Concurrent assessment of hepatic and intestinal cytochrome P450 3A activities using deuterated alfentanil.

Concurrent assessment of hepatic and intestinal cytochrome P450 3A activities using deuterated alfentanil.
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DOI:
10.1038/clpt.2010.313
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发表时间:
2011-04
影响因子:
6.7
通讯作者:
--
中科院分区:
医学2区
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阿芬太尼是一种经验证的探针,用于肝脏,首过和肠细胞色素P450(P450)3A活性,使用血浆清除率,单点浓度和非侵入性瞳孔直径变化(瞳孔缩小)。评估静脉和口服药物处置通常需要分开给药。本研究评价了口服氘代和静脉注射未标记阿芬太尼的同时给药,以评估肠道和肝脏CYP 3A,并比较顺序和同时给药。在利福平、酮康唑和葡萄柚汁强烈诱导和抑制肝脏和/或肠道CYP 3A后,评价阿芬太尼的处置。使用血浆阿芬太尼浓度和曲线下面积、清除率或单点浓度,同时和顺序给药提供了等效的结果,并检测到肝和肠CYP 3A诱导和抑制。与同时给药相比,连续给药可更好地检测到瞳孔缩小对CYP 3A的调节。这些结果表明,同时口服氘代和静脉注射阿芬太尼,顺序或同时给药,是一种有效的和有效的方法来评估肝脏和肠道CYP 3A活性。
Alfentanil is a validated probe for hepatic, first-pass, and intestinal cytochrome P450 (CYP) 3A activity, using plasma clearances, single-point concentrations and noninvasive pupil diameter change (miosis). Assessing intravenous and oral drug disposition typically requires separate dosing. This investigation evaluated concurrent administration of oral deuterated and intravenous unlabeled alfentanil, to assess both intestinal and hepatic CYP3A, and compare sequential and simultaneous dosing. Alfentanil disposition was evaluated after strong hepatic and/or intestinal CYP3A induction and inhibition by rifampin, ketoconazole, and grapefruit juice. Using plasma alfentanil concentrations and area under the curve, clearance, or single-point concentrations, both simultaneous and sequential dosing provided equivalent results and detected hepatic and intestinal CYP3A induction and inhibition. Miosis better detected CYP3A modulation with sequential vs simultaneous dosing. These results show that concurrent oral deuterated and intravenous alfentanil, administered either sequentially or simultaneously, is an efficient and effective approach to assessing hepatic and intestinal CYP3A activity.
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