活体供肾移植急性排斥反应发生与供受者年龄的关系

Relationship between acute rejection in living donor kidney transplantation and age of donors and recipients

目的探讨活体供肾移植受者发生急性排斥反应（acute rejection,AR）的年龄因素。方法对本移植中心2006年1月-2013年12月327例行活体供肾肾移植受者随访,供者年龄≥55岁定义为老年供者,受者年龄〈30岁定义为年轻受者。记录供、受者的临床基线特征;移植后第1、3、6、12、24、36、48、60个月均行随访,内容包括基本体格检查、病史、实验室检查、AR发病情况。应用单因素和Cox比例风险模型进行多因素分析,确定AR发病危险因素。结果 AR组随访时间为（35.9±13.2）个月,非AR组为（36.3±15.4）个月;肾移植术后受者前3个月内AR的发生率为7.3%（24/327）。AR组血肌酐水平、尿蛋白发生率高于同时间非AR组（P〈0.05）。多因素分析显示,老年供者年轻受者是AR的独立危险因素,相对危险度（relative risk,RR）为3.67（95%CI：2.61-4.58,P=0.002）。结论接受老年供肾的年轻受者是AR的独立危险因素。

Objective To investigate the effects of age on acute rejection（AR） in living donor kidney transplantation（LDKT） recipients. Methods This study was performed in 327 donor–recipient pairs of kidney transplantation in our center from January 2006 to December 2013. Donors with age over than 55 years were defined as elder donors, while recipients with age younger than 30 years were defined as young recipients. Clinical baseline data about donors and recipients were recorded and patients were followed up at 1, 3, 6, 12, 24, 36, 48, 60 months after transplantation with medical examination, medical history examination, laboratory examination, AR occurrence examination. The risk factors that might be associated with AR were analyzed using both univariate analysis and Cox proportional hazards regression modeling. Results The follow-up period of AR and without AR group was（35.9±13.2） months and（36.3±15.4） months, respectively. The incidence of AR in recipients within 3 months after transplantation was 7.3%（24/327）. The serum creatinine level and the incidence of proteinuria in AR group were higher than without AR group in the same period. Multivariate analysis revealed that young recipient who received older donor graft was an independent risk factor for AR with the relative risk（RR） of 3.67（95% CI： 2.61- 4.58, P=0.002）. Conclusion The independent risk factor of AR is young recipients who receive older donor graft.