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Gong G, Wan W, Zhang X, Chen X, Yin J. Management of ROS and Regulatory Cell Death in Myocardial Ischemia-Reperfusion Injury. Mol Biotechnol 2024:10.1007/s12033-024-01173-y. [PMID: 38852121 DOI: 10.1007/s12033-024-01173-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: 12/13/2023] [Accepted: 04/02/2024] [Indexed: 06/10/2024]
Abstract
Myocardial ischemia-reperfusion injury (MIRI) is fatal to patients, leading to cardiomyocyte death and myocardial remodeling. Reactive oxygen species (ROS) and oxidative stress play important roles in MIRI. There is a complex crosstalk between ROS and regulatory cell deaths (RCD) in cardiomyocytes, such as apoptosis, pyroptosis, autophagy, and ferroptosis. ROS is a double-edged sword. A reasonable level of ROS maintains the normal physiological activity of myocardial cells. However, during myocardial ischemia-reperfusion, excessive ROS generation accelerates myocardial damage through a variety of biological pathways. ROS regulates cardiomyocyte RCD through various molecular mechanisms. Targeting the removal of excess ROS has been considered an effective way to reverse myocardial damage. Many studies have applied antioxidant drugs or new advanced materials to reduce ROS levels to alleviate MIRI. Although the road from laboratory to clinic has been difficult, many scholars still persevere. This article reviews the molecular mechanisms of ROS inhibition to regulate cardiomyocyte RCD, with a view to providing new insights into prevention and treatment strategies for MIRI.
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Affiliation(s)
- Ge Gong
- Department of Geriatrics, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 211002, China
| | - Wenhui Wan
- Department of Geriatrics, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 211002, China
| | - Xinghu Zhang
- Department of Geriatrics, Jinling Hospital, Affiliated Hospital of Medical School, Nanjing University, Nanjing, 211002, China
| | - Xiangxuan Chen
- Department of Cardiology, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, 211100, China.
| | - Jian Yin
- Department of Orthopedics, the Affiliated Jiangning Hospital with Nanjing Medical University, Nanjing, 211100, China.
- Department of Orthopedics, Jiangning Clinical Medical College of Jiangsu Medical Vocational College, Nanjing, 211100, China.
- Department of Orthopedics, Jiangning Clinical Medical College of Nanjing Medical University Kangda College, Nanjing, 211100, China.
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Arnold M, Do P, Davidson SM, Large SR, Helmer A, Beer G, Siepe M, Longnus SL. Metabolic Considerations in Direct Procurement and Perfusion Protocols with DCD Heart Transplantation. Int J Mol Sci 2024; 25:4153. [PMID: 38673737 PMCID: PMC11050041 DOI: 10.3390/ijms25084153] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/29/2024] [Revised: 04/04/2024] [Accepted: 04/05/2024] [Indexed: 04/28/2024] Open
Abstract
Heart transplantation with donation after circulatory death (DCD) provides excellent patient outcomes and increases donor heart availability. However, unlike conventional grafts obtained through donation after brain death, DCD cardiac grafts are not only exposed to warm, unprotected ischemia, but also to a potentially damaging pre-ischemic phase after withdrawal of life-sustaining therapy (WLST). In this review, we aim to bring together knowledge about changes in cardiac energy metabolism and its regulation that occur in DCD donors during WLST, circulatory arrest, and following the onset of warm ischemia. Acute metabolic, hemodynamic, and biochemical changes in the DCD donor expose hearts to high circulating catecholamines, hypoxia, and warm ischemia, all of which can negatively impact the heart. Further metabolic changes and cellular damage occur with reperfusion. The altered energy substrate availability prior to organ procurement likely plays an important role in graft quality and post-ischemic cardiac recovery. These aspects should, therefore, be considered in clinical protocols, as well as in pre-clinical DCD models. Notably, interventions prior to graft procurement are limited for ethical reasons in DCD donors; thus, it is important to understand these mechanisms to optimize conditions during initial reperfusion in concert with graft evaluation and re-evaluation for the purpose of tailoring and adjusting therapies and ensuring optimal graft quality for transplantation.
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Affiliation(s)
- Maria Arnold
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University of Bern, 3008 Bern, Switzerland
| | - Peter Do
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Sean M. Davidson
- The Hatter Cardiovascular Institute, University College London, London WC1E 6HX, UK
| | - Stephen R. Large
- Royal Papworth Hospital, Biomedical Campus, Cambridge CB2 0AY, UK
| | - Anja Helmer
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University of Bern, 3008 Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Georgia Beer
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University of Bern, 3008 Bern, Switzerland
- Graduate School for Cellular and Biomedical Sciences, University of Bern, 3012 Bern, Switzerland
| | - Matthias Siepe
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
| | - Sarah L. Longnus
- Department of Cardiac Surgery, Inselspital, Bern University Hospital, University of Bern, 3010 Bern, Switzerland
- Department for BioMedical Research, University of Bern, 3008 Bern, Switzerland
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Sagris M, Apostolos A, Theofilis P, Ktenopoulos N, Katsaros O, Tsalamandris S, Tsioufis K, Toutouzas K, Tousoulis D. Myocardial Ischemia-Reperfusion Injury: Unraveling Pathophysiology, Clinical Manifestations, and Emerging Prevention Strategies. Biomedicines 2024; 12:802. [PMID: 38672157 PMCID: PMC11048318 DOI: 10.3390/biomedicines12040802] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2024] [Revised: 03/02/2024] [Accepted: 03/29/2024] [Indexed: 04/28/2024] Open
Abstract
Myocardial ischemia-reperfusion injury (MIRI) remains a challenge in the context of reperfusion procedures for myocardial infarction (MI). While early revascularization stands as the gold standard for mitigating myocardial injury, recent insights have illuminated the paradoxical role of reperfusion, giving rise to the phenomenon known as ischemia-reperfusion injury. This comprehensive review delves into the intricate pathophysiological pathways involved in MIRI, placing a particular focus on the pivotal role of endothelium. Beyond elucidating the molecular intricacies, we explore the diverse clinical manifestations associated with MIRI, underscoring its potential to contribute substantially to the final infarct size, up to 50%. We further navigate through current preventive approaches and highlight promising emerging strategies designed to counteract the devastating effects of the phenomenon. By synthesizing current knowledge and offering a perspective on evolving preventive interventions, this review serves as a valuable resource for clinicians and researchers engaged in the dynamic field of MIRI.
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Affiliation(s)
- Marios Sagris
- Correspondence: ; Tel.: +30-213-2088099; Fax: +30-2132088676
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Guo X, Qu FX, Zhang JD, Zheng F, Xin Y, Wang R, Li JY, Li HY, Lu CH. Amygdalin and exercise training exert a synergistic effect in improving cardiac performance and ameliorating cardiac inflammation and fibrosis in a rat model of myocardial infarction. Appl Physiol Nutr Metab 2024; 49:360-374. [PMID: 37944128 DOI: 10.1139/apnm-2023-0135] [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] [Indexed: 11/12/2023]
Abstract
This study investigated the effects of amygdalin (AMY, a cyanogenic glycoside widely distributed in the fruits and seeds of Rosaceae plants) on cardiac performance and ventricular remodeling in a rat model of myocardial infarction (MI). We also investigated whether the combination of AMY with exercise training (ExT) has a beneficial synergistic effect in treating MI rats. MI was induced by the ligation of the left anterior descending coronary artery in male SD rats. ExT or AMY treatment was started 1 week after MI and continued for 1 week (short-term) or 8 weeks (long-term). Cardiac function was evaluated by echocardiographic and hemodynamic parameters. Heart tissues were harvested and subjected to 2,3,5-triphenyl-tetrazolium chloride, Masson's trichrome, hematoxylin-eosin, and immunohistochemical staining. Gene expression was determined by quantitative polymerase chain reaction. Western blot gave a qualitative assessment of protein levels. AMY or ExT improved cardiac function and reduced infarct size in MI rats. AMY or ExT also suppressed myocardial fibrosis and attenuated inflammation in the infarct border zone of hearts from MI rats, as evidenced by inhibition of collagen deposition, inflammatory cell infiltration, and pro-inflammatory markers (interleukin 1β, interleukin 6, tumor necrosis factor-α, and cyclooxygenase 2). Notably, the effects of AMY combined with ExT were superior to those of AMY alone or ExT alone. Mechanistically, these beneficial functions were correlated with the inhibition of MI-induced activation of the transforming growth factor-β/Smad pathway. Collectively, AMY and ExT exert a synergistic effect on improving cardiac performance and ameliorating cardiac inflammation and fibrosis after MI, and the effects of long-term intervention were better than short-term intervention.
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Affiliation(s)
- Xiao Guo
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Feng-Xia Qu
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Ji-Dong Zhang
- Department of Cardiology, the Affiliated Hospital of Qingdao University, Qingdao 266000, Shandong, People's Republic of China
| | - Fa Zheng
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Yue Xin
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Rong Wang
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Jing-Yuan Li
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Hai-Ying Li
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
| | - Chang-Hong Lu
- Heart Center, Qingdao Fuwai Cardiovascular Hospital, Qingdao 266034, Shandong, People's Republic of China
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Parikh M, Pierce GN. Considerations for choosing an optimal animal model of cardiovascular disease. Can J Physiol Pharmacol 2024; 102:75-85. [PMID: 37748198 DOI: 10.1139/cjpp-2023-0206] [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] [Indexed: 09/27/2023]
Abstract
The decision to use the optimal animal model to mimic the various types of cardiovascular disease is a critical one for a basic scientist. Clinical cardiovascular disease can be complex and presents itself as atherosclerosis, hypertension, ischemia/reperfusion injury, myocardial infarcts, and cardiomyopathies, amongst others. This may be further complicated by the simultaneous presence of two or more cardiovascular lesions (for example, atherosclerosis and hypertension) and co-morbidities (i.e., diabetes, infectious disease, obesity, etc). This variety and merging of disease states creates an unusually difficult situation for the researcher who needs to identify the optimal animal model that is available to best represent all of the characteristics of the clinical cardiovascular disease. The present manuscript reviews the characteristics of the various animal models of cardiovascular disease available today, their advantages and disadvantages, with the goal to allow the reader access to the most recent data available for optimal choices prior to the initiation of the study. The animal species that can be chosen, the methods of generating these models of cardiovascular disease, as well as the specific cardiovascular lesions involved in each of these models are reviewed. A particular focus on the JCR:LA-cp rat as a model of cardiovascular disease is discussed.
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Affiliation(s)
- Mihir Parikh
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St. Boniface Hospital, Winnipeg, MB, Canada
| | - Grant N Pierce
- Department of Physiology and Pathophysiology, Rady Faculty of Health Sciences, University of Manitoba, Winnipeg, MB, Canada
- Institute of Cardiovascular Sciences, Albrechtsen Research Centre, St. Boniface Hospital, Winnipeg, MB, Canada
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Pastena P, Frye JT, Ho C, Goldschmidt ME, Kalogeropoulos AP. Ischemic cardiomyopathy: epidemiology, pathophysiology, outcomes, and therapeutic options. Heart Fail Rev 2024; 29:287-299. [PMID: 38103139 DOI: 10.1007/s10741-023-10377-4] [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] [Accepted: 11/29/2023] [Indexed: 12/17/2023]
Abstract
Ischemic cardiomyopathy (ICM) is the most prevalent cause of heart failure (HF) in developed countries, with significant morbidity and mortality, despite constant improvements in the management of coronary artery disease. Current literature on this topic remains fragmented. Therefore, this review aimed to summarize the most recent data on ICM, focusing on its definition, epidemiology, outcomes, and therapeutic options. The most widely accepted definition is represented by a left ventricular dysfunction in the presence of significant coronary artery disease. The prevalence of ICM is largely influenced by age and sex, with older individuals and males being more affected. Its pathophysiology is characterized by plaque buildup, thrombus formation, hypoperfusion, ischemic cell death, and left ventricular remodeling. Despite improvements in therapy, ICM still represents a public health burden, with a 1-year mortality rate of 16% and a 5-year mortality rate of approximately 40% in the USA and Europe. Therefore, optimization of cardiovascular function, prevention of progressive remodeling, reduction of HF symptoms, and improved survival are the main goals of treatment. Therapeutic options for ICM include lifestyle changes, optimal medical therapy, revascularization, device therapy, mechanical circulatory support, and cardiac transplantation. Personalized management strategies and tailored patient care are needed to improve the outcomes of patients with ICM.
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Affiliation(s)
- Paola Pastena
- Division of Cardiology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Jesse T Frye
- Division of Cardiology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Carson Ho
- College of Arts and Sciences, Stony Brook University, Stony Brook, NY, USA
| | - Marc E Goldschmidt
- Division of Cardiology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA
| | - Andreas P Kalogeropoulos
- Division of Cardiology, Department of Medicine, Stony Brook University, Stony Brook, NY, USA.
- Stony Brook University Medical Center, Health Sciences Center, 101 Nicolls Road, T-16-080, Stony Brook, NY, USA.
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Stephan D, Blatt S, Riedel J, Mohnke K, Ruemmler R, Ziebart A, Al-Nawas B, Kämmerer PW, Thiem DGE. The Impact of Transfer-Related Ischemia on Free Flap Metabolism and Electrolyte Homeostasis-A New In Vivo Experimental Approach in Pigs. J Clin Med 2023; 12:6625. [PMID: 37892763 PMCID: PMC10607031 DOI: 10.3390/jcm12206625] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2023] [Revised: 10/12/2023] [Accepted: 10/16/2023] [Indexed: 10/29/2023] Open
Abstract
Free flap tissue transfer represents the gold standard for extensive defect reconstruction, although malperfusion due to thrombosis remains the leading risk factor for flap failure. Recent studies indicate an increased immune response and platelet activation in connection with pathologic coagulation. The underlying cellular and molecular mechanisms remain poorly understood, however. The presented study, therefore, aims to investigate if transfer-related ischemia alters intra-flap metabolism and electrolyte concentrations compared to central venous blood after free flap transfer in pigs to establish a novel experimental model. Free transfer of a myocutaneous gracilis flap to the axillary region was conducted in five juvenile male pigs. The flap artery was anastomosed to the axillary artery, and intra-flap venous blood was drained and transfused using a rubber-elastic fixed intravenous catheter. Blood gas analysis was performed to assess the effect of transfer time-induced ischemia on intra-flap electrolyte levels, acid-base balance, and hemoglobin concentrations compared to central venous blood. Time to flap reperfusion was 52 ± 10 min on average, resulting in a continuous pH drop (acidosis) in the flaps' venous blood compared to the central venous system (p = 0.037). Potassium (p = 0.016), sodium (p = 0.003), and chloride (p = 0.007) concentrations were significantly increased, whereas bicarbonate (p = 0.016) and calcium (p = 0.008) significantly decreased within the flap. These observations demonstrate the induction of anaerobic glycolysis and electrolyte displacement resulting in acidosis and hence significant tissue damage already after a short ischemic period, thereby validating the novel animal model for investigating intra-flap metabolism and offering opportunities for exploring various (immuno-) thrombo-hemostatic issues in transplantation surgery.
