Exposure to static magnetic field of pregnant rats induces hepatic GSH elevation but not oxidative DNA damage in liver and kidney

BACKGROUND: The present investigation was designed to evaluate the effects of subacute exposure to static magnetic field (SMF) on some parameters indicative of oxidative stress and on oxidative DNA damage in pregnant rat. METHODS: Females rats (n = 6) were exposed to a SMF (128 mT; 1 h/day) from day 6 to day 19 of pregnancy and were allowed to deliver normally. The control group (n = 6) was not exposed to SMF. Dams were sacrificed 3 days after delivery. The effects of subacute exposure to SMF on oxidative states were assessed on the measurements of malondialdehyde (MDA), superoxide dismutase (SOD), glutathione peroxidase (GSH-Px), glutathione (GSH) and catalase (CAT). The level of 8-oxo-dG was measured using high-performance liquid chromatography coupled to electrochemical detection. RESULTS: Subacute exposure to SMF failed to alter plasma GPx, MDA, CAT and SOD respectively in liver and kidney. By contrast, SMF increased total GSH (+56%, p <0.05) and reduced GSH (+108%, p <0.05) in liver. Our results showed that the exposure to SMF did not induce oxidative DNA lesions in liver and kidney. CONCLUSIONS: The data do not provide evidence that subacute SMF exposure causes DNA damage in liver and kidney in pregnant rats. The present results suggest that hepatic GSH plays an important role in protection against SMF during pregnancy. These changes in antioxidant status (GSH) lead to some adaptive responses due to activation of systems controlling the body oxidative mechanism balance.     

Potential Oxidative Stress in the Bodies of Electric Arc Welding Operators:Effect of Photochemical Smog

To investigate whether photochemical smog emitted during the process of electric arc welding might cause oxidative stress and potential oxidative damage in the bodies of welding operators. Methods Seventy electric arc welding operators (WOs) and 70 healthy volunteers (HVs) were enrolled in a randomized controlled study design, in which the levels of vitamin C (VC) and vitamin E (VE) in plasma as well as the activities of superoxide dismutase (SOD), catalase (CAT) and glutathione peroxidase (GPX), and the level of lipoperoxide (LPO) in erythrocytes were determined by spectrophotometry. Results Compared with the average values of the above experimental parameters in the HVs group, the average values of VC and VE in plasma as well as those of SOD, CAT and GPX in erythrocytes in the WOs group were significantly decreased (P<0.005-0.0001), while the average value of LPO in erythrocytes in the WOs group was significantly increased (P<0.0001). The findings from the partial correlation analysis on the controlling of age suggested that with a prolonged duration of exposure to photochemical smog the values of VC, VE, SOD, and GPX, except for CAT, in the WOs were decreased gradually (P<0.05-0.005), the value of LPO in the WOs was increased gradually (P<0.001), and that with the ozone dose increased in the air in each worksite VC, VE, SOD, CAT and GPX decreased (P<0.005-0.001), but LPO increased (P<0.001). The findings from the reliability analysis for the VC, VE, SOD, CAT, GPX, and LPO values which were used to reflect oxidative stress and potential oxidative damage in the WOs showed that the reliability coefficients' alpha (6 items) was 0.8021, P<0.0001, and that the standardized item alpha was 0.9577, P<0.0001. Conclusion Findings in the present study suggest that there exists an oxidative stress induced by long-term exposure to photochemical smog in the bodies of WOs, thereby causing potential oxidative and lipoperoxidative damages in their bodies.     

