Objective To evaluate the value of immune cell functional assay (ImmuKnow CD4+ T cell ATP assay) in monitoring immune status in renal recipients.Methods A total of 131 adult renal transplant recipients who received transplantation for the first time were under investigation.According to the dynamic monitoring ATP concentration before operation,2 week,1,3,6 months after operation and during infect or rejection,samples were divided into the following groups:health control group (HC),pretransplant (Pre-Tx) group,stable (Tx) group,infect group,acute rejection (AR) group,acute kidney injury (AKI) group.Immune cell functions were detected by ImmuKnow CD4+ T cell ATP assay.Lymphocyte subsets (CD4+/CD8+) were analysed and serum concentrations of FK506 were tested.Mixed lymphocyte reaction(MLR) was analysed.Results The ATP concentration was no significant difference between Pre-Tx and HC group.The ATP concentration of 2 weeks,1 months after operation were significantly higher than Pre-Tx group (P ＜ 0.01).After 3 months,6 months follow-up,the ATP concentration stabilized with time.The ATP concentration of AR group was significantly higher than other three groups (Tx,infect and AKI group,all P ＜ 0.05).The correlation coefficient between the ATP concentration and MLR,CD4+/CD8+,FK506 level were R2=0.0072,R2=10-6,R2=0.004 respectively (all P ＞ 0.05).Conclusions The cell-mediated immunity of recipients is relatively strongger during the first month after transplantation.The ATP concentration is not related to the levels of MLR,CD4+/CD8+,FK506.ImmuKnow ATP assay is a valuable predictor in acute rejection diagnosis.

小鼠皮肤移植模型是研究T淋巴细胞识别同种异体抗原机制的标准方法,亦是探讨免疫排斥反应及鉴定近交系小鼠的基本方法之一[1].根据移植皮片的来源不同,目前常用的小鼠皮肤移植方法有背-背法、耳-背法、尾-背法等[2].我们在参考相关文献的基础上,建立小鼠耳朵来源皮片的皮肤移植模型,现报告如下。

器官移植免疫学的研究重点一直集中在获得性免疫系统,然而近年来病原相关分子的研究进展,使我们对于固有免疫系统开始了再认识的过程,对其在器官移植免疫排斥和耐受中的作用有了更深的了解。作为固有免疫系统的重要一员,中性粒细胞是最早进入移植物的白细胞,其早期浸润与移植免疫反应的发生密切相关。中性粒细胞作为专职吞噬细胞,在微生物感染以及炎症反应过程中发挥着重要作用,通过分泌细胞因子、直接和树突状细胞接触将其激活、直接提呈抗原等途径启动获得性免疫反应,成为连接固有免疫和获得性免疫的桥梁,中性粒细胞分泌的细胞因子募集移植物中活化的T淋巴细胞,促进T淋巴细胞的活化,我们将从两个方面总结近年来关于中性粒细胞在移植免疫反应中的作用所做的相关研究。

目的 应用实时荧光定量聚合酶链式反应(Q-PCR)方法测定端粒长度.方法 选取9种人类细胞株,提取基因组DNA,采用Q-PCR方法测定相对T/S比率,DNA印迹法测定末端限制性片段(TRF)长度,进行二者之间的相关性分析.结果 定量PCR测定端粒长度相对T/S比率为0.68±0.57,DNA印迹法测量平均TRF值为8.57±2.34,两种方法测定结果的相关性分析R2=0.7807(P＜0.01).结论 采用荧光定量PCR方法测量端粒长度具有重复性好、省时、简便、可靠的特点,可高通量处理大量样品.