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Related Experiment Video

Updated: Jan 22, 2026

Measuring Sperm Guidance and Motility within the Caenorhabditis elegans Hermaphrodite Reproductive Tract
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The Sperm Epigenome: Implications for Assisted Reproductive Technologies.

Douglas T Carrell1

  • 1Andrology and IVF Laboratories, Department of Surgery, and Department of Human Genetics, University of Utah School of Medicine, Salt Lake City, UT, USA. douglas.carrell@hsc.utah.edu.

Advances in Experimental Medicine and Biology
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PubMed
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Sperm epigenome modifications, including histone replacement and retained genes, are crucial for development. Epigenetic anomalies in sperm are linked to infertility and impact embryogenesis, suggesting diagnostic potential.

Keywords:
ARTDNA methylationEmbryogenesisEnvironmentEpigeneticsHistonesSmall RNAs

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Area of Science:

  • Reproductive Biology
  • Epigenetics
  • Developmental Biology

Background:

  • Sperm chromatin undergoes extensive histone-to-protamine replacement during spermiogenesis.
  • Key developmental genes, miRNA genes, and imprinted genes retain histone associations, often with a bivalent epigenetic signature.

Purpose of the Study:

  • To explore the role of the sperm epigenome in embryogenesis.
  • To investigate the diagnostic potential of sperm epigenetic markers for infertility and environmental factors.

Main Methods:

  • Analysis of histone retention and epigenetic signatures in sperm chromatin.
  • Assessment of DNA methylation, protamination, and histone modifications.
  • Evaluation of small noncoding RNA content in sperm.

Main Results:

  • Aberrant epigenetic signatures (DNA methylation, protamination, histone modifications) in sperm correlate with infertility and reduced embryogenesis.
  • Retained and newly acquired small noncoding RNAs in sperm influence embryogenesis.

Conclusions:

  • The sperm epigenome holds significant potential as a diagnostic tool for assessing male fertility and embryogenesis capability.
  • Sperm epigenetic analysis may offer insights into lifestyle and environmental impacts on reproductive health and offspring development.