Nov 27, 2019

Stalled developmental programs at the root of pediatric brain tumors

Nature Genetics
Selin JessaClaudia L Kleinman

Abstract

Childhood brain tumors have suspected prenatal origins. To identify vulnerable developmental states, we generated a single-cell transcriptome atlas of >65,000 cells from embryonal pons and forebrain, two major tumor locations. We derived signatures for 191 distinct cell populations and defined the regional cellular diversity and differentiation dynamics. Projection of bulk tumor transcriptomes onto this dataset shows that WNT medulloblastomas match the rhombic lip-derived mossy fiber neuronal lineage and embryonal tumors with multilayered rosettes fully recapitulate a neuronal lineage, while group 2a/b atypical teratoid/rhabdoid tumors may originate outside the neuroectoderm. Importantly, single-cell tumor profiles reveal highly defined cell hierarchies that mirror transcriptional programs of the corresponding normal lineages. Our findings identify impaired differentiation of specific neural progenitors as a common mechanism underlying these pediatric cancers and provide a rational framework for future modeling and therapeutic interventions.

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References

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Citations

Mentioned in this Paper

Embryo
Transcription, Genetic
Neurons
Neoplasms
Mossy Fiber
Neural Stem Cells
Cell Differentiation Process
Medulloblastoma
Embryonal Neoplasm
Brain Neoplasms

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