五子衍宗复方总多糖对慢性酒精中毒大鼠肝脏的保护作用

目的 在前期研究工作的基础上,对具有肝脏保护作用的中药五子衍宗复方(WZ)进行进一步的分离,考察WZ复方提取物中总多糖(TPC)对慢性酒精中毒大鼠肝脏的保护作用并探讨其可能的作用机制。 方法 本实验采用改良的Lieber-DeCarli液体酒精饲料喂养致慢性酒精性肝损伤大鼠模型,应用TPC治疗,观察血清生化指标和病理学改变,考察对肝脏氧化应激、脂质过氧化指标和细胞因子TNF-α水平及TNF-α mRNA 表达影响。 结果 TPC能够显著降低升高的肝脏指数和血清ALT、AST水平,减轻肝脏组织病理学改变;减     

低温联合还原型谷胱甘肽对肝细胞缺血-再灌注损伤中bcl-2及bax的影响作用

目的观察低温联合还原型谷胱甘肽对缺血-再灌注诱导的L02肝细胞凋亡的影响,并探索相关分子机制。方法M1T11比色法检测低温联合还原型谷胱甘肽对细胞活力的影响;试剂盒检测低温联合还原型谷胱甘肽对细胞丙二醛（MDA）水平、乳酸脱氢酶（LDH）释放及超氧化物歧化酶（SOD）活力的影响;激光共聚焦显微镜检测细胞内活性氧簇（ROS）生成;Westernblot法检测低温联合还原型谷胱甘肽对bcl-2及bax蛋白表达水平的影响。结果低温联合还原型谷胱甘肽能明显抑制缺血-再灌注诱导的L02肝细胞活力降低（P〈0．05）;低温联合还原型谷胱甘肽处理细胞能明显抑制缺血-再灌注诱导的L｜02肝细胞MDA生成增加、LDH水平增高及SOD活力降低（P〈0．05）;低温联合还原型谷胱甘肽处理细胞能明显抑制缺血-再灌注诱导的L02肝细胞内bcl-2蛋白表达水平降低及bax蛋白表达水平增高（P〈0．05）。结论低温联合还原型谷胱甘肽可能通过上调bcl-2的表达及下调bax的表达抑制缺血-再灌注诱导的L02肝细胞凋亡发生。     

复方枳椇子制剂对乙醇所致小鼠肝损伤的保护作用

目的研究复方枳椇子制剂(CPH)对乙醇所致小鼠肝损伤的保护作用。方法采用56%乙醇灌胃的方法来诱导小鼠急性肝损伤模型。将小鼠随机分为空白组,模型组,CPH(1,2,4 g.kg-1)组和阳性(XJGGK)组。测定小鼠血清中谷丙转氨酶(ALT),谷草转氨酶(AST),甲胎蛋白(AFP),以及肝组织中丙二醛(MDA),超氧化物歧化酶(SOD),谷胱甘肽过氧化物酶(GSH-Px)的含量或活性,并进行小鼠肝病理组织学检查。结果 CPH可显著降低饮酒小鼠血清中ALT、AST含量的升高,降低MDA含量,增加SOD活性和GSH-Px含量,并能改善乙醇损伤小鼠肝病理组织结构,但CPH提取物对饮酒小鼠AFP水平没有明显影响。结论 CPH对乙醇所致小鼠肝损伤具有保护作用,其机制可能与清除氧自由基和抗脂质过氧化有关,为将CPH开发成安全、有效的功能食品提供依据。     

Diallyl trisulfide (DATS) effectively attenuated oxidative stress-mediated liver injury and hepatic mitochondrial dysfunction in acute ethanol-exposed mice

