Hematopoietic stem cell isolated from a healthy 39-year-old woman were successfully reprogrammed and transformed into induced pluripotent stem cell (iPSCs) by using the integration-free episomal vector included OCT3/4/shp53, Sox2/KLF4, L-MYC/LIN28 and EBNA-1 reprogramming factors. The transformed iPSC lines were cultured and expanded under feeder-free condition. They demonstrated the normal karyotype, expressed pluripotency markers and differentiated into cells derived from the three germ layers.
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