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Affiliation(s)
- Daniel Stephan
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Sebastian Blatt
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Julian Riedel
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Katja Mohnke
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Robert Ruemmler
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Alexander Ziebart
- Department of Anaesthesiology, University Medical Centre, Johannes Gutenberg University Mainz, Langenbeckstraße 1, 55131 Mainz, Germany; (J.R.); (K.M.); (R.R.); (A.Z.)
| | - Bilal Al-Nawas
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Peer W. Kämmerer
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
| | - Daniel G. E. Thiem
- Department of Oral and Maxillofacial Surgery, Facial Plastic Surgery, University Medical Centre, Johannes Gutenberg University Mainz, Augustusplatz 2, 55131 Mainz, Germany; (S.B.); (B.A.-N.); (P.W.K.); (D.G.E.T.)
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Ouhaddi Y, Dalisson B, Rastinfard A, Gilardino M, Watters K, Job D, Azizi-Mehr P, Merle G, Lasagabaster AV, Barralet J. Necrosis reduction efficacy of subdermal biomaterial mediated oxygen delivery in ischemic skin flaps. BIOMATERIALS ADVANCES 2023; 153:213519. [PMID: 37392519 DOI: 10.1016/j.bioadv.2023.213519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 05/24/2023] [Accepted: 06/10/2023] [Indexed: 07/03/2023]
Abstract
Inadequate tissue blood supply as may be found in a wound or a poorly vascularised graft, can result in tissue ischemia and necrosis. As revascularization is a slow process relative to the proliferation of bacteria and the onset of tissue necrosis, extensive tissue damage and loss can occur before healing is underway. Necrosis can develop rapidly, and treatment options are limited such that loss of tissue following necrosis onset is considered unavoidable and irreversible. Oxygen delivery from biomaterials exploiting aqueous decomposition of peroxy-compounds has shown some potential in overcoming the supply limitations by creating oxygen concentration gradients higher than can be attained physiologically or by air saturated solutions. We sought to test whether subdermal oxygen delivery from a material composite that was buffered and contained a catalyst, to reduce hydrogen peroxide release, could ameliorate necrosis in a 9 × 2 cm flap in a rat model that reliably underwent 40 % necrosis if untreated. Blood flow in this flap reduced from near normal to essentially zero, along its 9 cm length and subdermal perforator vessel anastomosis was physically prevented by placement of a polymer sheet. In the middle, low blood flow region of the flap, treatment significantly reduced necrosis based on measurements from photographs and histological micrographs. No change was observed in blood vessel density but significant differences in HIF1-α, inducible nitric oxide synthase and liver arginase were observed with oxygen delivery.
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Affiliation(s)
- Yassine Ouhaddi
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Benjamin Dalisson
- Faculty of Dentistry, McGill University, 2001 McGill College Avenue, Montreal, QC, H3A 1G1, Canada
| | - Arghavan Rastinfard
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Mirko Gilardino
- Division of Pastic and Reconstructive Surgery, Department of Surgery, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Kevin Watters
- Department of Pathology, Glen Site, McGill University Health Centre, Montreal, Quebec H4A 3J1, Canada
| | - Dario Job
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Parsa Azizi-Mehr
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Geraldine Merle
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Arturo Vela Lasagabaster
- Division of Pastic and Reconstructive Surgery, Department of Surgery, Montreal General Hospital, Montreal, QC H3G 1A4, Canada
| | - Jake Barralet
- Division of Orthopaedics, Department of Surgery, Faculty of Medicine and Health Sciences, Montreal General Hospital, Montreal, QC H3G 1A4, Canada; Faculty of Dentistry, McGill University, 2001 McGill College Avenue, Montreal, QC, H3A 1G1, Canada.
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Ndrepepa G, Kastrati A. Coronary No-Reflow after Primary Percutaneous Coronary Intervention-Current Knowledge on Pathophysiology, Diagnosis, Clinical Impact and Therapy. J Clin Med 2023; 12:5592. [PMID: 37685660 PMCID: PMC10488607 DOI: 10.3390/jcm12175592] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/10/2023] [Revised: 08/17/2023] [Accepted: 08/26/2023] [Indexed: 09/10/2023] Open
Abstract
Coronary no-reflow (CNR) is a frequent phenomenon that develops in patients with ST-segment elevation myocardial infarction (STEMI) following reperfusion therapy. CNR is highly dynamic, develops gradually (over hours) and persists for days to weeks after reperfusion. Microvascular obstruction (MVO) developing as a consequence of myocardial ischemia, distal embolization and reperfusion-related injury is the main pathophysiological mechanism of CNR. The frequency of CNR or MVO after primary PCI differs widely depending on the sensitivity of the tools used for diagnosis and timing of examination. Coronary angiography is readily available and most convenient to diagnose CNR but it is highly conservative and underestimates the true frequency of CNR. Cardiac magnetic resonance (CMR) imaging is the most sensitive method to diagnose MVO and CNR that provides information on the presence, localization and extent of MVO. CMR imaging detects intramyocardial hemorrhage and accurately estimates the infarct size. MVO and CNR markedly negate the benefits of reperfusion therapy and contribute to poor clinical outcomes including adverse remodeling of left ventricle, worsening or new congestive heart failure and reduced survival. Despite extensive research and the use of therapies that target almost all known pathophysiological mechanisms of CNR, no therapy has been found that prevents or reverses CNR and provides consistent clinical benefit in patients with STEMI undergoing reperfusion. Currently, the prevention or alleviation of MVO and CNR remain unmet goals in the therapy of STEMI that continue to be under intense research.
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Affiliation(s)
- Gjin Ndrepepa
- Deutsches Herzzentrum München, Technische Universität München, Lazarettstrasse 36, 80636 Munich, Germany;
| | - Adnan Kastrati
- Deutsches Herzzentrum München, Technische Universität München, Lazarettstrasse 36, 80636 Munich, Germany;
- German Center for Cardiovascular Research (DZHK), Partner Site Munich Heart Alliance, 80336 Munich, Germany
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10
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Sánchez-Pérez P, Mata A, Torp MK, López-Bernardo E, Heiestad CM, Aronsen JM, Molina-Iracheta A, Jiménez-Borreguero LJ, García-Roves P, Costa ASH, Frezza C, Murphy MP, Stenslokken KO, Cadenas S. Energy substrate metabolism, mitochondrial structure and oxidative stress after cardiac ischemia-reperfusion in mice lacking UCP3. Free Radic Biol Med 2023; 205:244-261. [PMID: 37295539 DOI: 10.1016/j.freeradbiomed.2023.05.014] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/19/2023] [Revised: 04/22/2023] [Accepted: 05/15/2023] [Indexed: 06/12/2023]
Abstract
Myocardial ischemia-reperfusion (IR) injury may result in cardiomyocyte dysfunction. Mitochondria play a critical role in cardiomyocyte recovery after IR injury. The mitochondrial uncoupling protein 3 (UCP3) has been proposed to reduce mitochondrial reactive oxygen species (ROS) production and to facilitate fatty acid oxidation. As both mechanisms might be protective following IR injury, we investigated functional, mitochondrial structural, and metabolic cardiac remodeling in wild-type mice and in mice lacking UCP3 (UCP3-KO) after IR. Results showed that infarct size in isolated perfused hearts subjected to IR ex vivo was larger in adult and old UCP3-KO mice than in equivalent wild-type mice, and was accompanied by higher levels of creatine kinase in the effluent and by more pronounced mitochondrial structural changes. The greater myocardial damage in UCP3-KO hearts was confirmed in vivo after coronary artery occlusion followed by reperfusion. S1QEL, a suppressor of superoxide generation from site IQ in complex I, limited infarct size in UCP3-KO hearts, pointing to exacerbated superoxide production as a possible cause of the damage. Metabolomics analysis of isolated perfused hearts confirmed the reported accumulation of succinate, xanthine and hypoxanthine during ischemia, and a shift to anaerobic glucose utilization, which all recovered upon reoxygenation. The metabolic response to ischemia and IR was similar in UCP3-KO and wild-type hearts, being lipid and energy metabolism the most affected pathways. Fatty acid oxidation and complex I (but not complex II) activity were equally impaired after IR. Overall, our results indicate that UCP3 deficiency promotes enhanced superoxide generation and mitochondrial structural changes that increase the vulnerability of the myocardium to IR injury.
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Affiliation(s)
- Patricia Sánchez-Pérez
- Centro de Biología Molecular "Severo Ochoa" (CSIC/UAM), 28049, Madrid, Spain; Instituto de Investigación Sanitaria Princesa (IIS-IP), 28006, Madrid, Spain
| | - Ana Mata
- Centro de Biología Molecular "Severo Ochoa" (CSIC/UAM), 28049, Madrid, Spain; Instituto de Investigación Sanitaria Princesa (IIS-IP), 28006, Madrid, Spain
| | - May-Kristin Torp
- Centro de Biología Molecular "Severo Ochoa" (CSIC/UAM), 28049, Madrid, Spain; Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, PB1110, N-0317, Oslo, Norway
| | - Elia López-Bernardo
- Centro de Biología Molecular "Severo Ochoa" (CSIC/UAM), 28049, Madrid, Spain; Instituto de Investigación Sanitaria Princesa (IIS-IP), 28006, Madrid, Spain
| | - Christina M Heiestad
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, PB1110, N-0317, Oslo, Norway
| | - Jan Magnus Aronsen
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, PB1110, N-0317, Oslo, Norway; Bjørknes College, 0456, Oslo, Norway
| | | | - Luis J Jiménez-Borreguero
- Instituto de Investigación Sanitaria Princesa (IIS-IP), 28006, Madrid, Spain; Servicio de Cardiología, Hospital Universitario de La Princesa, 28006, Madrid, Spain; Centro de Investigación Biomédica en Red Enfermedades Cardiovasculares (CIBERCV), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Pablo García-Roves
- Department of Physiological Sciences, Universitat de Barcelona, 08907, Barcelona, Spain; Nutrition, Metabolism and Gene Therapy Group, Diabetes and Metabolism Program, Institut d'Investigació Biomèdica de Bellvitge (IDIBELL), Barcelona, Spain; Centro de Investigación Biomédica en Red Fisiopatología de la Obesidad y la Nutrición (CIBEROBN), Instituto de Salud Carlos III, 28029, Madrid, Spain
| | - Ana S H Costa
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Center, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK
| | - Christian Frezza
- MRC Cancer Unit, University of Cambridge, Hutchison/MRC Research Center, Cambridge Biomedical Campus, Cambridge, CB2 0XZ, UK
| | - Michael P Murphy
- MRC Mitochondrial Biology Unit, University of Cambridge, Wellcome Trust/MRC Building, Cambridge, CB2 0XY, UK
| | - Kåre-Olav Stenslokken
- Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo, PB1110, N-0317, Oslo, Norway
| | - Susana Cadenas
- Centro de Biología Molecular "Severo Ochoa" (CSIC/UAM), 28049, Madrid, Spain; Instituto de Investigación Sanitaria Princesa (IIS-IP), 28006, Madrid, Spain.
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11
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Mangla R, Venkatesh R, Sangoram R, Acharya I, Parmar Y, Prabhu V, Yadav NK, Chhablani J. Retinal OCT findings in acute central retinal artery occlusion of varying severity at different disease stages - a retrospective, observational study. Int J Retina Vitreous 2023; 9:37. [PMID: 37349781 DOI: 10.1186/s40942-023-00475-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Accepted: 06/11/2023] [Indexed: 06/24/2023] Open
Abstract
PURPOSE To study the optical coherence tomography (OCT) changes in eyes with acute central retinal artery occlusion (CRAO) of different severity and at different disease stages. METHODS The study included acute CRAO cases of < 7 days duration, imaged on OCT at various time points. Based on the OCT findings at presentation, cases were classified into three severity groups: mild, moderate, and severe. OCT scans were evaluated and classified into four-time intervals based on symptom duration. RESULTS There were 39 eyes from 38 patients with acute CRAO who underwent 96 OCT scans. At presentation, the study had 11, 16, and 12 cases of mild, moderate, and severe CRAO, respectively. Middle retinal layer opacification was more common in mild CRAO cases, which caused inner retinal layer thinning over time. Moderate CRAO cases had total inner retinal layer opacification, which resulted in retinal thinning over time. Prominent middle limiting membrane (p-MLM) sign was seen in mild and moderate CRAO eyes while were not visualised in severe CRAO. This sign gradually faded out over time. Other OCT findings in higher grades of CRAO included inner retinal fluid, neurosensory detachment, internal limiting membrane detachment, hyperreflective foci, and posterior vitreous opacities. Regardless of the CRAO grade, the final end-point seen was inner retinal layer thinning over time. CONCLUSION OCT in CRAO is a useful for determining the severity of retinal ischemia, disease stage, tissue damage mechanism, and final visual outcome. More prospective studies analysing a larger number of cases at fixed time points will be required in the future. TRIAL REGISTRATION Trial Registration Number: Not applicable.
