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Characterization of MACS Isolated Cells from Differentiated Human ES Cells  

Cho, Jae Won (Laboratory of Reproductive Biology & Infertility, Cheil General Hospital)
Lim, Chun Kyu (Laboratory of Reproductive Biology & Infertility, Cheil General Hospital)
Shin, Mi Ra (Laboratory of Reproductive Biology & Infertility, Cheil General Hospital)
Bang, Kyoung Hee (Laboratory of Reproductive Biology & Infertility, Cheil General Hospital)
Koong, Mi Kyoung (Sungkyunkwan University School of Medicine)
Jun, Jin Hyun (Laboratory of Reproductive Biology & Infertility, Cheil General Hospital)
Publication Information
Clinical and Experimental Reproductive Medicine / v.33, no.3, 2006 , pp. 171-178 More about this Journal
Abstract
Objective: Human embryonic stem (ES) cells have a great potential in regenerative medicine and tissue engineering. The human ES cells could be differentiated into specific cell types by treatments of growth factors and alterations of gene expressions. However, the efficacy of guided differentiation and isolation of specific cells are still low. In this study, we characterized isolated cells from differentiated human ES cells by magnetic activated cell sorting (MACS) system using specific antibodies to cell surface markers. Methods: The undifferentiated hES cells (Miz-hESC4) were sub-cultured by mechanical isolation of colonies and embryoid bodies were spontaneously differentiated with DMEM containing 10% FBS for 2 weeks. The differentiated cells were isolated to positive and negative cells with MACS system using CD34, human epithelial antigen (HEA) and human fibroblast (HFB) antibodies, respectively. Observation of morphological changes and analysis of marker genes expression were performed during further culture of MACS isolated cells for 4 weeks. Results: Morphology of the CD34 positive cells was firstly round, and then it was changed to small polygonal shape after further culture. The HEA positive cells showed large polygonal, and the HFB positive spindle shape. In RT-PCR analysis of marker genes, the CD34 and HFB positive cells expressed endodermal and mesodermal genes, and HEA positive cells expressed ectodermal genes such as NESTIN and NF68KD. The marker genes expression pattern of CD34 positive cells changed during the extension of culture time. Conclusion: Our results showed the possibility of successful isolation of specific cells by MACS system from undirected differentiated human ES cells. Thus, MACS system and marker antibodies for specific cell types might be useful for guided differentiation and isolation of specific cells from human ES cells.
Keywords
Human embryonic stem cells; Differentiation; MACS system; Antibody;
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