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Oraii A, Healey JS, Kowalik K, Pandey AK, Benz AP, Wong JA, Conen D, McIntyre WF. Mineralocorticoid receptor antagonists and atrial fibrillation: a meta-analysis of clinical trials. Eur Heart J 2024; 45:756-774. [PMID: 38195054 DOI: 10.1093/eurheartj/ehad811] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 11/05/2023] [Accepted: 11/28/2023] [Indexed: 01/11/2024] Open
Abstract
BACKGROUND AND AIMS Mineralocorticoid receptor antagonists (MRAs) improve cardiovascular outcomes in a variety of settings. This study aimed to assess whether cardioprotective effects of MRAs are modified by heart failure (HF) and atrial fibrillation (AF) status and to study their impact on AF events. METHODS MEDLINE, Embase, and Cochrane Central databases were searched to 24 March 2023 for randomized controlled trials evaluating the efficacy of MRAs as compared with placebo or usual care in reducing cardiovascular outcomes and AF events in patients with or at risk for cardiovascular diseases. Random-effects models and interaction analyses were used to test for effect modification. RESULTS Meta-analysis of seven trials (20 741 participants, mean age: 65.6 years, 32% women) showed that the efficacy of MRAs, as compared with placebo, in reducing a composite of cardiovascular death or HF hospitalization remains consistent across patients with HF [risk ratio = 0.81; 95% confidence interval (CI): 0.67-0.98] and without HF (risk ratio = 0.84; 95% CI: 0.75-0.93; interaction P = .77). Among patients with HF, MRAs reduced cardiovascular death or HF hospitalization in patients with AF (hazard ratio = 0.95; 95% CI: 0.54-1.66) to a similar extent as in those without AF (hazard ratio = 0.82; 95% CI: 0.63-1.07; interaction P = .65). Pooled data from 20 trials (21 791 participants, mean age: 65.2 years, 31.3% women) showed that MRAs reduce AF events (risk ratio = 0.76; 95% CI: 0.67-0.87) in both patients with and without prior AF. CONCLUSIONS Mineralocorticoid receptor antagonists are similarly effective in preventing cardiovascular events in patients with and without HF and most likely retain their efficacy regardless of AF status. Mineralocorticoid receptor antagonists may also be moderately effective in preventing incident or recurrent AF events.
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Affiliation(s)
- Alireza Oraii
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
| | - Jeff S Healey
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
- Division of Cardiology, Department of Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8N 3Z5, Canada
| | - Krzysztof Kowalik
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
| | - Avinash K Pandey
- Department of Medicine, University of Ottawa, Ottawa, ON, Canada
| | - Alexander P Benz
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
| | - Jorge A Wong
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
- Division of Cardiology, Department of Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8N 3Z5, Canada
| | - David Conen
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
- Division of Cardiology, Department of Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8N 3Z5, Canada
| | - William F McIntyre
- Population Health Research Institute, McMaster University, 237 Barton St East, DBVSRI C3-13A, Hamilton, ON L8L 2X2, Canada
- Division of Cardiology, Department of Medicine, McMaster University, 1200 Main Street West, Hamilton, ON L8N 3Z5, Canada
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Fujii M, Yamashita H, Kawase Y, Bessho R, Ishii Y. Additive Effects of Esaxerenone, a Nonsteroidal Mineralocorticoid Receptor Blocker, on Cardioplegic Arrest in Rat Hearts. Ann Thorac Cardiovasc Surg 2024; 30:24-00034. [PMID: 39098025 PMCID: PMC11298250 DOI: 10.5761/atcs.oa.24-00034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2024] [Accepted: 07/16/2024] [Indexed: 08/06/2024] Open
Abstract
PURPOSE Esaxerenone, a mineralocorticoid receptor blocker, attenuates global ischemia-induced myocardial damage and coronary endothelial dysfunction. This study aimed to determine whether esaxerenone exerted cardioprotective effects against cardioplegic arrest in Wistar rat hearts. METHODS Isolated male Wistar rat hearts aerobically perfused via the Langendorff method for 20 min were randomly allocated to the Control (n = 6; perfused for an additional 10 min and subjected to no treatment) or Esax (n = 6; perfused with 0.1 μmol/L esaxerenone in perfusate for 10 min before ischemia) groups. Hearts in both groups were perfused with St. Thomas' Hospital No. 2 solution (STH2) for 2 min and subjected to 28 min of global ischemia. The recovery of left ventricular developed pressure (LVDP) and total troponin T leakage were measured after reperfusion. RESULTS The final recovery of LVDP (expressed as a percentage of pre-ischemic value) in the Control and Esax groups was 50.8 ± 3.5% and 62.1 ± 5.6%, respectively (p <0.05, Esax vs. Control). The total troponin T leakage in the Control and Esax groups was 138.8 ± 18.5 ng/g heart wt and 74.3 ± 18.6 ng/g heart wt, respectively (p <0.05, Esax vs. Control). CONCLUSION The administration of esaxerenone before cardioplegic arrest enhanced the cardioprotective effect exerted by STH2.
