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那位能发给我Conversion of embryonic stem cells into neuroectodermal precursors in adherent monoculture 非常感谢！
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Nat Biotechnol. 2003 Feb;21(2):183-6. Epub 2003 Jan 13.
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% b) U3 }; l O% I( ?* [2 zConversion of embryonic stem cells into neuroectodermal precursors in adherent monoculture.
: D! `; v* h' M0 |Ying QL, Stavridis M, Griffiths D, Li M, Smith A.
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Institute for Stem Cell Research, University of Edinburgh, King's Buildings, West Mains Road, Edinburgh EH9 3JQ, United Kingdom.
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Mouse embryonic stem (ES) cells are competent for production of all fetal and adult cell types. However, the utility of ES cells as a developmental model or as a source of defined cell populations for pharmaceutical screening or transplantation is compromised because their differentiation in vitro is poorly controlled. Specification of primary lineages is not understood and consequently differentiation protocols are empirical, yielding variable and heterogeneous outcomes. Here we report that neither multicellular aggregation nor coculture is necessary for ES cells to commit efficiently to a neural fate. In adherent monoculture, elimination of inductive signals for alternative fates is sufficient for ES cells to develop into neural precursors. This process is not a simple default pathway, however, but requires autocrine fibroblast growth factor (FGF). Using flow cytometry quantitation and recording of individual colonies, we establish that the bulk of ES cells undergo neural conversion. The neural precursors can be purified to homogeneity by fluorescence activated cell sorting (FACS) or drug selection. This system provides a platform for defining the molecular machinery of neural commitment and optimizing the efficiency of neuronal and glial cell production from pluripotent mammalian stem cells. |
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发表于 2010-1-29 11:23
