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Correlation between O6-methylguanine-DNA methyltransferase and survival in elderly patients with glioblastoma treated with radiotherapy plus concomitant and adjuvant temozolomide

Journal of Neuro-Oncology volume 102, pages 311–316 (2011)Cite this article

Abstract

Epigenetic silencing of the O6-methylguanine-DNA-methyltransferase (MGMT) gene by promoter methylation is correlated with improved progression-free survival (PFS) and overall survival (OS) in adult patients with newly diagnosed glioblastoma multiforme (GBM) who receive alkylating agents. The aim of this study is to determine the correlation between MGMT and survival in elderly patients with GBM treated with radiotherapy (RT) and temozolomide (TMZ). Eighty-three patients aged 70 years or older with histologically confirmed GBM treated with RT plus TMZ between February 2005 and September 2009 were investigated in this study. The methylation status of the MGMT promoter was determined by polymerase chain reaction analysis. Median PFS and OS were 7.5 and 12.8 months, respectively. The MGMT promoter was methylated in 42 patients (50.6%) and unmethylated in 41 patients (49.4%). Median OS was 15.3 months in methylated patients and 10.2 months in unmethylated patients (P = 0.0001). Median PFS was 10.5 months in methylated tumors and 5.5 months in unmethylated tumors (P = 0.0001). On multivariate analysis MGMT methylation status emerged as the strongest independent prognostic factor for OS and PFS (P = 0.004 and P = 0.005, respectively). The results of the present study suggest that MGMT methylation status might be an important prognostic factor associated with better OS and PFS in elderly patients with GBM treated with RT and TMZ.

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Affiliations

  1. Department of Radiation Oncology, Sant’ Andrea Hospital, University “La Sapienza”, Via di Grottarossa 1035, 00189, Rome, Italy

    Giuseppe Minniti & R. Maurizi Enrici

  2. Department of Neurological Sciences, Neuromed Institute, Pozzilli (IS), Italy

    Giuseppe Minniti, M. Salvati, A. Arcella, G. Lanzetta, V. Esposito & F. Giangaspero

  3. Department of Pathology, Umberto I Hospital, University “La Sapienza”, Rome, Italy

    F. Buttarelli & F. Giangaspero

  4. Department of Neurosurgery, Umberto I Hospital, University “La Sapienza”, Rome, Italy

    A. D’Elia

  5. Department of Pathology, Sant’ Andrea Hospital, University “La Sapienza”, Via di Grottarossa 1035, 00189, Rome, Italy

    S. Scarpino

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  1. Giuseppe Minniti
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  2. M. Salvati
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  3. A. Arcella
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  4. F. Buttarelli
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  5. A. D’Elia
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  6. G. Lanzetta
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  7. V. Esposito
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  8. S. Scarpino
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  9. R. Maurizi Enrici
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  10. F. Giangaspero
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Correspondence to Giuseppe Minniti.

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Minniti, G., Salvati, M., Arcella, A. et al. Correlation between O6-methylguanine-DNA methyltransferase and survival in elderly patients with glioblastoma treated with radiotherapy plus concomitant and adjuvant temozolomide. J Neurooncol 102, 311–316 (2011). https://doi.org/10.1007/s11060-010-0324-4

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Keywords

  • Glioblastoma
  • Elderly
  • Radiotherapy
  • Temozolomide
  • MGMT