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Zheng J, Wu Q, Li Q, Tang M, He J, Qiu Z, Xie L, Chen L. Benefits of sacubitril/valsartan use in patients with chronic heart failure after cardiac valve surgery: a single-center retrospective study. J Cardiothorac Surg 2023; 18:138. [PMID: 37041595 PMCID: PMC10091567 DOI: 10.1186/s13019-023-02252-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2022] [Accepted: 04/03/2023] [Indexed: 04/13/2023] Open
Abstract
OBJECTIVES To evaluate the efficacy of sacubitril/valsartan for the treatment of patients with chronic heart failure (CHF) after cardiac valve surgery (CVS). METHODS Data were collected from 259 patients who underwent CVS due to valvular heart disease and were admitted to the hospital with CHF from January 2018 to December 2020. The patients were divided into Group A (treatment with sacubitril/valsartan) and Group B (treatment without sacubitril/valsartan). The duration of treatment and follow-up was 6 months. The two groups' prior and clinical characteristics, post-treatment data, mortality, and follow-up data were analysed. RESULTS The effective rate of Group A was higher than that of Group B (82.56% versus 65.52%, P < 0.05). The left ventricular ejection fraction (LVEF, %) was improved in both groups. The final value minus the initial value was (11.14 ± 10.16 versus 7.15 ± 11.18, P = 0.004). The left ventricular end-diastolic/-systolic diameter (LVEDD/LVESD, mm) in Group A decreased more than in Group B. The final value minus the initial value was (-3.58 ± 9.21 versus - 0.27 ± 14.44, P = 0.026; -4.21 ± 8.15 versus - 1.14 ± 12.12, P = 0.016, respectively). Both groups decreased the N-terminal prohormone of B-type natriuretic peptide (NT-proBNP, pg/ml). The final value minus initial value was [-902.0(-2226.0, -269.5) versus - 535.0(-1738, -7.0), P = 0.029]. The systolic and diastolic blood pressure (SBP/DBP, mmHg) in Group A decreased more than in Group B. The final value minus the initial value was (-13.13 ± 23.98 versus - 1.81 ± 10.89, P < 0.001; -8.28 ± 17.79 versus - 2.37 ± 11.41, P = 0.005, respectively). Liver and renal insufficiency, hyperkalaemia, symptomatic hypotension, angioedema, and acute heart failure had no statistical differences between the two groups. CONCLUSIONS Sacubitril/valsartan can effectively improve the cardiac function of patients with CHF after CVS by increasing LVEF and reducing LVEDD, LVESD, NT-proBNP, and BP, with good safety.
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Affiliation(s)
- Jian Zheng
- Department of Pharmacy, The First Affiliated Hospital of Fujian Medical University, Fuzhou, Fujian, P. R. China
| | - Qingsong Wu
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Xinquan Road 29, 350001, Fuzhou, Fujian, P. R. China
- Key Laboratory of Cardio-Thoracic SurgeryFujian Medical University), Fujian Province University, Fujian Medical University), Fuzhou, Fujian, P. R. China
| | - Qianzhen Li
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Xinquan Road 29, 350001, Fuzhou, Fujian, P. R. China
| | - Mirong Tang
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Xinquan Road 29, 350001, Fuzhou, Fujian, P. R. China
| | - Jian He
- Fujian Medical University, Fuzhou, Fujian, P. R. China
| | - Zhihuang Qiu
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Xinquan Road 29, 350001, Fuzhou, Fujian, P. R. China
- Key Laboratory of Cardio-Thoracic SurgeryFujian Medical University), Fujian Province University, Fujian Medical University), Fuzhou, Fujian, P. R. China
| | - Linfeng Xie
- Fujian Medical University, Fuzhou, Fujian, P. R. China
| | - Liangwan Chen
- Department of Cardiovascular Surgery, Union Hospital, Fujian Medical University, Xinquan Road 29, 350001, Fuzhou, Fujian, P. R. China.
- Key Laboratory of Cardio-Thoracic SurgeryFujian Medical University), Fujian Province University, Fujian Medical University), Fuzhou, Fujian, P. R. China.
