p27Kip1 promotes invadopodia turnover and invasion through the regulation of the PAK1/Cortactin pathway
- INSERM, France
- National Institute of Radiological Sciences, Japan
- French Institute of Health and Medical Research, France
Abstract
p27Kip1 (p27) is a cyclin-CDK inhibitor and negative regulator of cell proliferation. p27 also controls other cellular processes including migration and cytoplasmic p27 can act as an oncogene. Furthermore, cytoplasmic p27 promotes invasion and metastasis, in part by promoting epithelial to mesenchymal transition. Herein, we find that p27 promotes cell invasion by binding to and regulating the activity of Cortactin, a critical regulator of invadopodia formation. p27 localizes to invadopodia and limits their number and activity. p27 promotes the interaction of Cortactin with PAK1. In turn, PAK1 promotes invadopodia turnover by phosphorylating Cortactin, and expression of Cortactin mutants for PAK-targeted sites abolishes p27's effect on invadopodia dynamics. Thus, in absence of p27, cells exhibit increased invadopodia stability due to impaired PAK1-Cortactin interaction, but their invasive capacity is reduced compared to wild-type cells. Overall, we find that p27 directly promotes cell invasion by facilitating invadopodia turnover via the Rac1/PAK1/Cortactin pathway.
Article and author information
Author details
Funding
Ligue Nationale Contre le Cancer
- Renaud T Perchey
- Stéphane Manenti
- Arnaud Besson
Ministere de l'enseignement superieur et de la recherche
- Pauline Jeannot
- Ada Nowosad
INSERM
- Evangeline Bennana
- Patrick Mayeux
- François Guillonneau
- Stéphane Manenti
- Arnaud Besson
CNRS
- Stéphane Manenti
- Arnaud Besson
The funders had no role in study design, data collection and interpretation, or the decision to submit the work for publication.
Copyright
© 2017, Jeannot et al.
This article is distributed under the terms of the Creative Commons Attribution License permitting unrestricted use and redistribution provided that the original author and source are credited.
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p27Kip1 promotes invadopodia turnover and invasion through the regulation of the PAK1/Cortactin pathway
eLife 6:e22207.
https://doi.org/10.7554/eLife.22207
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