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Genome-Wide Investigation of DNA Methylation Marks Associated with FV Leiden Mutation
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Genome-Wide Investigation of DNA Methylation Marks Associated with FV Leiden Mutation
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Genome-Wide Investigation of DNA Methylation Marks Associated with FV Leiden Mutation
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Journal Article
Genome-Wide Investigation of DNA Methylation Marks Associated with FV Leiden Mutation
2014
Overview
In order to investigate whether DNA methylation marks could contribute to the incomplete penetrance of the FV Leiden mutation, a major genetic risk factor for venous thrombosis (VT), we measured genome-wide DNA methylation levels in peripheral blood samples of 98 VT patients carrying the mutation and 251 VT patients without the mutation using the dedicated Illumina HumanMethylation450 array. The genome-wide analysis of 388,120 CpG probes identified three sites mapping to the SLC19A2 locus whose DNA methylation levels differed significantly (p<3 10-8) between carriers and non-carriers. The three sites replicated (p<2 10-7) in an independent sample of 214 individuals from five large families ascertained on VT and FV Leiden mutation among which 53 were carriers and 161 were non-carriers of the mutation. In both studies, these three CpG sites were also associated (2.33 10-110.05). In conclusion, our work clearly illustrates some promises and pitfalls of DNA methylation investigations on peripheral blood DNA in large epidemiological cohorts. DNA methylation levels at SLC19A2 are influenced by SNPs in LD with FV Leiden, but these DNA methylation marks do not explain the incomplete penetrance of the FV Leiden mutation.
Publisher
Public Library of Science,Public Library of Science (PLoS)
Subject
/ Blood
/ Carriers
/ DNA
/ Female
/ Genome-Wide Association Study
/ Genomics
/ Humans
/ Loci
/ Male
/ Medicine and Health Sciences
/ Mutation
/ Patients