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Affiliation(s)
- Masahiro Fujii
- Department of Cardiovascular Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Chiba, Japan
| | - Hiromasa Yamashita
- Department of Cardiovascular Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Chiba, Japan
| | - Yasuhiro Kawase
- Department of Cardiovascular Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Chiba, Japan
| | - Ryuzo Bessho
- Department of Cardiovascular Surgery, Nippon Medical School Chiba Hokusoh Hospital, Inzai, Chiba, Japan
| | - Yosuke Ishii
- Department of Cardiovascular Surgery, Nippon Medical School, Tokyo, Japan
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3
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Parksook WW, Williams GH. Aldosterone and cardiovascular diseases. Cardiovasc Res 2023; 119:28-44. [PMID: 35388416 DOI: 10.1093/cvr/cvac027] [Citation(s) in RCA: 14] [Impact Index Per Article: 14.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/27/2021] [Revised: 12/07/2021] [Accepted: 12/28/2021] [Indexed: 11/12/2022] Open
Abstract
Aldosterone's role in the kidney and its pathophysiologic actions in hypertension are well known. However, its role or that of its receptor [minieralocorticoid receptor (MR)] in other cardiovascular (CV) disease are less well described. To identify their potential roles in six CV conditions (heart failure, myocardial infarction, atrial fibrillation, stroke, atherosclerosis, and thrombosis), we assessed these associations in the following four areas: (i) mechanistic studies in rodents and humans; (ii) pre-clinical studies of MR antagonists; (iii) clinical trials of MR antagonists; and (iv) genetics. The data were acquired from an online search of the National Library of Medicine using the PubMed search engine from January 2011 through June 2021. There were 3702 publications identified with 200 publications meeting our inclusion and exclusion criteria. Data strongly supported an association between heart failure and dysregulated aldosterone/MR. This association is not surprising given aldosterone/MR's prominent role in regulating sodium/volume homeostasis. Atrial fibrillation and myocardial infarction are also associated with dysregulated aldosterone/MR, but less strongly. For the most part, the data were insufficient to determine whether there was a relationship between atherosclerosis, stroke, or thrombosis and aldosterone/MR dysregulation. This review clearly documented an expanding role for aldosterone/MR's dysregulation in CV diseases beyond hypertension. How expansive it might be is limited by the currently available data. It is anticipated that with an increased focus on aldosterone/MR's potential roles in these diseases, additional clinical and pre-clinical data will clarify these relationships, thereby, opening approaches to use modulators of aldosterone/MR's action to more precisely treat these CV conditions.
