Abstract:
:Exposure of mesangial cells to ionic Cd(2+) induces the proto-oncogene c-fos, while activating both Erk and stress-activated protein kinase (SAPK) MAP kinase pathways. While we have previously used a pharmacological inhibitor of Erk activation to implicate involvement of this pathway in the induction of c-fos by Cd(2+), the consequences of SAPK activation remained unknown. Here we use dominant negative inhibitors of the SAPK kinases, SEK1 and MKK7, to show that Cd(2+) activates SAPK through MKK7, but that partial inhibition of SAPK alone is insufficient to significantly affect the magnitude of the Cd(2+)-dependent increase in c-fos mRNA. However, inhibition of Erk and SAPK pathways together abrogates the increase, suggesting that these pathways act in concert in the induction of c-fos by this toxic metal.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Ding W,Templeton DMdoi
10.1006/bbrc.2000.3009subject
Has Abstractpub_date
2000-07-05 00:00:00pages
718-22issue
2eissn
0006-291Xissn
1090-2104pii
S0006-291X(00)93009-2journal_volume
273pub_type
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