柴芩平胃胶囊对反流性胃炎胃粘膜细胞凋亡及调控基因的影响

目的]观察柴芩平胃胶囊（CQPC）对反流性胃炎模型大鼠胃粘膜细胞凋亡及调控基因的影响.方法]Wistar大鼠随机分为假手术组,模型组,CQPC高、中、低剂量组（剂量分别为16.66、8.33、4.17g/kg）,小柴胡冲剂组（10g/kg）;除假手术组外,均采用B-Ⅱ式胃部分切除（胃空肠吻合）术复制大鼠反流性残胃炎模型,各组按设计剂量灌胃给药,连续4周;分别采用ELISA、原位杂交、免疫组化方法观察CQPC对胃粘膜细胞凋亡及调控基因p53 mRNA、Bax和Bcl-2表达的影响.结果]模型组结果显示胆汁反流可引起模型大鼠胃粘膜细胞凋亡增加,野生型p53 mRNA、Bax蛋白表达上调,Bcl-2蛋白表达下调,与假手术组比较具有显著性差异（均P＜0.05或P＜0.01）;高、中、低剂量CQPC均可减少胆汁反流引起的细胞凋亡,减少野生型P53 mRNA、Bax蛋白表达,增加Bcl-2蛋白表达（均P＜0.05或P＜0.01）.结论]柴芩平胃胶囊治疗反流性胃炎的作用机制,可能与减少胃粘膜细胞凋亡,调节各种凋亡调控基因的表达有关.

Effect of Chai Qin Pingwei Capsule on Gastric Mucosal Cell Apoptosis and Regulatory Genes in Rats with Bile Reflux Gastritis

Objective] To observe the effect of Chai Qin Pingwei Capsule (CQPC) on gastric mucosal cell apoptosis and regulatory genes in rats with bile reflux gastritis. Methods ] Wistar rats were randomized into 6 groups: sham-operation group (A), model group (B) , CQPC groups in the dosages of 16.66 (high) ,8.33 (moderate), and 4.17 (low) g/kg respectively (C, D and E respectively), Xiao Chaihu Granules group in the dosage of 10g/kg (F). Except the sham-operation group, the rats in other groups received B- II gastrojejunostomy to induce bile reflux gastritis and were treated with gastric gavage of corresponding drugs according to the experimental design for 4 weeks. Effects of CQPC on gastric mucosal cell apoptosis and the expression of p53 mRNA, Bax and Bcl-2 were observed by enzyme-linked immunosorbent assay (ELISA), hybridization in situ and immunohistochemistry method. Results] Bile reflux in the model group caused the increase of gastric mucosal cell apoptosis, the up-regulation of wild-type p53 mRNA and Bax protein expression, and the down-regulation of Bcl-2 protein expression, the difference being significant as compared with the sham-operation group (P<0.05 or P<0.01). CQPC in high-, moderate-and low-dosage had counteractive action against the above changes (P < 0.05 or P < 0.01 compared with the model group). Conclusion] The therapeutic effect of CQPC for bile reflux gastritis may be related to the decrease of gastric mucosal cell apoptosis and the regulation of apoptotic regulatory genes.