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. 2012 Jun;33(2):95-106.
doi: 10.1007/s10974-012-9287-8. Epub 2012 Mar 11.

Impact of the carbazole derivative wiskostatin on mechanical stability and dynamics of motile cells

Eva K B Pfannes  1 , Matthias Theves, Christian Wegner, Carsten Beta
Affiliations

Impact of the carbazole derivative wiskostatin on mechanical stability and dynamics of motile cells

Eva K B Pfannes et al. J Muscle Res Cell Motil. 2012 Jun.

Abstract

Many essential functions in eukaryotic cells like phagocytosis, division, and motility rely on the dynamical properties of the actin cytoskeleton. A central player in the actin system is the Arp2/3 complex. Its activity is controlled by members of the WASP (Wiskott-Aldrich syndrome protein) family. In this work, we investigated the effect of the carbazole derivative wiskostatin, a recently identified N-WASP inhibitor, on actin-driven processes in motile cells of the social ameba Dictyostelium discoideum. Drug-treated cells exhibited an altered morphology and strongly reduced pseudopod formation. However, TIRF microscopy images revealed that the overall cortical network structure remained intact. We probed the mechanical stability of wiskostatin-treated cells using a microfluidic device. While the total amount of F-actin in the cells remained constant, their stiffness was strongly reduced. Furthermore, wiskostatin treatment enhanced the resistance to fluid shear stress, while spontaneous motility as well as chemotactic motion in gradients of cAMP were reduced. Our results suggest that wiskostatin affects the mechanical integrity of the actin cortex so that its rigidity is reduced and actin-driven force generation is impaired.

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References

    1. Proc Natl Acad Sci U S A. 2004 Mar 30;101(13):4379-83 - PubMed
    1. Nat Rev Mol Cell Biol. 2006 Oct;7(10):713-26 - PubMed
    1. BMC Cell Biol. 2008 Jul 30;9:42 - PubMed
    1. Am J Physiol Cell Physiol. 2007 Apr;292(4):C1562-6 - PubMed
    1. Mol Biol Cell. 2010 Aug 15;21(16):2880-93 - PubMed

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