Influence of enterococci on human sperm membrane in vitro

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Fluorimetric Techniques for the Assessment of Sperm Membranes
08:58

Fluorimetric Techniques for the Assessment of Sperm Membranes

Published on: November 28, 2018

Hua Qiang1, Ming-Sen Jiang, Jian-Yin Lin

  • 1Department of Pathogenic Biology Etiology, School of Medicine, Wuhan University, Wuhan 430071, China. qianghua66@sina.com

Asian Journal of Andrology
|July 21, 2006
PubMed
Abstract

Insights

Beta-hemolytic enterococci significantly damage human sperm membranes in vitro. This sperm membrane injury may be caused by enterococcal hemolysin, impacting male fertility.

Area of Science:

  • Reproductive Biology
  • Microbiology
  • Cell Biology

Background:

  • Enterococci are bacteria that can cause various infections.
  • Sperm membrane integrity is crucial for male fertility.
  • The impact of enterococci on sperm health requires further investigation.

Purpose of the Study:

  • To investigate the in vitro effects of enterococci on human sperm membrane integrity.
  • To differentiate the effects of beta-hemolytic and non-beta-hemolytic enterococci.

Main Methods:

  • Human sperm were artificially infected with different enterococci strains.
  • Sperm membrane integrity was assessed using the hypoosmotic swelling (HOS) test.
  • Electron microscopy was employed to visualize sperm membrane damage.

Main Results:

  • Beta-hemolytic enterococci significantly reduced HOS scores compared to controls.
  • Phosphatidylcholine, a hemolysin inhibitor, improved HOS scores in sperm exposed to beta-hemolytic enterococci.
  • Electron microscopy confirmed membrane rupture in sperm exposed to beta-hemolytic enterococci.

Conclusions:

  • Beta-hemolytic enterococci induce human sperm membrane injury.
  • Enterococcal hemolysin is a likely mediator of this sperm damage.
  • These findings suggest a potential mechanism affecting male reproductive health.

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