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1.
本文通过建立小白鼠耐力运动及一次力竭性游泳的疲劳模型来揭示红景天提取物对小鼠肝组织中的SOD活性、MDA含量的影响。结果显示:红景天提取物可提高训练小鼠肝脏过氧化物岐化酶(SOD)活性和降低脂质过氧化产物丙二醛(MDA)含量。提示:红景天提取物是一种抗氧化、清除自由基效果比较明显的中药,这为开发无毒副作用的运动饮料提供科学的实验依据。  相似文献   

2.
目的:研究高强度有氧训练对运动员组织自由基代谢的影响。方法:随机选择某市某体育院校田径队中长跑组二级以上的30名运动员作为研究对象。将其随机划分成高强度有氧训练组和对照组,两组运动员分别按照各自的训练方案进行训练。结果:在高强度有氧训练后,高强度有氧训练组,肝、肾组织的SOD含量和对照组差别不大;心组织的SOD含量与对照组相比显著增大;血清的SOD含量与对照组相比非常显著性增大。高强度有氧运动组肾组织CAT含量高于对照组,但无显著性差异;心、肝组织及血清CAT含量与对照组相比具有非常显著性差异。高强度有氧运动组,心组织和血清中T-AOC含量与对照组相比无统计学意义;肾组织T-AOC含量与对照组相比显著增高;肝组织T-AOC含量与对照组相比呈非常显著性增高。高强度有氧运动组心组织中的MDA含量与对照组相比有所增大;肝、肾组织及血清中的MDA含量较对照组而言有非常显著性差异。高强度有氧运动组血清中CK、BU含量均非常显著高于对照组。高强度有氧运动组心、肝和血清SOD/MDA与对照组相比有非常显著性差异;肾组织与对照组相比无统计学意义。高强度有氧运动组心、肝、肾组织T-AOC/MDA与对照组相比显著升高;血清T-AOC/MDA无统计学意义。结论:高强度有氧训练组运动员阻止自由基代谢能力优于对照组。  相似文献   

3.
差异含氧量下的运动对心肌细胞代谢水平影响   总被引：1，自引：0，他引：1  
李静 《科技通报》2014,(3):61-63,99
目的:分析差异含氧量下运动对心肌细胞代谢水平的影响。方法:以大鼠不运动、高含氧运动训练、低含氧运动训练为运动模型,在训练前、后分别观察大鼠的情况,并检测其体重、心脏重量以及心系数的变化,用MDA和SOD试剂盒测试心肌组织中MDA含量和SOD活性,分析差异含氧量运动对大鼠心肌组织中脂质过氧化水平的影响。结果:同对照组大鼠对比,高含氧训练组大鼠体重降低(P0.01),心脏重量和心系数增加(P0.01),同对照组大鼠对比,低含氧训练组大鼠体重明显降低,心脏重量和心系数都显著提高(P0.01);同对照组对比,高含氧训练组LVSP、dp/dt max显著性下降(都是P0.01),LVEDP则显著性升高(P0.01);同高含氧训练组对比,低含氧训练组LVSP、dp/dt max显著性升高(都是P0.01),LVEDP则显著性下降,低含氧运动训练可造成大鼠心肌细胞中MDA含量明显增加,SOD活性显著下降(P0.01),高含氧运动训练未见大鼠心肌细胞MDA含量和SOD活性的显著变化。结论:低含氧运动造成的心肌细胞脂质过氧化水平降低,是过度训练引起心肌细胞代谢降低的机制之一。  相似文献   

4.
目的:通过离心运动方式创建大鼠前肢一次性力竭损伤模型,观察大鼠前肢肱三头肌细胞膜Na+-K+-ATP酶活性变化,探究力竭离心运动损伤诱发的骨骼肌细胞膜结构变化,以及导致该种变化的相关机制。方法:采用大鼠下坡一次性力竭离心跑的损伤模型,研究了大鼠前肢肱三头肌骨骼肌细胞膜Na+-K+-ATP酶活性在运动后不同时间段的变化情况。结果:Na+-K+-ATP酶活性运动后即刻较安静时显著性下降,且达到峰值;即刻后开始恢复,至运动后24小时恢复明显;运动后24小时至第5天细胞膜Na+-K+-ATP酶活性值上升无显著性趋势。结论:结合同一实验体系下关于自由基代谢情况的研究,运动后即刻Na+-K+-ATP酶活性显著性降低可能与自由基损伤有关。  相似文献   

