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牛黄参胶囊对小鼠免疫性肝损伤保护作用的实验研究
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摘要
1.目的
     本实验针对病毒性肝炎发病的免疫学机制,采用卡介苗(BCG)加酯多糖(LPS)联合诱导的免疫性肝损伤模型,通过测定动物血清ALT. AST值、肝组织超氧化物歧化酶(SOD)活力、脂质过氧化物丙二醛(MDA)的含量、肝组织病理形态及超微结构、过氧化损伤及免疫调节等途经,并做统计分析,评价牛黄参胶囊对免疫性肝损伤保护作用的效果,并探讨其作用机制,为牛黄参胶囊抗免疫性肝损伤提供了科学依据,并为牛黄参胶囊的进一步开发应用提供依据。
     2.方法
     将60只昆明小鼠随机分为正常组、BCG加LPS模型组、联苯双酯组、牛黄参胶囊高、中、低剂量组,每组1 0只。具体方法:按体重将60只小鼠编为1——60号,用DPS7.55统计软件进行处理:试验设计→完全随机分组→实验样本数60,分组组数6→确定,随机分为6组。
     实验室喂养一周,参考文献方法造模,除正常对照组外,其余组第一天均尾静脉注射BCG2.5mg/0.2m1.只(约5×107个活菌)造模。正常对照组、BCG加LPS模型组,自来水0.5ml/只,ig10天;联苯双酯组剂量12mgkg,ig10天。牛黄参胶囊高、中、低剂量组分别给予牛黄参胶囊内容物水溶液以3400mg/kg.1700mgkg.850mg/kg灌胃10天。除正常对照组外,各组动物均于末次给药后,尾静脉注射LPS7.5μg/0.2ml.只。具体方法:先将小鼠固定于小鼠固定器内,让尾部全部露到固定器外,用75%乙醇擦拭尾部,使其充血。选择一根最为充盈的血管,用左手捏住尾巴的末端,右手持装有四号针头的注射器,以30°角进行静脉穿刺推注药液无阻力感,且可见沿静脉血管出现一条白线,则表明针头确实在血管内,即可继续推完药液。注射完毕后,拔出针头,轻按注射部位止血。注射后禁食不禁水,10小时后,进行模型处理。小鼠用0.03g/10g水合氯醛麻醉后,眼眶取血1.0ml,以无菌试管采集,离心血清,上全自动血生化仪,检测ALT、AST水平。采血前称小鼠体重,采血后断头处死小鼠,小鼠处死后取肝组织,用20%甲醛固定,常规石蜡包埋切片,行HE染色,光镜观察组织病理,参照免疫性肝损伤实验研究相关文献和肝组织形态学相关研究文献资料,根据肝组织炎症、坏死及出血程度,将肝组织病理改变分级。
     切取左前叶肝组织0.5—1.0 g,冷生理盐水冲洗,滤纸吸干,称重,冰浴中制成10%肝匀浆,以4000转/min,低温离心15分钟,取上清液。按步骤测定SOD活性,检测丙二醛含量,其操作步骤按试剂盒说明书进行。TNF-α活性、IL-6活性检测采用ELISA法,按试剂盒说明操作。实验数据用均数±标准差(X士S)表示,组内比较:t检验;组间比较:方差分析。P<0.05认为差异具有统计学意义。用SPSS 13.0统计软件分析。
     3.结果
     (1)各治疗组ALT、AST值较模型组明显降低(P<0.05),说明牛黄参胶囊能有效防止免疫性肝损伤引起的肝功能减退。
     (2)各治疗组病理结构明显优于模型组(P<0.05),证明牛黄参胶囊能有效防止BCG加LPS对小鼠肝脏组织结构的免疫性损伤。
     (3)各治疗组肝组织匀浆SOD活性明显高于模型组,MDA含量明显低于模型组,差异有显著性意义(P<0.05),说明牛黄参胶囊具有抗氧化、清除自由基的作用。
     (4)各治疗组TNF-α、IL-6的含量明显低于模型组,差异有显著性意义(P<0.05),说明牛黄参胶囊抗肝损伤的作用可能与其抑制细胞毒因子TNF-α、IL-6的释放有关。
     (5)中剂量组牛黄参胶囊的各项指标与联苯双酯组比较无显著性差异,说明其疗效与联苯双酯相当。
     4.结论
     (1)牛黄参胶囊能减轻BCG加LPS免疫性肝损伤对小鼠肝脏病理结构的破坏,保护其肝功能。
     (2)牛黄参胶囊最佳剂量与联苯双酯疗效相当。
1.Purpose
     This experiment for viral hepatitis, using the pathogenesis of immunological mechanisms BCG plus LPS polysaccharides joint induction reexposed liver damage model, by means of measuring the animal serum ALT, AST value, liver tissue superoxide dismutase (SOD) vigor, lipid peroxide malondialdehyde (MDA), liver tissue pathology form and ultrastructure, peroxidation damage and immune adjusting etc through, and do statistical analysis, evaluation NHS on immunity liver injury protection effect, and discuss the mechanism for NHS capsule resistance to damage the liver immunity provides scientific basis for NHS and participation in clinical application and development of capsule to provide the basis.
