藿香正气胶囊对菌群失调小鼠黏膜免疫的影响

目的：研究藿香正气双向胶囊对福氏痢疾杆菌和鼠伤寒沙门氏菌所致菌群失调腹泻小鼠(BSD小鼠)黏膜免疫的影响。方法：清洁级健康Balb/c雄性小鼠50只,将小鼠随机分成正常组、正常给药组、模型组、藿香正气高剂量组(藿高组)、藿香正气低剂量组(藿低组)5组,每组10只。正常组及模型组给予等体积生理盐水灌胃,正常给药组给予藿香正气药液5.21 g·kg^-1,藿高组5.21 g·kg^-1,藿低组0.52 g·kg^-1,各组于造模后当天给药,每日1次,连续3 d。流式法检测外周血和肠道peyer patches(PP结)淋巴细胞亚群；放免法检测外周血清和肠组织匀浆肿瘤坏死因子(TNF-α)。结果：BSD小鼠腹泻明显,外周血和PP结CD4⁺,CD8⁺T淋巴细胞紊乱,外周血和肠组织TNF-α升高。藿香正气双向胶囊可减少BSD小鼠腹泻次数,缩短病程,调节CD4⁺,CD8⁺T淋巴细胞平衡,降低TNF-α。结论：BSD小鼠表现出T淋巴细胞亚群紊乱,炎症反应增强,免疫功能异常,而藿香正气双向胶囊可改善腹泻症状及其伴随的免疫异常,这可能是藿香正气双向胶囊预防和治疗菌群失调腹泻的机制之一。

Effects of Huoxiang Zhengqi liquid on enteric mucosal immune responses in mice with Bacillus dysenteriae and Salmonella typhimurium induced diarrhea

OBJECTIVE: To explore the effects of Huoxiang Zhengqi liquid (HXZQ) on enteric mucosal immune responses in mice with Bacillus dysenteriae and Salmonella typhimurium induced diarrhea (BSD). METHOD: Mice were randomly divided into four groups with 10 mice in each group: control group (control), BSD group, Huoxiang Zhengqi liquid treated BSD groups at high dosage and low dosage (HXZQ high, HXZQ low). HXZQ was administrated from the day of diarrhea induction at dosage of 5.21 g kg(-1) and 0.52 g kg (-1) respectively. Peyer's patch and periphery lymphocytes were prepared for flow cytometry, and level of TNF-alpha in periphery and enteric tissue homogenate were determined with ELISA. Student's t-test was used for statistics. RESULT: Mice in BSD group started showing continuous diarrhea at the day of induction till the fourth day when the mice were sacrificed. Diarrhea in the mice of HXZQ high and low groups lasted for 36 and 54 h respectively. There were more CD4+ and CD8+ cells in periphery, less CD4+ cells in peyer's patch in BSD mice comparing to normal mice. In peyer's patch, there were more CD8+ cells in mice in HXZQ high and low groups and more CD4+ in mice in HXZQ high group. Higher level TNF-alpha in periphery and intestinal tissue homogenate in BSD group were observed. Mice in HXZQ high group showed the decreased level TNF-alpha in periphery and enteric tissue homogenate. CONCLUSION: The immune regulation on peyer's patch CD4+ and CD8+ cells and suppression on TNF-alpha level in enteric homogenate might partially explain the effect of HXZQ on improvement of BSD.