女贞子提取物对大鼠心肌的保护作用及对运动能力的影响     

戚世媛  熊正英 《山东体育学院学报》2011,27(1):53-57

目的:通过女贞子提取物对大强度耐力训练大鼠心肌的保护作用,探讨女贞子提取物对大鼠运动能力影响的机制。方法:24只SD大鼠随机分安静组、运动组和运动+女贞子组,每组8只。运动组进行6周大强度跑台训练,运动+女贞子组除大强度跑台训练外,每天灌服400 mg/kg女贞子提取物,体积为2 ml。安静组和训练对照组灌胃同体积0.5%Tween-80溶液。6周后安静组在安静时、运动组和运动+女贞子组进行一次力竭性运动后取材,测定心肌抗氧化酶SOD、GSH-Px、CAT活性和GSH、MDA含量。结果:运动+女贞子组大鼠心肌抗氧化酶活性与运动组比较均有显著升高(P<0.05),GSH含量显著高于运动组(P<0.05),MDA含量显著低于运动组(P<0.05),血清AST/GOT活性低于运动组(P<0.05),运动至力竭的时间明显延长。结论:补充女贞子提取物可以调节大鼠心肌中抗氧化酶活性,对心肌有很好的保护作用,防止氧损伤,维护心脏的正常结构和功能,提高运动能力。  相似文献   

少年男子中长跑运动员10km训练跑对血清心肌损伤标志物水平的影响     

时庆德  聂金雷  刘蔚 《北京体育大学学报》2011,34(3):52-55

目的:观察常规训练中非力竭耐力运动前后少年运动员血清心肌损伤标志物水平的变化。方法:测定19名少年男子中长跑运动员在常规训练中一次非全力10 km跑前、运动后2 h、运动后4 h以及运动后24 h血清心肌肌钙蛋白T亚基(cTnT)、I亚基(cTnI)、CK-MB活性及CK-MB质量水平。结果:10 km跑可显著提高被试者血清cTnT、cTnI及CK-MB质量水平。运动后4 h内血清cTnT和cTnI可超过临床心肌损伤(60%以上被试者)甚至心肌梗死(10.5%~42.1%被试者)界值,而运动后24 h,血清cTnT及cTnI恢复至正常水平。另外,运动前后各观察点都有相当比例的被试者(15.8%~84.2%)CK-MB活性及质量超过心肌损伤界值。结论:非力竭性耐力运动可能引起少年运动员可逆性心肌微损伤,但其确切机制、临床意义及远期后果有待进一步研究。  相似文献   

不同运动负荷大鼠心肌胶原纤维的组织学变化     

马宇峰 《山东体育学院学报》2005,21(5):58-61

为探讨心室肌胶原纤维的组成、分布以及对心功能的影响，观察不同运动负荷下心肌间质胶原纤维的变化，选用雄性大鼠36只，随机分为对照组、一般运动负荷组和超负荷组，每组12只.各运动组训练满8周后，分别取左心室前壁、左心室乳头肌，常规固定，石蜡包埋、制片，用Masson染色光镜观察并进行图像分析.发现对照组胶原纤维走行及分布均匀;一般负荷组胶原纤维增多，在细胞周围呈环状分布，胶原纤维鞘上纤维母细胞增多;超负荷组胶原纤维明显增多，在心肌细胞周围呈条索状广泛分布（P＜0.01）.得出结论：胶原纤维结构改变是很多心脏病理状态的重要特征，随运动负荷的增加，心肌间质胶原纤维显著增加，心肌结构发生明显改建。  相似文献   

不同运动负荷对心脏超微结构与NO、NOS的影响   总被引：7，自引：3，他引：4  

田石榴  舒彬  陈文鹤 《沈阳体育学院学报》2003,(3):38-40,49

采用大鼠 8周递增负荷游泳训练模型 ,观察不同运动负荷方式对大鼠心脏超微结构的影响 ,以及血浆和心肌中舒血管因子一氧化氮NO、一氧化氮合酶NOS的变化 ,探讨不同运动负荷对大鼠的影响 ,并对其产生机制进行初步探讨。研究结果表明有氧训练能够使心肌的超微结构改善 ,提高心肌的cNOS活性、血浆NO水平 ,促进内皮组织舒张反应 ;大强度长时间的训练使心肌微细损伤出现 ,内皮组织损伤 ,但血浆NO水平变化不大。  相似文献   

参芪补剂对力竭性游泳小白鼠心肌线粒体抗氧化损害的功效     

孙远航 《体育成人教育学刊》2003,19(3):41-42

通过观察参芪补剂对小白鼠力竭性游泳耐力和游泳之后心肌线粒体抗氧化能力的影响，以及自行车运动员服用参芪补剂6周后运动成绩的变化情况。结果表明，参芪补剂有增强机体抗氧化损害的功效和延缓疲劳的作用。  相似文献   

Combinatorial Determination of Ischemia Modified Albumin and Protein Carbonyl in the Diagnosis of NonST-Elevation Myocardial Infarction     

Kritsanee Maneewong  Titiporn Mekrungruangwong  Saowanee Luangaram  Tomon Thongsri  Sarawut Kumphune 《Indian journal of clinical biochemistry : IJCB》2011,26(4):389-395

