RAS-MAPK Pathway-Driven Tumor Progression Is Associated with Loss of CIC and Other Genomic Aberrations in Neuroblastoma

Thomas F Eleveld, Linda Schild, Jan Koster, Danny A Zwijnenburg, Lindy K Alles, Marli E Ebus, Richard Volckmann, Godelieve A Tijtgat, Peter van Sluis, Rogier Versteeg, Jan J Molenaar

Onderzoeksoutput: Bijdrage aan tijdschriftArtikelpeer review

Samenvatting

Mutations affecting the RAS-MAPK pathway frequently occur in relapsed neuroblastoma tumors, which suggests that activation of this pathway is associated with a more aggressive phenotype. To explore this hypothesis, we generated several model systems to define a neuroblastoma RAS-MAPK pathway signature. Activation of this pathway in primary tumors indeed correlated with poor survival and was associated with known activating mutations in ALK and other RAS-MAPK pathway genes. Integrative analysis showed that mutations in PHOX2B, CIC, and DMD were also associated with an activated RAS-MAPK pathway. Mutation of PHOX2B and deletion of CIC in neuroblastoma cell lines induced activation of the RAS-MAPK pathway. This activation was independent of phosphorylated ERK in CIC knockout systems. Furthermore, deletion of CIC caused a significant increase in tumor growth in vivo These results show that the RAS-MAPK pathway is involved in tumor progression and establish CIC as a powerful tumor suppressor that functions downstream of this pathway in neuroblastoma.Significance: This work identifies CIC as a powerful tumor suppressor affecting the RAS-MAPK pathway in neuroblastoma and reinforces the importance of mutation-driven activation of this pathway in cancer. Cancer Res; 78(21); 6297-307. ©2018 AACR.

Originele taal-2Engels
Pagina's (van-tot)6297-6307
Aantal pagina's11
TijdschriftCancer research
Volume78
Nummer van het tijdschrift21
DOI's
StatusGepubliceerd - 1 nov. 2018

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