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Ramprasath T, Freddy AJ, Velmurugan G, Tomar D, Rekha B, Suvekbala V, Ramasamy S. Context-Dependent Regulation of Nrf2/ARE Axis on Vascular Cell Function during Hyperglycemic Condition. Curr Diabetes Rev 2020; 16:797-806. [PMID: 32000646 DOI: 10.2174/1573399816666200130094512] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/25/2019] [Revised: 12/03/2019] [Accepted: 12/26/2019] [Indexed: 12/13/2022]
Abstract
Diabetes mellitus is associated with an increased risk of micro and macrovascular complications. During hyperglycemic conditions, endothelial cells and vascular smooth muscle cells are exquisitely sensitive to high glucose. This high glucose-induced sustained reactive oxygen species production leads to redox imbalance, which is associated with endothelial dysfunction and vascular wall remodeling. Nrf2, a redox-regulated transcription factor plays a key role in the antioxidant response element (ARE)-mediated expression of antioxidant genes. Although accumulating data indicate the molecular mechanisms underpinning the Nrf2 regulated redox balance, understanding the influence of the Nrf2/ARE axis during hyperglycemic condition on vascular cells is paramount. This review focuses on the context-dependent role of Nrf2/ARE signaling on vascular endothelial and smooth muscle cell function during hyperglycemic conditions. This review also highlights improving the Nrf2 system in vascular tissues, which could be a potential therapeutic strategy for vascular dysfunction.
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Affiliation(s)
- Tharmarajan Ramprasath
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Allen John Freddy
- Department of Zoology, Madras Christian College, Chennai 600 059, Tamil Nadu, India
| | - Ganesan Velmurugan
- Chemomicrobiomics Laboratory, KMCH Research Foundation, Kovai Medical Center & Hospital, Coimbatore 641 014, Tamil Nadu, India
| | - Dhanendra Tomar
- Center for Translational Medicine, Temple University, Philadelphia 19140, United States
| | - Balakrishnan Rekha
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
| | - Vemparthan Suvekbala
- Department of Biomedical Sciences & Technology, Noorul Islam Centre for Higher Education, Kumaracoil, Thucklay, Tamilnadu 629180, India
| | - Subbiah Ramasamy
- Department of Molecular Biology, School of Biological Sciences, Madurai Kamaraj University, Madurai 625021, Tamil Nadu, India
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Tian CJ, Zhen Z. Reactive Carbonyl Species: Diabetic Complication in the Heart and Lungs. Trends Endocrinol Metab 2019; 30:546-556. [PMID: 31253519 DOI: 10.1016/j.tem.2019.05.005] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/06/2019] [Revised: 05/26/2019] [Accepted: 05/28/2019] [Indexed: 12/28/2022]
Abstract
Abnormal chemical reactions in hyperglycemia alter normal metabolic processes in diabetes, which is a key process in the production of reactive carbonyls species (RCS). Increasing the concentration of RCS may result in carbonyl/oxidative stress in both the diabetic heart and lung. Ryanodine receptors (RyRs) not only play a key role in heart contraction, including rhythmic contraction and relaxation of the heart, but they are also important for controlling the airway smooth muscle. RCS modifies RyRs, resulting in RyRs dysfunction, which is involved in important mechanisms in diabetic complications. Very little is known about the mechanistic relationship between the heart and lung in diabetes. This review highlights new findings on the pathophysiological mechanisms and discusses potential approaches to treatment for these complications.
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Affiliation(s)
- Cheng-Ju Tian
- College of Rehabilitation and Sports Medicine, Jinzhou Medical University, Jinzhou, Liaoning, 121001, China.
| | - Zhong Zhen
- Guang'anmen Hospital, China Academy of Chinese Medical Sciences, Beijing 100053, China.