Ischemia modified albumin (IMA) and Protein Carbonyl (PC) have known as proteins that are modified on the similar basis of oxidative stress induced protein modification and may have diagnostic potential in acute myocardial infarction. This study aims to evaluate the ability of using IMA and PC content to diagnose Non-ST elevation myocardial infarction (NSTEMI) and efficiency of combining these two markers. Serum from NSTEMI and healthy control were determined for serum IMA and PC content. The results showed that both of serum IMA level and PC content in NSTEMI was significantly higher than that of healthy controls. However, the PC content showed greater diagnostic performance than IMA. Combinatorial determination of serum IMA level with PC content level was enhanced test efficiency. In conclusion, our finding demonstrated that IMA and PC content can be used as a diagnostic marker for NSTEMI.  相似文献   

Comparison Between Serum hsCRP and LDL Cholesterol for Search of a Better Predictor for Ischemic Heart Disease     

Datta S  Iqbal Z  Prasad KR 《Indian journal of clinical biochemistry : IJCB》2011,26(2):210-213

Acute myocardial Infarction is one of the major causes of morbidity & mortality in world and atherosclerosis is the major cause of ischemic heart disease. In order to determine the better clinical marker of atherosclerosis, we estimated serum low-density lipoprotein (LDL-C) and high sensitivity C-reactive protein (hsCRP). Hundred patients of myocardial infarction and 100 controls irrespective of age and sex were studied for these parameters over a period of 2 years. The statistical analysis showed that the serum hsCRP was significantly raised in myocardial infarction cases than controls (P < 0.01) but LDL-C was not (P > 0.05). We conclude that the serum hsCRP has better predictive value for risk of atherosclerosis.  相似文献   

脑梗死诊治临床教学体会     

郝勇  周夏俊  吴帅  蒋建明  管阳太 《科教文汇》2013,(13):84-85

随着生活方式的转变,我国脑血管病的发病率逐年上升,脑梗死不仅是神经科的常见病、多发病,而且也是我国致残率和死亡率较高的病种之一。因此,提高脑梗死的诊治水平迫在眉睫,笔者就近年来脑梗死临床教学中的点滴体会,总结如下。  相似文献   

Effects of short-term exercise training on tissue Doppler indices of left ventricular diastolic function in overweight and obese individuals     

Aletta Millen  Gavin Norton  Ingrid Avidon 《Journal of sports sciences》2013,31(5):487-499

Abstract

Although exercise training is unable to improve obesity-associated decreases in left ventricular (LV) diastolic function, as assessed using chamber function measurements, the effects on LV diastolic myocardial function, as assessed using tissue Doppler imaging (TDI), are uncertain. In 32 overweight (n = 11) or obese (n = 21), sedentary or recreationally active men and women (30–57 years), we assessed the effects of 6 weeks of exercise training either preceded (n = 16) or followed (n = 16) by a 6-week control period on TDI indices of LV diastolic function (e', e'/a' and E/e') (echocardiography). Diastolic function at baseline was comparable to that noted in overweight and obese participants from a community sample (n = 245), and 56% (n = 18) had e' values below the lower 95% CI of a lean and healthy cohort (n = 60) of the community sample. Exercise training increased peak oxygen consumption (27.4 ± 4.9 to 29.4 ± 5.8 mL · kg^–1 · min^–1, P = 0.0001), but had no effect on body mass index (P = 0.99). No changes in TDI indices of diastolic function were observed after exercise training in all the participants (e': P = 0.74, a': P = 0.98, e'/a': P = 0.85, E/e': P = 0.26), participants with abnormal e' values (n = 18)(e': P = 0.99, a': P = 0.96, e'/a': P = 0.91, E/e': P = 0.97) or obese participants (n = 21)(e': P = 0.67, a': P = 1.00, e'/a': P = 0.78, E/e': P = 0.11). In conclusion, exercise training, despite increasing cardiorespiratory fitness, is unable to improve obesity-associated decreases in LV diastolic myocardial function.  相似文献   

Non-commutability of results of highly sensitive troponin I and T immunoassays     

Lippi G  Cervellin G  Aloe R  Montagnana M  Salvagno GL  Guidi GC 《Biochemia medica : ?asopis Hrvatskoga dru?tva medicinskih biokemi?ara / HDMB》2012,22(1):127-129

Introduction:

The measurement of cardiospecific troponins is pivotal in the diagnostic and prognostic approach of patients with suspected acute myocardial infarction (AMI). However, no information is available on the commutability of results between the novel highly-sensitive (HS) troponin T (TnT) and I (TnI) immunoassays.

Materials and methods:

The study population consisted in 47 consecutive patients presenting at the emergency department (ED) of the Academic Hospital of Parma with suspected AMI. TnI was measured with the novel prototype Beckman Coulter HS-AccuTnI immunoassay on Access 2, whereas TnT was measured with the Roche HS-TnT immunoassay on Cobas.

Results:

Eight out of the 47 patients (17%) were finally diagnosed as having an AMI. The overall correlation between TnT and TnI for total patient group was acceptable (r = 0.944; P < 0.01). Nevertheless, when the analysis of data was carried out in separate groups according to the final diagnosis of AMI, two different equation results were obtained, i.e., HS-TnT = HS-AccuTnI × 0.349 + 20 (r = 0.823; P < 0.01) in non-AMI patients, and HS-TnT = HS-AccuTnI × 0.134 + 67 (r = 0.972; P < 0.01) in those with AMI.

Conclusions:

This study suggests the existence of two biological relationships between TnI and TnT in plasma, depending on the source of release from the myocardium. Moreover, the non-commutability of data between HS-TnT and HS-AccuTnI jeopardizes the clinical decision making, makes it impossible to calculate the delta or reference change value using the two biomarkers and to finally establish a reliable kinetics of troponin release from the injured myocardium.  相似文献