苗药阿锐布提取物对实验性小鼠急性肝损伤的保护作用

目的 探讨苗药阿锐布水提物对实验性小鼠急性肝损伤的保护作用及其机制。方法 采用四氯化碳(CCl₄)构建小鼠急性肝损伤模型，即将60只KM小鼠分为空白组、模型组、联苯双脂(DDB)组、阿锐布低剂量组、阿锐布中剂量组及阿锐布高剂量组，每组10只。正常组和CCl4模型组给予生理盐水，阿锐布低、中、高剂量组均按每天100 mg/kg^-1、200 mg/kg^-1及400 mg/kg^-1灌胃给药，连续14 d。于末次给药2 h后，除正常组外，其余各组小鼠按 20 mL/kg^-1的剂量皮下注射0.3% CCl₄，16 h后称体重，摘眼球取血；后处死小鼠，取出肝脏并称重，肉眼观察颜色及形态变化，检测各组小鼠血清中丙氨酸氨基转移酶(ALT)、天门冬氨酸氨基转移酶(AST)及肝组织匀浆中超氧化物歧化酶(SOD)、丙二醛(MDA)水平，计算肝脏指数和HE染色法作各组小鼠肝组织病理切片观察。结果 一定剂量的阿锐布水提物能显著降低小鼠肝脏指数(P < 0.05或P < 0.01)、血清ALT和AST水平(P < 0.01)；提高肝组织匀浆中SOD水平(P < 0.01)，降低MDA水平(P < 0.01)。结论 适宜剂量的阿锐布水提物对CCl₄诱导的实验性小鼠急性肝损伤具有良好的保护作用，作用机制可能与其所含活性物质的抗氧化作用有关。     

北柴胡正丁醇部位保肝作用及其化学成分特征初步研究

目的:研究北柴胡正丁醇萃取部位对小鼠急性肝损伤的保护作用并对其化学成分特征进行初步研究.方法:采用腹腔注射四氯化碳诱导小鼠急性肝损伤,以柴胡正丁醇萃取部位高、中、低剂量(20,10,4 g·kg-1)同时预防给药7d,检测空白组、模型组、对照组、不同剂量柴胡正丁醇萃取部位组小鼠血清丙氨酸转氨酶(ALT),天冬氨酸转氨酶(AST)活性,同时测定肝组织中丙二醛(MDA)含量和超氧化物歧化酶(SOD)活性;建立并分析北柴胡正丁醇萃取部位HPLC色谱图.结果:北柴胡正丁醇萃取部位是以柴胡皂苷a和柴胡皂苷d为主要成分的柴胡总皂苷,可有效抑制造模小鼠血清中ALT,AST的升高(P＜0.05),同时可提高造模小鼠肝组织中SOD的活力,降低肝组织中MDA的含量(P＜0.05).结论:北柴胡正丁醇萃取部位对于小鼠急性肝损伤具有保护作用,其化学成分以柴胡皂苷类为主.     

马齿苋对四氯化碳诱导小鼠急性肝损伤的保护作用

目的:探讨马齿苋保护四氯化碳(CCl4)所致急性肝损伤的作用及机制。方法:60只昆明小鼠随机分为正常组、模型组、水飞蓟宾组(200 mg·kg^-1)及马齿苋高、中、低(2,1,0.5 g·kg^-1)剂量组,连续灌胃给药5 d,除正常组小鼠外,各组小鼠腹腔注射0.2%CCl4花生油溶液10 mL·kg^-1,建立急性肝损伤模型。造模23 h后,收集血清和肝脏组织。全自动分析法检测小鼠血清肝功能指标;取肝脏组织进行苏木素-伊红(HE)染色,观察肝脏病理学变化;应用转录组测序技术(RNA-seq)分析差异基因及功能富集情况,并利用实时荧光定量聚合酶链式反应(Real-time PCR)检测细胞色素P450家族成员(CYP)26A1,CYP2C37,CYP2C44,CYP2C50,CYP2C54 mRNA的表达。结果:与正常组比较,模型组小鼠的丙氨酸氨基转移酶(ALT),天冬氨酸氨基转移酶(AST),乳酸脱氢酶(LDH),总胆红素(TBIL),丙二醛(MDA)水平均明显升高(P<0.05),甘油三酯(TG)和超氧化物歧化酶(SOD)活性明显降低(P<0.05);与模型组比较,马齿苋显著降低急性肝损伤小鼠ALT,AST,TBIL,MDA水平(P<0.05),明显升高SOD活性(P<0.01),降低小鼠肝脏组织损伤程度;与正常组比较,急性肝损伤小鼠的CYP2C44,CYP2C50 mRNA表达明显降低(P<0.05);与模型组比较,马齿苋各剂量组小鼠的CYP26A1,CYP2C37,CYP2C44,CYP2C50,CYP2C54 mRNA表达明显升高(P<0.05,P<0.01)。结论:马齿苋对CCl4所致急性肝损伤具有显著的保护作用,其作用机制可能与调节细胞色素P450相关基因有关。     