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4
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Shen Z, Chen Q, Jin T, Wang M, Ying H, Lu J, Wang M, Zhang W, Qiu F, Jin C, Zhao Y, Fu G. Theaflavin 3,3'-digallate reverses the downregulation of connexin 43 and autophagy induced by high glucose via AMPK activation in cardiomyocytes. J Cell Physiol 2019; 234:17999-18016. [PMID: 30847932 DOI: 10.1002/jcp.28432] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2018] [Revised: 02/03/2019] [Accepted: 02/14/2019] [Indexed: 12/16/2022]
Abstract
Theaflavin 3,3'-digallate (TF3), is reported to protect cardiomyocytes from lipotoxicity and reperfusion injury. However, the role of TF3 in the protection of high-glucose injury is still poorly understood. This study investigated the protective effects of TF3 on gap junctions and autophagy in neonatal cardiomyocytes (NRCMs). NRCMs preincubated with high glucose were coincubated with TF3. The expression of connexins and autophagy-related proteins was determined. The functioning of gap-junctional intercellular communication (GJIC) was measured by a dye transfer assay. Adenosine monophosphate-activated protein kinase (AMPK) activity was determined by western blot. Moreover, AMPK was activated with aminoimidazole-4-carboxamide-1-β-d-ribofuranoside (AICAR) or inhibited by AMPKα small interfering RNA (siRNA) to explore the role of AMPK in the modulation of connexin 43 (Cx43) and autophagy. Meanwhile, autophagy was activated or blocked to observe the change in Cx43 expression. It was found that the protein expression of Cx43 and autophagy-related proteins was increased in a TF3 dose- and time-dependent manner under high glucose. TF3 also recovered the reduced GJIC function induced by high glucose concentrations. TF3 activated phosphorylated AMPK in a time-dependent way. AMPKα siRNA abrogated the protection of TF3, while AICAR showed similar results compared to the TF3 treatment. Meanwhile, autophagy activation caused decreased Cx43, while cotreatment with baf A1 enhanced Cx43 expression further compared with the TF3 treatment alone under high glucose. We concluded that TF3 partly reversed the inhibition of Cx43 expression and autophagy induced by high glucose in NRCMs, partly by restoring AMPK activity. Inhibition of autophagy might be protective by preserving Cx43 expression in NRCMs stimulated by high glucose.
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Affiliation(s)
- Zhida Shen
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Qi Chen
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Tingting Jin
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Meihui Wang
- Department of Cardiology Basic Research, Biomedical Research Center, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Hangying Ying
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Jiangting Lu
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Ming Wang
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Wenbin Zhang
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Fuyu Qiu
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Chongying Jin
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Yanbo Zhao
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
| | - Guosheng Fu
- Department of Cardiology, Sir Run Run Shaw Hospital, Zhejiang University School of Medicine, Hangzhou, Zhejiang, China
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5
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Matecki S, Dridi H, Jung B, Saint N, Reiken SR, Scheuermann V, Mrozek S, Santulli G, Umanskaya A, Petrof BJ, Jaber S, Marks AR, Lacampagne A. Leaky ryanodine receptors contribute to diaphragmatic weakness during mechanical ventilation. Proc Natl Acad Sci U S A 2016; 113:9069-74. [PMID: 27457930 PMCID: PMC4987795 DOI: 10.1073/pnas.1609707113] [Citation(s) in RCA: 65] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Ventilator-induced diaphragmatic dysfunction (VIDD) refers to the diaphragm muscle weakness that occurs following prolonged controlled mechanical ventilation (MV). The presence of VIDD impedes recovery from respiratory failure. However, the pathophysiological mechanisms accounting for VIDD are still not fully understood. Here, we show in human subjects and a mouse model of VIDD that MV is associated with rapid remodeling of the sarcoplasmic reticulum (SR) Ca(2+) release channel/ryanodine receptor (RyR1) in the diaphragm. The RyR1 macromolecular complex was oxidized, S-nitrosylated, Ser-2844 phosphorylated, and depleted of the stabilizing subunit calstabin1, following MV. These posttranslational modifications of RyR1 were mediated by both oxidative stress mediated by MV and stimulation of adrenergic signaling resulting from the anesthesia. We demonstrate in the murine model that such abnormal resting SR Ca(2+) leak resulted in reduced contractile function and muscle fiber atrophy for longer duration of MV. Treatment with β-adrenergic antagonists or with S107, a small molecule drug that stabilizes the RyR1-calstabin1 interaction, prevented VIDD. Diaphragmatic dysfunction is common in MV patients and is a major cause of failure to wean patients from ventilator support. This study provides the first evidence to our knowledge of RyR1 alterations as a proximal mechanism underlying VIDD (i.e., loss of function, muscle atrophy) and identifies RyR1 as a potential target for therapeutic intervention.
