Glucuronidation of all-trans-retinoic acid in liposomal membranes.
Glucuronidation of all-trans-retinoic acid in liposomal membranes.
复制标题
脂质体膜中全反式视黄酸的葡萄糖醛酸化。
DOI:
10.1016/0005-2736(93)90265-2
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发表时间:
1993
期刊:
影响因子:
--
通讯作者:
Zile,MH
中科院分区:
文献类型:
--
作者:
Salyers,KL;Cullum,ME;Zile,MH
Retinoyl β-d-glucuronide is a biologically active metabolite of retinoic acid. The kinetics of UDP-glucuronosyltransferase-catalyzed biosynthesis of retinoyl β-d-glucuronide was examined in rat liver and intestinal native microsomes incubated with [3 H] retinoic acid incorporated into liposomes. The product was identified by cochromatography with authentic all-trans retinoyl β-d-glucuronide, by hydrolysis with β-d-glucuronidase, and by mass spectrometry. In vitamin A-sufficient rats the apparent K m values for all-trans-retinoic acid were 173 μM and 125 μM, and the apparent V max, 62 and 41 pmol/min per mg, for small intestinal and liver microsomes, respectively. In vitamin A-deficient rats repleted with all-trans-retinyl acetate, the apparent K m (91 μM) and V max (53 pmol/min per mg) for intestinal microsomes were in range of those of vitamin A-sufficient rats. The similarities in the kinetic parameters for UDP-glucuronosyltransferase in small intestinal mucosa and liver suggest that the reactions are catalyzed by the same enzyme. In vitamin A-deficient rats given a large amount all-trans-retinoic acid (1.2 mmol/day for 3 days) the apparent K m was 105 μM and V max, 127 pmol/min per mg of intestinal microsomal protein. We conclude that the kinetics of intestinal retinoic acid glucuronidation are not characteristic of simple detoxification reactions. Retinoyl glucuronide may be important in mediating retinoic acid metabolism and function.
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DOI:
--
发表时间:
1986
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Whitmer,DI;Russell,PE;Ziurys,JC;Gollan,JL
通讯作者:
Gollan,JL
DOI:
--
发表时间:
1978
期刊:
影响因子:
--
作者:
J. Schenkman;D. L. Cinti
通讯作者:
D. L. Cinti
DOI:
--
发表时间:
1986
期刊:
影响因子:
--
作者:
Duncan A. Miller;H. DeLuca
通讯作者:
H. DeLuca
影响因子:
3.3
作者:
J. Claustre;R. Favre;J. Cottet;L. Peyrin
通讯作者:
L. Peyrin
影响因子:
6.5
作者:
K. Lippel;J. Olson
通讯作者:
J. Olson