Chinese Journal of Tissue Engineering Research ›› 2013, Vol. 17 ›› Issue (49): 8520-8526.doi: 10.3969/j.issn.2095-4344.2013.49.009

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Transplantation of human umbilical cord mesenchymal stem cells at different gestational age for myocardium revascularization after myocardial infarction

Wu Li-ping1, Cai Li1, Tao Jian-hong1, Cao Mei2, Zhu Yi-fan3, Li Jin-song1, Wang Yan4   

  1. 1Department of Cardiology, 2Clinical Laboratory, 3Organ Transplantation Center, 4Department of Hematology, Sichuan Provincial People’s Hospital, Chengdu  610072, Sichuan Province, China
  • Revised:2013-09-14 Online:2013-12-03 Published:2013-12-03
  • Contact: Cai Li, Master, Professor, Master’s supervisor, Department of Cardiology, Sichuan Provincial People’s Hospital, Chengdu 610000, Sichuan Province, China scsrmyyyb@163.com
  • About author:Wu Li-ping★, Studying for master’s degree, Physician, Department of Cardiology, Sichuan Provincial People’s Hospital, Chengdu 610072, Sichuan Province, China wlp3124558@yahoo.com.cn
  • Supported by:

    the Applied Basic Research Program of Sichuan Province, No. 2009JY0094*; the Youth Foundation of Sichuan Province, No. 2011JQ0018*

Abstract:

BACKGROUND: Transplantation of stem cells has a beneficial effect on myocardium revascularization and improving cardiac function after myocardial infarction, and HLA-G protein contributes to the formation and maintenance of the immune tolerance.
OBJECTIVE: To investigate the transplantation effects of human umbilical cord mesenchymal stem cells at different gestational age with different HLA-G expression levels on myocardium revascularization after myocardial infarction in rabbits.
METHODS: Thirty healthy New Zealand rabbits were selected and were randomly divided into human small gestational age umbilical cord-derived mesenchymal stem cells transplantation group, human full-term umbilical cord-derived mesenchymal stem cells transplantation group and control group. After the rabbits models of acute myocardial infarction had been established, the former two groups were infused different umbilical cord-derived human umbilical cord mesenchymal stem cells labeled with 5-bromo-2-deoxyuridine into the edge and center of myocardial infarct region by multipoint injection. Rabbits in the control group were subjected to an equal volume of serum-free culture medium.
RESULTS AND CONCLUSION: Four weeks after cell transplantation, 5-bromo-2-deoxyuridine-positive cells were found surrounding the infarct site in both transplantation groups. Myocardial fibrosis and myocardial infarct size were significantly lower in both transplantation groups than those of the control group (P < 0.05), and there was a significant difference between the two transplantation groups (P < 0.01). The positive staining of factor VII indicated that capillary density was increased significantly in the small gestational age umbilical cord-derived mesenchymal stem cells transplantation group as compared with the full-term umbilical cord-derived mesenchymal stem cells transplantation group (P < 0.01), and a sstatistical difference was found between two transplantation groups and the control group (P < 0.01). Transplantation of human umbilical cord mesenchymal stem cells with high HLA-G expression increases new capillary vessels and improves myocardium revascularization. All indicate that human small gestational age umbilical cord mesenchymal stem cells have the potential to become the better source of cardiomyocytes transplantation.


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: mesenchymal stem cells, umbilical cord, mesenchymal stem cell transplantation, myocardial infarction

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