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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...

Replication in Eukaryotes

Replication in Eukaryotes

In eukaryotic cells, DNA replication is highly conserved and tightly regulated. Multiple linear chromosomes must be duplicated with high fidelity before cell division, so there are many proteins that fulfill specialized roles in the replication process. Replication occurs in three phases: initiation, elongation, and termination, and ends with two complete sets of chromosomes in the nucleus.
Many Proteins Orchestrate Replication at the Origin
Eukaryotic replication follows many of the same...

Replication in Eukaryotes

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Related Experiment Video

Updated: May 30, 2026

Analysis of Transgenerational Epigenetic Inheritance in C. elegans Using a Fluorescent Reporter and Chromatin Immunoprecipitation (ChIP)

Analysis of Transgenerational Epigenetic Inheritance in C. elegans Using a Fluorescent Reporter and Chromatin Immunoprecipitation (ChIP)

Published on: May 5, 2023

Aged worms erase epigenetic history.

Victoria V Lunyak¹, Brian K Kennedy

¹Buck Institute for Research on Aging, Novato, CA 94945, USA. vlunyak@buckinstitute.org

Cell Metabolism

|August 2, 2011

Summary

Researchers found that increased utx-1 expression reduces histone H3K27 trimethylation, impacting the aging pathway. This discovery sheds light on molecular mechanisms driving aging and multisystem decline.

Area of Science:

Molecular biology
Genetics
Aging research

Background:

Understanding the molecular underpinnings of aging is crucial for addressing age-related diseases.
The insulin/IGF-1 signaling (IIS) pathway is a key regulator of aging across species.

Discussion:

Jin et al. (2011) demonstrate that elevated levels of the histone demethylase utx-1 lead to a global reduction in histone H3K27 trimethylation.
This epigenetic modification affects numerous genes, including those involved in the insulin/IGF-1 signaling (IIS) pathway.

Key Insights:

Increased utx-1 expression directly influences epigenetic marks associated with aging.
The study links histone demethylation to the regulation of the IIS pathway, a central aging regulator.
This provides a novel molecular target for interventions aimed at modulating the aging process.

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Last Updated: May 30, 2026

Analysis of Transgenerational Epigenetic Inheritance in C. elegans Using a Fluorescent Reporter and Chromatin Immunoprecipitation (ChIP)

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Published on: May 5, 2023

Detection of Modified Forms of Cytosine Using Sensitive Immunohistochemistry

Detection of Modified Forms of Cytosine Using Sensitive Immunohistochemistry

Published on: August 16, 2016

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

Outlook:

Further research can explore therapeutic strategies targeting utx-1 or H3K27 trimethylation to promote healthy aging.
Investigating the downstream effects of reduced H3K27 trimethylation in various tissues will be important.
This work opens new avenues for understanding and potentially intervening in multisystem decline associated with aging.