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Title: Establishment of clinically compliant human embryonic stem cells in an autologous feeder-free system
Authors: Fu, X.
Toh, W.S. 
Liu, H. 
Lu, K.
Li, M.
Cao, T. 
Issue Date: 2011
Citation: Fu, X., Toh, W.S., Liu, H., Lu, K., Li, M., Cao, T. (2011). Establishment of clinically compliant human embryonic stem cells in an autologous feeder-free system. Tissue Engineering - Part C: Methods 17 (9) : 927-937. ScholarBank@NUS Repository.
Abstract: Applications of human embryonic stem cells (hESCs) are limited by the use of mouse embryonic fibroblasts feeder and animal-derived components during culture. In this study, we demonstrated the potential use of extracellular matrix (ECM) derived from the autologous feeders to support long-term undifferentiated growth of hESCs in xeno-free, serum-free, and feeder-free conditions. Autologous H9 ebF (feeder cells derived from outgrowth of embryoid body [EB] predifferentiated from H9 hESCs) was derived from EBs predifferentiated from H9 hESCs through a direct-plating outgrowth system. The ECM comprising collagen VI, laminin, and fibronectin was extracted from H9 ebF through a freeze-thaw procedure. The autologous ECM together with animal component-free TeSR™2 medium was used to support long-term growth of H1 and H9 hESC lines for up to 20 passages. The maintenance of hESC undifferentiated state by autologous ECM was confirmed by the positive staining of hESC-specific markers (Oct4, SSEA-4, and Tra-1-60) and the expression of pluripotency marker genes (Oct4, Nanog, and Sox2). Flow cytometry further showed that more than 99% of hESCs retained the expression of SSEA-3/4 after long-term culture on autologous ECM. Pluripotency of hESCs on ECM was further proven by in vitro EB formation and in vivo teratoma assay. Overall, this study suggested a strategy for efficient propagation of clinically compliant hESCs in an autologous feeder-free culture system. © 2011 Mary Ann Liebert, Inc.
Source Title: Tissue Engineering - Part C: Methods
ISSN: 19373384
DOI: 10.1089/ten.tec.2010.0735
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