Isocitrate Dehydrogenase 1 Codon 132 Mutation Is an Important Prognostic Biomarker in Gliomas

PURPOSE: Unexpected mutations affecting the isocitrate dehydrogenase (IDH1) gene at codon 132 have been found in 12% of glioblastomas. PATIENTS AND METHODS: IDH1 codon 132 sequencing was performed in a series of 404 patients with glioma (100 grade 2, 121 grade 3, and 183 grade 4 gliomas) and correlated with histology, genomic profile, methylguanyl methyltransferase (MGMT) promoter methylation status, and outcome. RESULTS: A total of 155 codon 132 mutations were found, of which 131 were Arg132His (88.5%). The IDH1 mutation was inversely correlated with grade, affecting 77% of grade 2, 55% of grade 3, and 6% of grade 4 gliomas (P

• IN
  Institut National Du Cancer

  Award: PL 046