Neurotoxicity Assessment in Adult <em>Danio rerio</em> using a Battery of Behavioral Tests in a Single Tank

Juliette Bedrossiantz; Eva Prats; Demetrio Rald&#250;a

doi:10.3791/65869

Valutazione della neurotossicità in Danio rerio adulto utilizzando una batteria di test ...

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Neuroscience

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JoVE Journal Neuroscience

Neurotoxicity Assessment in Adult Danio rerio using a Battery of Behavioral Tests in a Single Tank

Valutazione della neurotossicità in Danio rerio adulto utilizzando una batteria di test comportamentali in un singolo serbatoio

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08:36 min

November 3, 2023

DOI: 10.3791/65869-v

Juliette Bedrossiantz¹, Eva Prats², Demetrio Raldúa¹

¹Institute for Environmental Assessment and Water Research (IDAEA-CSIC), ²Research and Development Center (CID-CSIC)

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Overview

This study introduces a behavioral test battery, including the novel tank, shoaling, and social preference tests, to investigate the neurotoxic effects of chemicals like methamphetamine and glyphosate on adult zebrafish. The protocol emphasizes reproducibility and sensitivity to genetic and pharmacological manipulations, enhancing the understanding of environmental neurotoxicity.

Key Study Components

Area of Science

Neurotoxicity
Behavioral pharmacology
Environmental research

Background

Investigates behavioral effects of pollutants and drugs in adult zebrafish.
Aims to understand underlying mechanisms of these behaviors.
Focuses on asocial and anxiety-like behaviors that cannot be assessed in embryos.
Established assays are sensitive and facilitate collaborative research.

Purpose of Study

To assess behavioral effects of neurotoxic chemicals on adult zebrafish.
To standardize behavioral tests for better reproducibility.
To explore mechanisms leading to observed behavioral changes.

Methods Used

Utilizes a behavioral test battery in a single tank setup for zebrafish.
Focuses on adult zebrafish as the primary biological model.
No multiomics or metabolic analyses were mentioned.
Involves configuring experimental tanks and using video analysis for behavioral assessment.
Outlines detailed steps for aquaria setup, video recording, and data analysis.

Main Results

Behavioral tests indicated significant changes in zebrafish exposed to methamphetamine, such as decreased exploration and increased anxiety.
Social behavior tests showed isolation phenotypes with increased distances between individuals after exposure.
Identified behavioral adjustments, enhancing understanding of neurotoxic impacts.

Conclusions

The study validates a comprehensive method for assessing neurotoxic impacts in zebrafish.
Enhances knowledge of environmental pollutants' effects on behavior.
Supports advancement in understanding neurotoxicity mechanisms relevant to environmental and pharmacological research.

Frequently Asked Questions

What are the advantages of using zebrafish in this research?

Zebrafish are transparent at early stages, allowing for non-invasive observation of behavior and development. They also have well-understood genetics and rapid development, making them ideal for behavioral studies.

How is the behavioral testing implemented?

Behavioral tests are conducted in specially configured tanks, where fish are recorded during specific assays such as the novel tank test or social preference test.

What types of data are collected during the experiments?

Data includes measures of distance traveled, time spent in various zones, and social interactions, providing insight into the anxiety and social behaviors of zebrafish.

How can these methods be adapted for other studies?

The protocols can be modified for different environmental pollutants or behavioral assays, ensuring flexibility for various research questions.

What limitations should be considered when using this model?

While zebrafish provide a valuable model, differences in brain structure and function compared to mammals must be considered when extrapolating results to other species.

How does this research contribute to understanding neurotoxicity?

By systematically assessing behavioral changes, this research helps elucidate the effects of environmental chemicals on neural mechanisms and behavior.

Why are behavioral assays important in neurotoxicology?

Behavioral assays offer insights into the functional impacts of neurotoxins, bridging molecular and organism-level effects, and revealing potential underlying mechanisms of toxicity.

Qui, presentiamo una batteria di test comportamentali completa, tra cui il nuovo serbatoio, Shoaling e i test di preferenza sociale, per determinare efficacemente i potenziali effetti neurotossici delle sostanze chimiche (ad esempio, metanfetamina e glifosato) sul pesce zebra adulto utilizzando un singolo acquario. Questo metodo è rilevante per la neurotossicità e la ricerca ambientale.

La nostra ricerca principale mira a identificare gli effetti comportamentali indotti da inquinanti ambientali e farmaci nei pesci. Cercando anche di capire i meccanismi che portano a questi effetti. Un comportamento sociale e ansiogeno non può essere affrontato in modo conveniente utilizzando gli embrioni.

Conduciamo studi mirati a questi comportamenti nel modello adulto di pesce zebra. Questo protocollo descrive in dettaglio come implementare strumenti comportamentali con risorse materiali di base per facilitare la riproducibilità dei test e armonizzare i risultati ottenuti all'interno della comunità scientifica. I saggi presentati in questo protocollo hanno dimostrato di essere altamente riproducibili e sensibili alle manipolazioni genetiche e farmacologiche, rendendoli strumenti variabili e non invasivi che favoriscono i meccanismi neurali e molecolari alla base del comportamento.

Una volta identificato uno sforzo comportamentale, la parte più impegnativa è determinare le specifiche modalità di azione che portano agli sforzi osservativi. Partendo dall'evento di inizio molecolare, in cui le previsioni possono fornire alcuni indizi sull'evento di inizio molecolare, siamo ancora lontani dall'ottenere previsioni accurate. Attualmente siamo interessati a determinare la validità di fase dei modelli chimici della malattia di Parkinson sviluppati in Zebrafish embrionali e adulti utilizzando MPTP e rotenone con lo stesso, verrà valutata la cinematica del movimento di andatura o durante un movimento esplosivo come la risposta acustica di fuga evocata.

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