In vitro toxicology test system based on common carp (Cyprinus carpio) sperm analysis

Area of Science:

• Ecotoxicology
• Environmental Science
• Aquatic Toxicology

Background:

• In vitro ecotoxicology often uses fish sperm as a model.
• Standardized methods for assessing heavy metal effects on fish sperm are lacking.

Purpose of the Study:

• To evaluate a standardized protocol for assessing heavy metal toxicity on common carp sperm.
• To determine the sensitivity of different sperm motility parameters to heavy metals.

Main Methods:

• In vitro exposure of common carp sperm to various heavy metals (arsenic, cadmium, chromium, copper, mercury, nickel, zinc).
• Analysis of sperm motility parameters: progressive motility (PMOT), curvilinear velocity (VCL), and linearity (LIN).
• Comparison of results with previous studies on zebrafish sperm using the same protocol.

Main Results:

• Progressive motility (PMOT) was the most sensitive parameter, showing dose-response effects at low concentrations after 30 minutes for all tested metals.
• Curvilinear velocity (VCL) was less sensitive than PMOT.
• Linearity (LIN) was the least affected parameter, with dose-response only observed for arsenic and mercury.
• Common carp sperm exhibited similar sensitivity to heavy metals as zebrafish sperm, except for As3+, where carp sperm were more sensitive.

Conclusions:

• Progressive motility (PMOT) of common carp sperm is a rapid and accurate bioindicator for aquatic heavy metal pollution.
• The tested protocol is effective for assessing ecotoxicological impacts on fish sperm motility.