Related Experiment Videos
Protein synthesis measured in the whole body of chick embryos cultured in vitro
K Kita1, S Nakagawa, R Pinontoan
1Laboratory of Animal Nutrition, School of Agriculture, Nagoya University, Japan.
Insights
This study developed a reliable in vitro method to measure whole body protein synthesis in chick embryos. Bovine insulin did not impact protein synthesis rates in these cultured embryos.
Area of Science:
- Developmental Biology
- Biochemistry
- Animal Science
Background:
- Accurate measurement of protein synthesis is crucial for understanding growth and development.
- Chick embryos offer a valuable model for studying early developmental processes.
- In vitro culture methods allow for controlled experimental conditions.
Purpose of the Study:
- To establish and validate an in vitro method for measuring whole body protein synthesis in chick embryos.
- To assess the influence of bovine insulin on protein synthesis rates in developing chick embryos.
Main Methods:
- Chick embryos (day 7 incubation) were cultured in vitro for 60 minutes in serum-free medium.
- Radioactive 4-[3H]phenylalanine was used to trace protein synthesis.
- Specific radioactivities of free and protein-bound phenylalanine were measured.
Main Results:
- The fractional synthesis rate (FSR) of protein was consistently estimated between 35-40%/day across multiple time points (20-60 min).
- This consistency suggests the in vitro method is a reliable model for studying growth promoters.
- Bovine insulin administration did not significantly alter the FSR of protein in the cultured chick embryos.
Conclusions:
- The developed in vitro culture method provides a robust model for assessing protein synthesis in chick embryos.
- This model can be utilized to investigate the effects of various growth-promoting agents.
- Bovine insulin does not appear to influence whole body protein synthesis in chick embryos under these experimental conditions.
Abstract:
1. Whole body protein synthesis was measured in chick embryos cultured in vitro. On day 7 of incubation chick embryos were cultured for 60 min in synthetic serum-free medium containing 4-[3H]phenylalanine. Specific radioactivities in free and protein-bound phenylalanine in the whole embryo were measured, starting 2 min after commencement of the culture process. 2. The values for fractional synthesis rate (FSR) estimated in vitro at 20, 30, 45 and 60 min during the embryo culture agreed well, ranging from 35 to 40%/d, suggesting that the method would serve as a useful model for studying the effect of growth promoters in chick embryos. 3. Bovine insulin in the synthetic medium did not affect FSR of protein in chick embryos cultured in vitro.