Jab1 has negative effects on p53-mediated genotoxic stresses

Eun-Woo Lee, Sang-Sik Lee, Jae-Whan Song
2009 BMB Reports  
In this study, we use promoter analysis to show that interaction between Jab1 and p53 induces suppression of p53 activation in U2OS and H1299 cells. Interaction between p53 and Jab1 was further confirmed by immunoprecipitation and immunofluorescent analyses. In particular, Jab1 was able to induce nuclear export of p53 as previously reported. When Jab1 was overexpressed in U2OS cells followed by etoposide or hydrogen peroxide (H2O2), cell death induced by such stresses was protected against. On
more » ... tected against. On the contrary, when the level of Jab1 was suppressed in U2OS cells, cytotoxicity imposed by etoposide and H2O2 was dramatically increased, suggesting a cell protective role for Jab1. These results indicate that Jab1 is a negative regulator of p53 and a plausible oncogene. [BMB reports 2009; 42(5): 299-303]
doi:10.5483/bmbrep.2009.42.5.299 pmid:19470245 fatcat:wdwnvoxg4beerlrw7r7knflwym