The protective effects of diallyl trisulfide (DATS) on acute ethanol-induced liver injury were investigated. Mice were pretreated with DATS (30mg/kgbw) for 7d before being exposed to ethanol (4.8g/kgbw). The biochemical indices (aspartate amino transferase, AST; alanine amino transferase, ALT; triglyceride, TG) were examined to evaluate the protective effects. Mitochondria were isolated for the mitochondrial permeability transition (MPT), membrane potential (DeltaPsi(m)) and adenosine nucleotide pool assay. The lipid peroxidation (malondialdehyde, MDA), non-enzymatic antioxidant (glutathione, GSH) and enzymatic antioxidants (superoxide dismutase, SOD; catalase, CAT; glutathione reductase, GR; glutathione peroxidase, GSH-Px) were measured both in the liver homogenate and isolated mitochondria. Acute ethanol exposure resulted in the significant increase of the ALT, AST and TG levels and hepatic mitochondria dysfunction shown as MPT, and the decreases of DeltaPsi(m), ATP and energy charge (EC). However, DATS pretreatment dramatically attenuated these adverse effects. Beside this, DATS was found to significantly inhibit the increase of the hepatic and mitochondrial MDA levels, which were decreased by 33.3% (P<0.01) and 39.0% (P<0.01), respectively. In addition, DATS pretreatment markedly suppressed the ethanol-induced decrease of the hepatic GSH level and increased the mitochondrial GSH level. Moreover, the activities of the hepatic antioxidant enzymes (SOD, CAT, and GR) and the mitochondrial antioxidant enzymes (SOD, GR, and GSH-Px) were significantly boosted. Thus, we concluded that DATS dramatically attenuated acute ethanol-induced liver injury and mitochondrial dysfunction. The increase of the hepatic and mitochondrial GSH levels and the elevation of the antioxidant enzymes activities should account for the preventive effects.     

Hepatoprotective effect and antioxidant role of sun, sulphited-dried apricot (Prunus armeniaca L.) and its kernel against ethanol-induced oxidative stress in rats

The present study was carried to evaluate the hepatoprotective effect and antioxidant role of sun, sulphited-dried apricot and its kernel against ethanol-induced oxidative stress. The hepatopreventive and antioxidant potential of the plant’s supplementations were evaluated by measuring level of serum liver damage marker enzymes (AST, ALT, GGT and LDH), antioxidant defense systems (GSH, GR, SOD, GST and GPX) and MDA content in various tissues of rats. Eight experimental groups: I (control), II (20% ethanol), III (ethanol + 15% sun-dried apricot), IV (ethanol + 30% sun dried). V (ethanol + 15% sulphited-dried), VI (ethanol + 30% sulphited-dried), VII (ethanol + 15% kernel) and VIII (ethanol + 30% kernel). According to the results, the levels of serum enzymes increased significantly in the II group as compared to those of I group, but they decreased in the III, IV, V and VI groups as compared to those of II group. Also, administration of sun and sulphited-dried apricot supplementation restored the ethanol-induced imbalance between MDA and antioxidant system towards near normal particularly in tissues but not its kernel. It is concluded that apricot has a hepatoprotective effect in rats with ethanol, probably acting by promoting the antioxidative defense systems.     

细胞色素P450 2E1在依达拉奉减轻免疫性肝损伤氧化应激中的作用

目的观察细胞色素P450 2E1(CYP 2E1)在依达拉奉作用于刀豆蛋白A(Con A)致小鼠免疫性肝损伤模型中的变化。方法先期给予依达拉奉,之后用Con A腹腔注射致敏小鼠产生急性免疫性肝损伤,观察肝脏病理变化,分光光度法测血清AST和ALT浓度,肝匀浆中SOD、MDA、GSH含量,RT-PCR技术检测肝脏组织CYP 2E1 mRNA水平,Westernblot技术检测肝脏组织CYP 2E1蛋白表达水平。结果与模型组比较,依达拉奉能降低免疫性肝损伤小鼠血清中升高的ALT、AST含量;降低肝匀浆中的MDA水平,升高其降低的SOD、GSH水平;CYP 2E1 mRNA水平明显降低,CYP 2E1蛋白表达水平明显下调。结论依达拉奉对小鼠急性免疫性肝损伤具有一定的保护作用,这可能与它降低CYP 2E1的表达,清除自由基,增强机体抗脂质过氧化能力有关。     

