Midkine promotes tetraspanin–integrin interaction and induces FAK-Stat1α pathway contributing to migration/invasiveness of human head and neck squamous cell carcinoma cells

The heparin-binding growth factor, MK, promoting tumorigenesis and survival was found to associate with α6β1 integrins. We showed for the first time that MK interacted with TSPAN1 and facilitated the association between TSPAN1 and integrin α6β1 proteins in head and neck squamous cell carcinoma (HNSC...

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Published in:Biochemical and biophysical research communications 2008-12, Vol.377 (2), p.474-478
Main Authors: Huang, Yiping, Sook-Kim, Myoung, Ratovitski, Edward
Format: Article
Language:English
Subjects:
Adhesion
Cell migration
Integrin
Invasiveness
Midkine
Signaling
Squamous carcinomas
Tetraspanin
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description The heparin-binding growth factor, MK, promoting tumorigenesis and survival was found to associate with α6β1 integrins. We showed for the first time that MK interacted with TSPAN1 and facilitated the association between TSPAN1 and integrin α6β1 proteins in head and neck squamous cell carcinoma (HNSCC) cells. We found that MK mediated an integrin-dependent tyrosine phosphorylation of FAK and activation of paxillin and Stat1α pathways. As result, downstream target genes implicated in cell migration and invasiveness (e.g. MMP-2 and MMP-26) were overexpressed. We observed that RNAi silencing of the critical signaling intermediates led to decrease of MK-induced migration/invasiveness of HNSCC cells. The major finding of this study is a novel MK-triggered signaling mechanism implicated in migration and invasiveness of HNSCC cells.
doi_str_mv 10.1016/j.bbrc.2008.09.138
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subjects Adhesion
Cell migration
Integrin
Invasiveness
Midkine
Signaling
Squamous carcinomas
Tetraspanin
title Midkine promotes tetraspanin–integrin interaction and induces FAK-Stat1α pathway contributing to migration/invasiveness of human head and neck squamous cell carcinoma cells
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