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Related Concept Videos

Role of Skin in Vitamin D Synthesis01:23

Role of Skin in Vitamin D Synthesis

The skin plays a crucial role in the synthesis of vitamin D, a vital nutrient for various physiological processes in the body. Vitamin D is unique because it can be synthesized in the skin through a series of chemical reactions triggered by exposure to ultraviolet B (UVB) radiation from sunlight.
The solar UV B rays (290-315 nm) are absorbed by the skin, and 7-dehydrocholesterol (provitamin D3) photolyzes it to previtamin D3, which undergoes a rapid transformation to vitamin D3(cholecalciferol).
Role of Vitamins in Maintaining Bone Health01:25

Role of Vitamins in Maintaining Bone Health

The growth and maintenance of bone are regulated by a combination of nutritional factors, including vitamins, such as vitamin A, B12, C, D, and K.
Vitamin A
Vitamin A is involved in the process of bone remodeling. Retinoic acid, the active metabolite of Vitamin A, has nuclear receptors in osteoblasts and osteoclasts, which are involved in bone remodeling.
Vitamin B12
Vitamin B12 acts as a cofactor during the formation of osteoblast-related proteins, such as osteocalcin. Vitamin B12 plays a role...
Lipid-derived Compounds in the Human Body01:31

Lipid-derived Compounds in the Human Body

Fats and lipids are crucial components in the human body. Some lipid-derived compounds, such as fat-soluble vitamins, eicosanoids, lipoproteins, and glycolipids, also play unique roles to support various  biological processes .
Fat-soluble Vitamins
Fat-soluble vitamins, including vitamins A, D, E, and K, are required in minimal quantities, but their deficiencies can lead to severely abnormal physiological conditions. For example, vitamin A deficiency can cause night blindness, dry skin, delayed...
Development of the Sexual Organs in the Embryo and Fetus01:15

Development of the Sexual Organs in the Embryo and Fetus

Development of the reproductive organs in an embryo starts from a bipotential state. This means the early embryo can develop either male or female reproductive organs. The formation of these organs begins with the growth of gonadal ridges that arise from the intermediate mesoderm during the fifth week of development.
Near the gonadal ridges, two duct systems are present: the mesonephric ducts (Wolffian ducts) and paramesonephric ducts (Müllerian ducts). These ducts form the basis for the male...
Gonadal and Placental Hormones01:24

Gonadal and Placental Hormones

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Teratogenicity01:07

Teratogenicity

The ability of a drug to produce structural deformations and functional abnormalities in the developing embryo or the fetus is called teratogenicity, and the drug producing this effect is known as a teratogen. Teratogenic effects include stillbirth, miscarriage, intrauterine growth restriction, and neurocognitive delay. A teratogen may affect the embryo at different stages of development, which is important in determining the type and extent of the damage. During blastocyst formation, the early...

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Related Experiment Video

Updated: May 25, 2026

Quantitative Analysis of Dietary Vitamin A Metabolites in Murine Ocular and Non-Ocular Tissues Using High-Performance Liquid Chromatography
05:03

Quantitative Analysis of Dietary Vitamin A Metabolites in Murine Ocular and Non-Ocular Tissues Using High-Performance Liquid Chromatography

Published on: December 27, 2024

Vitamin A in reproduction and development.

Margaret Clagett-Dame1, Danielle Knutson

  • 1Department of Biochemistry, University of Wisconsin-Madison, 433 Babcock Drive, Madison, WI 53706, USA. dame@biochem.wisc.edu

Nutrients
|January 19, 2012
PubMed
Summary

Vitamin A, specifically all-trans retinoic acid (RA), is crucial for reproduction and embryonic development. Its role is confirmed by studies reversing deficiency defects and analyzing receptor mutants, highlighting RA

Keywords:
retinoic acidembryonicvitamin A deficiency

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Methodology for Studying Interactions of Vitamin A Membrane Receptors and Opsin Protein with their Ligands in Generating the Retinylidene Protein
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Isolation of Lung Retinoid-Containing Cells by Cell Sorting
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Isolation of Lung Retinoid-Containing Cells by Cell Sorting

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Quantitative Analysis of Dietary Vitamin A Metabolites in Murine Ocular and Non-Ocular Tissues Using High-Performance Liquid Chromatography
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Isolation of Lung Retinoid-Containing Cells by Cell Sorting
07:47

Isolation of Lung Retinoid-Containing Cells by Cell Sorting

Published on: April 11, 2025

Area of Science:

  • Developmental Biology
  • Reproductive Biology
  • Nutritional Science

Background:

  • Vitamin A's role in reproduction and embryonic development recognized since the early 1900s.
  • Nutritional deficiency and genetic studies in rats and mice elucidated vitamin A's functions.
  • All-trans retinoic acid (RA) is identified as the active form of vitamin A for reproductive and developmental processes.

Purpose of the Study:

  • To summarize the established and emerging roles of vitamin A in reproduction and embryonic development.
  • To highlight the significance of all-trans retinoic acid (RA) as the key active metabolite.
  • To discuss the regulatory mechanisms, including CYP26 enzymes, and the use of genetic and nutritional approaches.

Main Methods:

  • Nutritional deficiency studies in animal models (rats).
  • Genetic studies in animal models (mice), including receptor knockout mutants.
  • Analysis of the effects of exogenous RA administration and carotene supplementation.
  • Investigation of CYP26 enzyme activity in regulating RA availability.

Main Results:

  • Vitamin A deficiency (VAD) impairs female reproduction before implantation and causes developmental defects (vitamin A deficiency syndrome) if partially rescued.
  • RA administration can reverse most reproductive and developmental blocks caused by VAD.
  • Vitamin A is essential for male reproductive tract maintenance and spermatogenesis.
  • RA signaling initiates meiosis in both female and male gonads during specific developmental windows.

Conclusions:

  • All-trans retinoic acid (RA) is indispensable for successful reproduction and normal embryonic development.
  • CYP26 enzymes play a critical role in controlling tissue-specific RA access, explaining rescue effects.
  • Further research using nutritional and genetic methods is ongoing to fully understand vitamin A-dependent pathways.