A colour preference technique to evaluate acrylamide-induced toxicity in zebrafish

Area of Science:

• Comparative Ophthalmology
• Neurotoxicology
• Behavioral Pharmacology

Background:

• Zebrafish are valuable vertebrate models for toxicity studies due to retinal similarities with humans.
• Assessing visual system toxicity is crucial for understanding human health impacts.
• Behavioral assays are essential for evaluating the functional consequences of toxicity.

Purpose of the Study:

• To introduce a novel color preference-based technique for assessing zebrafish photoreceptor function and behavioral toxicity.
• To evaluate the efficacy of this technique in detecting acrylamide-induced visual and behavioral deficits.
• To establish a method for preclinical drug efficacy assessment and neurodegenerative disorder research.

Main Methods:

• Utilized a two-compartment tank with independently controlled colored lighting (blue, white, red).
• Recorded and analyzed zebrafish locomotor behavior and color preference using a digital camera and MATLAB algorithm.
• Assessed photoreceptor functionality by observing color sensing and inter-compartment swimming behavior.
• Administered acute acrylamide treatment and performed histopathological examination of retinal damage.

Main Results:

• Zebrafish exhibited a clear color preference: blue > white > red.
• Acrylamide treatment significantly reduced locomotion and abolished color-preferential swimming.
• Histopathology confirmed acrylamide-induced retinal damage in treated zebrafish.
• The technique successfully detected functional and structural toxicity.

Conclusions:

• The color preference tracking technique is a sensitive method for evaluating visual system toxicity in zebrafish.
• This assay can detect behavioral and functional deficits caused by neurotoxicants like acrylamide.
• The technique holds promise for preclinical drug efficacy testing and evaluating neurodegenerative disorders.