOP, the activation of caspase-12 and capase-3, and the decreased Bcl2/Bax expression ratio, predominantly in the 3rd week of IH exposures. These effects were significantly exacerbated in MT-KO mice, but completely prevented in MT-TG mice. In vitro mechanistic study with H9c2 cardiac and primary neonatal cardiomyocytes showed that MT protection from ER stress-induced apoptosis was mediated by up-regulating Akt phosphorylation since inhibition of Akt phosphorylation abolished MT's protection MT from ER stress and apoptosis. These findings suggest that chronic IH is able to induce cardiac ER stress, cell death and inflammation can be prevented by MT, probably via up-regulation of Akt function.
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17
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Hernández JS, Barreto-Torres G, Kuznetsov AV, Khuchua Z, Javadov S. Crosstalk between AMPK activation and angiotensin II-induced hypertrophy in cardiomyocytes: the role of mitochondria. J Cell Mol Med 2014; 18:709-20. [PMID: 24444314 PMCID: PMC3981893 DOI: 10.1111/jcmm.12220] [Citation(s) in RCA: 75] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2013] [Accepted: 11/28/2013] [Indexed: 12/25/2022] Open
Abstract
AMP-kinase (AMPK) activation reduces cardiac hypertrophy, although underlying molecular mechanisms remain unclear. In this study, we elucidated the anti-hypertrophic action of metformin, specifically, the role of the AMPK/eNOS/p53 pathway. H9c2 rat cardiomyocytes were treated with angiotensin II (AngII) for 24 hrs in the presence or absence of metformin (AMPK agonist), losartan [AngII type 1 receptor (AT1R) blocker], Nω-nitro-L-arginine methyl ester (L-NAME, pan-NOS inhibitor), splitomicin (SIRT1 inhibitor) or pifithrin-α (p53 inhibitor). Results showed that treatment with metformin significantly attenuated AngII-induced cell hypertrophy and death. Metformin attenuated AngII-induced activation (cleavage) of caspase 3, Bcl-2 down-regulation and p53 up-regulation. It also reduced AngII-induced AT1R up-regulation by 30% (P < 0.05) and enhanced AMPK phosphorylation by 99% (P < 0.01) and P-eNOS levels by 3.3-fold (P < 0.01). Likewise, losartan reduced AT1R up-regulation and enhanced AMPK phosphorylation by 54% (P < 0.05). The AMPK inhibitor, compound C, prevented AT1R down-regulation, indicating that metformin mediated its effects via AMPK activation. Beneficial effects of metformin and losartan converged on mitochondria that demonstrated high membrane potential (Δψm) and low permeability transition pore opening. Thus, this study demonstrates that the anti-hypertrophic effects of metformin are associated with AMPK-induced AT1R down-regulation and prevention of mitochondrial dysfunction through the SIRT1/eNOS/p53 pathway.
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Affiliation(s)
- Jessica Soto Hernández
- Department of Physiology, School of Medicine, University of Puerto Rico, San Juan, PR, USA
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18
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Chen Z, Shentu TP, Wen L, Johnson DA, Shyy JYJ. Regulation of SIRT1 by oxidative stress-responsive miRNAs and a systematic approach to identify its role in the endothelium. Antioxid Redox Signal 2013; 19:1522-38. [PMID: 23477488 PMCID: PMC3797452 DOI: 10.1089/ars.2012.4803] [Citation(s) in RCA: 68] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Abstract
SIGNIFICANCE Oxidative stress is a common denominator of various risk factors contributing to endothelial dysfunction and vascular diseases. Accumulated evidence suggests that sirtuin 1 (SIRT1) expression and/or activity is impaired by supraphysiological levels of oxidative stress, which in turn disrupts endothelial homeostasis. RECENT ADVANCES Several microRNAs (miRNAs) are induced by oxidative stress and termed as oxidative stress-responsive miRNAs. They may play a role linking the imbalanced redox state with dysregulated SIRT1. CRITICAL ISSUES This review summarizes recent findings on oxidative stress-responsive miRNAs and their involvement in SIRT1 regulation. Because of the unique characteristics of miRNAs, research in this new area requires an integrative approach that combines bioinformatics and experimental validation. Thus, a research strategy is discussed to identify the SIRT1-regulating miRNAs under oxidative stress and their functional outcomes in relation to endothelial dysfunction. Additionally, the miRNAs implicated in vascular diseases such as atherosclerosis and abdominal aortic aneurysms are discussed along with the translational potential and challenges of using miRNAs and its analogs as therapeutic agents. FUTURE DIRECTIONS Although at its infancy, research on oxidative stress-responsive miRNAs and their regulation of SIRT1 may provide new insights in understanding vascular disorders. Moreover, systematic approaches integrating in silico, in vitro, and in vivo observations can be useful tools in revealing the pathways modulating endothelial biology.
