大鼠肝移植术后受体骨髓间充质干细胞输注肝内示踪与标记方法比较

目的 采用羧基荧光素二醋酸盐琥珀酰亚胺酯(carboxyfluorescin diacetate succinimidyl ester, CFSE)与溴化脱氧尿嘧啶核苷(5-bromo-2-deoxyuridine,Brdu)两种细胞标记物观测肝移植术后受体骨髓间充质干细胞(MSCs)肝内分布情况.并对两种方法进行比较.方法 在已构建的DA-Lewis大鼠原位肝移植模型及提取培养Lewis大鼠MSCs的基础上分别用CFSE和Brdu对Lewis来源的MSCs进行标记,术中经门静脉输注,通过荧光显微镜和免疫组织化学法观测术后2mo内各时间点受体肝组织内MSCs的分布情况.结果 CFSE细胞标记率约为(94.1±1.4)%.受体肝组织第1、7、14天内有CFSE标记的MSCs聚集.对照组第5天肝组织内发布的CFSE标记MSCs消失.BrdU细胞标记率约为(90.3±3.5)%.受体肝组织第14天、1个月、2个月可见Brdu阳性的MSCs分布,对照组相应时间点肝组织内未发现Brdu阳性的MSCs.结论 CFSE和Brdu均为MSCs的良好标记物.CFSE标记细胞后荧光迅速减弱,适用于短期示踪.Brdu标记细胞后可维持较长时间,适用于长期示踪.两种标记方法均是MSCs较为简单有效的方法,实验显示受体MSCs大部分分布于移植肝脏.

Liver Localization of Bone Marrow Mesenchymal Stem Cells in Rat After Orthotopic Liver Transplantation

Objective To track CFSE and Brdu labeled bone marrow mesenchymal stem cells (MSCs) in rat after orthotopic liver transplantation. Method Orthotopic liver transplantation model was established using DA to Lewis rats with the two-cuff technique. MSCs from the bone marrow were labeled with CFSE and Brdu. The cells were then infused into recipient rat through portal vein after liver transplantation..The rate were killed and the livers were examined at day-1,day-7,day-14,1 month and 2 months after transplantatio...