Potential Oxidative Stress in the Bodies of Electric Arc Welding Operators： Effect of Photochemical Smog

INTRODUCTION Electric arc welding is widely used in many fields such as welding engineering, architectural engineering, automotive industry, boat and ship engineering, aerospace C…     

新生牛肝细胞生长因子的活性研究──Ⅱ．新生牛肝细胞生长因子对大鼠急性肝损伤的保护作用

研究了新生牛肝细胞生长因子（ｃＨＧＦ）对ＣＣｌ４引起的大鼠急性肝损伤的保护作用。结果表明，ｃＨＧＦ可降低ＣＣｌ４引起的急性肝衰竭大鼠的死亡率，抑制血清谷丙转氨酶（ＧＰＴ）和胆红素（Ｂｉｌ）的升高。从肝组织切片观察到ｃＨＧＦ可明显减轻ＣＣｌ＿４引起的肝细胞结构的损伤，证实ＨＧＦ是一种有效的保肝活性因子。     

金力源胶囊对大鼠脂肪肝的预防作用

目的:观察金力源胶囊对高脂饲料诱导的大鼠脂肪肝的预防作用。方法:雄性Wistar大鼠60只按体重随机分为普通饲料组、高脂模型组,金力源胶囊高、中、低剂量组和力平之对照组。于实验后第12周测定大鼠肝脏Ch,Tg,MDA,SOD,GPX,并观察肝脏组织病理学变化。结果:与高脂模型组相比,金力源各组大鼠肝脏Ch,高、中剂量组MDA和高剂量组Tg显著降低(P<0.05);各组SOD显著升高(P<0.05);低剂量组MDA,中、低剂量组Tg降低,各组GPX活力增高,但无统计学差异(P>0.05)。结论:金力源胶囊可减少高脂血症大鼠肝脏脂质沉积,降低肝脏脂质过氧化水平,恢复肝脏抗氧化能力,预防脂肪肝的形成。     

急性镉中毒大鼠睾丸氧化损伤机制的研究

目的:探究急性镉中毒睾丸氧化损伤的特点以及睾丸对镉敏感的可能机制.方法:通过观察MDA、还原态GSH、SOD、CAT、GSHpx、MT等指标系统研究大鼠肝、睾丸两器官的细胞抗氧化体系在急性镉暴露后的时间变化规律.结果:急性镉中毒使肝、睾丸两器官均发生严重的氧化损伤,细胞的抗氧化能力明显降低.但两者的变化规律不同:肝脏在6 h组MT大量表达(达正常值的6.7倍)后,上述损伤逐渐减轻;而睾丸MT表达的氧化损伤尽管在前3 h并不严重,但此后不断加剧.结论:急性镉中毒时睾丸与肝氧化损伤规律明显不同,MT在睾丸中不能被诱导表达是睾丸对镉极其敏感的原因之一.     

Inhibitory Effect of Estrogens,Phytoestrogens,and Caloric Restriction on Oxidative Stress and Hepato-toxicity in Aged Rats

Objective To investigate the protective effect of 17β-estradiol （E2）, peganum harmala extract （PHE） administration and calorie restriction （CR） treatment （60%） on oxidative stress and hepato-toxicity in aged rats. Methods Eighteen months old animals that were treated at the age of 12 months were divided into 4 groups： normal control group with free access to food, E2 treatment group, PHE treatment group and CR treatment group of the food given to control group. Six male rats at the age of 4 months were used as a reference group. Results Aging significantly decreased superoxide dismutase （SOD）, catalase （CAT） and glutathione peroxidase （GPX）, and increased lactate deshydrogenase （LDH）, gamma-glyiamyl transferase （GGT）, pbosphatase alkalines （PAL）, aspartate and lactate transaminase （AST and ALT） activities in the liver. Aging also induced an increased lipid peroxidation level, histological changes and a decreased E2 level. However, treatment with E2, PHE, and CR increased 17β-estradiol, and decreased hepatic dysfunction parameters and lipid peroxidation as well as histological changes in the liver of aged rats. Conclusion The antioxidant and hepatoprotective activity of PHE and CR is possibly attributed to its ability to increase E2 level, which as an antioxidant, acts as a scavenger of ROS. Further studies on the pharmaceutical functions of E2 in males may contribute to its clinical application.     

