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  • Title: Cortactin is required for integrin-mediated cell spreading.
    Author: Illés A, Enyedi B, Tamás P, Balázs A, Bogel G, Melinda, Lukács, Buday L.
    Journal: Immunol Lett; 2006 Apr 15; 104(1-2):124-30. PubMed ID: 16364453.
    Abstract:
    Cortactin is an SH3 domain-containing protein that contributes to the formation of dynamic cortical actin-associated structures, such as lamellipodia and membrane ruffles. Here we show that expression of either the GFP-tagged N-terminal or the C-teminal halves of cortactin inhibits significantly the spreading of COS7 cells on fibronectin. Introducing inactivating point mutation into the SH3 domain of the C-terminal half of cortactin suspends the dominant negative effect of the construct. In addition, a vector-based RNA interference was used to knock-down endogenous level of cortactin in cells. We demonstrate that cortactin deficient cells were not able to spread. These results suggest that cortactin is required for integrin-mediated signalling pathways.
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