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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.

Epigenetic Regulation

Epigenetic Regulation

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

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 DNA...

RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...

RNA Stability

RNA Stability

Intact DNA strands can be found in fossils, while scientists sometimes struggle to keep RNA intact under laboratory conditions. The structural variations between RNA and DNA underlie the differences in their stability and longevity. Because DNA is double-stranded, it is inherently more stable. The single-stranded structure of RNA is less stable but also more flexible and can form weak internal bonds. Additionally, most RNAs in the cell are relatively short, while DNA can be up to 250 million...

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Related Experiment Video

Updated: May 29, 2026

Immunohistochemical Detection of 5-Methylcytosine and 5-Hydroxymethylcytosine in Developing and Postmitotic Mouse Retina

Immunohistochemical Detection of 5-Methylcytosine and 5-Hydroxymethylcytosine in Developing and Postmitotic Mouse Retina

Published on: August 29, 2018

Epigenetic mechanisms and genome stability.

Emily L Putiri¹, Keith D Robertson

¹Department of Biochemistry and Molecular Biology, Cancer Research Center, CN-2151, Medical College of Georgia, 1410 Laney Walker Blvd., Augusta, GA 30912, USA.

Clinical Epigenetics

|September 20, 2011

Summary

Epigenetic marks, heritable DNA modifications, impact gene activity and genomic integrity. This review explores their roles in DNA repair, sequence preservation, and chromosomal organization, linking them to human health and disease.

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Area of Science:

Genetics and Molecular Biology
Epigenetics
Genomic Stability

Background:

Epigenetic marks are heritable chemical modifications of DNA and chromatin.
These modifications influence gene activity through chromatin structure changes.
Their role in maintaining genomic integrity is increasingly recognized.

Purpose of the Study:

To review the multifaceted roles of epigenetic marks in preserving genomic integrity.
To discuss the involvement of epigenetic marks and associated enzymes in DNA repair and maintenance.
To explore the impact of epigenetic regulation on chromosomal organization and human disease.

Main Methods:

Literature review of epigenetic mechanisms and genomic maintenance.
Analysis of the functions of epigenetic marks and enzymes in DNA repair.
Examination of the relationship between epigenetic regulation and chromosomal structure.

Main Results:

Epigenetic marks are crucial for preserving nucleotide sequences, including repetitive elements.
Enzymes involved in epigenetics play key roles in preventing DNA damage and facilitating DNA repair.
Epigenetic regulation defines chromosomal organization, notably at the centromere.

Conclusions:

Epigenetic marks significantly contribute to maintaining the stability and integrity of the human genome.
Dysregulation of epigenetic processes can lead to impaired DNA repair and chromosomal abnormalities.
Understanding these epigenetic functions is vital for comprehending human health and disease pathogenesis.