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DNA methylation profiling in breast cancer discordant identical twins

ABSTRACT: We obtained a comprehensive DNA methylation profile of 15 breast cancer discordant twins, using the high resolution Infinium HumanMethylation450 BeadChip platform (450K, Illumina), previously established to reliably detect methylation changes of more than 450,000 CpG sites. To provide insight into the temporal and causal relationships and predictive potential, samples from breast cancer patients before (7) and after diagnosis (8) were also analyzed. Using whole blood from 15 twin pairs discordant for breast cancer and high-resolution (450k) DNA methylation analysis we identified 403 differentially methylated CpG sites including known and novel potential breast cancer genes.

ORGANISM(S): Homo sapiens

PROVIDER: GSE37965 | GEO | 2012/10/17

SECONDARY ACCESSION(S): PRJNA165843

REPOSITORIES: GEO

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DNA methylation profiling in breast cancer discordant identical twins

Project description:We obtained a comprehensive DNA methylation profile of 15 breast cancer discordant twins, using the high resolution Infinium HumanMethylation450 BeadChip platform (450K, Illumina), previously established to reliably detect methylation changes of more than 450,000 CpG sites. To provide insight into the temporal and causal relationships and predictive potential, samples from breast cancer patients before (7) and after diagnosis (8) were also analyzed. Using whole blood from 15 twin pairs discordant for breast cancer and high-resolution (450k) DNA methylation analysis we identified 403 differentially methylated CpG sites including known and novel potential breast cancer genes. 30 Samples

2012-10-17 | E-GEOD-37965 | biostudies-arrayexpress

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Comparison of the DNA methylation profiles of CD19+ B lymphocytes of a pair of monozygotic twins discordant for common variable immunodeficiency

Project description:The methylation profiles of bisulfite-modified DNA of CD19+ cells from MZ twins discordant for CVID were compared using the Infinium HumanMethylation450 BeadChips (Illumina, Inc., San Diego, CA,). This platform allows the interrogation of >485,000 methylation sites per sample at single-nucleotide resolution, and comprises an average of 17 CpG sites per gene in the 99% of RefSeq genes. 96% of CpG islands are covered, with additional coverage in CpG island shores and the regions flanking them. The samples were hybridized in the array following the manufacturer’s instructions. Total DNA isolated by standard procedures from CD19+ cells (total B lymphocytes) corresponding to two monozygotic twins discordant for common variable immunodeficiency.

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