Meta-Analysis and Mechanism-Based Modeling of Synovial and Plasma Pharmacokinetics and Adrenal Suppression Following Intra-Articular Injection of Methylprednisolone Acetate in Horses.

IF 1.5 4区 农林科学 Q3 PHARMACOLOGY & PHARMACY
Ruihong Yu, William J Jusko
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引用次数: 0

Abstract

This study assesses the pharmacokinetics (PK) of published methylprednisolone (MPL) data in horses following intra-articular (IA) administration of MPL acetate (MPA) and the associated adrenal suppression. The concentrations of MPL/MPA in synovial fluid, blood, and urine, as well as hydrocortisone (HC) in plasma, were digitized from multiple sources in the literature. A minimal physiologically based pharmacokinetic model and a linked indirect response model with a circadian rhythm baseline were applied. Concentrations of MPA in joints followed a triexponential decay, converting to MPL. The clearance of MPL was 797 mL/h/kg via hepatic metabolism (93%) and renal excretion (7%). The persistence of MPL in synovium and plasma for over 500 h was primarily ascribed to slow prodrug dissolution. The formation of MPL from available MPA in SF was rapid. A transit step was needed between the synovium and plasma for MPL absorption. The MPA to MPL bioavailability was dose and/or study dependent; 100% for dosages below 100 mg and 58% for 200 mg. The MPL inhibition of HC production was potent, with an IC50 of 0.83 ng/mL, and lasted over 50 h. This meta-analysis utilizing a mechanistic modeling approach provided advanced and comprehensive insights on IA MPL PK in horses and was translatable for the PK appreciation of IA MPA dosing in man.

马关节内注射醋酸甲基强的松龙后滑膜和血浆药代动力学及肾上腺抑制的meta分析和基于机制的建模。
本研究评估了甲基强的松龙(MPL)在马关节内(IA)给予MPL醋酸酯(MPA)和相关肾上腺抑制后的药代动力学(PK)。滑液、血液和尿液中的MPL/MPA浓度,以及血浆中的氢化可的松(HC)浓度,从文献中多个来源进行数字化。一个最小的基于生理的药代动力学模型和一个与昼夜节律基线相关的间接反应模型被应用。节理中MPA浓度呈三指数衰减,转化为MPL。MPL通过肝代谢(93%)和肾排泄(7%)清除率为797 mL/h/kg。MPL在滑膜和血浆中持续超过500小时的主要原因是药前溶解缓慢。SF中有效MPA快速形成MPL。在滑膜和等离子体之间需要一个过渡步骤来吸收MPL。MPA对MPL的生物利用度是剂量和/或研究依赖的;100毫克以下100%,200毫克58%。MPL对HC的抑制作用显著,IC50为0.83 ng/mL,抑制时间超过50 h。该荟萃分析利用机制建模方法提供了马体内IA MPA PK的先进和全面的见解,并可翻译为人体内IA MPA剂量的PK评估。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
CiteScore
3.10
自引率
15.40%
发文量
69
审稿时长
8-16 weeks
期刊介绍: The Journal of Veterinary Pharmacology and Therapeutics (JVPT) is an international journal devoted to the publication of scientific papers in the basic and clinical aspects of veterinary pharmacology and toxicology, whether the study is in vitro, in vivo, ex vivo or in silico. The Journal is a forum for recent scientific information and developments in the discipline of veterinary pharmacology, including toxicology and therapeutics. Studies that are entirely in vitro will not be considered within the scope of JVPT unless the study has direct relevance to the use of the drug (including toxicants and feed additives) in veterinary species, or that it can be clearly demonstrated that a similar outcome would be expected in vivo. These studies should consider approved or widely used veterinary drugs and/or drugs with broad applicability to veterinary species.
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