Journal
JOURNAL OF CELLULAR BIOCHEMISTRY
Volume 103, Issue 3, Pages 986-993Publisher
WILEY
DOI: 10.1002/jcb.21469
Keywords
JNK; EFGR; uPA; invasiveness
Categories
Ask authors/readers for more resources
In this study, we demonstrated that tyrosine phosphorylation of EGFR and the autocrine expression of uPA and HB-EGF depend on the activity of c-jun amino-terminal kinase (JNK) in human prostatic DU-145 cells. These cells overexpress EGFR and produce a high amount of uPA. Treatment with either SP600125, a specific chemical inhibitor of JNK, or the expression of a dominant-negative JNK form inhibited autocrine production of uPA and HB-EGF, which block EGFR phosphorylation and mitigates invasive capacity. Our data provided evidence that in DU-145 cells, the maintenance of the activation level of EGFR, which determines the cellular invasive potential, operates through an autocrine loop involving the JNK-dependent production of uPA and HB-EGF activity. Moreover, we found that exogenously added uPA stimulates autocrine production of HB-EGF, and that blocking HB-EGF activity curbed DU-145 cell invasive potential.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available