     2.Methods
     Kunming mice only 60 were randomly divided into normal group, BCG add LPS model group, Biphenyl Dicarboxylate group, NHS capsule of high,medium and low doses groups of 10 only. Methods:according to the weight will be 60 mice dungenzhai yishu 1-60#, with DPS7.55 statistical software for processing:experimental design and the complete randomized-60, grouping experiments sample number of groups 6, OK.
     Laboratory feeding a week, reference method made modules, except normal control group outside, the rest group first day all tail intravenous BCG2.5mg/0.2ml. one (about 5×107 living bacterium) made moulds. Normal control group, BCG add LPS model group,tap water 0.5ml. ig 10 days; only, Biphenyl Dicarboxylate group 12mg/kg doses, ig 10 days. NHS capsule is tall, medium, low doses groups were given NHS 3400mg/kg,1700mg/kg,850mg/kg gastric lavage 10 days. Besides the normal control group outside, each animal in all the end time after the treatment, tail intravenous LPS 7.5μg/0.2 ml one. Methods:first mouse fixed in mice holder, let the tail to set all dew outside, with 75% ethanol is wiped the tail, make its hyperemia. Choose a root most plentiful vein, left-handed means and index finger knead tail end, right hand holding the syringe needle with 4, with 30 degree Angle were venipuncture push note solution frictionless feeling, and visible along the veins appear a white line, indicates that needle indeed inside blood-vessel, can continue to push finish solution. After completion, uproot needle injection, lightly in injection site bleeding. After injection fasting not water, after 10 hours for model processing.Mice with 0.03g/10g hydration after anesthesia, orbit chlorine aldehyde take blood 1.0 ml, with sterile tubes collection, centrifugal serum, blood biochemistry analyzer, the automatic detection ALT, AST level. Former says mice weight, blood collection after death mice, anatomical dislocated take liver and spleen weighing, calculation, liver and spleen visceral index. Mice executed after take liver tissue, using formaldehyde is fixed, the conventional 20% paraffin embedding slice, did HE histopathological staining light microscopy, consult immunity liver injury experimental study relevant literatures and liver tissue morphological related research literature, according to the liver tissue inflammation and necrosis and haemorrhage degree, will the liver tissue pathology change five levels.
     Cut take left medial liver tissue 0.5-1.0g, cold saline flush filter paper blot, weighing, ice bath of liver homogenate made by 10%,4000 turn/min, cryogenic centrifugal 15min, fetch the supernatant fluid. According to the instruction using glucosinolate and detect malondialdehyde (mda), determining SOD activity. Its operation step by kit instructions. TNF-cactivity, IL-6 active detection by ELISA, press kit that operation. Experimental data with mean+standard deviations (X±S) said, and in groups; t test comparison:Comparison:analysis of variance between groups. P<0.05 think differences are statistically significant. With SPSS 13.0 statistical software analysis.
     3.Results
     (1) The treatment group ALT, AST value significantly lower than that in model group(P<0.05),indicating that NHS capsules can effectively prevent the immunity liver damage caused by the liver function decreases.
     (2) The treatment group pathological structure obviously better than the model group(P<0.05), proof NHS capsules can effectively prevent the BCG add LPS of mouse liver tissue structure reexposed damage.
     (3) Various treatment group liver tissue homogenate SOD was obviously higher than model group, MDA content obviously lower than model group,there is a significant difference significance(P<0.05),indicating that NHS capsule of antioxidation, scavenging free radicals role.
     (4) Each treatment group TNF-α;IL-6 value obviously lower than model group,there is a significant difference significance(P<0.05), indicating that NHS capsule resistant to damage the liver function probably with its inhibition cytotoxic factor TNF-α,IL-6 the release of the relevant.
     (5) Medium NHS capsule group all indexes of double ester group compared with biphenyl non-significance difference, explain various aspects and Biphenyl Dicarboxylate curative effect quite.
     4.Conclusion
     (1) NHS capsules can reduce BCG and LPS immunity liver damage on mice hepatic pathology structural damage and to protect its liver function.
     (2) NHS capsule dose and Biphenyl Dicarboxylate curative effect quite.
引文
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