Hypolipidaemic and antioxidant effect of Enicostemma littorale Blume

Objective

To investigate the hypolipidaemic and antioxidant effects of aqueous leaf extract of Enicostemma littorale (E. littorale) Blume (Ens) against ethanol induced hepatic injury in albino rats.

Methods

Male albino rats of six numbers in each group were undertaken for study. Hypolipidaemic and antioxidant effect of E. littorale Blume (Ens) aqueous leaf extract at a dosage of 250 mg/kg bw was evaluated.

Results

Levels of serum and tissue cholesterol, triglycerides and free fatty acids were elevated and levels of tissue thiobarbituric acid reactive substances (TBARS) and lipid hydroperoxide were increased in ethanol treated rats. The activity levels of liver antioxidant enzymes such as superoxide dismutase (SOD), catalase (CAT), glutathione peroxidase (GPX) and glutathione-s-transferase (GST) were decreased. After adiminstration of extract of E. littorale Blume, levels of cholesterol, triglycerides and free fatty acids were decreased in serum and liver tissue, levels of TBARS and lipid hydroperoxide were decreased, and liver antioxidant enzymes were increased in liver tissue.

Conclusions

It can be concluded that the aqueous leaf extract of E. littorale Blume (Ens) has potent restorative effect on hyperlipidaemic and oxidative stress.     

通络方剂治疗糖尿病性肝损伤的疗效及其可能机制

目的观察通络方剂治疗糖尿病性肝损伤的疗效并探讨其可能的机制。方法雄性SD大鼠予链脲佐菌素60mg/kg腹腔注射,制备糖尿病模型。模型动物以随机数字表法分为4组(n=10):糖尿病对照(DM)组、通络方剂小剂量(TL)组、通络方剂中剂量(TM)组和通络方剂大剂量(TH)组。通络方剂剂量分别为每天0.5、1.0、2.0g/kg。同时取10只大鼠作为正常对照(CN)组。测定空腹血糖、血脂、血清肝功能指标;造模12周后处死大鼠取肝组织检测SOD、CAT、GSH-Px、MDA活性;透射电镜下观察肝组织超微结构改变。结果造模12周后糖尿病大鼠并发肝脏损伤,血清ALT、AST及AKP水平显著升高(P0.01);透射电镜下糖尿病大鼠肝组织超微结构出现糖尿病特征性病理变化。经通络方剂治疗后,中高剂量组糖尿病鼠血清ALT、AST水平明显下降(P0.05);糖尿病大鼠肝细胞胞质糖原颗粒减少,线粒体嵴变清晰且基质密度降低,粗面及滑面内质网形态接近正常,间质胶原纤维减少。糖尿病大鼠肝组织氧化应激水平增高,SOD和CAT活性显著降低、MDA水平显著升高(P0.01);经通络方剂治疗12周后,低中高剂量组糖尿病大鼠SOD活性均显著增加、中高剂量组糖尿病大鼠MDA水平显著下降(P0.01)。结论通络方剂对糖尿病大鼠肝损伤具有明显的治疗作用,其作用机制部分与其在一定程度上增强肝组织抗氧化酶类活性、清除脂质过氧化物有关。     

黄酮苷对赛洛西宾过氧化作用的拮抗效应

 目的 研究黄酮苷对赛洛西宾的过氧化作用的的拮抗效应。方法 将SD大鼠分为5个实验组,赛洛西宾低剂量组、赛洛西宾高剂量组、赛洛西宾低剂量+黄酮苷组、赛洛西宾高剂量+黄酮苷组、对照组。检测各组大鼠血清中的ALT、AST、BUN、MDA、SOD。结果 与空白对照组比较,赛洛西宾高剂量组超氧化物歧化酶(SOD)活力明显降低,丙二醛(MDA)含量明显增加,动物肝脏脏器系数明显增大,肝脏功能指标丙氨酸转氨酶(ALT)、心肌损伤特异性标志物天冬氨酸转氨酶（AST）和肾功能指标BUN活力水平增加;给予黄酮苷可减轻指标改变的程度。 结论 赛洛西宾可引起多脏器氧化损伤,而黄酮苷可减轻这种损害程度。     

