Inclusion of JNK-independent drugs within multiagent chemotherapy improves response in relapsed high-risk neuroblastoma
- Jeremy Z. R. Han
- Monica Phimmachanh
- Jordan F. Hastings
- King Ho Leong
- Boaz H. Ng
- Jenny Ni
- Angela Fontaine-Titley
- Antonia L. Cadell
- Yolande EI O’Donnell
- Misaki Clearwater
- Alvin Kamili
- Michelle Haber
- Murray Norris
- Paul Timpson
- Toby N. Trahair
- Jamie I. Fletcher
- Dirk Fey
- Walter Kolch
- Sharissa L. Latham
- David R. Croucher
2025-11-28
The acquisition of a chemoresistant state underlies poor prognosis in many cancers, including neuroblastoma. We previously demonstrated that heterogeneity in apoptosis induction through c-Jun amino-terminal kinase (JNK) promotes a form of nongenetic chemoresistance in neuroblastoma observable at both patient and single-cell levels. As the maintenance of this JNK-impaired state in the relapse setting is a substantial barrier to the efficacy of many standard-of-care chemotherapy drugs, we combined a mechanistic, mathematical model of JNK activation with a pediatric-focused drug screen and identified approved oncology drugs capable of inducing apoptosis in a JNK-independent manner. Functional genomics further revealed that synergy between these JNK-independent drugs and standard-of-care chemotherapies emerged from differential utilization of apoptotic network components, rather than from their direct mechanistic targets. Efficacy studies with patient-derived xenograft models also confirmed that including a JNK-independent drug within existing chemotherapy backbones significantly improved response in the relapse setting, where new approaches are urgently needed.