Cdc42 and Rac1 are necessary for autotaxin-induced tumor cell motility in A2058 melanoma cells
- PMID: 12482591
- DOI: 10.1016/s0014-5793(02)03698-0
Cdc42 and Rac1 are necessary for autotaxin-induced tumor cell motility in A2058 melanoma cells
Abstract
Autotaxin (ATX) is a strong motogen that can increase invasiveness and angiogenesis. In the present study, we investigated the signal transduction mechanism of ATX-induced tumor cell motility. Unlike N19RhoA expressing cells, the cells expressing N17Cdc42 or N17Rac1 showed reduced motility against ATX. ATX activated Cdc42 and Rac1 and increased complex formation between these small G proteins and p21-activated kinase (PAK). Furthermore, ATX phosphorylated focal adhesion kinase (FAK) that was not shown in cells expressing dominant negative mutants of Cdc42 or Rac1. Collectively, these data strongly indicate that Cdc42 and Rac1 are essential for ATX-induced tumor cell motility in A2058 melanoma cells, and that PAK and FAK might be also involved in the process.
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