5.
目的:分析过度运动状态下SD大鼠心血管内分泌症状特征。方法:选择雄性SD大鼠40只,依据体重随机划分成安静对照组、中等过度运动组、强过度运动组以及力竭运动组,对于运动组的大鼠,需每天在跑台上完成不同程度的8周过度运动训练,采用仿射免疫法测定大鼠心机细胞中内皮素ET、血管紧张素AGTⅡ、心机细胞膜上受体ETR等内分泌症状特征的变化情况。结果:强过度运动组大鼠的AGTⅡ含量均显著低于安静组(P0.01),力竭运动组大鼠的AGTⅡ含量与安静组无显著性差异;强过度运动组大鼠的ET含量均显著低于安静组大鼠(P0.01);力竭运动组大鼠和中等过度运动组的ET含量和安静组相比并无显著性差异;强过度运动组大鼠的ETR值显著增加(P0.05),力竭运动组大鼠的ETR值显著降低(P0.01);各运动组大鼠的ANP含量和安静组相比均显著增高(P0.05、P0.01),力竭运动组大鼠的ANP含量比安静组显著降低(P0.05)。结论:中等过度运动可明显改善内分泌功能,而过度运动阻碍内分泌系统的功能。  相似文献   

6.
罗佳佳 《内江科技》2010,31(12):28-28,35
目的：观察有氧运动或/和补充银杏叶提取物对自然衰老大鼠的总抗氧化能力（T-AOC）、丙二醛（MDA）、过氧化氢酶（CAT）等指标的影响。方法：采用32周龄的SD大鼠20只,随机分为4组,对照组（A组）,运动组（B组）,银杏叶提取物组（C组）,和运动联合补充银杏叶提取物组（D组）。干预前后观测体重、血清T-AOC、MDA、CAT含量的变化。结果：实验结果表明,通过有氧运动或/和补充银杏叶提取物的干预,C、D各组的血清T-AOC含量明显升高,血清MDA有小幅度下降（P〈0.05）,血清CAT含量无明显变化。B组各项指标含量变化不明显（P〉0.05）。结论提示,通过有氧运动和补充银杏叶提取物均能提高机体的抗氧化水平,增强抗氧化能力。  相似文献   

7.
目的:观察不同运动方式对小鼠肝脏线粒体GSH-Px的影响,筛选出有效促进机体氧化抗氧化平衡的运动方式提供理论依据。方法:选用纯系雄性C57BL/6J小鼠32只作为研究对象,并随机分为四组,经过运动训练后,GSH-Px的活性;采用实时荧光定量PCR法检测肝脏线粒体中GSH-PxmRNA表达的变化。结果:耐力组GSH-Px mRNA的表达(P0.05);抗阻组(P0.01);耐力训练组与抗阻训练组比较(P0.05)。与对照组相比,耐力组同抗阻或混合组与抗阻组比较(P0.05)。结论:在三种运动方式中效果最为明显,因此肥胖人群可选择耐力训练作为减肥的运动方式。  相似文献   

8.
目的:分析高糖量摄入与运动MDA指标的关系。方法:选取16名运动员,按照年龄、体重、运动级别随机划分成高糖摄入实验组和对照组,补充前后一个月分别进行功率自行车测试,测试总功,对运动员的RBC-GSH-PXRBC-SOD及血浆MDA的含量进行测试,分别测定不同高糖量摄入运动组和对照组中运动员机体血清中丙二醛(MDA含量,并进行运动前后自身对照比较。结果:实验组的总功、总功/LBW较补液前有明显提高(P0.05对照组各项指标均无统计学差异;摄入蔗糖后,安静时RBCMDA的含量两组间仍无显著性差异,实验组运动后即刻RBC-MDA含量明显低于对照组运动后水平(P0.05)实验组运动后RBC-SOD含量无显著性变化,实验组RBC-GSH-Px含量较运动前有明显提高(P0.05)同对照组无差异;摄入蔗糖后实验组RBC-GSH-Px的升高幅度显著高于对照组(P0.05)。结论:高糖量摄入增强运动自由基的代谢水平,提高了运动员的运动能力,抑制运动引发的自由基损伤。  相似文献   