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Affiliation(s)
- Stefan Matecki
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France
| | - Haikel Dridi
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France
| | - Boris Jung
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France; Department of Anesthesiology and Critical Care Medicine, St. Eloi Teaching Hospital, 34295 Montpellier, France
| | - Nathalie Saint
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France
| | - Steven R Reiken
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032; The Clyde and Helen Wu Center for Molecular Cardiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032; Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032
| | - Valérie Scheuermann
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France
| | - Ségolène Mrozek
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France
| | - Gaetano Santulli
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032; The Clyde and Helen Wu Center for Molecular Cardiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032; Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032
| | - Alisa Umanskaya
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032; The Clyde and Helen Wu Center for Molecular Cardiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032; Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032
| | - Basil J Petrof
- Meakins-Christie Laboratories, McGill University and McGill University Hospital Research Institute, Montreal, QC H2X 2P2, Canada
| | - Samir Jaber
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France; Department of Anesthesiology and Critical Care Medicine, St. Eloi Teaching Hospital, 34295 Montpellier, France
| | - Andrew R Marks
- Department of Physiology and Cellular Biophysics, College of Physicians and Surgeons, Columbia University, New York, NY 10032; The Clyde and Helen Wu Center for Molecular Cardiology, College of Physicians and Surgeons, Columbia University, New York, NY 10032; Department of Medicine, College of Physicians and Surgeons, Columbia University, New York, NY 10032;
| | - Alain Lacampagne
- Inserm U1046, CNRS UMR 91214, Université de Montpellier, Centre Hospitalier Regional Universitaire de Montpellier, 34295 Montpellier, France;
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Abstract
SIGNIFICANCE Selenoproteins employ selenium to supplement the chemistry available through the common 20 amino acids. These powerful enzymes are affiliated with redox biology, often in connection with the detection, management, and signaling of oxidative stress. Among them, membrane-bound selenoproteins play prominent roles in signaling pathways, Ca(2+) regulation, membrane complexes integrity, and biosynthesis of lipophilic molecules. RECENT ADVANCES The number of selenoproteins whose physiological roles, protein partners, expression, evolution, and biosynthesis are characterized is steadily increasing, thus offering a more nuanced view of this specialized family. This review focuses on human membrane selenoproteins, particularly the five least characterized ones: selenoproteins I, K, N, S, and T. CRITICAL ISSUES Membrane-bound selenoproteins are the least understood, as it is challenging to provide the membrane-like environment required for their biochemical and biophysical characterization. Hence, their studies rely mostly on biological rather than structural and biochemical assays. Another aspect that has not received much attention is the particular role that their membrane association plays in their physiological function. FUTURE DIRECTIONS Findings cited in this review show that it is possible to infer the structure and the membrane-binding mode of these lesser-studied selenoproteins and design experiments to examine the role of the rare amino acid selenocysteine.
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Affiliation(s)
- Jun Liu
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware
| | - Sharon Rozovsky
- Department of Chemistry and Biochemistry, University of Delaware , Newark, Delaware
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Fuentes-Antrás J, Picatoste B, Gómez-Hernández A, Egido J, Tuñón J, Lorenzo Ó. Updating experimental models of diabetic cardiomyopathy. J Diabetes Res 2015; 2015:656795. [PMID: 25973429 PMCID: PMC4417999 DOI: 10.1155/2015/656795] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/14/2015] [Revised: 03/26/2015] [Accepted: 03/29/2015] [Indexed: 11/17/2022] Open
Abstract
Diabetic cardiomyopathy entails a serious cardiac dysfunction induced by alterations in structure and contractility of the myocardium. This pathology is initiated by changes in energy substrates and occurs in the absence of atherothrombosis, hypertension, or other cardiomyopathies. Inflammation, hypertrophy, fibrosis, steatosis, and apoptosis in the myocardium have been studied in numerous diabetic experimental models in animals, mostly rodents. Type I and type II diabetes were induced by genetic manipulation, pancreatic toxins, and fat and sweet diets, and animals recapitulate the main features of human diabetes and related cardiomyopathy. In this review we update and discuss the main experimental models of diabetic cardiomyopathy, analysing the associated metabolic, structural, and functional abnormalities, and including current tools for detection of these responses. Also, novel experimental models based on genetic modifications of specific related genes have been discussed. The study of specific pathways or factors responsible for cardiac failures may be useful to design new pharmacological strategies for diabetic patients.
