心梗后进行有氧运动干预对大鼠心脏TH、TNF-α和ROS水平的关系探讨     

陈婷  田振军 《北京体育大学学报》2015,38(7):79-84

摘要: 目的:探讨心梗后进行4周有氧运动干预对大鼠心脏交感神经标记物TH,促炎因子TNF-α与氧化应激水平的关系。方法: 选取雄性SD大鼠36只,随机分为假手术对照组(SC),心肌梗死组(MI),心梗+持续有氧运动组(ME),每组12只。MI组采用心脏左冠状动脉前降支(LAD)结扎法,建立MI模型。SC组大鼠实施假手术,ME组大鼠在MI手术后一周进行4跑台运动。运动以10 m/min速度开始,运动5 min后,以3 m/min的速度递增至16 m/min。运动总时间均为60 min,5 d/周×4周。训练结束后测定各组大鼠心电图变化。之后开胸摘取心脏,进行组织学制片。免疫组化法观察分析左心室交感神经标记物TH及促炎因子TNF-α表达。Western Blot法检测TH及TNF-α蛋白含量。DHE法检测心肌超氧阴离子水平。结果: 与SC组相比,MI组大鼠左心室中可见大量TH阳性神经纤维(P<0.01),其蛋白表达显著增加(P<0.01)。同时TNF-α蛋白表达及超氧阴离子水平显著升高(均P<0.01)。与MI组比较,ME组左心室TH,TNF-α蛋白表达及超氧阴离子水平均显著下降(P<0.05, P<0.01, P<0.01)。且发现左心室TH表达与ROS水平呈显著正相关(R=0.53, P<0.05),而TH与TNF-α相关性不显著 (R=0.41, P=0.11)。结论: 心梗后早期进行四周持续有氧运动干预可抑制心梗大鼠心脏交感神经标志物TH,其可能与抑制心肌氧化应激水平关系密切,与炎性细胞因子TNF-α水平关系不显著。  相似文献   

Concurrent pulmonary thrombosis with systemic embolism: a case report     

Xiao-jie Xie  Ju-bo Jiang  Jun Jiang  Jian-an Wang 《Journal of Zhejiang University. Science. B》2014,15(9):838-844

Based on different mechanisms of blood coagulation, coexistence of venous thromboembolism and arterial thrombosis in a single individual is extremely rare in clinical practice. Both antiplatelet and anticoagulation therapy should be adopted for patients with arteriovenous embolism. Balancing the risk of ischemia and hemorrhage is especially challenging in these patients in order to achieve an optimal clinical benefit. We report on a 55-year-old female with acute pulmonary embolism (PE), subsequently diagnosed as having acute myocardial infarction (AMI) and a cerebral infarction. Examinations had been carried out, excluding potential arteriovenous shunts, cancer, antiphospholipid syndrome and other common hypercoagulable states. A combination of an anticoagulant drug (rivaroxaban, an Xa inhibitor) and an antiplatelet agent (clopidogrel, an ADP receptor inhibitor) was prescribed with a β-blocker and atorvastatin. The embolus was gradually shrunk during the next 10 months, and then it turned back into expanding. During the 16 months’ follow-up, an aneurysm of left ventricular apex was found through an echocardiogram and an angiotensin-converting enzyme inhibitor was administered. We conclude that combined anticoagulation and antiplatelet therapy significantly relieved the symptoms and improved the prognosis in patients suffering from arteriovenous embolism without any major clinical bleeding events.  相似文献   

抗阻训练对老龄大鼠腓肠肌Ca2+及线粒体膜电位的影响     

王震  林文弢  翁锡全  孟艳  蔺海旗 《广州体育学院学报》2014,(2):85-88

目的:通过实验研究探讨抗阻训练对老龄大鼠腓肠肌Ca2+及线粒体膜电位的影响。方法:研究对象为雄性SD大鼠,人工喂养18月龄进行8周抗阻训练干预,分别以无负重、30%、50%、70%最大负重进行训练,跑台放置坡度为35°,跑速15m/min,隔天抗阻训练。8周末检测腓肠肌胞浆Ca2+及线粒体膜电位,并与安静组比较。结果:30%、50%最大负重抗阻训练两组老龄大鼠腓肠肌Ca2+下降具有显著性意义(P0.05);无负重、30%、50%最大负重抗阻训练三组老龄大鼠线粒体膜电位下降有极显著性差异(P0.01)。结论:低、中等负重抗阻训练能降低衰老过程中腓肠肌胞浆Ca2+、提高线粒体膜电位,改善线粒体功能,从而预防、延迟衰老过程中线粒体功能障碍的发生。  相似文献   

