谷氨酰胺对非酒精性脂肪肝炎大鼠肠黏膜屏障的保护作用

目的 探讨谷氨酰胺对非酒精性脂肪肝炎肠黏膜屏障功能的保护作用.方法 32只SD大鼠随机分为正常对照组8只,给予普通饮食喂养;高脂饮食组24只,给予高脂饲料喂养,于8周末从高脂饮食组随机抽取8只大鼠处死作为单纯性脂肪肝组,剩余大鼠随机分为谷氨酰胺组、NASH组,谷氨酰胺治疗组在8周末加用谷氨酰胺灌胃.12周末处死所有大鼠,测定大鼠门静脉血浆中内毒素、腹主动脉血浆中D-木糖以及肠粘液中sXgA的水平,测定小肠组织匀浆中SOD的活性和MDA的含量,并测定大鼠血清中TC、TC、ALT、AST,HE染色观察肝脏病理改变.结果 12周模型组大鼠血清ALT、AST明显升高,肝脏病理表现为脂肪性肝炎,谷氨酰胺治疗组大鼠血清ALT、AST明显下降(P＜0.05),肝组织炎症活动计分也明显下降(3.25±1.49 vs.4.38±1.06,P＜0.05),但仍显著高于8周单纯性脂肪肝组大鼠水平(3.25±1.49 vs.2.00±0.76,P＜0.05).谷氨酰胺治疗组肝细胞脂肪变性程度无显著变化.谷氨酰胺治疗组大鼠门静脉血浆中内毒素、腹主动脉血浆中D-木糖、小肠组织匀浆中MDA含量与模型组相比明显降低(P＜0.05).肠黏液中slgA的水平和小肠组织匀浆中SOD与模型组相比明显升高(P＜0.05).结论 谷氨酰胺可以降低高脂饮食诱发的非酒精性脂肪性肝炎大鼠血清中转氨酶水平和肝组织炎症损伤,降低门静脉血中内毒素水平,但不能完全阻止炎症的进展,提示肠黏膜屏障功能的改变是非酒精性脂肪性肝炎发病的重要机制之一.     

甘氨酸对NASH大鼠肝组织环氧合酶-2表达的影响

目的 探讨环氧合酶-2在非酒精性脂肪性肝炎发病机制中的作用以及甘氨酸对其表达的影响。方法 选择雄性Wistar大鼠54只,随机分为对照组、高脂饮食组和甘氨酸干预组,比较实验第8、12和16周末动物血浆ALT和内毒素水平及肝组织COX-2的表达情况。结果 在实验第12周和16周末,脂肪肝组动物血浆ALT较对照组明显增高（P〈0．05）,各期脂肪肝组和甘氨酸组动物腹主动脉血内毒素水平与对照组比较均无差异,而门静脉血内毒素水平明显上升,腹主动脉血与相对应的门静脉血内毒素比较有显著性差异（P〈0．01）;在第16周脂肪肝组和甘氨酸组COX-2表达呈阳性,甘氨酸处理组积分光密度值比脂肪肝组明显降低（P〈0．05）;在对照组、实验第8周和12周脂肪肝组肝内无COX-2 mRNA表达,但在第16周脂肪肝组动物肝内COX-2的相对表达量为0．67±0．04,甘氨酸组为0．43±0．04,两者比较有显著性差异（P〈0．05）;血浆内毒素水平与COX-2表达呈正相关（r=0．58,P〈0．01）。结论肠源性内毒素血症上调肝组织COX-2表达,后者在NASH发病机制中起着重要的作用,甘氨酸能降低内毒素水平,并使NASH大鼠肝内COX-2表达减少。     

