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Epigenetic Regulation01:46

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

Updated: Feb 6, 2026

Measuring Single-Cell Aging with an Imaging-based Biomarker of Chromatin and Epigenetic Aging
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Published on: January 30, 2026

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Sperm epigenetics and aging.

Timothy G Jenkins1, Kenneth I Aston1, Douglas T Carrell1,2,3

  • 1Andrology and IVF Laboratories, Department of Surgery, University of Utah School of Medicine, Salt Lake City, Utah, USA.

Translational Andrology and Urology
|August 31, 2018
PubMed
Summary
This summary is machine-generated.

Advanced paternal age impacts fertility and offspring health. Sperm DNA methylation patterns reveal aging, offering potential for personalized risk assessment in couples.

Keywords:
Epigeneticsagingmale fertilitysperm

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Area of Science:

  • Reproductive biology
  • Epigenetics
  • Genomic imprinting

Background:

  • Advanced paternal age is associated with fertility challenges, including delayed time to pregnancy and reduced conception rates.
  • Offspring of older fathers face increased risks for neuropsychiatric disorders, highlighting the need to understand male reproductive aging.

Purpose of the Study:

  • To investigate the changes in the sperm epigenome related to male aging.
  • To explore the potential of sperm DNA methylation as a biomarker for paternal age and associated health risks in offspring.

Main Methods:

  • Analysis of DNA methylation patterns in sperm from males of varying ages.
  • Development of a predictive model to estimate age based on sperm DNA methylation signatures.

Main Results:

  • Consistent patterns of aging are detectable in the sperm epigenome through DNA methylation.
  • A predictive model successfully estimated chronological age using sperm DNA methylation signatures.

Conclusions:

  • Sperm DNA methylation patterns serve as a direct indicator of sperm aging.
  • These epigenetic marks hold potential for developing diagnostic tools to identify personalized risks for couples affected by advanced paternal age.