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Affiliation(s)
- J. Fuentes-Antrás
- IIS-Fundación Jiménez Díaz, Autónoma University, 28040 Madrid, Spain
| | - B. Picatoste
- IIS-Fundación Jiménez Díaz, Autónoma University, 28040 Madrid, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) Network, 28040 Madrid, Spain
| | - A. Gómez-Hernández
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) Network, 28040 Madrid, Spain
- Biochemistry and Molecular Biology Department, School of Pharmacy, Complutense University of Madrid, 28040 Madrid, Spain
| | - J. Egido
- IIS-Fundación Jiménez Díaz, Autónoma University, 28040 Madrid, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) Network, 28040 Madrid, Spain
| | - J. Tuñón
- IIS-Fundación Jiménez Díaz, Autónoma University, 28040 Madrid, Spain
| | - Ó. Lorenzo
- IIS-Fundación Jiménez Díaz, Autónoma University, 28040 Madrid, Spain
- Spanish Biomedical Research Centre in Diabetes and Associated Metabolic Disorders (CIBERDEM) Network, 28040 Madrid, Spain
- *Ó. Lorenzo:
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Donoso P, Finkelstein JP, Montecinos L, Said M, Sánchez G, Vittone L, Bull R. Stimulation of NOX2 in isolated hearts reversibly sensitizes RyR2 channels to activation by cytoplasmic calcium. J Mol Cell Cardiol 2014; 68:38-46. [PMID: 24417961 DOI: 10.1016/j.yjmcc.2013.12.028] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/29/2013] [Revised: 11/25/2013] [Accepted: 12/31/2013] [Indexed: 01/25/2023]
Abstract
The response of ryanodine receptor (RyR) channels to cytoplasmic free calcium concentration ([Ca(2+)]) is redox sensitive. Here, we report the effects of a mild oxidative stress on cardiac RyR (RyR2) channels in Langendorff perfused rat hearts. Single RyR2 channels from control ventricles displayed the same three responses to Ca(2+) reported in other mammalian tissues, characterized by low, moderate, or high maximal activation. A single episode of 5 min of global ischemia, followed by 1 min of reperfusion, enhanced 2.3-fold the activity of NOX2 compared to controls and changed the frequency distribution of the different responses of RyR2 channels to calcium, favoring the more active ones: high activity response increased and low activity response decreased with respect to controls. This change was fully prevented by perfusion with apocynin or VAS 2870 before ischemia and totally reversed by the extension of the reperfusion period to 15 min. In vitro activation of NOX2 in control SR vesicles mimicked the effect of the ischemia/reperfusion episode on the frequencies of emergence of single RyR2 channel responses to [Ca(2+)] and increased 2.2-fold the rate of calcium release in Ca(2+)-loaded SR vesicles. In vitro changes were reversed at the single channel level by DTT and in isolated SR vesicles by glutaredoxin. Our results indicate that in whole hearts a mild oxidative stress enhances the response of cardiac RyR2 channels to calcium via NOX2 activation, probably by S-glutathionylation of RyR2 protein. This change is transitory and fully reversible, suggesting a possible role of redox modification in the physiological response of cardiac RyR2 to cellular calcium influx.
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Affiliation(s)
- Paulina Donoso
- Programa de Fisiología y Biofísica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile
| | - José Pablo Finkelstein
- Programa de Fisiología y Biofísica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile
| | - Luis Montecinos
- Programa de Fisiología y Biofísica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile
| | - Matilde Said
- Centro de Investigaciones Cardiovasculares, Universidad Nacional de La Plata, Argentina
| | - Gina Sánchez
- Programa de Fisiopatología, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile
| | - Leticia Vittone
- Centro de Investigaciones Cardiovasculares, Universidad Nacional de La Plata, Argentina
| | - Ricardo Bull
- Programa de Fisiología y Biofísica, Instituto de Ciencias Biomédicas, Facultad de Medicina, Universidad de Chile, Chile.
