Targeted inhibition of WIP1 and histone H3K27 demethylase activity synergistically suppresses neuroblastoma growth.

ABSTRACT: High-risk neuroblastoma frequently exhibits segmental gain of chromosome 17q, including the locus of PPM1D, which encodes the phosphatase WIP1, a regulator of p53 activity, DNA repair, and apoptosis. High expression of PPM1D is correlated to poor prognosis, and genetic or pharmacologic inhibition of WIP1 suppresses neuroblastoma growth. Here, we show that combining drugs that target WIP1 and H3K27 demethylation induces synergistic cytotoxicity in neuroblastoma. We screened 527 different compounds together with inhibitors of WIP1 and identified a strong cytotoxic synergism between the WIP1 inhibitor SL-176 and GSK-J4, a specific inhibitor of the H3K27 demethylase JMJD3. Viability assays in neuroblastoma cell lines and treatment of tumor spheroids confirmed the synergistic effect of combinin

SUBMITTER: Treis D 

PROVIDER: S-EPMC12009370 | biostudies-literature | 2025 Apr

REPOSITORIES: biostudies-literature