中国组织工程研究 ›› 2014, Vol. 18 ›› Issue (37): 5993-5997.doi: 10.3969/j.issn.2095-4344.2014.37.016

• 干细胞移植 stem cell transplantation • 上一篇    下一篇

人脐带间充质干细胞修复大鼠放射复合皮肤损伤及其体外致瘤性

苏仲奕,杨在亮,汤永永,扈江伟,盛宏霞,徐  曼,张  斌,陈  虎   

  1. 军事医学科学院附属医院造血干细胞移植科,北京市  100071
  • 修回日期:2014-07-24 出版日期:2014-09-03 发布日期:2014-09-03
  • 通讯作者: 陈虎,博士,主任医师,教授,博士生导师,军事医学科学院附属医院造血干细胞移植科,北京市 100071 并列通讯作者:张斌,博士,副主任医师,副教授,军事医学科学院造血干细胞移植科,北京市 100071
  • 作者简介:苏仲奕,男,1989年生,河南省许昌市人,汉族,军事医学科学院附属医院造血干细胞移植科在读硕士,主要从事间充质干细胞基础与临床研究。

Human umbilical cord mesenchymal stem cells for repair of combined radiation-wound skin injury and tumorigenicity in vitro

Su Zhong-yi, Yang Zai-liang, Tang Yong-yong, Hu Jiang-wei, Sheng Hong-xia, Xu Man, Zhang Bin, Chen Hu   

  1. Department of Hemopoietic Stem Cell Transplantation, the Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, China
  • Revised:2014-07-24 Online:2014-09-03 Published:2014-09-03
  • Contact: Chen Hu, M.D., Chief physician, Professor, Doctoral supervisor, Department of Hemopoietic Stem Cell Transplantation, the Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, China Corresponding author: Zhang Bin, M.D., Associate chief physician, Associate professor, Department of Hemopoietic Stem Cell Transplantation, the Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, China
  • About author:Su Zhong-yi, Studying for master’s degree, Department of Hemopoietic Stem Cell Transplantation, the Affiliated Hospital of Academy of Military Medical Sciences, Beijing 100071, China

摘要:

背景:许多学者已经通过实验证实了间充质干细胞对于放射损伤具有明显的修复作用。
目的:初步研究人脐带间充质干细胞促进放射复合皮肤损伤修复的机制及其体外是否具有致瘤性。
方法:取SD大鼠15只,随机分3组(n=5),用直线加速器产生的β射线(40 Gy)照射大鼠右臀部2.5 cm×2.0 cm的区域,内做一直径约1.5 cm的圆形伤口。在制作大鼠损伤模型后12 h,分别经尾静脉注入5.0×106,1.0×107和2.0×107个人脐带间充质干细胞,腹腔注入荧光素(20 mg/kg),使用IVIS活体成像系统示踪人脐带间充质干细胞在大鼠体内分布。用软琼脂克隆形成实验观察人脐带间充质干细胞形成集落的能力。
结果与结论:活体成像实验表明,人脐带间充质干细胞经尾静脉注射后主要在肺脏中积聚。注射2.0×107个人脐带间充质干细胞组大鼠损伤部位出现了细胞积聚;而注射5.0×106个和1.0×107个人脐带间充质干细胞组大鼠损伤部位始终未见荧光信号。体外软琼脂克隆形成实验表明,人脐带间充质干细胞组在软琼脂上均未形成集落,而hela细胞阳性对照组可见明显集落形成。以上结果表明人脐带间充质干细胞可以通过局部迁移促进放射复合皮肤损伤修复,体外实验显示其在短期内不具有致瘤性。


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

关键词: 干细胞, 移植, 放射复合皮肤损伤, 人脐带间充质干细胞, 活体成像, 体外致瘤性

Abstract:

BACKGROUND: Many scholars have experimentally confirmed the obvious effect of mesenchymal stem cells to repair radiation injury.
OBJECTIVE: To preliminarily investigate the mechanism of human umbilical cord mesenchymal stem cells promoting the healing of combined radiation-wound skin injury and whether they possess tumorigenicity in vitro.
METHODS: Fifteen Sprague-Dawley rats were randomly divided into three groups, five rats in each group. The right buttock of rats (2.5 cm×2.0 cm) was irradiated with 40 Gy β-rays produced by a linear accelerator, in which a round wound with a diameter of 1.5 cm was made. After 12 hours of modeling, human umbilical cord mesenchymal stem cells at three concentrations (5.0×106, 1.0×107 and 2.0×107) were injected through tail vein of rats, and luciferin (20 mg/kg) was injected intraperitoneally. Cell distribution in vivo was traced using IVIS in vivo imaging system. The ability of human umbilical cord mesenchymal stem cells to form colonies was observed using the colony formation assay with soft agar.
RESULTS AND CONCLUSION: Human umbilical cord mesenchymal stem cells injected through tail vein of rats were mostly gathered in the lungs. Cells were accumulated in the injured site of rats injected with 2.0×107 human umbilical cord mesenchymal stem cells; however, the fluorescence signal was not observed in the injured site of rats injected with 5.0×106 and 1.0×107 human umbilical cord mesenchymal stem cells. The other results indicated human umbilical cord mesenchymal stem cells of low dose, medium dose and high dose had no colony formation on soft agar, but the tumor cells had a great ability to form colony. These findings indicate that human umbilical cord mesenchymal stem cells promote healing combined radiation-wound skin injury by local migration and exhibit no tumorigenicity in vitro in a short period.


中国组织工程研究杂志出版内容重点:干细胞;骨髓干细胞;造血干细胞;脂肪干细胞;肿瘤干细胞;胚胎干细胞;脐带脐血干细胞;干细胞诱导;干细胞分化;组织工程


全文链接:

Key words: umbilical cord, mesenchymal stem cells, radiation injuries, carcinogenicity tests

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