不同体力活动水平高校女性教师递增负荷运动前后血清心肌酶的比较研究     

赖晓红  曹建民  黄剑雅 《广州体育学院学报》2014,(5):94-98

目的:研究不同体力活动水平女性教师递增负荷前后血清心肌酶的差异,进而评估不同体力活动水平女性教师运动中可能出现的心脏风险。方法:对受试者进行体力活动问卷调查,从中筛选87名健康女性教师进行递增负荷试验,测试运动测试前后的心肌酶指标进行比较分析。结果:1)运动前安静状态下,体力活动不足组心肌酶各指标值均低于中、高水平体力活动组,其中体力活动不足组CK-MB显著的低于中等组(P0.05)并且非常显著的低于高等组(P0.01)。2)运动测试后,体力活动高水平组CK值显著的高于体力活动不足组(P0.05),除AST以外,其余心肌酶水平随着体力活动水平的升高而升高。其中体力活动不足组AST值超过正常值范围,提示心肌组织出现了一定的损伤。3)除中等和高水平体力活动组的CK-MB运动后比运动前有所下降外,其余各组指标运动后都有所升高,特别是三组的CK、AST都非常显著的升高(P0.01),从运动前后差值比较分析来看,不足组的CK、AST增加值显著的高于中等组和高等组(P0.05)。结论:1.体力活动不足的高校女性教师安静状态下的心肌酶水平较低。2.递增负荷运动会引起高校女性教师心肌细胞出现一定程度的损伤,运动后血清心肌酶水平有所升高,而且体力活动不足女性的损伤更为严重,主要表现在心肌酶指标中的CK和AST。  相似文献   

心肌桥与运动员选材     

胡柏平  刘旭娇 《山西师大体育学院学报》2014,(4):110-113

通过阐释心肌桥的形态结构和运动员心脏的特点,分析了心肌桥可能引起急性冠脉综合症、严重的心律失常甚至猝死。尤其是在运动情况下,心肌缺氧缺血等情况会较为明显。而心律失常在长期从事严格运动训练的运动员中时有发生。研究认为,在运动员选材中应将心肌桥的检查作为一项重要指标,对运动员选材的成功率有一定的帮助。  相似文献   

Glycogen phosphorylase isoenzyme BB in the diagnosis of acute myocardial infarction: a meta-analysis     

Giuseppe Lippi  Camilla Mattiuzzi  Ivan Comelli  Gianfranco Cervellin 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2013,23(1):78-82

Background

Early diagnosis is crucial for management of patients with suspected acute myocardial infarction (AMI). Among innovative and promising biomarkers, the recent interest raised on glycogen phosphorylase isoenzyme BB (GPBB) has prompted us to perform a meta-analysis of published studies.

Materials and methods:

A systematic electronic search was carried out on PubMed, Web of Science and Google Scholar, with no date restriction, to retrieve all articles that have investigated the early diagnostic performance of GPBB in patients with suspected AMI, and directly reported or allowed calculation of sensitivity and specificity. A meta-analysis of the reported sensitivity and specificity of each study and pooled area under the curve (AUC) was then performed by random effect approach. Heterogeneity was assessed by I-square statistics.

Results:

Eight studies were finally selected for analysis (941 subjects; 506 cases and 435 controls), with a high heterogeneity (I-squared, 86.3%). The resulting pooled estimates and 95% confidence interval were 0.854 (0.801–0.891) for sensitivity, 0.767 (0.713–0.815) for specificity, 0.826 (0.774–0.870) for negative predictive value, 0.802 (0.754–0.844) for positive predictive value, and 0.754 (0.602–0.907) for AUC. In those studies that have simultaneously assessed GPBB and a troponin immunoassay, the combination of these biomarkers did not significantly improve the performance of troponin alone.

