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자료유형
학술저널
저자정보
Yang, Seung-Heon (Department of Neurosurgery, Seoul National University College of Medicine) Kim, Yong-Hwy (Department of Neurosurgery, Seoul National University College of Medicine) Kim, Jin-Wook (Department of Neurosurgery, Seoul National University College of Medicine) Park, Chul-Kee (Department of Neurosurgery, Seoul National University College of Medicine) Park, Sung-Hye (Department of Pathology, Seoul National University College of Medicine) Jung, Hee-Won (Department of Neurosurgery, Seoul National University College of Medicine)
저널정보
대한신경외과학회 대한신경외과학회지 대한신경외과학회지 제46권 제4호
발행연도
2009.1
수록면
385 - 388 (4page)

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Objective : We analyzed the methylation status of the O6-methylguanine-DNA methyltransferase (MGMT) gene promoter in World Health Organization (WHO) grade III gliomas in association with other molecular markers to evaluate their prevalence. Methods : The samples of a total of 36 newly WHO grade III glioma patients including 19 anaplastic oligodendrogliomas (AO), 7 anaplastic oligoastrocytomas (AOA), and 10 anaplastic astrocytomas (AA) were analyzed. The methylation status of the MGMT gene promoter was confirmed by methylation-specific polymerase chain reaction. The 1p/19q chromosomal deletion status and EGFR amplification were assessed by Fluorescence In-Situ Hybridization. MGMT, EGFR, EGFRvlll, and p53 expression were analyzed by immunohistochemical staining. Results : The MGMT gene promoter was methylated in 32 (88.9%) and unmethylated in 4 (11.2%) Among them, all of the AO and AOA had methylated MGMT gene promoter without exception. Significant associations between MGMT gene promoter hypermethylation and 1p/19q deletion was observed (p=0.003). Other molecular markers failed to show significant associations between MGMT gene promoter statuses. Conclusion : There was extensive epigenetic silencing of MGMT gene in high grade gliomas with oligodendroglial component. Together with frequent 1p/19q co-deletion in oligodendroglial tumors, this may add plausible explanations supporting the relative favorable prognosis in oligodendroglial tumors compared with pure astrocytic tumors.

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