Genome-wide analysis of constitutional DNA methylation in familial melanoma.

Clinical Epigenetics
Catarina SalgadoRemco van Doorn

Abstract

Heritable epigenetic alterations have been proposed as an explanation for familial clustering of melanoma. Here we performed genome-wide DNA methylation analysis on affected family members not carrying pathogenic variants in established melanoma susceptibility genes, compared with healthy volunteers. All melanoma susceptibility genes showed the absence of epimutations in familial melanoma patients, and no loss of imprinting was detected. Unbiased genome-wide DNA methylation analysis revealed significantly different levels of methylation in single CpG sites. The methylation level differences were small and did not affect reported tumour predisposition genes. Our results provide no support for heritable epimutations as a cause of familial melanoma.

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Datasets Mentioned

BETA
EGAS00001001077

Software Mentioned

minfi
MethylAid
TFBIND

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