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Affiliation(s)
- Wasita W Parksook
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
- Division of Endocrinology and Metabolism, Faculty of Medicine, Chulalongkorn University, and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
- Division of General Internal Medicine, Faculty of Medicine, Chulalongkorn University, and King Chulalongkorn Memorial Hospital, Thai Red Cross Society, Bangkok, Thailand
| | - Gordon H Williams
- Division of Endocrinology, Diabetes and Hypertension, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts, USA
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Pandey AK, Bhatt DL, Cosentino F, Marx N, Rotstein O, Pitt B, Pandey A, Butler J, Verma S. Non-steroidal mineralocorticoid receptor antagonists in cardiorenal disease. Eur Heart J 2022; 43:2931-2945. [PMID: 35713973 DOI: 10.1093/eurheartj/ehac299] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/01/2022] [Revised: 05/11/2022] [Accepted: 05/24/2022] [Indexed: 12/25/2022] Open
Abstract
Despite existing treatments, patients with heart failure and chronic kidney disease (CKD) remain at high risk for adverse outcomes and progression to end-stage disease. Steroidal mineralocorticoid receptor antagonists (MRAs) such as spironolactone and eplerenone reduce mortality but remain under-prescribed due to the perceived risk of hyperkalaemia and hormonal side effects. The discovery of non-steroidal MRAs represents a major new dimension in cardiorenal disease therapy. Non-steroidal MRAs have high affinity and specificity for the mineralocorticoid receptor (MR) and differ from both steroidal agents and each other with respect to important physiochemical, pharmacodynamic, and pharmacokinetic parameters. Similar to their steroidal counterparts, they have beneficial anti-inflammatory, anti-remodelling, and anti-fibrotic properties in the kidneys, heart, and vasculature. There are several non-steroidal MRAs under development and clinical assessment; of these, only esaxerenone and finerenone are approved for treatment globally. In Japan, esaxerenone is approved for essential hypertension and has been studied in diabetic nephropathy. Compared with steroidal MRAs, finerenone more potently inhibits MR co-regulator recruitment and fibrosis and distributes more evenly between the heart and kidneys. The landmark Phase III trials FIGARO-DKD and FIDELIO-DKD demonstrated that finerenone-reduced major kidney and cardiovascular events on top of maximally tolerated renin-angiotensin-aldosterone system inhibition in patients with CKD associated with Type 2 diabetes. Non-steroidal MRAs are currently under evaluation in heart failure and for synergistic treatment with sodium-glucose contransporter 2 inhibitors. These ground-breaking agents could become an important therapy across the spectrum of cardiorenal disease.
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Affiliation(s)
- Arjun K Pandey
- Michael G. DeGroote School of Medicine, McMaster University, Hamilton, ON, Canada
| | - Deepak L Bhatt
- Cardiovascular Division, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, USA
| | - Francesco Cosentino
- Cardiology Unit, Department of Medicine Solna, Karolinska Institute & Karolinska University Hospital, Stockholm, Sweden
| | - Nikolaus Marx
- Department of Internal Medicine I, Cardiology, University Hospital Aachen, RWTH Aachen University, Aachen, Germany
| | - Ori Rotstein
- Department of Surgery, St Michael's Hospital, University of Toronto, Toronto, ON, Canada
| | - Bertram Pitt
- Department of Medicine, University of Michigan School of Medicine, Ann Arbor, MI, USA
| | - Ambirash Pandey
- Division of Cardiology, Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas, TX, USA
| | - Javed Butler
- Department of Medicine, University of Mississippi School of Medicine, Jackson, MS, USA
| | - Subodh Verma
- Division of Cardiac Surgery, St Michael's Hospital, University of Toronto, Toronto, ON, Canada
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5
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Fu X, Almenglo C, Fernandez ÁL, Martínez-Cereijo JM, Iglesias-Alvarez D, Duran-Muñoz D, García-Caballero T, Gonzalez-Juanatey JR, Rodriguez-Mañero M, Eiras S. The Effect of Mineralocorticoid Receptor 3 Antagonists on Anti-Inflammatory and Anti-Fatty Acid Transport Profile in Patients with Heart Failure. Cells 2022; 11:cells11081264. [PMID: 35455943 PMCID: PMC9027091 DOI: 10.3390/cells11081264] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 04/04/2022] [Accepted: 04/06/2022] [Indexed: 02/01/2023] Open
Abstract
Epicardial fat thickness is associated with cardiovascular disease. Mineralocorticoid receptor antagonist (MRA), a pharmaceutical treatment for CVD, was found to have an effect on adipose tissue. Our aim was to analyse the main epicardial fat genesis and inflammation-involved cell markers and their regulation by risk factors and MRA. We included blood and epicardial or subcutaneous fat (EAT or SAT) from 71 patients undergoing heart surgery and blood from 66 patients with heart failure. Cell types (transcripts or proteins) were analysed by real-time polymerase chain reaction or immunohistochemistry. Plasma proteins were analysed by Luminex technology or enzyme-linked immunoassay. Our results showed an upregulation of fatty acid transporter levels after aldosterone-induced genesis. The MRA intake was the main factor associated with lower levels in epicardial fat. On the contrary, MRA upregulated the levels and its secretion of the anti-inflammatory marker intelectin 1 and reduced the proliferation of epicardial fibroblasts. Our results have shown the local MRA intake effect on fatty acid transporters and anti-inflammatory marker levels and the proliferation rate on epicardial fat fibroblasts. They suggest the role of MRA on epicardial fat genesis and remodelling in patients with cardiovascular disease. Translational perspective: the knowledge of epicardial fat genesis and its modulation by drugs might be useful for improving the treatments of cardiovascular disease.
