Transcriptome analysis of zebrafish embryos exposed to deltamethrin

Area of Science:

• Environmental Toxicology
• Molecular Biology
• Genomics

Background:

• Deltamethrin (DTM) is a widely used pyrethroid insecticide with potential adverse effects.
• Previous research has not fully elucidated the molecular mechanisms of DTM toxicity in aquatic organisms, particularly zebrafish embryos.

Purpose of the Study:

• To investigate the global gene expression changes in zebrafish embryos exposed to Deltamethrin.
• To identify key biological pathways affected by DTM treatment using transcriptomic analysis.

Main Methods:

• RNA sequencing (RNA-seq) was employed to analyze differential gene expression in zebrafish embryos exposed to 40 and 80 μg/L DTM.
• Quantitative reverse transcription PCR (qRT-PCR) was used to validate RNA-seq findings for selected genes.
• Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway analyses were performed.

Main Results:

• Significant differential gene expression was observed in DTM-treated zebrafish embryos compared to controls.
• The most affected genes were primarily involved in signaling transduction pathways.
• KEGG analysis highlighted enrichment in G-protein-coupled receptor signaling and neuroactive ligand-receptor interactions.

Conclusions:

• DTM exposure significantly impacts the transcriptome of zebrafish embryos, affecting crucial signaling pathways.
• This study provides insights into the molecular consequences of DTM exposure in aquatic ecosystems.
• The findings contribute to evaluating the ecological risk of Deltamethrin to fish populations.