Chinese Journal of Tissue Engineering Research ›› 2014, Vol. 18 ›› Issue (10): 1591-1596.doi: 10.3969/j.issn.2095-4344.2014.10.018

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Proliferative abilities of placenta-derived mesenchymal stem cells at different passages

Bai Jin-ping1, Li Xiu-ying2, Li Xue3, Yang Qi-wei2, Liu Ying-nan2, Wang Yi-min 2, 4   

  1. 1 Department of Pathology, School of Basic Medical Sciences, Jilin University, Changchun 130021, Jilin Province, China; 2 Central Laboratory, China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China; 3 Department of Pharmacology, Yanbian University, Yanbian 133002, Jilin Province, China; 4 Jilin Zhongke Bio-engineering Co., Ltd., Changchun 130012, Jilin Province, China
  • Online:2014-03-05 Published:2014-03-05
  • Contact: Wang Yi-min, M.D., Doctoral supervisor, Central Laboratory, China-Japan Union Hospital, Jilin University, Changchun 130033, Jilin Province, China; Jilin Zhongke Bio-engineering Co., Ltd., Changchun 130012, Jilin Province, China
  • About author:Bai Jin-ping, Studying for master’s degree, Department of Pathology, School of Basic Medical Sciences, Jilin University, Changchun 130021, Jilin Province, China

Abstract:

BACKGROUND: The mesenchymal stem cells which are from the placenta have better proliferative potential than the bone marrow mesenchymal stem cells. It is inconclusive, however, whether placenta-derived mesenchymal stem cells at different passages have the same proliferative ability.
OBJECTIVE: To analyze the proliferative ability of placenta-derived mesenchymal stem cells.
METHODS: Placenta-derived human mesenchymal stem cells were isolated with enzyme digestion, and flow cytometry was used to detect the cell surface markers. After osteogenic and adipogenic induction, cell proliferation detection was carried out using cell counting and BrdU analysis. Cell doubling time was calculated based on formula. The maximum cell passage was determined by long term cell culture until the cell died or differentiated.
RESULTS AND CONCLUSION: CD44, CD90 and CD105 were highly expressed in placenta-derived mesenchymal stem cells, while CD14, CD34 and CD45 were negatively expressed. After 21 days of adipogenic induction, oil red O staining showed red fat droplets; after 35 days of osteogenic induction, alizarin red staining showed calcium nodules. Cell counting started from passage 1 to 25, and cell number reached to 3.5×1011 at passage 15. Cell proliferation at passage 5 was stronger with shorter doubling time than that at passages 10 and 15. When cells reached to passage 25, three specimens completely altered their cell morphology with cobblestone structure, and another two specimens lost adherent features. These findings indicate that 
placenta-derived mesenchymal stem cells can be long-term subcultured upon to passage 25. Different proliferation capacities are found in different passages of placenta-derived mesenchymal stem cells. The proliferation ability of passage 5 placenta-derived mesenchymal stem cells is stronger than that of passage 10 and 15 cells. Placenta-derived mesenchymal stem cells at passages 0-5 are the important source for stem cell therapy and tissue engineering.


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


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Key words: stem cells, mesenchymal stem cells, placenta, cell proliferation

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