丹参酮类化合物对小鼠应激性肝损伤的保护作用

目的研究4种丹参酮类化合物对拘束应激引起小鼠肝损伤的保护作用。方法采用拘束负荷法造成小鼠应激性肝损伤。应用赖氏法测定小鼠血浆中ALT活性，TBARS法测定血浆及肝组织匀浆中的MDA含量，抗氧化能力指数(ORAC)法测定血浆抗氧化能力指数，HPLC法测定血浆及肝组织匀浆中维生素C和GSH水平，以及ORAC法测定和观察丹参酮类化合物的体内和体外抗氧化活性。结果与拘束模型组相比，4种丹参酮类化合物均可明显降低应激小鼠血浆ALT水平，提高肝组织匀浆的抗氧化能力指数、维生素C和GSH水平，并降低MDA含量。4种丹参酮类化合物体外也显示出较强的抗氧化能力。在体内和体外实验中，二氢丹参酮的抗氧化作用均明显优于其他3种丹参酮类化合物。结论丹参酮类化合物对拘束应激引起的小鼠肝损伤具有一定的保护作用，其作用机制可能部分来自于其抗氧化活性。     

异欧前胡素对四氯化碳致小鼠急性肝损伤的保护作用

目的：研究异欧前胡素对四氯化碳（CCl₄）诱导的小鼠急性肝损伤的保护作用。方法：60只昆明种小鼠随机分为正常对照（生理盐水）组、模型（生理盐水）组、水飞蓟宾（阳性对照,16 mg·kg^-1）组和异欧前胡素低、中、高剂量（8,16,32 mg·kg^-1）组,连续灌胃给药7 d,每天1次。末次给药1 h后,除正常对照组外其余各组小鼠腹腔注射0.1% CCl₄花生油溶液诱发小鼠急性肝损伤。16 h后摘眼球取血并处死小鼠,测定肝脏指数,检测血清中丙氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）及肝组织中丙二醛（MDA）、超氧化物歧化酶（SOD）及谷胱甘肽（GSH）水平;检测肝脏线粒体中MDA水平、ATP酶活性及线粒体膜电位。结果：CCl₄诱导小鼠肝脏指数及血清ALT和AST水平显著升高,肝细胞肿胀、变性、坏死,出现明显炎性损伤;使肝组织及肝线粒体中MDA水平显著升高,SOD与GSH水平显著降低;同时导致肝线粒体中ATP酶活性显著降低,线粒体膜电位下降。而水飞蓟宾及异欧前胡素均可显著逆转CCl₄引发的这些效应。结论：异欧前胡素对CCl₄诱导的小鼠急性肝损伤具有保护作用,其机制可能与清除氧化应激产物MDA,增加细胞内抗氧化酶SOD与GSH活性及改善线粒体功能有关。     

Evaluation of the antioxidant, anti-inflammatory and hepatoprotective properties of vanillin in carbon tetrachloride-treated rats

The antioxidant and anti-inflammatory effects of vanillin are considered as important forces in the protection against liver injury and fibrosis. This study investigated the protective effects of vanillin against carbon tetrachoride (CCl(4))-induced hepatotoxicity in rat. Pretreatment with vanillin prior the administration of CCl(4) significantly prevented the decrease of protein synthesis and the increase in plasma alanine (ALT) and aspartate (AST) aminotransferases. Furthermore, it inhibited hepatic lipid peroxidation (MDA) and protein carbonyl (PCO) formation and attenuated the (CCl(4))-mediated depletion of antioxidant enzyme catalase and superoxide dismutase (SOD) activities and glutathione level (GSH) in the liver. In addition, vanillin markedly attenuated the expression levels of pro-inflammatory cytokines such as tumor necrosis factor-α (TNF-α), interleukin-1β (IL-1β) and interleukin-6 (IL-6) and prevented CCl(4)-induced hepatic cell alteration and necrosis, as indicated by liver histopathology. These findings suggest that the antioxidant and anti-inflammatory effects of vanillin against CCl(4)-induced acute liver injury may involve its ability to block CCl(4)-generated free radicals.     

野菊花总黄酮对酒精致急性肝损伤小鼠的保护作用

目的 观察野菊花总黄酮(total flavonoids Chrysanthemum indicum,TFC)对酒精致小鼠急性肝损伤的保护作用及部分机制.方法 用TFC(125、250、500 mg·kg-1)连续给小鼠灌胃7 d,末次给药后1 h,一次性灌胃酒精(50%,6 g·kg-1)致小鼠急性肝损伤模型,测定不...     

