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Tumorigenicity Evaluation of Umbilical Cord Blood-derived Mesenchymal Stem Cells
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  • Journal title : Toxicological Research
  • Volume 32, Issue 3,  2016, pp.251-258
  • Publisher : The Korean Society of Toxicology
  • DOI : 10.5487/TR.2016.32.3.251
 Title & Authors
Tumorigenicity Evaluation of Umbilical Cord Blood-derived Mesenchymal Stem Cells
Park, Sang-Jin; Kim, Hyun-Jung; Kim, Woojin; Kim, Ok-Sun; Lee, Sunyeong; Han, Su-Yeon; Jeong, Eun Ju; Park, Hyun-shin; Kim, Hea-Won; Moon, Kyoung-Sik;
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Mesenchymal stem cells (MSCs) have been identified in multiple types of tissue and exhibit characteristic self-renewal and multi-lineage differentiation abilities. However, the possibility of oncogenic transformation after transplantation is concerning. In this study, we investigated the tumorigenic potential of umbilical cord blood-derived MSCs (hUCB-MSCs) relative to MRC-5 and HeLa cells (negative and positive controls, respectively) both in vitro and in vivo. To evaluate tumorigenicity in vitro, anchorage-independent growth was assessed using the soft agar colony formation assay. hUCB-MSCs and MRC-5 cells formed few colonies, while HeLa cells formed a greater number of larger colonies, indicating that hUCB-MSCs and MRC-5 cells do not have anchorage-independent proliferation potential. To detect tumorigenicity in vivo, hUCB-MSCs were implanted as a single subcutaneous injection into BALB/c-nu mice. No tumor formation was observed in mice transplanted with hUCB-MSCs or MRC-5 cells based on macro- and microscopic examinations; however, all mice transplanted with HeLa cells developed tumors that stained positive for a human gene according to immunohistochemical analysis. In conclusion, hUCB-MSCs do not exhibit tumorigenic potential based on in vitro and in vivo assays under our experimental conditions, providing further evidence of their safety for clinical applications.
Tumorigenicity;Mesenchymal stem cells;Immunohistochemistry;Soft agar assay;
 Cited by
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