大王马先蒿对四氯化碳诱导肝纤维化小鼠的保护作用

目的 探讨大王马先蒿对肝纤维化的保护作用.方法 将昆明小鼠随机分为正常对照组、模型对照组、秋水仙碱(0.1 mg·kg-1)组及大王马先蒿小(200 mg·kg-1)、中(400 mg·kg-1)、大(800 mg·kg-1)剂量组,每组10只;通过腹腔注射四氯化碳(CCl4,1 mL·kg-1)建立肝纤维化模型,并于...     

毛菊苣提取物对四氯化碳诱导大鼠肝纤维化的防治作用

目的 观察毛菊苣提取物抗慢性肝纤维化的作用。方法 将Wistar大鼠随机分为毛菊苣提取物低、中、高剂量（50、100、150 mg/kg）组,秋水仙碱（colchicine,0.5 mg/kg）组,模型组和正常组,ig给药。给药同时各组sc四氯化碳（CCl₄）造模,每周2次。于60 d后,检测大鼠血清丙氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）、总蛋白（TP）、白蛋白（ALB）、肝组织丙二醛（MDA）、谷胱甘肽过氧化物酶（GSH-Px）、羟脯氨酸（Hyp）及肝组织病理变化。结果 与模型组比较,毛菊苣提取物低、中、高剂量组均能明显降低肝纤维化大鼠血清中ALT、AST的含量及肝组织中MDA和Hyp的含量（P＜0.01）,明显提高血清TP、ALB水平（P＜0.05、0.01）及肝组织GSH-Px活性（P＜0.01）;肝脏组织学检查表明,毛菊苣提取物可明显改善肝组织病理损伤程度,其作用呈一定的量效关系。结论 毛菊苣提取物对实验性慢性肝损伤具有保护肝细胞,减少肝损伤,抗肝纤维化作用。     

丹参粉针剂对四氯化碳致大鼠慢性肝纤维化的保护作用

目的:探讨丹参粉针剂对四氯化碳(CCl_4)致大鼠慢性肝纤维化的保护作用。方法:SD大鼠随机分为正常组、模型组、阳性对照组(葡醛内酯注射液26．5 mg·kg~(-1))和丹参粉针剂低、中、高剂量组(100,250, 500 mg·kg~(-1)),除正常组外的其余各组动物先在饮水中加入350 mg·L~(-1)的苯巴比妥诱导2周,然后腹腔注射CCl_4 0．04 mL·kg~(-1)建立慢性肝纤维化模型,每周1次,共注射8周。于注射CCl_4第5周时,各组分别腹腔注射生理氯化钠溶液或相应剂量的药物,在给药2,4,6周后测定血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)活性和前胶原肽(PIIIP)、层黏连蛋白(LN)、透明质酸(HA)的含量。结果:丹参粉针剂低、中、高剂量组和阳性对照组大鼠血清中ALT,AST活性和PIIIP,LN,HA含量均比模型组明显降低(P＜0．01～P＜0．05)。结论:丹参粉针剂对CCl_4致大鼠慢性肝纤维化具有保护作用。     

紫七软肝片对四氯化碳所致慢性肝纤维化大鼠的保肝作用

目的 验证紫七软肝片对四氯化碳(CCl4)所致大鼠慢性肝纤维化模型的保肝作用及抗纤维化作用。方法 模型组及各给药组首次皮下注射40％CCl45ml·kg-1,以后每三天注射一次40％CCl43ml·kg-1,正常对照组给予等体积橄榄油,持续9wk,给药自造模之日开始。结果 CCl4所致慢性肝纤维化大鼠有明显肝损伤及慢性纤维化的表现,紫七软肝片3,6,12g·kg-1三个剂量组肝功能指标均有不同程度的改善;肝组织胶原蛋白含量较模型组均明显降低;HA的值较模型组显著降低;病理组织学检查结果表明其肝脏病变程度均较模型组明显减轻。结论 紫七软肝片三个剂量组对慢性肝纤维化大鼠具有肝保护作用及抗肝纤维化作用。     

