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Olfactory neuroblastoma mimics molecular subtypes and lineage trajectories of small cell lung cancer

ABSTRACT: Olfactory neuroblastoma mimics molecular subtypes and lineage trajectories of small cell lung cancer

PROVIDER: PRJNA1021254 | ENA |

REPOSITORIES: ENA

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Olfactory neuroblastoma mimics molecular subtypes and lineage trajectories of small cell lung cancer [Single nucleus RNA-seq on human ONB tumor]

Project description:The olfactory epithelium relies on active neuron regeneration from basal stem cells and is susceptible to olfactory neuroblastoma (ONB), a rare, aggressive tumor of unclear origins. Here, we establish a new, highly-penetrant, genetically-engineered mouse model of ONB with alterations in Rb1/Trp53/Myc that exhibit a NEUROD1+ immature neuronal state. ASCL1 loss leads to emergence of non-neuronal histopathologies, including a POU2F3+ microvillar-like state. We find ONB tumor heterogeneity to recapitulate developmental states of multipotent globose basal cells (GBCs), which our data demonstrate is a cell of origin for ONB. Similar to small cell lung cancer (SCLC), mouse and human ONB exhibit: mutually exclusive ASCL1, NEUROD1, and POU2F3- like states, an immune-cold tumor microenvironment, intratumoral subtype heterogeneity comprising neuronal and non-neuronal lineages, and subtype plasticity—as evidenced by barcode-based lineage tracing and single-cell transcriptomics. Collectively, our findings highlight conserved developmental trajectories between ONB and SCLC subtypes with significant implications for ONB classification and treatment.

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