9.
《科技风》2021,(28)
目的:探讨有氧运动对高脂饮食肥胖大鼠胸主动脉血管eNOS mRNA表达水平及自由基代谢作用。方法:根据饮食结构不同将SD大鼠随机分为3组(n=10),正常饮食组(CN)、高脂蛋白组(HD)、高脂蛋白复合有氧运动组(HE),HE大鼠每天游泳1次,90min/次,每周运动5天,持续8周。取心肌及胸主动脉。检测SD大鼠体重,LEE’S指数,心肌中超氧化物歧化酶(SOD)、丙二醛(MDA),胸主动脉血管eNOS mRNA表达水平的影响。结果:与正常饮食组相比,高脂蛋白组心肌中的MDA含量升高,SOD含量降低(P0.01)。与高脂蛋白组相比,高脂蛋白复合有氧运动组心肌MDA含量降低,SOD含量增加(P0.01)。正常饮食组eNOS mRNA基因表达水平显著高于高脂蛋白组(P0.05),高脂蛋白复合有氧运动组eNOS mRNA基因表达水平高于高脂饮食组(P0.05)。结论:有氧运动可改善胸主动脉eNOS mRNA表达水平,其机制可能与增强抗氧化酶活力、减少自由基产生有关。  相似文献   

10.
目的:研究匙羹藤总皂苷对大鼠肝脏超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、和脂质过氧化物(LPO)作用的影响。方法:通过硫代巴比妥酸(TBA)分光光度法测定大鼠肝脏脂质过氧化(LPO)的二级分解产物丙二醛(MDA)的含量,以考察匙羹藤总皂苷对实验大鼠肝脏LPO的作用影响,采用黄嘌呤氧化酶法测定SOD活力,钼酸铵显色法测定CAT的活力,考察匙羹藤总皂苷对实验大鼠肝脏SOD和CAT的作用大小。结果:与对照组比较匙羹藤总皂苷在1.0mg/ml~6.0mg/ml浓度范围可抑制大鼠肝脏LPO作用;在1.0mg/ml~6.5mg/ml浓度范围内可提高大鼠肝脏SOD和CAT的活性。结论:匙羹藤总皂苷可以提高大鼠肝脏SOD和CAT的活性,降低MDA的产生。  相似文献   

11.
Activities of antioxidant enzymes involved oxygen free radical metabolism in the liver and lung were investigated in 2,4, and 30 months old Wistar albino rats. The levels of SOD, GSH-Px, GSH and protein-SH were decreased whereas MDA increased, in the liver as well as the lung of the old rats (30 months old) compared to the young rats (2 and 4 months old). The data suggests that the failure of the free radical protective mechanism may be one of the important contributors to the process of ageing.  相似文献   

12.
Free radical mediated pathological processes may have a role in schizophrenia. Free radicals (oxy radicals, such as superoxide, hydroxyl ions and nitric oxide) cause cell injury, when they are generated in excess or when the antioxidant defense is impaired. Both these processes seem to be affected in schizophrenia. In this study we investigated erythrocyte superoxide dismutase (SOD) and catalase (CAT) activities as antioxidant enzymes, malondialdehyde (MDA) as a sign of lipid peroxidation in schizophrenic patients. Activities of superoxide dismutase, catalase and malondialdehyde were greater in patients compared with the control group which may reflect increased oxidative stress in the brain tissue of schizophrenics. In the patient group erythrocyte SOD and CAT activities were weakly negative correlated with MDA concentration. These data reveal that antioxidant defense mechanisms might be impaired in schizophrenic patients. These findings also provide a theoretical basis for the development of novel therapeutic strategies, such as antioxidant supplementation.  相似文献   

