过度训练对大鼠血清心肌酶活性的影响   总被引：6，自引：0，他引：6  

王沛 《西安体育学院学报》2001,18(2):35-37

为了探讨过度训练对机体心脏功能的影响及其机制 ,通过对大鼠进行力竭性运动训练建立大鼠的过度训练模型 ,测定血清中CK、CK -MB、HBDH的活性以及心肌组织中SOD活性和MDA含量。研究结果 :经过 8周的运动训练后 ,1h训练组中血清CK、CK -MB和HBDH活性与对照组相比有上升趋势 ,但无显著性差异 ;而过度训练组血清CK、CK -MB和HBDH活性均显著高于对照组和 1h训练组。与此同时 ,1h训练组心肌组织中SOD活性、MDA含量和SOD/MDA与对照组相比均无显著性差异 ;而过度训练组心肌组织中 ,MDA含量显著高于对照组 ,SOD活性和SOD/MDA均显著低于对照组和 1h训练组。结果表明过度训练对心肌细胞具有一定的损伤作用 ,过度训练使心肌组织中氧自由基的生成显著增加 ,这可能也是血清心肌酶活性升高的机制。训练过程中定期检测血清心肌酶的活性 ,对于了解运动员的机能状态 ,预防过度训练的发生具有非常重要的意义。  相似文献   

Allograftic bone marrow-derived mesenchymal stem cells transplanted into heart infarcted model of rabbit to renovate infarcted heart     

王建安  李长岭  樊友启  何红  孙勇 《浙江大学学报(A卷英文版)》2004,5(10):1279-1285

Objective: To investigate the directed transplantation of allograftic bone marrow-derived mesenchymal stem cells (MSCs) in myocardial infarcted (MI) model rabbits. Materials and Methods: Rabbits were divided into 3 groups, heart infarcted model with MSCs transplanted treatment (MSCs group, n=12), heart infarcted model with PBS injection (control group, n=20), sham operation with PBS injection (sham group, n=l 7). MSCs labelled by BrdUrd were injected into the MI area of the MSCs group. The same volume of PBS was injected into the MI area of the control group and sham group. The mortality, LVIDd, LVIDs and LVEF Of the two groups were compared 4 weeks later. Tropomyosin inhibitory component (Tn I) and BrdUrd immunohistochemistry identified the engrafted cells 4 weeks after transplantation. Result: The mortality of the MSCs group was 16.7% (2/12), and remarkably lower than the control group's mortality [35% (7/20) (P＜0.05)].Among the animals that survived for 4 weeks, the LVIDd and LVIDs of the MSCs group after operation were 1.17±0.21 cm and 0.74±0.13 cm, and remarkably lower than those of the model group, which were 1.64±0.14 cm and 1.19±0.12 cm (P＜0.05); the LVEF of the MSCs group after operation was 63±6%, and remarkably higher than that of the model group,which was 53±6% (P＜0.05). Among the 10 cases of animals that survived for 4 weeks in the MSCs group, in 8 cases (80%),the transplanted cells survived in the non MI, MI region and its periphery, and even farther away; part of them differentiated into cardiomyocytes; in 7 cases (70%), the transplanted cells participated in the formation of blood vessel tissue in the MI region. Conclusion: Transplanted allograftic MSCs can survive and differentiate into cardiomyocytes, form the blood vessels in the MI region. MSCs transplantation could improve the heart function after MI.  相似文献   

动脉粥样硬化性脑梗塞和脑出血患者血浆可溶性血栓调节蛋白水平的研究   总被引：1，自引：0，他引：1  

刘建仁  章昀  张敏  张佩利  黄鉴政  魏尔清 《科技通报》2003,19(2):158-161

目的 探讨血浆可溶性血栓调节蛋白（Soluble thrombmodulin,sTM）与脑梗塞和脑出血患者小血管损伤、动脉粥样硬化的关系。方法 应用酶联免疫吸附方法（Enzyme-Linked Immunosorbent Assays,ELISA），检测60例脑梗塞患者、56例脑出血患者和64例健康对照的sTM水平，并分析sTM与血脂、血压的关系。结果 脑梗塞和脑出血的甘油三脂、舒张期血压明显高于对照组；脑梗塞和脑出血的高密度脂蛋白显著低于对照组；脑出血组的收缩期血压明显高于其他两组；脑梗塞的 胆固醇水平显著高于其他两组；脑出血的sTM显著高于脑梗塞和对照组，而脑梗塞的sTM显著高于对照组。sTM与总胆固醇、甘油三脂、收缩和舒张期血压水平显著正相关；sTM与高密度脂蛋白水平成显著负相关。结论 脑梗塞和脑出血存在由高血压和动脉粥样硬化导致的小血管损伤。sTM是脑卒中的独立危险因子。  相似文献   

