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Updated: May 22, 2025
Primary Endodermal Epithelial Cell Culture from the Yolk Sac Membrane of Japanese Quail Embryos
Published on: March 10, 2016
Study on yolk iron transportation in chick embryo eggs based on transcriptomics.
Lulu Ma1, Zhaowei Cui2, Shuaishuai Wei1
1Engineering Research Center of Bio-process, Ministry of Education/ School of Food and Biological Engineering, Hefei University of Technology, Hefei 230601, China; Key Laboratory for Agricultural Products Processing of Anhui Province/Key Laboratory for Animal Food Green Manufacturing and Resource Mining of Anhui Province, Hefei 230601, China.
Chick embryos utilize a complete iron system for rapid absorption. From day 9 to 12, divalent metal transporter 1 (DMT1) and ferritin heavy chain 1 (FTH1) are crucial for initiating iron transport during incubation.
Area of Science:
- Developmental Biology
- Nutritional Science
- Molecular Biology
Background:
- Chick embryos possess a comprehensive system for iron metabolism, making them an ideal model for studying iron transport and absorption.
- Understanding iron regulation during embryonic development is critical for avian health and nutrition.
Purpose of the Study:
- To investigate the regulatory genes and pathways involved in iron transportation and uptake during key stages of chick embryo development (E6, E9, E12, E15).
- To identify critical periods and molecular players in embryonic iron acquisition.
Main Methods:
- Transcriptome analysis was performed on chick embryos at days 6, 9, 12, and 15 of incubation.
- Iron content was measured in egg yolk, embryo, and yolk sac membrane (YSM).
- Gene expression levels of key iron-related transporters and storage proteins were analyzed.
Main Results:
- Iron content decreased in the yolk while increasing in the embryo, with a transient peak in the YSM at E12.
- Transcriptome analysis revealed 87,499 expressed genes, with stage-specific gene expression patterns.
- Mineral absorption pathways were significantly enriched from E9 to E15.
- Expression of divalent metal transporter 1 (DMT1) and ferritin heavy chain 1 (FTH1) increased significantly from E9 to E12.
- Genes such as Heme oxygenase 1 (HMOX1), FTH1, Solute Carrier Family 40 Member 1 (SLC40A1), and hephaestin (HEPH) were upregulated from E12 to E15.
Conclusions:
- The period between embryonic days 9 and 12 represents a crucial phase for iron initiation and transport.
- DMT1 and FTH1 are key regulators of iron transport initiation in early chick embryonic development.
- The study elucidates the dynamic changes and molecular mechanisms governing iron homeostasis during chick embryogenesis.
