热毒清对内毒素所致家兔DIC氧自由基代谢的影响

采用内毒素所致家兔弥散性血管内凝血(DIC)为模型,观察热毒清是否具有抗自由基作用。实验表明,与模型组比较,热毒清组血清、肝匀浆和线粒体LPO含量以及血清和肝匀浆XOD活性均显著降低;而肝匀浆SOD以及肝匀浆和线粒体GSH-Px活性明显升高。结果提示热毒清能有效地拮抗内毒素DIC 病理过程中增多的自由基,并通过抑制自由基生成酶和增强自由基清除酶活性而起作用。从而部分解释了热毒清保护细胞器的作用机理。     

热毒清的拆方研究——对家兔抗脂质过氧化、清除氧自由基作用的比较

为进一步探索热毒清拆方后各单味中药是否也具有抗脂质过氧化、清除自由基的作用,采用原弥散性血管内凝身(DIC)家兔模型,分别观察热毒清复方与各单味中药对DIC家兔血液超氧化物歧化酶(SOD)、过氧化脂质(LPO)影响.结果显示:热毒清组可提高SOD活性、降低LPO水平,与模型组比较具有显著性差异(P<0.01),各单味药组虽也有该二种作用,但结果不及热毒清组,与之比较具有显著性差异(P<0.05,P<0.01).结果表明,在清除氧自由基方面热毒清之效果明显优于组方内各单味药.     

锌和维生素E对肝辐射损伤治疗作用的实验研究

观察小鼠肝辐射损伤后锌（Zn)和维生素E（VE）对肝匀浆中脂质过氧化物（LPO）含量和谷胱甘肽过氧化物酶（GSH－Px）活力的影响。采用^60Coγ射线一次性全身照射（7．5Gy）小鼠0．5h后给予Zn和VE进行不同时间的保护性治疗,测定肝组织匀浆中LPO含量和GSH－Px活力。结果发现,^60Co照射小鼠后,其肝组织匀浆后LPO值显著升高（P＜0．01）,GSH－Px活力明显下降（P＜0．01）。单纯Zn治疗组,其LPO值无明显下降,而GSH－Px活力明显升高（P＜0．01）。单纯VE组,LPO值明显下降（P＜0．05）,GSP－Px活力显著增加（P＜0．01）。Zn VE联合治疗组与单纯VE组比较,在治疗后第15d,GSH－Px活力显著增加（ P＜0．01）。提示在肝辐射损伤中,补充VE对降低LPO含量、增加GSH－Px活力均有重要作用。Zn VE联合治疗在提高GSH－Px活力、阻止肝细胞脂质过氧化、保护肝细胞膜完整方面有协同作用。     

Effects of cigarette smoking and smoking cessation on plasma constituents and enzyme activities related to oxidative stress

In order to study effects of cigarette smoking and smoking cessation on plasma constituents and enzyme activities related to oxidative stress, 1255 smokers and 524 healthy non-smokers were investigated in terms of plasma levels of lipoperoxides (LPO), nitric oxide (NO), vitamin C (VC), vitamin E (VE) and beta-carotene (beta-CAR). Additionally, erythrocytes were examined to determine the level of LPO, the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px). The results showed that, when compared with the average values of the non-smoker group, the average plasma values of LPO, NO and the average erythrocyte value of LPO in the smoker group were significantly increased (P < 0. 001), while the average plasma values of VC, VE, beta-CAR, and the average erythrocyte activities of SOD, CAT, GSH-Px were significantly decreased (P < 0.001). A linear regression and correlation analysis for 65 male smokers who were all 40 years old showed that with longer smoking duration and greater daily smoking quantity, the plasma values of LPO, NO and the erythrocyte value of LPO were elevated, while the plasma values of VC, VE, beta-CAR and erythrocyte values of SOD, CAT, GSH-Px were decreased. In a group of 73 smokers who stopped smoking completely for six months, the average plasma values of LPO, NO and the average erythrocyte value of LPO decreased, although they were still significantly higher than those in the matched non-smoker group (P < 0.05). Additionally, the average plasma values of VC, VE, beta-CAR and the average erythrocyte values of SOD, CAT, GSH-Px increased, although they were still significantly lower than those in the matched non-smoker group (P < 0.05). However, after smoking cessation for one year the above average values were not significantly different from those in the matched non-smoker group (P > 0.05). This finding indicates that the markedly increased oxidative stress in smokers might gradually return to normal but only after a long period of smoking cessation. In conclusion, in the bodies of smokers a series of free radical chain reactions were gravely aggravated, the dynamic balance between oxidation and antioxidation was seriously disrupted, and oxidative stress was clearly exacerbated, which is closely related to many disorders or diseases in smokers. The present study underscored the need, urgency and importance of complete smoking cessation.     

