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Epigenetic Regulation

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...

Epigenetic Regulation

Epigenetic Regulation

Epigenetic mechanisms play an essential role in healthy development. Conversely, precisely regulated epigenetic mechanisms are disrupted in diseases like cancer.

Mitochondria

Mitochondria

Mitochondria are eukaryotic cellular organelles that are known to produce energy through a process called oxidative phosphorylation. Besides their primary function, mitochondria are involved in various cellular processes, including cell growth, differentiation, signaling, metabolism, and senescence. Age-related changes cause a decline in mitochondrial quality and integrity due to increased mitochondrial mutations and oxidative damage. Thus, aging can severely impact mitochondrial functions,...

Aging

Aging

Aging is a complex biological phenomenon influenced by various processes that affect cellular and systemic functions. Several prominent theories attempt to explain its mechanisms, highlighting cellular limitations, oxidative damage, and hormonal changes as central factors in aging.
Cellular Clock Theory
The cellular clock theory posits that the human lifespan is closely tied to the finite capacity of cells to divide, a phenomenon governed by telomeres, which are protective caps at the ends of...

Inheritance of Chromatin Structures

Inheritance of Chromatin Structures

Epigenetics is the study of inherited changes in a cell's phenotype without changing the DNA sequences. It provides a form of memory for the differential gene expression pattern to maintain cell lineage, position-effect variegation, dosage compensation, and maintenance of chromatin structures such as telomeres and centromeres. For example, the structure and location of the centromere on chromosomes are epigenetically inherited. Its functionality is not dictated or ensured by the underlying...

Spreading of Chromatin Modifications

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.
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Related Experiment Video

Updated: Apr 16, 2026

Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging

Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging

Published on: January 30, 2026

Chromatin methylation and cardiovascular aging.

Barbara Illi¹, Roberta Ciarapica², Maurizio C Capogrossi²

¹Institute of Molecular Biology and Pathology, National Research Council (IBPM-CNR), Rome, Italy.

Journal of Molecular and Cellular Cardiology

|March 1, 2015

Summary

Aging alters DNA and histone methylation, known as epigenetic drift. This review focuses on these age-dependent epigenetic changes, particularly in relation to cardiovascular diseases (CVDs).

Keywords:

Aging Cardiovascular disease DNA methylation Histone methylation

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Area of Science:

Epigenetics and Molecular Biology
Cardiovascular Science
Aging Research

Background:

DNA and histone methylation are key epigenetic modifications.
These epigenetic marks change significantly during the aging process, a phenomenon termed 'epigenetic drift'.
Existing research on age-dependent epigenetic changes is limited in the cardiovascular field.

Purpose of the Study:

To review age-dependent alterations in DNA and histone methylation.
To specifically examine the role of these epigenetic changes in age-related cardiovascular diseases (CVDs).

Main Methods:

Literature review of studies on aging, epigenetics, and cardiovascular diseases.
Synthesis of current knowledge on DNA and histone methylation patterns in aged cells and tissues.
Focus on studies investigating the link between epigenetic drift and cardiovascular health.

Main Results:

Aged cells and tissues exhibit altered DNA methylation patterns (epigenetic drift).
Changes in histone methylation profiles are also observed with aging.
These epigenetic alterations are increasingly recognized as contributing factors to age-related cardiovascular diseases.

Conclusions:

Age-dependent epigenetic changes, including DNA and histone methylation alterations, are significant.
Understanding these changes is crucial for elucidating the mechanisms behind age-related cardiovascular diseases (CVDs).
Further research is warranted to explore therapeutic strategies targeting epigenetic modifications in CVDs.