Conclusion:

GPBB does not meet the current requirements for an efficient diagnosis of AMI when used as a stand-alone test, whereas its combination with troponin merits further investigation in larger trials.  相似文献   

β-受体阻断剂对心脏康复跑台运动时机能、生理、临床和感觉反应的影响     

刘洵  Brodie D A  任丽伟  Bundred P E 《体育科学》2006,26(9):28-30,33

目的：测试服用和未服用β-受体阻断剂的心梗后患者（PMIP）在跑台运动中其功能、生理、临床及自我感觉方面的反应。方法：46名服用β-受体阻断剂的男性PMIP和55名未服用β-受体阻断剂的男性PMIP进行递增负荷运动实验，其间记录每级负荷时的摄氧量（VO2）、心率（HR）、血压和自我用力感觉（RPE），并持续监测12导联心电图（ECG）。结果：服用β-受体阻断荆的患者其安静时和运动中的HR、最大心率百分比（％HRmax）及心率血压乘积（RPP）显著低于未服用β-受体阻断剂的患者（P〈0．01）。运动中，服用β-受体阻断剂的患者有59％能够完成改良布鲁斯跑台方案的第Ⅳ级运动，而在未服用β-受体阻断剂的患者中仅有49％能完成这一负荷。两组在运动中各级别VO2、RPE及ST段下移无显著性差异。结论：由β受体阻断剂所致的HR降低并没有直接地影响到氧利用和代谢机能。  相似文献   

急性运动心肌缺氧对大鼠心肌纤维和线粒体膜结构及功能的影响??   总被引：11，自引：0，他引：11  

张勇??  张薇  时庆德  李静先  陈家琦 《天津体育学院学报》1997,12(1):18-22

采用递增负荷耗竭运动模型为急性缺氧应激源，观察了ＳＤ大鼠急性运动至力竭后心肌组织和线粒体膜过氧化脂质含量，线粒体内膜ＮＡＤＨ－ＣｏＱ还原酶活性变化和心肌纤维和线粒体超微结构。结果表明，心肌能量需求过高性缺氧应激后大鼠心肌组织匀浆和线粒体膜过氧化脂含量分别增高１４０．９％和３９．４％（Ｐ＜０．０１和Ｐ＜０．０５），线粒体内膜ＮＡＤＨ－ＣｏＱ还原酶活性降低６１．６％（Ｐ＜０．０５），心肌纤维和线粒体超微结构呈缺氧损伤性改变。研究提示，急性运动缺氧应激后心肌组织和心肌线粒体膜结构变化与脂质过氧化作用增强有关  相似文献   

间歇低氧训练对大鼠心肌毛细血管的影响     

陈福刁 《广州体育学院学报》2005,25(6):47-48,51

目的：探讨间歇低氧训练对大鼠心肌毛细血管的影响，为高原训练方案的制定提供理论依据。方法：采用透射电镜技术观察大鼠心肌细胞毛细血管超微结构在低氧适应过程中的变化。结果：运动训练可以改善大鼠心肌细胞毛细血管超微结构；急性低氧可造成心肌超微结构的损伤；经过4wk的慢性间歇低氧运动训练后再进行急性低氧应激，心肌的损伤减轻。结论：急性运动后进入急性低氧应激，导致心肌损伤加重，是由于运动缺氧损伤和低氧损伤双重作用的结果，而4wk的慢性间歇低氧训练可减轻低氧环境对心肌的损伤。  相似文献   

Long-term inhibition of Na+/H+ exchange attenuates cardiac remodeling after myocardial infarction in rats     

Xia Qin-gui  Oliver Chung  Heidi Spitznagel  Thomas Unger 《浙江大学学报(A卷英文版)》2001,2(4):439-444

Objective: In addition to pH regulation, Na⁺/H⁺ exchange (NHE) has been shown to facilitate cell growth and proliferation. However, the effects of long-term inhibition of Na⁺/H⁺ exchange on cardiac structural and functional remodeling post myocardial infarction (MI) are still controversial. The present study was therefore carried out to further investigate the effects of long-term treatment with cariporide, a specific inhibitor of NHE-1, on cardiac remodeling after MI in rats; Methods: Male Wistar rats that underwent coronary ligation were randomly selected for cariporide treatment starting 6 h after induction of MI or no treatment. Treatment was continued up to 6 weeks post MI, after which, the arterial, venous and left ventricular catheters were chronically implanted. Twenty-four h later, after hemodynamic signals were recorded in conscious rats, they were sacrificed and hearts were taken out for morphological examinations; Results: Cariporide treatment decreased the heart weight and heart weight to body weight ratio (bothP<0.05), decreased left ventricular end-diastolic pressure (P<0.001), improved myocardial contractility (dP/dt _max) (P<0.05) and tended to increase the survival of treated rats compared to that of untreated infarct rats; Conclusion: The results of the present study indicate that the long-term inhibition of NHE with cariporide can attenuate cardiac structural remodeling and improve left ventricular dysfunction in infarcted rats, and suggest that Na⁺/H⁺ exchange inhibition could be an effective therapeutic strategy for myocardial infarction-induced heart failure.  相似文献