矮地茶水煎液对四氯化碳致大鼠肝纤维化的保肝作用

摘 要 目的：探讨矮地茶水煎液对四氯化碳（CCl₄）所致肝纤维化的保护作用。方法: 将50只大鼠随机分为5组,即正常组、模型组、联苯双脂组（阳性对照组,200 mg·kg^-1）、矮地茶水煎液高(36 g·kg^-1,以生药材计)、低(18 g·kg^-1,以生药材计)剂量组,每组10只。除正常组外,其余各组用CCl₄诱导肝纤维化模型,造模成功后,每天灌胃给药,连续30 d。测定血清中丙氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）、血清透明质酸（HA）、肿瘤坏死因子（TNF-α）、层黏蛋白（LN）、Ⅲ型前胶原（PCⅢ）水平及肝组织中羟脯氨酸（Hyp）、超氧化物歧化酶（SOD）、谷胱甘肽过氧化物酶（GSH-Px）、丙二醛（MDA）的含量。结果: 与模型组比较,矮地茶水煎液高、低剂量组能显著降低血清指标ALT、AST、HA、LN、PCⅢ的水平（P<0.05）,降低Hyp、MDA含量（P<0.05）,明显升高SOD、GSH Px含量（P<0.05）。结论:矮地茶水煎液有明显的保肝、抗肝纤维化作用,其作用机制可能与下调HA和TNF-α的表达、保护肝细胞、减轻肝脏炎症和抗脂质过氧化损伤有关。     

玉郎伞皂苷对四氯化碳诱导大鼠肝纤维化的影响

目的研究玉郎伞皂苷(YLSS)对四氯化碳(carbontetrachloride,CCl4)所致大鼠肝纤维化的药理作用,并探讨其作用机制。方法将SD大鼠随机分成模型组及空白对照组(NC),模型组大鼠以50%CCl4食用油溶液为诱导剂灌胃造模,NC组灌胃给予食用油。将病理检查确认形成肝纤维化的SD大鼠,随机分成模型对照组(MC)和药物干预组。药物干预组分为4小组,分别灌胃给予YLSS(20、40和80mg.kg-1)及秋水仙碱片(0.20 mg.kg-1),模型组给予等剂量NS,连续给药4周。末次给药24 h后处死大鼠,采集血清及肝组织,检测大鼠血清中AST、ALT活性,测定肝组织中SOD、MDA、GSH和GSH-Px的含量,并观察肝组织病理学改变。结果各剂量YLSS和阳性药能降低大鼠血清中CCl4所致异常升高的AST、ALT水平(P<0.01),提高肝组织SOD、GSH含量(P<0.01),并降低异常升高的MDA含量(P<0.05或P<0.01);各剂量YLSS能升高大鼠肝组织GSH-Px(P<0.01);中、高剂量YLSS及阳性药能够减轻肝细胞损伤程度(P<0.01)。结论玉郎伞皂苷对CCl4诱导的大鼠肝纤维化具有一定的抑制作用,其机制可能与其清除自由基、抑制脂质过氧化有关。     

四氯化碳致大鼠肝纤维化及红苓肝宝的防治作用

目的：研究红苓肝宝对大鼠肝纤维化的防治作用，方法：运用皮下多次注射四氯化碳致大鼠慢性损伤性肝纤维化模型，观察红苓肝宝对大鼠肝组织病理变化。血清透明质酸，血清丙氨酸氨基转移酶（ALT／GPT），天冬氨酸氨基转氨酶（AST／GOT），总蛋白（TP）和白蛋白（Alb)以及内脏器官重量的影响，并与秋水仙碱进行了比较。结果：红苓肝宝在该剂量下大鼠肝纤维化率为45％，而模型组与秋水仙碱肝纤维化率分别为100％和50％，对肝损伤的其他指标观察表明，红苓肝宝对肝损伤的其他指标均有降低作用，与模型组比较，P＜0．01，结论：红苓肝宝在该剂量下对大鼠有明显的抗肝纤维化作用。     