Protective effect of Rhinax,a herbal formulation,against CCl4-induced liver injury and survival in rats

Rhinax, a herbal formulation, was investigated for its protective activity against CCl₄-induced liver injury and survival in rats. Oral administration of Rhinax at a dose of 80 mg/kg significantly reduces the hepatotoxic effects of CCl₄. It also significantly improves the survival of rats at a dose of 160 mg/kg. On the basis of these observations, we conclude that Rhinax possesses anti-hepatotoxic activity and that the observed activity may be due to the increased activity of cytochrome P450, thereby exerting an inhibitory effect on reductive pathways of CCl₄.     

叶下珠抗肝细胞损伤作用机制

叶下珠能明显降低CCl4引起的小鼠血清ALT的升高,抑制肝脏MDA的生成。叶下珠体外与大鼠肝细胞共同孵育,能抑制CCl4所致肝细胞膜流动性降低,降低〔Ca²⁺〕i浓度。结果提示,叶下珠保护肝脏损伤作用可能与其抗指质过氧化和膜保护作用有关。     

The protective and curative action of Withania frutescens leaf extract against CCl4-induced hepatotoxicity

We studied the protective and curative action of an ethanol extract of Withania frutescens leaves against CCl₄-induced hepatotoxicity. Hepatoprotective activity was evaluated in terms of the LD₅₀ of CCl₄, the modification of Nembutal-induced sleep, the action on bile flow, serum transaminase and hepatic fatty acids levels and a histopathological study of liver tissue. Curative action was assessed by measuring the duration of Nembutal-induced sleep and with a histopathological study of liver tisue. The findings indicate that the leaf extract has both preventative and curative activity against CCL₄-induced liver damage.     

姜黄素对小鼠实验性肝损伤的保护作用

目的 :探讨姜黄素对肝脏损伤的保护作用。方法 :分别建立四氯化碳、D-半乳糖胺及卡介苗加脂多糖诱导小鼠肝脏损伤模型 ,以测定血清谷丙氨酸转换酶 (ALT)、谷草氨基酸转换酶 (AST)、一氧化氮 (NO)和肝匀浆丙二醛 (MDA)含量为指标观察姜黄素对肝脏损伤的保护作用。结果 :姜黄素与阳性对照药联苯双酯相仿 ,均能明显降低动物模型的血清ALT ,AST ,NO和肝匀浆MDA含量。结论 :姜黄素具有明显的保肝作用。     

Amelioration of oxidative stress by dandelion extract through CYP2E1 suppression against acute liver injury induced by carbon tetrachloride in sprague‐dawley rats

The protective effects of common dandelion leaf water extract (DLWE) were investigated by carbon tetrachloride (CCl₄) induced hepatitis in Sprague‐Dawley rats. The animals were divided into five groups: normal control, DLWE control, CCl₄ control, and two DLWE groups (0.5 and 2 g/kg bw). After 1 week of administering corresponding vehicle or DLWE, a single dose of CCl₄ (50% CCl₄/olive oil; 0.5 mL/kg bw) was administered 24 h before killing in order to produce acute liver injury. The DLWE treatment significantly decreased CCl₄‐induced hepatic enzyme activities (AST, ALT and LDH) in a dose dependent manner. Also, the obstructed release of TG and cholesterol into the serum was repaired by DLWE administration. Hepatic lipid peroxidation was elevated while the GSH content and antioxidative enzyme activities were reduced in the liver as a result of CCl₄ administration, which were counteracted by DLWE administration. Furthermore, the hepatocytotoxic effects of CCl₄ were confirmed by significantly elevated Fas and TNF‐? mRNA expression levels, but DLWE down‐regulated these expressions to the levels of the normal control. Highly up‐regulated cytochrome P450 2E1 was also lowered significantly in the DLWE groups. These results indicate that DLWE has a protective effect against CCl₄‐induced hepatic damage with at least part of its effect being attributable to the attenuation of oxidative stress and inflammatory processes resulting from cytochrome P450 activation by CCl₄. Copyright © 2010 John Wiley & Sons, Ltd.     

