Roles of Histone Acetylation Modifiers and Other Epigenetic Regulators in Vascular Calcification

Duk-Hwa Kwon1, Juhee Ryu1, Young-Kook Kim2

  • 1Department of Pharmacology, Chonnam National University Medical School, Hwasun 58128, Korea.

Insights

Vascular calcification (VC) involves calcium buildup in arteries, linked to cardiovascular diseases. Epigenetic regulators, like histone deacetylases, offer potential therapeutic targets for treating VC.

Area of Science:

  • Biomedical Science
  • Cardiovascular Research
  • Epigenetics

Background:

  • Vascular calcification (VC) is arterial calcium deposition, a major risk factor for cardiovascular diseases (CVDs), atherosclerosis, diabetes, and chronic kidney disease.
  • VC is an active cellular process involving vascular smooth muscle cells (VSMCs) transitioning to an osteochondrogenic phenotype, mimicking bone formation.
  • Epigenetic factors such as DNA methylation, histone modification, and noncoding RNAs significantly regulate VC development.

Purpose of the Study:

  • To review current evidence on the role of epigenetic regulators in VC.
  • To explore histone deacetylases (HDACs) as key epigenetic factors in VC.
  • To propose therapeutic implications of targeting epigenetic regulators for VC treatment.

Main Methods:

  • Literature review of experimental evidence on VC and epigenetic regulation.
  • Focus on studies investigating histone deacetylases (HDACs) in the context of VC.
  • Analysis of the link between epigenetic mechanisms and VSMC phenotype switching.

Main Results:

  • VC is an active process in VSMCs, sharing similarities with bone formation.
  • Epigenetic modifications, including histone modifications by HDACs, play a crucial role in regulating VC.
  • Evidence suggests HDACs are implicated in the osteochondrogenic differentiation of VSMCs during VC.

Conclusions:

  • Epigenetic regulators, particularly histone deacetylases, are critical in the pathogenesis of vascular calcification.
  • Targeting epigenetic mechanisms, specifically HDACs, presents a promising therapeutic strategy for VC.
  • Further research into HDAC inhibitors could lead to novel treatments for VC and associated cardiovascular conditions.

Related Concept Videos

Regulation of Angiogenesis and Blood Supply01:24

Regulation of Angiogenesis and Blood Supply

Rapidly dividing tumors, embryos, and wounded tissues require more oxygen than usual, lowering the oxygen concentration in the blood. At low oxygen or hypoxic conditions, an oxygen-sensitive transcription factor called the hypoxia-inducible factor 1 or HIF1 is activated. HIF1 is a dimeric protein of alpha (ɑ) and beta (β) subunits.  Under optimal oxygen conditions, HIF1β is present in the nucleus while HIF1ɑ remains in the cytosol. HIF1ɑ is hydroxylated by prolyl...
3.2K
Histone Modification02:32

Histone Modification

The histone proteins have a flexible N-terminal tail extending out from the nucleosome. These histone tails are often subjected to post-translational modifications such as acetylation, methylation, phosphorylation, and ubiquitination. Particular combinations of these modifications form “histone codes” that influence the chromatin folding and tissue-specific gene expression.
Acetylation
The enzyme histone acetyltransferase adds acetyl group to the histones. Another enzyme, histone...
15.6K
Histone Modification02:32

Histone Modification

4.2K
Epigenetic Regulation01:37

Epigenetic Regulation

Epigenetic changes alter the physical structure of the DNA without changing the genetic sequence and often regulate whether genes are turned on or off. This regulation ensures that each cell produces only proteins necessary for its function. For example, proteins that promote bone growth are not produced in muscle cells. Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
X-chromosome...
3.6K
Epigenetic Regulation01:46

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.
33.3K
Spreading of Chromatin Modifications02:25

Spreading of Chromatin Modifications

The histone proteins in the nucleosomes are post-translationally modified (PTM) to increase or decrease access to DNA. The commonly observed PTMs are methylation, acetylation, phosphorylation, and ubiquitination of lysine amino acids in the histone H3 tail region. These histone modifications have specific meaning for the cell. Hence, they are called "histone code". The protein complex involved in histone modification is termed as "reader-writer" complex.
Writers
The writer...
9.2K