黄芪总苷对四氯化碳所致大鼠肝纤维化的防治作用

目的 观察黄芪总苷(Astragalosides,AST)对四氯化碳(Carbon Tetrachloride,CCL4)所致大鼠肝纤维化的防治作用。方法 CCL4皮下注射制备大鼠肝纤维化模型,造模4周后,灌胃给药AST 20,40,80 mg·kg-1·d-1,连续用药9周后测定肝纤维化大鼠的肝、脾指数,血清GPT和GOT,肝组织中羟脯氨酸(HYP)含量,并对肝组织进行病理组织学观察。结果 AST高、中、低3种剂量均可明显降低CCL4升高的血清GPT和GOT水平,使CCL4升高的大鼠肝组织中HYP含量恢复,高剂量还可明显降低肝、脾指数,AST的中、高剂量组均可明显减轻肝组织纤维化和肝硬化的病理组织学变化。结论 AST有明显的抗CCL4性肝纤维化作用,其中AST高剂量组的疗效最为显著。     

人参总皂苷对四氯化碳诱导的大鼠肝纤维的保护作用

目的 观察人参总皂苷(缓控 of panax ginseng,SPG)对四氯化碳所诱导的肝纤维化大鼠的保护作用.方法 将大鼠随机分为正常组、模型组、人参总皂苷40、80、160 mg·kg-1组,阳性药秋水仙碱0.1 mg·kg-1组.除正常组外,其余各组采用四氯化碳诱导肝纤维化模型.于造模第7周起,给药组分别灌胃给予...     

四氯化碳致大鼠肝纤维化模型血液流变学性质的研究

目的：研究大鼠肝纤维化时血液流变学性质的变化特征。方法：以四氯化碳诱导大鼠肝纤维化模型,检测血液粘度、血浆粘度、红细胞压积、红细胞特性指数等血液流变学参数,分析其变化特征。结果：与正常组比较,模型组大鼠全血粘度、全血还原粘度、红细胞压积、红细胞聚集 数及红细胞刚性指数明显增高。结论：大鼠肝纤维化时血液粘增大,红细胞流变性能减弱,易引发微循环障碍,加重肝纤维化的发展。     

软肝片抗肝纤维化作用的实验研究

目的探讨软肝片对四氯化碳中毒性肝纤维化的防治作用。方法用四氯化碳皮下注射造成大鼠肝纤维化模型 ,以联苯双酯作为阳性对照 ,测定血清丙氨酸氨基转移酶 (ALT)、天冬氨酸氨基转移酶 (AST)、玻璃酸(HA)、唾液酸及肝组织羟脯氨酸 (Hyp)、丙二醛 (MDA)、超氧化物歧化酶 (SOD)含量 ,以反映肝细胞损伤及肝纤维化程度。结果软肝片可明显降低肝纤维化大鼠血清ALT、AST、HA、唾液酸水平及肝组织Hyp和MDA水平 ,提高肝组织中SOD活力。结论软肝片具有一定的抗肝纤维化及抗脂质过氧化作用。     

Protective effects of NYG-1 on CCl_4-induced acute liver injury in rats

OBJECTIVE To study the protection effects and mechanisms of NYG-1 on CCl4-induced acute liver injury.METHODS Acute liver injury model of rats was established by using CCl4.48 male SPF SD rats were weighed and randomly divided into six groups with 8 in each group,normal group,model group,positive control group(silibinin),low-,medium-and high-dose NYG-1 group.Silibinin was given orally to rats in the positive control group,NYG-1(high-,medium-and low-dose)was given orally in the high-,medium-and low-dose NYG-1group,respectively.Those rats were administered appropriately according to the group once daily for seven consecutive days.On the seventh day,rats were treated with 10% CCl4(10mL·kg-1 of0.1% CCl4 solution in olive oil)intraperitoneally injecting(ip)to induce acute liver injury,except the normal group.At 16 h after CCl4 treatment,rats were weighed,then anaesthed with ether,the blood and liver were collected.Serum ALT,AST,LDH and ALP were measured.MDA content and SOD activity in liver homogenate were detected.The histopathological changes of liver were observed by H&E staining.RESULTS Acute liver injury model was established successfully in rats by intraperitoneally injecting CCl4.Pretreatment with medium and high dose NYG-1 decreased the increase of ALT,AST and MDA induced by CCl4,but it had no influence on serum LDH,ALP level and SOD activity in the liver homogenate.CONCLUSION The obtained results suggest that oral administration of NYG-1 hasve the protective effects against CCl4-induced acute hepatic injury in rats,Its mechanism may be related to antioxidant-like action.     

