Jung HJ, Kim HL, Seo YR. Enhanced
redox factor 1 (REF1)-modulated p53 stabilization and JNK1 dissociation in response to selenomethionine.
Anticancer Res 2013;
33:3645-3651. [PMID:
24023291]
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Abstract
AIM
p53 is reportedly activated without any genotoxicity through redox modulation of redox factor 1 (REF1). REF1 is documented to modulate the redox status under selenomethionine (SeMet). In this study, we investigated the mechanism of p53 stabilization by SeMet.
MATERIALS AND METHODS
We mainly used ubiquitination assay and immunoprecipitation to determine the potential role of REF1 and c-jun N-terminal kinase 1 (JNK) in modulation of p53 stabilization by SeMet.
RESULTS
The amount of ubiquitinated p53 decreased significantly under SeMet treatment, suggesting that SeMet might inhibit the proteasome-dependent degradation of p53. In addition, we observed that JNK was considerably associated with p53 in REF1 siRNA-treated cells, implying a possible role for SeMet-induced REF1 activity in modulation of the interaction between JNK and p53 via changes in p53 redox status.
CONCLUSION
Our results suggest that the alternate mechanism of p53 stabilization by SeMet might provide an important clue in elucidating the molecular mechanism of chemopreventative compounds against various oxidative stresses.
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