Transcriptome analysis identifies key regulatory genes and temporal expression dynamics during embryonic development...

Area of Science:

• Marine Biology
• Developmental Biology
• Genomics

Background:

• The Japanese eel (Anguilla japonica) is commercially vital but faces severe population decline.
• Artificial breeding is hindered by limited understanding of embryonic molecular regulation.

Purpose of the Study:

• To comprehensively analyze gene expression dynamics during Japanese eel embryogenesis.
• To identify key molecular mechanisms and regulatory networks governing early development.

Main Methods:

• RNA-sequencing (RNA-Seq) was performed on eight key embryonic stages.
• Differentially expressed genes (DEGs) were identified and analyzed.
• Weighted gene co-expression network analysis (WGCNA) was employed.

Main Results:

• 16,728 DEGs were identified, with significant changes in pluripotency and differentiation.
• Stage-specific pathways (Notch, Wnt, Cell cycle, ECM-receptor interaction, Calcium signaling) were revealed.
• Four stage-specific gene modules and key transcription factors (Sox, Hox, Wnt) were identified.

Conclusions:

• This study provides a detailed molecular landscape of Japanese eel embryogenesis.
• The findings establish a foundational transcriptomic resource for understanding and improving artificial reproduction.
• Identified regulatory networks offer targets for future research in eel developmental biology.