UC患者PBMC中TLR4、NF-κB水平的变化及其临床意义

目的 探讨溃疡性结肠炎(UC)患者外周血单核细胞(PBMC)中TOLL样受体(TLR)4、NF-κB水平的变化及在UC发病中的可能机制.方法 选取武警浙江省总队医院嘉兴医院消化科2014年1月至2015年1月收治的UC患者30例作为观察组,另选取该院体检科健康体检者10例作为对照组.采用流式细胞仪检测外周血CD14+单核细胞表面TLR4阳性表达率,RT-PCR检测TLR4、髓样分化因子88(MyD88)、NF-κB(P65) mRNA表达水平,Western blot检测TLR4、MyD88、NF-κB(P65)蛋白水平.结果 观察组外周血CD14+单核细胞表面TLR4阳性表达率明显高于对照组(P＜0.05);对照组TLR4、MyD88、NF-κB(P65) mRNA及蛋白水平明显低于观察组(P＜0.01);TLR4、MyD88、NF-κB(P65)蛋白水平与UC严重程度呈正相关.结论 UC患者PBMC中TLR4、NF-κB明显增高,临床可通过检测TLR4、NF-κB水平判断UC的发展程度.

Changes and clinical significance of TLR4 and nuclear factor kappa B in peripheral blood mononuclear cells of patients with ulcerative colitis

Objective To investigate the changes of TLR4 and nuclear factor kappa B(NF-κB) levels in peripheral blood mononuclear cells(PBMC) of the patients with ulcerative colitis(UC) and its possible pathogenesis mechanism.Methods In our hospital from January 2014 to January 2015,30 cases of UC were selected as the observation group,and other 10 individuals undergoing healthy physical examination in this hospital were selected as the control group.Flow cytometry was used to detect the positive expression rate of TLR4 on surface of peripheral blood CD14+ mononuclear cells.The levels of TLR4,MyD88,NF-κB(P65)mRNA expression were detected by RT-PCR.Western blot was adopted to detect the levels of TLR4,MyD88,NF-κB(P65) protein.Results The positive expression rate of TLR4 on the surface of peripheral blood CD14+ mononuclear cells in the observation group was significantly higher than that in the control group(P＜0.05);the levels of TLR4,MyD88 and NF-κB(P65) B mRNA and protein in the control group were significantly lower than those in the observation group(P＜0.05);the levels of TLR4,MyD88 and NF-κB(P65) protein were positively correlated with the severity of UC.Conclusion The levels of TLR4 and NF-κB in PBMC of the patients with UC are significantly increased,clinic can judge the UC development degree by detecting TLR4 and NF-κB levels.