Ozone Emitted During Copying Process -A Potential Cause of Pathological Oxidative Stress and Potential Oxidative Damage in the Bodies of Operators

INTRODUCTION Copying of references, documents, information and photos plays important roles in social, economic, business, scientific and technological affairs, however, photochemical smog emitted during this process may become risk factors inducing potential oxidative 1Correspondence should be addressed to Prof. Jun-Fu ZHOU, Second Affiliated Hospital of College of Medicine, Zhejiang University, 88 Jiefang R…     

苦荞壳提取物对高脂饲料诱导的大鼠脂肪肝的预防作用

目的: 观察苦荞壳提取物对高脂饲料诱导的大鼠脂肪肝的预防作用,探讨其机制. 方法: 雄性Wistar大鼠50只,按体质量随机分为普通饲料组、高脂模型组、苦荞壳提取物高剂量组(0.825 g/kg)、低剂量组(0.165 g/kg)和力平之对照组(0.067 g/kg). 于实验后第12 wk测定大鼠肝脏Ch, Tg, MDA浓度和SOD, GPX活力,并观察大鼠肝组织病理变化. 结果: 高脂模型组大鼠肝脏Ch, Tg, MDA含量显著高于普通饲料组(P<0.01);SOD活力显著低于普通饲料组(P<0.01);GPX活力低于普通饲料组,但无统计学差异(P>0.05). 与高血脂模型组相比,苦荞壳提取物各组大鼠肝组织Ch浓度显著降低,SOD活力显著升高(P<0.05),GPX活力升高,但无统计学差异(P>0.05);高剂量组Tg,MDA浓度显著降低(P<0.05),低剂量组Tg,MDA浓度降低,但无统计学差异(P>0.05). 力平之组大鼠肝脏Ch降低(P<0.05),Tg,MDA含量和SOD活力无显著性变化(P>0.05);而GPX活力显著降低(P<0.05). 结论: 苦荞壳提取物可减少高脂血症大鼠肝脏脂质沉积,降低肝脏脂质过氧化水平,提高肝脏抗氧化能力,预防脂肪肝的形成.     

帕珠丸对慢性酒精性肝损伤大鼠肝组织SOD、CAT活性及MDA含量的影响

目的 观察帕珠丸对酒精性肝损伤大鼠肝组织SOD、CAT活性及MDA含量的影响.方法 将42只雄性SD大鼠随机分成正常对照组、模型对照组、联苯双酯组、帕珠丸组.慢性酒精性肝损伤模型,采用56%白酒连续灌胃12周（10mL/kg·d-1）.造模成功后,分别给予联苯双酯滴丸混悬液、帕珠丸混悬液灌胃;正常对照组、模型对照组分别给予同体积生理盐水灌胃,连续灌胃3周.剖杀取样,测定大鼠肝组织超氧化物歧化酶（SOD）、过氧化氢酶（CAT）活性及丙二醛（MDA）的含量.结果 与正常对照组比较,模型组大鼠肝组织中SOD、CAT活性均明显降低（P＜0.05）,MDA含量明显升高（P＜0.05）.帕珠丸组肝组织SOD活性、CAT活性高于模型组,MDA含量低于模型组,差别有统计学意义（P＜0.05）.结论 帕珠丸可显著提高大鼠肝组织SOD、CAT活性,降低MDA含量,提示该药物能够有效地清除自由基,提高肝组织抗氧化能力.     