Protective effect of grape seed proanthocyanidin extract against oxidative stress induced by cisplatin in rats

Cisplatin is one of the most potent chemotherapeutic antitumor drugs. Oxidative stress has been proven to be involved in cisplatin-induced toxicity. Therefore, the present study was undertaken to examine the antioxidant potential of grape seed proanthocyanidin extract (GSPE) against the toxicity of cisplatin in male rats. Cisplatin treated animals revealed a significant elevation in plasma, heart, kidney and liver thiobarbituric acid reactive substances (TBARS), while the activities of antioxidant enzymes (GST, SOD, CAT and GSH-Px, and the levels of glutathione (GSH) were decreased. Aspartate and alanine transaminases (AST and ALT), creatine kinase and lactate dehydrogenase were significantly increased in plasma, while liver AST and ALT were significantly decreased. Cisplatin significantly increased the levels of plasma total lipid, cholesterol, urea and creatinine, and the relative weight of kidney. On the other hand, plasma total protein and albumin, and body weight were significantly decreased. GSPE reduced cisplatin-induced the levels of TBARS in plasma, heart, kidney and liver, TL, cholesterol, urea and creatinine, and liver AST and ALT. Moreover, it ameliorated cisplatin-induced decrease in the activities of antioxidant enzymes, and GSH, total protein and albumin. Therefore, the present results revealed that GSPE exerts a protective effect by antagonizing cisplatin toxicity.     

大麻二酚通过激活PPAR-γ减轻四氯化碳所致小鼠急性肝损伤

目的　探究大麻二酚（CBD）对四氯化碳（CCl4）诱导小鼠急性肝损伤的防治作用及机制。方法　42只6~8周龄C57BL/6J雄性小鼠随机分为对照组（9只）、模型组（9只）、CBD对照组（9只）、还原型谷胱甘肽（GSH）干预组（6只）、CBD干预组（9只）,其中CBD对照组、GSH干预组、CBD干预组分别腹腔注射CBD 5 mg/kg、GSH 200 mg/kg、CBD 5 mg/kg,对照组、模型组注射相同剂量的生理盐水。2 h后模型组、GSH干预组、CBD干预组分别腹腔注射含20% CCl4橄榄油5 mL/kg建立急性肝损伤模型,24 h后取血清检测丙氨酸转氨酶（ALT）、天冬氨酸转氨酶（AST）水平;HE染色观察小鼠肝组织病理变化;肝组织匀浆检测超氧化物歧化酶（SOD）、丙二醛（MDA）和GSH水平;Western blot检测肝组织过氧化物增殖物激活受体-γ（PPAR-γ）、环氧合酶-2（COX-2）蛋白的表达。结果　与对照组比较,模型组细胞损伤坏死严重,ALT、AST、MDA水平及COX-2蛋白表达水平明显升高,SOD、GSH水平及PPAR-γ蛋白表达水平明显降低（均P＜0.05）;与模型组比较,GSH干预组、CBD干预组肝脏病理损伤明显减轻,ALT、AST、MDA水平及COX-2蛋白表达水平明显降低,SOD、GSH水平及PPAR-γ蛋白表达水平明显升高（均P＜0.05）。结论　CBD对CCl4所致小鼠急性肝损伤有一定的预防作用,其机制可能与激活PPAR-γ抑制COX-2的表达,发挥抗炎抗氧化作用有关。     

地塞米松对双氯芬酸钠肝损伤的保护作用

目的探讨地塞米松(dexamethasone,Dex)对双氯芬酸钠诱导的大鼠药物性肝损伤的保护作用及部分机制。方法大鼠随机分为正常对照组、模型对照组、Dex(10 mg.kg-1)给药组。Dex(10 mg.kg-1)腹腔注射,1 h后腹腔注射双氯芬酸钠100 mg.kg-1,24 h后检测ALT和AST活性、测定肝匀浆中MDA、GSH含量和GSH-Px、SOD活性,观察肝组织病理学变化,并测肝线粒体膜电位、线粒体肿胀度、NADH水平、SDH及ATPase活性。结果模型对照组血清ALT、AST升高,光镜下可见肝小叶内肝细胞片状坏死,肝匀浆MDA含量升高,GSH、GSH-Px和SOD含量降低,肝线粒体NADH含量、SDH及ATPase活性降低。Dex可明显降低ALT、AST活性(P<0.05),减轻肝脏炎症,降低肝匀浆中MDA含量(P<0.01),升高GSH含量、GSH-Px和SOD活性以及线粒体中NADH含量、SDH及ATPase活性(P<0.01)。结论 Dex对双氯芬酸钠诱导的大鼠药物性肝损伤有保护作用,作用机制可能与减轻线粒体损伤有关。     

Evaluation of ambrein and epicoprostanol for their antioxidant properties: protection against adriamycin-induced free radical toxicity.

