Title : Regulation of hepatic retinol metabolism: perspectives from studies on vitamin A status.

Pub. Date : 2004 Jan

PMID : 14704332






10 Functional Relationships(s)
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Compound Name
Protein Name
Organism
1 Lecithin:retinol acyltransferase (LRAT), a microsomal enzyme present in liver and several other retinol-metabolizing tissues, esterifies retinol that is associated with a cellular retinol-binding protein, CRBP or CRBP-II. Vitamin A lecithin retinol acyltransferase Homo sapiens
2 Lecithin:retinol acyltransferase (LRAT), a microsomal enzyme present in liver and several other retinol-metabolizing tissues, esterifies retinol that is associated with a cellular retinol-binding protein, CRBP or CRBP-II. Vitamin A lecithin retinol acyltransferase Homo sapiens
3 Lecithin:retinol acyltransferase (LRAT), a microsomal enzyme present in liver and several other retinol-metabolizing tissues, esterifies retinol that is associated with a cellular retinol-binding protein, CRBP or CRBP-II. Vitamin A lecithin retinol acyltransferase Homo sapiens
4 Lecithin:retinol acyltransferase (LRAT), a microsomal enzyme present in liver and several other retinol-metabolizing tissues, esterifies retinol that is associated with a cellular retinol-binding protein, CRBP or CRBP-II. Vitamin A lecithin retinol acyltransferase Homo sapiens
5 Lecithin:retinol acyltransferase (LRAT), a microsomal enzyme present in liver and several other retinol-metabolizing tissues, esterifies retinol that is associated with a cellular retinol-binding protein, CRBP or CRBP-II. Vitamin A lecithin retinol acyltransferase Homo sapiens
6 In vitamin A-deficient liver, both LRAT mRNA and activity are significantly down-regulated as well as rapidly induced after the administration of vitamin A or its principal hormonal metabolite, retinoic acid (RA). Vitamin A lecithin retinol acyltransferase Homo sapiens
7 In long-term feeding studies and the metabolic steady state, liver LRAT is expressed dose-dependently across a wide range of dietary vitamin A. Vitamin A lecithin retinol acyltransferase Homo sapiens
8 Based on these results, we propose that LRAT and CYP26 serve as two molecular mechanisms, coordinately regulated by all-trans-RA, to control the availability of retinol and RA, respectively. Vitamin A lecithin retinol acyltransferase Homo sapiens
9 The LRAT reaction, besides providing a readily retrievable storage form of vitamin A, may regulate the availability of retinol to other pathways, while the CYP26 reaction may serve to prevent a detrimental "overshoot" of RA concentration. Vitamin A lecithin retinol acyltransferase Homo sapiens
10 The LRAT reaction, besides providing a readily retrievable storage form of vitamin A, may regulate the availability of retinol to other pathways, while the CYP26 reaction may serve to prevent a detrimental "overshoot" of RA concentration. Vitamin A lecithin retinol acyltransferase Homo sapiens