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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.

Fertilization

Fertilization

During fertilization, an egg and sperm cell fuse to create a new diploid structure. In humans, the process occurs once the egg has been released from the ovary, and travels into the fallopian tubes. The process requires several key steps: 1) sperm present in the genital tract must locate the egg; 2) once there, sperm need to release enzymes to help them burrow through the protective zona pellucida of the egg; and 3) the membranes of a single sperm cell and egg must fuse, with the sperm...

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...

Spermatogenesis

Spermatogenesis

Spermatogenesis is a complex process that involves the development of sperm cells from undifferentiated stem cells in the seminiferous tubules of the testes. The process is essential for the production of mature and functional sperm cells that are capable of fertilizing an egg.
The process of spermatogenesis can be divided into mitosis, meiosis, and spermiogenesis. During mitosis, the spermatogonia or stem cells divide to produce two identical daughter cells, type A and B spermatogonia. Type-A...

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Related Experiment Video

Updated: May 8, 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

The sperm epigenome: implications for the embryo.

John R Gannon¹, Benjamin R Emery, Timothy G Jenkins

¹Division of Urology, Department of Surgery, University of Utah School of Medicine, Salt Lake City, UT, USA.

Advances in Experimental Medicine and Biology

|August 20, 2013

Summary

This summary is machine-generated.

The sperm epigenome, involving heritable changes affecting gene expression, plays a crucial role in embryogenesis. Abnormalities in sperm epigenetics are linked to male infertility and poor embryo development.

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Area of Science:

Epigenetics
Sperm biology
Developmental biology

Background:

The genetic code extends beyond DNA sequence to include epigenetic programming, which influences gene expression.
Epigenetics is vital for understanding disease mechanisms and environmental impacts on gene activity.
This work focuses on the sperm epigenome and its role in embryogenesis.

Purpose of the Study:

To highlight the unique characteristics of the sperm epigenome.
To explore the potential role of the sperm epigenome in embryogenesis.
To discuss the implications of sperm epigenetic abnormalities.

Main Methods:

Review of current literature on sperm epigenetics and embryogenesis.
Analysis of sperm chromatin packaging and histone modifications.
Examination of DNA methylation patterns in sperm.

Main Results:

Sperm chromatin is highly compacted with protamines, protecting DNA.
Histone modifications in sperm, similar to embryonic stem cells, include both activating and silencing marks.
Bivalent marks and DNA hypomethylation create a poised state for gene activation during embryogenesis.

Conclusions:

The sperm epigenome is unique and specialized for fertilization and early development.
Sperm epigenetic abnormalities are associated with male infertility and poor embryogenesis.
Understanding the sperm epigenome is key to addressing reproductive health issues.