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Updated: Jul 22, 2026
Primary Orthotopic Glioma Xenografts Recapitulate Infiltrative Growth and Isocitrate Dehydrogenase I Mutation
Published on: January 14, 2014
H3.3 G34R-engineered murine glioma reproduces diffuse perineuronal infiltration of diffuse hemispheric glioma, H3
Takafumi Okubo1, Masafumi Miyai2, Hiroyuki Tomita3
1Department of Tumor Pathology, Gifu University Graduate School of Medicine, Gifu, Japan.
Background:
Diffuse hemispheric glioma, H3 G34-mutant (DHG-H3G34), is an aggressive pediatric brain tumor characterized by a distinctive neurotropic invasion pattern, including prominent perineuronal satellitosis (PS). The molecular mechanisms underlying this phenotype remain unclear owing to the scarcity of faithful preclinical models.
Methods:
A murine glioma model was generated by introducing the H3.3 G34R mutation into SV40-immortalized glial cells (IG34). Transcriptomic profiling was used for molecular characterization, and in vivo behavior was assessed following orthotopic implantation into immunodeficient mice.
Results:
IG34 cells exhibited stable expression of the H3.3 G34R oncohistone. Transcriptomic analysis revealed upregulation of interferon-response genes and positive normalized enrichment scores across multiple oncogenic signatures, with a subset reaching statistical significance (FDR <0.25). In vivo, IG34 cells formed diffusely infiltrative tumors. PS was significantly increased compared with controls, whereas perivascular satellitosis did not differ significantly, thus recapitulating the selective neurotropic invasion characteristic of DHG-H3G34.
Conclusions:
Our H3.3 G34R-engineered murine model successfully reproduces the defining neurotropic features of human DHG-H3G34, particularly PS. This pathologically relevant model provides a valuable platform for investigating the molecular basis of glioma invasion and for guiding the development of therapeutic strategies.