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Affiliation(s)
- Rubble Mangla
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Ramesh Venkatesh
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India.
| | - Rohini Sangoram
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Isha Acharya
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Yash Parmar
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Vishma Prabhu
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Naresh Kumar Yadav
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord Road, Rajaji Nagar, 560010, Bengaluru, Karnataka, India
| | - Jay Chhablani
- Medical Retina and Vitreoretinal Surgery, University of Pittsburgh School of Medicine, 203 Lothrop Street, Suite 800, Pittsburg, PA, 15213, USA
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12
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Liu Y, Ji X, Zhou Z, Zhang J, Zhang J. Myocardial ischemia-reperfusion injury; Molecular mechanisms and prevention. Microvasc Res 2023:104565. [PMID: 37307911 DOI: 10.1016/j.mvr.2023.104565] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 05/30/2023] [Accepted: 06/06/2023] [Indexed: 06/14/2023]
Abstract
Cardiovascular diseases are one of the leading causes of mortality in developed countries. Among cardiovascular disorders, myocardial infarction remains a life-threatening problem predisposing to the development and progression of ischemic heart failure. Ischemia/reperfusion (I/R) injury is a critical cause of myocardial injury. In recent decades, many efforts have been made to find the molecular and cellular mechanisms underlying the development of myocardial I/R injury and post-ischemic remodeling. Some of these mechanisms are mitochondrial dysfunction, metabolic alterations, inflammation, high production of ROS, and autophagy deregulation. Despite continuous efforts, myocardial I/R injury remains a major challenge in medical treatments of thrombolytic therapy, heart disease, primary percutaneous coronary intervention, and coronary arterial bypass grafting. The development of effective therapeutic strategies to reduce or prevent myocardial I/R injury is of great clinical significance.
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Affiliation(s)
- Yang Liu
- Department of Cardiology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250011, China
| | - Xiang Ji
- Department of Integrative, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250011, China
| | - Zhou Zhou
- First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan 250011, China
| | - Jingwen Zhang
- Department of Cardiology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250011, China
| | - Juan Zhang
- Department of Cardiology, The Affiliated Hospital of Shandong University of Traditional Chinese Medicine, Jinan 250011, China; First Clinical Medical College, Shandong University of Traditional Chinese Medicine, Jinan 250011, China.
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13
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Cao Y, Redd MA, Fang C, Mizikovsky D, Li X, Macdonald PS, King GF, Palpant NJ. New Drug Targets and Preclinical Modelling Recommendations for Treating Acute Myocardial Infarction. Heart Lung Circ 2023:S1443-9506(23)00139-7. [PMID: 37230806 DOI: 10.1016/j.hlc.2022.12.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 11/28/2022] [Accepted: 12/15/2022] [Indexed: 05/27/2023]
Abstract
Acute myocardial infarction (AMI) is the leading cause of morbidity and mortality worldwide and the primary underlying risk factor for heart failure. Despite decades of research and clinical trials, there are no drugs currently available to prevent organ damage from acute ischaemic injuries of the heart. In order to address the increasing global burden of heart failure, drug, gene, and cell-based regeneration technologies are advancing into clinical testing. In this review we highlight the burden of disease associated with AMI and the therapeutic landscape based on market analyses. New studies revealing the role of acid-sensitive cardiac ion channels and other proton-gated ion channels in cardiac ischaemia are providing renewed interest in pre- and post-conditioning agents with novel mechanisms of action that may also have implications for gene- and cell-based therapeutics. Furthermore, we present guidelines that couple new cell technologies and data resources with traditional animal modelling pipelines to help de-risk drug candidates aimed at treating AMI. We propose that improved preclinical pipelines and increased investment in drug target identification for AMI is critical to stem the increasing global health burden of heart failure.
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Affiliation(s)
- Yuanzhao Cao
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia
| | - Meredith A Redd
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia
| | - Chen Fang
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia
| | - Dalia Mizikovsky
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia
| | - Xichun Li
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia
| | - Peter S Macdonald
- Cardiopulmonary Transplant Unit, St Vincent's Hospital, Sydney, NSW, Australia
| | - Glenn F King
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia; Australian Research Council Centre of Excellence for Innovations in Peptide and Protein Science, The University of Queensland, Brisbane, Qld, Australia
| | - Nathan J Palpant
- Institute for Molecular Bioscience, The University of Queensland, Brisbane, Qld, Australia.
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14
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Boutaleb AM, Ghafari C, Ungureanu C, Carlier S. Fractional flow reserve and non-hyperemic indices: Essential tools for percutaneous coronary interventions. World J Clin Cases 2023; 11:2123-2139. [PMID: 37122527 PMCID: PMC10131021 DOI: 10.12998/wjcc.v11.i10.2123] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/27/2022] [Revised: 02/22/2023] [Accepted: 03/15/2023] [Indexed: 03/30/2023] Open
Abstract
Hemodynamical evaluation of a coronary artery lesion is an important diagnostic step to assess its functional impact. Fractional flow reserve (FFR) received a class IA recommendation from the European Society of Cardiology for the assessment of angiographically moderate stenosis. FFR evaluation of coronary artery disease offers improvement of the therapeutic strategy, deferring unnecessary procedures for lesions with a FFR > 0.8, improving patients' management and clinical outcome. Post intervention, an optimal FFR > 0.9 post stenting should be reached and > 0.8 post drug eluting balloons. Non-hyperemic pressure ratio measurements have been validated in previous studies with a common threshold of 0.89. They might overestimate the hemodynamic significance of some lesions but remain useful whenever hyperemic agents are contraindicated. FFR remains the gold standard reference for invasive assessment of ischemia. We illustrate this review with two cases introducing the possibility to estimate also non-invasively FFR from reconstructed 3-D angiograms by quantitative flow ratio. We conclude introducing a hybrid approach to intermediate lesions (DFR 0.85-0.95) potentially maximizing clinical decision from all measurements.
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Affiliation(s)
- Amine Mamoun Boutaleb
- Department of Cardiology, Ibn Rochd University Hospital, Casablanca 20230, Casablanca, Morocco
- Department of Cardiology, Centre Hospitalier Universitaire Ambroise Paré, Mons 7000, Belgium
| | - Chadi Ghafari
- Department of Cardiology, University of Mons, Mons 7000, Belgium
| | - Claudiu Ungureanu
- Department of Cardiology, University of Mons, Mons 7000, Belgium
- Catheterization Unit, Jolimont Hospital, La Louvière 7100, Belgium, Belgium
| | - Stéphane Carlier
- Department of Cardiology, Centre Hospitalier Universitaire Ambroise Paré, Mons 7000, Belgium
- Department of Cardiology, University of Mons, Mons 7000, Belgium
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15
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Cheng P, Wang X, Liu Q, Yang T, Qu H, Zhou H. Extracellular vesicles mediate biological information delivery: A double-edged sword in cardiac remodeling after myocardial infarction. Front Pharmacol 2023; 14:1067992. [PMID: 36909157 PMCID: PMC9992194 DOI: 10.3389/fphar.2023.1067992] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2022] [Accepted: 02/13/2023] [Indexed: 02/24/2023] Open
Abstract
Acute myocardial infarction (AMI) is a severe ischemic disease with high morbidity and mortality worldwide. Maladaptive cardiac remodeling is a series of abnormalities in cardiac structure and function that occurs following myocardial infarction (MI). The pathophysiology of this process can be separated into two distinct phases: the initial inflammatory response, and the subsequent longer-term scar revision that includes the regression of inflammation, neovascularization, and fibrotic scar formation. Extracellular vesicles are nano-sized lipid bilayer vesicles released into the extracellular environment by eukaryotic cells, containing bioinformatic transmitters which are essential mediators of intercellular communication. EVs of different cellular origins play an essential role in cardiac remodeling after myocardial infarction. In this review, we first introduce the pathophysiology of post-infarction cardiac remodeling, as well as the biogenesis, classification, delivery, and functions of EVs. Then, we explore the dual role of these small molecule transmitters delivered by EVs in post-infarction cardiac remodeling, including the double-edged sword of pro-and anti-inflammation, and pro-and anti-fibrosis, which is significant for post-infarction cardiac repair. Finally, we discuss the pharmacological and engineered targeting of EVs for promoting heart repair after MI, thus revealing the potential value of targeted modulation of EVs and its use as a drug delivery vehicle in the therapeutic process of post-infarction cardiac remodeling.
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Affiliation(s)
- Peipei Cheng
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Xinting Wang
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Qian Liu
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Tao Yang
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Huiyan Qu
- Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Cardiovascular Disease, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Hua Zhou
- Institute of Cardiovascular Disease of Integrated Traditional Chinese and Western Medicine, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Branch of National Clinical Research Center for Chinese Medicine Cardiology, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China.,Department of Cardiovascular Disease, Shuguang Hospital Affiliated to Shanghai University of Traditional Chinese Medicine, Shanghai, China
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16
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The insulin receptor family in the heart: new light on old insights. Biosci Rep 2022; 42:231495. [PMID: 35766350 PMCID: PMC9297685 DOI: 10.1042/bsr20221212] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/29/2022] [Revised: 06/20/2022] [Accepted: 06/29/2022] [Indexed: 11/17/2022] Open
Abstract
Insulin was discovered over 100 years ago. Whilst the first half century defined many of the physiological effects of insulin, the second emphasised the mechanisms by which it elicits these effects, implicating a vast array of G proteins and their regulators, lipid and protein kinases and counteracting phosphatases, and more. Potential growth-promoting and protective effects of insulin on the heart emerged from studies of carbohydrate metabolism in the 1960s, but the insulin receptors (and the related receptor for insulin-like growth factors 1 and 2) were not defined until the 1980s. A related third receptor, the insulin receptor-related receptor remained an orphan receptor for many years until it was identified as an alkali-sensor. The mechanisms by which these receptors and the plethora of downstream signalling molecules confer cardioprotection remain elusive. Here, we review important aspects of the effects of the three insulin receptor family members in the heart. Metabolic studies are set in the context of what is now known of insulin receptor family signalling and the role of protein kinase B (PKB or Akt), and the relationship between this and cardiomyocyte survival versus death is discussed. PKB/Akt phosphorylates numerous substrates with potential for cardioprotection in the contractile cardiomyocytes and cardiac non-myocytes. Our overall conclusion is that the effects of insulin on glucose metabolism that were initially identified remain highly pertinent in managing cardiomyocyte energetics and preservation of function. This alone provides a high level of cardioprotection in the face of pathophysiological stressors such as ischaemia and myocardial infarction.
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17
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Role of Oxidative Stress in Cardiac Dysfunction and Subcellular Defects Due to Ischemia-Reperfusion Injury. Biomedicines 2022; 10:biomedicines10071473. [PMID: 35884777 PMCID: PMC9313001 DOI: 10.3390/biomedicines10071473] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2022] [Revised: 06/15/2022] [Accepted: 06/16/2022] [Indexed: 11/17/2022] Open
Abstract
Ischemia-reperfusion (I/R) injury is well-known to be associated with impaired cardiac function, massive arrhythmias, marked alterations in cardiac metabolism and irreversible ultrastructural changes in the heart. Two major mechanisms namely oxidative stress and intracellular Ca2+-overload are considered to explain I/R-induced injury to the heart. However, it is becoming apparent that oxidative stress is the most critical pathogenic factor because it produces myocardial abnormalities directly or indirectly for the occurrence of cardiac damage. Furthermore, I/R injury has been shown to generate oxidative stress by promoting the formation of different reactive oxygen species due to defects in mitochondrial function and depressions in both endogenous antioxidant levels as well as regulatory antioxidative defense systems. It has also been demonstrated to adversely affect a wide variety of metabolic pathways and targets in cardiomyocytes, various resident structures in myocardial interstitium, as well as circulating neutrophils and leukocytes. These I/R-induced alterations in addition to myocardial inflammation may cause cell death, fibrosis, inflammation, Ca2+-handling abnormalities, activation of proteases and phospholipases, as well as subcellular remodeling and depletion of energy stores in the heart. Analysis of results from isolated hearts perfused with or without some antioxidant treatments before subjecting to I/R injury has indicated that cardiac dysfunction is associated with the development of oxidative stress, intracellular Ca2+-overload and protease activation. In addition, changes in the sarcolemma and sarcoplasmic reticulum Ca2+-handling, mitochondrial oxidative phosphorylation as well as myofibrillar Ca2+-ATPase activities in I/R hearts were attenuated by pretreatment with antioxidants. The I/R-induced alterations in cardiac function were simulated upon perfusing the hearts with oxyradical generating system or oxidant. These observations support the view that oxidative stress may be intimately involved in inducing intracellular Ca2+-overload, protease activation, subcellular remodeling, and cardiac dysfunction as a consequence of I/R injury to the heart.
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18
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An Overview of the Molecular Mechanisms Associated with Myocardial Ischemic Injury: State of the Art and Translational Perspectives. Cells 2022; 11:cells11071165. [PMID: 35406729 PMCID: PMC8998015 DOI: 10.3390/cells11071165] [Citation(s) in RCA: 36] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/02/2022] [Revised: 03/22/2022] [Accepted: 03/24/2022] [Indexed: 02/06/2023] Open
Abstract
Cardiovascular disease is the leading cause of death in western countries. Among cardiovascular diseases, myocardial infarction represents a life-threatening condition predisposing to the development of heart failure. In recent decades, much effort has been invested in studying the molecular mechanisms underlying the development and progression of ischemia/reperfusion (I/R) injury and post-ischemic cardiac remodeling. These mechanisms include metabolic alterations, ROS overproduction, inflammation, autophagy deregulation and mitochondrial dysfunction. This review article discusses the most recent evidence regarding the molecular basis of myocardial ischemic injury and the new potential therapeutic interventions for boosting cardioprotection and attenuating cardiac remodeling.
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19
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Modification of Ischemia/Reperfusion-Induced Alterations in Subcellular Organelles by Ischemic Preconditioning. Int J Mol Sci 2022; 23:ijms23073425. [PMID: 35408783 PMCID: PMC8998910 DOI: 10.3390/ijms23073425] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2022] [Revised: 03/17/2022] [Accepted: 03/18/2022] [Indexed: 02/07/2023] Open
Abstract
It is now well established that ischemia/reperfusion (I/R) injury is associated with the compromised recovery of cardiac contractile function. Such an adverse effect of I/R injury in the heart is attributed to the development of oxidative stress and intracellular Ca2+-overload, which are known to induce remodeling of subcellular organelles such as sarcolemma, sarcoplasmic reticulum, mitochondria and myofibrils. However, repeated episodes of brief periods of ischemia followed by reperfusion or ischemic preconditioning (IP) have been shown to improve cardiac function and exert cardioprotective actions against the adverse effects of prolonged I/R injury. This protective action of IP in attenuating myocardial damage and subcellular remodeling is likely to be due to marked reductions in the occurrence of oxidative stress and intracellular Ca2+-overload in cardiomyocytes. In addition, the beneficial actions of IP have been attributed to the depression of proteolytic activities and inflammatory levels of cytokines as well as the activation of the nuclear factor erythroid factor 2-mediated signal transduction pathway. Accordingly, this review is intended to describe some of the changes in subcellular organelles, which are induced in cardiomyocytes by I/R for the occurrence of oxidative stress and intracellular Ca2+-overload and highlight some of the mechanisms for explaining the cardioprotective effects of IP.