13.
张东升 《中国科技信息》2007,(17):191-191,193
目的:探讨稳恒磁场对家兔谷胱甘肽过氧化物酶(GSH-Px)和过氧化氢酶(CAT)活性的影响。方法:将20只家兔随机分为实验组与对照组。实验组每天进行一次磁处理,每次120min。稳恒磁场利用亥姆霍兹线圈产生,中心强度为22Gs。8周后测定两组家兔血清中GSH-Px和血液中CAT的活性。结果:实验组GSH-Px活性为(1426.50士156.72)活力单位/ml,CAT活性为(67.01士12.23)活力单位/L。对照组GSH-Px活性为(1178.25士270.36)活力单位/ml,CAT活性为(54.34士6.42)活力单位/L。实验组GSH-Px与CAT活性明显升高(P<0.05)。结论:稳恒磁场能够增强GSH-Px和CAT的活性,提高机体处理自由基的能力,增加机体的抵抗能力,具有一定的抗哀老功能。  相似文献   

14.
The effect of the oral administration ofVitex negundo leaf extract on the levels of enzymic and non-enzymic antioxidants were studied in the adjuvant induced arthritic (AIA) rats The levels of antioxidant enzymes such as SOD, CAT, GPx, G6PD, GSH and Vit-C were estimated in various groups of the experimental rats. It was observed that the antioxidant enzyme levels in the AIA were significantly low when compared to normal rats. A significant decrease in enzymic antioxidant—SOD, CAT, GPx, G6PD and non-enzymic antioxidant—GSH, Vit-C were observed in the liver of AIA rats compared to the normal rats. These results suggest that the leaf extract ofVitex negundo possesses antioxidant activity.  相似文献   

15.
Pretreatment of an ethanolic extract of leaf ofPiper betle linn at a dose of 200mg/kg body weight, orally administered to rats for ten consecutive days, was found to possess a significant protective action against gastric lesions induced by indomethacin. The extract pretreatment resulted in significant increase in superoxide dismutase (SOD) and catalase (CAT) activity, increase in mucus, hexosamine and total thiol group content, but marked reduction in oxidatively damaged protein and peroxidised lipid levels as compared to untreated ulcerated control. The extract was also found to possess both superoxide and hydroxyl free radical scavenging action. The present observations establish the efficacy of the extract in prevention of experimentally induced peptic ulcer by indomethacin and antioxidant property appears to be predominantly responsible for such cytoprotective activity in the experimental model.  相似文献   

16.
The aim of this study is to evaluate the oxidative stress in predialysis, hemodialysis (HD) and peritoneal dialysis patients and to test the effects of antihypertensive drugs and volume control on oxidative stress parameters. The study was composed of five groups as follows: control group (n = 30), predialysis group (n = 30), peritoneal dialysis group (n = 30), hemodialysis group, (normotensive with strict volume control, n = 30), hemodialysis group (normotensive with medication, n = 30). Plasma malondialdehyde (MDA), erythrocyte superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSHPx) and routine biochemical parameters were studied in all patients. Hemodialysis patients with strict volume control (HDvc) had lower levels of MDA than other patient groups (p < 0.001), and CAT, SOD values had highest level other patient groups (p < 0.001). The treatment of hypertension with strict volume control in chronic renal failure patients causes less damage to the antioxidant capacity.  相似文献   

