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Global Gene Expression Analysis Using a Zebrafish Oligonucleotide Microarray Platform
Published on: August 10, 2009
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Gene co-expression network analysis in zebrafish reveals chemical class specific modules.
Prarthana Shankar1, Ryan S McClure2, Katrina M Waters1,2
1Department of Environmental and Molecular Toxicology, Sinnhuber Aquatic Research Laboratory, 28645 East Highway 34, Oregon State University, Corvallis, OR, 97331, USA.
BMC Genomics
|September 14, 2021
Summary
This study created the first zebrafish gene co-expression network to reveal how flame retardant chemicals (FRCs) and Aryl Hydrocarbon Receptor 2 (AHR2) activators impact gene expression, highlighting distinct pathways for each chemical class.
Area of Science:
- Toxicogenomics
- Zebrafish models
- Chemical biology
Background:
- Zebrafish are crucial for high-throughput chemical hazard screening.
- Understanding transcriptomic mechanisms of chemical toxicity requires further investigation.
- This study focuses on Aryl Hydrocarbon Receptor 2 (AHR2) activators and flame retardant chemicals (FRCs) in developing zebrafish.
Purpose of the Study:
- To identify genes and biological pathways affected by AHR2 activators and FRCs in zebrafish.
- To construct a chemical-specific gene co-expression network.
- To compare the transcriptomic responses induced by these two chemical classes.
Main Methods:
- Utilized a compendium of RNA sequencing data from 48-h post fertilization zebrafish.
- Inferred a gene co-expression network based on transcriptional responses.
- Analyzed network changes after systematic removal of chemical classes.
Main Results:
- FRCs and AHR2 activators induced distinct gene expression patterns.
- FRCs primarily affected neurobehavioral pathways, while AHR2 activators targeted chemical stress responses.
- Identified specific genes, including cyp1a, within the AHR2 signaling pathway.
- Discovered associations between FRCs and neurogenesis, and both chemical classes and vascular development.
- Identified potential biomarkers for chemical exposure.
Conclusions:
- Developed the first zebrafish chemical-specific gene co-expression network.
- Illuminated differential transcriptomic alterations caused by various chemicals.
- The network serves as a valuable resource for future chemical toxicity mechanism studies.
