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    Nat Cell Biol. 2006 Jun;8(6):551-61. Epub 2006 May 21.

    p63 regulates an adhesion programme and cell survival in epithelial cells.

    Carroll DK, Carroll JS, Leong CO, Cheng F, Brown M, Mills AA, Brugge JS, Ellisen LW.

    Source

    Department of Cell Biology, Harvard Medical School, 240 Longwood Ave, Boston, MA 02115, USA.

    Abstract

    p63 is critical for epithelial development yet little is known about the transcriptional programmes it regulates. By characterising transcriptional changes and cellular effects following modulation of p63 expression, we have defined a vital role for p63 in cellular adhesion. Knockdown of p63 expression caused downregulation of cell adhesion-associated genes, cell detachment and anoikis in mammary epithelial cells and keratinocytes. Conversely, overexpression of the TAp63gamma or deltaNp63alpha isoforms of p63 upregulated cell adhesion molecules, increased cellular adhesion and conferred resistance to anoikis. Apoptosis induced by loss of p63 was rescued by signalling downstream of beta4 integrin. Our results implicate p63 as a key regulator of cellular adhesion and survival in basal cells of the mammary gland and other stratified epithelial tissues.

    PMID:
    16715076
    [PubMed - indexed for MEDLINE]

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