鹿茸多肽对四氯化碳所致小鼠急性肝损伤的保护作用

 目的观察梅花鹿茸多肽(VAP)对四氯化碳(CCl4)所致小鼠急性肝损伤的保护作用。方法腹腔注射四氯化碳制备小鼠急性肝损伤模型,检测血清谷丙转氨酶(ALT)、谷草转氨酶(AST)活性和白蛋白(ALB)含量;同时测定肝组织中丙二醛(MDA)含量和超氧化物歧化酶(SOD)、谷光甘肽(GSH)的活性。在光学显微镜下观察肝脏病理组织学变化。结果与四氯化碳模型组比较,VAP可使血清ALT,AST活性明显降低(P<0.01),但对ALB的含量无明显影响(P>0.05);同时VAP可使肝组织中MDA的含量明显下降(P<0.01),GSH含量有所升高,SOD活力明显增强(P<0.01)。形态学观察,VAP能明显改善肝组织的病理学改变。结论VAP对四氯化碳所致小鼠急性肝损伤具有保护作用。     

延胡索乙素对四氯化碳致小鼠肝损伤的保护作用

目的:研究延胡索乙素对小鼠肝损伤的保护作用。方法:建立四氯化碳诱导小鼠肝损伤模型,以测定血清谷丙转氨酶(ALT)、谷草转氨酶(AST)和肝组织丙二醛(MDA)含量和肝组织超氧化物歧化酶(SOD)活性以及肝组织形态变化为指标观察延胡索乙素对肝损伤的保护作用。结果:延胡索乙素能明显降低肝损伤小鼠的血清ALT,AST和肝匀浆MDA含量,肝匀浆SOD活性提高,肝组织变性明显减轻,肝组织结构完好。结论:延胡索乙素具有明显的保护肝脏作用,其机制可能与其抗氧化作用有关。     

忍冬叶总黄酮对四氯化碳致急性肝损伤小鼠的保护作用

目的:研究忍冬叶总黄酮(TFLLJ)对四氯化碳(CCl4)致小鼠急性肝损伤的保护作用。方法:将60只昆明种小鼠随机分为正常组、模型组、TFLLJ高、中、低剂量组(400,200,100 mg.kg-1)和联苯双酯组(150 mg.kg-1),除正常组和模型组外,其余各组小鼠每日ig给药1次,共10 d。末次给药1 h后,除正常组外其余各组ip 0.1%CCl4花生油溶液(0.01 mL.g-1)1次,造成急性肝损伤。测定血清中谷丙转氨酶(ALT)和谷草转氨酶(AST)含量,计算肝脏指数(LI),测定肝组织超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量,观察肝组织病理改变。结果:TFLLJ(400,200,100 mg.kg-1)剂量组可降低CCl4致小鼠肝损伤血清中的ALT和AST(P<0.01或P<0.05)。可降低小鼠肝组织中MDA和SOD活性(P<0.01或P<0.05)。TFLLJ各剂量组能明显改善肝组织的病理变化。结论:忍冬叶总黄酮对CCl4致小鼠急性肝损伤具有一定的保护作用,可能与抗脂质氧化有关。     

Fuzheng Huayu inhibits carbon tetrachloride-induced liver fibrosis in mice through activating hepatic NK cells

Aim of the study

Fuzheng Huayu (FZHY) is a Chinese compound herbal preparation which consists of six Chinese herbs. This study examines the preventative effects of FZHY on liver fibrosis induced by carbon tetrachloride (CCl₄) and explores its possible mechanisms of action.

Materials and methods

Liver fibrosis was induced in male C57BL/6N mice by injecting a 10% CCl₄ solution intraperitoneal twice a week for six weeks. After 6 weeks of treatment, serum ALT and AST assay, liver tissue histological examination and immunostaining were carried out to examine the liver function and fibrosis degree. The expression levels of alpha-smooth muscle actin (SMA) were measured by quantitative real-time PCR and western blot. Hepatic natural killer (NK) cells were isolated from liver and evaluated by FACS.

