Abstract
Vitamin A derivatives (retinoids) play a key role in mammalian development and cell differentiation. Isomers of retinoic acid, the main active metabolite of vitamin A, activate retinoid receptors that act as ligand-dependent transcription factors and affect gene expression. White and brown adipose tissues are major sites of storage of vitamin A derivatives and they play an active role in whole body metabolism of retinoids. Moreover, adipose tissues are targets for the action of retinoic acid. In most cases retinoic acid impairs adipocyte differentiation although its final effects on adipose tissue development depend on retinoic acid concentration, isomers availability andexpression of retinoid receptor subtypes in the white or brown adipocyte. Retinoic acid (RA) has a specific effect on brown adipose tissue, because it activates transcription of the gene for uncoupling protein-1, responsible for brown fat thermogenesis.
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Villarroya, F., Giralt, M. & Iglesias, R. Retinoids and adipose tissues: metabolism, cell differentiation and gene expression. Int J Obes 23, 1–6 (1999). https://doi.org/10.1038/sj.ijo.0800799
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DOI: https://doi.org/10.1038/sj.ijo.0800799
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