DNA Methylation Changes in Stem Cells
Author Information
Author(s): Reed Xylena, Weller Cory A., Saez-Atienzar Sara, Beilina Alexandra, Solaiman Sultana, Portley Makayla, Kaileh Mary, Roy Roshni, Ding Jinhui, Zenobia Moore A., Thad Whitaker D., Traynor Bryan J., Raphael Gibbs J., Scholz Sonja W., Cookson Mark R.
Primary Institution: National Institutes of Health
Hypothesis
Does aging-related DNA methylation persist when cells are reprogrammed to an induced pluripotent stem cell (iPSC) state?
Conclusion
The study found that age-related DNA methylation is largely reset in iPSCs derived from peripheral blood mononuclear cells (PBMCs).
Supporting Evidence
- iPSCs lack age-related methylation signatures tested using five different epigenetic clocks.
- DNA methylation patterns are distinct between iPSCs and PBMCs.
- Genetic effects on CpG methylation were observed in both PBMCs and iPSCs.
Takeaway
Scientists looked at how aging affects DNA in blood cells and found that when these cells are turned into stem cells, the aging signs disappear.
Methodology
The study involved converting PBMCs from 99 healthy individuals into iPSCs and analyzing DNA methylation patterns using genome-wide arrays.
Potential Biases
Potential underestimation of effects due to the heterogeneity of PBMCs.
Limitations
The sample size is relatively small, and the comparison was made with heterogeneous PBMC populations.
Participant Demographics
Participants were healthy individuals aged 22 to 92, with diverse genetic backgrounds.
Statistical Information
P-Value
2.95 × 10−37
Statistical Significance
p<0.05
Digital Object Identifier (DOI)
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