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Molecular and dietary regulation of beta,beta-carotene 15,15'-monooxygenase 1 (BCMO1)

Lookup NU author(s): Professor Georg Lietz, Jennifer Lange


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beta,beta-Carotene 15,15'-monooxygenase-1 (BCMO1) is a key enzyme in vitamin A metabolism in mammals. Various dietary components such as non-pro-vitamin A carotenoids, fat, and polyphenols have been shown to influence the intestinal absorption and conversion of pro-vitamin A carotenoids. Furthermore, vitamin A deficiency has been shown to induce BCMO1 expression, whereas supplementation with vitamin A or its active metabolites, all-trans and 9-cis retinoic acid, dose-dependently reverse these effects. A diet-responsive regulatory network involving the intestine specific homeodomain transcription factor ISX has been shown to regulate the intestinal vitamin A uptake and production via a negative feedback control. Furthermore, non-synonymous single nucleotide polymorphisms in the human BCMO1 gene have been discovered causing observably reduced BCMO1 activity. Detailed knowledge about BCMO1 regulation as well as genetic variations causing variable cleavage activities may provide a background, on which individual and/or population based dietary recommendations for beta-carotene and vitamin A intake could be established.

Publication metadata

Author(s): Lietz G, Lange J, Rimbach G

Publication type: Review

Publication status: Published

Journal: Archives of Biochemistry and Biophysics

Year: 2010

Volume: 502

Issue: 1

Pages: 8-16

Print publication date: 01/07/2010

ISSN (print): 0003-9861

ISSN (electronic): 1096-0384


DOI: 10.1016/

PubMed id: PMID: 20599666