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9
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Yu X, Zhang Q, Cui W, Zeng Z, Yang W, Zhang C, Zhao H, Gao W, Wang X, Luo D. Low molecular weight fucoidan alleviates cardiac dysfunction in diabetic Goto-Kakizaki rats by reducing oxidative stress and cardiomyocyte apoptosis. J Diabetes Res 2014; 2014:420929. [PMID: 25525607 PMCID: PMC4267220 DOI: 10.1155/2014/420929] [Citation(s) in RCA: 29] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/27/2014] [Accepted: 10/29/2014] [Indexed: 01/09/2023] Open
Abstract
Diabetic cardiomyopathy (DCM) is characterized by cardiac dysfunction and cardiomyocyte apoptosis. Oxidative stress is suggested to be the major contributor to the development of DCM. This study was intended to evaluate the protective effect of low molecular weight fucoidan (LMWF) against cardiac dysfunction in diabetic rats. Type 2 diabetic goto-kakizaki rats were untreated or treated with LMWF (50 and 100 mg/kg/day) for three months. The establishment of DCM model and the effects of LMWF on cardiac function were evaluated by echocardiography and isolated heart perfusion. Ventricle staining with H-E or Sirius Red was performed to investigate the structural changes in myocardium. Functional evaluation demonstrated that LMWF has a beneficial effect on DCM by enhancing myocardial contractility and mitigating cardiac fibrosis. Additionally, LMWF exerted significant inhibitory effects on the reactive oxygen species production and myocyte apoptosis in diabetic hearts. The depressed activity of superoxide dismutase in diabetic heart was also improved by intervention with LMWF. Moreover, LMWF robustly inhibited the enhanced expression of protein kinase C β, an important contributor to oxidative stress, in diabetic heart and high glucose-treated cardiomyocytes. In conclusion, LMWF possesses a protective effect against DCM through ameliorations of PKCβ-mediated oxidative stress and subsequent cardiomyocyte apoptosis in diabetes.
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MESH Headings
- Animals
- Apoptosis/drug effects
- Cell Line
- Collagen/metabolism
- Diabetes Mellitus, Type 2/diagnosis
- Diabetes Mellitus, Type 2/drug therapy
- Diabetes Mellitus, Type 2/metabolism
- Diabetic Cardiomyopathies/diagnosis
- Diabetic Cardiomyopathies/metabolism
- Diabetic Cardiomyopathies/physiopathology
- Diabetic Cardiomyopathies/prevention & control
- Disease Models, Animal
- Fibrosis
- Male
- Molecular Weight
- Myocardial Contraction/drug effects
- Myocytes, Cardiac/drug effects
- Myocytes, Cardiac/metabolism
- Myocytes, Cardiac/pathology
- Oxidative Stress/drug effects
- Polysaccharides/pharmacology
- Protein Kinase C beta/metabolism
- Rats, Wistar
- Signal Transduction/drug effects
- Superoxide Dismutase/metabolism
- Ventricular Dysfunction, Left/diagnosis
- Ventricular Dysfunction, Left/metabolism
- Ventricular Dysfunction, Left/physiopathology
- Ventricular Dysfunction, Left/prevention & control
- Ventricular Function, Left/drug effects
- Ventricular Remodeling/drug effects
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Affiliation(s)
- Xinfeng Yu
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Quanbin Zhang
- Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Wentong Cui
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Zheng Zeng
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Wenzhe Yang
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Chao Zhang
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Hongwei Zhao
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
| | - Weidong Gao
- Department of Anesthesiology and Critical Care Medicine, Johns Hopkins University School of Medicine, Baltimore, MD 21287, USA
| | - Xiaomin Wang
- Department of Physiology, Capital Medical University, Beijing 100069, China
| | - Dali Luo
- Department of Pharmacology, School of Chemical Biology & Pharmaceutical Sciences, Capital Medical University, Youanmenwai Street, No. 10 Xitoutiao, Fengtai District, Beijing 100069, China
- *Dali Luo:
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10
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Roe ND, He EY, Wu Z, Ren J. Folic acid reverses nitric oxide synthase uncoupling and prevents cardiac dysfunction in insulin resistance: role of Ca2+/calmodulin-activated protein kinase II. Free Radic Biol Med 2013; 65:234-243. [PMID: 23820268 PMCID: PMC3859865 DOI: 10.1016/j.freeradbiomed.2013.06.042] [Citation(s) in RCA: 26] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/17/2013] [Revised: 05/18/2013] [Accepted: 06/24/2013] [Indexed: 12/13/2022]
Abstract
Nitric oxide synthase (NOS) may be uncoupled to produce superoxide rather than nitric oxide (NO) under pathological conditions such as diabetes mellitus and insulin resistance, leading to cardiac contractile anomalies. Nonetheless, the role of NOS uncoupling in insulin resistance-induced cardiac dysfunction remains elusive. Given that folic acid may produce beneficial effects for cardiac insufficiency partially through its NOS recoupling capacity, this study was designed to evaluate the effect of folic acid on insulin resistance-induced cardiac contractile dysfunction in a sucrose-induced insulin resistance model. Mice were fed a sucrose or starch diet for 8 weeks before administration of folic acid in drinking water for an additional 4 weeks. Cardiomyocyte contractile and Ca(2+) transient properties were evaluated and myocardial function was assessed using echocardiography. Our results revealed whole body insulin resistance after sucrose feeding associated with diminished NO production, elevated peroxynitrite (ONOO(-)) levels, and impaired echocardiographic and cardiomyocyte function along with a leaky ryanodine receptor (RYR) and intracellular Ca(2+) handling derangement. Western blot analysis showed that insulin resistance significantly promoted Ca(2+)/calmodulin-dependent protein kinase II (CaMKII) phosphorylation, which might be responsible for the leaky RYR and cardiac mechanical dysfunction. NOS recoupling using folic acid reversed insulin resistance-induced changes in NO and ONOO(-), CaMKII phosphorylation, and cardiac mechanical abnormalities. Taken together, these data demonstrated that treatment with folic acid may reverse cardiac contractile and intracellular Ca(2+) anomalies through ablation of CaMKII phosphorylation and RYR Ca(2+) leak.
