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Glioblastoma (GBM) recurrence originates from invasive margin cells that escape surgical debulking, but to what extent these cells resemble their bulk counterparts remains unclear. Here, we generated three immunocompetent somatic GBM mouse models, driven by subtype-associated mutations, to compare matched bulk and margin cells. We find that, regardless of mutations, tumors converge on common sets of neural-like cellular states. However, bulk and margin have distinct biology. Injury-like programs associated with immune infiltration dominate in the bulk, leading to the generation of lowly proliferative injured neural progenitor-like cells (iNPCs). iNPCs account for a significant proportion of dormant GBM cells and are induced by interferon signaling within T cell niches. In contrast, developmental-like trajectories are favored within the immune-cold margin microenvironment resulting in differentiation toward invasive astrocyte-like cells. These findings suggest that the regional tumor microenvironment dominantly controls GBM cell fate and biological vulnerabilities identified in the bulk may not extend to the margin residuum.

Original publication

DOI

10.1016/j.celrep.2023.112472

Type

Journal article

Journal

Cell reports

Publication Date

05/2023

Volume

42

Addresses

Samantha Dickson Brain Cancer Unit, UCL Cancer Institute, London WC1E 6DD, UK.

Keywords

Animals, Mice, Glioblastoma, Brain Neoplasms, Cell Differentiation, Neural Stem Cells, Tumor Microenvironment