Abnormal metabolism of nitric oxide, oxidative stress and lipoperoxidative stress in patients with acute viral myocarditis

Objective To investigate metabolic status of nitric oxide (NO) as well as oxidative and li poperoxidative stress, pathological chain reactions of a series of free radicals , and oxidative and lipoperoxidative damages in patients with acute viral myocar ditis (AVM). Methods Using a random paired control design, plasma levels of NO, lipoperoxides (LPO), vitamin C (VC), vitamin E (VE) and β- carotene (β- CAR), erythrocytic level of LPO as well as activities of erythrocytic superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH- Px) were investigated by spectrophotometr ic assays in 60 AVM patients and 60 healthy adult volunteers (HAV). Results Compared with the HAV group, plasma NO, and LPO in plasma and in erythrocyte of the AVM group significantly increased (P=0. 0001), while VC, VE, β- CAR, SO D, CAT and GSH- Px of the AVM group significantly decreased (P=0. 0001). Co mpared with the AVM group before treatment, plasma NO, and LPO in plasma and in erythrocyte of the AVM group post treatment significantly decreased (P&lt;0. 05 ), whereas plasma VC, VE and β- CAR as well as erythrocytic SOD, CAT and GSH- P x of the AVM group post treatment significantly increased (P&lt;0. 05). Conclusion The findings in this study suggested that in the AVM patients the metabolism of NO was disturbed, and the pathological chain reactions of a series of free radic als were severely aggravated, thus produced the oxidative damage and lipoperoxid ative damages. Therefore, we recommend that antioxidants at suitable dosage, su ch as VC, VE, β- CAR and others, should be given to AVM patients daily to allev iate potential oxidative and lipoperoxidative damages in their bodies.     

Oxidative stress before and after operation in patients with chronic cholecystitis containing gallstone

To study the relationship of oxidative, antioxidative constituents and antioxidases in blood with chronic cholecystitis containing gallstone, levels of lipoperoxides (LPO), nitric oxide (NO), vitamin C(VC), vitamin E (VE) and beta-carotene (beta-CAR) in plasma as well as level of LPO, activities of superoxide dismulase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in erythrocytes were investigated by spectrophotometric assay in 107 patients with this condition (PCg) and 100 healthy volunteers (HVs). Compared with HVs group, the average value of LPO and NO in plasma and that of LPO in erythrocytes of PCg group were significantly increased (P < 0.0001), while that of VC, VE and beta-CAR in plasma and the average activities of SOD, CAT and GSH-Px in erythrocytes were significantly decreased (P < 0.0001). Linear regression and correlation analysis for 107 preoperative PCg showed that the value of LPO and NO in plasma and that of LPO in erythrocytes of PCg gradually increased (P < 0.0001), representing a significant linear positive correlation. The value of VC, VE and beta-CAR in plasma and that of SOD, CAT and GSH-Px in erythrocytes of PCg gradually decreased (P < 0.0001), representing a significant linear negative correlation. Stepwise regression and correlation analysis for 107 preoperative PCg suggested that the closest correlation was observed between the course of disease and the value of NO and VC in plasma and that of SOD, GSH-Px and LPO in erythrocytes, r = 0.7306, F = 32.1408, P < 0.0001. Compared with the preoperative PCg group, the average value of LPO and NO in plasma and that of LPO in erythrocytes of the postoperative PCg group were significantly decreased (P < 0.0001). Furthermore, the average value of VC in plasma and that of SOD, CAT and GSH-Px in erythrocytes of the postoperative PCg group were significantly increased (P < 0.0001), whereas no significant difference was found between their average value of VE and beta-CAR in plasma. These findings suggested that oxidative stress was an aggravating pathological condition in PCg group. Therefore, we recommend that in treating PCg, antioxidants such as VC, VE, beta-CAR should be given in order to alleviate their potential oxidative damages.     

