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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Evidence that DNA methylation imbalance is not involved in the development of malignant mesothelioma.

Methylation dysregulation has been a consistent finding in various malignancies, particularly those where the pathogenetic mechanisms are unclear. In order to test the hypothesis that methylation imbalance may not be a feature of cancers where the aetiologic agent or process is known, we studied the methylation status of the myogenic genes Myf-3 and Myf-4 by Southern blotting in malignant mesothelioma, a cancer strongly associated with asbestos exposure. DNA samples obtained from controls and mesothelioma patients did not exhibit hypermethylation of Myf-3 and hypomethylation of Myf-4, as noted in malignant lymphomas. The methylation status of Myf-3 and Myf-4 in malignant mesothelioma was similar to that of non-malignant cells indicating that dysregulation of the DNA methylating machinery may not be involved in mesothelioma development. The present findings do not support the view that methylation imbalance is a consequence of neoplastic transformation, but indicate that it may be one of the early molecular events involved in the genesis of some cancers.[1]


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