诱导型一氧化氮合酶与血红素氧合酶在人肠易激综合征结肠中的表达

目的　研究诱导型一氧化氮合酶(iNOS)与血红素氧合酶 l(HO 1)在肠易激综合征(IBS)患者结肠中 的表达,探讨气体信使分子一氧化氮(NO)和一氧化碳(CO)在IBS发病机制中的可能作用。　方法　采用免疫组织 化学EnVision和SABC染色法,对符合罗马Ⅱ诊断标准的34例IBS患者肠镜活检标本分别检测结肠黏膜组织中 iNOS和HO 1的阳性细胞,并以16名健康者做对照。　结果　iNOS和HO 1主要表达在结肠黏膜上皮细胞,IBS患 者表达强于对照组(P<0.001),且HO 1和iNOS表达呈正相关(r=0.5744,P=0.0004)。　结论　iNOS和HO 1在 IBS患者结肠中的表达异常,表明CO和NO在IBS等肠动力性疾病的发病机制中可能起重要作用。

EXPRESSION OF INDUCIBLE NITRIC OXIDE SYNTHASE AND HEME OXYGENASE-1 IN HUMAN COLON OF IRRITABLE BOWEL SYNDROME

Objective To detect the expression of inducible nitric oxide synthase (iNOS) and heme oxygenase-1(HO-1) in human colon of irritable bowel syndrome(IBS), aim at finding out the role of gas messenger molecule such as nitric oxide(NO) and carbon monoxide(CO) in the pathogenesis of IBS. Methods The expression of iNOS and HO-1 in human colonic tissue specimen of enteroscope was detected by En vision and SABC immunohistochemistry each in 34 cases of IBS and 16 cases of normal control group. Results The expression of iNOS and HO-1 expressed mainly in the colonic mucous membrane epithelia, and the expression in IBS group was higher than that in normal control group(P<0.001). Moreover the expression of HO-1 expression was positively correlated with iNOS expression in colonic tissue of IBS(r=0.5744,P=0.0004). Conclusion The abnormal expression of HO-1 and iNOS in colonic tissue of IBS suggests that CO and NO may play an important role in the pathogenesis of intestinal motility disorders such as IBS.