TY  - JOUR
TI  - Feeder- and serum-free establishment and expansion of human induced pluripotent stem cells  
AU  - Totonchi, Mehdi
AU  - Taei, Adeleh
AU  - Seifinejad, Ali
AU  - Tabebordbar, Mohammadsharif
AU  - Rassouli, Hassan
AU  - Farrokhi, Ali
AU  - Gourabi, Hamid
AU  - Aghdami, Nasser
AU  - Hosseini-Salekdeh, Ghasem
AU  - Baharvand, Hossein
T2  - The International Journal of Developmental Biology
AB  - Although human induced pluripotent stem cells (hiPSCs) hold great promise as a source of differentiated cells for vast therapeutic implications, many obstacles still need to be surmounted before this can become a reality. One obstacle, a robust feeder- and serum-free system to generate and expand hiPSCs in culture is still unavailable. Here, for the first time, we describe a novel establishment and maintenance culture technique that uses human dermal fibroblasts to generate hiPSCs by introducing four factors, Klf4, Oct4, Sox2, and c-Myc under serum- and feeder-independent conditions. We have used a serum replacement product, conditioned medium (CM), or feeder-free medium (FFM) supplemented with high elevated basic-fibroblast growth factor in the absence or presence of Matrigel. Our FFM system in the presence of Matrigel enhanced the efficiency of alkaline phosphatase-positive colonies at a frequency at least 10-fold greater than the conventional method on feeder cells. The established hiPSCs are similar to human embryonic stem cells in many aspects including morphology, passaging, surface and pluripotency markers, normal karyotype, gene expression, ultrastructure, and in vitro differentiation. Such hiPSCs could be useful particularly in the context of in vitro disease modeling, pharmaceutical screening and in cellular replacement therapies once the safety issues have been overcome.
PY  - 2010
DO  - 10.1387/ijdb.092903mt
VL  - 54
IS  - 5
SP  - 877
EP  - 886
J2  - Int. J. Dev. Biol.
LA  - en
SN  - 0214-6282
SN  - 1696-3547
UR  - https://ijdb.ehu.eus/article/092903mt
Y2  - 2024/11/21/18:23:46
ER  -