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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 Regulation

Epigenetic Regulation

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

Histone Modification

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...

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...

Position-effect Variegation

Position-effect Variegation

In 1928, a German botanist Emil Heitz observed the moss nuclei with a DNA binding dye. He observed that while some chromatin regions decondense and spread out in the interphase nucleus, others do not. He termed them euchromatin and heterochromatin, respectively. He proposed that the heterochromatin regions reflect a functionally inactive state of the genome. It was later confirmed that heterochromatin is transcriptionally repressed, and euchromatin is transcriptionally active chromatin.

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Related Experiment Video

Updated: May 5, 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

[Attach importance to eye epigenetic research].

Shi-kun He¹, Xiao-hua Li

¹Doheny Eye Institute, Keck School of Medicine,University of South California, Los angeles 90033,USA.

[Zhonghua Yan Ke Za Zhi] Chinese Journal of Ophthalmology

|November 22, 2013

Summary

This summary is machine-generated.

Epigenetic mechanisms like DNA methylation and microRNAs influence human diseases. Understanding epigenetics in the eye offers new insights into complex eye disease pathogenesis and treatment.

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

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Published on: August 29, 2018

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Area of Science:

Biomedical research
Genetics
Epigenetics

Background:

Human disease pathogenesis is increasingly linked to epigenetic and genetic abnormalities.
Key epigenetic factors include DNA methylation, histone modifications, and microRNAs (miRNAs), which interact to regulate gene expression and cell phenotype.

Discussion:

Epigenetics is a rapidly growing field in biomedical research, investigating whole-genome regulation.
It plays crucial roles in development, aging, regeneration, tumorigenesis, and complex disease pathology.

Key Insights:

Eye diseases may arise from interactions between environmental and genetic factors, modulated by epigenetic mechanisms.
Epigenetic research provides novel perspectives on understanding and treating complex eye conditions.

Outlook:

Further investigation into ocular epigenetics is essential for advancing treatment strategies.
This research area holds promise for novel therapeutic approaches to eye diseases.