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Affiliation(s)
- Xiaoran Fu
- Translational Cardiology Group, Health Research Institute, 15706 Santiago de Compostela, Spain;
| | - Cristina Almenglo
- Cardiology Group, Health Research Institute, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (C.A.); (D.I.-A.); (J.R.G.-J.)
| | - Ángel Luis Fernandez
- Heart Surgery Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (Á.L.F.); (J.M.M.-C.); (D.D.-M.)
- CIBERCV Madrid, Department of Morphological Sciences, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - José Manuel Martínez-Cereijo
- Heart Surgery Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (Á.L.F.); (J.M.M.-C.); (D.D.-M.)
| | - Diego Iglesias-Alvarez
- Cardiology Group, Health Research Institute, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (C.A.); (D.I.-A.); (J.R.G.-J.)
| | - Darío Duran-Muñoz
- Heart Surgery Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (Á.L.F.); (J.M.M.-C.); (D.D.-M.)
- CIBERCV Madrid, Department of Morphological Sciences, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Tomás García-Caballero
- Morphological Sciences Department, Medicine Faculty, University of Santiago de Compostela and Pathology Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain;
| | - Jose Ramón Gonzalez-Juanatey
- Cardiology Group, Health Research Institute, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain; (C.A.); (D.I.-A.); (J.R.G.-J.)
- CIBERCV Madrid, Department of Morphological Sciences, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Cardiology Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
| | - Moises Rodriguez-Mañero
- Translational Cardiology Group, Health Research Institute, 15706 Santiago de Compostela, Spain;
- CIBERCV Madrid, Department of Morphological Sciences, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Cardiology Department, University Hospital of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Correspondence: (M.R.-M.); (S.E.); Tel.: +34-616903275 (M.R.-M.); +34-981955074 (S.E.)
| | - Sonia Eiras
- Translational Cardiology Group, Health Research Institute, 15706 Santiago de Compostela, Spain;
- CIBERCV Madrid, Department of Morphological Sciences, University of Santiago de Compostela, 15706 Santiago de Compostela, Spain
- Correspondence: (M.R.-M.); (S.E.); Tel.: +34-616903275 (M.R.-M.); +34-981955074 (S.E.)
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6
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Barrera-Chimal J, Bonnard B, Jaisser F. Roles of Mineralocorticoid Receptors in Cardiovascular and Cardiorenal Diseases. Annu Rev Physiol 2022; 84:585-610. [PMID: 35143332 DOI: 10.1146/annurev-physiol-060821-013950] [Citation(s) in RCA: 32] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Mineralocorticoid receptor (MR) activation in the heart and vessels leads to pathological effects, such as excessive extracellular matrix accumulation, oxidative stress, and sustained inflammation. In these organs, the MR is expressed in cardiomyocytes, fibroblasts, endothelial cells, smooth muscle cells, and inflammatory cells. We review the accumulating experimental and clinical evidence that pharmacological MR antagonism has a positive impact on a battery of cardiac and vascular pathological states, including heart failure, myocardial infarction, arrhythmic diseases, atherosclerosis, vascular stiffness, and cardiac and vascular injury linked to metabolic comorbidities and chronic kidney disease. Moreover, we present perspectives on optimization of the use of MR antagonists in patients more likely to respond to such therapy and review the evidence suggesting that novel nonsteroidal MR antagonists offer an improved safety profile while retaining their cardiovascular protective effects. Finally, we highlight future therapeutic applications of MR antagonists in cardiovascular injury.