甘氨酸对非酒精性脂肪性肝炎肠组织巨噬细胞移动抑制因子表达的影响

目的:研究探讨甘氨酸对非酒精性脂肪性肝炎大鼠肠组织巨噬细胞移动抑制因子(MIF)表达的影响。方法:将36只雄性SD大鼠,常规饲养1周后,随机分为3组:正常对照组大鼠(采用普通饲料喂养+生理盐水腹腔注射);模型组大鼠(采用高脂饮食+腹腔注射氧四环素);治疗组大鼠(采用高脂饮食+腹腔注射氧四环素+5%甘氨酸),造模4周、8周后分批处死。取肝脏标本做HE染色、观察肝脏形态学变化;检测血浆肿瘤坏死因子-α(TNF-α)、转氨酶(ALT、AST)、白细胞介素-6(IL-6)、白细胞介素-10(IL-10)和门静脉血浆内毒素(ET)水平;取肠组织做HE染色,并用免疫组化的方法检测肠组织中MIF表达水平。结果:4周、8周时模型组大鼠门静脉ET水平、血浆TNF-α、AST、ALT、IL-6、IL-10均与对照组大鼠比较,差异有显著性意义(P0.05),治疗组大鼠与同期模型组相比较差异有显著性意义(P0.05);4周、8周时模型组大鼠肠组织MIF的表达水平较同期对照组大鼠有明显增多(P0.05),治疗组大鼠肠组织MIF的表达水平与同期模型组相比较,差异有显著性意义(P0.05)。结论:①采用高脂饮食结合氧四环素腹腔注射制备的大鼠非酒精性脂肪性肝炎(NASH)模型伴有肠源性内毒素血症(IETM)的形成。②在NASH发生发展过程中肠组织MIF表达逐渐增高,可能与肠免疫屏障受损有关;③甘氨酸可拮抗内毒素,下调肠组织MIF的表达水平。     

髓系细胞触发受体-1在非酒精性脂肪性肝炎中的作用

目的：研究探讨肝脏髓系细胞触发受体-1（triggering receptor expressed on myeloid cells-1,TREM-1）在非酒精性脂肪性肝炎发生发展中的作用。方法：雄性SD大鼠24只,自由饮食,自然光照,环境温度17～23℃,适应性饲养1周后随机分成两组：对照组（普通饲料喂养＋腹腔注射生理盐水）,模型组（高脂饮食＋腹腔注射氧四环素）,造模4周、8周时分批处死,按照实验要求采集腹主动脉血并检测血浆中的肿瘤坏死因子-α（TNF-α）、谷氨酸氨基转移酶（ALT）、天冬氨酸氨基转移酶（AST）、白细胞介素-6（IL-6）、白细胞介素-10（IL-10）和门静脉血浆内毒素（ET）水平;取肝标本做HE染色,并用ELISA方法检测肝脏TREM-1的表达量。结果：与同期对照组相比,4周时模型组TNF-α、ALT、AST、ET明显升高（P〈0.05）;与对照组比较8周时模型组大鼠IL-6明显升高（P〈0.05）;4周起模型组大鼠IL-10开始降低（P〈0.05）;ELISA结果显示4周、8周模型组TREM-1的表达量与同期对照组相比差异均有显著性意义（P〈0.05）;直线相关分析结果：TREM-1与TNF-α、ET、IL-6均呈正相关,与IL-10呈负相关（P〈0.01）。结论：TREM-1通过与肠源性内毒素血症（IETM）的相互作用在非酒精性脂肪性肝炎的发生与发展中起有重要作用。     

荔枝核提取物对非酒精性脂肪性肝炎大鼠肝功能的保护作用

目的观察荔枝核提取物对实验性非酒精性脂肪性肝炎（NASH）大鼠肝功能的保护作用。方法 35只Wistar大鼠被随机分为对照组（5只）、模型组（10只）、小剂量（10只）和大剂量荔枝核提取物干预组（10只）。分别以250mg.kg-1和500mg.kg-1荔枝核提取物干预NASH大鼠6周。结果与对照组比,模型组大鼠血清GLU、ALT、AST、TG、TC和LDL水平均显著升高（P〈0.05）;与模型组比,小剂量荔枝核提取物干预组大鼠血清GLU、ALT、TG和LDL显著降低（P〈0.05）,而大剂量干预组动物效果更为明显。结论荔枝核提取物能改善NASH大鼠葡萄糖、脂质代谢和肝功能,具有较好的疗效。     

