Analysis of Transcriptome and Differentially Expressed Genes in Chicken Primordial Germ Cells

Area of Science:

• Avian biology
• Genomics
• Developmental biology

Background:

• Successful primordial germ cell (PGC)-based genome editing demands a thorough understanding of their molecular identity.
• Defining the unique gene expression signature of PGCs is crucial for advancing germline editing technologies.

Purpose of the Study:

• To perform a comparative transcriptomic analysis of chicken PGCs and adult liver cells.
• To define the specific gene expression signature of chicken PGCs.
• To establish a refined molecular foundation for germline editing technologies.

Main Methods:

• Isolation and culture of primordial germ cells (PGCs) from Rhode Island Red chicken embryos.
• RNA sequencing of PGCs and adult liver tissue.
• Differential gene expression analysis using Benjamini-Hochberg correction.

Main Results:

• Identified 1909 differentially expressed genes (DEGs) between PGCs and liver cells.
• PGCs exhibit unique transcriptional profiles with enhanced proliferation and metabolic activity.
• PGCs show molecular convergence with neural crest cells, indicated by upregulated gene modules for migration, neuronal signaling, and neuro-lipid metabolism.

Conclusions:

• The study expands functional annotation of avian PGCs.
• Reveals an unexpected evolutionary recruitment of conserved morphogenetic programs in PGCs.
• Provides a refined molecular foundation for advanced germline editing technologies.