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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.

Spermatogenesis

Spermatogenesis

Spermatogenesis is the process by which haploid sperm cells are produced in the male testes. It starts with stem cells located close to the outer rim of seminiferous tubules. These spermatogonial stem cells divide asymmetrically to give rise to additional stem cells (meaning that these structures “self-renew”), as well as sperm progenitors, called spermatocytes. Importantly, this method of asymmetric mitotic division maintains a population of spermatogonial stem cells in the male reproductive...

Sperm Structure and Semen Composition

Sperm Structure and Semen Composition

During ejaculation, males release around 2-5 milliliters of semen, which is a complex mixture of mature sperm and various fluids produced by accessory glands. The mature sperm cells measure approximately 60 micrometers in length and consist of a head, neck, midpiece, and tail. The head is flattened and tapered, measuring about 4 to 5 micrometers in length. It contains a nucleus with condensed chromosomes and an acrosome, a cap-like structure filled with enzymes essential for penetrating the...

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 deacetylase,...

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...

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Related Experiment Video

Updated: Jul 7, 2026

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

Published on: June 17, 2025

[Research progress in epigenetics of sperm].

Bin Yang¹, Xin-Yi Xia, Yu-Feng Huang

¹PLA Research Institute of Clinical Laboratory Medicine, Nanjing General Hospital of Nanjing Military Command, PLA , Nanjing, Jiangsu 210002, China. ybdz@163.com

Zhonghua Nan Ke Xue = National Journal of Andrology

|February 21, 2008

Summary

This study reviews epigenetics in male germ cells, focusing on DNA methylation and histone modifications. It highlights the importance of understanding epigenetic messages for spermatogenesis and fertilization, and discusses risks associated with assisted reproductive technology.

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Last Updated: Jul 7, 2026

Stable Isotope In-Vivo Labeling for Mass-Spectrometry Identification of Paternal Metabolites Transferred from Sperm to Oocyte During Fertilization

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Published on: June 17, 2025

Flow Cytometric Analysis of Biomarkers for Detecting Human Sperm Functional Defects

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Phosphopeptide Analysis of Rodent Epididymal Spermatozoa

Phosphopeptide Analysis of Rodent Epididymal Spermatozoa

Published on: December 30, 2014

Area of Science:

Epigenetics and Molecular Biology
Reproductive Science

Context:

Epigenetic modifications are crucial for germ cell development.
Understanding these changes is vital for reproductive health.

Purpose:

To provide an overview of recent research on male germ cell epigenetics.
To discuss potential genetic risks linked to assisted reproductive technologies.

Summary:

Explores key epigenetic mechanisms like DNA methylation, histone modifications, and non-coding RNA regulation in male gametes.
Details significant epigenetic reprogramming during spermatogenesis and fertilization.
Examines the implications of epigenetic alterations for ART outcomes.

Impact:

Enhances understanding of male fertility and inheritance.
Informs safety assessments for assisted reproductive technologies.
Identifies areas for future research in reproductive epigenetics.