Results

Upon pathological examination, the FZHY-treated mice showed significantly reduced liver damage. The expression of α-SMA increased markedly upon treatment with CCl₄ and the increase was reversed by FZHY treatment. FZHY treatment also enhanced the activation of hepatic NK cells and the production of interferon-gamma (IFN-γ). The protective effects of FZHY were reversed in the mice that were depleted of NK cells by anti-ASGM-1 Ab treatment.

Conclusions

FZHY can efficiently inhibit CCl₄-induced liver fibrosis. Furthermore, the depletion of NK cells attenuates the protective effects of FZHY. We conclude that FZHY could be an effective drug for liver fibrosis, and its mechanism of action involves the activation of hepatic NK cells.     

Stimulation of tissue repair by Mikania cordata root extract in carbon tetrachloride-induced liver injury in mice

Experiments were carried out to determine the efficacy of the Mikania cordata root extract in the tissue repair activities in mice intoxicated with carbon tetrachloride (CCl₄). We have estimated total plasma protein, albumin, globulin, blood urea, hepatic microsomal ribonucleic acid (RNA) and cytochrome P-450 level. Acute single intraperitoneal administration of CCl₄ (1 mL of 20% v/v in olive oil/kg body weight) decreased albumin and increased globulin level and thereby reduced the albumin-globulin ratio. A lower blood urea level was also noticed after treatment of mice with CCl₄. A 1 h pretreatment with the root extract tended to reverse these features which were found to be dose-dependent, but the results were statistically significant in the dose range of 100–150mg/kg. The M. cordata root extract (at 150mg/kg) dramatically improved the level of hepatic microsomal RNA (42.2%; p<0.001) and cytochrome P-450 content (70.2%; p<0.001) that were altered in CCl₄-induced liver damage. Based on these observations, it is considered that M. cordata root extract may alleviate the deleterious effects of CCl₄, protect the liver cells and activate the hepatic reticuloendothelial system-mediated defence mechanism as well as the regeneration of protein synthesis.     

Reversing effects of lignans on CCl4-induced hepatic CYP450 down regulation by attenuating oxidative stress

Oxidative stress has been proved to be a critical reason of regulating CYP450s under hepatic injury status. The study was aimed to investigate the effect of pretreatment of schisandra lignan extracts (SLE) and dimethyl diphenyl bicarboxylate (DDB) on expressions and activities of the main liver P450 isoenzymes in CCl₄ induced liver injury rats and their anti-oxidative effects on both CCl₄ induced liver injury rats and a CCl₄ induced HepG2 cell injury model. Acute experimental liver injury induced by CCl₄ caused drastically decreasing activities of the main liver P450 isoenzymes such as CYP1A2, CYP2C6, CYP2E1 and CYP3A2, as well as their protein expressions. Pretreatment of SLE (500 mg/kg) and DDB (200 mg/kg) twice a day for three days significantly decreased the losses of activities of CYP1A2, CYP2C6, CYP2E1 and CYP3A2. Similar results were observed in protein expressions. In addition, in the CCl₄ induced HepG2 cells injury model and the CYP3A activity level correlated well with ROS level in several ingredients of SLE treated groups, especially in γ-schisandrin group. These results indicated that the reversion of P450 after SLE/DDB treatment were, on one hand, due to hepatoprotective effects of these lignans on livers; on the other hand, due to their regulation of P450 through anti-oxidative effect and γ-schisandrin might be the most powerful ingredient of SLE. Also, there might be potential interactions between SLE or DDB and co-administered medicines and it is necessary to adjust the dosage of co-administrated medicines in clinical medication of liver disease.     

Lycium barbarum polysaccharides protect mice liver from carbon tetrachloride-induced oxidative stress and necroinflammation

Ethnopharmacological relevance

Lycium barbarum has been used as a traditional Chinese medicine to nourish liver, kidneys and the eyes.

Aim of the study

We investigated the protective mechanisms of Wolfberry, Lycium barbarum polysaccharides (LBP) in carbon tetrachloride (CCl₄)-induced acute liver injury.

Materials and methods

Mice were intraperitoneally injected with a 50 μl/kg CCl₄ to induce acute hepatotoxicity (8 h) and were orally fed with LBP 2 h before the CCl₄ injection. There were six experimental groups of mice (n = 7-8 per group), namely: control mice (vehicle only; 1 mg/kg LBP or 10 mg/kg LBP), CCl₄-treated mice and CCl₄ + LBP treated mice (1 mg/kg LBP or 10 mg/kg LBP).

