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Methylation data from stored peripheral blood leukocytes from African American participants in the GENOA study with Infinium HumanMethylation450 BeadChip

ABSTRACT: Methylation data from stored peripheral blood leukocytes from African American participants in the GENOA study with Infinium HumanMethylation450 BeadChip

PROVIDER: PRJNA864862 | ENA |

REPOSITORIES: ENA

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Methylation data from stored peripheral blood leukocytes from African American participants in the GENOA study with Infinium HumanMethylation450 BeadChip

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Project description:Methylation data from stored peripheral blood leukocytes from African American participants in the GENOA study

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A framework for analyzing DNA methylation data from Illumina Infinium HumanMethylation450 BeadChip.

Project description:BACKGROUND:DNA methylation has been identified to be widely associated to complex diseases. Among biological platforms to profile DNA methylation in human, the Illumina Infinium HumanMethylation450 BeadChip (450K) has been accepted as one of the most efficient technologies. However, challenges exist in analysis of DNA methylation data generated by this technology due to widespread biases. RESULTS:Here we proposed a generalized framework for evaluating data analysis methods for Illumina 450K array. This framework considers the following steps towards a successful analysis: importing data, quality control, within-array normalization, correcting type bias, detecting differentially methylated probes or regions and biological interpretation. CONCLUSIONS:We evaluated five methods using three real datasets, and proposed outperform methods for the Illumina 450K array data analysis. Minfi and methylumi are optimal choice when analyzing small dataset. BMIQ and RCP are proper to correcting type bias and the normalized result of them can be used to discover DMPs. R package missMethyl is suitable for GO term enrichment analysis and biological interpretation.

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