High-Grade Glioma Formation Results from Postnatal Pten Loss or Mutant Epidermal Growth Factor Receptor Expression in a Transgenic Mouse Glioma Model

Abstract
High-grade gliomas are devastating brain tumors associated with a mean survival of Pten inactivation in RasB8 mice potentiate high-grade glioma development. Moreover, we observe a concordant loss of Pten and EGFR overexpression in nearly all high-grade gliomas induced by either EGFRvIII introduction or Pten inactivation. This novel preclinical model of high-grade glioma will be useful in evaluating brain tumor therapies targeted to the pathways specifically dysregulated by EGFR expression or Pten loss. (Cancer Res 2006; 66(15): 7429-37)