Age-related DNA Methylation Changes Are Sex-specific: a Comprehensive Assessment
Overview
Authors
Affiliations
The existence of a sex gap in human health and longevity has been widely documented. Autosomal DNA methylation differences between males and females have been reported, but so far few studies have investigated if DNA methylation is differently affected by aging in males and females. We performed a meta-analysis of 4 large whole blood datasets, comparing 4 aspects of epigenetic age-dependent remodeling between the two sexes: differential methylation, variability, epimutations and entropy. We reported that a large fraction (43%) of sex-associated probes undergoes age-associated DNA methylation changes, and that a limited number of probes show age-by-sex interaction. We experimentally validated 2 regions mapping in and genes and showed sex-specific deviations of their methylation patterns in models of decelerated (centenarians) and accelerated (Down syndrome) aging. While we did not find sex differences in the age-associated increase in epimutations and entropy, we showed that the number of probes having an age-related increase in methylation variability is 15 times higher in males compared to females. Our results can offer new epigenetic tools to study the interaction between aging and sex and can pave the way to the identification of molecular triggers of sex differences in longevity and age-related diseases prevalence.
Age-related changes in DNA methylation in a sample of elderly Brazilians.
Welsh H, Batalha C, Li W, Souza-Pinto N, Duarte Y, Naslavsky M Clin Epigenetics. 2025; 17(1):17.
PMID: 39910411 PMC: 11796210. DOI: 10.1186/s13148-025-01821-3.
Shealy E, Schwartz T, Cox R, Reedy A, Parrott B Sci Adv. 2025; 11(5):eadq3589.
PMID: 39888991 PMC: 11784858. DOI: 10.1126/sciadv.adq3589.
Associations between inflammation and striatal dopamine D2-receptor availability in aging.
Crine V, Papenberg G, Johansson J, Boraxbekk C, Wahlin A, Lindenberger U J Neuroinflammation. 2025; 22(1):24.
PMID: 39885603 PMC: 11783874. DOI: 10.1186/s12974-025-03355-0.
A systematic review of associations between the environment, DNA methylation, and cognition.
Glover S, Illyuk J, Hill C, McGuinness B, McKnight A, Hunter R Environ Epigenet. 2025; 11(1):dvae027.
PMID: 39882510 PMC: 11776599. DOI: 10.1093/eep/dvae027.
Epigenetic Mechanisms Underlying Sex Differences in Neurodegenerative Diseases.
Stoccoro A Biology (Basel). 2025; 14(1).
PMID: 39857328 PMC: 11761232. DOI: 10.3390/biology14010098.