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Affiliation(s)
- Zhen Chen
- 1 Division of Biomedical Sciences, University of California , Riverside, California
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Abstract
SIGNIFICANCE Despite recent medical advances, cardiovascular disease and heart failure (HF) continue to be major health concerns, and related mortality remains high. As a result, investigation of the mechanisms involved in the development of HF continues to be an active field of study. RECENT ADVANCES The renin-angiotensin system (RAS) and its effector molecule, angiotensin (Ang) II, affect cardiac function through both systemic and local actions, and have been shown to play a major role in cardiac remodeling and dysfunction in the failing heart. Many of the downstream effects of AngII signaling are mediated by elevated levels of reactive oxygen species (ROS) and oxidative stress, which have also been implicated in the pathology of HF. CRITICAL ISSUES Inhibitors of the RAS have proven beneficial in the treatment of patients at risk for and suffering from HF, but remain only partially effective. ROS can be generated from several different sources, and the oxidative state is normally tightly regulated in the heart. How AngII increases ROS levels and causes dysregulation of the cardiac oxidative state has been the subject of considerable interest in recent years. FUTURE DIRECTIONS A better understanding of this process and the mechanisms involved should lead to the development of more effective HF therapies and improved outcomes.
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Affiliation(s)
- Daniela Zablocki
- Department of Cell Biology and Molecular Medicine, Cardiovascular Research Institute, New Jersey Medical School, University of Medicine and Dentistry of New Jersey , Newark, New Jersey
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20
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Miao X, Tang Z, Wang Y, Su G, Sun W, Wei W, Li W, Miao L, Cai L, Tan Y, Liu Q. Metallothionein prevention of arsenic trioxide-induced cardiac cell death is associated with its inhibition of mitogen-activated protein kinases activation in vitro and in vivo. Toxicol Lett 2013; 220:277-85. [PMID: 23664956 DOI: 10.1016/j.toxlet.2013.04.025] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2013] [Revised: 04/27/2013] [Accepted: 04/30/2013] [Indexed: 02/08/2023]
Abstract
Cardiotoxicity induced by arsenic trioxide has become a serious blockade of clinical applications of this effective anticancer agent. The general mechanism responsible for arsenic cardiotoxicity has been attributed to its induction of oxidative stress. Metallothionein (MT) has been extensively proven to be a potent endogenous antioxidant that protects heart against oxidative stress-induced cardiac damage. To investigate whether and how MT protects against arsenic cardiotoxicity, MT-overexpressing H9c2 (MT-H9c2) cardiac cells and transgenic (MT-TG) mice with their corresponding controls were exposed to the clinical relevant dose of arsenic trioxide. Cardiac cell apoptosis was detected by molecular indices, including the cleavage of caspase 3 and caspase 12, Bax/Bcl2 expression ratio, CHOP expression and/or confirmed by a terminal deoxynucleotidyl transferase-mediated dUTP nick end labeling assay. Arsenic trioxide dose- and time-dependently induced cardiac cell death in H9c2 cells with a significant activation of major MAPK subfamily members such as ERK1/2, JNK and p38, but not in MT-H9c2 cells. Importantly, the protective effect of MT on arsenic trioxide-induced apoptotic cell death was completely recaptured in the heart of MT-TG with a significant prevention of MAPKs activation. These results indicate that arsenic trioxide-upregulated MAPKs might play important role in arsenic trioxide-induced apoptotic cell death in cardiac cells both in vivo and in vitro, and MT's suppression of arsenic trioxide apoptotic effect was associated with the inhibition of MAPK activation. Therefore, selective elevation of cardiac MT levels with pharmacological approaches may be a potential strategy for the prevention of arsenic cardiotoxicity.
