Development of a xeno-free feeder-layer system from human umbilical cord mesenchymal stem cells for prolonged expansion of human induced pluripotent stem cells in culture

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Abstract

Various feeder layers have been extensively applied to support the prolonged growth of human pluripotent stem cells (hPSCs) for in vitro cultures. Among them, mouse embryonic fibroblast (MEF) and mouse fibroblast cell line (SNL) are most commonly used feeder cells for hPSCs culture. However, these feeder layers from animal usually cause immunogenic contaminations, which compromises the potential of hPSCs in clinical applications. In the present study, we tested human umbilical cord mesenchymal stem cells (hUC-MSCs) as a potent xeno-free feeder system for maintaining human induced pluripotent stem cells (hiPSCs). The hUC-MSCs showed characteristics of MSCs in xeno-free culture condition. On the mitomycin-treated hUC-MSCs feeder, hiPSCs maintained the features of undifferentiated human embryonic stem cells (hESCs), such as low efficiency of spontaneous differentiation, stable expression of stemness markers, maintenance of normal karyotypes, in vitro pluripotency and in vivo ability to form teratomas, even after a prolonged culture of more than 30 passages. Our study indicates that the xeno-free culture system may be a good candidate for growth and expansion of hiPSCs as the stepping stone for stem cell research to further develop better and safer stem cells.

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APA

Zou, Q., Wu, M., Zhong, L., Fan, Z., Zhang, B., Chen, Q., & Ma, F. (2016). Development of a xeno-free feeder-layer system from human umbilical cord mesenchymal stem cells for prolonged expansion of human induced pluripotent stem cells in culture. PLoS ONE, 11(2). https://doi.org/10.1371/journal.pone.0149023

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