Related Experiment Video
Updated: Jun 13, 2025
09:12
Nanoparticle-mediated siRNA Gene-silencing in Adult Zebrafish Heart
Published on: July 29, 2018
8.1K
Silver Nanoparticles Exposure Impairs Cardiac Development by Suppressing the Focal Adhesion Pathway in Zebrafish
Chunjiao Lu1, Xuewei Wu1, Xin Meng1
1Engineering Research Center of Key Technique for Biotherapy of Guangdong Province, Shantou University Medical College, Shantou, 515041, People's Republic of China.
International Journal of Nanomedicine
|September 16, 2024
Summary
Silver nanoparticles (AgNPs) exposure in zebrafish caused cardiac developmental malformations and reduced cardiac gene expression. AgNPs impair cardiac development by affecting the focal adhesion pathway.
Area of Science:
- Environmental toxicology
- Developmental biology
- Nanotechnology
Background:
- Silver nanoparticles (AgNPs) in wastewater pose risks to aquatic ecosystems.
- Understanding AgNP toxicity on cardiac development is crucial for environmental and human health.
- The role of the Focal Adhesion pathway in AgNP-induced cardiotoxicity is poorly understood.
Purpose of the Study:
- To investigate the cardiac developmental toxicity of AgNPs in zebrafish.
- To explore the molecular mechanisms, particularly the Focal Adhesion pathway, underlying AgNP cardiotoxicity.
Main Methods:
- Zebrafish embryos were exposed to various concentrations of AgNPs.
- Cardiac development was assessed using microscopy.
- Gene expression analysis (qRT-PCR, WISH) and transcriptome analysis (RNA sequencing) were performed.
- Bioinformatic analyses (KEGG, GSEA) identified affected pathways.
Main Results:
- AgNP exposure (2-4 mg/L) induced cardiac malformations, including pericardial edema.
- Expression of cardiac development genes (e.g., myh7, tbx5) was significantly downregulated.
- Transcriptome analysis revealed enrichment of downregulated genes in the focal adhesion pathway.
- Key focal adhesion pathway genes (e.g., igf1ra, akt1) showed decreased mRNA levels.
Conclusions:
- AgNPs induce cardiac developmental toxicity in zebrafish.
- The Focal Adhesion pathway is a key target of AgNP toxicity in cardiac development.
- These findings highlight the environmental risks of AgNPs to aquatic life.
