应用Tail-cuff技术改良小鼠颈部异位心脏移植模型

背景:小鼠颈部心脏移植模型是研究移植缺血再灌注损伤和排斥反应的理想模型,由于显微血管吻合的技术问题,限制了小鼠颈部异位心脏移植模型在医学研究中的广泛应用.目的:应用Tail-cuff技术改良小鼠颈部异位心脏移植模型.方法:选用Balb/c→Balb/c小鼠进行同系心脏移植,C57BL/6→Balb/c小鼠进行同种心脏移植.将24G和22G静脉内导管制作成带有尾巴的套管(Tail-cuff),在受体血管准备时,Tail-cuff通过右颈外静脉或右颈总动脉近心端后,用显微血管夹一起固定其近心端和Tail-cuff管的尾巴,翻转血管并固定后分别与供心肺动脉主干和升主动脉连接固定.结果与结论:共36例次正式实验,12例次同系移植,24例次同种移植,移植成功率为100%.应用改良技术后总操作时间和心肌缺血时间分别缩短为(49.6±7.4)min和(28.8±4.2)min,尤其是血管翻转和与供心连接时间明显缩短.结果提示应用Tail-cuff技术建立小鼠颈部异位心脏移植模型显示出一定的优越性,是一种理想的方法.

Improvement of cervical heterotopic heart transplantation in mice using Tail-Cuff technique

BACKGROUND: The mouse model of cervical heart transplantation is an ideal medical research tool for study of transplant-induced ischemia/reperfusion injury and immunological rejection.However,technical problems have limited the widespread use of mouse cervical vascularized heart transplantation.OBJECTIVE: To improve the cervical heterotopic heart transplantation in mice using the tail-cuff technique.METHODS: Isogeneic transplantation was performed from Balb/c to BALB/c mice,and allogeneic transplantation from C57BL/6 to BALB/c mice.The right common carotid artery and the external jugular vein of the recipient were equipped with a tail cuff made from 24 G and 22 G intravenous catheter,and everted over the cuff,and then connected with the aorta and the pulonary artery of donor heart,respectively.RESULTS AND CONCLUSION: A total of 36 transplants for formal experiment,12 for isogeneic transplantation,and 24 for allogeneic transplantation,were performed with a surgical successful rate of 100%.The total surgical procedure was(49.6±7.4)minutes and total ischemic time of the grafts was(28.8±4.2)minutes.In particular,the average time for vascular everting and for the reconnection of both vessels was obviously shortened.This improved tail-cuff technique shows its superiority,and can serve as an ideal method for establishing cervical heterotopic heart transplantation model in mice.