Abstract:
:Arsenite trioxide (As2O3) induces apoptosis in several cell lines by disturbing key signal transduction pathways through its oxidative properties. Here, we report that As2O3 also induces the phosphorylation of the retinoid receptor RXRalpha, subsequent to oxidative damages and the activation of the stress-activated protein kinases cascade (JNKs). We also report that RA amplifies both As2O3-induced phosphorylation of RXRalpha and apoptosis. Taking advantage of 'rescue' F9 cell lines expressing RXRalpha mutated at its phosphorylation sites, in an RXRalpha null background, we provide evidence that RXRalpha is a key element involved in that potentiating effect. Finally, we demonstrate that As2O3 also abrogates the transactivation of RA-target genes.
journal_name
Oncogenejournal_title
Oncogeneauthors
Tarrade A,Bastien J,Bruck N,Bauer A,Gianni M,Rochette-Egly Cdoi
10.1038/sj.onc.1208402subject
Has Abstractpub_date
2005-03-31 00:00:00pages
2277-88issue
14eissn
0950-9232issn
1476-5594pii
1208402journal_volume
24pub_type
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