A pooling-based approach to mapping genetic variants associated with DNA methylation
Abstract
DNA methylation is an epigenetic modification that plays a key role in gene regulation. Previous studies have investigated its genetic basis by mapping genetic variants that are associated with DNA methylation at specific sites, but these have been limited to microarrays that cover <2% of the genome and cannot account for allele-specific methylation (ASM). Other studies have performed whole-genome bisulfite sequencing on a few individuals, but these lack statistical power to identify variants associated with DNA methylation. We present a novel approach in which bisulfite-treated DNA from many individuals is sequenced together in a single pool, resulting in a truly genome-wide map of DNA methylation. Compared to methods that do not account for ASM, our approach increases statistical power to detect associations while sharply reducing cost, effort, and experimental variability. As a proof of concept, we generated deep sequencing data from a pool of 60 human cell lines; we evaluated almost twice as many CpGs as the largest microarray studies and identified more than 2000 genetic variants associated with DNA methylation. Here we found that these variants are highly enriched for associations with chromatin accessibility and CTCF binding but are less likely to be associated with traits indirectly linked tomore »
- Authors:
-
- Stanford Univ., CA (United States). Dept. of Computer Science and Dept. of Biology
- Univ. of British Columbia, Vancouver, BC (Canada). Centre for Molecular Medicine and Therapeutics and Child and Family Research Inst.
- Univ. of British Columbia, Vancouver, BC (Canada). Centre for Molecular Medicine and Therapeutics and Child and Family Research Inst. and Dept. of Medical Genetics
- Stanford Univ., CA (United States). Dept. of Biology
- Publication Date:
- Research Org.:
- Stanford Univ., CA (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA); National Institutes of Health (NIH); National Science Foundation (NSF)
- OSTI Identifier:
- 1344874
- Grant/Contract Number:
- FG02-97ER25308
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Genome Research
- Additional Journal Information:
- Journal Volume: 25; Journal Issue: 6; Journal ID: ISSN 1088-9051
- Publisher:
- Cold Spring Harbor Laboratory Press
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 59 BASIC BIOLOGICAL SCIENCES
Citation Formats
Kaplow, Irene M., MacIsaac, Julia L., Mah, Sarah M., McEwen, Lisa M., Kobor, Michael S., and Fraser, Hunter B. A pooling-based approach to mapping genetic variants associated with DNA methylation. United States: N. p., 2015.
Web. doi:10.1101/gr.183749.114.
Kaplow, Irene M., MacIsaac, Julia L., Mah, Sarah M., McEwen, Lisa M., Kobor, Michael S., & Fraser, Hunter B. A pooling-based approach to mapping genetic variants associated with DNA methylation. United States. https://doi.org/10.1101/gr.183749.114
Kaplow, Irene M., MacIsaac, Julia L., Mah, Sarah M., McEwen, Lisa M., Kobor, Michael S., and Fraser, Hunter B. Fri .
"A pooling-based approach to mapping genetic variants associated with DNA methylation". United States. https://doi.org/10.1101/gr.183749.114. https://www.osti.gov/servlets/purl/1344874.
@article{osti_1344874,
title = {A pooling-based approach to mapping genetic variants associated with DNA methylation},
author = {Kaplow, Irene M. and MacIsaac, Julia L. and Mah, Sarah M. and McEwen, Lisa M. and Kobor, Michael S. and Fraser, Hunter B.},
abstractNote = {DNA methylation is an epigenetic modification that plays a key role in gene regulation. Previous studies have investigated its genetic basis by mapping genetic variants that are associated with DNA methylation at specific sites, but these have been limited to microarrays that cover <2% of the genome and cannot account for allele-specific methylation (ASM). Other studies have performed whole-genome bisulfite sequencing on a few individuals, but these lack statistical power to identify variants associated with DNA methylation. We present a novel approach in which bisulfite-treated DNA from many individuals is sequenced together in a single pool, resulting in a truly genome-wide map of DNA methylation. Compared to methods that do not account for ASM, our approach increases statistical power to detect associations while sharply reducing cost, effort, and experimental variability. As a proof of concept, we generated deep sequencing data from a pool of 60 human cell lines; we evaluated almost twice as many CpGs as the largest microarray studies and identified more than 2000 genetic variants associated with DNA methylation. Here we found that these variants are highly enriched for associations with chromatin accessibility and CTCF binding but are less likely to be associated with traits indirectly linked to DNA, such as gene expression and disease phenotypes. In summary, our approach allows genome-wide mapping of genetic variants associated with DNA methylation in any tissue of any species, without the need for individual-level genotype or methylation data.},
doi = {10.1101/gr.183749.114},
journal = {Genome Research},
number = 6,
volume = 25,
place = {United States},
year = {Fri Apr 24 00:00:00 EDT 2015},
month = {Fri Apr 24 00:00:00 EDT 2015}
}
Web of Science
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