Počet záznamů: 1  

Mechanosensing through focal adhesion-anchored intermediate filaments

  1. 1.
    0440964 - ÚMG 2015 RIV US eng J - Článek v odborném periodiku
    Gregor, Martin - Osmanagic-Myers, S. - Burgstaller, G. - Wolfram, M. - Fischer, I. - Walko, G. - Resch, G.P. - Jorgl, A. - Herrmann, H. - Wiche, G.
    Mechanosensing through focal adhesion-anchored intermediate filaments.
    FASEB Journal. Roč. 28, č. 2 (2014), s. 715-729. ISSN 0892-6638. E-ISSN 1530-6860
    Grant CEP: GA MŠMT(CZ) ED1.1.00/02.0109
    Institucionální podpora: RVO:68378050
    Klíčová slova: vimentin * plectin * integrin * activation * cellmotility
    Kód oboru RIV: EB - Genetika a molekulární biologie
    Impakt faktor: 5.043, rok: 2014

    Integrin-based mechanotransduction involves a complex focal adhesion (FA)-associated machinery that is able to detect and respond to forces exerted either through components of the extracellular matrix or the intracellular contractile actomyosin network. Here, we show a hitherto unrecognized regulatory role of vimentin intermediate filaments (IFs) in this process. By studying fibroblasts in which vimentin IFs were decoupled from FAs, either because of vimentin deficiency (V0) or loss of vimentin network anchorage due to deficiency in the cytolinker protein plectin (P0), we demonstrate attenuated activation of the major mechanosensor molecule FAK and its downstream targets Src, ERK1/2, and p38, as well as an up-regulation of the compensatory feedback loop acting on RhoA and myosin light chain. In line with these findings, we show strongly reduced FA turnover rates in P0 fibroblasts combined with impaired directional migration, formation of protrusions, and up-regulation of stretched high-affinity integrin complexes. By exploiting tension-independent conditions, we were able to mechanistically link these defects to diminished cytoskeletal tension in both P0 and V0 cells. Our data provide important new insights into molecular mechanisms underlying cytoskeleton-regulated mechanosensing, a feature that is fundamental for controlled cell movement and tumor progression.Gregor, M., Osmanagic-Myers, S., Burgstaller, G., Wolfram, M., Fischer, I., Walko, G., Resch, G. P., Jorgl, A., Herrmann, H., Wiche, G. Mechanosensing through focal adhesion-anchored intermediate filaments.
    Trvalý link: http://hdl.handle.net/11104/0244031

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