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Affiliation(s)
- Jonatan Barrera-Chimal
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, Mexico City, Mexico.,Laboratorio de Fisiología Cardiovascular y Trasplante Renal, Unidad de Investigación UNAM-INC, Instituto Nacional de Cardiología Ignacio Chávez, Mexico City, Mexico
| | - Benjamin Bonnard
- INSERM, UMRS 1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France;
| | - Frederic Jaisser
- INSERM, UMRS 1138, Centre de Recherche des Cordeliers, Sorbonne Université, Université de Paris, Paris, France; .,INSERM Centre d'Investigations Cliniques-Plurithématique 1433, UMR 1116, CHRU de Nancy, French-Clinical Research Infrastructure Network (F-CRIN INI-CRCT), Université de Lorraine, Nancy, France
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7
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Kolkhof P, Joseph A, Kintscher U. Nonsteroidal mineralocorticoid receptor antagonism for cardiovascular and renal disorders - New perspectives for combination therapy. Pharmacol Res 2021; 172:105859. [PMID: 34461222 DOI: 10.1016/j.phrs.2021.105859] [Citation(s) in RCA: 32] [Impact Index Per Article: 10.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/08/2021] [Revised: 08/16/2021] [Accepted: 08/25/2021] [Indexed: 02/06/2023]
Abstract
During the recent 30 years, there has been a dramatic increase in knowledge about the role of aldosterone and the mineralocorticoid receptor (MR) in the pathophysiology of cardiovascular (CV) and kidney diseases. The scientific perspective on the aldosterone/MR ensemble extended from a previously renal epithelial-centered focus on sodium-potassium exchange to a broader view as systemic modulators of extracellular matrix, inflammation and fibrosis. Spironolactone was launched as the first antagonist of aldosterone 27 years before the MR was cloned. It was classified as a potassium-sparing diuretic, based on its initial clinical characterization as a diuretic and its preferred activity to compensate for the potassium loss induced by loop diuretics when used in combination. The second steroidal MR antagonist was eplerenone which was discovered at a time when the role of aldosterone and MR in cardiac fibrosis was rediscovered. The constraint of developing potentially life-threatening hyperkalaemia when used in combination with other inhibitors of the renin-angiotensin-system (RAS) in patients with reduced kidney function initiated extensive research and development activities with the goal to identify novel nonsteroidal MR antagonists with an improved benefit-risk ratio. Here we summarize major current clinical trials with MRAs in different CV and renal diseases. Addition of the nonsteroidal MRA finerenone to optimal RAS blockade recently reduced CV and kidney outcomes in two large phase III trials in patients with chronic kidney disease (CKD) and type 2 diabetes (T2D). We provide an outlook on further opportunities for combination therapy of nonsteroidal MRA finerenone with RAS inhibitors and sodium-glucose cotransporter-2 inhibitors (SGLT2i).
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Affiliation(s)
- Peter Kolkhof
- Cardiovascular Research, Research and Early Development, R&D Pharmaceuticals, Bayer AG, Wuppertal, Germany.
| | - Amer Joseph
- Cardiology and Nephrology, Clinical Development, R&D Pharmaceuticals, Bayer AG, Berlin, Germany
| | - Ulrich Kintscher
- Charite - Universitätsmedizin Berlin, corporate member of Freie Universität Berlin and Humboldt-Universität zu Berlin, Institute of Pharmacology, Cardiovascular-Metabolic-Renal Research Center, 10115 Berlin, Germany; DZHK (German Centre for Cardiovascular Research), partner site Berlin, Germany
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8
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He Y, Wang G, Gao H, Liu Y, Li H, Feng Y, Tang J. Prolonged duration of repolarization and decreased conduction velocity in the atrial myocardium after hypothermic ischemia-reperfusion may be related to expressions of inward rectifier potassium channel 2.1 protein and connexin 40. Perfusion 2021; 36:146-153. [PMID: 32650696 DOI: 10.1177/0267659120934612] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
OBJECTIVES The study aimed to determine the role of inward rectifier potassium channel 2.1 protein and connexin 40 expressions in regulating the duration of repolarization and conduction velocity of right atrial myocardium in rats following hypothermic ischemia-reperfusion. METHODS The Langendorff isolated rat cardiac perfusion models were divided into control (C) and hypothermic ischemia-reperfusion groups, with 8 models in group C and 16 models in group ischemia-reperfusion. Depending on the incidence of atrial arrhythmia after reperfusion, the models in group ischemia-reperfusion were further divided into reperfusion non-atrial arrhythmia or reperfusion atrial arrhythmia subgroup. Right atrial monophasic action potential duration at 50% and 90% of repolarization after 30 minutes of continuous perfusion in group C and group ischemia-reperfusion (T0), 105 minutes of continuous perfusion in group C or after 15 minutes of reperfusion in group ischemia-reperfusion (T1) and 120 minutes of continuous perfusion in group C or 30 minutes of reperfusion in group ischemia-reperfusion (T2) were recorded. Right atrial conduction velocity and effective refractory period were recorded at T2. Then, the expressions of inward rectifier potassium channel 2.1 protein and connexin 40 in the right atrial myocardium were detected. RESULTS Monophasic action potential duration at 50% and 90% were higher at T1 and T2 than those at T0 in subgroup reperfusion atrial arrhythmia (p < 0.05); monophasic action potential duration at 50% in subgroup reperfusion atrial arrhythmia were larger than group C and subgroup reperfusion non-atrial arrhythmia at T1 and T2 (p < 0.05); monophasic action potential duration at 90% in subgroup reperfusion atrial arrhythmia were larger than group C and subgroup reperfusion non-atrial arrhythmia at T1 and T2 (p < 0.05); effective refractory period in subgroup reperfusion atrial arrhythmia was greater than that in group C and subgroup reperfusion non-atrial arrhythmia, and the conduction velocity and the expressions of inward rectifier potassium channel 2.1 protein and connexin 40 were significantly lower than group C and subgroup reperfusion non-atrial arrhythmia (p < 0.05). CONCLUSIONS The prolonged duration of repolarization and a decrease in conduction velocity of the atrial myocardium occur in rats after hypothermic ischemia-reperfusion. These observed effects may be related to the downregulated expressions of connexin 40 and inward rectifier potassium channel 2.1.
