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March 25, 2026Cancer Research

Abstract A009: Engineering a novel suite of somatic transgenic murine Egfr-mutant glioblastoma models that recapitulate molecular, immunologic, and functional features of human glioblastoma

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Authors

JBJoshua J. BreunigKGKatie B. GrausamMPMarisa S. Pioso

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Overview

Engineered models exhibit human-like glioblastoma features, suggesting improved therapeutic development pathways.

Key Points

  • The study aims to develop murine glioblastoma models that closely mimic human disease characteristics, enhancing pre-clinical research.
  • Utilized mosaic analysis with dual-recombinase mediated cassette exchange (MADR) and CRISPR-Cas9
  • Developed autochthonous tumor models with mEGFRvIII and loss-of-function mutations
  • Conducted histopathologic analyses and single-cell RNA sequencing for model characterization
  • mEGFRvIII-PC tumors exhibited diffuse, infiltrative lesions similar to patient tumors
  • Demonstrated a tumor immune microenvironment with minimal lymphocyte infiltration and predominant microglia presence
  • Showed resistance to immune checkpoint blockade and T cell cytotoxicity

Cite This Study

Breunig et al. (2026) studied this question.

synapsesocial.com/papers/69c37af0b34aaaeb1a67ce0ehttps://doi.org/10.1158/1538-7445.brain26-a009
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