Cell therapy in congestive heart failure   总被引：5，自引：0，他引：5  

Tao ZW  Li LG 《Journal of Zhejiang University. Science. B》2007,8(9):647-660

Congestive heart failure （CHF） has emerged as a major worldwide epidemic and its main causes seem to be the aging of the population and the survival of patients with post-myocardial infarction. Cardiomyocyte dropout （necrosis and apoptosis） plays a critical role in the progress of CHF; thus treatment of CHF by exogenous cell implantation will be a promising medical approach. In the acute phase of cardiac damage cardiac stem cells （CSCs） within the heart divide symmetrically and/or asymmetrically in response to the change of heart homeostasis, and at the same time homing of bone marrow stem cells （BMCs） to injured area is thought to occur, which not only reconstitutes CSC population to normal levels but also repairs the heart by differentiation into cardiac tissue. So far, basic studies by using potential sources such as BMCs and CSCs to treat animat CHF have shown improved ventricular remodelling and heart function. Recently, however, a few of randomized, double-blind, placebo-controlled clinical trials demonstrated mixed results in heart failure with BMC therapy during acute myocardial infarction.  相似文献   

Effect of a distal protection device on epicardial blood flow and myocardial perfusion in primary percutaneous coronary intervention   总被引：2，自引：0，他引：2  

Zhou BQ  Tahk SJ 《Journal of Zhejiang University. Science. B》2007,8(8):575-579

Objective: The beneficial effect of percutaneous coronary intervention (PCI) in patients with acute myocardial infarction (AMI) has been well established, but there is the problem of no-reflow phenomenon which is an adverse prognostic factor in primary PCI. In the present study the effect of a distal protection device (PercuSurge GuardWire; GW) on epicardial blood flow and myocardial perfusion was evaluated. Methods and Results: Patients with AMI were randomly divided into 2 groups, the GW and the control groups. The GW group included 52 patients with AMI who underwent primary PCI with GW protection and the control group included 60 patients who underwent primary PCI without GW protection. Epicardial blood flow in the infarct-related artery (IRA) and myocardial perfusion were evaluated according to the thrombolysis in myocardial infarction (TIMI) flow grade and the myocardial blush grade (MBG). We found TIMI score of 3 was obtained significantly more frequently in the GW group (96%) than in the control group (80%). The MBG score of 3 was obtained also significantly greater in the GW group (65%) than in the control group (33%). Conclusion: Primary PCI with GW protection can significantly improve epicardial blood flow and myocardial perfusion.  相似文献   

甲烷水对一次性力竭运动所致大鼠心肌损伤的保护作用     

王茜  辛磊  陈笑欢  胡静芸  娄淑杰 《北京体育大学学报》2017,40(7):43-48

摘要：目的：观察灌服甲烷水对一次性力竭运动所致大鼠心肌缺血性损伤、心脏组织内氧化应激和炎症因子的影响，探讨其对运动性心肌损伤产生保护作用的可能机制。方法：24只雄性SD大鼠随机分为安静对照组（C组）、运动对照组（EP组）、运动甲烷水组（EM组）。EP组和EM组分别于运动前30 min灌服蒸馏水和甲烷水，之后进行一次性力竭跑台运动。采用化学比色法、ELISA和Luminex xMAP?技术（液态悬浮芯片技术）检测大鼠血清和心肌中生化指标。结果：1）EM组较EP组运动时间显著延长（P<0.01）。2）与C组比较，EP组大鼠血清中IL-1β、IL-6含量极显著升高（P<0.01），心肌eNOS水平显著降低，MDA含量显著升高（P<0.05），3-NT含量极显著性升高（P<0.01）；与EP组比较，EM组血清中cTnI水平显著上升，IL-1β、IL-6含量显著下降（P<0.05），大鼠心肌eNOS水平显著升高（P<0.05），SOD活性、T-AOC含量极显著上升（P<0.01），MDA含量、3-NT含量显著降低（P<0.05）。结论：灌服甲烷水提高大鼠运动能力，可能是通过增加心肌eNOS水平，催化NO生成，舒张血管；提高心肌抗氧化能力，改善大鼠心肌氧化应激损伤，从而对运动性心肌损伤具有一定的保护作用。  相似文献   

