Abstract
The suitability of ejaculated bovine spermatozoa as an in vitro model for the assessment of the cytotoxic potential of chemicals was evaluated using several endpoints: swimming activity, adenine nucleotide content, membrane integrity and oxygen consumption. A series of chlorophenols inhibited sperm motion (motility and velocity) in a concentration-dependent manner. This could be determined quantitatively and reproducibly by means of videomicrography and automatic computer image analysis. The sperm immobilizing potency increased with increasing chlorination and was positively correlated with lipophilicity. Concentrations which reduced the percentage of moving sperm to 50% of controls ranged from 43 µM for pentachlorophenol (PCP) to 1440 µM for 4-monochlorophenol (4-MCP). Determinations of adenine nucleotides and percentages of viable cells revealed qualitative differences between the action of PCP and the lower chlorinated phenols. While the latter decreased the total adenine nucleotide contents and the percentage of unstained cells in parallel to motion inhibition, no such changes occurred after exposure to immobilizing concentrations of PCP. Penta-, tetra- and trichlorinated phenols stimulated cellular respiration, indicating their uncoupling activity, at concentrations lower than those necessary for motion inhibition. The results indicate that bovine spermatozoa may become a useful in vitro model for the toxicological evaluation of chemicals providing quantitative as well as qualitative data.
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Abbreviations
- PCP:
-
pentachlorophenol
- 2,3,4,5-TCP:
-
2,3,4,5-tetrachlorophenol
- 2,4,5-TCP:
-
2,4,5trichlorophenol
- 2,4-DCP:
-
2,4-dichlorophenol
- 4-MCP:
-
4-monochlorophenol
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Seibert, H., Kolossa, M. & Wassermann, O. Bovine spermatozoa as anin vitro model for studies on the cytotoxicity of chemicals: effects of chlorophenols. Cell Biol Toxicol 5, 315–330 (1989). https://doi.org/10.1007/BF01795359
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DOI: https://doi.org/10.1007/BF01795359