楤木皂苷抗四氯化碳致大鼠肝纤维化作用

目的观察楤木皂苷对四氯化碳致大鼠肝纤维化的保护作用。方法采用质量分数为40%的四氯化碳皮下注射诱导大鼠肝纤维化模型,MASSON染色观察肝组织病理学改变,采集血清检测肝功能及透明质酸(hyaluronic acid,HA)、层黏连蛋白(laminin,LN)、三型胶原蛋白(typesⅢ-collagen,COI-Ⅲ)含量的变化。结果楤木皂苷可抑制肝假小叶的形成和胶原纤维沉积,改善肝功能,降低血清中HA、LN、COI-Ⅲ的含量(P<0.05)。结论楤木皂苷有显著的抗肝纤维化的作用。     

奥曲肽对肝纤维化大鼠自噬相关蛋白LC3和Beclin-1表达的影响

<正>肝纤维化(hepatic fibrosis, HF)是肝脏对慢性肝损伤因素(如酒精性肝炎、非酒精性脂肪性肝炎、病毒性肝炎等)创伤修复应答的结果,以胞外基质合成与分解平衡紊乱为特征。肝星状细胞(hepatic stellate cells, HSCs)在HF进展中起到重要作用。当肝脏受到急性或慢性损伤时,静止的HSC变成活化状态,转变为成纤维细胞,活化的HSC是细胞外基质的主要来源[1]。自噬是在胞内将受损的细胞器降解,为细胞生存提供     

Fucoidan partly prevents CCl4-induced liver fibrosis

Fucoidan, a sulfated polysaccharide extracted from brown algae, has a wide range of biological activities, including anti-inflammatory, anti-viral, and anti-tumor activities. In the present study, we investigated the effects of fucoidan on CCl₄-induced liver fibrosis. Administration of fucoidan reduced CCl₄-induced acute and chronic liver failure. Hepatic fibrosis induced by CCl₄ was also attenuated by injection of fucoidan. Damage to hepatocytes and activation of hepatic stellate cells are key events in liver fibrosis, and, interestingly, treatment of hepatocytes with fucoidan prevented CCl₄-induced cell death and inhibited the proliferation hepatic stellate cells. These results indicate that fucoidan might be a promising anti-fibrotic agent possessing dual functions, namely, protection of hepatocytes and inhibition of hepatic stellate cell proliferation.     

扛板归对CCl_4致大鼠肝损伤的保护作用研究

目的:研究扛板归醇提物对CCl4致大鼠肝损伤的保护作用。方法:复制CCl4致大鼠化学性肝损伤模型,测定血清中丙氨酸氨基转移酶(ALT)、天冬氨酸氨基转移酶(AST)、超氧化物歧化酶(SOD)活性及丙二醛(MDA)的含量。结果:扛板归能不同程度降低肝损伤大鼠血清中ALT、AST活性,升高SOD活性,降低MDA含量;并能减轻肝组织变形、坏死等病理改变。结论:扛板归具有一定的保肝作用,其机制可能与抗脂质过氧化作用有关。     

The protective effects of Hibiscus sabdariffa extract on CCl4-induced liver fibrosis in rats.

