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Changes in plasma amino acids in the developing chick
Biology of the Neonate
|January 1, 1986
Insights
Chicken embryo plasma amino acid levels peak mid-gestation and then decline before hatching. Post-hatching, most amino acids decrease, but aspartate, glutamate, and taurine concentrations significantly increase.
Area of Science:
- Developmental Biology
- Biochemistry
- Avian Physiology
Background:
- Amino acids are crucial for embryonic development and metabolic processes.
- Understanding plasma amino acid dynamics is key to assessing developmental health.
- Chicken embryos provide a valuable model for studying vertebrate development.
Purpose of the Study:
- To investigate the developmental changes in plasma amino acid concentrations in chicken embryos.
- To identify specific amino acids that exhibit significant fluctuations during embryonic development and post-hatching.
- To establish a reference profile for plasma amino acids in developing chickens.
Main Methods:
- Arterial blood sampling from chicken embryos at various developmental stages.
- Quantitative analysis of plasma amino acid concentrations using established biochemical assays.
- Comparative analysis of amino acid levels from mid-gestation through to post-hatching.
Main Results:
- Plasma amino acid concentrations showed a dynamic pattern, peaking around day 16 of gestation.
- A general decline in most amino acids was observed as hatching approached.
- Post-hatching, aspartate, glutamate, and taurine demonstrated a significant rise in plasma concentrations.
Conclusions:
- Plasma amino acid profiles undergo significant, stage-specific changes during chicken embryonic development.
- The observed increases in aspartate, glutamate, and taurine post-hatching suggest their critical roles in early post-hatchling life.
- These findings contribute to a deeper understanding of avian metabolic adaptations during development.
Abstract:
We have sampled arterial blood from chicken embryos during development and measured the changes in plasma amino acids from mid-gestation to hatching. During gestation, several amino acids rise to a peak concentration at 16 days and fall prior to hatching. After hatching, most amino acids fall, although the plasma concentrations of aspartate, glutamate and taurine rise significantly.