Ambrein and epicoprostanol were evaluated for their antioxidant potential in vitro by chemiluminescence (CL), as well as in vivo using lipid peroxides and glutathione levels as indicators in liver tissue of rats treated with adriamycin (doxorubicin) a well known free radicals producing drug. In the in vitro test, the inhibition in CL by ambrein was dose dependent. Both the high concentrations of ambrein (20-40 microg/ml) inhibited CL response significantly (P<0.05 and P<0.01, respectively) when compared to control. Similarly two low concentrations (5-20 microg/ml) of epicoprostanol inhibited CL significantly (P<0.001 and P<0.01, respectively) in comparison of DMSO control. The high concentration (40 microg/ml) of epicoprostanol behaved exceptionally and caused an increase in CL response that was more than control and significantly (P<0.001) higher than both the low concentrations. In the in vivo studies adriamycin treatment significantly (P<0.05) increased malondialdehyde (MDA) and decreased non-protein sulfhydryl (NP-SH) contents in the liver tissue of mice after 5 days treatment. Ambrein (25 and 50 mg/kg) treatment as a solo therapy at both the dose levels significantly (P<0.001) decreased MDA contents in the liver tissue. On the other hand, in the combined treatment the high dose effectively prevented any rise in MDA contents and it remained around the levels of ambrein alone. In the same experiment, adriamycin declined NP-SH contents significantly (P<0.001). Ambrein alone at both the dose levels caused a decline (P<0.01) in NP-SH contents when compared to adriamycin group. But in the combined treatment this decline in NP-SH was significantly (P<0.05) different from adriamycin alone. In the experiments dealing with epicoprostanol, adriamycin treatment increased MDA contents significantly (P<0.05) that declined significantly (P<0.001) with epicoprostanol (10- or 20mg/kg) treatment. In the same experiment co-treatment with adriamycin prevented any rise in MDA contents significantly (P<0.001) as it was observed in adriamycin alone group. Although, this treatment failed to prevent any decline in NP-SH contents either alone or in combination with adriamycin. Epicoprostanol itself had the comparative declining effect on the contents of NP-SH as seen in adriamycin group. From the results of our experiments it seems that ambrein at all concentrations behaves like antioxidant in in vitro studies but the same time it decreased NP-SH contents in vivo accompanied by a decline in MDA contents. Whereas, epicoprostanol at two low concentrations had a decline in CL indicating a possible antioxidant potential but the high concentration increased CL showing a tendency towards oxidant prospective. However, in animal studies it has shown a clear protection against adriamycin induced free radical damage.     

