Retinoids. A window into vertebrate development
1Department of Biology, University of South Florida.
Abstract:
Vitamin A is required for maintaining healthy epithelial tissues, e.g., skin and gut, normal reproductive capacity, and vision. Vitamin A deficiency also causes premalignant changes in epithelial tissues. These observations led to the use of retinoids (vitamin A-related compounds) in treating various skin diseases and more recently to inhibit cancer growth. Retinoids are extremely teratogenic to developing vertebrate embryos, a fact which limits their clinical usefulness. In particular, specific malformations of skeletal structures are often observed; for instance, retinoic acid induces craniofacial and limb deformities in avian and mammalian embryos. Recent technological advances have increased our understanding of how retinoids affect vertebrate development. Some newly discovered mechanisms underlying these actions are reviewed.
Insights
Vitamin A is crucial for healthy tissues and vision. However, retinoids, vitamin A derivatives, can cause severe birth defects, limiting their therapeutic use.
Area of Science:
- Developmental Biology
- Molecular Biology
- Toxicology
Background:
- Vitamin A is essential for epithelial tissue health, reproduction, and vision.
- Vitamin A deficiency can lead to premalignant changes in epithelial tissues.
- Retinoids, vitamin A derivatives, are used in treating skin diseases and cancer but are teratogenic.
Purpose of the Study:
- To review recent advances in understanding how retinoids affect vertebrate development.
- To explore the mechanisms underlying retinoid-induced developmental abnormalities.
Main Methods:
- Review of recent scientific literature and technological advancements.
- Analysis of studies on retinoid effects in avian and mammalian embryos.
Main Results:
- Retinoids are known teratogens, causing skeletal malformations like craniofacial and limb deformities.
- New mechanisms explaining retinoid teratogenicity in vertebrate development have been identified.
Conclusions:
- Understanding retinoid mechanisms is key to mitigating their teratogenic effects.
- Further research is needed to balance the therapeutic benefits of retinoids with their developmental risks.
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