Experimental studies on the antagonistic effect of re du qing on endotoxin-induced damage of lysosomes and mitochondria

A rabbit endotoxic DIC model was preliminarily performed. The structures of lysosomes and mitochondria in liver cells were evidently destroyed as observed under electronic microscope, whereas those rabbits pretreated with Re Du Qing (RDQ, formerly named anti-inflammatory No. 6)--a mixture of Chinese traditional herbs providing antipyretic and detoxifying action, showed principally normal ultrastructure in liver cells. In lysosomal functional studies, the activity of the lysosomal marker enzyme--acid phosphate (ACP) was 79.0 +/- 4.7% (M +/- SD) in model group, higher than pretreated group (54.01 +/- 4.0%, P less than 0.01). Studies on the mitochondrial function showed that the significant criteria of the respiratory activity of mitochondria--respiratory control ratios (RCR) was 2.83 +/- 1.08 in model group and markedly lower than pretreated group (5.46 +/- 1.25, P less than 0.01). Mitochondrial ATPase activity (mu mol pi/min/mg pr.) was lower in model group (0.280 +/- 0.015) than in pretreated group (0.341 +/- 0.018, P less than 0.05). Lipid peroxide (LPO) in liver homogenates and serum were 1.86 +/- 0.43 n mol MDA/mg pr. and 12.26 +/- 0.84 n mol MDA/ml respectively in model group, whereas in pretreated group they gave a much lower value (1.19 +/- 0.12 and 6.55 +/- 2.97) respectively. Those data showed very significant difference between two groups (P less than 0.01). All of the above indices of pretreated group yielded values close to those of normal control group. The results of experimental study in vitro were identical to those of experimental study in vivo. These experimental studies suggested that RDQ provide antagonistic effect on endotoxin induced damage of lysosomes and mitochondria.     

幼龄和老龄小鼠肝心组织中几项生化指标变化的研究

幼龄和老龄鼠肝，心组织中过氧化脂质，超氧化物歧化酶 ，谷胱甘肽过氧化物酶测定表明，幼龄鼠肝组织中ＬＰＯ明显低于老龄鼠，心组织中ＬＰＯ两组比较不显著；     

肺良恶性疾病患者血LPO、SOD、GSH-Px测定及临床意义

测定了10例健康人、20例肺良性疾病及15例肺癌患者血LPO含量、GSH-Px活性、SOD活性及SOD/LP0比值,结果①肺癌组SOD活性,SOD/LPO比值均显著低于正常组及良性组(P<0.01;<0.05;<0.01;<0.01);②正常组及良性组SOD活性及SOD/LPO比值差别无显著性(分别P>0.05);③LPO含量及GSH-Px活性三组之间差别无显著性(分别P>0.05);④若将正常组SOD及SOD/LPO比值的均数分别减去一个标准差(x-s)作为肺癌的诊断试验阳性标准,其灵敏度分别为73.3％和73.3％,特异度为80％和70％;诊断符合率为77.1％和71.4％。上述结果提示肺癌的发生发展可能与氧自由基损伤有关。通过SOD活性及SOD/LPO比值的测定可作为鉴别肺部良恶性疾病的辅助诊断手段之一,对肺癌的辅助诊断也有一定价值。     

Oxidative Stress before and after Operation in Patients with Chronic Cholecystitis Containing Gallstone

ＩＮＴＲＯＤＵＣＴＩＯＮＣｈｒｏｎｉｃｃｈｏｌｅｃｙｓｔｉｔｉｓｃｏｎｔａｉｎｉｎｇｇａｌｌｓｔｏｎｅｉｓａｃｏｍｍｏｎｄｉｓｅａｓｅｏｆｄｉｇｅｓｔｉｖｅｓｙｓｔｅｍ.Ｓｏｍｅａｕｔｈｏｒｓｈａｖｅｒｅｐｏｒｔｅｄｔｈａｔｌｅｖｅｌｓｏｆｎｉｔｒｉｃｏｘｉｄｅ(ＮＯ)ａｎｄｌｉｐｏｐｅｒｏｘｉｄｅｓ(ＬＰＯ)ｉｎｂｌｏｏｄｏｆｐａｔｉｅｎｔｓｗｉｔｈａｃｕｔｅｃｈｏｌｅｃｙｓｔｉｔｉｓａｒｅｍａｒｋｅｄｌｙｉｎｃｒｅａｓｅｄ,ｗｈｉｌｅｔｈｏｓｅｏｆｖｉｔａｍｉｎＣ(ＶＣ)ａｎｄａｃｔｉｖｉｔｉｅｓｏ…     