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20
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Stanley A, Athanasuleas C, Nanda N. Paradoxical Septal Motion after Uncomplicated Cardiac Surgery: A Consequence of Altered Regional Right Ventricular Contractile Patterns. Curr Cardiol Rev 2022; 18:e060122200068. [PMID: 34994332 PMCID: PMC9893138 DOI: 10.2174/1573403x18666220106115117] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/31/2021] [Revised: 11/18/2021] [Accepted: 11/24/2021] [Indexed: 11/22/2022] Open
Abstract
Paroxysmal interventricular septal motion (PSM) is the movement of the septum toward the right ventricle (RV) during cardiac systole. It occurs frequently after uncomplicated cardiac surgery (CS), including coronary bypass (on-pump and off-pump), valve repair or replacement, and with all types of incisions (sternotomy or mini-thoracotomy). It sometimes resolves quickly but may persist for months or become permanent. Global RV systolic function, stroke volume and ejection fraction remain normal after uncomplicated CS, but regional contractile patterns are altered. There is a decrease in longitudinal shortening but an increase in transverse shortening in the endocardial and epicardial right ventricular muscle fibers, respectively. PSM is a secondary event as there is no loss of septal perfusion or thickening. The increased RV transverse shortening (free wall to septal fibers) may modify septal movement resulting in PSM that compensates for the reduced RV longitudinal shortening, thus preserving normal global right ventricular function.
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Affiliation(s)
- Alfred Stanley
- Cardiovascular Associates of the Southeast, Birmingham AL and Kemp-Carraway Heart Institute, Birmingham AL, USA
| | - Constantine Athanasuleas
- Department of Surgery, Section of Cardiothoracic Surgery, University of Alabama at Birmingham, Birmingham, AL and Kemp-Carraway Heart Institute, Birmingham AL, USA
| | - Navin Nanda
- Division of Cardiovascular Disease, Department of Medicine, University of Alabama at Birmingham, Birmingham AL, USA
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21
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Venkatesh R, Jayadev C, Sridharan A, Pereira A, Reddy NG, Cherry JP, Yadav NK, Chhablani J. Internal limiting membrane detachment in acute central retinal artery occlusion: a novel prognostic sign seen on OCT. Int J Retina Vitreous 2021; 7:51. [PMID: 34479634 PMCID: PMC8418027 DOI: 10.1186/s40942-021-00323-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2021] [Accepted: 08/26/2021] [Indexed: 12/03/2022] Open
Abstract
Background To present a series of acute central retinal artery occlusion (CRAO) cases showing internal limiting membrane detachment (ILMD) on optical coherence tomography (OCT) and to describe the possible etiopathogenesis and outcomes associated with it. Methods Demographic and OCT features of patients with acute CRAO were analysed retrospectively. OCT parameters noted were posterior vitreous opacities, ILMD, inner retinal layer stratification, hyperreflectivity and thickening, cystoid macular edema, neurosensory detachment. Eyes were grouped into Group (1) CRAO with ILMD; Group (2) CRAO with no ILMD. Results A total of 28 eyes of acute CRAO who had undergone OCT scans at the time of the acute episode were identified. Out of these, ILMD was noted in 5 eyes. The study findings suggested that cases of acute CRAO with ILMD are associated with poor presenting visual acuity and have more severe signs of retinal hypoperfusion on OCT, like inner retinal thickening, inner retinal hyperreflectivity and loss of inner retinal layer stratification. Patients with ILMD have poor final visual acuity and thinning and atrophy or necrosis of the inner retinal layers. Conclusion ILMD can occur in acute CRAO due to total retinal artery occlusion and severe retinal hypoperfusion. The presence of ILMD on OCT can be considered a sign of poor prognosis in cases of acute CRAO. Trial registration: Not applicable.
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Affiliation(s)
- Ramesh Venkatesh
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India.
| | - Chaitra Jayadev
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Akhila Sridharan
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Arpitha Pereira
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Nikitha Gurram Reddy
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Jophy Philip Cherry
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Naresh Kumar Yadav
- Dept. of Retina and Vitreous, Narayana Nethralaya, #121/C, 1st R Block, Chord road, Rajaji Nagar, Bengaluru, 560010, Karnataka, India
| | - Jay Chhablani
- Medical Retina and Vitreoretinal Surgery, University of Pittsburgh School of Medicine, 203 Lothrop Street, Suite 800, Pittsburg, PA, 15213, USA
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22
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Oyama Y, Walker LA, Eckle T. Targeting circadian PER2 as therapy in myocardial ischemia and reperfusion injury. Chronobiol Int 2021; 38:1262-1273. [PMID: 34034593 PMCID: PMC8355134 DOI: 10.1080/07420528.2021.1928160] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2021] [Revised: 04/30/2021] [Accepted: 05/04/2021] [Indexed: 01/22/2023]
Abstract
The cycle of day and night dominates life on earth. Therefore, almost all living organisms adopted a molecular clock linked to the light-dark cycles. It is now well established that this molecular clock is crucial for human health and wellbeing. Disruption of the molecular clockwork directly results in a myriad of disorders, including cardiovascular diseases. Further, the onset of many cardiovascular diseases such as acute myocardial infarction exhibits a circadian periodicity with worse outcomes in the early morning hours. Based on these observations, the research community became interested in manipulating the molecular clock to treat cardiovascular diseases. In recent years, several exciting discoveries of pharmacological agents or molecular mechanisms targeting the molecular clockwork have paved the way for circadian medicine's arrival in cardiovascular diseases. The current review will outline the most recent circadian therapeutic advances related to the circadian rhythm protein Period2 (PER2) to treat myocardial ischemia and summarize future research in the respective field.
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Affiliation(s)
- Yoshimasa Oyama
- Department of Anesthesiology, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Anesthesiology and Intensive Care Medicine, Oita University Faculty of Medicine, Oita, Japan
| | - Lori A Walker
- Division of Cardiology, Department of Medicine, University of Colorado Anschutz Medical Campus, Aurora, Colorado, USA
| | - Tobias Eckle
- Department of Anesthesiology, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
- Department of Cell and Developmental Biology, University of Colorado Denver School of Medicine, Aurora, Colorado, USA
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Abstract
Cardiomyogenesis, the process by which the body generates cardiomyocytes, is poorly understood. We have recently shown that Sfrp2 promotes cardiomyogenesis in vitro. The objective of this study was to determine if Sfrp2 would similarly promote cardiomyogenesis in vivo. To test this hypothesis, we tracked multipotent cKit(+) cells in response to Sfrp2 treatment. In control adult mice, multipotent cKit(+) cells typically differentiated into endothelial cells but not cardiomyocytes. In contrast, Sfrp2 switched the fate of these cells. Following Sfrp2 injection, multipotent cKit(+) cells differentiated solely into cardiomyocytes. Sfrp2-derived cardiomyocytes integrated into the myocardium and exhibited identical physiological properties to preexisting native cardiomyocytes. The ability of Sfrp2 to promote cardiomyogenesis was further supported by tracking EdU-labeled cells. In addition, Sfrp2 did not promote the formation of new cardiomyocytes when the cKit(+) cell population was selectively ablated in vivo using a diphtheria toxin receptor-diphtheria toxin model. Notably, Sfrp2-induced cardiomyogenesis was associated with significant functional improvements in a cardiac injury model. In summary, our study further demonstrates the importance of Sfrp2 in cardiomyogenesis.
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Demeekul K, Suthammarak W, Petchdee S. Bioactive Compounds from Germinated Brown Rice Protect Cardiomyocytes Against Simulated Ischemic/Reperfusion Injury by Ameliorating Mitochondrial Dysfunction. DRUG DESIGN DEVELOPMENT AND THERAPY 2021; 15:1055-1066. [PMID: 33727794 PMCID: PMC7955705 DOI: 10.2147/dddt.s294779] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/16/2020] [Accepted: 02/04/2021] [Indexed: 01/11/2023]
Abstract
Purpose Ischemic/reperfusion (I/R) injury is the principal mechanism during Ischemic Heart Disease (IHD). The key modulator of I/R injury is dysregulation of mitochondria function. Germinated Brown Rice (GBR) has been recommended as a bio-functional food and has clarified the potential properties in several effects. However, the effect of GBR mediated cardioprotective properties, focusing on mitochondrial function’s role, remains unexplored. Thus, this study aims to investigate the cardioprotective effects of GBR pretreatment against simulated I/R injury. Methods H9c2 cardiomyocytes were incubated with GBR at a five ƞg/mL concentration for 24 hours and simulated I/R (sI/R) for 40 minutes. Cell viability and cell apoptosis were assessed by 7-AAD staining and Annexin V/PI staining, respectively. The mitochondrial membrane potential was determined by JC-1 staining and mitochondrial respiration represented by oxygen consumption rate (OCR) using Seahorse Flux analyzer. Results The results revealed that the administration of GBR before sI/R significantly decreased the percentage of cell death and total cell apoptosis in H9c2 during stimulation of ischemic/reperfusion. Besides, pretreatment of cardiomyocytes with GBR remarkably stabilized mitochondrial membrane potential and improved impaired mitochondrial respiration in simulated-H9c2 injury. Conclusion The present research is the first study to report the effective cardioprotection of GBR. Pretreatment of GBR potentially protects H9c2 cardiomyocytes against sI/R injury through mitochondrial function. The underlying therapeutic activities are possibly associated with its bio-functional compounds. However, the underlying mechanism on the cardioprotective effects of GBR needs further studies.
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Affiliation(s)
- Kanokwan Demeekul
- Graduate School, Program of Bio-Veterinary Science, Kasetsart University, Kamphaeng Saen, Nakorn Pathom, Thailand
| | - Wichit Suthammarak
- Department of Biochemistry, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok, Thailand
| | - Soontaree Petchdee
- Department of Large Animal and Wildlife Clinical Sciences, Faculty of Veterinary Medicine, Kasetsart University, Kamphaeng Saen Campus, Nakorn Pathom, Thailand
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The effects of amantadine on lung tissue in lower limb ischemia/reperfusion injury model in rats. TURK GOGUS KALP DAMAR CERRAHISI DERGISI-TURKISH JOURNAL OF THORACIC AND CARDIOVASCULAR SURGERY 2021; 29:77-83. [PMID: 33768984 PMCID: PMC7970070 DOI: 10.5606/tgkdc.dergisi.2021.19884] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Accepted: 06/04/2020] [Indexed: 11/21/2022]
Abstract
Background
This study aims to evaluate the effect of amantadine on lung tissue of after lower limb ischemia/reperfusion injury in rats.
Methods
A total of 24 Wistar rats were divided into four equal groups including six rats in each: sham group (Group S), amantadine group (Group A), ischemia/reperfusion group (Group I/R), and ischemia/reperfusion + amantadine group (Group I/R-A). All groups underwent a midline abdominal incision. In Groups I/R and I/R-A, the infrarenal abdominal aorta was clamped for 120 min and, then, reperfused for 120 min after removal of the clamp. Amantadine hydrochloride 45 mg/kg was administered intraperitoneally to the rats of Groups A and Group I/R-A 15 min before surgery. At the end of reperfusion period (240 min), all rats were sacrificed, and their lung tissues were obtained. Lung tissue catalase and superoxide dismutase activities and glutathione S-transferase and malondialdehyde levels were analyzed. Lung tissues were examined histopathologically.
Results
Catalase activity was lower in Groups A, I/R, and I/R-A compared to Group S. Superoxide dismutase activity was higher in Group I/R than Group S. Superoxide dismutase activity in Groups I/R-A and A decreased, compared to Groups S and I/R. Glutathione S-transferase levels decreased in Groups I/R and A, compared to Group S. Glutathione S-transferase levels in Group I/R-A were higher than Groups I/R and A. The highest level of malondialdehyde was found in Group I/R and the lowest level was found in Group I/R-A. According to histopathological examination, infiltration scores were significantly lower in Group S than Groups I/R and I/R-A (p=0.009 and p=0.011, respectively). The alveolar wall thickening scores in Group I/R were also significantly higher than Groups S and Group A (p=0.001 and p=0.001, respectively).
Conclusion
Lung tissue can be affected histopathologically by ischemia/ reperfusion injury and this injury can be reversed by amantadine administration.
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Singh S, Mabalirajan U. Mitochondrial calcium in command of juggling myriads of cellular functions. Mitochondrion 2021; 57:108-118. [PMID: 33412334 DOI: 10.1016/j.mito.2020.12.011] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2020] [Revised: 12/14/2020] [Accepted: 12/30/2020] [Indexed: 02/07/2023]
Abstract
The puzzling traits related to the evolutionary aspect of mitochondria, still positions the mitochondrion at the center of the research. The theory of endosymbiosis popularized by Lynn Margulis in 1967 gained prominence wherein the mitochondrion is believed to have emerged as a prokaryote and later integrated into the eukaryotic system. This semi-autonomous organelle has bagged two responsible but perilous cellular functions: a) energy metabolism, and b) calcium buffering, though both are interdependent. While most of the mitochondrial functions are saliently regulated by calcium ions, the calcium buffering role of mitochondria decides the cellular fate. Though calcium overload in few mitochondria makes them dysfunctional at the early stage of cellular stress, this doesn't lead to sudden cell death due to critical checkpoints like mitophagy, mitochondrial fusion, etc. Thus, mitochondrion juggles with multiple crucial cellular functions with its calcium buffering skill.
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Affiliation(s)
- Sabita Singh
- Molecular Pathobiology Of Respiratory Diseases, Cell Biology and Physiology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India
| | - Ulaganathan Mabalirajan
- Molecular Pathobiology Of Respiratory Diseases, Cell Biology and Physiology Division, CSIR-Indian Institute of Chemical Biology, Kolkata, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, India.
