Biotests in Cyanobacterial Toxicity Assessment-Efficient Enough or Not?

Area of Science:

• Environmental toxicology
• Aquatic ecology
• Biomonitoring

Background:

• Cyanobacteria produce diverse, potent cyanotoxins threatening human, animal, and environmental health.
• Physico-chemical methods struggle to assess complex cyanotoxin mixtures and their effects.
• The traditional mouse bioassay faces ethical and practical limitations.

Purpose of the Study:

• To systematically review alternative bioassays for cyanotoxin detection and toxicity assessment.
• To evaluate the sensitivity, efficiency, and usefulness of these alternative models.
• To explore mechanisms of cyanotoxicity at various biological levels.

Main Methods:

• Review of scientific literature on alternative organisms (aquatic vertebrates and invertebrates) and in vitro models.
• Assessment of model responses to harmful cyanobacterial metabolites.
• Analysis of biological organization levels for toxicity evaluation.

Main Results:

• Alternative bioassays are evolving, moving beyond the mouse model.
• Detecting cyanotoxins in environmental samples and characterizing toxicity mechanisms remain challenging.
• A multi-level approach, combining whole-organism, molecular, and biochemical studies, is necessary.

Conclusions:

• Further research is needed to refine and standardize bioassays for cyanotoxicity testing.
• Novel model organisms and in vitro/computational methods can reduce animal use and improve risk assessment.
• Understanding cyanotoxicity requires integrated approaches across biological scales.