养肝柔肝中药对胆囊胆固醇结石豚鼠胆囊细胞钙离子浓度的影响

目的:通过观察实验豚鼠胆囊细胞钙离子浓度([Ca2 ]i)的变化,探讨胆固醇结石形成与养肝柔肝中药防治胆结石的作用机制。方法:将80只受试豚鼠随机分为正常对照组、模型组、养肝柔肝中药组和熊去氧胆酸组,每组20只。后三组采用高胆固醇致石食饵诱发法建立豚鼠胆结石动物模型,其中养肝柔肝中药组、熊去氧胆酸组分别给予相应药物进行防治实验,连续用药7周后,分别对实验豚鼠大体情况、胆结石生成情况以及胆囊细胞[Ca2 ]i的变化进行观察。结果:模型组动物胆囊细胞[Ca2 ]i明显降低,养肝柔肝中药不仅能明显改善豚鼠行为学体征,降低胆结石的成石率,而且可提高胆囊细胞[Ca2 ]i。结论:胆囊细胞[Ca2 ]i降低是导致胆囊的收缩功能降低,胆固醇结石形成的重要因素。提高胆囊细胞[Ca2 ]i,增强胆囊平滑肌细胞的收缩功能,减轻胆汁淤滞,可能是养肝柔肝中药防治胆石病的作用机制之一。

Effect of traditional Chinese herbs for nourishing the liver on intracellular free calcium level in gallbladder cells of guinea pigs with gallstones

Objective: To observe the changes of intracellular free calcium level ([Ca2 ]i) in gallbladder cells of guinea pigs with gallstones so as to study the mechanisms of gallstone formation and the prevention and treatment function of traditional Chinese herbs for nourishing the liver.Methods: Eighty guinea pigs were randomly divided into four groups, which were normal control group, untreated group, nourishing-liver Chinese drug (NLCD) group and ursodeoxycholic acid (UDCA) group, with 20 guinea pigs in each group. Gallstones were induced in the guinea pigs of the latter 3 groups by the feed of diet inducing cholelithiasis with high cholesterol, while the corresponding medicines were used in NLCD group and UDCA group for prevention and treatment for 7 weeks. Then the state of the guinea pigs, the formation of gallstones, and the changes of [Ca2 ]i in gallbladder cells were observed. Results: The [Ca2 ]i in gallbladder cells of guinea pigs in the untreated group was decreased significantly. NLCD improved the behavioral signs of the guinea pigs, significantly decreased the formative rate of gallstones and increased the [Ca2 ]i in gallbladder cells. Conclusions: The [Ca2 ]i in gallbladder cells is the important factor for contractile function of gallbladder and the information of gallstones. Traditional Chinese herbs for nourishing the liver may significantly increase the [Ca2 ]i in gallbladder cells to facilitate contraction of the smooth muscle cells of gallbladder and relieve the cholestatis. It may be one of the mechanisms of traditional Chinese herbs for nourishing the liver in preventing and treating cholelithiasis.