Document Detail

The catalytic class I(A) PI3K isoforms play divergent roles in breast cancer cell migration.
MedLine Citation:
PMID:  21056654     Owner:  NLM     Status:  In-Process    
Transforming growth factor-β (TGFβ) plays an important role in breast cancer metastasis. Here phosphoinositide 3-kinase (PI3K) signalling was found to play an essential role in the enhanced migration capability of fibroblastoid cells (FibRas) derived from normal mammary epithelial cells (EpH4) by transduction of oncogenic Ras (EpRas) and TGFβ1. While expression of the PI3K isoform p110δ was down-regulated in FibRas cells, there was an increase in the expression of p110α and p110β in the fibroblastoid cells. The PI3K isoform p110β was found to specifically contribute to cell migration in FibRas cells, while p110α contributed to the response in EpH4, EpRas and FibRas cells. Akt, a downstream targets of PI3K signalling, had an inhibitory role in the migration of transformed breast cancer cells, while Rac, Cdc42 and the ribosomal protein S6 kinase (S6K) were necessary for the response. Together our data reveal a novel specific function of the PI3K isoform p110β in the migration of cells transformed by oncogenic H-Ras and TGF-β1.
Angela De Laurentiis; Olivier E Pardo; Andrea Palamidessi; Shaun P Jackson; Simone M Schoenwaelder; Ernst Reichmann; Giorgio Scita; Alexandre Arcaro
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2010-11-05
Journal Detail:
Title:  Cellular signalling     Volume:  23     ISSN:  1873-3913     ISO Abbreviation:  Cell. Signal.     Publication Date:  2011 Mar 
Date Detail:
Created Date:  2010-12-27     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8904683     Medline TA:  Cell Signal     Country:  England    
Other Details:
Languages:  eng     Pagination:  529-41     Citation Subset:  IM    
Copyright Information:
Copyright © 2010 Elsevier Inc. All rights reserved.
Division of Clinical Chemistry and Biochemistry, University Children's Hospital Zurich, 8032 Zurich, Switzerland.
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