Control of MT1-MMP transport by atypical PKC during breast-cancer progression

Carine Rosse*, Catalina Lodillinsky, Laetitia Fuhrmann, Maya Nourieh, Pedro Monteiro, Marie Irondelle, Emilie Lagoutte, Sophie Vacher, Francois Waharte, Perrine Paul-Gilloteaux, Maryse Romao, Lucie Sengmanivong, Mark Linch, Johan van Lint, Graca Raposo, Anne Vincent-Salomon, Ivan Bieche, Peter J. Parker, Philippe Chavrier

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    75 Citations (Scopus)

    Abstract

    Dissemination of carcinoma cells requires the pericellular degradation of the extracellular matrix, which is mediated by membrane type 1-matrix metalloproteinase (MT1-MMP). In this article, we report a co-up-regulation and colocalization of MT1-MMP and atypical protein kinase C iota (aPKC iota) in hormone receptor-negative breast tumors in association with a higher risk of metastasis. Silencing of aPKC in invasive breast-tumor cell lines impaired the delivery of MT1-MMP from late endocytic storage compartments to the surface and inhibited matrix degradation and invasion. We provide evidence that aPKC iota, in association with MT1-MMP-containing endosomes, phosphorylates cortactin, which is present in F-actin-rich puncta on MT1-MMP-positive endosomes and regulates cortactin association with the membrane scission protein dynamin-2. Thus, cell line-based observations and clinical data reveal the concerted activity of aPKC, cortactin, and dynamin-2, which control the trafficking of MT1-MMP from late endosome to the plasma membrane and play an important role in the invasive potential of breast-cancer cells.

    Original languageEnglish
    Pages (from-to)E1872-E1879
    Number of pages8
    JournalProceedings of the National Academy of Sciences of the United States of America
    Volume111
    Issue number18
    DOIs
    Publication statusPublished - 6 May 2014

    Keywords

    • membrane traffic
    • actin cytoskeleton
    • multi-vesicular body
    • MMP14
    • EXTRACELLULAR-MATRIX DEGRADATION
    • CELL INVASION
    • TUMOR-CELLS
    • INVADOPODIA FORMATION
    • CORTACTIN
    • METALLOPROTEINASE
    • EXPRESSION
    • POLARITY
    • OVEREXPRESSION
    • METASTASIS

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