抗阻训练对心梗大鼠心脏和骨骼肌NRG1表征的影响及其性别差异     

王庆安  蔡梦昕  田振军 《北京体育大学学报》2014,37(11):68-72+85

摘要：目的：探讨抗阻训练对心肌梗死(myocardial infarction, MI)大鼠心脏和骨骼肌形态结构及神经调节蛋白1（Neuregulin1, NRG1）表征的影响及其性别差异。方法：3月龄Sprague Dawley大鼠,随机分为雄性假心梗组(MS)、雄性心梗安静组(MMI)、雄性心梗运动组(MMR)、雌性假心梗组(FS),雌性心梗安静组(FMI)和雌性心梗运动组(FMR),每组8只。MMR和FMR组进行为期4wk负荷渐进性递增抗阻训练。血流动力学测定心功能;组织学染色观察并计算形态学变化;检测心脏和骨骼肌中NRG1和ErbB2/4受体的表达变化。结果：MI后大鼠心功能显著降低,心肌组织出现替代性纤维化,腓肠肌质量和细胞横截面积不同程度减小。抗阻训练显著提高了MI大鼠心功能,增加了腓肠肌相对质量和细胞横截面积,同时显著上调雄性MI大鼠心肌和骨骼肌中NRG1蛋白水平及雄性和雌性MI大鼠ErbB2和ErbB4的表达(p<0.05, p<0.01)。结论：抗阻训练促进MI大鼠心功能改善和骨骼肌生长,上调心肌和骨骼肌中NRG1及其受体表达,且不同性别之间存在程度差异性。  相似文献   

运动心脏心肌收缩成分缩短加速度的生理意义     

李昭波 《西安体育学院学报》1994,(3)

本文首次较全面论述了心肌收缩成分缩短加速度这一类精确地、敏感地，在更深层次上反映心肌收缩性能的指标在运动心脏功能研究中的生理意义，详细探讨了心肌收缩成分缩短加速度类指标提出的背景、测量原理，曲线波型特点及参数值．为这类指标在运动性心脏心肌收缩性能的研究中的应用，提供了基础参考资料。  相似文献   

运动性心脏心肌收缩性现代研究     

李昭波 《西安体育学院学报》1994,(1)

运动性心脏心肌收缩性的研究是运动员心脏功能研究的热点之一．本文较祥细论述了经过系统训练的人和动物，在运动负荷状态下、过度运动负荷状态和安静状态下心肌收缩性能的变化特征，生理意义和预后发展．并对其产生的生理机制进行了探讨．为更深入了解运动性心脑心肌收缩性能的变化特征提供了参考资料．  相似文献   

快速驱动致心脏疲劳室内压变化的实验研究     

刘紫荆  熊静宇 《辽宁体育科技》2009,31(3):32-33

通过快速驱动方法模拟激烈运动，测定心室内压、室内压最大上升速率（＋dp，dtmax）和最大下降速率（-dp／dtmax），探讨疲劳时心脏活动变化。方法：以虎纹蛙心脏为实验材料，采用BL-410生物机能实验系统。通过心室插管，分别记录驱动前和驱动后心功能的四项指标，即最高室内压、最低室内压、＋dp/dtmax、-dp/dtmax的曲线变化。结果：快速驱动2min后。心脏收缩期室内压最高压力显著下降（P〈0．05），舒张期室内压最低压力无显著变化（P〉0．05）；收缩期室内压＋dp/dtmax和舒张期室内压-dp/dkmax显著降低，与驱动前比较差异显著（P〈0．05）。结论：快速驱动后心肌收缩能力显著减弱。  相似文献