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Integrated Metabolomic and Transcriptomic Analyses Reveal that Glutamine Promotes Chicken PGCLC Specification
Qingqing Geng1, Lei Zhang2, Zhe Wang1
1Yangzhou University, Yangzhou, China.
Animal Bioscience
|July 29, 2026
Summary
Glutamine fuels chicken primordial germ cell-like cell (PGCLC) development by altering metabolism and epigenetic marks. Supplementing with α-ketoglutarate rescues PGCLC formation when glutamine is limited.
Area of Science:
- Poultry Science
- Developmental Biology
- Metabolomics
Background:
- Primordial germ cells (PGCs) are crucial for poultry germline transmission and genetic conservation.
- Upstream metabolic and epigenetic regulatory mechanisms of PGC formation are not well understood.
Purpose of the Study:
- To characterize the metabolic landscape of chicken PGC formation.
- To identify metabolic regulators in BMP4-induced PGC-like cell (PGCLC) specification.
- To investigate the role of glutamine metabolism in PGCLC development.
Main Methods:
- Untargeted metabolomics and transcriptomics of chicken embryonic stem cells (ESCs) and PGCs.
- Integrated multi-omics analysis to identify differential metabolites and genes.
- Functional experiments involving glutamine deprivation and metabolite supplementation.
Main Results:
- 194 differentially expressed metabolites were identified, enriched in amino acid, nucleotide, energy, and antioxidant pathways.
- Glutamine metabolism, particularly the tricarboxylic acid (TCA) cycle metabolite α-ketoglutarate (α-KG), is critical for PGCLC specification.
- Glutamine deprivation inhibited PGCLC formation, disrupted metabolic balance, and altered H3K4me2 epigenetic modification; α-KG supplementation restored PGCLC efficiency.
Conclusions:
- Glutamine promotes chicken PGCLC specification via metabolic and epigenetic alterations (H3K4me2).
- Findings suggest a link between glutamine metabolism, α-KG, and epigenetic regulation in germ cell development.
- Provides insights into the metabolic basis of PGC formation and potential for improving PGC culture in poultry.
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