Effect of O6‑methylguanine‑DNA methyltransferase methylation in medulloblastoma

  • Authors:
    • Tomoko Kurimoto
    • Akihide Kondo
    • Ikuko Ogino
    • Junya Fujimura
    • Atsushi Arakawa
    • Hajime Arai
    • Toshiaki Shimizu
  • View Affiliations

  • Published online on: September 29, 2017     https://doi.org/10.3892/mco.2017.1431
  • Pages:1107-1111
0

Abstract

Medulloblastoma is a highly malignant brain tumor that predominately affects children and requires multimodal treatment, including chemotherapy with alkylating agents. O6‑methylguanine‑DNA methyltransferase (MGMT) is a DNA repair enzyme that plays an important role in tumor resistance to alkylating agents. Recent studies demonstrated that MGMT promoter methylation suppresses the expression of MGMT and is associated with favorable outcomes of malignant glioma patients. However, the MGMT methylation status and its prognostic impact on medulloblastoma have not been fully elucidated to date. The objective of the present study was to investigate the association between MGMT status and clinical outcomes of pediatric medulloblastoma patients. The records of 15 patients with medulloblastoma treated at our institution were reviewed, and the methylation status of 18 CpG sites in the MGMT promoter region was determined using bisulfite sequencing analysis. A larger number of methylated CpG sites was identified in 9 patients with complete remission (median, 5 sites; range, 2‑9 sites) compared with that in 6 patients with relapse (median, 2 sites, range, 1‑4 sites; P=0.041). These results suggest that a higher number of methylated CpG sites in the MGMT promoter region are associated with a favorable outcome of medulloblastoma.

Related Articles

Journal Cover

December 2017
Volume 7 Issue 6

Print ISSN: 2049-9450
Online ISSN:2049-9469

Sign up for eToc alerts

Recommend to Library

Copy and paste a formatted citation
APA
Kurimoto, T., Kondo, A., Ogino, I., Fujimura, J., Arakawa, A., Arai, H., & Shimizu, T. (2017). Effect of O6‑methylguanine‑DNA methyltransferase methylation in medulloblastoma. Molecular and Clinical Oncology, 7, 1107-1111. https://doi.org/10.3892/mco.2017.1431
MLA
Kurimoto, T., Kondo, A., Ogino, I., Fujimura, J., Arakawa, A., Arai, H., Shimizu, T."Effect of O6‑methylguanine‑DNA methyltransferase methylation in medulloblastoma". Molecular and Clinical Oncology 7.6 (2017): 1107-1111.
Chicago
Kurimoto, T., Kondo, A., Ogino, I., Fujimura, J., Arakawa, A., Arai, H., Shimizu, T."Effect of O6‑methylguanine‑DNA methyltransferase methylation in medulloblastoma". Molecular and Clinical Oncology 7, no. 6 (2017): 1107-1111. https://doi.org/10.3892/mco.2017.1431