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Saeb-Parsy K, Martin JL, Summers DM, Watson CJE, Krieg T, Murphy MP. Mitochondria as Therapeutic Targets in Transplantation. Trends Mol Med 2020; 27:185-198. [PMID: 32952044 DOI: 10.1016/j.molmed.2020.08.001] [Citation(s) in RCA: 40] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2020] [Revised: 07/09/2020] [Accepted: 08/03/2020] [Indexed: 12/23/2022]
Abstract
Advances in surgical procedures, technology, and immune suppression have transformed organ transplantation. However, the metabolic changes that occur during organ retrieval, storage, and implantation have been relatively neglected since the developments many decades ago of cold storage organ preservation solutions. In this review we discuss how the metabolic changes that occur within the organ during transplantation, particularly those associated with mitochondria, may contribute to the outcome. We show how a better understanding of these processes can lead to changes in surgical practice and the development of new drug classes to improve the function and longevity of transplanted grafts, while increasing the pool of organs available for transplantation.
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Affiliation(s)
- Kourosh Saeb-Parsy
- Department of Surgery and Cambridge National Institute for Health Research (NIHR) Biomedical Research Centre, Biomedical Campus, University of Cambridge, Cambridge, CB2 2QQ, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, Cambridge Biomedical Campus, Cambridge, UK
| | - Jack L Martin
- Department of Surgery and Cambridge National Institute for Health Research (NIHR) Biomedical Research Centre, Biomedical Campus, University of Cambridge, Cambridge, CB2 2QQ, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, Cambridge Biomedical Campus, Cambridge, UK
| | - Dominic M Summers
- Department of Surgery and Cambridge National Institute for Health Research (NIHR) Biomedical Research Centre, Biomedical Campus, University of Cambridge, Cambridge, CB2 2QQ, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, Cambridge Biomedical Campus, Cambridge, UK
| | - Christopher J E Watson
- Department of Surgery and Cambridge National Institute for Health Research (NIHR) Biomedical Research Centre, Biomedical Campus, University of Cambridge, Cambridge, CB2 2QQ, UK; NIHR Blood and Transplant Research Unit in Organ Donation and Transplantation, Cambridge Biomedical Campus, Cambridge, UK
| | - Thomas Krieg
- Department of Medicine, University of Cambridge, Cambridge, CB2 0QQ, UK
| | - Michael P Murphy
- Department of Medicine, University of Cambridge, Cambridge, CB2 0QQ, UK; Medical Research Council (MRC) Mitochondrial Biology Unit, Biomedical Campus, University of Cambridge, Cambridge CB2 0XY, UK.
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Lloyd SG, Farris GR. MRI Apparent Diffusion Coefficient in Reperfused Acute Myocardial Infarction: New Use of an Old Technique. Radiology 2020; 295:550-551. [DOI: 10.1148/radiol.2020200495] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
- Steven G. Lloyd
- From the Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, 1808 7th Ave S, Birmingham, AL 35294; and Birmingham VA Medical Center, Birmingham, Ala
| | - G. Ross Farris
- From the Department of Medicine, Division of Cardiovascular Disease, University of Alabama at Birmingham, 1808 7th Ave S, Birmingham, AL 35294; and Birmingham VA Medical Center, Birmingham, Ala
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Implications of the complex biology and micro-environment of cardiac sarcomeres in the use of high affinity troponin antibodies as serum biomarkers for cardiac disorders. J Mol Cell Cardiol 2020; 143:145-158. [PMID: 32442660 PMCID: PMC7235571 DOI: 10.1016/j.yjmcc.2020.05.010] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/22/2020] [Revised: 05/15/2020] [Accepted: 05/16/2020] [Indexed: 02/06/2023]
Abstract
Cardiac troponin I (cTnI), the inhibitory-unit, and cardiac troponin T (cTnT), the tropomyosin-binding unit together with the Ca-binding unit (cTnC) of the hetero-trimeric troponin complex signal activation of the sarcomeres of the adult cardiac myocyte. The unique structure and heart myocyte restricted expression of cTnI and cTnT led to their worldwide use as biomarkers for acute myocardial infarction (AMI) beginning more than 30 years ago. Over these years, high sensitivity antibodies (hs-cTnI and hs-cTnT) have been developed. Together with careful determination of history, physical examination, and EKG, determination of serum levels using hs-cTnI and hs-cTnT permits risk stratification of patients presenting in the Emergency Department (ED) with chest pain. With the ability to determine serum levels of these troponins with high sensitivity came the question of whether such measurements may be of diagnostic and prognostic value in conditions beyond AMI. Moreover, the finding of elevated serum troponins in physiological states such as exercise and pathological states where cardiac myocytes may be affected requires understanding of how troponins may be released into the blood and whether such release may be benign. We consider these questions by relating membrane stability to the complex biology of troponin with emphasis on its sensitivity to the chemo-mechanical and micro-environment of the cardiac myocyte. We also consider the role determinations of serum troponins play in the precise phenotyping in personalized and precision medicine approaches to promote cardiac health. Serum levels of cardiac TnI and cardiac TnT permit stratification of patients with chest pain. Release of troponins into blood involves not only frank necrosis but also programmed necroptosis. Genome wide analysis of serum troponin levels in the general population may be prognostic about cardiovascular health. Significant levels of serum troponins with exhaustive exercise may not be benign. Troponin in serum can lead to important data related to personalized and precision medicine.
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Qi M, He L, Ma X, Li Z. MiR-181a-5p is involved in the cardiomyocytes apoptosis induced by hypoxia-reoxygenation through regulating SIRT1. Biosci Biotechnol Biochem 2020; 84:1353-1361. [PMID: 32290769 DOI: 10.1080/09168451.2020.1750943] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/15/2022]
Abstract
MiR-181a-5p's mechanism in hypoxia-reoxygenation (H/R)-induced cardiomyocytes apoptosis has not been clarified. This study verified that SIRT1 was the target of miR-181a-5p. MiR-181a-5p expression was up-regulated or down-regulated in H/R-induced cardiomyocytes, and SIRT1 was transfected into cells alone or in combination with miR-181a-5p. Cell viability, apoptosis, levels of released lactate dehydrogenase (LDH), malondialdehyde (MDA), and superoxide dismutase (SOD), as well as the Bcl-2, Bax, and Caspase 3 levels in treated cells were tested. On the one hand, down-regulated miR-181a-5p promoted cell viability, reduced released LDH and MDA, and increased SOD level in H/R-induced cardiomyocytes. On the other hand, miR-181a-5p inhibited apoptosis and elevated Bcl-2 expression while decreasing the expressions of Bax and Caspase 3 in treated cells, but the effects of miR-181a-5p could be rescued by SIRT1. In conclusion, miR-181a-5p involved in H/R-induced cardiomyocytes apoptosis through regulating SIRT1, which might become a novel direction for related diseases.
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Affiliation(s)
- Mingxu Qi
- Department of Cardiovascular Medicine, Affiliated Nanhua Hospital, University of South China , Hengyang, Hunan, China
| | - Li He
- Department of Psychiatry, Hengyang Second People's Hospital , Hengyang, Hunan, China
| | - Xiaofeng Ma
- Department of Cardiovascular Medicine, Affiliated Nanhua Hospital, University of South China , Hengyang, Hunan, China
| | - Zili Li
- Department of Cardiovascular Medicine, Affiliated Nanhua Hospital, University of South China , Hengyang, Hunan, China
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Kulek AR, Anzell A, Wider JM, Sanderson TH, Przyklenk K. Mitochondrial Quality Control: Role in Cardiac Models of Lethal Ischemia-Reperfusion Injury. Cells 2020; 9:cells9010214. [PMID: 31952189 PMCID: PMC7016592 DOI: 10.3390/cells9010214] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2019] [Revised: 01/10/2020] [Accepted: 01/12/2020] [Indexed: 02/07/2023] Open
Abstract
The current standard of care for acute myocardial infarction or 'heart attack' is timely restoration of blood flow to the ischemic region of the heart. While reperfusion is essential for the salvage of ischemic myocardium, re-introduction of blood flow paradoxically kills (rather than rescues) a population of previously ischemic cardiomyocytes-a phenomenon referred to as 'lethal myocardial ischemia-reperfusion (IR) injury'. There is long-standing and exhaustive evidence that mitochondria are at the nexus of lethal IR injury. However, during the past decade, the paradigm of mitochondria as mediators of IR-induced cardiomyocyte death has been expanded to include the highly orchestrated process of mitochondrial quality control. Our aims in this review are to: (1) briefly summarize the current understanding of the pathogenesis of IR injury, and (2) incorporating landmark data from a broad spectrum of models (including immortalized cells, primary cardiomyocytes and intact hearts), provide a critical discussion of the emerging concept that mitochondrial dynamics and mitophagy (the components of mitochondrial quality control) may contribute to the pathogenesis of cardiomyocyte death in the setting of ischemia-reperfusion.
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Affiliation(s)
- Andrew R. Kulek
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA; (A.R.K.); (A.A.); (T.H.S.)
- Department of Biochemistry, Microbiology and Immunology, Wayne State University School of Medicine, Detroit, MI 48201, USA
| | - Anthony Anzell
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA; (A.R.K.); (A.A.); (T.H.S.)
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Departments of Emergency Medicine and Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA;
| | - Joseph M. Wider
- Departments of Emergency Medicine and Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA;
| | - Thomas H. Sanderson
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA; (A.R.K.); (A.A.); (T.H.S.)
- Departments of Emergency Medicine and Molecular & Integrative Physiology, University of Michigan Medical School, Ann Arbor, MI 48109, USA;
| | - Karin Przyklenk
- Cardiovascular Research Institute, Wayne State University School of Medicine, Detroit, MI 48201, USA; (A.R.K.); (A.A.); (T.H.S.)
- Department of Physiology, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Department of Emergency Medicine, Wayne State University School of Medicine, Detroit, MI 48201, USA
- Correspondence: ; Tel.: +1-313-577-9047
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Irion CI, Martins EL, Christie MLA, de Andrade CBV, de Moraes ACN, Ferreira RP, Pimentel CF, Suhett GD, de Carvalho ACC, Lindoso RS, Vieyra A, Galina A, Goldenberg RCS. Acute Myocardial Infarction Reduces Respiration in Rat Cardiac Fibers, despite Adipose Tissue Mesenchymal Stromal Cell Transplant. Stem Cells Int 2020; 2020:4327965. [PMID: 32655647 PMCID: PMC7322589 DOI: 10.1155/2020/4327965] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2019] [Revised: 03/02/2020] [Accepted: 03/18/2020] [Indexed: 02/08/2023] Open
Abstract
Adipose-derived mesenchymal stromal cell (AD-MSC) administration improves cardiac function after acute myocardial infarction (AMI). Although the mechanisms underlying this effect remain to be elucidated, the reversal of the mitochondrial dysfunction may be associated with AMI recovery. Here, we analyzed the alterations in the respiratory capacity of cardiomyocytes in the infarcted zone (IZ) and the border zone (BZ) and evaluated if mitochondrial function improved in cardiomyocytes after AD-MSC transplantation. Female rats were subjected to AMI by permanent left anterior descending coronary (LAD) ligation and were then treated with AD-MSCs or PBS in the border zone (BZ). Cardiac fibers were analyzed 24 hours (necrotic phase) and 8 days (fibrotic phase) after AMI for mitochondrial respiration, citrate synthase (CS) activity, F0F1-ATPase activity, and transmission electron microscopy (TEM). High-resolution respirometry of permeabilized cardiac fibers showed that AMI reduced numerous mitochondrial respiration parameters in cardiac tissue, including phosphorylating and nonphosphorylating conditions, respiration coupled to ATP synthesis, and maximal respiratory capacity. CS decreased in IZ and BZ at the necrotic phase, whereas it recovered in BZ and continued to drop in IZ over time when compared to Sham. Exogenous cytochrome c doubled respiration at the necrotic phase in IZ. F0F1-ATPase activity decreased in the BZ and, to more extent, in IZ in both phases. Transmission electron microscopy showed disorganized mitochondrial cristae structure, which was more accentuated in IZ but also important in BZ. All these alterations in mitochondrial respiration were still present in the group treated with AD-MSC. In conclusion, AMI led to mitochondrial dysfunction with oxidative phosphorylation disorders, and AD-MSC improved CS temporarily but was not able to avoid alterations in mitochondria function over time.