17.
This study aimed to elucidate the mechanisms of melatonin to manage neurological damage in Alzheimer’s disease (AD) induced in ovariectomized rats. Forty adult female rats were enrolled in our study and were classified as; gonad intact control, ovariectomized control group, ovariectomized rats received melatonin, ovariectomized rats injected with AlCl3 to induce AD and AD-induced rats treated with melatonin. Hydrogen peroxide (H2O2), malondialdehyde (MDA), total antioxidant capacity (TAC), superoxide dismutase (SOD), catalase (CAT), B cell lymphoma 2 (Bcl-2), brain derived neurotrophic factor (BDNF), acetylcholinesterase (AchE) and acetylcholine (Ach) were estimated in the brain tissues of the different groups. Treatment of AD-induced rats with melatonin produced marked improvement in the most studied biomarkers which was confirmed by histological investigation of the brain. In Conclusion, melatonin significantly ameliorates the neurodegeneration characteristic of AD in experimental animal model due to its antioxidant, antiapoptotic, neurotrophic and anti-amyloidogenic activities.  相似文献   

18.
Retinopathy of prematurity (ROP) is a major cause of blindness in children. Free radicals are implicated in the development of this retinopathy. We studied the role of free radicals in ROP and enrolled 60 preterm neonates at 30–32 weeks age. Thirty neonates predisposed to development of ROP, were placed in study group and 30 normal neonates in control group. Malondialdehyde and antioxidant enzymes superoxide dismutase (SOD) and glutathione peroxidase (GPX) were measured in blood spectrophotometrically. Both the groups were followed-up to 40–42 weeks age. Serum MDA levels, erythrocyte SOD and plasma GPX were significantly high in study group at 30–32 weeks as compared to control group. At follow up visit significant increase in MDA level and decrease in SOD and GPX level among the study group was seen. This disturbance in equilibrium of oxidant and antioxidant status initiates an inflammatory process in retinal tissue leading to development of ROP.  相似文献   

19.
Hemodialysis represents a chronic stress status for its recipients. Many hypotheses state that this may be associated with oxidative stress. Thus, there may be deficiency of antioxidants like erythrocytic superoxide dismutase, catalase, vitamin E or increased generation of free radicals like superoxide anions. A study was carried out to investigate oxidant and antioxidant status in chronic renal failure patients undergoing hemodialysis and effect of vitamin E supplementation on these two status. Blood samples were collected from patients before and after hemodialysis and from controls. The samples were analyzed for quantitation of MDA as index of lipid peroxide, nitric oxide, vitamin E, vitamin C and enzymatic antioxidants namely erythrocyte SOD and catalase. As compared to controls, the levels of serum MDA were significantly increased and activities of erythrocyte SOD and catalase, levels of serum nitric oxide, serum vitamin E and plasma vitamin C were significantly decreased both before and after hemodialysis. The efficiency of vitamin E therapy in hemodialysis patients was assessed by re-evaluating oxidant and antioxidant status of same patients after supplementation of vitamin E. Vitamin E supplementation caused decrease in serum MDA and increase in levels of serum nitric oxide, vitamin E, vitamin C and activities of erythrocytic SOD and catalase. Our results suggest the presence of oxidative stress and the possible preventive role of vitamin E therapy in hemodialysis patients.  相似文献   

20.
Quercetin (QE), one of natural flavanoid group, was widely distributed as a secondary metabolite in plant kingdom. It has been believed that oxidative stress plays a role in the pathogenesis of diabetes mellitus (DM). The aim of the present study was the evaluation of possible effects of QE on blood glucose and antioxidant enzymes in experimental streptozotocin (STZ)-induced diabetes in rats. STZ was injected intraperitoneally with single dose of 50 mg/kg for diabetes induction. QE (15 mg/kg bw day, intraperitoneal (i.p.) injection) was injected for 3 days prior to STZ administration; these injections were continued to the end of the study (for 25 days). Glucose tolerance test and random plasma glucose were done for all animals. Cellular antioxidant enzymes such as glutathione peroxidase (GSHPx), superoxide dismutase (SOD) and catalase (CAT) activities were measured in pancreatic homogenates. Quercetin had no effect on plasma glucose level of normal animals but its pre- treatment was able to prevent diabetes induced by single intraperitoneal injection of streptozocintreated rats. Antioxidant enzyme activity significantly decreased in STZ induced diabetic group. QE treatment significantly increased the antioxidant enzyme activities. It could be concluded that quercetin, a flavonoid with antioxidant properties, exerting its beneficial antidiabetic effects.  相似文献   

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