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Related Experiment Videos

Human sperm DNA integrity: correlation with sperm cytoplasmic droplets.

Marc Anthony Fischer1, Jennifer Willis, Armand Zini

  • 1Division of Urology, Department of Surgery, Mount Sinai Hospital, University of Toronto, Toronto, Ontario, Canada.

Urology
|February 1, 2003
PubMed
Summary

Infertile men show higher sperm cytoplasmic droplet (CD) retention and DNA denaturation (DD) compared to fertile men. These findings suggest abnormal sperm cytoplasm disposal contributes to DNA damage in infertility.

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Area of Science:

  • Reproductive Biology
  • Andrology
  • Spermatozoa Physiology

Background:

  • Sperm cytoplasmic droplet (CD) retention and DNA denaturation (DD) are indicators of sperm quality.
  • Understanding the relationship between CD, DD, and male infertility is crucial for diagnosis and treatment.

Purpose of the Study:

  • To investigate the association between sperm cytoplasmic droplet (CD) retention and DNA denaturation (DD) in semen.
  • To compare CD and DD levels in semen from fertile and infertile men.

Main Methods:

  • Semen samples were collected from nonazoospermic infertile men (n=101) and fertile men (n=13).
  • Standard semen parameters, sperm DNA denaturation (DD) via flow cytometry, and sperm cytoplasmic droplet (CD) retention were assessed.

Main Results:

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  • Significantly higher percentages of spermatozoa with CD and DD were observed in infertile men compared to fertile men.
  • Sperm CD and DD showed a positive correlation (r=0.59) and inverse correlation with standard semen parameters.

Conclusions:

  • Elevated sperm CD retention is positively correlated with sperm DNA denaturation (DD).
  • Infertile men exhibit higher levels of both sperm CD and DD, suggesting impaired residual cytoplasm removal.
  • These findings indicate that abnormal cytoplasmic droplet disposal in the testis/epididymis may lead to increased sperm DNA susceptibility to denaturation.