Abstract：
:An outstanding challenge of epigenome-wide association studies (EWASs) performed in complex tissues is the identification of the specific cell type(s) responsible for the observed differential DNA methylation. Here we present a statistical algorithm called CellDMC ( https://github.com/sjczheng/EpiDISH ), which can identify differentially methylated positions and the specific cell type(s) driving the differential methylation. We validated CellDMC on in silico mixtures of DNA methylation data generated with different technologies, as well as on real mixtures from epigenome-wide association and cancer epigenome studies. CellDMC achieved over 90% sensitivity and specificity in scenarios where current state-of-the-art methods did not identify differential methylation. By applying CellDMC to an EWAS performed in buccal swabs, we identified smoking-associated differentially methylated positions occurring in the epithelial compartment, which we validated in smoking-related lung cancer. CellDMC may be useful in the identification of causal DNA-methylation alterations in disease.
journal_name
Nat Methodsjournal_title
Nature methodsauthors
Zheng SC,Breeze CE,Beck S,Teschendorff AEdoi
10.1038/s41592-018-0213-xsubject
Has Abstractpub_date
2018-12-01 00:00:00pages
1059-1066issue
12eissn
1548-7091issn
1548-7105pii
10.1038/s41592-018-0213-xjournal_volume
15pub_type
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