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Spatiotemporally-regulated interaction between β1 integrin and ErbB4 that is involved in fibronectin-dependent cell migration

Authors: Yoshihito Ishiura; Shigeki Higashiyama; Ryusuke Yamashita; Norihiro Kotani; Koichi Honke;

Spatiotemporally-regulated interaction between β1 integrin and ErbB4 that is involved in fibronectin-dependent cell migration

Abstract

Integrins are widely expressed cell surface molecules that mediate cell attachment to extracellular matrix (ECM) proteins. They also interact with molecules on their own membranes, and these cis-interactions play a crucial role in integrin-dependent cellular responses. We herein analysed what molecules interact with β1 integrin during biological events induced by cell attachment to different ECM proteins, using a recently established reaction, the enzyme-mediated activation of radical sources (EMARS). The interactions between β1 integrin and receptor tyrosine kinases including EGFR and ErbB4 reached a peak at 2 h after seeding HeLa S3 cells onto the ECM proteins. The peak of phosphorylation of ErbB4 (at 2 h after seeding the cells onto fibronectin) coincided with the peak of the interaction with β1 integrin, while that of EGFR (at 1 day) did not. Accompanying with these findings, suppression of cell migration by a pharmacological inhibitor of the ErbB family receptors, PD168393 and an anti-ErbB4 neutralizing antibody, 12D8 was observed at 2 h after seeding. Taken together, it is deduced that interactions between β1 integrin and ErbB4 occur in a spatiotemporally-regulated manner, and such interaction contributes to the integrin-dependent cell migration.

Keywords

Microscopy, Confocal, Receptor, ErbB-4, Integrin beta1, Electrophoretic Mobility Shift Assay, Flow Cytometry, Fibronectins, ErbB Receptors, Cell Movement, Cell Line, Tumor, Cell Adhesion, Humans, Phosphorylation, Protein Binding

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citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
33
Top 10%
Top 10%
Top 10%
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