4.7 Article

Interference with actin dynamics is superior to disturbance of microtubule function in the inhibition of human ovarian cancer cell motility

Journal

BIOCHEMICAL PHARMACOLOGY
Volume 76, Issue 6, Pages 707-716

Publisher

PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.bcp.2008.06.014

Keywords

ovarian cancer; cytoskeleton; motility; microtubule-targeting agents; F-actin

Funding

  1. The Netherlands Heart Foundation [2003T032]

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Cellular movement is mainly orchestrated by the actin and microtubule cytoskeleton in which Rho GTPases closely collaborate. We studied whether cytoskeleton-interfering agents at subtoxic and 50% growth-inhibiting concentrations affect motility of five unselected human ovarian cancer cell lines. Cisplatin and doxorubicin as control cytotoxic agents were not effective, the microtubule-targeting agents docetaxel, epothilone B and vinblastine only marginally inhibited cell motility, while the actin-targeting agent cytochalasin D was most potent in hampering both cell migration and invasion. Disturbance of microtubule dynamics by docetaxel did not importantly affect the cellular structures of beta-tubulin and F-actin. In contrast, hindrance of actin dynamics by cytochalasin D resulted in loss of lamellipodial extensions, induced thick layers of F-actin and disorder in cellular organization. In OVCAR-3 cells the activity of Rac1 was only slightly diminished by docetaxel, but clearly reduced by cytochalasin D. in conclusion, targeting the actin cytoskeleton might provide a means to prevent metastasis formation. (C) 2008 Elsevier Inc. All rights reserved.

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