Histone demethylase Jumonji D3 (JMJD3/KDM6B) at the nexus of epigenetic regulation of inflammation and the aging process.
Level 5 - mechanism / opinion, no new human data
Narrative review of molecular mechanisms without original human data
PubMed 24925089 · doi:10.1007/s00109-014-1182-x
What was done
The authors reviewed the molecular and epigenetic mechanisms of the inducible histone demethylase Jumonji domain-containing protein 3 (JMJD3/KDM6B), specifically examining its demethylase-dependent and independent functions in regulating immune cell polarization, inflammatory signaling, and cellular senescence pathways.
What was found
The abstract reports mechanistic pathways rather than quantitative empirical data. JMJD3 stimulates transcription by removing repressive H3K27me3 marks and interacting with chromatin modifiers. In immune regulation, JMJD3 promotes M2 macrophage polarization via STAT6, promotes CD4+ T cell Th1 differentiation via T-bet, and activates TGF-β signaling via SMAD3. In aging pathways, JMJD3 displaces polycomb complexes to induce INK4a expression and enhances p53 nuclear localization, driving cellular senescence.
Why it matters
It outlines how an inducible epigenetic modifier directly bridges inflammatory signaling and cellular senescence pathways relevant to aging biology.
Limits
The abstract describes a non-systematic narrative review of cellular mechanisms; it does not provide original experimental data, quantitative effect sizes, or human clinical outcomes.
Cited by
- supports The p16INK4a gene is methylated during early life and undergoes progressive demethylation as an individual ages.