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Affiliation(s)
- Xiao Miao
- The Second Hospital of Jilin University, Changchun 130021, China
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21
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c-Abl mediates angiotensin II-induced apoptosis in podocytes. J Mol Histol 2013; 44:597-608. [PMID: 23515840 DOI: 10.1007/s10735-013-9505-8] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/25/2012] [Accepted: 03/14/2013] [Indexed: 10/27/2022]
Abstract
Angiotensin II (Ang II) has been reported to cause podocyte apoptosis in rats both in vivo and in vitro studies. However, the underlying mechanisms are poorly understood. In the present study, we investigated the role of the nonreceptor tyrosine kinase c-Abl in Ang II-induced podocyte apoptosis. Male Sprague-Dawley rats in groups of 12 were administered either Ang II (400 kg/kg/min) or Ang II + STI-571 (50 mg/kg/day) by osmotic minipumps. In addition, 12 rats-receiving normal saline served as the control. Glomeruli c-Abl expression was carried out by real time PCR, Western blotting and immunolabeled, and occurrence of apoptosis was carried out by TUNEL staining and transmission electron microscopic analysis. In vitro studies, conditionally immortalized mouse podocytes were treated with Ang II (10(-9)-10(-6) M) in the presence or absence of either c-Abl inhibitor, Src-I1, specific c-Abl siRNA, or c-Abl plasmid alone. Quantification of podocyte c-Abl expression and c-Abl phosphorylation at Y245 and Y412 was carried out by real time PCR, Western blotting and immunofluorescence imaging. The nuclear c-Abl and p53 were quantified by co-immunoprecipitation and Western blotting studies. Podocyte apoptosis was analysed by flow cytometry and Hoechst-33342 staining. c-Abl expression was demonstrated in rat kidney podocytes in vivo and cultured mouse podocytes in vitro. Ang II-receiving rats displayed enhanced podocyte c-Abl expression. And Ang II significantly stimulated c-Abl expression in cultured podocytes. Furthermore Ang II upregulated podocyte c-Abl phosphorylation at Y245 and Y412. Ang II also induced an increase of nuclear p53 protein and nuclear c-Abl-p53 complexes in podocytes and podocyte apoptosis. Down-regulation of c-Abl expression by c-Abl inhibitor (Src-I1) as well as specific siRNA inhibited Ang II-induced podocyte apoptosis; conversely, podoctyes transfected with c-Abl plasmid displayed enhanced apoptosis. These findings indicate that c-Abl may mediates Ang II-induced podocyte apoptosis, and inhibition of c-Abl expression can protect podocytes from Ang II-induced injury.
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Babula P, Masarik M, Adam V, Eckschlager T, Stiborova M, Trnkova L, Skutkova H, Provaznik I, Hubalek J, Kizek R. Mammalian metallothioneins: properties and functions. Metallomics 2012; 4:739-50. [PMID: 22791193 DOI: 10.1039/c2mt20081c] [Citation(s) in RCA: 179] [Impact Index Per Article: 14.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
Metallothioneins (MT) are a family of ubiquitous proteins, whose role is still discussed in numerous papers, but their affinity to some metal ions is undisputable. These cysteine-rich proteins are connected with antioxidant activity and protective effects on biomolecules against free radicals, especially reactive oxygen species. In this review, the connection between zinc(II) ions, reactive oxygen species, heavy metal ions and metallothioneins is demonstrated with respect to effect of these proteins on cell proliferation and a possible negative role in resistance to heavy metal-based and non-heavy metal-based drugs.