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Affiliation(s)
- Nathan D Roe
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming, Laramie, WY 82071, USA
| | - Emily Y He
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming, Laramie, WY 82071, USA; Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, 710032 Xi'an, China
| | - Zhenbiao Wu
- Department of Clinical Immunology, Xijing Hospital, Fourth Military Medical University, 710032 Xi'an, China
| | - Jun Ren
- Center for Cardiovascular Research and Alternative Medicine, University of Wyoming, Laramie, WY 82071, USA.
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11
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Fauconnier J, Roberge S, Saint N, Lacampagne A. Type 2 ryanodine receptor: A novel therapeutic target in myocardial ischemia/reperfusion. Pharmacol Ther 2013; 138:323-32. [DOI: 10.1016/j.pharmthera.2013.01.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2013] [Accepted: 01/22/2013] [Indexed: 10/27/2022]
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12
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Strauss JD, Wagenknecht T. Structure of glutaraldehyde cross-linked ryanodine receptor. J Struct Biol 2013; 181:300-6. [PMID: 23333333 PMCID: PMC3587655 DOI: 10.1016/j.jsb.2013.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/20/2012] [Revised: 01/04/2013] [Accepted: 01/09/2013] [Indexed: 01/01/2023]
Abstract
The ryanodine receptor (RyR) family of calcium release channels plays a vital role in excitation-contraction coupling (ECC). Along with the dihydropyridine receptor (DHPR), calsequestrin, and several other smaller regulatory and adaptor proteins, RyRs form a large dynamic complex referred to as ECC machinery. Here we describe a simple cross-linking procedure that can be used to stabilize fragile components of the ECC machinery, for the purpose of structural elucidation by single particle cryo-electron microscopy (cryo-EM). As a model system, the complex of the FK506-binding protein (FKBP12) and RyR1 was used to test the cross-linking protocol. Glutaraldehyde fixation led to complete cross-linking of receptor-bound FKBP12 to RyR1, and also to extensive cross-linking of the four subunits comprising RyR to one another without compromising the RyR1 ultrastructure. FKBP12 cross-linked with RyR1 was visualized in 2D averages by single particle cryo-EM. Comparison of control RyR1 and cross-linked RyR1 3D reconstructions revealed minor conformational changes at the transmembrane assembly and at the cytoplasmic region. Intersubunit cross-linking enhanced [(3)H]ryanodine binding to RyR1. Based on our findings we propose that intersubunit cross-linking of RyR1 by glutaraldehyde induced RyR1 to adopt an open like conformation.
