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Ref Type

Journal Article

PMID

(20560678)

Authors

Bujko M, Kober P, Matyja E, Nauman P, Dyttus-Cebulok K, Czeremszyńska B, Bonicki W, Siedlecki JA

Title

Prognostic value of IDH1 mutations identified with PCR-RFLP assay in glioblastoma patients.

Journal	Vol	Issue	Date	Pages	Journal Short Title
Molecular diagnosis & therapy	14	3	2010 Jun 01	163-9	Mol Diagn Ther

URL

Abstract Text

It has been shown that somatic missense mutations in codon 132 of the NADP+ dependent isocitrate dehydrogenase 1 (IDH1) gene occur frequently in primary brain tumors including highly malignant glioblastoma (GBM). The aim of this study was to evaluate a PCR-restriction fragment length polymorphism (RFLP)-based method for missense mutation detection and to estimate the prognostic value of the two most frequent IDH1 codon 132 mutations, R132H and R132C, in patients with newly diagnosed GBM treated with radiation combined with temozolomide.DNA was extracted from formalin-fixed, paraffin-embedded tissue. The PCR-RFLP method was adapted to IDH1 codon 132 mutation screening. The mutation status was determined in a group of 58 patients.We found R132H mutations in 14% of patients. No R132C mutation was found in this study. Median follow-up for living patients was 31 (range 17-51) months. Median progression-free survival in the group of patients with IDH1 mutation was 29 months compared with 10 months in the IDH1 wild-type group (p = 0.004; hazard ratio [HR] 3.09, 95% CI 1.25, 4.78). Median overall survival in the group with IDH1 mutation has not been reached, whereas in the group with wild-type IDH1 it was 19.5 months (p < 0.001; HR 4.76, 95% CI 1.22, 6.30). Three-year overall survival was 60% in the group with IDH1 mutation while in the wild-type IDH1 group it dropped to 29%. IDH1 mutations significantly correlated with younger age (p = 0.02).Our results indicate that the IDH1 R132H mutation is a powerful prognostic marker in GBM treated with chemoradiation. The PCR-RFLP method allows for a fast, inexpensive, and sensitive mutation screening.

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Molecular Profile	Treatment Approach

Gene Name	Source	Synonyms	Protein Domains	Gene Description	Gene Role

Therapy Name	Drugs	Efficacy Evidence	Clinical Trials

Drug Name	Trade Name	Synonyms	Drug Classes	Drug Description

Gene	Variant	Impact	Protein Effect	Variant Description	Associated with drug Resistance

Molecular Profile	Indication/Tumor Type	Response Type	Therapy Name	Approval Status	Evidence Type	Efficacy Evidence	References
IDH1 mutant	glioblastoma	not applicable	N/A	Clinical Study	Prognostic	In multiple clinical studies, including two meta-analyses, IDH1 mutations were associated with a greater overall survival and progression-free survival in patients with glioblastoma (PMID: 23904262, PMID: 26945349, PMID: 20560678).	20560678 23904262 26945349