【摘要】 目的　探讨同种异体肾移植术后嵌合体表达情况与免疫耐受的相关性。　方法　采用3对引物 ,应用PCR和RT PCR方法 ,检测接受男性供体肾移植的女性受者外周血及尿沉渣Y染色体特异片段DNA和mRNA表达 ,进行嵌合体与免疫耐受相关性研究。　结果　 176例女性受者嵌合阳性 137例 ( 77.84 % ) ,阴性 39例 ( 2 2 .16 % )。阳性组平均存活时间 ( 8.9± 3.7)年 ,阴性组 ( 5 .2± 3.9)年 ,差异有显著性意义 (P <0 .0 5 ) ;阳性组发生排斥反应 15例 ( 10 .9% ) ,阴性组 11例 ( 2 8.2 % ) ,差异有显著性意义 (P <0 .0 5 )。　结论　肾移植术后受者体内嵌合状态与免疫耐受相关 ,微嵌合体可以作为器官移植免疫耐受监测的生物学参考指标更多还原

【Abstract】 Objective To investigate the relationship between microchimerism and immunologic tolerance in kidney transplantation recipients. Methods In samples of peripheral blood and urinary sediment from 176 females who received male donor’s kidney,DNA and mRNA expression of specific fragment in Y chromosome were determined by PCR and RT PCR. Results The test results were positive for chimerism in 137 out of 176 recipients(77.84%),and negative in 39 cases (22.16%).The mean survival period in chimerism positive group was 8.9±3.7 years,and 5.2±3.9 years in chimerism negative group.The difference was statistically significant between the 2 groups ( P <0.05).Fifteen recipients (10.9%) in chimerism positive group and 11 (28.2%) in chimerism negative group suffered from rejection. The difference between the 2 groups was also significant ( P <0.05). Conclusions Chimerism status of recipients after renal transplantation is related to immunologic tolerance of the body.Microchimerism can be used as a marker in monitoring immunologic tolerance in organ transplantation.更多还原