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Affiliation(s)
- Camila I. Irion
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Eduarda L. Martins
- 2Leopoldo de Meis Institute of Medical Biochemistry, Federal University of Rio de Janeiro, 21941-902, Brazil
| | - Michelle L. A. Christie
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Cherley B. V. de Andrade
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Alan C. N. de Moraes
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Raphaela P. Ferreira
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Cibele F. Pimentel
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Grazielle D. Suhett
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Antonio Carlos C. de Carvalho
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 3National Center for Structural Biology and Bioimaging (CENABIO), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 4National Institute of Science and Technology for Regenerative Medicine-REGENERA, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Rafael S. Lindoso
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 4National Institute of Science and Technology for Regenerative Medicine-REGENERA, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
| | - Adalberto Vieyra
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 3National Center for Structural Biology and Bioimaging (CENABIO), Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 4National Institute of Science and Technology for Regenerative Medicine-REGENERA, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
- 5Regenerative Medicine Program, Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
| | - Antonio Galina
- 2Leopoldo de Meis Institute of Medical Biochemistry, Federal University of Rio de Janeiro, 21941-902, Brazil
| | - Regina C. S. Goldenberg
- 1Carlos Chagas Filho Institute of Biophysics, Federal University of Rio de Janeiro, Rio de Janeiro 21941-902, Brazil
- 4National Institute of Science and Technology for Regenerative Medicine-REGENERA, Federal University of Rio de Janeiro, Rio de Janeiro, Brazil
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Induced cardiac pacemaker cells survive metabolic stress owing to their low metabolic demand. Exp Mol Med 2019; 51:1-12. [PMID: 31519870 PMCID: PMC6802647 DOI: 10.1038/s12276-019-0303-6] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2019] [Revised: 05/07/2019] [Accepted: 05/14/2019] [Indexed: 11/29/2022] Open
Abstract
Cardiac pacemaker cells of the sinoatrial node initiate each and every heartbeat. Compared with our understanding of the constituents of their electrical excitation, little is known about the metabolic underpinnings that drive the automaticity of pacemaker myocytes. This lack is largely owing to the scarcity of native cardiac pacemaker myocytes. Here, we take advantage of induced pacemaker myocytes generated by TBX18-mediated reprogramming (TBX18-iPMs) to investigate comparative differences in the metabolic program between pacemaker myocytes and working cardiomyocytes. TBX18-iPMs were more resistant to metabolic stresses, exhibiting higher cell viability upon oxidative stress. TBX18-induced pacemaker myocytes (iPMs) expensed a lower degree of oxidative phosphorylation and displayed a smaller capacity for glycolysis compared with control ventricular myocytes. Furthermore, the mitochondria were smaller in TBX18-iPMs than in the control. We reasoned that a shift in the balance between mitochondrial fusion and fission was responsible for the smaller mitochondria observed in TBX18-iPMs. We identified a mitochondrial inner membrane fusion protein, Opa1, as one of the key mediators of this process and demonstrated that the suppression of Opa1 expression increases the rate of synchronous automaticity in TBX18-iPMs. Taken together, our data demonstrate that TBX18-iPMs exhibit a low metabolic demand that matches their mitochondrial morphology and ability to withstand metabolic insult. The heart’s pacemaker cells contain mitochondria that are smaller than average and require less energy than other heart cells, properties that help make them naturally resilient to stress. Cardiac pacemaker cells constitute a tiny proportion of the heart’s cells, yet play a critical role in maintaining a steady heartbeat. However, quite how pacemaker cells maintain their automatic rhythm is unclear because their scarcity makes them difficult to study. To examine the cells’ metabolic state further, Hee Cheol Cho at Emory University, Atlanta, and Brian Foster at Johns Hopkins University School of Medicine, Baltimore, and co-workers therefore induced pacemaker cells by adding an embryonic protein to heart muscle cells. The induced pacemaker cells survived well under oxidative stress. The team identified a protein in the pacemakers’ mitochondrial membranes, the expression of which directly influences rhythm responses.
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Liu Y, Zou J, Liu X, Zhang Q. MicroRNA-138 attenuates myocardial ischemia reperfusion injury through inhibiting mitochondria-mediated apoptosis by targeting HIF1-α. Exp Ther Med 2019; 18:3325-3332. [PMID: 31602205 PMCID: PMC6777330 DOI: 10.3892/etm.2019.7976] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Accepted: 03/26/2019] [Indexed: 02/06/2023] Open
Abstract
Myocardial ischemia-reperfusion (I/R) injury is considered to have a detrimental role in coronary heart disease, which is considered to be the leading cause of death worldwide. However, the molecular mechanism involved in the progression of myocardial I/R injury is still unclear. The current study aimed to investigate the expression and function of microRNA (miR)-138 in the process of myocardial I/R injury. First, miR-138 expression levels were analyzed both in myocardium with I/R injury and control myocardium using reverse transcription-quantitative polymerase chain reaction analysis. Then, the relationship between the levels of miR-138 and hypoxia-inducible factor (HIF)1-α was also investigated using a luciferase reporter assay. Assessment of myocardial infarct size, measurements of serum myocardial enzymes and electron microscopy analysis were all utilized to analyse the effect of miR-138 on myocardial I/R injury. The authors of current study also used western blotting to examine the expression levels of the mitochondrial fission-related proteins dynamin-1-like protein and mitochondrial fission 1 protein. It was found that miR-138 is downregulated and HIF1-α is upregulated after myocardial ischemia reperfusion injury. Overexpression of miR-138 reduced myocardial I/R injury-induced infarct sizes and myocardial enzyme levels, and it also inhibited the expression of proteins related to mitochondrial morphology and myocardial I/R-induced mitochondrial apoptosis by targeting HIF1-α. Taken together, these findings provide a novel insight into the molecular mechanism of miR-138 and HIF1-α in the progression of myocardial I/R injury. miR-138 has the potential to become a promising therapeutic target for treating myocardial I/R injury.
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Affiliation(s)
- Yan Liu
- The First Ward, Department of Cardiology, Rizhao People's Hospital, Rizhao, Shandong 276800, P.R. China
| | - Jianfeng Zou
- The Third Ward, Department of Cardiology, Rizhao People's Hospital, Rizhao, Shandong 276800, P.R. China
| | - Xiaoyan Liu
- The First Ward, Department of Cardiology, Rizhao People's Hospital, Rizhao, Shandong 276800, P.R. China
| | - Quan Zhang
- Department of Cardiology, Affiliated Hospital of Weifang Medical University, Weifang, Shandong 260141, P.R. China
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See Hoe LE, Bartnikowski N, Wells MA, Suen JY, Fraser JF. Hurdles to Cardioprotection in the Critically Ill. Int J Mol Sci 2019; 20:E3823. [PMID: 31387264 PMCID: PMC6695809 DOI: 10.3390/ijms20153823] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2019] [Revised: 07/26/2019] [Accepted: 08/03/2019] [Indexed: 02/07/2023] Open
Abstract
Cardiovascular disease is the largest contributor to worldwide mortality, and the deleterious impact of heart failure (HF) is projected to grow exponentially in the future. As heart transplantation (HTx) is the only effective treatment for end-stage HF, development of mechanical circulatory support (MCS) technology has unveiled additional therapeutic options for refractory cardiac disease. Unfortunately, despite both MCS and HTx being quintessential treatments for significant cardiac impairment, associated morbidity and mortality remain high. MCS technology continues to evolve, but is associated with numerous disturbances to cardiac function (e.g., oxidative damage, arrhythmias). Following MCS intervention, HTx is frequently the destination option for survival of critically ill cardiac patients. While effective, donor hearts are scarce, thus limiting HTx to few qualifying patients, and HTx remains correlated with substantial post-HTx complications. While MCS and HTx are vital to survival of critically ill cardiac patients, cardioprotective strategies to improve outcomes from these treatments are highly desirable. Accordingly, this review summarizes the current status of MCS and HTx in the clinic, and the associated cardiac complications inherent to these treatments. Furthermore, we detail current research being undertaken to improve cardiac outcomes following MCS/HTx, and important considerations for reducing the significant morbidity and mortality associated with these necessary treatment strategies.
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Affiliation(s)
- Louise E See Hoe
- Critical Care Research Group, The Prince Charles Hospital, Chermside 4032, Australia.
- Faculty of Medicine, University of Queensland, Chermside 4032, Australia.
| | - Nicole Bartnikowski
- Critical Care Research Group, The Prince Charles Hospital, Chermside 4032, Australia
- Science and Engineering Faculty, Queensland University of Technology, Chermside 4032, Australia
| | - Matthew A Wells
- Critical Care Research Group, The Prince Charles Hospital, Chermside 4032, Australia
- School of Medical Science, Griffith University, Southport 4222, Australia
| | - Jacky Y Suen
- Critical Care Research Group, The Prince Charles Hospital, Chermside 4032, Australia
- Faculty of Medicine, University of Queensland, Chermside 4032, Australia
| | - John F Fraser
- Critical Care Research Group, The Prince Charles Hospital, Chermside 4032, Australia
- Faculty of Medicine, University of Queensland, Chermside 4032, Australia
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Yuan L, Fan L, Li Q, Cui W, Wang X, Zhang Z. Inhibition of miR‐181b‐5p protects cardiomyocytes against ischemia/reperfusion injury by targeting AKT3 and PI3KR3. J Cell Biochem 2019; 120:19647-19659. [PMID: 31297863 DOI: 10.1002/jcb.29271] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2018] [Accepted: 04/08/2019] [Indexed: 12/30/2022]
Affiliation(s)
- Limei Yuan
- College of Acupuncture and Message Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
| | - Lihua Fan
- Departement of Cardiovascular Third Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
| | - Qinghai Li
- Departement of Cardiovascular Third Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
| | - Wei Cui
- Departement of Cardiovascular Third Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
| | - Xuechen Wang
- Departement of Cardiovascular Third Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
| | - Zhiguo Zhang
- Departement of Cardiovascular Third Affiliated Hospital of Henan University of Traditional Chinese Medicine Zhengzhou Henan Province China
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Soliman R, Abukhudair W. The perioperative effect of magnesium sulfate in patients with concentric left ventricular hypertrophy undergoing cardiac surgery: A double-blinded randomized study. Ann Card Anaesth 2019; 22:246-253. [PMID: 31274484 PMCID: PMC6639894 DOI: 10.4103/aca.aca_34_18] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023] Open
Abstract
Objective: The objective of this study was to assess the cardioprotective effect of magnesium sulfate in patients with left ventricular concentric hypertrophy undergoing cardiac surgery. Design: The study was a double-blinded randomized study. Setting: This study was conducted at a cardiac center. Patients: The study included 250 patients. Intervention: The study included two groups (each = 125): Group M – the patients who received magnesium sulfate infusion (15 mg/kg/h). The infusion was started 20 min before induction, during surgery, and the first postoperative 24 h. Group C – the patients who received an equal amount of normal saline. Measurements: The variables included troponin I level, creatinine kinase-MB (CK-MB) level, electrocardiograph (ECG) with automatic ST-segment analysis (leads II and V), E/A peak ratio, end-diastolic volume, cardiac index (CI), heart rate, mean arterial blood pressure (MAP), mean arterial pulmonary pressure (mPAP), pulmonary and systemic vascular resistances, and pharmacological and mechanical support. Main Results: The troponin I level, CK-MB, and ECG changes were lower in Group M than Group C (P < 0.05). The E/A peak ratio and end-diastolic volume increased in Group M than Group C (P < 0.05). There was a significant increase in the CI and a decrease in the heart rate, mPAP, pulmonary vascular resistances, and pharmacological and mechanical support in Group M compared to Group C (P < 0.05). There were minimal changes in the MAP and systemic vascular resistance in Group M compared to Group C (P < 0.05). Conclusion: The magnesium sulfate provides a cardioprotective effect in patients with concentric ventricular hypertrophy undergoing cardiac surgery. It decreases the incidence of perioperative myocardial infarction and arrhythmia. Furthermore, it decreases the requirement of pharmacological and mechanical support.
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Affiliation(s)
- Rabie Soliman
- Department of Anesthesia, Cairo University, Cairo, Egypt; Department of Cardiac Anesthesia, Cardiac Center, King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia
| | - Walid Abukhudair
- Department of Cardiac Surgery, Cardiac Center, King Fahd Armed Forces Hospital, Jeddah, Saudi Arabia
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38
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Hassaan PS, Nassar SZ, Issa Y, Zahran N. Irisin vs. Treadmill Exercise in Post Myocardial Infarction Cardiac Rehabilitation in Rats. Arch Med Res 2019; 50:44-54. [PMID: 31349953 DOI: 10.1016/j.arcmed.2019.05.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/06/2019] [Revised: 05/03/2019] [Accepted: 05/22/2019] [Indexed: 12/15/2022]
Abstract
BACKGROUND Irisin is an exercise-induced myokine that could play a role in post-myocardial infarction (MI) cardiac rehabilitation. AIM OF THE STUDY We investigated the ability of dihydromyricetin to mimic the effects of exercise on raising serum irisin and on enhancing cardiac function and remodeling following MI in rats. METHODS MI was induced in albino rats by subcutaneous injection of isoproterenol (85 mg/kg) for 2 consecutive days at an interval of 24 h. One week post-MI, rats either underwent physical exercise by running on a motor-driven treadmill at 25 m/min, 30 min/d, 5 d/week or received orally dihydromyricetin 100 mg/kg/d, for 8 weeks. RESULTS Exercise and dihydromyricetin raised serum irisin 1.8 and 1.9 folds as compared to sedentary rats (p <0.001) with no difference between both regimens (p = 0.992). There was an improvement of cardiac remodeling where β-myosin heavy chain level was not different in exercise and dihydromyricetin groups from normal group (p = 0.695, p = 0.470). The heart rate variability domains increased back to normal. However, exercise was superior to dihydromyricetin in improving cardiac contractility by increasing carotid blood flow, stroke volume and cardiac output to be insignificant from normal rats (p = 0.899, p = 0.850, p = 0.912). Meanwhile, treatment with dihydromyricetin showed reduction by 29% of carotid blood flow, 24% of stroke volume and 25% of cardiac output compared to normal rats (p <0.001). CONCLUSIONS DHM could mimic the effect of exercise in stimulating irisin secretion but it is not as effective as exercise in improving myocardial contractility.
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Affiliation(s)
- Passainte S Hassaan
- Department of Medical Physiology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Seham Zakaria Nassar
- Department of Medical Physiology, Faculty of Medicine, Alexandria University, Alexandria, Egypt.
| | - Yasmine Issa
- Department of Medical Biochemistry, Faculty of Medicine, Alexandria University, Alexandria, Egypt
| | - Noha Zahran
- Department of Histology and cellular biology, Faculty of Medicine, Alexandria University, Alexandria, Egypt
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Houang EM, Bartos J, Hackel BJ, Lodge TP, Yannopoulos D, Bates FS, Metzger JM. Cardiac Muscle Membrane Stabilization in Myocardial Reperfusion Injury. ACTA ACUST UNITED AC 2019; 4:275-287. [PMID: 31061929 PMCID: PMC6488758 DOI: 10.1016/j.jacbts.2019.01.009] [Citation(s) in RCA: 16] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/04/2019] [Revised: 01/11/2019] [Accepted: 01/26/2019] [Indexed: 12/11/2022]
Abstract
In myocardial ischemia, the integrity of the cardiac sarcolemma is severely stressed in the critical earliest moments upon reperfusion. Bolstering sarcolemma integrity improves myocyte survival. This review focuses on cardiac sarcolemma stability and its role as a therapeutic target in ischemia-reperfusion injury. Synthetic block copolymers have been shown to interface with the muscle membrane to confer membrane stabilization during stress. Integrated multidisciplinary research teams, spanning cardiology, physiology, chemistry, and chemical engineering are essential to guide future mechanistic and translational studies of novel chemical-based membrane stabilizers for preserving viable heart muscle during ischemia-reperfusion injury in human patients.
