Study on the expression of Runx3 and TGF-β_1 protein in the colonic tissue from rats with irritable bowel syndrome

Objective:To investigate the expression of Runx3 and TGF-β_1 protein in the colon from rats with irritable bowel syndrome(IBS).Methods:Rat model for IBS was established by intracolonic instillation with acetic acid and restraint stress methods,which was confirmed by determinating the visceral sensitivity of the animals,including abdominal withdrawal reflex (AWR) score and the electronic behavior of the abdomen wall.The rats were randomly assigned into three groups:IBS,group(restraint stress,n=25);IBS_2 group(both instillation with acetic acid and restraint stress,n=25) and Control group(n=16).The colonic tissue samples were collected for histological study and the expression of Runx3 and TGF-β_1 proteins were detected by immunohistochemistry.Meanwhile,the relationship of these two proteins was calculated. Results:Visceral hypersensitivity(AWR and abdominal electrical activity) was significantly enhanced in IBS,and IBS_2 groups than other groups.The colon tissue in all groups did not show any signs of inflammation.Furthermore,the expression of Runx3 and TGF-β_1 protein in the colon from all groups show no significant difference(P>0.05),with no remarkable relevancy between each other(P>0.05).Conclusions:The rat model for IBS was successfully established. We did not find any significant changes in the expression of Runx3 and TGF-β_1 protein in the colon tissue from IBS rats,suggesting that the quantitative changes may be not the way by which Runx3 and TGF-β_1 protein play their roles in IBS.The accurate roles of Runx3 and TGF-β_1 proteins in the pathogenesis of IBS remains to be further studied.

Colonic expression of Runx3 protein and TGF-β_1 and their correlation in patients with irritable bowel syndrome

Objective:To investigate the role of Runx3 protein and TGF-β_1 in the pathogenesis of irritable bowel syndrome(IBS),as well as the correlation of these two proteins.Methods:Colonic tissue was collected from patients with IBS and normal persons.The colonic expression of Runx3 protein and TGF-β_1 was detected with immunohislochemistry method.Semi-quantitative analysis was used to evaluate the staining degree of these two proteins.Results:Compared with their counterparts,patients with IBS did not show any changes in the colonic expression of Runx3 protein and TGF-β_1(P>0.05).Interestingly,there was a significant correlation between Runx3 protein and TGF-β_1 in patients with IBS(P<0.05).Conclusions:The role of Runx3 protein and TGF-β_1 in the pathogenesis of IBS remains to be further studied.

Runx3蛋白在肠易激综合征大鼠模型中的表达

目的:观察Runx3蛋白在肠易激综合征(IBS)大鼠模型肠黏膜组织中的表达,探讨抑癌基因在IBS发病机制中的作用。方法:采用乙酸灌肠和束缚应激方法制造IBS大鼠模型,同时设立正常对照组,进行内脏敏感性评价后,用免疫组化的方法检测Runx3蛋白在IBS大鼠模型组和对照组肠黏膜组织中的表达情况。结果:两组IBS大鼠腹外斜肌收缩次数在不同扩张容量下均较对照组明显增加(P<0.05)。组织学分析显示各组大鼠均无明显炎症性表现。Runx3蛋白在各组肠黏膜组织均有表达,各组之间的差异无统计学意义(P>0.05)。结论:Runx3在IBS发病中的作用有待于进一步研究。