急性甲胺磷口服中毒与自由基损伤关系的初步研究

目的：探讨急性甲胺磷口服中毒（AMP）患者体内的一系列自由基异常反应及其对患者机体损伤程度的关系。方法：采用独立样本随机对照设计，用分光光度比色分析法检测了41例AMP患者和40例健康成人志愿者（HAV）的血浆过氧化脂质（LPO）、一氧化氮（NO）、维生素C（VitC）、维生素E（VitE）、β－胡萝卜（β-CAR）含量及红细胞超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、谷胱甘肽过氧化物酶（GPX）活性，结果：与HAV组的相应生化参数均值比较，AMP组的血浆LPO和NO均值显著升高（P＜0．0001），血浆Vit、VitE、β－CAR和红细胞SOD、CAT、GPX均值显著降低（P＜0．0001），对41例AMP患者红细胞乙酰胆碱酯酶（AChE)活性与上述各生化参数的直线回归和相关分析表明，随着AChE值的降低，LPO和NO值逐渐升高（P＜0．001），而VitC、VitE、β－CAR、SOD、CAT和GPX值逐渐降低（P＜0．01），逐步回归分析表明，AChE值与GPX和LPO的相关最密切，结论：AMP患者体内的一系列自由基反应病理性加剧，其中毒程度与GPX和LPO的相关最密切。     

砷对大鼠肝脏抗氧化作用影响的动态观察

为探讨砷对大鼠肝脏脂质过氧化和抗氧化能力的影响,采用亚慢性动物试验的方法对染砷不同时间大鼠肝脏脂质过氧化和抗氧化水平进行了动态观察。结果表明,在染砷第３０ｄ、第９０ｄ和第１８０ｄ大鼠肝脏丙二醛（ＭＤＡ）含量与对照组无明显差异（Ｐ〉０．０５）。提示砷对肝脏脂质过氧化反应的增强无明显作用;在染砷第３０ｄ、第９０ｄ和第１８０ｄ大鼠肝脏谷胱甘肽过氧化物酶（ＧＳＨ－Ｐｘ）活性均明显低于对照组（Ｐ〈０．０５,     

一氧化氮等自由基与脑出血关系的研究

目的探讨一氧化氮等自由基与脑出血的关系。方法检测１３３例脑出血患者和１００例健康对照者血浆一氧化氮（Ｐ－ＮＯ）、维生素Ｃ（Ｐ－ＶＣ）、维生素Ｅ（Ｐ－ＶＥ）、β－胡萝卜素（Ｐ－β－ＣＡＲ）和过氧化脂质（Ｐ－ＬＰＯ）含量及红细胞超氧化物歧化酶（Ｅ－ＳＯＤ）、过氧化氢酶（Ｅ－ＣＡＴ）、谷胱甘肽过氧化物酶（Ｅ－ＧＳＨ－Ｐｘ）活性和过氧化脂质（Ｅ－ＬＰＯ）含量。结果与对照组比较,患者组Ｐ－ＮＯ、Ｐ－ＬＰＯ、Ｅ－ＬＰＯ均值显著升高（Ｐ＜０．００１）,Ｐ－ＶＣ、Ｐ－ＶＥ、Ｐ－β－ＣＡＲ、Ｅ－ＳＯＤ、Ｅ－ＣＡＴ、Ｅ－ＧＳＨ－Ｐｘ均值显著降低（Ｐ＜０．００１）;逐步回归发现,患者病情（ＮＤＳ）与Ｐ－ＮＯ、Ｐ－ＶＣ、Ｅ－ＬＰＯ值相关最为密切,颅内血肿量与Ｐ－ＮＯ、Ｐ－ＶＥ、Ｅ－ＬＰＯ值相关最为密切。结论脑出血患者体内自由基反应病理性加剧,氧化抗氧化平衡严重失     

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.     

海洋生物面膜对中波紫外线氧化损伤的HeLa细胞的保护作用

目的 :探讨中波紫外线 (UVB)照射下天然生物膜对HeLa上皮细胞氧化损伤的保护作用。方法 :建立UVB(辐照强度为 7.15× 10 - 5J/cm2 )对HeLa上皮细胞氧化损伤模型。MTT法测定细胞活性 ;流式细胞仪测定细胞的凋亡和死亡率 ;酶法测定抗氧化酶 (GSH Px、CAT、SOD)活性和MDA含量及总抗氧化能力。结果 :离体条件下生物膜能①显著增加Hela细胞的活性 ;②提高细胞上清液中GSH Px、CAT、SOD的活性 ,降低MDA含量 ,且呈量效关系。结论 :生物膜在体外有抗UVB氧化损伤的作用。其作用机制可能是通过提高抗氧化酶含量、清除自由基等 ,减轻细胞损伤而发挥其保护作用的     

灵芝多糖对角质形成细胞氧化应激性损伤的保护作用

目的探讨灵芝多糖对H2O2诱导的角质形成细胞氧化应激性损伤的保护作用。方法采用722分光光度计测定培养的人角质形成细胞中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-PX)的活性和丙二醛(MDA)的含量。结果灵芝多糖可减少H2O2诱导角质形成细胞丙二醛的沉积,增加抗氧化酶的活性。结论灵芝多糖对H2O2诱导的角质形成细胞氧化应激性损伤有保护作用。     