The phospholipid bilayer membrane that surrounds each cell in the body represents the first and last line of defense for preserving overall cell viability. In several forms of cardiac and skeletal muscle disease, deficits in the integrity of the muscle membrane play a central role in disease pathogenesis. In Duchenne muscular dystrophy, an inherited and uniformly fatal disease of progressive muscle deterioration, muscle membrane instability is the primary cause of disease, including significant heart disease, for which there is no cure or highly effective treatment. Further, in multiple clinical forms of myocardial ischemia-reperfusion injury, the cardiac sarcolemma is damaged and this plays a key role in disease etiology. In this review, cardiac muscle membrane stability is addressed, with a focus on synthetic block copolymers as a unique chemical-based approach to stabilize damaged muscle membranes. Recent advances using clinically relevant small and large animal models of heart disease are discussed. In addition, mechanistic insights into the copolymer-muscle membrane interface, featuring atomistic, molecular, and physiological structure-function approaches are highlighted. Collectively, muscle membrane instability contributes significantly to morbidity and mortality in prominent acquired and inherited heart diseases. In this context, chemical-based muscle membrane stabilizers provide a novel therapeutic approach for a myriad of heart diseases wherein the integrity of the cardiac muscle membrane is at risk.
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Affiliation(s)
- Evelyne M Houang
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Jason Bartos
- Department of Medicine-Cardiovascular Division, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Benjamin J Hackel
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota
| | - Timothy P Lodge
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota.,Department of Chemistry, University of Minnesota, Minneapolis, Minnesota
| | - Demetris Yannopoulos
- Department of Medicine-Cardiovascular Division, University of Minnesota Medical School, Minneapolis, Minnesota
| | - Frank S Bates
- Department of Chemical Engineering and Materials Science, University of Minnesota, Minneapolis, Minnesota
| | - Joseph M Metzger
- Department of Integrative Biology and Physiology, University of Minnesota Medical School, Minneapolis, Minnesota
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40
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Kolukcu E, Kilic S, Parlaktas BS, Erdemir F, Unsal V, Atılgan D, Uluocak N. The effects of oxytocin on penile tissues in experimental priapism model in rats. Int Urol Nephrol 2018; 51:231-238. [PMID: 30515737 DOI: 10.1007/s11255-018-2046-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/14/2018] [Accepted: 11/24/2018] [Indexed: 01/29/2023]
Abstract
PURPOSE This study aimed to demonstrate the effects of oxytocin on penile tissues in ischemia-reperfusion injury developed after priapism. METHODS Forty Wistar Albino strain male rats were divided into four groups. The control group (n = 10) was not intervened. In Group 2, a rat model of priapism was constructed and maintained for 1 h. In Group 3, reperfusion was ensured for 30 min following priapism. Rats in Group 4 rats were given oxytocin 30 min before the induction of reperfusion following priapism. All rats were penectomized, and adequate amounts of blood sample were drawn. Inflammation, vasocongestion, desquamation, and edema in penile tissue were scored between 0 and 3 points (0: normal, 1: mild, 2: moderate, 3: severe) to evaluate the severity of tissue damage. The activities of superoxide dismutase (SOD) and glutathione peroxidase (GSH-Px), and the levels of malondialdehyde (MDA), and nitric oxide (NO) in blood samples were determined spectrophotometrically. RESULTS In histopathological examination, statistically significant positive changes were detected in vasocongestion, inflammation, desquamation, and edema scores in Group 4 than in Group 2 and Group 3 (p < 0.001). Biochemical test results revealed that NO levels were significantly lower in Group 4 than in Group 3 (p < 0.001). Serum GSH-Px activities in Group 4 significantly increased when compared with the other groups 2 and 3 (p = 0.002, p = 0.001, respectively). There was no statistical difference among the groups regarding SOD activities and MDA levels (p > 0.05). CONCLUSIONS Oxytocin protected against priapism-induced ischemia-reperfusion injury developed in cavernosal tissue as observed based on histopathological and biochemical evidence. Although this is an experimental study, oxytocin can be thought as an alternative drug in the treatment of priapism.
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Affiliation(s)
- Engin Kolukcu
- Department of Urology, Tokat State Hospital, Tokat, Turkey.
| | - Sahin Kilic
- Department of Urology, Fethiye State Hospital, Fethiye, Mugla, Turkey
| | - Bekir Suha Parlaktas
- Department of Urology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - Fikret Erdemir
- Department of Urology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - Velid Unsal
- Mardin Artuklu University High School of Health and Central Research Laboratory, Mardin, Turkey
| | - Dogan Atılgan
- Department of Urology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
| | - Nihat Uluocak
- Department of Urology, Faculty of Medicine, Gaziosmanpasa University, Tokat, Turkey
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41
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Boyman L, Williams GSB, Wescott AP, Leach JB, Kao JPY, Lederer WJ. Real-time local oxygen measurements for high resolution cellular imaging. J Mol Cell Cardiol 2018; 127:97-104. [PMID: 30528909 DOI: 10.1016/j.yjmcc.2018.11.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 11/04/2018] [Accepted: 11/29/2018] [Indexed: 12/31/2022]
Abstract
Single-cell metabolic investigations are hampered by the absence of flexible tools to measure local partial pressure of O2 (pO2) at high spatial-temporal resolution. To this end, we developed an optical sensor capable of measuring local pericellular pO2 for subcellular resolution measurements with confocal imaging while simultaneously carrying out electrophysiological and/or chemo-mechanical single cell experiments. Here we present the OxySplot optrode, a ratiometric fluorescent O2-micro-sensor created by adsorbing O2-sensitive and O2-insensitive fluorophores onto micro-particles of silica. To protect the OxySplot optrode from the components and reactants of liquid environment without compromising access to O2, the micro-particles are coated with an optically clear silicone polymer (PDMS, polydimethylsiloxane). The PDMS coated OxySplot micro-particles are used alone or in a thin (~50 μm) PDMS layer of arbitrary shape referred to as the OxyMat. Additional top coatings on the OxyMat (e.g., fibronectin, laminin, polylysine, special photoactivatable surfaces etc.) facilitate adherence of cells. The OxySplots report the cellular pO2 and micro-gradients of pO2 without disrupting the flow of extracellular solutions or interfering with patch-clamp pipettes, mechanical attachments, and micro-superfusion. Since OxySplots and a cell can be imaged and spatially resolved, calibrated changes of pO2 and intracellular events can be imaged simultaneously. In addition, the response-time (t0.5 = 0.7 s, 0-160 mmHg) of OxySplots is ~100 times faster than amperometric Clark-type polarization microelectrodes. Two usage example of OxySplots with cardiomyocytes show (1) OxySplots measuring pericellular pO2 while tetramethylrhodamine methyl-ester (TMRM) was used to measure mitochondrial membrane potential (ΔΨm); and (2) OxySplots measuring pO2 during ischemia and reperfusion while rhod-2 was used to measure cytosolic [Ca2+]i levels simultaneously. The OxySplot/OxyMat optrode system provides an affordable and highly adaptable optical sensor system for monitoring pO2 with a diverse array of imaging systems, including high-speed, high-resolution confocal microscopes while physiological features are measured simultaneously.
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Affiliation(s)
- Liron Boyman
- Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - George S B Williams
- Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Andrew P Wescott
- Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - Jennie B Leach
- Department of Chemical, Biochemical and Environmental Engineering, University of Maryland Baltimore County, Baltimore, MD 21250, USA
| | - Joseph P Y Kao
- Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA
| | - W Jonathan Lederer
- Center for Biomedical Engineering and Technology, University of Maryland School of Medicine, Baltimore, MD 21201, USA; Department of Physiology, University of Maryland School of Medicine, Baltimore, MD 21201, USA.
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van der Weg K, Prinzen FW, Gorgels AP. Editor's Choice- Reperfusion cardiac arrhythmias and their relation to reperfusion-induced cell death. EUROPEAN HEART JOURNAL-ACUTE CARDIOVASCULAR CARE 2018; 8:142-152. [PMID: 30421619 DOI: 10.1177/2048872618812148] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Reperfusion does not only salvage ischaemic myocardium but can also cause additional cell death which is called lethal reperfusion injury. The time of reperfusion is often accompanied by ventricular arrhythmias, i.e. reperfusion arrhythmias. While both conditions are seen as separate processes, recent research has shown that reperfusion arrhythmias are related to larger infarct size. The pathophysiology of fatal reperfusion injury revolves around intracellular calcium overload and reactive oxidative species inducing apoptosis by opening of the mitochondrial protein transition pore. The pathophysiological basis for reperfusion arrhythmias is the same intracellular calcium overload as that causing fatal reperfusion injury. Therefore both conditions should not be seen as separate entities but as one and the same process resulting in two different visible effects. Reperfusion arrhythmias could therefore be seen as a potential marker for fatal reperfusion injury.
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Affiliation(s)
- Kirian van der Weg
- 1 Department of Cardiology, Maastricht University Medical Center, The Netherlands
| | - Frits W Prinzen
- 2 Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, The Netherlands
| | - Anton Pm Gorgels
- 1 Department of Cardiology, Maastricht University Medical Center, The Netherlands.,2 Cardiovascular Research Institute Maastricht (CARIM), Maastricht University, The Netherlands
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43
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Bin-Jaliah I, Hussein AM, Sakr HF, Eid EA. Effects of low dose of aliskiren on isoproterenol-induced acute myocardial infarction in rats. Physiol Int 2018; 105:127-144. [PMID: 29975120 DOI: 10.1556/2060.105.2018.2.11] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
Abstract
This study examined the effects of aliskiren (Ali) (direct renin inhibitor) on serum cardiac enzymes (LDH and CK-MB), electrocardiography (ECG) changes, myocardial oxidative stress markers (MDA, CAT, and GSH) and the expression of Bcl2, HO-1, and Nrf2 genes in isoproterenol (ISO)-induced myocardial infarction (MI). A total of 40 male albino rats were allocated into four groups, (1) normal control (NC) group, (2) Ali group (rats received Ali at 10 mg/kg/day p.o. for 5 days), (3) ISO group (rats received ISO 150 mg/kg i.p. for two consecutive days at 24 h intervals), and (4) Ali + ISO group (rats received ISO + Ali at 10 mg/kg/day p.o. for 5 days from the 2nd dose of ISO). ISO group showed significant rise in serum cardiac enzymes (CK-MB and LDH), myocardial damage scores, myocardial MDA, HO-1, myocardial Nrf2 expression with significant reduction in myocardial antioxidants (CAT and GSH), and Bcl2 expression compared to the normal group (p < 0.05). ECG showed ST segment elevation, prolonged QT interval and QRS complex, and increased heart rate in ISO group. Co-administration of Ali and ISO caused significant increase in cardiac enzymes and morphology with increase in MDA, serum K, and creatinine with significant decrease in Bcl2, HO-1, and Nrf2 without significant changes in ECG parameters compared to ISO group. We concluded that low dose of Ali seems to exacerbate the myocardial injury in ISO-MI, which might be due to the enhanced oxidative stress and apoptosis.
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Affiliation(s)
- I Bin-Jaliah
- 1 Department of Physiology, College of Medicine, King Khalid University , Abha, Saudi Arabia
| | - A M Hussein
- 2 Medical Physiology Department, Faculty of Medicine, Mansoura University , Mansoura, Egypt
| | - H F Sakr
- 2 Medical Physiology Department, Faculty of Medicine, Mansoura University , Mansoura, Egypt.,3 Department of Physiology, College of Medicine and Health Sciences, Sultan Qaboos University , Muscat, Oman
| | - E A Eid
- 4 Internal Medicine Department, Delta University for Science and Technology , Gamasa, Egypt
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Tanton H, Voronina S, Evans A, Armstrong J, Sutton R, Criddle DN, Haynes L, Schmid MC, Campbell F, Costello E, Tepikin AV. F 1F 0-ATP Synthase Inhibitory Factor 1 in the Normal Pancreas and in Pancreatic Ductal Adenocarcinoma: Effects on Bioenergetics, Invasion and Proliferation. Front Physiol 2018; 9:833. [PMID: 30050450 PMCID: PMC6050379 DOI: 10.3389/fphys.2018.00833] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2018] [Accepted: 06/13/2018] [Indexed: 12/24/2022] Open
Abstract
F1F0-ATP synthase inhibitory factor 1 (IF1) inhibits the reverse mode of F1F0-ATP synthase, and therefore protects cellular ATP content at the expense of accelerated loss of mitochondrial membrane potential (ΔΨm). There is considerable variability in IF1 expression and its influence on bioenergetics between different cell types. High levels of IF1 in a number of cancers have been linked to increased glycolysis, resistance to cell death, increased migration and proliferation. However, neither the expression nor role of IF1 in the normal pancreas or in pancreatic cancer has been characterized. In this study, we found that pancreatic ductal adenocarcinoma (PDAC) patients express higher levels of IF1 in cancerous cells than in pancreatic acinar cells (PACs). PDAC cell lines have a higher IF1 content and IF1/ATP synthase ratio than PACs. The observed differences are consistent with the ability of the respective cell types to maintain ΔΨm and ATP levels in conditions of chemical hypoxia. Acinar cells and PDAC cells preferentially express different IF1 isoforms. Both knockdown and knockout of IF1 in the PANC-1 pancreatic cancer cell line modified cellular bioenergetics and decreased migration, invasion and proliferation suggesting the putative importance of IF1 for PDAC growth and metastasis.