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Affiliation(s)
- Joshua D. Strauss
- Wadsworth Center, New York State Department of Health, Albany, New York 12201
- Department of Biomedical Sciences, School of Public Health, University at Albany, State University of New York, Albany, NY 12201
| | - Terence Wagenknecht
- Wadsworth Center, New York State Department of Health, Albany, New York 12201
- Department of Biomedical Sciences, School of Public Health, University at Albany, State University of New York, Albany, NY 12201
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13
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Role of oxidative stress and Ca²⁺ signaling on molecular pathways of neuropathic pain in diabetes: focus on TRP channels. Neurochem Res 2012; 37:2065-75. [PMID: 22846968 DOI: 10.1007/s11064-012-0850-x] [Citation(s) in RCA: 109] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2012] [Revised: 07/16/2012] [Accepted: 07/19/2012] [Indexed: 12/13/2022]
Abstract
Diabetes mellitus, a debilitating chronic disease, affects ~100 million people. Peripheral neuropathy is one of the most common early complications of diabetes in ~66 % of these patients. Altered Ca(2+) handling and Ca(2+) signaling were detected in a huge variety of preparations isolated from animals with experimentally induced type 1 and 2 diabetes as well as patients suffering from the disease. We reviewed the role of Ca(2+) signaling through cation channels and oxidative stress on diabetic neuropathic pain in sensory neurons. The pathogenesis of diabetic neuropathy involves the polyol pathway, advanced glycation end products, oxidative stress, protein kinase C activation, neurotrophism, and hypoxia. Experimental studies with respect to oxidative stress and Ca(2+) signaling, inhibitor roles of antioxidants in diabetic neuropathic pain are also summarized in the review. We hypothesize that deficits in insulin, triggers alterations of sensory neurone phenotype that are critical for the development of abnormal Ca(2+) homeostasis and oxidative stress and associated mitochondrial dysfunction. The transient receptor potential channels are a large family of proteins with six main subfamilies. The sheer number of different TRPs with distinct functions supports the statement that these channels are involved in a wide range of processes ranging in diabetic neuropathic pain and it seems that the TRPC, TRPM and TRPV groups are mostly responsible from diabetic neuropathic pain. In conclusion, the accumulating evidence implicating Ca(2+) dysregulation and over production of oxidative stress products in diabetic neuropathic pains, along with recent advances in understanding of genetic variations in cation channels such as TRP channels, makes modulation of neuronal Ca(2+) handling an increasingly viable approach for therapeutic interventions against the painful and degenerative aspects of many diabetic neuropathies.
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Maulik N, Sanchez JA. Risk factors in heart disease: therapeutic interventions. Antioxid Redox Signal 2011; 15:1765-7. [PMID: 21395498 PMCID: PMC3159102 DOI: 10.1089/ars.2011.3981] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Nilanjana Maulik
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington, Connecticut
| | - Juan A. Sanchez
- Molecular Cardiology and Angiogenesis Laboratory, Department of Surgery, University of Connecticut School of Medicine, Farmington, Connecticut
- Department of Surgery, Saint Mary's Hospital, Waterbury, Connecticut
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Tian C, Shao CH, Moore CJ, Kutty S, Walseth T, DeSouza C, Bidasee KR. Gain of function of cardiac ryanodine receptor in a rat model of type 1 diabetes. Cardiovasc Res 2011; 91:300-9. [PMID: 21421556 DOI: 10.1093/cvr/cvr076] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
AIMS Ventricular myocytes isolated from hearts of streptozotocin (STZ)-diabetic rats exhibit increased spontaneous Ca(2+) release. Studies attribute this defect to an enhancement in activity of type 2 ryanodine receptor (RyR2). To date, underlying reasons for RyR2 dysregulation remain undefined. This study assesses whether the responsiveness of RyR2 following stimulation by intrinsic ligands is being altered during experimental type 1 diabetes (T1D). METHODS AND RESULTS M-mode echocardiography established a cardiomyopathy in 8 weeks STZ-diabetic rats. Confocal microscopy confirmed an increase in the spontaneous Ca(2+) release in isolated ventricular myocytes. Western blots revealed no significant change in steady-state levels of the RyR2 protein. When purified to homogeneity and incorporated into planar lipid bilayers, RyR2 from STZ-diabetic rats (dRyR2) exhibited reduced current amplitude at ±35 mV. dRyR2 was also more responsive to intrinsic cytoplasmic activators Ca(2+), adenosine triphosphate, and cyclic adenosine diphosphate ribose and less responsive to the cytoplasmic deactivator Mg(2+). Threshold for the activation of RyR2 by trans (luminal) Ca(2+) was also reduced. These changes were independent of phosphorylation at Ser2808 and Ser2814. Two weeks of insulin treatment starting after 6 weeks of diabetes blunted the phenotype change, indicating that the gain of function is specific to the diabetes and not the result of STZ interacting directly with RyR2. CONCLUSION These data show, for the first time, that RyR2 is acquiring a gain-of-function phenotype independent of its phosphorylation status during T1D and provides new insights for the enhanced spontaneous Ca(2+) release in myocytes from T1D rats.
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Affiliation(s)
- Chengju Tian
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE 68198-5800, USA
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