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Methylation status of the MGMT gene promoter fails to predict the clinical outcome of glioblastoma patients treated with ACNU plus cisplatin

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Authors
Park, Chul-Kee; Park, Sung-Hye; Lee, Se-Hoon; Kim, Chae-Yong; Kim, Dong-Wan; Paek, Sun Ha; Kim, Dong Gyu; Heo, Dae Seog; Kim, Il Han; Jung, Hee-Won
Issue Date
2008
Publisher
Wiley-Blackwell
Citation
Neuropathol
Keywords
glioblastoma; O6-methylguanine-DNAmethyltransferase; survival.
Abstract
We analyzed the methylation status of the O6-methylguanine-DNA methyltransferase (MGMT) promoter using a methylation-specific polymerase chain reaction (MSP) in glioblastoma patients treated with 1-(4-amino-2-methyl-5-pyrimidinyl)methyl-3-(2-chloroethyl)-3-nitrosourea (ACNU) plus cisplatin followed by radiation therapy. Forty-eight patients with interpretable MSP results were included in this study. The MGMT promoter was methylated in 26 patients (54.2%, methylated group) and unmethylated in 22 patients (45.8%, unmethylated group). Comparison of clinical outcomes between the two groups revealed that the methylation status of the MGMT gene promoter was not a prognostic factor for overall survival (P = 0.516) or a predictive factor for radiological response to ACNU plus cisplatin treatment (P = 0.529). The most noteworthy explanation for the result is that the synergistic antitumor effects of ACNU and cisplatin resulting from inactivation of MGMT by cisplatin in MGMT active tumors offset the drug resistance.
ISSN
0919-6544 (print)1440-1789 (online)
Language
English
URI
http://hdl.handle.net/10371/3697
DOI
https://doi.org/10.1111/j.1440-1789.2008.00998.x
https://doi.org/10.1111/j.1440-1789.2008.00998.x
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College of Medicine/School of Medicine (의과대학/대학원)Pathology (병리학전공)Journal Papers (저널논문_병리학전공)
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