非酒精性脂肪性肝炎大鼠小肠黏膜结构变化的研究

目的:探讨非酒精性脂肪性肝炎形成阶段肠黏膜屏障的损伤情况.方法:24只雄性Wistar大鼠随机分为对照组(普通饮食)和模型组(高脂饮食),各组12只.8周、12周处死大鼠后称量体重、肝重,并计算肝指数,检测血清甘油三酯(TG)、丙氨酸氨基转移酶(ALT)、肿瘤坏死因子(TNF-α)水平及门静脉、腹主动脉血中内毒素(ET)水平;取小肠组织经透射电镜观察其超微结构的改变;取肝标本做HE染色,观察其病理变化.结果:8周、12周模型组大鼠肝指数与同期对照组相比差异有显著性意义(P＜0.01);8周模型组大鼠TG、ALT与同期对照组比较呈升高趋势,12周差异有统计学意义(P＜0.05);8周、12周模型组大鼠血清TNF-α水平与同期对照组比较明显升高(P＜0.05);8周、12周模型组大鼠门静脉ET水平较对照组明显上升(P＜0.05);腹主动脉血ET与同期门静脉ET比较,差异有显著性意义(P＜0.05);8周、12周观察模型组大鼠小肠组织病理学变化,发现肠上皮细胞变性、坏死、脱落,并有炎细胞浸润;透射电镜显示肠上皮连接增宽,绒毛稀疏、缺如,固有层水肿.结论:非酒精性脂肪性肝炎发生时伴有肠源性内毒素血症(IETM)的形成,IETM可促使炎症因子TNF-α释放增加,加重肝脏损害,IETM的形成与肠黏膜屏障受损有关.     

枳黄方对急性酒精性肝病大鼠TNF-α和内毒素的影响

目的：通过观察枳黄方对大鼠急性酒精性肝损伤肝组织TNF—α的变化及其血浆内毒素水平的改变，验证此方对大鼠急性酒精性肝病的防治作用。方法：将75只Wistar大鼠随机分为枳黄方组、模型组及正常组，采用免疫组化法测量肝组织内TNF—α值，用生化法检测血浆内毒素水平。结果：枳黄方组大鼠血浆内毒素水平高于正常组（P〈0．05），但显著低于模型组（P〈0．01），肝组织TNF-α和血清ALT水平高于正常组（P〈0．01），但显著低于模型组（P〈0.01）。并且血浆内毒素水平与肝组织TNF—α活性变化呈正相关（r=0．993，P〈0．01）。结论：枳黄方合剂可显著降低急性酒精性肝病大鼠血液中内毒素水平及肝脏中TNF-α水平，对大鼠急性酒精性肝病有较好治疗作用。     

异甘草酸镁治疗大鼠非酒精性脂肪性肝炎及其作用机制

目的探讨异甘草酸镁对非酒精性脂肪性肝炎（NASH）的治疗作用及其作用机制。方法雄性SD大鼠50只随机分为5组：正常组（N组）普通饲料喂养;模型Ⅰ组（M1组）和模型Ⅱ组（M2组）高脂饲料喂养;异甘草酸镁治疗组（T1组）和饮食治疗组（T2组）在喂饲高脂饲料12周后改为普通饲料喂养,其中T2组同时给予异甘草酸镁120 mg.kg-1.d-1尾静脉注射。12周末处死N和M1组大鼠;16周末处死M2、T1和T2组大鼠。观察各组大鼠肝脏组织病理学改变,并测定各组大鼠肝功能（血清AST、ALT）、脂代谢（血清TC、TG、HDL、LDL-C）及脂质过氧化（肝匀浆MDA、SOD、GSH）指标。结果 12周末M1组大鼠出现NASH,肝脏的脂肪变性程度和炎症活动度均显著增高,TC、TG、LDL-C、MDA明显升高,HDL、SOD和GSH明显降低（P〈0.05）;16周末,M2组大鼠NASH程度进一步加重,并出现AST和ALT的明显升高（P〈0.05）。和M1、M2组相比,T1组脂肪变性和炎症活动程度明显减轻,肝功能、脂代谢和脂质过氧化各项指标均改善（P〈0.05）;而T2组差异无统计学意义（P〉0.05）。结论异甘草酸镁可能通过抗脂质过氧化、调节血脂代谢、抑制炎症反应等作用减轻NASH大鼠肝脂肪变性和炎症,对NASH有治疗作用。     

