Abstract:
:The small heat shock protein hsp27 is associated with aggressive tumor behavior in certain subsets of breast cancer patients. Previously we demonstrated that hsp27 overexpression in breast cancer cells increased in vitro and in vivo invasiveness, suggesting that hsp27 influences the metastatic process. To investigate this role for hsp27, we have utilized MDA-MB-231 breast cancer cells that overexpress hsp27 and cDNA expression array technology. We demonstrate that hsp27 overexpression up-regulates MMP-9 expression and activity and down-regulates Yes expression. Furthermore, our results suggest that Yes may be involved in regulating MMP-9 expression, as well as in vitro invasion. Reconstitution of Yes expression by transfection into hsp27-overexpressing cells decreased MMP-9 expression, and increased in vitro invasiveness, abrogating the phenotype conferred by hsp27 overexpression. Therefore, our results provide a new potential mechanism by which hsp27 affects the metastatic cascade-through regulation of MMP-9 and Yes expression.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Hansen RK,Parra I,Hilsenbeck SG,Himelstein B,Fuqua SAdoi
10.1006/bbrc.2001.4548subject
Has Abstractpub_date
2001-03-23 00:00:00pages
186-93issue
1eissn
0006-291Xissn
1090-2104pii
S0006-291X(01)94548-6journal_volume
282pub_type
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