Histone modification aging describes age-associated changes in chemical modifications of histone proteins that regulate chromatin structure and gene expression. Histone acetylation, methylation, and phosphorylation patterns shift with age, altering transcriptional control. These changes affect genes involved in repair, metabolism, and stress response. Histone modification aging contributes to transcriptional instability and reduced adaptability. Environmental stress, metabolic changes, and epigenomic drift accelerate these alterations. Because histone modifications are reversible, they represent potential targets for aging interventions. Understanding histone modification aging helps link epigenetic regulation to functional decline during aging.
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