荔枝核提取物对非酒精性脂肪性肝炎大鼠肝组织巨噬细胞移动抑制因子表达的影响

目的：观察荔枝核提取物对实验性非酒精性脂肪性肝炎（NASH）大鼠的防护作用,以及对肝组织巨噬细胞移动抑制因子（MIF）表达的影响。方法：35只Wistar大鼠随机分为对照组（5只）、模型组（10只）、低剂量（10只）和高剂量荔枝核提取物组（10只）。除对照组外,其余各组均以脂肪乳剂（添加脂肪肝诱导药物丙基硫氧嘧啶）灌胃,另外低、高剂量荔枝核提取物组大鼠以荔枝核提取物溶液（250mg/kg、500mg/kg）灌胃。第6周末处死全部大鼠,进行肝脏组织学和免疫组化检测,对MIF的表达进行评分,并测定血清Glucose、ALT、AST、TG、TC、HDL和LDL水平。结果：与模型组大鼠相比,荔枝核提取物组大鼠可见肝脏脂肪变性、炎症和坏死改善,肝组织MIF表达及血清Glucose、ALT、TG和LDL水平显著降低（P〈0.01、P〈0.05）,血清HDL水平增高（P〈0.05）,且高剂量组Glucose、ALT、TG和LDL的降低显著优于低剂量组（P〈0.05）。结论：荔枝核提取物可改善NASH大鼠肝脏脂肪变性、炎症、坏死和血糖、血脂代谢以及肝功能损害,并能降低肝脏MIF的表达。     

肾气丸对非酒精性脂肪性肝炎大鼠肝细胞脂性凋亡的影响

[目的]探讨肾气丸对高脂饮食诱导的非酒精性脂肪性肝炎（NASH）大鼠肝细胞脂性凋亡的影响。[方法]采用高脂饲料连续喂养12周建立大鼠NASH模型,40只大鼠随机分为4组,正常组予以标准饲料喂养,其余3组进行高脂饮食造模,除模型组外,其他2组分别以肾气丸、二甲双胍进行干预12周。全自动生化仪检测血脂及血清酶学,ELISA法检测血清游离脂肪酸（FFA）水平;苏木精-伊红染色光镜下观察肝组织病理学变化,计算非酒精性脂肪性肝病（NAFLD）炎症活动度积分（NAS）;TUNEL法检测肝细胞凋亡水平,计算凋亡指数（AI）。[结果]NASH模型组大鼠血清丙氨酸氨基转移酶（ALT）、天冬氨酸转氨酶（AST）、总胆固醇（TC）、低密度脂蛋白胆固醇（LDL-C）、FFA水平均较正常组明显增高（P〈0.05,〈0.01）,血清三酰甘油（TG）水平较正常组明显降低（P〈0.05）,肝组织NAS、AI明显高于正常组（P〈0.01）。应用肾气丸和二甲双胍干预后,血清ALT、AST、TC、LDL-C、FFA水平均较模型组明显降低（P〈0.05）,血中TG、高密度脂蛋白胆固醇（HDL-C）与模型组比较差异无统计学意义（P〉0.05）。肝组织NAS和AI较模型组显著降低。相关性分析发现,大鼠肝细胞的AI与肝组织NAS及血清FFA水平呈明显正相关（均P〈0.01）。[结论]NASH大鼠存在着脂质代谢紊乱和肝细胞的脂性凋亡。肾气丸与二甲双胍作用相似,可能是通过调节脂质代谢,影响FFA,阻断其引发的促肝细胞脂性凋亡的级联启动,从而有效地防治NASH的进展。     