苦荞壳提取物对大鼠血脂的调节作用

目的:观察苦荞壳提取物对高脂血症大鼠血脂的调节作用,探讨其机制. 方法:将雄性Wistar大鼠50只按体质量随机分为普通饲料组、高脂模型组、苦荞壳提取物高剂量组(0.825 g/kg)、低剂量组(0.165 g/kg)和力平之对照组(0.067 g/kg). 于实验后第12周测定大鼠血清Ch, Tg, HDL-C, LDL-C, MDA含量, SOD, GPX活力和肝指数,并观察大鼠肝组织病理变化. 结果:高脂模型组大鼠血清Ch, Tg, LDL-C, MDA含量和肝指数显著高于普通饲料组(P<0.05); HDL-C, SOD显著低于普通饲料组(P<0.05); GPX低于普通饲料组,体质量高于普通饲料组,但无统计学差异(P>0.05). 力平之组大鼠血清Ch, Tg, LDL-C, MDA含量显著低于高脂模型组(P<0.05);GPX显著高于高脂模型组(P<0.05); HDL-C, SOD, 肝指数和体质量与高脂模型组之间无统计学差异(P>0.05). 苦荞壳提取物各组大鼠血清Ch, Tg, LDL-C, MDA和肝指数显著低于高脂模型组(P<0.05); SOD, GPX显著高于高脂模型组(P<0.05); HDL-C高于高脂模型组,体质量低于高脂模型组,但无统计学差异(P>0.05). 结论:苦荞壳提取物可降低实验性高血脂血症大鼠的血脂和肝指数,提高血液的抗氧化能力,减轻高脂饮食导致的氧化损伤.     

H_(22)肝癌小鼠择时服用人参皂甙抗氧化及免疫功能的实验研究

目的:观测择时服用人参皂甙对肝癌小鼠抗氧化能力及免疫功能方面的影响。方法:采用小鼠H22肝癌细胞实体瘤模型,分别于卯、酉时用药,检测肿瘤内总抗氧化能力、谷胱甘肽、超氧化物歧化酶(SOD)、血清IL-2、TNFα、VEGF、外周血白细胞数、脾脏及胸腺指数等指标。结果:①人参皂甙卯时用药肿瘤组织中的总抗氧化能力显著降低,SOD浓度显著升高,有显著性差异。②与模型组相比,人参皂甙可降低肝癌小鼠的血清IL-2、TNF-α和VEGF的含量,有显著性差异(P<0.05),但卯时组与酉时组之间无显著性差异(P>0.05)。③人参皂甙可使外周白细胞数升高,脾脏重量增加,有显著性差异(P<0.05),与用药时间无相关性(P>0.05),对胸腺重量无明显增重作用(P>0.05)。结论:人参皂甙可降低H22肝癌小鼠肿瘤组织的总抗氧化能力,与用药时间不同有相关趋势,并抑制机体的体液免疫功能,增强细胞免疫功能,与时间无相关性。     

Effect of Oenanthe Javanica Extract on Antioxidant Enzyme in the Rat Liver

Background:

Oenanthe javanica (O. javanica) has been known to have high antioxidant properties via scavenging reactive oxygen species. We examined the effect of O. javanica extract (OJE) on antioxidant enzymes in the rat liver.

Methods:

We examined the effect of the OJE on copper, zinc-superoxide dismutase (SOD1), manganese superoxide dismutase (SOD2), catalase (CAT), and glutathione peroxidase (GPx) in the rat liver using immunohistochemistry and western blot analysis. Sprague-Dawley rats were randomly assigned to three groups; (1) normal diet fed group (normal-group), (2) diet containing ascorbic acid (AA)-fed group (AA-group) as a positive control, (3) diet containing OJE-fed group (OJE-group).