Results

Pre-treatment with LBP effectively reduced the hepatic necrosis and the serum ALT level induced by CCl₄ intoxication. LBP remarkably inhibited cytochrome P450 2E1 expression and restored the expression levels of antioxidant enzymes. It also decreased the level of nitric oxide metabolism and lipid peroxidation induced by CCl₄. LBP attenuated hepatic inflammation via down-regulation of proinflammatory mediators and chemokines. Furthermore, LBP promoted liver regeneration after CCl₄ treatment. The protective effects of LBP against hepatotoxicity were partly through the down-regulation of nuclear factor kappa-B activity.

Conclusion

LBP is effective in reducing necroinflammation and oxidative stress induced by a chemical toxin, thus it has a great potential use as a food supplement in the prevention of hepatic diseases.     

南沙参多糖分散片急性毒性试验及对小鼠试验性肝损伤的保护作用

目的:观察南沙参多糖分散片( RPDTS)小鼠急性毒性反应及其对四氯化碳(CCl4)致小鼠肝损伤的保护作用.方法:通过测定小鼠最大给药量考察RPDTS的急性毒性;RPDTS低、中、高剂量(0.75,1.5,3 g·kg-1)灌胃给药7d后,采用CCl4致小鼠急性肝损伤模型,比色法测定小鼠血清丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、肝组织匀浆总超氧化物歧化酶(T-SOD)、丙二醛(MDA)及谷胱甘肽过氧化物酶(GSH-Px)的含量,观察肝组织病理学改变.结果:小鼠ig RPDTS最大给药量为含生药208 g·kg-1,相当于南沙参临床用量的120倍;RPDTS各剂量组可显著降低急性肝损伤小鼠血清中ALT,AST活性和肝组织中MDA含量(P＜0.05),提高肝组织中T-SOD和GSH-Px活性(P＜0.05);病理形态学观察显示RPDTS能明显减轻肝脏的病理损伤.结论:RPDTS无急性毒性,对CCl4所致小鼠急性肝损伤具有一定的保护作用.     

甘肃产藏药五脉绿绒蒿总黄酮对小鼠实验性肝损伤的保护作用

目的:研究甘肃产藏药五脉绿绒蒿总黄酮对小鼠实验性肝损伤的保护作用。方法:取小鼠55只,按性别体重随机分为5组;各组分别灌胃五脉绿绒蒿总黄酮(0.300,0.150,0.075 g.kg-1)以及对照液20 mL.kg-1;末次给药1 h后,模型对照组及各给药组腹腔注射四氯化碳(CCl4)15 mg.kg-1、扑热息痛(AP)150 mg.kg-1或硫代乙酰胺(TAA)500 mg.kg-1,16 h后采集标本,测定血清丙氨酸转氨酶(ALT)与天冬氨酸转氨酶(AST)、肝组织中丙二醛(MDA)含量以及超氧化物歧化酶(SOD)和谷胱甘肽过氧化物酶(GSH-Px)的活性。结果:0.150～0.300 g.kg-1的甘肃产藏药五脉绿绒蒿总黄酮能降低CCl4,TAA或AP诱发肝损伤小鼠的血清ALT和AST(P<0.01),提高CCl4或TAA诱发肝损伤小鼠肝组织SOD与GSH-Px的活性(P<0.05,P<0.01),降低CCl4或AP诱发肝损伤小鼠肝组织MDA的含量(P<0.01);同时在0.075～0.300 g.kg-1,甘肃产藏药五脉绿绒蒿总黄酮的肝损伤保护作用显示出一定的量-效关系。结论:甘肃产藏药五脉绿绒蒿总黄酮对CCl4,AP,TAA造成的小鼠急性肝损伤具有一定的保护作用。     