重组人铜锌超氧化物歧化酶对小鼠抗氧化酶和免疫细胞的辐射防护作用

目的探讨重组人铜锌超氧化物歧化酶（ｒｈＣｕＺｎ－ＳＯＤ）的辐射防护作用。方法观察６０Ｃｏγ射线５～７Ｇｙ照射对小鼠体内抗氧化酶和免疫细胞的影响，以及给予ｒｈＣｕＺｎ－ＳＯＤ后的抗放效应。结果与照射对照组比较，ｒｈＣｕＺｎ－ＳＯＤ可明显减轻受照小鼠血液和肝细胞浆中总超氧化物歧化酶（Ｔ－ＳＯＤ）、铜锌超氧化物歧化酶（ＣｕＺｎ－ＳＯＤ）、谷胱甘肽过氧化物酶（ＧＳＨ－Ｐｘ）、过氧化氢酶（ＣＡＴ）的活性下降的程度。ｒｈＣｕＺｎ－ＳＯＤ亦可明显增强受照小鼠脾Ｔ淋巴细胞对刀豆蛋白Ａ的增殖反应和自然杀伤细胞的活性；提高小鼠全脾淋巴细胞、外周血白细胞和相对淋巴细胞计数；以及延长了３０天平均生存时间。不同给药方法中，辐射前后给药组的效果优于辐射前或辐射后给药组。结论抗氧化酶活性的降低和氧自由基作用的增强可能是电离辐射引起机体过氧化损伤，导致组织细胞功能异常的重要原因。ｒｈＣｕＺｎ－ＳＯＤ对小鼠抗氧化酶和免疫细胞以及整体均具有辐射防护作用，可能主要由于其直接清除氧自由基的功能，其次通过这种保护功能也促进其他抗氧化酶发挥了一定的协同作用。     

急性有机磷农药口服中毒与自由基变化关系的初步探讨

目的：探讨急性有机磷农药口服中毒患者体内的一系列自由基异常反应及其对患者机体损伤程度的关系。方法：采用独立样本对照设计，用分光光度比色分析法检测了58例急性有机磷农药中毒患者（AOPP）和58例健康成人志愿者（HAV）的血浆过氧化脂质（LPO）、一氧化氮（NO）、维生素C（VC）、维生素E（VE）、β－胡萝卜素（β－CAR）含量和谷胱甘肽－S－转移酶（GST）活性及红细胞超氧化物歧化酶（SOD）、过氧化氢酶（CAT）、谷胱甘肽过氧化物酶（GSH－Px）活性。结果：与HAV组各生化参数（BP）平均值（AV）比较，AOPP组血浆LPO、NO和GST的AV均升高，差异具有显著性意义（P＜0．001），血浆VC、VE、β－CAR和红细胞SOD、CAT、GSH－Px的AV均降低，差异具有显著性意义（P＜0．001）。对58例AOPP患者红细胞乙酰胆碱酯酶（AChE）活性与上述各BP的直线回归和相关分析表明，随着AChE值的降低，LPO、NO和GST值逐渐升高，均呈直线负相关（P＜0．005），而VC、VE、β－CAR、SOD、CAT和GSH－Px值逐渐降低，均呈直线正相关（P＜0．001）。对58例AOPP和58例HAV用上述BP进行判别分析的结果提示，判别正确率均为100％。结论：急性有机磷农药口服中毒患者体内的一系列自由基反应病理性加剧，采用上述参数可提高判别分析的正确率。     

Oxidative Stress in Patients With Acute Coxsackie Virus Myocarditis

To study the state of oxidative stress in patients with acute coxsackie virus myocarditis (ACM), and to investigate the pathological chain reactions of a series of free radicals and oxidative and lipoperoxidative damages in their bodies. Methods Eighty ACM patients and 80 healthy adult volunteers (HAV) were enrolled in a case-control study, in which concentrations of nitric oxide (NO) in plasma, lipoperoxides (LPO) in plasma and LPO in erythrocytes (RBC), vitamin C (VC), vitamin E (VE) and β-carotene (β-CAR) in plasma as well as activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GSH-Px) in RBC were determined by using spectrophotometric assays. Results Compared with the average values (AV) of the above biochemical parameters (BP) in the HAV group, the AV of NO in plasma, and LPO in plasma and RBC in the ACM group were significantly increased (P=0.0001), while the AV of VC, VE, β-CAR, SOD, CAT and GSH-Px in the ACM group were significantly decreased (P=0.0001). The values of the above BP were used to estimate the relative risk ratio (RR) between the ACM group and the HAY group; the RR and its 95 % confidence interval were 12.467 (5.745～27.051), 4.333(2.126～8.834), 6.517 (3.225～13.618), 3.310 (1.598～6.858), 31.000 (12.611～76.201),4.663 (2.228～9.759), 11.769 (5.440～25.462), 3.043 (1.486～6.229) and 6.594 (3.045～14.281)respectively, and their P levels ranged from 0.002 to 0.0001. The results were asfollows: D = 22.143 - 0.017SOD + 0.008NO + 0.244LPO in RBC, Eigenvalue = 13.659,Canonical correlation = 0.965, Wilks' λ = 0.068, χ2 = 420.212, P = 0.0001. The correct rate of discrimination to the ACM group and to the HAV group was 87.5% and 95.0 %, respectively,and 91.3 % of originally grouped cases was correctly classified. Conclusion The findings in this study suggested that the oxidative stress in bodies of ACM patients was severely aggravated, and marked high oxidative constituents and low antioxidants and antioxidases in the human body might increase the relative risk of inducing acute coxsackie virus myocarditis, and measuring the values of NO in plasma, SOD and LPO in RBC might increase the correct rates of discriminatory analysis of the ACM.     

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

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