Change of intestinal mucosa barrier function in the progress of non-alcoholic steatohepatitis in rats

AIM： To explore the change of intestinal mucosa barrier function in the progress of non-alcoholic steatohepatitis （NASH） in rats. METHODS： Thirty-two Sprague-Dawley （SD） rats were randomly divided into control group and model group. Rats in the control group were given normal diet, and rats in the model group were given fat-rich diet. Eight rats in each group were killed at end of the 8th and 12th wk, respectively. The levels of endotoxin, D-xylose, TG, TC, ALT and AST, intestinal tissue SOD and MDA as well as intestinal mucus secretory IgA （sIgA） were measured. The pathology of liver was observed by HE staining. RESULTS： At end of the 8th wk, there was no marked difference in the levels of endotoxin, D-xylose and sIgA between the two groups. At end of the 12th wk, rats in the model group developed steatohepatitis and had a higher serum level of endotoxin （P = 0.01） and D-xylose （P = 0.00） and a lower serum level of sIgA （P = 0.007）. CONCLUSION： Intestinal mucosa barrier malfunction may exist in NASH rats and may be an important promoter of NASH in rats.     

祛湿化瘀方对高脂饮食诱导的小鼠非酒精性脂肪性肝炎的防治作用

目的：观察祛湿化瘀方治疗非酒精性脂肪性肝炎（NASH）的药效。方法：12周龄C57BL／6J雄性小鼠32只．SPF级。随机分为对照饮食组（n=16）和高脂饮食组（n：16）,对照饮食组小鼠给予10％热能来源于脂肪的对照饲料,高脂饮食组小鼠给予60％热能来源于脂肪的高脂饲料。12周末,对照饮食组和高脂饮食组再分,51j随机分为正常组（N,n=8）、正常给祛湿化瘀方组（NQ,n=8）、模型组（M,n=8）、模型给祛湿化瘀方组（Q,n=8）,分别以lml／100g鼠重灌胃给予祛湿化瘀方（生药含量0．93g／m1）和灭菌饮用水,16周末取材,观察各组小鼠体重、肝组织TG、血清ALT、肝组织HE染色、油红O染色等指标的变化。结果：模型组小鼠体重明显增加,肝组织甘油三酯（TG）含量、血清丙氨酸转氨酶（ALT）明显升高,肝脏HE染色见肝细胞明显的肿胀、脂肪变性和炎细胞浸润．油红O染色见肝脏显著脂滴沉着。肝脏脂肪变积分、炎症积分、气球样变积分均显著升高,并达脂肪性肝炎诊断标准。祛湿化瘀方组小鼠肝组织TG、血清ALT较模型组显著下降,同时肝脏病理组织变化改善,病理积分较模型组显著降低。结论：祛湿化瘀方能够有效防治高脂饮食诱导的C57BL／6J小鼠NASH。     

Marked elevation of serum mitochondrion-derived markers in mild models of non-alcoholic steatohepatitis in rats

Background and Aim:  In order to find sensitive serum markers in non-alcoholic steatohepatitis, liver-specific injury markers were thoroughly examined in mild models of NASH in rats.
Methods:  Wistar and Sprague–Dawley rats were fed a choline-deficient diet for 4 weeks, and serum activities of liver-specific enzyme markers were examined. In the drug-induced steatohepatitis model, tetracycline (0.4 mmol/kg) was given i.p. to rats and the course of hepatotoxicity was evaluated with serum markers, together with the accumulation of total lipid and thiobarbituric acid-reactive substances in the liver.
Results:  In Wistar rats, serum activities of most enzymes tested were significantly increased. In Sprague–Dawley rats, in contrast, the serum level of ornithine carbamyltransferase and glutamate dehydrogenase were markedly elevated in the choline-deficient diet group compared with the control diet groups, whereas other markers were not significantly increased. In the tetracycline-induced steatohepatitis model, the extent of the increase was much higher in mitochondrial markers and the peak of the increase in these markers corresponded with the increase of hepatic total lipid and thiobarbituric acid-reactive substance.
Conclusions:  These observations show that serum mitochondrial enzyme markers are potent markers for non-alcoholic steatohepatitis in rats and are possibly applicable to humans.     