Results:

In this study, no histopathological finding in the rat liver was found in all the experimental groups. Numbers of SOD1, SOD2, CAT, and GPx immunoreactive cells and their protein levels were significantly increased in the AA-fed group compared with those in the normal-group. On the other hand, in the OJE-group, numbers of SOD1, SOD2, CAT, and GPx immunoreactive cells in the liver were significantly increased by about 190%, 478%, 685%, and 346%, respectively, compared with those in the AA-group. In addition, protein levels of SOD1, SOD2, CAT, and GPx in the OJE-group were also significantly much higher than those in the AA-group.

Conclusion:

OJE significantly increased expressions of SOD1 and SOD2, CAT, and GPx in the liver cells of the rat, and these suggests that significant enhancements of endogenous enzymatic antioxidants by OJE might be a legitimate strategy for decreasing oxidative stresses in the liver.     

发育晚期胎鼠肝脏抗氧化酶活性的变化

目的:探讨发育晚期胎鼠肝脏中超氧化物岐化酶、过氧化氢酶和谷胱甘肽过氧化物酶活性的变化。方法:成年雌性Wistar大鼠交配后并在妊娠母鼠第17、19、20和22天取出10只胎鼠肝脏。采用pyrogallol氧化法,Aebi法和间接法分别检查超氧化物岐化酶、过氧化氢酶和谷胱甘肽过氧化物酶活性的变化。结果:发育晚期过氧化氢酶和谷胱甘肽过氧化物酶活性明显升高,CAT活性从第17天的1.8单位/mg蛋白升高到第22天的12单位/mg蛋白(P<0.05)。同时,GPx活性也从第17天的0.035单位/mg蛋白升高到第22天的0.13单位/mg蛋白(P<0.05)。此时总SOD活性则从52单位/mg蛋白下降到32单位/mg蛋白(P<0.05),CuZnSOD活性从35单位/mg蛋白下降到16单位/mg蛋白,MnSOD活性未见变化。结论:胎儿过氧化氢酶和谷胱甘肽过氧化物酶活性的增加可能有助于胎儿适应出生后体外的高氧环境,但是,没有超氧化物岐化酶活性的增加,过氧化氢酶和谷胱甘肽过氧化物酶是很难完成抗氧化功能。     

Increased oxidative stress in women with pregnancy-induced hypertension

Objective To investigate whether pregnancy-induced hypertension （PIH） may increase oxidative stress in women with PIH, and to explore the mechanisms by which PIH may increase oxidative stress and potential free radical damage. Methods Seventy women with PIH and seventy women with uncomplicated normotensive pregnancy （UNP） whose age, nutritional conditions, levels of hemoglobin and albumin were all matched, were enrolled in a randomized controlled trial. Their plasma concentrations of nitric oxide （NO）, vitamin C （VC）, vitamin E （VE）, and β-carotene （β-CAR） as well as their erythrocyte malondialdehyde （MDA）, and activities of superoxide dismutase （SOD）, catalase （CAT） and glutathione peroxidase （GPX） were determined by spcctrophotometry. Results Compared with average values of the above experimental parameters in the women with UNP, the average value of erythrocyte MDA in the women with PIH significantly increased （P〈0.0001）, while the average values of plasma NO, VC, VE, and β-CAR as well as those of erythrocyte SOD, CAT, and GPX in the women with PIH significantly decreased （P〈0.0005-0.0001）. The findings from partial correlation analysis （controlling for age） for 70 women with PIH showed that with elevated systolic blood pressure （SBP） and diastolic blood pressure （DBP）, MDA value gradually increased （P〈0.001）, and NO, VC, VE, β-CAR, SOD, CAT, and GPX values gradually decreased （P〈0.02-0.001）. The findings from reliability analysis for NO, VC, VE, β-CAR, SOD, CAT, GPX, and MDA values used to reflect increased oxidative stress and potential free radical damage in women with PIH showed that the reliability coefficients （alpha, 8 items） = 0.7062, P〈 0.0001, and the standardized item alpha = 0.9116, P〈 0.0001. Conclusion The findings in the present research suggest that pregnancy-induced hypertension can increase oxidative stress and potential free radical damage in women with pregnancy-induced hypertension.     

