DNA Methylation Patterns and Genetic Variation in HapMap Cell Lines
Author Information
Author(s): Jordana T. Bell, Athma A. Pai, Joseph K. Pickrell, Daniel J. Gaffney, Roger Pique-Regi, Jacob F. Degner, Yoav Gilad, Jonathan K. Pritchard
Primary Institution: The University of Chicago
Hypothesis
How do genetic variations influence DNA methylation patterns and gene expression levels?
Conclusion
The study shows a strong genetic influence on DNA methylation variation, with evidence of shared mechanisms affecting both methylation and gene expression.
Supporting Evidence
- 180 CpG sites in 173 genes were associated with nearby SNPs.
- Significant negative correlations were found between promoter methylation and gene expression levels.
- An enrichment of SNPs affecting both methylation and gene expression was observed.
Takeaway
This study looked at how our genes can change the way our DNA is marked, which can affect how our genes work. It found that some of these changes are linked to our genetic makeup.
Methodology
Methylation levels were measured at 22,290 CpG sites in lymphoblastoid cell lines from 77 individuals, with association analyses performed against over three million SNPs.
Potential Biases
Potential technical variation related to cell culture may influence the observed DNA methylation patterns.
Limitations
The study's sample size may limit the power to detect subtle effects of genetic variants on methylation variation.
Participant Demographics
Participants were unrelated individuals from the HapMap Yoruba population.
Statistical Information
P-Value
4.5 × 10-9
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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