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Updated: Aug 10, 2026
Primary Endodermal Epithelial Cell Culture from the Yolk Sac Membrane of Japanese Quail Embryos
Published on: March 10, 2016
Induction of normal cardiovascular development in the vitamin A-deprived quail embryo by natural retinoids
1Department of Food Science & Human Nutrition, Michigan State University, East Lansing 48824-1224.
Insights
All-trans-retinoic acid is vital for normal cardiovascular development in avian embryos. Its optimal administration window is within the first 22-28 hours of incubation for successful development.
Area of Science:
- Developmental Biology
- Embryology
- Nutritional Biochemistry
Background:
- Vitamin A is crucial for embryonic development, particularly cardiovascular formation.
- Specific retinoid forms and their precise developmental timing are not fully understood.
- Understanding these factors is key to preventing congenital cardiovascular defects.
Purpose of the Study:
- To investigate the biological activity of various natural retinoids on cardiovascular development in vitamin A-deprived quail embryos.
- To determine the critical time window for vitamin A activity during avian embryogenesis.
- To identify the specific active form of vitamin A essential for normal cardiovascular development.
Main Methods:
- Vitamin A-deprived Japanese quail embryos were used to assess retinoid biological activity.
- Different natural retinoids (retinol, retinoic acid isomers) were administered at specific incubation time points.
- Cardiovascular development was evaluated based on the percentage of embryos with normal development post-treatment.
Main Results:
- All-trans-retinoic acid, administered between 22-28 hours of incubation (optimal at 24 hours), induced normal cardiovascular development in 20-34% of embryos.
- Retinol (1 microgram) at initial incubation led to 97% normal development, while retinoic acid was toxic at this dose.
- Other retinoids and later administration times showed significantly reduced or no biological activity.
Conclusions:
- All-trans-retinoic acid is identified as the biologically active form of vitamin A for avian cardiovascular development.
- A critical developmental window exists within the first 22-28 hours of quail embryogenesis for all-trans-retinoic acid to initiate normal cardiovascular development.
- These findings highlight the importance of precise retinoid signaling during early embryonic stages.
Abstract:
The biological activity of various natural retinoids and the time "window" when vitamin A activity is required for normal cardiovascular development were examined in vitamin A-deprived Japanese quail embryos. The administration of 1 microgram of retinol at the beginning of incubation resulted in normal cardiovascular development in 97% of embryos; retinoic acid was toxic at this dose level. Treatment of embryos with 0.1 microgram of all-trans-retinol or 13-cis-retinoic acid at the beginning of incubation resulted in normal cardiovascular development in 47 and 12% of embryos, respectively; administration of these retinoids at other time points attenuated the percentage of embryos with normal cardiovascular development. Didehydroretinol, 0.1 microgram, and 9-cis-retinoic acid, 0.1 microgram, were inactive at all time points examined; 9-cis-retinoic acid did not enhance the biological activity of all-trans-retinoic acid. All-trans-retinoic acid, 0.1 microgram, administered during 22-28 hr of incubation induced normal cardiovascular development in 20-34% of embryos; biological activity was optimal when it was administered at 24 hr. All retinoids tested were inactive in establishing normal cardiovascular development when administered at 36 hr of incubation or later. The studies suggest that all-trans-retinoic acid is the biologically active form of vitamin A required for normal cardiovascular development in the avian embryo. There is a critical time point within the first 22-28 hr of quail embryogenesis when all-trans-retinoic acid initiates events that lead to normal cardiovascular development.
