Influence of 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3 on expression of P-glycoprotein and cytochrome P450 3A in sheep

Influence of 25-hydroxyvitamin D3 and 1,25-dihydroxyvitamin D3 on expression of P-glycoprotein and cytochrome P450 3A in sheep
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25-羟基维生素D3和1,25-二羟基维生素D3对绵羊P-糖蛋白和细胞色素P450 3A表达的影响

DOI:
10.1016/j.jsbmb.2015.08.019
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发表时间:
2015
期刊:
The Journal of Steroid Biochemistry and Molecular Biology
影响因子:
--
通讯作者:
Lifschltz
Lifschltz
中科院分区:
--
文献类型:
--
作者:
Wilkens;Schnepel;Klinger;Muscher-Banse;Ballent;VIrkel;Lifschltz

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为了改善钙磷平衡,肉牛和奶牛可以补充维生素D。然而,不同的维生素D代谢产物已被证明可以增加啮齿类动物以及细胞培养系统中P-糖蛋白(P-gp、MDR 1、ABCB 1)和细胞色素P450 3A(CYP 3A)的表达。由于这些干扰可能会影响某些兽药中广泛使用的药物的药代动力学,我们研究了P-gp,CYP 3A,维生素D受体(VDR),绵羊经口给予6 μg/kg体重(BW)25-羟基维生素D3(OHD 3)后,处死前10天或静脉注射0.5 μg/kg BW 1,25-二羟基维生素D3(1,25-(OH)2D 3)后12 h。25-OHD 3的补充可下调瘤胃、空肠和肝脏的P-gp,但不影响肾脏的P-gp。有趣的是,在1,25-(OH)2D 3处理的绵羊组织中未观察到对P-gp的这种影响。相比之下,1,25-(OH)2D 3诱导肾脏和空肠CYP 3A表达显著上调,而25-OHD 3无影响。肾脏的VDR和PXR的表达也增加了治疗与1,25-(OH)2D 3,而空肠PXR的表达只刺激羊补充25-OHD 3。两种处理均增加了肾脏RXR α的表达,但未增加瘤胃、空肠或肝脏RXRα的表达。这些结果表明,大剂量维生素D代谢物对不同靶器官的影响以及与其他药物的潜在相互作用应进一步在体外和体内研究,以了解维生素D代谢物对牲畜代谢和排泄途径的影响。
In order to improve calcium and phosphorus balance, beef cattle and dairy cows can be supplemented with vitamin D. However, different vitamin D metabolites have been shown to increase expression of P-glycoprotein (P-gp, MDR1, ABCB1) and cytochrome P450 3A (CYP3A) in rodents as well as in cell culture systems. As such interferences might have an impact on pharmacokinetics of some drugs widely-used in veterinary medicine, we investigated the expression of P-gp, CYP3A, vitamin D receptor (VDR), pregnane X receptor (PXR) and retinoid X receptor α (RXRα) in sheep either treated orally with 6 μg/kg body weight (BW) 25-hydroxyvitamin D3 (OHD3) for ten days before sacrifice or 12 h after intravenous injection of 0.5 μg/kg BW 1,25-dihydroxyvitamin D3 (1,25- (OH)2D3). Down-regulation of ruminal, jejunal and hepatic, but not renal P-gp could be found with 25-OHD3 supplementation. Interestingly, this effect on P-gp was not observed in tissues from 1,25-(OH)2D3-treated sheep. In contrast, 1,25-(OH)2D3 induced a significant up-regulation of renal and jejunal CYP3A expression, while 25-OHD3 had no impact. Renal expression of VDR and PXR was also increased by treatment with 1,25-(OH)2D3, while jejunal PXR expression was only stimulated in sheep supplemented with 25-OHD3. Either treatments increased renal, but not ruminal, jejunal or hepatic expression of RXRα. These results demonstrate that the impact of large doses of vitamin D metabolites on different target organs and potential interactions with other medications should be further investigated in vitro and in vivo to understand the effects of vitamin D metabolites on metabolism and excretion pathways in livestock.
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