Tumor suppressor WWOX binds to DNp63a and sensitizes cancer cells to chemotherapy
Date
2013-01-31
Authors
Salah, Z.
Bar-mag, T.
Kohn, Y.
Pichiorri, F.
Palumbo, T.
Melino, G.
Aqeilan, RI
Journal Title
Journal ISSN
Volume Title
Publisher
Springer Nature
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 firstWW(WW1) domain. Here, we demonstrated that WWOX viaWW1 domain interacts
with p53 homolog, DNp63a. This protein–protein interaction stabilizes DNp63a, through antagonizing function of the E3 ubiquitin
ligase ITCH, inhibits nuclear translocation of DNp63a into the nucleus and suppresses DNp63a transactivation function.
Additionally, we found that this functional crosstalk reverses cancer cells resistance to cisplatin, mediated by DNp63a, and
consequently renders these cells more sensitive to undergo apoptosis. These findings suggest a functional crosstalk between
WWOX and DNp63a in tumorigenesis.
Description
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Citation
Cell Death and Disease (2013) 4, e480; doi:10.1038/cddis.2013.6 & 2013 Macmillan Publishers Limited All rights reserved 2041-4889/13