Journal
ISCIENCE
Volume 24, Issue 4, Pages -Publisher
CELL PRESS
DOI: 10.1016/j.isci.2021.102321
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Funding
- Novo Nordisk Foundation [NNF14CC0001]
- Novo Nordisk Foundation Copenhagen Bioscience PhD Programme grant [NNF16CC0020906]
- long-term EMBO fellowship [ALTF 746-2009]
- Wellcome Trust [8107636/Z/15/Z]
- Danish National Research Foundation (DNRF) [141]
- NovoNordisk Foundation [NNF18OC0052768]
- Danish Council for Technology and Production Sciences [DFF -8022-00051]
- European Union [MSmed-686547, EPIC-XS-823839, 259348ASSET]
- ERC synergy grant [810057-HighResCells]
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This study investigated the roles of E3 ubiquitin ligases Cbl and Cbl-b in regulating signaling responses associated with neuroblastoma cell differentiation. By using mass spectrometry-based proteomics, the study identified SHP-2 and CDK16 as key regulators of extracellular signal-regulated kinase phosphorylation and neurite outgrowth in neuroblastoma, highlighting their involvement in the differentiation process.
Neuroblastoma is a highly heterogeneous embryonal solid tumor of the sympathetic nervous system. As some tumors can be treated to undergo differentiation, investigating this process can guide differentiation-based therapies of neuroblastoma. Here, we studied the role of E3 ubiquitin ligases Cbl and Cbl-b in regulation of long-term signaling responses associated with extracellular signal-regulated kinase phosphorylation and neurite outgrowth, a morphological marker of neuroblastoma cell differentiation. Using quantitative mass spectrometry (MS)-based proteomics, we analyzed how the neuroblastoma cell line proteome, phosphoproteome, and ubiquitylome were affected by Cbl and Cbl-b depletion. To quantitatively assess neurite outgrowth, we developed a high-throughput microscopy assay that was applied in combination with inhibitor studies to pinpoint signaling underlying neurite outgrowth and to functionally validate proteins identified in the MS data sets. Using this combined approach, we identified a role for SHP-2 and CDK16 in Cbl/Cbl-b-dependent regulation of extracellular signal-regulated kinase phosphorylation and neurite outgrowth, highlighting their involvement in neuroblastoma cell differentiation.
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