Lack of adenomatous polyposis coli protein correlates with a decrease in cell migration and overall changes in microtubule stability

Karin Kroboth, Ian P. Newton, Katsuhiro Kita, Dina Dikovskaya, Jürg Zumbrunn, Clare M. Waterman-Storer, Inke S. Näthke

    Research output: Contribution to journalArticlepeer-review

    95 Citations (Scopus)

    Abstract

    Most sporadic colorectal tumors carry truncation mutations in the adenomatous polyposis coli (APC) gene. The APC protein is involved in many processes that govern gut tissue. In addition to its involvement in the regulation of beta-catenin, APC is a cytoskeletal regulator with direct and indirect effects on microtubules. Cancer-related truncation mutations lack direct and indirect binding sites for microtubules in APC, suggesting that loss of this function contributes to defects in APC-mutant cells. In this study, we show that loss of APC results in disappearance of cellular protrusions and decreased cell migration. These changes are accompanied by a decrease in overall microtubule stability and also by a decrease in posttranslationally modified microtubules in the cell periphery particularly the migrating edge. Consistent with the ability of APC to affect cell shape, the overexpression of APC in cells can induce cellular protrusions. These data demonstrate that cell migration and microtubule stability are linked to APC status, thereby revealing a weakness in APC-deficient cells with potential therapeutic implications.
    Original languageEnglish
    Pages (from-to)910-918
    Number of pages9
    JournalMolecular Biology of the Cell
    Volume18
    Issue number3
    DOIs
    Publication statusPublished - Mar 2007

    Keywords

    • Acetylation
    • Adenomatous Polyposis Coli Protein
    • Cell Line, Tumor
    • Cell Movement
    • Cell Shape
    • Cell Surface Extensions
    • Fibroblasts
    • Humans
    • Microtubules

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