Effect of lactulose on establishment of a rat non-alcoholic steatohepatitis model

AIM: To explore the relationship between changes of intestinal environment and pathogenesis of non-alcoholic steatohepatitis (NASH). METHODS: Forty-two Sprague-Dawley rats were randomly divided into model group (n = 24), treatment group (n = 12), and control group (n = 6). The rats of model and treatment groups were given high-fat diet, and those of the control group were given normal diet. Furthermore, the rats of treatment group were given lactulose after 8 wk of high-fat diet. Twelve rats of the model group were killed at 8 wk of high-fat diet. At the 16 wk the rats of treatment group, control group, and the rest of the model group were killed. The serum levels of aminotransferase were measured and the histology of livers was observed by H&E staining. RESULTS: The livers of rats presented the pathological features of steatohepatitis with higher serum levels of alanine aminotransferase (ALT) and aspartate aminotransferase (AST) in the model group after 16 wk. Compared to the model group, the serum levels of ALT and AST in treatment group decreased significantly and were close to the normal group, and the hepatic inflammation scores also decreased markedly than those in the model group after 16 wk (5.83±2.02 vs3.63±0.64, P<0.05), but were still higher than those in the model group after 8 wk (3.63±0.64 vs 1.98±0.90, P<0.05). However, the degree of hepatic steatosis had no changes in treatment group compared to the model group after 16 wk. CONCLUSION: Lactulose could ameliorate the hepatic inflammation of rats with steatohepatitis induced by fat-rich diet, but could not completely prevent the development of steatohepatitis. It is suggested that intestinal environmental changes such as intestinal bacteria overgrowth, are one of the important factors in the pathogenesis of NASH.     

水飞蓟素对非酒精性脂肪性肝炎大鼠小肠组织抗氧化作用的实验研究

目的探讨水飞蓟素对NASH大鼠小肠组织氧化应激损伤的影响。方法 50只Wistar大鼠被随机分为对照组、模型组和水飞蓟素干预组;对照组（10只）用普通饲料喂养,模型组（20只）通过高脂饮食建立NASH模型,水飞蓟素组（20只）给予高脂饮食加水飞蓟素灌胃,12周后评估。结果模型组较正常对照组大鼠血清TG、TC、ALT、AST水平明显升高（P〈0.01）,水飞蓟素组TG、TC、ALT、AST水平较模型组降低,差别有统计学意义（F=36.626～64.327,P〈0.01）;模型组大鼠较正常对照组小肠组织匀浆SOD活性明显降低（83.29±10.32U/mgprot对52.34±7.09U/mgprot）,MDA含量明显升高（0.56±0.07 Nmol/mgprot对0.97±0.09 Nmol/mgprot）,水飞蓟素组SOD活性较模型组有所升高,MDA水平下降,差异有统计学意义（F=23.488和10.609,P〈0.05）;内毒素水平为模型组（0.316±0.020EU/ml）〉水飞蓟素组（0.279±0.022EU/ml）〉正常对照组（0.234±0.021EU/ml）s;IgA水平为模型组〈水飞蓟素组〈正常对照组。结论抗氧化剂水飞蓟素不仅能提高肝脏本身的抗氧化能力,亦可以通过提高肠道抗氧化能力进而加强肠道的屏障作用。     

