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    Cell Stem Cell. 2010 Jul 2;7(1):90-100. doi: 10.1016/j.stem.2010.04.017.

    Pax6 is a human neuroectoderm cell fate determinant.

    Zhang X, Huang CT, Chen J, Pankratz MT, Xi J, Li J, Yang Y, Lavaute TM, Li XJ, Ayala M, Bondarenko GI, Du ZW, Jin Y, Golos TG, Zhang SC.

    Source

    Waisman Center and the WiCell Institute, Madison, WI 53705, USA.

    Abstract

    The transcriptional regulation of neuroectoderm (NE) specification is unknown. Here we show that Pax6 is uniformly expressed in early NE cells of human fetuses and those differentiated from human embryonic stem cells (hESCs). This is in contrast to the later expression of Pax6 in restricted mouse brain regions. Knockdown of Pax6 blocks NE specification from hESCs. Overexpression of either Pax6a or Pax6b, but not Pax6triangle upPD, triggers hESC differentiation. However, only Pax6a converts hESCs to NE. In contrast, neither loss nor gain of function of Pax6 affects mouse NE specification. Both Pax6a and Pax6b bind to pluripotent gene promoters but only Pax6a binds to NE genes during human NE specification. These findings indicate that Pax6 is a transcriptional determinant of the human NE and suggest that Pax6a and Pax6b coordinate with each other in determining the transition from pluripotency to the NE fate in human by differentially targeting pluripotent and NE genes.

    Copyright (c) 2010 Elsevier Inc. All rights reserved.

    PMID:
    20621053
    [PubMed - indexed for MEDLINE]
    PMCID:
    PMC2904346
    Free PMC Article

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