Evaluation of an Assay for MGMT Gene Promoter Methylation in Glioblastoma Samples.

Abstract:

BACKGROUND/AIM:To compare the GeneXpert® O6-methylguanine DNA methyltransferase (MGMT) methylation prototype (GX MGMT) assay with pyrosequencing in glioblastomas. MATERIALS AND METHODS:The MGMT methylation status was retrospectively assessed in formalin-fixed paraffin embedded (FFPE) tumor blocks from 262 glioblastoma patients obtained from three independent cohorts using either a standard of care pyrosequencing laboratory developed test or the GX MGMT assay. RESULTS:The concordance rate was 92.1% (58/63) for Oregon Health and Science University (OSHU) samples, 91.7% (88/96) for Medical University of Vienna (MUV) samples, and 82.5% (85/103) for Kepler University Hospital (KUH) samples. Patients with MGMT promoter hypermethylation assessed by pyrosequencing or the GX MGMT test had a significantly longer overall survival compared to patients without hypermethylation (HR=0.43, 95%CI=0.26-0.72, p=0.001 and HR=0.51, 95%CI=0.31-0.84, p=0.008, respectively). CONCLUSION:Standardized, simplified, and on-demand testing of MGMT promoter methylation by the GX MGMT assay is feasible.

journal_name

Anticancer Res

journal_title

Anticancer research

authors

Filipits M,Preusser M,Hainfellner JA,Spiegl-Kreinecker S,Berghoff AS,Lai EW,Kocmond K,Kohlway A,Weidler J,Bates M,Corless C

doi

10.21873/anticanres.14643

subject

Has Abstract

pub_date

2020-11-01 00:00:00

pages

6229-6236

issue

11

eissn

0250-7005

issn

1791-7530

pii

40/11/6229

journal_volume

40

pub_type

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