魔芋葡甘聚糖对糖尿病大鼠脂质过氧化物和抗氧自由基酶类活性的影响

目的 探讨魔芋葡甘聚糖治疗病的作用机制。方法 观察魔芋甘聚糖对四氧嘧啶实验性糖尿病大鼠血溏水平以及脂质过氧化物（LPO）含量和抗氧自由基酶类活性的影响。对正常对照组、糖尿病对照组和喂饲魔芋葡甘聚糖组大鼠体内的上述指标进行检测。结果 魔芋葡甘聚糖组大鼠血糖水平明显低于对照组（P＜0．01）;血浆、胰腺和肌肉LPO含量显著低于糖尿病对照组（P＜0．05）;超氧化物歧化酶（SOD）活性在肝、胰腺和肌肉内明显高于糖尿病对照组（P＜0．05）;红细胞、肝和肌肉内的谷胱甘肽过氧化物酶（GSH－Px）活性明显高于糖尿病对照组（P＜0．05）;红细胞、肝和肌肉的谷胱甘肽过氧化物酶（GSH－Px）活性明显高于糖尿病对照组（P＜0．05）。结论 魔芋葡甘聚糖具有降低实验性糖尿病大鼠血糖的作用,其与提高抗氧自由基酶类活性及抗过氧化损伤有密切关系。     

氧化应激与多囊卵巢综合征的关系初探

目的探讨氧化应激与多囊卵巢综合症(PCOS)的关系,并观察维生素E(VE)、维生素C(VC)对PCOS的治疗作用。方法分别测定60例PCOS患者(PCOS组1和PCOS组2各30例)及30例健康自愿者(对照组)血清中脂质过氧化物(LPO)、丙二醛(MDA)、超氧化物岐化酶(SOD)、VE、VC的含量。PCOS组于抽血检测上述指标后,常规接受"炔雌醇环丙孕酮"治疗,PCOS组1同时服用抗氧化剂VE0.1gqd,VC0.2gbid,疗程3个月。在疗程结束的第7d,复查两组患者血清中LPO、MDA、SOD、VE、VC含量,并继续随访3个月,观察PCOS组1和PCOS组2患者月经自然恢复情况。结果与对照组比较,PCOS患者治疗前血清LPO、MDA含量明显升高(P均<0.05),SOD、VE、VC含量明显降低(P均<0.05);接受治疗后,PCOS组1患者血清氧化水平指标(LPO、MDA)含量较治疗前明显下降(P均<0.05),抗氧化能力指标(SOD、VE、VC)含量明显上升(P均<0.05);PCOS组2患者治疗前后血清氧化水平指标和抗氧化能力指标均无明显变化(P>0.05);治疗后,PCOS组1血清中LPO、MDA含量较PCOS组2降低(P均<0.05),SOD、VE、VC含量较PCOS组2升高(P均<0.05);PCOS组1月经自然恢复的情况明显优于组2患者(P<0.05)。结论PCOS的发病可能与氧化应激(活性氧的代谢失衡)有关,抗氧化剂可能改善PCOS患者的预后。     

二氢石蒜碱对异丙肾上腺素致大鼠心肌缺血的保护作用

目的:观察二氢石蒜碱(dihydrolycorine,DL)对大鼠心肌缺血损伤的保护作用。方法:采用异丙肾上腺素(Isoproterenol,Iso)制作大鼠心肌缺血模型,检测DL对缺血损伤后大鼠血清肌酸激酶(CK)和乳酸脱氢酶(LDH)活性、心肌组织及线粒体中超氧化物歧化酶(SOD)和谷光甘肽过氧化物酶(GSH-Px)活性及MDA含量以及心肌线粒体ATP酶活性的影响。结果:试验组大鼠缺血损伤后血清肌酸激酶(CK)和乳酸脱氢酶(LDH)活性明显升高,心肌组织与线粒体中SOD与GSH-Px活性显著下降,MDA含量明显升高,心肌线粒体ATP酶活性明显降低,与对照组比较具有显著性差异(P<0.01);随药物剂量增加(10、20、40 mg/kg)其血清CK和LDH活性逐渐降低,心肌组织及线粒体中SOD与GSH-Px活性逐渐回升,MDA含量逐渐趋于正常,ATP酶活性逐渐增加,以DL 20及40 mg/kg组作用更显著(P<0.01或P<0.05)。结论:DL对Iso致大鼠心肌缺血损伤具有保护作用,其机制可能与DL减少心肌组织脂质过氧化、提高心肌细胞抗氧化损伤的能力、减轻心肌能量代谢障碍有关。     

