title: [Persistently exist of ES-like cell population in long-term cultured embryoid bodies].
abstract: Undifferentiated embryonic stem (ES) cells can be maintained in vitro if cultured in the presence of the cytokine leukaemia inhibitory factor (LIF). ES cells can also differentiate in vitro. A particularly efficient method for inducing ES cell differentiation is to culture ES cells as aggregates in the absence of LIF. Under these conditions they form structures known as embryoid bodies (EBs). However the current protocols for EB formation are still diverse. In order to facilitate further study, we carefully controlled the culture conditions for EB formation, and here we report an efficient protocol by which uniformly differentiated EBs were obtained, monitored by measuring the differentiation of beating cardiomyocytes. Furthermore, by using this protocol we observed in long-term cultured plating EBs (> 60 days) there still exist cell colony with pluripotency. This observation raised a potential possibility that ES cells may keep pluripotent in a niche provided by differentiated cells.
authors.affiliation: School of Life Sciences and Technology, Shanghai Jiaotong University, Shanghai 200240, China.
authors.forename: Ke
authors.initials: K
authors.lastname: Yang
authors.forename: Juan
authors.initials: J
authors.lastname: Dong
authors.forename: Lan
authors.initials: L
authors.lastname: Xu
authors.forename: Zhenning
authors.initials: Z
authors.lastname: Zhou
authors.forename: Qin
authors.initials: Q
authors.lastname: Wang
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Ding
mesh_terms: D000818:Animals; D002454:Cell Differentiation / Q000502:physiology*; D002478:Cells, Cultured; D003470:Culture Media; D047108:Embryonic Development / Q000502:physiology*; D053595:Embryonic Stem Cells / Q000166:cytology*; D053605:Leukemia Inhibitory Factor / Q000494:pharmacology; D051379:Mice; D055153:Stem Cell Niche / Q000502:physiology*; D013997:Time Factors
chemical_list: D003470:Culture Media; C507837:LIF protein, human; D053605:Leukemia Inhibitory Factor