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Vitamin A and embryonic development: an overview

M H Zile1

  • 1Department of Food Science and Human Nutrition, Michigan State University, East Lansing 48824-1224.

The Journal of Nutrition
|March 21, 1998
PubMed
Summary
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Vitamin A is crucial for embryonic development, with its deficiency causing congenital malformations. Studies in vitamin A-deficient embryos reveal its vital role in heart, nervous system, and circulatory development.

Area of Science:

  • Developmental Biology
  • Molecular Biology
  • Nutritional Science

Background:

  • Vitamin A is essential for all life stages, with its active form, retinoic acid, regulating development via retinoid receptors.
  • Both vitamin A deficiency and excess during embryonic development can lead to congenital malformations.
  • Understanding retinoid signaling is key to comprehending embryonic development.

Purpose of the Study:

  • To investigate the physiological function of vitamin A in embryonic development using a vitamin A-deficient avian embryo model.
  • To identify specific developmental processes and genes regulated by endogenous vitamin A.
  • To elucidate the role of retinoid biogeneration pathways in initiating signal transduction during embryogenesis.

Main Methods:

  • Utilizing a vitamin A-deficient avian embryo model to study early development.

Related Experiment Videos

  • Employing bioactive retinoids to rescue deficient genotypes and phenotypes.
  • Identifying developmentally regulated genes influenced by endogenous vitamin A.

    • Main Results:

    • Established a clear link between vitamin A's physiological function and the development of the heart, central nervous system, and circulatory system.
    • Demonstrated vitamin A's role in regulating heart asymmetry.
    • Identified several key developmental genes regulated by vitamin A during early embryogenesis.
    • Confirmed the presence of retinoid receptors and active vitamin A forms in early embryos.

    Conclusions:

    • The vitamin A-deficient avian embryo model is effective for studying retinoid function in development.
    • Vitamin A is unequivocally essential for normal heart, nervous system, and circulatory development, including heart asymmetry.
    • Spatio-temporally regulated biogeneration of active vitamin A forms initiates critical retinoid signaling pathways during embryonic development.