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Thiol status in human sperm.

O Rufas1, B Fisch, J Seligman

  • 1Department of Obstetrics and Gynecology, Beilinson Medical Center, Tel Aviv, Israel.

Molecular Reproduction and Development
|July 1, 1991
PubMed
Summary
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Human sperm thiol-disulfide status, measured using monobromobimane, differs between oligozoospermic and normozoospermic samples. However, no correlation was found with routine sperm parameters or in vitro fertilizing capacity within normozoospermic individuals.

Area of Science:

  • Reproductive biology
  • Biochemistry
  • Andrology

Background:

  • Spermatozoa stabilization during epididymal transit involves thiol group oxidation.
  • Understanding thiol-disulfide status is crucial for assessing sperm function.

Purpose of the Study:

  • To investigate the relationship between human sperm thiol-disulfide status and standard semen analysis parameters.
  • To evaluate the utility of monobromobimane fluorescence for sperm analysis.

Main Methods:

  • Utilized monobromobimane fluorescent probe to assess thiol-disulfide status in human spermatozoa.
  • Measured fluorescence intensity via spectrofluorimetry.
  • Analyzed frequency distribution of fluorescence using a fluorescence-activated cell sorter.

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Main Results:

  • The mean proportion of reactive thiols (SH/(SS + SH)) was 29.8% +/- 2.5% in 29 semen samples.
  • Oligozoospermic samples exhibited distinct thiol labeling patterns compared to normozoospermic samples (P < 0.05).
  • No significant correlation was observed between thiol labeling patterns and routine sperm parameters or in vitro fertilizing capacity in normozoospermic samples.

Conclusions:

  • Sperm thiol-disulfide status, assessed by monobromobimane, can differentiate between oligozoospermic and normozoospermic individuals.
  • Thiol-disulfide status does not appear to correlate with routine semen parameters or fertilizing potential in normozoospermic men.
  • Preparation methods (swim-up vs. whole semen) did not influence thiol labeling patterns.