口服抗生素对NASH大鼠肝组织TLR4信号通路的影响

目的观察口服抗生素对非酒精性脂肪性肝炎大鼠代谢性内毒素血症激活肝脏4型Toll样受体(TLR4)信号通路的影响。方法将30只SD大鼠随机分为正常对照组、模型组和干预组,后者给予高脂饮食喂养,正常组予普通饲料喂养。干预组大鼠自第9周起给予环丙沙星灌胃。造模12周末,比较各组门静脉血内毒素、谷丙转氨酶、谷草转氨酶、甘油三酯和空腹血糖水平;计算非酒精性脂肪性肝病评分;采用Real time PCR及Westernblot法检测大鼠肝脏TLR4、胰岛素受体底物-1(IRS-1)mRNA及蛋白表达水平;采用ELISA法检测血清和肝匀浆肿瘤坏死因子-α(TNF-α)和白细胞介素-6(IL-6)水平。结果模型组动物门静脉内毒素为0.361±0.018EU/ml,而正常组为0.324±0.013EU/m(l P<0.05);肝脏TLR4 mRNA水平为正常组的7.7倍,IRS-1 mRNA水平下降69%,血清及肝脏TNF-α分别为105.7±30.1pg/ml和608.7±78.8pg/ml,IL-6分别为60.9±12.5pg/ml和756.4±90.8pg/ml,均显著高于正常组(P<0.05);与模型组比,干预组门静脉血内毒素为0.341±0.016EU/m(lP<0.05),NAS积分为4.40±0.26(P<0.05),肝脏TLR4 mRNA和蛋白表达水平分别下降44%和14%,肝脏IRS1 mRNA和蛋白表达水平分别增加2.3倍和1.6倍,TNF-α和IL-6水平分别为531.1±64.6pg/ml和575.1±84.5pg/m(lP<0.05)。结论 NASH大鼠肝脏TLR4信号通路被激活,口服抗生素可减少肠源性内毒素血症,减轻肝脏炎症。     

水飞蓟宾磷脂复合物对高脂饮食大鼠脂肪肝和动脉硬化的影响

目的探讨水飞蓟宾磷脂复合物（水林佳）对高脂饮食大鼠脂肪肝和动脉硬化造模形成的影响。方法22只SD大鼠随机分为3组,对照组（n=6）普通饮食饲养,模型组（n=8）和干预组（n=8）以高脂饮食＋维生素D＋丙基硫氧嘧啶造模,干预组同时在饮水中加用水林佳（225mg·kg^-1·d^-1）,各组大鼠均于实验第16周末处死,常规检测血液生化指标,并观察肝脏和主动脉壁病理改变。结果模型组出现明显的肝脏脂肪变、炎症和坏死,主动脉壁中膜轻度增厚,部分内皮下可见钙化斑,而水林佳干预组肝脏脂肪变和炎症程度较模型组明显改善（P〈0．05）,且伴血清转氨酶水平显著下降（P〈0．01）。然而,水林佳干预组血糖、血脂及主动脉粥样硬化病变情况较模型组无明显改变。结论水林佳能减轻高脂饮食脂肪肝大鼠脂肪性肝炎程度,但无改善糖脂紊乱和动脉硬化作用。     

Effect of Sinai san decoction on the development of non-alcoholic steatohepatitis in rats

AIM: To explore the effect of Sinai san decoction on the development of non-alcoholic steatohepatitis induced by CCL4 combined with a fat-rich diet in rats. METHODS: Twenty-seven Sprague-Dawley rats were divided into three groups randomly: control group (n=9), model group (n = 9) and treatment group (n = 9). The rats of model group and treatment group were given small dosage of CCL4 combined with a fat-rich diet, and those of control group were given normal diet. After four weeks of fat-rich diet feeding, the rats of treatment group were given Sinai san decoction. The serum levels of aminotransferase and lipid were measured, and the pathology of livers was observed by HE staining after the rats were sacrificed at eight weeks. RESULTS: The rats' livers presented the pathology of steatosis and inflammation with higher serum levels of ALT and AST in the model group. In the treatment group the serum ALT and AST levels decreased significantly and were close to the control group. The hepatic inflammation scores also decreased markedly, but were still higher than those of control group. And the degree of hepatocyte steatosis was similar to that of model group. CONCLUSION: Sinai san decoction may ameliorate the hepatic inflammation of rats with steatohepatitis induced by small dosage of CCL4 combined with a fat-rich diet, but does not prevent the development of hepatocyte steatosis.