Overview of studies on rat sperm motion analysis using a Hamilton-Thorne Sperm Analyzer--collaborative working study.

Area of Science:

• Reproductive toxicology
• Sperm analysis
• Biomonitoring

Background:

• Chemicals can adversely affect sperm motion, impacting male reproductive health.
• Accurate assessment of sperm motion parameters is crucial for detecting chemical toxicity.
• The Hamilton-Thorne Sperm Analyzer (HTM-IVOS) provides multiple sperm motion parameters.

Purpose of the Study:

• To evaluate the utility and sensitivity of nine sperm motion parameters from the HTM-IVOS for detecting chemical-induced adverse effects on rat sperm motion.
• To compare the efficacy of different sperm motion parameters in identifying both strong and weak effects of reproductive toxicants.

Main Methods:

• Utilized nine reproductive toxicants (adriamycin, alpha-chlorohydrin, dinoseb, etc.) in rat studies.
• Analyzed nine sperm motion parameters generated by the HTM-IVOS.
• Assessed the detection rates of adverse effects by each parameter across multiple studies, including those with low and medium dosages.

Main Results:

• Percentage of progressively motile sperm and sperm velocity parameters detected adverse effects in all studies.
• % progressive sperm detected weak effects in 5/7 studies; velocity parameters detected weak effects in 6/7 studies.
• % motile sperm detected effects in 9/10 studies but missed weak effects in 4/7; ALH and BCF showed limitations in detecting certain adverse effects.

Conclusions:

• Percentage of progressively motile sperm and sperm velocity parameters are sensitive and useful indicators for detecting chemical toxicity on sperm motion.
• Optimizing thresholds for VAP and STR can enhance the sensitivity of % progressive sperm.
• While % motile sperm is useful for overall assessment, ALH and BCF are better for evaluating swimming patterns, and STR/LIN are less useful for toxicity detection.