MGMT promoter methylation is a rare epigenetic change in malignant effusions.

Abstract

OBJECTIVE:

The aim of this study was to analyse the promoter methylation status of the gene O6-methylguanine-DNA methyltransferase (MGMT) in malignant effusions, with focus on serous carcinoma.

METHODS:

Fresh-frozen cell pellets from 81 effusions (42 peritoneal, 38 pleural, one pericardial), consisting of 71 carcinomas of different origin (33 ovarian, 23 breast, six lung, five uterine corpus and four cervical carcinomas) and 10 malignant mesotheliomas, were analysed for MGMT methylation using pyrosequencing analysis.

RESULTS:

MGMT methylation at all four cytosine-guanine dinucleotide sites examined was detected in only 2/81 (2%) specimens, consisting of a high-grade serous carcinoma with high frequency of methylation, and a breast carcinoma with low methylation frequency.

CONCLUSION:

The findings in the present study suggest that MGMT methylation is a rare epigenetic change in malignant effusions of different origin.

• Authors: Marta Brunetti, Ioannis Panagopoulos, Francesca Micci, Ben Davidson
• Journal: Cytopathology : official journal of the British Society for Clinical Cytology (Cytopathology) Vol. 31 Issue 1 Pg. 12-15 (01 2020) ISSN: 1365-2303 [Electronic] England
• PMID: 31808217 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)
• Copyright: © 2019 The Authors. Cytopathology published by John Wiley & Sons Ltd.

Chemical References

• Tumor Suppressor Proteins
• DNA Modification Methylases
• MGMT protein, human
• DNA Repair Enzymes

Topics

• Adult
• Aged
• Aged, 80 and over
• Carcinoma (genetics)
• DNA Methylation (genetics)
• DNA Modification Methylases (genetics)
• DNA Repair Enzymes (genetics)
• Epigenesis, Genetic (genetics)
• Female
• Gene Expression Regulation, Neoplastic (genetics)
• Humans
• Male
• Middle Aged
• Promoter Regions, Genetic (genetics)
• Tumor Suppressor Proteins (genetics)