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Pterostilbene supplements carry the risk of drug interaction via inhibition of UDP-glucuronosyltransferases (UGT) 1A9 enzymes
Toxicology Letters ( IF 2.9 ) Pub Date : 2020-03-01 , DOI: 10.1016/j.toxlet.2019.12.008
Lili Jiang 1 , Zhongmin Zhang 1 , Yangliu Xia 1 , Zhen Wang 1 , Xiaoyu Wang 1 , Shujuan Wang 1 , Zhe Wang 1 , Yong Liu 1
Affiliation  

Pterostilbene (PT) is a natural stilbene common in small berries and food supplements, possessing numerous pharmacological activities. However, whether PT can affect the activities of UDP-glucuronosyltransferases (UGT) enzymes remains unclear. The aim of the present study was to investigate the effect of PT on UGT activities and to quantitatively evaluate the food-drug interaction potential due to UGT inhibition. Our data indicated that PT exhibited potent inhibition against HLM, UGT1A6, UGT1A9, UGT2B7, and UGT2B15, moderate inhibition against UGT1A1, UGT1A3, UGT1A8, and UGT2B4, negligible inhibition against UGT1A4, UGT1A7, UGT1A10, and UGT2B17. Further kinetic investigation demonstrated that PT exerted potent noncompetitive inhibition 4-MU glucuronidation by UGT1A9, with IC50 and Ki values of 0.92 µM and 0.52 ± 0.04 μM, respectively. Quantitative prediction study suggested that coadministration of PT supplements at 100 mg/day or higher doses may result in at least a 50% increase in the AUC of drugs predominantly cleared by UGT1A9. Thus, the coadministration of PT supplements and drugs primarily cleared by UGT1A9 may result in potential drug interaction, and precautions should be taken when coadministration of PT supplements and drugs metabolized by UGT1A9.

中文翻译:

紫檀芪补充剂通过抑制 UDP-葡萄糖醛酸转移酶 (UGT) 1A9 酶而带来药物相互作用的风险

紫檀 (PT) 是一种常见于小浆果和食品补充剂中的天然芪,具有多种药理活性。然而,PT 是否可以影响 UDP-葡萄糖醛酸转移酶 (UGT) 酶的活性仍不清楚。本研究的目的是研究 PT 对 UGT 活性的影响,并定量评估 UGT 抑制引起的食物-药物相互作用潜力。我们的数据表明 PT 对 HLM、UGT1A6、UGT1A9、UGT2B7 和 UGT2B15 表现出强效抑制作用,对 UGT1A1、UGT1A3、UGT1A8 和 UGT2B4 表现出中度抑制作用,对 UGT1A4、UGT1A7、UGT1A10 和 UGT2B4 的抑制作用可以忽略不计。进一步的动力学研究表明,PT 通过 UGT1A9 对 4-MU 葡萄糖醛酸化产生有效的非竞争性抑制,IC50 和 Ki 值分别为 0.92 μM 和 0.52 ± 0.04 μM。定量预测研究表明,联合使用 100 毫克/天或更高剂量的 PT 补充剂可能导致主要由 UGT1A9 清除的药物的 AUC 至少增加 50%。因此,PT 补充剂与主要由 UGT1A9 清除的药物共同给药可能会导致潜在的药物相互作用,当 PT 补充剂与 UGT1A9 代谢的药物共同给药时应采取预防措施。
更新日期:2020-03-01
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