Transcriptomic data meta-analysis reveals common and injury model specific gene expression changes in the...

Area of Science:

• Cardiovascular Research
• Regenerative Medicine
• Genomics

Background:

• Zebrafish exhibit remarkable heart regeneration, unlike humans who suffer cardiomyocyte loss after myocardial infarction.
• Transcriptomics aids in understanding zebrafish heart regeneration pathways and gene networks following injury.
• Existing studies lack a comparative database for injury-specific and core cardiac regeneration responses.

Approach:

• A meta-analysis of transcriptomic data from three zebrafish heart injury models (ventricular resection, cryoinjury, genetic ablation) at 7 days post-injury was performed.
• Differentially expressed genes (DEGs) and Gene Ontology Biological Processes (GO:BP) were analyzed across 36 reanalyzed samples.
• A user-friendly web interface was developed to visualize gene expression signatures and compare injury-specific networks.

Key Points:

• A common core of DEGs related to cell proliferation, Wnt signaling, and fibroblast enrichment was identified across all three injury models.
• Distinct gene signatures were observed for ventricular resection and genetic ablation, with a less pronounced signature for cryoinjury.
• The study emphasizes the importance of considering injury-specific gene regulatory networks in zebrafish cardiac regeneration research.

Conclusions:

• This meta-analysis provides a comprehensive comparison of transcriptomic responses to different heart injury models in zebrafish.
• The findings reveal both conserved and unique molecular mechanisms underlying zebrafish cardiac regeneration.
• The developed web resource facilitates further investigation into zebrafish cardiac repair and its translational potential.