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Affiliation(s)
- Youqin He
- School of Anesthesiology, Guizhou Medical University, Guiyang, P.R. China
| | - Guilong Wang
- Department of Anesthesiology, The People's Hospital of Zhijin County, Bijie, P.R. China
| | - Hong Gao
- The Third Affiliated Hospital of Guizhou Medical University, Duyun, P.R. China
| | - Yanqiu Liu
- Department of Anesthesiology, The Affiliated Hospital of Guizhou Medical University, Guiyang, P.R. China
| | - Huayu Li
- School of Anesthesiology, Guizhou Medical University, Guiyang, P.R. China
| | - Yurong Feng
- School of Anesthesiology, Guizhou Medical University, Guiyang, P.R. China
| | - Jian Tang
- School of Anesthesiology, Guizhou Medical University, Guiyang, P.R. China
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Ollitrault P, Allouche S, Chequel M, Milliez P, Alexandre J. Plasma aldosterone and atrial mitochondrial functions of patients undergoing cardiac surgery. Future Cardiol 2020; 16:275-280. [PMID: 32286862 DOI: 10.2217/fca-2019-0028] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Aim: Mitochondrial dysfunction (MD) has been associated with poor outcomes after coronary artery bypass graft surgery. Methods: 58 consecutive patients from the ALDO-POAF Study (NCT02814903) were prospectively included. Plasma aldosterone was assessed at the time of the preoperative consultation and mitochondrial functional studies were performed using atrial appendage tissue collected during surgery. Results: Patients with the highest preoperative plasma aldosterone level had a lower mitochondrial respiratory chain functioning and a lower calcium retention capacity. Chronic kidney disease, patient's age and preoperative high-aldosterone were independent predictors of MD in multivariate analysis. Conclusion: These exploratory data support the use of preventive strategies targeting aldosterone and/or mineralocorticoid receptor activation, in order to prevent perioperative MD and associated poor outcomes.
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Affiliation(s)
- Pierre Ollitrault
- Department of Cardiology, Normandie Univ, Unicaen, F-14000 Caen, France.,EA 4650 (Signalisation, électrophysiologie et imagerie des lesions d'ischémie-reperfusion myocardique), Normandie Univ, Unicaen, F-14000 Caen, France
| | - Stéphane Allouche
- EA 4650 (Signalisation, électrophysiologie et imagerie des lesions d'ischémie-reperfusion myocardique), Normandie Univ, Unicaen, F-14000 Caen, France.,Department of Biochemistry, Caen University Hospital, Normandie Univ, Unicaen, F-14000 Caen, France
| | - Mathieu Chequel
- Department of Cardiology, Normandie Univ, Unicaen, F-14000 Caen, France.,EA 4650 (Signalisation, électrophysiologie et imagerie des lesions d'ischémie-reperfusion myocardique), Normandie Univ, Unicaen, F-14000 Caen, France
| | - Paul Milliez
- Department of Cardiology, Normandie Univ, Unicaen, F-14000 Caen, France.,EA 4650 (Signalisation, électrophysiologie et imagerie des lesions d'ischémie-reperfusion myocardique), Normandie Univ, Unicaen, F-14000 Caen, France
| | - Joachim Alexandre
- Department of Cardiology, Normandie Univ, Unicaen, F-14000 Caen, France.,EA 4650 (Signalisation, électrophysiologie et imagerie des lesions d'ischémie-reperfusion myocardique), Normandie Univ, Unicaen, F-14000 Caen, France.,Department of Pharmacology, Normandie Univ, Unicaen, F-14000 Caen, France
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