Chinese Journal of Tissue Engineering Research ›› 2015, Vol. 19 ›› Issue (19): 2986-2992.doi: 10.3969/j.issn.2095-4344.2015.19.006

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Effect of umbilical cord mesenchymal stem cells on the growth of human breast cancer MCF-7 xenograft in a nude mouse 

Han Li-xin1, Han Zhi-bo1, Geng Jie2, Wang Bin2, Yan Shu-ling2, Mao Ai-bin2, Han Zhong-chao1, 2   

  1. 1State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China; 2National Engineering Research Center of Cell Products, Tianjin 300457, China
  • Online:2015-05-06 Published:2015-05-06
  • Contact: Corresponding author: Han Zhong-chao, Professor, State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China; National Engineering Research Center of Cell Products, Tianjin 300457, China
  • About author:Han Li-xin, Master, State Key Laboratory of Experimental Hematology, Institute of Hematology and Blood Diseases Hospital, Chinese Academy of Medical Sciences & Peking Union Medical College, Tianjin 300020, China
  • Supported by:

    the National Science and Technology Supporting Plan of China, No. 2013BAI01B09

Abstract:

BACKGROUND: Mesenchymal stem cells reveal notable therapeutic effects on diabetes, graft-versus-host disease and autoimmune diseases after allogeneic hematopoietic stem cell transplantation. Clinical safety is crucial for the clinical application of mesenchymal stem cells, and whether transplated mesenchymal stem cells can promote tumor growth in vivo or not is an important manifestation; however, fewer studies have been reported on this field.
OBJECTIVE: To observe the effect of umbilical cord mesenchymal stem cells on growth of human breast cancer MCF-7 xenograft in a nude mouse in vivo.
METHODS: Eight BALB/c nude mice were randomly selected as controls, and nude mice with human breast cancer MCF-7 xenograft were randomly divided into four groups with eight mice in each group: model control group, low-dose group, middle-dose group and high-dose group. Three different doses of umbilical cord 
mesenchymal stem cells (4×104, 2×105 and 1×106/mice) were given twice in the latter three groups, respectively, with an interval of 2 weeks. Healthy nude mice and MCF-7 tumor-burdened mice without transplantation were given normal saline. The experimental observation period was 6 weeks.
RESULTS AND CONCLUSION: The tumor size exhibited an increasing trend in the model control group. Umbilical cord mesenchymal stem cells could inhibit tumor growth, but there was no difference among different groups. Histopathological analysis showed that one mouse had lung metastases in either high-dose or middle dose-group. These findings indicate that umbilical cord mesenchymal stem cells cannot promote the tumor growth in a MCF-7 xenograft nude mouse, but they can accelerate the tumor metastases.

Key words: Umbilical Cord, Mesenchymal Stem Cell Transplantation, Breast Neoplasms, Mice, Nude

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