苦参碱注射液对小鼠急性酒精性肝损伤的保护作用

目的 探讨苦参碱注射液预处理对急性酒精性肝损伤小鼠模型的保护作用。方法 将30只昆明小鼠随机分为空白组、模型组、阳性对照组（联苯双酯滴丸125 mg/kg）、苦参碱注射液高剂量组（2.8 mg/kg）、苦参碱注射液低剂量组（1.4 mg/kg）,每组6只。各给药组按照10 ml/（kg·d）进行尾静脉注射,连续治疗14 d。第15天除空白组外,其余各组按照12 ml/kg一次性给予50%乙醇复制急性酒精性肝损伤模型,小鼠禁食不禁水,16 h后摘眼球取血并处死。采用HE染色观察小鼠肝脏病理变化,油红O染色检测肝脂肪沉积,检测血清丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）、总胆红素（T-BIL）和肝组织中丙二醛（MDA）、超氧化物歧化酶（SOD）、还原型谷胱甘肽（GSH）、过氧化氢酶（CAT）、甘油三酯（TG）水平。结果 模型组肝指数较空白组增加（P <0.05）,苦参碱高剂量组、苦参碱低剂量组、阳性对照组较模型组降低（P <0.05）。模型组血清AST、ALT、T-BIL较空白组升高（P <0.05）,阳性对照组、苦参碱高剂量组、苦参碱低剂量组较模型组降低（P <0.05）。模型组SOD、GSH、CAT较空白组降低（P <0.05）,MDA、TG较空白组升高（P <0.05）。阳性对照组、苦参碱高剂量组的GSH、CAT、SOD较模型组升高（P <0.05）,MDA、TG较模型组降低（P <0.05）。模型组肝脏脂滴数量较空白组增加（P <0.05,阳性对照组、苦参碱高剂量组、苦参碱低剂量组较模型组减少（P <0.05。结论 苦参碱注射液可以调节血清转氨酶,改善肝功能,提高抗氧化酶,改善氧化应激,对急性酒精性肝损伤有预防、治疗作用。     

兖州卷柏提取物对CCl4致小鼠肝损伤的保护作用

目的：研究兖州卷柏提取物对四氯化碳（CCl4）引起肝损伤小鼠的保护作用。方法48只KM 小鼠随机分成6组。Ⅰ组和Ⅱ组为正常对照组和肝损伤模型组,分别每天一次性灌胃20 mL／kg生理盐水;Ⅲ组每天一次性灌胃80 mg／kg水飞蓟素;Ⅳ～Ⅵ组分别每天一次性灌胃40,80,120 mg／kg兖州卷柏提取物。各组连续给药7 d。末次给药2 h后,除正常对照组外,其他各组一次性腹腔注射10 mL／kg的0．2％ CCL4。禁食不禁水18 h后,称质量;摘眼球取血,分别测定血清中谷丙转氨酶（ALT）和谷草转氨酶（AST）活性;颈椎脱臼法处死小鼠,取小鼠肝脏并称质量,另取小鼠肝脏右叶的相同部位,用10％甲醛固定,进行石蜡切片和 H‐E染色,检测肝组织病理学变化;取肝脏组织匀浆,测定总抗氧化（T‐AOC）、超氧化物歧化酶（SOD）、过氧化氢酶（CAT ）活性。结果兖州卷柏提取物各剂量组ALT和AST活性均显著低于模型组（P＜0．01）,且趋于正常小鼠水平;与模型组比较,兖州卷柏提取物各剂量组均能显著提高肝脏T‐AOC和CAT活性（P＜0．01）。除低剂量组外,其他实验组与模型组之间SOD活性均存在显著差异（P＜0．01）;兖州卷柏提取物能减轻肝组织损伤程度。结论兖州卷柏提取物对C C l4致小鼠急性肝损伤具有保护作用。