榄仁叶氯仿提取物的护肝作用及其对肝脏IL-6表达的抑制作用

目的 :研究榄仁树叶氯仿提取物 (TCCE)对CCl₄诱导的小鼠肝损伤的防护作用及其机制。方法 :以不同剂量TCCE(20,50,10 0mg·kg^-1)给小鼠连续灌胃 5d后 ,腹腔注射CCl₄,24h后测定小鼠血清ALT活力变化。同时 ,运用RT PCR半定量分析肝脏IL 6mRNA量的变化并观察肝组织形态学改变。结果 :小鼠腹腔注射CCl₄24h后 ,sALT水平显著升高 ,为对照组的 5.6倍 (P<0.01)。而各剂量TCCE均可显著抑制CCl₄诱导的小鼠sALT水平的上升 ,其中 ,100mg·kg^-1TCCE组小鼠sALT水平恢复至对照组水平。形态学观察表明 ,TCCE明显减轻CCl₄引起的小鼠肝细胞索排列紊乱、肝细胞肿胀及嗜酸性变等 ,且能对抗甚至逆转CCl₄引起的急性肝损伤小鼠肝脏IL-6mRNA含量的升高。结论 :TCCE具有很好的护肝作用 ,且其机理可能与抑制IL-6基因的过度表达有关。     

桑椹提取物对小鼠急性肝损伤保护作用

目的:研究桑椹提取物对四氯化碳(CCl4)及乙醇致小鼠急性肝损伤的保护作用。方法:分别取昆明种小鼠60只,雌雄各半,随机分为6组,分别为正常组和模型组(ig给予蒸馏水),阳性药(联苯双酯滴丸)组(0.40 g·kg-1),桑椹提取物低、中、高剂量组(1.525,3.050,6.100 g·kg-1),除正常组外分别采用CCl4和乙醇建立小鼠急性肝损伤模型,造模成功后各组连续ig给药7 d。给药后测定小鼠肝脏系数,测定CCl4肝损伤小鼠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,以及酒精性肝损伤小鼠肝组织匀浆中甘油三酯(TG),还原型谷胱甘肽(GSH)和丙二醛(MDA)的含量,苏木素-伊红(HE)染色观察肝组织病理切片。结果:与正常组比较,模型组CCl4肝损伤小鼠血清中ALT,AST活性明显升高(P0.01),酒精性肝损伤小鼠肝组织中MDA和TG含量明显升高,GSH含量明显降低(P0.01),模型组病理学观察肝损伤均较为明显;与模型组比较,桑椹提取物能降低ALT,AST活性,能明显降低MDA和TG含量,明显升高GSH含量,均具有明显的统计学差异(P0.05,P0.01),病理检查结果显示玉热买提取物有明显的保肝作用。结论:桑椹提取物对小鼠四氯化碳、酒精肝损伤有良好的保护作用。     

长片金线兰多糖对四氯化碳诱导急性肝损伤小鼠的保护作用

目的研究长片金线兰多糖的结构特征以及对四氯化碳(CCl_4)致小鼠急性肝损伤的保护作用。方法从长片金线兰中提取多糖,分析其相对分子质量、单糖组成、紫外与红外吸收特征。将48只ICR小鼠随机分为对照组、模型组、联苯双酯(150 mg/kg)组和长片金线兰多糖低、中、高剂量(100、200、400 mg/kg)组,给予相应药物干预9 d后,除对照组外,其余各组ip CCl_4造成急性肝损伤,16 h后检测各组小鼠血清中丙氨酸转氨酶(alanine aminotransferase,ALT)、天冬氨酸转氨酶(aspartate aminotransferase,AST)和乳酸脱氢酶(lactate dehydrogenase,LDH)活性;测定各组大鼠肝脏组织中超氧化物歧化酶(superoxide dismutase,SOD)、过氧化氢酶(catalase,CAT)活性以及谷胱甘肽(glutathione,GSH)和丙二醛(malondialdehyde,MDA)含量;采用苏木素-伊红(HE)染色法观察各组小鼠肝脏组织病理变化。结果长片金线兰多糖的相对分子质量为4.254×10~5,由甘露糖、鼠李糖、半乳糖醛酸、葡萄糖、半乳糖、木糖和阿拉伯糖组成(物质的量比为1∶0.11∶0.19∶11.15∶0.87∶0.36∶0.18),紫外与红外光谱扫描结果推测其可能为一种吡喃型杂多糖。与模型组比较,长片金线兰多糖能够显著降低CCl_4致肝损伤小鼠血清中ALT、AST和LDH活性(P0.05、0.01),提高肝脏组织中SOD、CAT活性和GSH含量(P0.05、0.01),降低MDA含量(P0.01),减轻CCl_4对肝组织的病理损伤。结论长片金线兰多糖对CCl_4致小鼠急性肝损伤具有一定的保护作用,其机制可能与抑制脂质过氧化有关。