促红细胞生成素和还原型谷胱甘肽联用对肝缺血-再灌注损伤的保护作用

目的探讨促红细胞生成素(EPO)与还原型谷胱甘肽(GSH)联用最佳组方配比,及其对肝缺血-再灌注损伤的保护作用和机制。方法复制小鼠肝缺血-再灌注损伤模型,根据权重配方法设立不同配比组方6组,于缺血30 min-再灌注4 h后取血检测血清丙氨酸转氨酶(ALT)和天冬氨酸转氨酶(AST)活性为参考指标,确定组方的最佳理论配比。另取56只小鼠进行确证性实验,随机分为假手术组、模型组、EPO(2 000 U·kg^(-1))组、GSH(12.5 mg·kg(-1))组、GSH(12.5 mg·kg^(-1))组、EPO(1 000 U·kg(-1))组、EPO(1 000 U·kg^(-1))+GSH(6.25 mg·kg(-1))+GSH(6.25 mg·kg^(-1))低剂量组、EPO(2 000 U·kg(-1))低剂量组、EPO(2 000 U·kg^(-1))+GSH(12.5 mg·kg(-1))+GSH(12.5 mg·kg^(-1))中剂量组、EPO(4 000 U·kg(-1))中剂量组、EPO(4 000 U·kg^(-1))+GSH(25 mg·kg(-1))+GSH(25 mg·kg^(-1))高剂量组,均于手术前1 h腹腔注射生理盐水或相应药物,检测缺血30 min-再灌注4 h后各组血清AST、ALT水平和肝组织丙二醛(MDA)、总超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-P_X)活性。结果组方实验结果显示EPO对肝缺血-再灌注的保护作用更明显,是主药,GSH是辅药,两者的理论优化组方为EPO 2 000 U·kg(-1))高剂量组,均于手术前1 h腹腔注射生理盐水或相应药物,检测缺血30 min-再灌注4 h后各组血清AST、ALT水平和肝组织丙二醛(MDA)、总超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-P_X)活性。结果组方实验结果显示EPO对肝缺血-再灌注的保护作用更明显,是主药,GSH是辅药,两者的理论优化组方为EPO 2 000 U·kg^(-1)+GSH 12.5 mg·kg(-1)+GSH 12.5 mg·kg^(-1)。确证性实验结果显示,与假手术组相比,模型组血清ALT、AST水平和肝脏MDA水平升高,肝脏SOD、GSH-P_X活性降低(P<0.01)。EPO组、EPO+GSH中剂量组和EPO+GSH高剂量组血清AST、ALT活性低于模型组(P<0.01),其中EPO组高于其他两组(P<0.01)。与模型组比较,各给药组MDA含量降低,SOD活性升高(P<0.05或P<0.01)。EPO+GSH中剂量组、EPO+GSH高剂量组GSH-P_X活性高于模型组(P<0.05)。结论 EPO和GSH对肝缺血-再灌注损伤有相加保护作用,理论优化组方为EPO 2 000 U·kg(-1)。确证性实验结果显示,与假手术组相比,模型组血清ALT、AST水平和肝脏MDA水平升高,肝脏SOD、GSH-P_X活性降低(P<0.01)。EPO组、EPO+GSH中剂量组和EPO+GSH高剂量组血清AST、ALT活性低于模型组(P<0.01),其中EPO组高于其他两组(P<0.01)。与模型组比较,各给药组MDA含量降低,SOD活性升高(P<0.05或P<0.01)。EPO+GSH中剂量组、EPO+GSH高剂量组GSH-P_X活性高于模型组(P<0.05)。结论 EPO和GSH对肝缺血-再灌注损伤有相加保护作用,理论优化组方为EPO 2 000 U·kg^(-1)+GSH 12.5mg·kg(-1)+GSH 12.5mg·kg^(-1),其机制可能与抗氧化作用有关。     

芒果苷滴丸对小鼠实验性肝损伤的保护作用

目的：研究芒果苷滴丸（MDP）对小鼠实验性肝损伤的保护作用及其机制。方法：以MDP对小鼠灌胃给药,对MDP进行最大耐受量（MTD）测定;采用四氯化碳（CCl4）、D-氨基半乳糖盐酸盐（D—GaIN）诱导小鼠急性肝损伤模型;卡介苗（BCG）加脂多糖（LPS）联合诱导小鼠免疫性肝损伤模型。分光光度法检测血清中丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）含量和肝组织匀浆中超氧化物歧化酶（SOD）、丙二醛（MDA）、谷胱甘肽过氧化物酶（GSH—Px）含量,苏木精-伊红（HE）染色法对肝脏组织作病理切片法检查。结果：①以MDP对小鼠灌胃给药,其MTD为180g·kg^-1,相当于原药材36g·kg^-1。②MDP能显著降低急性、免疫性肝损伤小鼠血清中ALT、AST含量（P〈0．01）,能降低急性肝损伤小鼠肝匀浆MDA含量（P〈0．01）,升高肝匀浆SOD、GSH—PX活性（P〈0．01）,病理结果表明MDP能减轻免疫性小鼠肝损伤的肝损伤程度。结论：MDP对急性、免疫性肝损伤小鼠具有显著保护作用,其作用机制可能与抗脂质过氧化有关。     

