Tumor suppressor WWOX binds to ΔNp63α and sensitizes cancer cells to chemotherapy.

Abstract:

:The WWOX tumor suppressor is a WW domain-containing protein. Its function in the cell has been shown to be mediated, in part, by interacting with its partners through its first WW (WW1) domain. Here, we demonstrated that WWOX via WW1 domain interacts with p53 homolog, ΔNp63α. This protein-protein interaction stabilizes ΔNp63α, through antagonizing function of the E3 ubiquitin ligase ITCH, inhibits nuclear translocation of ΔNp63α into the nucleus and suppresses ΔNp63α transactivation function. Additionally, we found that this functional crosstalk reverses cancer cells resistance to cisplatin, mediated by ΔNp63α, and consequently renders these cells more sensitive to undergo apoptosis. These findings suggest a functional crosstalk between WWOX and ΔNp63α in tumorigenesis.

journal_name

Cell Death Dis

journal_title

Cell death & disease

authors

Salah Z,Bar-mag T,Kohn Y,Pichiorri F,Palumbo T,Melino G,Aqeilan RI

doi

10.1038/cddis.2013.6

subject

Has Abstract

pub_date

2013-01-31 00:00:00

pages

e480

issn

2041-4889

pii

cddis20136

journal_volume

4

pub_type

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