Epigenetic Mechanisms in Vascular Disease

Epigenetic regulation—heritable changes in gene function without alteration of the DNA sequence—has emerged as a central driver of vascular pathology. In the arterial wall, DNA methylation, histone modifications and non-coding RNAs coordinately influence endothelial cell homeostasis, smooth muscle phenotypic switching and immune cell activation. Disturbed blood flow and local metabolic cues remodel the endothelial epigenome via changes in methyltransferase activity and histone acetylation status, altering transcriptional programmes that govern inflammation, barrier integrity and nitric oxide production. In smooth muscle cells, locus-specific methylation patterns and histone marks dictate proliferation, calcification and extracellular matrix synthesis. Macrophage DNA methylation and chromatin remodelling steer pro-inflammatory versus reparative phenotypes within atherosclerotic lesions. Environmental stimuli—ranging from oxidised lipids to dietary factors—further sculpt the vascular epigenome, creating a dynamic interface between risk exposures and gene expression. These insights have paved the way for novel biomarkers of lesion progression and the development of epigenetic therapies, including site-directed inhibitors and RNA-based modalities designed to stabilise plaques and restore vascular function.

Research from Nature Portfolio

Recent studies have delineated a pivotal pathway in which heightened activity of DNA methyltransferase 1 in macrophages drives methylation of the PPARγ promoter, supressing its anti-inflammatory programme and accelerating plaque formation. Genetic overexpression of DNMT1 in murine models intensified pro-inflammatory cytokine release and vascular lesion burden, whereas pharmacological activation or transgenic restoration of PPARγ counteracted these effects, reducing plaque size and improving inflammatory profiles. Analysis of patient monocytes revealed an inverse correlation between DNMT1 and PPARγ expression, underscoring the translational potential of targeting macrophage methylation dynamics to prevent or reverse atherosclerosis.

Epigenetic Mechanisms in Vascular Disease publication trend

The graph below shows the total number of articles in epigenetic mechanisms in vascular disease across all publications each year (not limited to Nature Index journals).

Technical terms

DNA methylation: Addition of a methyl group to DNA cytosine residues, typically repressing nearby gene transcription.

Histone deacetylase: Enzyme that removes acetyl groups from histone tails, leading to chromatin compaction and reduced gene expression.

Cis-regulatory element: Non-coding DNA sequence that controls transcription of adjacent genes by serving as a binding site for regulatory proteins.

Inflammasome: Multi-protein complex in immune cells that activates inflammatory cytokines and drives immune responses.

Shear stress: Mechanical force exerted by blood flow on endothelial surfaces, influencing cellular signalling and epigenetic states.

References

1. A cis-regulatory element controls expression of histone deacetylase 9 to fine-tune inflammasome-dependent chronic inflammation in atherosclerosis. Immunity (2025).
2. DNA methylation and histone post-translational modifications in atherosclerosis and a novel perspective for epigenetic therapy. Cell Communication and Signaling (2023).
3. Metaboloepigenetics: Role in the Regulation of Flow-Mediated Endothelial (Dys)Function and Atherosclerosis. Cells (2025).
4. DNMT1-PPARγ pathway in macrophages regulates chronic inflammation and atherosclerosis development in mice. Scientific Reports (2016).