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Updated: Apr 25, 2026
Transposon Mediated Integration of Plasmid DNA into the Subventricular Zone of Neonatal Mice to Generate Novel Models of Glioblastoma
Published on: February 22, 2015
Most human non-GCIMP glioblastoma subtypes evolve from a common proneural-like precursor glioma
Tatsuya Ozawa1, Markus Riester2, Yu-Kang Cheng2
1Division of Human Biology and Solid Tumor Translational Research, Fred Hutchinson Cancer Research Center, Department of Neurosurgery and Alvord Brain Tumor Center, University of Washington, Seattle, WA 98109, USA.
Abstract:
To understand the relationships between the non-GCIMP glioblastoma (GBM) subgroups, we performed mathematical modeling to predict the temporal sequence of driver events during tumorigenesis. The most common order of evolutionary events is 1) chromosome (chr) 7 gain and chr10 loss, followed by 2) CDKN2A loss and/or TP53 mutation, and 3) alterations canonical for specific subtypes. We then developed a computational methodology to identify drivers of broad copy number changes, identifying PDGFA (chr7) and PTEN (chr10) as driving initial nondisjunction events. These predictions were validated using mouse modeling, showing that PDGFA is sufficient to induce proneural-like gliomas and that additional NF1 loss converts proneural to the mesenchymal subtype. Our findings suggest that most non-GCIMP mesenchymal GBMs arise as, and evolve from, a proneural-like precursor.