Dried flower Hibiscus sabdariffa L. (HSE) extracts, a local soft drink material and medicinal herb, were studied for their protective effects against liver fibrosis induced using carbon tetrachloride (CCl(4)) in rats. Male Wistar rats were administered CCl(4) by intraperitoneal injection for 7weeks and received a normal diet or normal diet with various HSE doses (1-5%) for 9weeks. HSE significantly reduced the liver damage including steatosis and fibrosis in a dose dependent manner. Moreover, HSE significantly decreased the elevation in plasma aspartate aminotransferase (AST) and alanine aminotransferase (ALT). It also restored the decrease in glutathione content and inhibited the formation of lipid peroxidative products during CCl(4) treatment. In the primary culture, HSE also significantly inhibited the activation of the hepatic stellate cells. These results suggested that HSE may protect the liver against CCl(4)-induced fibrosis. This protective effect appears due to HSEs antioxidant properties.     

七叶皂苷钠通过抑制4EBP1的磷酸化进而减缓CCl4诱导的大鼠肝纤维化

目的研究七叶皂苷钠(Sodium Aescinate,SA)对四氯化碳诱导的大鼠肝纤维化的抑制作用。方法41只健康♂SD大鼠随机分为正常对照组(n=5)、模型组(n=18)以及七叶皂苷钠治疗组(n=18)。在8周实验结束后取大鼠肝脏组织,HE染色观察肝脏组织的形态结构,Masson染色观察胶原纤维增生,免疫组化检测相关蛋白的表达;MTT法测定大鼠肝星状细胞HSC-T6细胞增殖,流式细胞仪检测细胞凋亡,Western blot法检测细胞蛋白的表达。结果七叶皂苷钠可以抑制四氯化碳诱导的大鼠肝纤维化形成,抑制肝星状细胞的增殖,并能促进其凋亡,且能抑制p-4EBP1、I型胶原及Ⅲ型胶原的表达。结论七叶皂苷钠通过抑制4EBP1磷酸化进而抑制肝脏纤维化的进程。     

祁门红茶多酚提取物对CCl_4诱导的小鼠肝损伤保护作用的研究

目的研究祁门红茶多酚对CCl4诱导的小鼠肝损伤的保护作用。方法采用CCl4诱导建立小鼠肝损伤模型,测定小鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)活性,检测肝组织中丙二醛(MDA)含量、谷胱甘肽(GSH-Px)和超氧化岐化酶(SOD)水平,并对肝组织进行HE染色分析。结果与模型组相比较,祁门红茶多酚均能显著降低ALT、AST、ALP活性和MDA含量,提高GSH-Px和SOD水平(P<0.05),且呈剂量依赖关系。肝组织病理切片显示:提前给予不同剂量的祁门红茶多酚,使肝脏均受到一定程度的保护。结论祁门红茶多酚对CCl4诱导的小鼠肝损伤具有保护作用。     

Methyl palmitate prevents CCl(4)-induced liver fibrosis

Liver fibrosis is characterized by an excess of collagen fiber deposition, and it is known that Kupffer cells play an important role by immunomodulation of the toxic response. Methyl palmitate (MP) is an effective Kupffer cell inhibitor. The aim of this work was to evaluate the effect of MP on experimental liver fibrosis. Four groups were formed: the control group, which received the vehicles only; CCl(4) group (0.4 g kg(-1), i.p., three times a week, for eight weeks); CCl(4) plus MP (300 mg kg(-1), i.p., daily); and MP alone. Alanine aminotransferase was increased by CCl(4), and MP did not prevent this increase. Lipid peroxidation was increased markedly by CCl(4); again, MP was not able to prevent this effect. Fibrosis increased nearly 6-fold (measured as liver hydroxyproline content) in the CCl(4) group; MP preserved the normal content of collagen. These results were corroborated by histopathology. To elucidate the antifibrogenic mechanism of MP, we measured the production of TGF-beta; CCl(4) increased this cytokine several-fold, and MP abolished this increase. Collectively the present results indicate that MP possesses a strong antifibrogenic effect at least in the CCl(4) model of fibrosis. The antifibrotic effect of MP is probably associated with its ability to reduce TGF-beta content, maybe by immunomodulation of Kupffer cells functioning.