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Boar spermatozoa successfully predict mitochondrial modes of toxicity: implications for drug toxicity testing and the
A Vicente-Carrillo1, I Edebert2, H Garside3
1Developmental Biology, Department of Clinical and Experimental Medicine, Linköping University, Linköping, Sweden.
Summary
Boar spermatozoa serve as effective biosensors for toxicity assessment, offering a rapid, non-invasive alternative to animal testing. This method aids in preclinical toxicology screening and ranking drug compounds.
Area of Science:
- Toxicology
- Biotechnology
- Animal Alternative Methods
Background:
- The 3Rs principles (Replacement, Reduction, Refinement) necessitate validated in vitro methods for toxicity testing.
- Spermatozoa, with high ATP dependence, are sensitive to mitochondrial disturbances caused by chemicals.
Purpose of the Study:
- To validate boar spermatozoa as a suitable cell model for toxicity assessment.
- To develop a protocol for replacing animal testing in research and drug development.
Main Methods:
- Boar sperm motility was analyzed using a semi-automated motility analyzer.
- Real-time fluorescent probes (MitoTracker & JC-1) assessed mitochondrial potential.
- Sperm assay results were compared with HepG2 cell viability (ATP content) after chemical exposure.
Main Results:
- Sperm motility parameters significantly correlated with HepG2 cell viability (P<0.01).
- Decreased ATP content in HepG2 cells correlated with reduced sperm speed and motility.
- The sperm assay provided rapid (30 min) and objective toxicity data.
Conclusions:
- Boar spermatozoa are validated as suitable biosensors for preclinical toxicology screening.
- This non-invasive method offers a faster, objective alternative to traditional cell culture models.
- The protocol supports the 3Rs principles in drug development and chemical testing.
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