镉对大鼠心肌SOD活性、LPO水平及心肌细胞超微结构的作用

染镉组大鼠饲以含镉鼠饲料，对照组饲以普通鼠饲料。于第１２周末处死。取出心脏，部分做组织匀浆用于测定ＳＯＤ活性及ＬＰＯ水平；另一部分做超薄切片供电镜观察。结果表明：①染镉组ＳＯＤ活性显著低于对照组（Ｐ＜０．０１）；ＬＰＯ水平却明显高于对照组（Ｐ＜０．０１）。②染镉组大鼠心肌细胞内，部分线粒体肿胀、嵴断裂，甚至变成含有絮状物的大泡。部分肌丝排列紊乱或断裂。本文认为心肌超微结构的改变除由于镉的直接作用外，尚与镉所致ＳＯＤ活性下降以及质膜脂质过氧化水平升高有关。     

脂质过氧化与冠状动脉粥样硬化性心脏病

对31名心绞痛或陈旧性心肌梗塞的男性冠心病患者及42名健康男性进行血液检测,冠心病患者的血清过氧化脂质(LPO) 含量较健康者显著增高,而血铜,锌,硒含量及谷胱甘肽过氧化物酶(GSH—Px) 和超氧化物岐化酶(SOD) 活力均较健康者显著降低。多因素分析结果,冠心病患者血LPO与GSH-Px,SOD及硒均呈负相关;血硒含量与GSH-Px活力及血铜含量与SOD活力均呈正相关。脂质过氧化增强在冠心病的发生发展过程中可能起着重要的促进作用。     

金银花水煎剂对D-半乳糖致衰老模型小鼠的抗氧化作用

[目的]探讨金银花水煎剂对D-半乳糖致衰模型小鼠的抗氧化作用。[方法]（1）取一月龄ICR小鼠50只,随机分为对照组、衰老组、金银花高、中、低剂量组。D-半乳糖构建衰老模型过程中,金银花高（10g·kg^-1）、中（5g·kg^-1）、低（2.5g·kg^-1）剂量组每天按剂量分别灌胃。对照组和衰老组灌等量的生理盐水。连续6W后采集小鼠血清样品和各组织匀浆样品进行生化指标SOD、MDA、GSH-Px检测。[结果]42d后,衰老组小鼠出现不同程度的行动缓慢,皮毛光泽暗淡;体重低于正常组;血清、肝、肾、大脑组织中的SOD值、GSH-Px水平低于正常组;血清、肝、肾组织中的MDA含量均高于正常组（P〈0.05或P〈0.01）;以上数据说明造模基本成功。与衰老组比较,金银花给药组各项指标明显改善,金银花给药组体重增加高于衰老组（P〈0.01）;血清、肝、肾SOD值及GSH-Px水平均高于衰老组（P〈0.05或P〈0.01）,MDA含量低于衰老组（P〈0.05或P〈0.01）。[结论]金银花对D-半乳糖致衰老小鼠具有抗氧化作用,且中剂量组（5g·kg^-1）效果显著。     

Relationship between Acute Organophosphorus Pesticide Poisoning and Damages Induced by Free Radicals

~~ Relationship between Acute Organophosphorus Pesticide Poisoning and Damages Induced by Free Radicals~~     

Relationship between Acute Organophosphours Pesticide Poisoning and Damages Induced by Free Radicals

Objective To study the relationship between abnormal reactions of free radicals in bodies of patients with acute organophosphorus pesticide poisoning (AOPP) and damages induced by free radicals. Methods 58 AOPP patients and 58 healthy adult volunteers (HAV) were enrolled in an independent samples control design, in which spectrophotometric methods were used to determine the concentrations of nitric oxide (NO) and lipoperoxides (LPO) in plasma, and LPO in erythrocytes, vitamin C (VC), vitamin E (VE) and b-carotene (b-CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GSH-Px) and acetylcholinesterase (AChE) in erythrocytes. Results Compared with the average values of every biochemical parameter in the HAV group, the average values of LPO in plasma and in erythrocytes, and NO in plasma in the AOPP group were significantly increased (P=0.000001), while the average values of VC, VE, a-CAR in plasma as well as SOD, CAT, GSH-Px and AChE in erythrocytes in the AOPP group were significantly decreased (P=0.000001). The findings of Pearson product-moment correlation analysis between the value of AChE in erythrocytes and the values of above biochemical parameters for 58 AOPP patients showed that there was a significant linear negative correlation between AChE in erythrocytes and LPO, NO in plasma, and LPO in erythrocytes (P=0.000001～0.001319), while there was a significant linear positive correlation between AChE in erythrocytes and VC, VE, a-CAR in plasma as well as SOD, CAT, GSH-Px in erythrocytes (P=0.000013～0.000824). The results of discriminant analysis of above chemical parameters for 58 AOPP patients and 58 HAV suggested that the correct rates of discriminant analysis were increased to 100 % when the values of AChE and LPO in plasma and in erythrocytes, or AChE and others, were jointly used for the discriminant analysis. Conclusion The findings of the present study suggest that a series of free radical reactions in AOPP patients' bodies are pathologically aggravated, and the discriminant analysis used the above biochemical parameters could markedly increase its correct rates for AOPP patients.     

