慢性乙型肝炎患者外周血单个核细胞中IL-18表达水平

目的探讨白细胞介素 18(IL- 18)在乙型肝炎病毒感染中的作用。方法应用流式细胞免疫学方法 ,对 30例慢性乙型肝炎活动期、缓解期 ,15例 HBS Ag阳性无症状携带者 ,10例正常对照外周血单个核细胞 (PBMC) IL- 18的表达进行检测。结果无症状携带者表达最低 ,慢性乙型肝炎缓解期低于正常对照 (P<0 .0 1) ,活动期与正常对照无显著差异 (P=0 .2 5 )。活动期 IL- 18的表达与肝组织炎症活动度有关 (P<0 .0 1) ,与血清 AL T水平呈正相关 (r=0 .6 3,P<0 .0 1)。结论 IL- 18与慢性乙型肝炎病情的活动相关 ,与肝组织炎症程度相关

Expression of IL-18 in the peripheral blood mononuclear cells of chronic hepatitis B patients

Objective　 To investigated the possible roles of IL-18 in HBV infection, and the expression of IL-18 in the peripheral blood mononuclear cells (PBMC) of chronic hepatitis B. Methods 　In 15 cases of asymptomatic carriers, 30 cases of active and remissive phases of chronic hepatitis and 10 healthy individuals (as normal controls), IL-18 expression in PBMC were quantitatively analyzed with flow cytometric immunological method. The PBMC were separated routinely and stimulated with LPS (SIGMA) and Monensin (SIGMA) for 6 hours. Then the cells were harvested and fixed by PBS/4% paraformaldehyde. The treated cells were stored in liquid nitrogen for detection later. After immunologic stain, the expression of IL-18 in PBMC were examined by flow cytometry. Results　 ① IL-18 was the lowest in asymptomatic carriers. It was fewer in remissive phase than in normal controls (P＜0.01).There was no difference between active phase and normal controls(P=0.25).②Within the group of active phase, IL-18 was significantly different between each grade of inflammatory activity(P＜0.01),and correlated with serum ALT positively(r=0.63,P＜0.01). Conclusion　 IL-18 may relate to disease activity and the inflammation of liver.