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Transcriptional Profiling of Primordial Germ Cells During Chicken Embryonic Development
Mingyang Jin1, Jingkang Huang1, Chao Qin1
1Shanghai Key Laboratory of Veterinary Biotechnology, Department of Animal Science, School of Agriculture and Biology, Shanghai Jiao Tong University, Shanghai 200240, China.
Veterinary Sciences
|July 28, 2026
Summary
This study characterized chicken primordial germ cells (PGCs) using RNA sequencing, revealing stage- and sex-associated gene expression differences. Findings offer insights into PGC development and potential biotechnological applications in poultry.
Area of Science:
- Poultry genetics and developmental biology.
- Cellular and molecular biology.
Background:
- Primordial germ cells (PGCs) are crucial for avian reproduction, germplasm conservation, and genetic modification.
- Understanding PGC development, migration, and sex differentiation is vital for poultry biotechnology.
Purpose of the Study:
- To characterize the transcriptomic landscape of chicken PGCs at different developmental stages (circulating and gonad-derived).
- To identify stage- and sex-associated transcriptional programs influencing PGC development and colonization.
Main Methods:
- Isolation and RNA sequencing of circulating and gonad-derived PGCs from Silkie chicken embryos at 2.5 and 8.5 days of incubation.
- Comparative transcriptomic analysis to identify differentially expressed genes and pathways.
- Analysis of sex-biased gene expression related to W- and Z-linked chromosomes and autosomes.
Main Results:
- Significant stage-associated differences were observed in pathways like cell-matrix interaction, focal adhesion, PI3K-Akt signaling, and stem cell pluripotency.
- Sex-biased gene expression was detected early (circulating PGCs) and increased after gonadal colonization, with more autosomal genes involved.
- Candidate genes (e.g., HINTW, DMRT1, SOX2) and pathways (e.g., ECM-receptor interaction, calcium signaling) were identified for future research.
Conclusions:
- The study provides a descriptive transcriptomic resource for chicken PGC biology and biotechnology.
- Identified genes and pathways offer potential targets for understanding PGC development and sex differentiation.
- Further functional studies are needed to establish causal mechanisms due to the descriptive nature of the findings.