Heroin abuse and nitric oxide, oxidation, peroxidation, lipoperoxidation

To further reveal the risks of heroin abuse to human body, and to determine the injuries of oxidation, peroxidation and lipoperoxidation induced by nitric oxide and other free radicals to heroin abusers, we determined and compared plasma values of lipoperoxides (LPO), nitric oxide (NO), vitamin C (VC), vitamin E (VE), β-carotene (β-CAR) and erythrocyte values of LPO, superoxide dismutase (SOD), catalase (CAT), and glutathione peroxidase (GSH-Px) in 114 heroin abusers and 100 healthy volunteers. Using linear regression and correlation as well as stepwise regression and correlation, we also analyzed the effect of the abusing duration, and daily abusing quantity on the above-mentioned biochemical parameters in the heroin abusers. The results showed that, compared with the healthy volunteer groups, the average plasma values of LPO, and NO, and the average erythrocyte value of LPO in the heroin abuser group were significantly increased (P＜0.0001), and the average plasma values of VC, VE, and β-CAR and the average erythrocyte values of SOD, CAT, and GSH-Px were significantly decreased (P＜0.0001). Analysis of linear regression and correlation showed that with prolonged heroin abusing and with increased daily quantity in the heroin abusers, the plasma values of LPO, and NO, and the erythrocyte value of LPO were gradually increased (P＜0.001), whereas the plasma values of VC, VE, and β-CAR and the erythrocyte values of SOD, CAT, and GSH-Px were gradually decreased (P＜0.001). Analysis of stepwise regression and correlation indicated that the plasma values of NO, VC and VE were closely correlated with the abusing duration and daily abusing quantity. These results indicate that the balance between oxidation and antioxidation in the heroin abusers was seriously disturbed, and the injuries induced by nitric oxide and other free radicals, through oxidation, peroxidation and lipoperoxidation to the bodies of heroin abusers exacerbated. It is therefore necessary that in abstaining from heroin dependence, the heroin abusers should acquire sufficient quantities of antioxidants such as VC, VE and β-CAR.     

维生素E对苯并[a]芘诱导雄性大鼠的生殖毒性的保护作用

目的：探讨维生素E(vitamin E,VE)对苯并[a]芘(Benzo(a)pryene,B[a]P)诱导的雄性大鼠的生殖毒性的保护作用及其机制。方法：将60只28 d龄70~90 g Sprague Dawley (SD)大鼠随机分为空白、溶剂对照组、B[a]P组(5 mg/kg)及低(10 mg/kg)、中(50 mg/kg)、高(100 mg/kg)剂量VE联合B[a]P处理组共6组,每组各10只;连续灌胃30 d并检测各组精子质量、睾丸组织中超氧化物歧化酶(superoxide dismutase,SOD)和谷胱甘肽过氧化物酶(glutathione peroxidase,GSH-Px)活性、8-羟基脱氧鸟苷(8-hydroxy-2-deoxyguanosine,8-OHdG)和丙二醛(malondialdehyde,MDA)的含量;HE染色观察睾丸形态,采用彗星实验测定细胞DNA损伤程度。结果：与对照组相比,B[a]P组精子计数明显降低、精子畸形率、8-OHdG及MDA含量明显升高,SOD和GSH-Px活性显著下降(P<0.05);VE联合组SD大鼠的睾丸组织损伤程度明显减轻;上述各项氧化应激和DNA损伤指标也均明显改善;且随着VE剂量的增加,保护效应呈现明显的剂量-反应关系,差异均具有统计学意义(P<0.05)。结论：VE对B[a]P诱导的SD雄性大鼠生殖损害具有保护作用。