虎杖提取物对小鼠急性肝损伤的保护作用

目的观察虎杖提取物对cch诱导的小鼠急性肝损伤的保护作用。方法采用CCl4诱导小鼠急性肝损伤模型,测定血清丙氨酸转氨酶（ALT）、天冬氨酸转氨酶（AsT）、肝组织超氧化物歧化酶（S（）D）活性及丙二醛（MDA）含量。结果cch诱导的小鼠急性肝损伤摸型,血清ALT、AST明显升高,肝组织SOD活性明显降低,MDA含量显著升高（P〈0．01）;虎杖提取物能显著降低血清ALT,AST,明显提高肝组织SOD活性,降低肝组织MDA含量（P〈0．01）。结论虎杖提取物具有降酶及抗氧化的作用。对CCh诱导的小鼠急性肝损伤具有一定的保护作用。     

排毒护肝颗粒对实验性肝损伤的保肝作用的研究

目的：探讨排毒护肝颗粒对实验性肝损伤的保肝作用。方法将实验小鼠和大鼠分为正常对照组、模型组、排毒护肝颗粒高、中、低剂量组、联苯双酯组,共6组,分别观察排毒护肝颗粒对急性肝损伤小鼠的血清谷丙转氨酶（ALT）,谷草转氨酶（AST）的影响;对慢性肝损伤大鼠的血清ALT、AST、肝组织SOD、MDA、谷胱甘肽（GSH）、羟脯氨酸（Chyp）含量的影响,并对大鼠肝组织作HE病理切片观察。以评价排毒护肝颗粒的保肝作用效果。结果排毒护肝颗粒对D-氨基半乳糖造成的急性肝损伤小鼠和CCl4造成的慢性肝损伤大鼠和ALT,AST活性升高均有显著的降低作用。排毒护肝颗粒可显著升高CCl4慢性肝损伤大鼠肝组织SOD、GSH水平,降低MDA、Hyp水平。结论排毒护肝颗粒对D-氨基半乳糖造成的急性肝损伤和CCl4造成的慢性肝损伤均有显著的保肝作用。     

舒肝安乐宁浸膏对小鼠急性肝损伤的保护作用

目的 研究舒肝安乐宁浸膏对四氯化碳（CCl4）诱导的小鼠急性化学性肝损伤的保护作用.方法 采用CCl4制备小鼠急性化学性肝损伤模型,测定血清中丙氨酸氨基转移酶（ALT）、天门冬氨酸氨基转移酶（AST）活性,肝组织中谷胱甘肽（GSH）、丙二醛（MDA）水平及谷胱甘肽过氧化酶（GSH-Px）活性,分析舒肝安乐宁浸膏对上述指标的影响.结果 舒肝安乐宁浸膏各剂量组均能升高急性化学性肝损伤小鼠肝组织GSH、GSH-Px含量（P＜0.01）,降低血清ALT、AST活性（P＜0.05或P＜0.01）与肝组织MDA含量（P＜0.05）.结论 舒肝安乐宁浸膏对CCl4所致小鼠急性化学性肝损伤具有明显的保护作用,这可能与增强谷胱甘肽系统抗氧化能力有关.     

Thymol from Thymus quinquecostatus Celak. protects against tert-butyl hydroperoxide-induced oxidative stress in Chang cells

The present work describes the protective effects of thymol isolated from Thymus quinquecostatus Celak. against tert-butyl hydroperoxide (t-BHP)-induced oxidative damage through various experiments with Chang liver cells. Thymol significantly protected hepatocytes against t-BHP-induced cell cytotoxicity as demonstrated by increased viability. Furthermore, observation of Hoechst staining, annexin V/PI staining, and expression of Bcl-2 and Bax indicated that thymol inhibited t-BHP-induced Chang cell damage. Further, thymol inhibited the loss of mitochondrial membrane potential in t-BHP-treated Chang cells and prevented oxidative stress-triggered reactive oxygen species (ROS) and lipid peroxidation (malondialdehyde, MDA). Thymol restored the antioxidant capability of hepatocytes including glutathione (GSH) levels which were reduced by t-BHP. These results indicated that thymol prevents oxidative stress-induced damage to liver cells through suppression of ROS and MDA levels and increase of GSH level.