How Histone Modification Changes With Age
Histone modification patterns shift with age across tissues and model systems. This page summarises what the research literature reports on age-related changes in histone marks, the enzymes that write and erase them, and
What histone modification is
Histone modification refers to the covalent addition or removal of chemical groups on the N-terminal tails and globular domains of histone proteins, the core components of the nucleosome. The four canonical histones — H2A, H2B, H3, and H4 — assemble into an octamer around which approximately 147 base pairs of DNA are wrapped. Common modifications include acetylation, methylation, phosphorylation, ubiquitination, and SUMOylation, and they are deposited and removed by families of enzymes collectively termed epigenetic regulators. Histone modification is one of several epigenetic mechanisms, alongside DNA methylation, non-coding RNA regulation, and N⁶-methyladenosine (m⁶A) RNA remodelling, that together influence chromatin structure and gene expression without altering the underlying DNA sequence [1].
The work described on this page centres on the histone-modifying enzyme families — histone acetyltransferases (HATs), histone deacetylases (HDACs), histone methyltransferases (HMTs), and histone demethylases (KDMs) — and on the chromatin marks they regulate, including acetylation and methylation at specific lysine residues.
Research Studies
Histone modification changes and gynaecological malignancy models
A synthesis of evidence on epigenetic alterations in gynaecological cancers — ovarian, cervical, and endometrial malignancies — reported that epigenetic dysregulation involving aberrant DNA methylation, altered histone modifications, dysregulated non-coding RNAs, and m⁶A RNA remodelling contributes to tumour heterogeneity, recurrence, and therapeutic resistance. The same review evaluated dietary and natural compounds as epigenetic modulators in these cancer models. It explicitly identified direct evidence that natural compounds modulate m⁶A machinery in gynaecological cancers as absent, describing this as a knowledge gap [1].
Histone modification and polyphenol exposure in neurodegenerative disease models
A review of polyphenolic compounds in neurodegenerative disease reported that epigenetic regulation, including DNA methylation, histone modifications, and non-coding RNA regulation, plays a critical role in the onset and progression of these disorders. The neurodegenerative disease models described involve oxidative stress, chronic inflammation, protein misfolding, and impaired synaptic plasticity. Natural polyphenolic compounds were characterised in that review as multi-target agents under investigation for neuroprotection [2].
Histone modification in innate immune memory in Alzheimer's disease models
Alzheimer's disease is increasingly described in the literature as a disorder driven by dysregulated innate immunity rather than solely by amyloid-β accumulation. Microglia, the brain's resident innate immune cells, can acquire long-term functional memory — termed trained immunity or innate immune memory — through epigenetic mechanisms. This framing places histone modification among the processes proposed to underlie persistent microglial functional states in Alzheimer's disease models [4].
JMJD3-dependent histone demethylation and leptin receptor regulation in the hypothalamus
Leptin resistance is a hallmark of obesity and is characterised by diminished responsiveness to leptin, disrupting energy homeostasis. Transcriptional repression of the leptin receptor (LepRb) is described as a critical defect impairing downstream signal transduction. In this work, alternate-day fasting was reported to enhance leptin sensitivity via JMJD3-dependent epigenetic regulation of the leptin receptor in the hypothalamus. JMJD3 is a histone demethylase, placing the finding within the histone-modification enzyme family [6].
Histone modification and mesenchymal stem cell aging in bone
Aging of the skeleton is a hallmark of organismal decline and underlies age-related disorders such as osteoporosis and osteoarthritis. Bone marrow-derived mesenchymal stem cells (BMSCs), the primary source of osteoblasts, undergo functional deterioration during senescence, producing an imbalance in bone formation and resorption. This review addresses mechanisms, impact, and therapeutic perspectives relating to BMSC aging in bone aging [7].
Histone modification and sORF-encoded microproteins
The human genome contains hundreds of thousands of short open reading frames (sORFs), whose translational products — sORF-encoded microproteins, historically termed micropeptides — have long been overlooked in conventional genome annotation. Increasing evidence demonstrates that these products carry biological functions. This body of work is relevant to the annotation of epigenetic regulatory machinery, including histone-modifying enzymes, at the level of small translated products [5].
Comparison of epigenetic mechanisms reported across disease models
| Mechanism | Model or population | Reported involvement | Source |
|---|---|---|---|
| Histone modifications | Gynaecological cancers (ovarian, cervical, endometrial) | Contributes to heterogeneity, recurrence, therapeutic resistance | [1] |
| DNA methylation | Gynaecological cancers | Reported as aberrant | [1] |
| Non-coding RNAs | Gynaecological cancers | Reported as dysregulated | [1] |
| m⁶A RNA remodelling | Gynaecological cancers | Reported as dysregulated; natural-compound modulation absent | [1] |
| Histone modifications | Neurodegenerative disease models | Critical role in onset and progression | [2] |
| Histone modification (JMJD3-dependent) | Hypothalamus, leptin resistance model | Regulation of LepRb; modified by alternate-day fasting | [6] |
| Epigenetic mechanisms | Microglia, Alzheimer's disease models | Proposed basis of innate immune memory | [4] |
Ancestry-related genomic variation and cardiovascular phenotypes
The GENE-FORECAST study was designed to develop a community-based cohort and genomic science resource for defining the biological significance of ancestry-related genomic variation in African-Americans. Its stated aims were to examine associations between common or ancestry-related DNA variants and cardiovascular disease risk factors such as hypertension and phenotypes such as coronary artery calcification, and to examine associations between health behaviours or social-environmental factors and those risk factors and phenotypes in African-American participants [3]. This resource is genomic rather than histone-focused, and is included here as context for how population-level studies are structured.
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Sources
- [1] Natural compounds as epigenetic modulators in gynaecological cancers: From chemoresistance to precision oncology. https://pubmed.ncbi.nlm.nih.gov/42468209/
- [2] Epigenetic regulators polyphenols in neurodegenerative diseases: a promising intervention strategy. https://europepmc.org/article/PMC/PMC13045177
- [3] Genomics, Environmental Factors and Social Determinants of Cardiovascular Disease in African-Americans Study (GENE-FORECAST). https://clinicaltrials.gov/study/NCT02055209
- [4] Immunopharmacological reprogramming of innate immune memory in Alzheimer's disease: From microglial priming to therapeutic resilience. https://pubmed.ncbi.nlm.nih.gov/42632547/
- [5] Emerging regulators of human physiology and disease; sORF-encoded microproteins. https://pubmed.ncbi.nlm.nih.gov/42576277/
- [6] Alternate-day fasting enhances leptin sensitivity via JMJD3-dependent epigenetic regulation of the leptin receptor in the hypothalamus. https://europepmc.org/article/PMC/PMC13480440/
- [7] Aging of mesenchymal stem cells in bone aging: Mechanisms, impact, and therapeutic perspectives. https://pubmed.ncbi.nlm.nih.gov/42409289/