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Lian H, Qin Z, Wu M, Zuo P, Bai L, Lu M, Li L, Zhang H. Contractility detection of isolated mouse papillary muscle using myotronic Myostation-Intact device. Animal Model Exp Med 2022; 5:445-452. [PMID: 36168142 PMCID: PMC9610137 DOI: 10.1002/ame2.12272] [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: 04/13/2022] [Accepted: 08/29/2022] [Indexed: 11/06/2022] Open
Abstract
Background To understand the relationship between myocardial contractility and external stimuli, detecting ex vivo myocardial contractility is necessary. Methods We elaborated a method for contractility detection of isolated C57 mouse papillary muscle using Myostation‐Intact system under different frequencies, voltages, and calcium concentrations. Results The results indicated that the basal contractility of the papillary muscle was 0.27 ± 0.03 mN at 10 V, 500‐ms pulse duration, and 1 Hz. From 0.1 to 1.0 Hz, contractility decreased with an increase in frequency (0.45 ± 0.11–0.10 ± 0.02 mN). The voltage‐initiated muscle contractility varied from 3 to 6 V, and the contractility gradually increased as the voltage increased from 6 to 10 V (0.14 ± 0.02–0.28 ± 0.03 mN). Moreover, the muscle contractility increased when the calcium concentration was increased from 1.5 to 3 mM (0.45 ± 0.17–1.11 ± 0.05 mN); however, the contractility stopped increasing even when the concentration was increased to 7.5 mM (1.02 ± 0.23 mN). Conclusions Our method guaranteed the survivability of papillary muscle ex vivo and provided instructions for Myostation‐Intact users for isolated muscle contractility investigations.
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Affiliation(s)
- Hong Lian
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Beijing Key Laboratory of Preclinical Research and Evaluation for Cardiovascular Implant Materials, Animal Experimental Center, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Zhuyun Qin
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Adult Surgical Intensive Care Unit, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Mengge Wu
- National Health Commission Key Laboratory of Cardiovascular Regenerative Medicine, Fuwai Central-China Hospital, Central-China Subcenter of National Center for Cardiovascular Diseases, Zhengzhou, China
| | - Peipei Zuo
- National Health Commission Key Laboratory of Cardiovascular Regenerative Medicine, Fuwai Central-China Hospital, Central-China Subcenter of National Center for Cardiovascular Diseases, Zhengzhou, China
| | - Lina Bai
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Minjie Lu
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Lulu Li
- State Key Laboratory of Cardiovascular Disease, Fuwai Hospital, National Center for Cardiovascular Disease, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China.,Adult Surgical Intensive Care Unit, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
| | - Haitao Zhang
- Adult Surgical Intensive Care Unit, Fuwai Hospital, Chinese Academy of Medical Sciences and Peking Union Medical College, Beijing, China
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Li Y, Wang Z. Interleukin 32 participates in cardiomyocyte‑induced oxidative stress, inflammation and apoptosis during hypoxia/reoxygenation via the NOD2/NOX2/MAPK signaling pathway. Exp Ther Med 2022; 24:567. [PMID: 35978933 PMCID: PMC9366315 DOI: 10.3892/etm.2022.11504] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2022] [Accepted: 06/24/2022] [Indexed: 11/05/2022] Open
Affiliation(s)
- Yuanyuan Li
- Department of Cardiovascular Surgery, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
| | - Zhongyan Wang
- Department of Geriatrics, The Second Hospital of Tianjin Medical University, Tianjin 300211, P.R. China
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Qin Z, Shen S, Qu K, Nie Y, Zhang H. Mild hypothermia in rat with acute myocardial ischaemia-reperfusion injury complicating severe sepsis. J Cell Mol Med 2021; 25:6448-6454. [PMID: 34057282 PMCID: PMC8406477 DOI: 10.1111/jcmm.16649] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2021] [Revised: 04/28/2021] [Accepted: 05/03/2021] [Indexed: 02/06/2023] Open
Abstract
Myocardial ischemia-reperfusion injury (MIRI) with concurrent severe sepsis has led to substantial mortality. Mild hypothermia (MHT) has been proved to have a therapeutic effect in either MIRI or severe sepsis, which suggests it might be beneficial for MIRI complicating severe sepsis. In this study, Sprague-Dawley rats with MIRI complicating severe sepsis were allotted in either MHT (33 ± 0.5°C) group or normothermia (NT, 37 ± 0.5°C) group; as control, rats receiving sham surgery and normal saline were kept at NT. After 2h of temperature maintenance, blood and heart tissue were acquired for detections. Lactate dehydrogenase (LDH) and MB isoenzyme of creatine kinase (CK-MB) in blood, triphenyl tetrazolium chloride and Evans blue staining, hematoxylin and eosin staining for myocardium were employed to detect myocardial damage. Tumor necrosis factor (TNF)-α and caspase-3 was performed by immunohistochemistry to exam myocardial inflammation and apoptosis. Detection of NADPH oxidase (NOX) 2 was for myocardial oxidative stress. In MHT group, systolic blood pressure was improved significantly compared with NT group. Myocardial infarct size, morphological change, LDH and CK-MB levels were attenuated compared to NT group. Moreover, less expressions of TNF-α, caspase-3 and NOX2 in MHT group were presented compared with NT group. MHT showed cardioprotection by improving cardiac dysfunction, reducing myocardial infarct size and attenuating myocardial injury, inflammation, apoptosis and oxidative stress.
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Affiliation(s)
- Zhuyun Qin
- State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijingChina
| | - Shixuan Shen
- Zhengzhou University People's HospitalHenan Provincial People's HospitalZhengzhouChina
| | - Kaiyong Qu
- State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijingChina
| | - Yu Nie
- State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijingChina
| | - Haitao Zhang
- State Key Laboratory of Cardiovascular DiseaseNational Center for Cardiovascular DiseaseChinese Academy of Medical Sciences and Peking Union Medical CollegeFuwai HospitalBeijingChina
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