Abstract:
:Current DNA methylation assays are limited in the flexibility and efficiency of characterizing a large number of genomic targets. We report a method to specifically capture an arbitrary subset of genomic targets for single-molecule bisulfite sequencing for digital quantification of DNA methylation at single-nucleotide resolution. A set of ~30,000 padlock probes was designed to assess methylation of ~66,000 CpG sites within 2,020 CpG islands on human chromosome 12, chromosome 20, and 34 selected regions. To investigate epigenetic differences associated with dedifferentiation, we compared methylation in three human fibroblast lines and eight human pluripotent stem cell lines. Chromosome-wide methylation patterns were similar among all lines studied, but cytosine methylation was slightly more prevalent in the pluripotent cells than in the fibroblasts. Induced pluripotent stem (iPS) cells appeared to display more methylation than embryonic stem cells. We found 288 regions methylated differently in fibroblasts and pluripotent cells. This targeted approach should be particularly useful for analyzing DNA methylation in large genomes.
journal_name
Nat Biotechnoljournal_title
Nature biotechnologyauthors
Deng J,Shoemaker R,Xie B,Gore A,LeProust EM,Antosiewicz-Bourget J,Egli D,Maherali N,Park IH,Yu J,Daley GQ,Eggan K,Hochedlinger K,Thomson J,Wang W,Gao Y,Zhang Kdoi
10.1038/nbt.1530subject
Has Abstractpub_date
2009-04-01 00:00:00pages
353-60issue
4eissn
1087-0156issn
1546-1696pii
nbt.1530journal_volume
27pub_type
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