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Affiliation(s)
- Petr Babula
- Central European Institute of Technology, Brno University of Technology, Technicka 3058/10, CZ-616 00 Brno, Czech Republic
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Abstract
Evidence for the association of DNA damage with cardiovascular disease has been obtained from in vitro cell culture models, experimental cardiovascular disease and analysis of samples obtained from humans with disease. There is general acceptance that several factors associated with the risk of developing cardiovascular disease cause oxidative damage to DNA in cell culture models with both nuclear and mitochondrial DNA as targets. Moreover, evidence obtained over the past 10 years points to a possible mechanistic role for DNA damage in experimental atherosclerosis culminating in recent studies challenging the assumption that DNA damage is merely a biomarker of the disease process. This kind of mechanistic insight provides a renewed impetus for further studies in this area.
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Affiliation(s)
- Qudsia Malik
- Department of Cardiovascular Sciences, University of Leicester, Glenfield Hospital , Leicester , UK
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Yu XY, Geng YJ, Liang JL, Lin QX, Lin SG, Zhang S, Li Y. High levels of glucose induce apoptosis in cardiomyocyte via epigenetic regulation of the insulin-like growth factor receptor. Exp Cell Res 2010; 316:2903-9. [PMID: 20633551 DOI: 10.1016/j.yexcr.2010.07.004] [Citation(s) in RCA: 47] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/26/2010] [Revised: 07/02/2010] [Accepted: 07/06/2010] [Indexed: 12/28/2022]
Abstract
Diabetic hyperglycemia result in cardiovascular complications, but the mechanisms by which high levels of glucose (HG) cause diabetic cardiomyopathy are not known. We investigate whether HG-induced repression of insulin-like growth factor 1 receptor (IGF-1R) mediated by epigenetic modifications is one potential mechanism. We found that HG resulted in decreased IGF-1 receptor (IGF-1R) mRNA levels, and IGF-1R protein when compared with H9C2 rat cardiomyocyte cells incubated in normal glucose. HG also induced apoptosis of H9C2 cells. The effects of HG on reduced expression of IGF-1R and increased apoptosis were blocked by silencing p53 with small interference RNA but not by non-targeting scrambled siRNA. Moreover, HG negatively regulated IGF-1R promoter activity as determined by ChIP analysis, which was dependent on p53 since siRNA-p53 attenuated the effects of HG on IGF-1R promoter activity. HG also increased the association of p53 with histone deacetylase 1 (HDAC1), and decreased the association of acetylated histone-4 with the IGF-1R promoter. Furthermore, HDAC inhibitor relieved the repression of IGF-1R following HG state. These results suggest that HG-induced repression of IGF-1R is mediated by the association of p53 with the IGF-1R promoter, and by the subsequent enhanced recruitment of chromatin-modifying proteins, such as HDAC1, to the IGF-1R promoter-p53 complex. In conclusion, our data demonstrate that HG decreases expression of IGF-1R and decreases the association of acetylated histone-4 with the IGF-1R promoter. These studies may help delineate the complex pathways regulating diabetic cardiomyopathy, and have implications for the development of novel therapeutic strategies to prevent diabetic cardiomyopathy by epigenetic regulation of IGF-1R.
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Affiliation(s)
- Xi-Yong Yu
- Medical Research Center, Guangdong General Hospital, Guangdong Provincial Cardiovascular Institute, Guangdong Academy of Medical Sciences, Guangzhou, Guangdong, P.R. China.
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