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Affiliation(s)
- Helen Tanton
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, United Kingdom
| | - Svetlana Voronina
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, United Kingdom
| | - Anthony Evans
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Jane Armstrong
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Robert Sutton
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - David N. Criddle
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, United Kingdom
| | - Lee Haynes
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, United Kingdom
| | - Michael C. Schmid
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Fiona Campbell
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Eithne Costello
- Department of Molecular and Clinical Cancer Medicine, University of Liverpool, Liverpool, United Kingdom
| | - Alexei V. Tepikin
- Department of Cellular and Molecular Physiology, University of Liverpool, Liverpool, United Kingdom
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45
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Prompunt E, Nernpermpisooth N, Sanit J, Kumphune S. Overexpression and pre-treatment of recombinant human Secretory Leukocyte Protease Inhibitor (rhSLPI) reduces an in vitro ischemia/reperfusion injury in rat cardiac myoblast (H9c2) cell. Biomol Concepts 2018; 9:17-32. [PMID: 29729136 DOI: 10.1515/bmc-2018-0004] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2018] [Accepted: 04/05/2018] [Indexed: 11/15/2022] Open
Abstract
One of the major causes of cardiac cell death during myocardial ischemia is the oversecretion of protease enzymes surrounding the ischemic tissue. Therefore, inhibition of the protease activity could be an alternative strategy for preventing the expansion of the injured area. In the present study, we investigated the effects of Secretory Leukocyte Protease Inhibitor (SLPI), by means of overexpression and treatment of recombinant human SLPI (rhSLPI) in an in vitro model. Rat cardiac myoblast (H9c2) cells overexpressing rhSLPI were generated by gene delivery using pCMV2-SLPI-HA plasmid. The rhSLPI-H9c2 cells, mock transfected cells, and wild-type (WT) control were subjected to simulated ischemia/reperfusion (sI/R). Moreover, the treatment of rhSLPI in H9c2 cells was also performed under sI/R conditions. The results showed that overexpression of rhSLPI in H9c2 cells significantly reduced sI/R-induced cell death and injury, intracellular ROS level, and increased Akt phosphorylation, when compared to WT and mock transfection (p <0.05). Treatment of rhSLPI prior to sI/R reduced cardiac cell death and injury, and intra-cellular ROS level. In addition, 400 ng/ml rhSLPI treatment, prior to sI, significantly inhibited p38 MAPK phosphorylation and rhSLPI at 400-1000 ng/ml could increase Akt phosphorylation.
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Affiliation(s)
- Eakkapote Prompunt
- Biomedical Research Unit in Cardiovascular Sciences (BRUCS), Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand.,Graduate program in Biomedical Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand
| | - Nitirut Nernpermpisooth
- Biomedical Research Unit in Cardiovascular Sciences (BRUCS), Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand.,Department of Cardio-Thoracic Technology, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand
| | - Jantira Sanit
- Biomedical Research Unit in Cardiovascular Sciences (BRUCS), Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand.,Graduate program in Biomedical Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand
| | - Sarawut Kumphune
- Biomedical Research Unit in Cardiovascular Sciences (BRUCS), Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand.,Department of Medical Technology, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok, 65000, Thailand
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Prompunt E, Sanit J, Barrère-Lemaire S, Nargeot J, Noordali H, Madhani M, Kumphune S. The cardioprotective effects of secretory leukocyte protease inhibitor against myocardial ischemia/reperfusion injury. Exp Ther Med 2018; 15:5231-5242. [PMID: 29904407 PMCID: PMC5996700 DOI: 10.3892/etm.2018.6097] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2017] [Accepted: 03/01/2018] [Indexed: 12/14/2022] Open
Abstract
Protease enzymes generated from injured cells and leukocytes are the primary cause of myocardial cell damage following ischemia/reperfusion (I/R). The inhibition of protease enzyme activity via the administration of particular drugs may reduce injury and potentially save patients' lives. The aim of the current study was to investigate the cardioprotective effects of treatment with recombinant human secretory leukocyte protease inhibitor (rhSLPI) on in vitro and ex vivo models of myocardial I/R injury. rhSLPI was applied to isolated adult rat ventricular myocytes (ARVMs) subjected to simulated I/R and to ex vivo murine hearts prior to I/R injury. Cellular injury, cell viability, reactive oxygen species (ROS) levels, and levels of associated proteins were assessed. The results demonstrated that administration of rhSLPI prior to or during sI/R significantly reduced the death and injury of ARVMs and significantly reduced intracellular ROS levels in ARVMs during H2O2 stimulation. In addition, treatment of ARVMs with rhSLPI significantly attenuated p38 mitogen-activated protein kinase (MAPK) activation and increased the activation of Akt. Furthermore, pretreatment of ex vivo murine hearts with rhSLPI prior to I/R significantly decreased infarct size, attenuated p38 MAPK activation and increased Akt phosphorylation. The results of the current study demonstrated that treatment with rhSLPI induced a cardioprotective effect and reduced ARVM injury and death, intracellular ROS levels and infarct size. rhSLPI also attenuated p38 MAPK phosphorylation and activated Akt phosphorylation. These results suggest that rhSLPI may be developed as a novel therapeutic strategy of treating ischemic heart disease.
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Affiliation(s)
- Eakkapote Prompunt
- Biomedical Research Unit in Cardiovascular Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand.,Graduate program in Biomedical Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand
| | - Jantira Sanit
- Biomedical Research Unit in Cardiovascular Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand.,Graduate program in Biomedical Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand
| | - Stephanie Barrère-Lemaire
- Department of Physiology, Institute of Functional Genomics, National Centre for Scientific Research, French National Institute of Health and Medical Research, University of Montpellier, 34090 Montpellier, France.,Laboratory of Excellence Ion Channel Science and Therapeutics, University of Nice Sophia Antipolis, F-06560 Valbonne, France
| | - Joel Nargeot
- Department of Physiology, Institute of Functional Genomics, National Centre for Scientific Research, French National Institute of Health and Medical Research, University of Montpellier, 34090 Montpellier, France.,Laboratory of Excellence Ion Channel Science and Therapeutics, University of Nice Sophia Antipolis, F-06560 Valbonne, France
| | - Hannah Noordali
- Institute of Cardiovascular Sciences, School of Medical and Dental Sciences, University of Birmingham, B15 2TT Birmingham, UK
| | - Melanie Madhani
- Institute of Cardiovascular Sciences, School of Medical and Dental Sciences, University of Birmingham, B15 2TT Birmingham, UK
| | - Sarawut Kumphune
- Biomedical Research Unit in Cardiovascular Sciences, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand.,Department of Medical Technology, Faculty of Allied Health Sciences, Naresuan University, Phitsanulok 65000, Thailand
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Santacruz L, Arciniegas AJL, Darrabie M, Mantilla JG, Baron RM, Bowles DE, Mishra R, Jacobs DO. Hypoxia decreases creatine uptake in cardiomyocytes, while creatine supplementation enhances HIF activation. Physiol Rep 2018; 5:5/16/e13382. [PMID: 28821596 PMCID: PMC5582266 DOI: 10.14814/phy2.13382] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/15/2017] [Accepted: 07/18/2017] [Indexed: 12/23/2022] Open
Abstract
Creatine (Cr), phosphocreatine (PCr), and creatine kinases (CK) comprise an energy shuttle linking ATP production in mitochondria with cellular consumption sites. Myocytes cannot synthesize Cr: these cells depend on uptake across the cell membrane by a specialized creatine transporter (CrT) to maintain intracellular Cr levels. Hypoxia interferes with energy metabolism, including the activity of the creatine energy shuttle, and therefore affects intracellular ATP and PCr levels. Here, we report that exposing cultured cardiomyocytes to low oxygen levels rapidly diminishes Cr transport by decreasing Vmax and Km. Pharmacological activation of AMP‐activated kinase (AMPK) abrogated the reduction in Cr transport caused by hypoxia. Cr supplementation increases ATP and PCr content in cardiomyocytes subjected to hypoxia, while also significantly augmenting the cellular adaptive response to hypoxia mediated by HIF‐1 activation. Our results indicate that: (1) hypoxia reduces Cr transport in cardiomyocytes in culture, (2) the cytoprotective effects of Cr supplementation are related to enhanced adaptive physiological responses to hypoxia mediated by HIF‐1, and (3) Cr supplementation increases the cellular ATP and PCr content in RNCMs exposed to hypoxia.
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Affiliation(s)
- Lucia Santacruz
- Department of Molecular Biology and Biochemistry, The University of Texas Medical Branch, Galveston, Texas .,Department of Natural Sciences, Bowie State University, Bowie, Maryland
| | - Antonio Jose Luis Arciniegas
- Department of Medicine, Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | | | | | - Rebecca M Baron
- Department of Medicine, Pulmonary and Critical Care Division, Brigham and Women's Hospital, Harvard Medical School, Boston, Massachusetts
| | - Dawn E Bowles
- Duke University Medical Center, Durham, North Carolina
| | | | - Danny O Jacobs
- Department of Surgery, The University of Texas Medical Branch, Galveston, Texas.,Institute for Translational Sciences, University of Texas Medical Branch, Galveston, Texas
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Parry TL, Starnes JW, O'Neal SK, Bain JR, Muehlbauer MJ, Honcoop A, Ilaiwy A, Christopher P, Patterson C, Willis MS. Untargeted metabolomics analysis of ischemia-reperfusion-injured hearts ex vivo from sedentary and exercise-trained rats. Metabolomics 2018; 14:8. [PMID: 30104954 PMCID: PMC6086497 DOI: 10.1007/s11306-017-1303-y] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
Abstract
INTRODUCTION The effects of exercise on the heart and its resistance to disease are well-documented. Recent studies have identified that exercise-induced resistance to arrhythmia is due to the preservation of mitochondrial membrane potential. OBJECTIVES To identify novel metabolic changes that occur parallel to these mitochondrial alterations, we performed non-targeted metabolomics analysis on hearts from sedentary and exercise-trained rats challenged with isolated heart ischemia-reperfusion injury (I/R). METHODS Eight-week old Sprague-Dawley rats were treadmill trained 5 days/week for 6 weeks (exercise duration and intensity progressively increased to 1 h at 30 m/min up a 10.5% incline, 75-80% VO2max). The recovery of pre-ischemic function for sedentary rat hearts was 28.8 ± 5.4% (N = 12) compared to exercise trained hearts, which recovered 51.9% ± 5.7 (N = 14) (p < 0.001). RESULTS Non-targeted GC-MS metabolomics analysis of (1) sedentary rat hearts; (2) exercise-trained rat hearts; (3) sedentary rat hearts challenged with global ischemia-reperfusion (I/R) injury; and (4) exercise-trained rat hearts challenged with global I/R (10/group) revealed 15 statistically significant metabolites between groups by ANOVA using Metaboanalyst (p < 0.001). Enrichment analysis of these metabolites for pathway-associated metabolic sets indicated a > 10-fold enrichment for ammonia recycling and protein biosynthesis. Subsequent comparison of the sedentary hearts post-I/R and exercise-trained hearts post-I/R further identified significant differences in three metabolites (oleic acid, pantothenic acid, and campesterol) related to pantothenate and CoA biosynthesis (p ≤ 1.24E-05, FDR ≤ 5.07E-4). CONCLUSIONS These studies shed light on novel mechanisms in which exercise-induced cardioprotection occurs in I/R that complement both the mitochondrial stabilization and antioxidant mechanisms recently described. These findings also link protein synthesis and protein degradation (protein quality control mechanisms) with exercise-linked cardioprotection and mitochondrial susceptibility for the first time in cardiac I/R.
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Affiliation(s)
- Traci L Parry
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, USA
- Department of Pathology & Laboratory Medicine, University of North Carolina, 111 Mason Farm Road, MBRB 2340B, Chapel Hill, NC, 27599, USA
| | - Joseph W Starnes
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Sara K O'Neal
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC, USA
| | - James R Bain
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC, USA
- Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Michael J Muehlbauer
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC, USA
| | - Aubree Honcoop
- Toxicology Curriculum, University of North Carolina, Chapel Hill, NC, USA
| | - Amro Ilaiwy
- Sarah W. Stedman Nutrition and Metabolism Center, Duke Molecular Physiology Institute, Duke University Medical Center, Durham, NC, USA
- Division of Endocrinology, Metabolism, and Nutrition, Department of Medicine, Duke University Medical Center, Durham, NC, USA
| | - Peter Christopher
- Department of Kinesiology, University of North Carolina at Greensboro, Greensboro, NC, USA
| | - Cam Patterson
- Presbyterian Hospital/Weill-Cornell Medical Center, New York, NY, USA
| | - Monte S Willis
- McAllister Heart Institute, University of North Carolina, Chapel Hill, NC, USA.
- Department of Pathology & Laboratory Medicine, University of North Carolina, 111 Mason Farm Road, MBRB 2340B, Chapel Hill, NC, 27599, USA.
- Department of Pharmacology, University of North Carolina, Chapel Hill, NC, USA.
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Abstract
The opioid receptor family, with associated endogenous ligands, has numerous roles throughout the body. Moreover, the delta opioid receptor (DORs) has various integrated roles within the physiological systems, including the cardiovascular system. While DORs are important modulators of cardiovascular autonomic balance, they are well-established contributors to cardioprotective mechanisms. Both endogenous and exogenous opioids acting upon DORs have roles in myocardial hibernation and protection against ischaemia-reperfusion (I-R) injury. Downstream signalling mechanisms governing protective responses alternate, depending on the timing and duration of DOR activation. The following review describes models and mechanisms of DOR-mediated cardioprotection, the impact of co-morbidities and challenges for clinical translation.
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Affiliation(s)
- Louise See Hoe
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, 4222, Australia
- Critical Care Research Group, The Prince Charles Hospital and The University of Queensland, Chermside, QLD, Australia
| | - Hemal H Patel
- VA San Diego Healthcare System, San Diego, CA, USA
- Department of Anesthesiology, University of California San Diego, La Jolla, CA, USA
| | - Jason N Peart
- Menzies Health Institute Queensland, Griffith University, Southport, QLD, 4222, Australia.
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50
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Simonovic N, Jeremic J. Role of Calcium Channel Blockers in Myocardial Preconditioning. SERBIAN JOURNAL OF EXPERIMENTAL AND CLINICAL RESEARCH 2017. [DOI: 10.1515/sjecr-2016-0073] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022] Open
Abstract
Abstract
Coronary heart disease is the leading cause of mortality and morbidity worldwide. The effects of coronary heart disease are usually attributable to the detrimental effects of acute myocardial ischaemia-reperfusion injury. Newer strategies such as ischaemic or pharmacological preconditioning have been shown to condition the myocardium to ischaemia-reperfusion injury and thus reduce the final infarct size. This review investigates the role of calcium channel blockers in myocardial preconditioning. Additionally, special attention is given to nicorandil whose mechanism of action may be associated with the cardioprotective effects of preconditioning. There are still many uncertainties in understanding the role of these agents in preconditioning, but future research in this direction will certainly help reduce coronary heart disease.
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Affiliation(s)
| | - Jovana Jeremic
- Department of Pharmacy, Faculty of Medical Sciences , University of Kragujevac , Kragujevac , Serbia
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