Target-Mediated Drug Disposition (TMDD) Revisited: High Versus Low-Affinity Approximations of the TMDD Model.

IF 3.1 3区 医学 Q2 PHARMACOLOGY & PHARMACY
Ronny Straube
{"title":"Target-Mediated Drug Disposition (TMDD) Revisited: High Versus Low-Affinity Approximations of the TMDD Model.","authors":"Ronny Straube","doi":"10.1002/psp4.70048","DOIUrl":null,"url":null,"abstract":"<p><p>Target-mediated drug disposition (TMDD) is often associated with high-affinity binding to a target resulting in nonlinear pharmacokinetics. For large molecules, such as monoclonal antibodies, this can lead to increased clearance at sub-saturating concentrations. However, for small molecules, target binding can protect the drug from a fast systemic clearance. Here, we show that both types of behaviors can be described by simple expressions arising from a high-affinity approximation of the standard TMDD model. Interestingly, the celebrated Michaelis-Menten (MM) approximation arises in the opposite limit of low affinity and if the systemic drug clearance is sufficiently slow. Our derivation contains a previously missing factor in front of the MM constant that becomes important when target and drug-target complex elimination rates are different. As a measure of target suppression, we also derive simple expressions for the free target to baseline ratio and compare our approximations with data from large and small molecules.</p>","PeriodicalId":10774,"journal":{"name":"CPT: Pharmacometrics & Systems Pharmacology","volume":" ","pages":""},"PeriodicalIF":3.1000,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"CPT: Pharmacometrics & Systems Pharmacology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1002/psp4.70048","RegionNum":3,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"PHARMACOLOGY & PHARMACY","Score":null,"Total":0}
引用次数: 0

Abstract

Target-mediated drug disposition (TMDD) is often associated with high-affinity binding to a target resulting in nonlinear pharmacokinetics. For large molecules, such as monoclonal antibodies, this can lead to increased clearance at sub-saturating concentrations. However, for small molecules, target binding can protect the drug from a fast systemic clearance. Here, we show that both types of behaviors can be described by simple expressions arising from a high-affinity approximation of the standard TMDD model. Interestingly, the celebrated Michaelis-Menten (MM) approximation arises in the opposite limit of low affinity and if the systemic drug clearance is sufficiently slow. Our derivation contains a previously missing factor in front of the MM constant that becomes important when target and drug-target complex elimination rates are different. As a measure of target suppression, we also derive simple expressions for the free target to baseline ratio and compare our approximations with data from large and small molecules.

靶介导药物处置(TMDD)再访:TMDD模型的高亲和力与低亲和力近似。
靶介导的药物处置(TMDD)通常与靶的高亲和力结合相关,导致非线性药代动力学。对于大分子,如单克隆抗体,这可能导致在亚饱和浓度下清除率增加。然而,对于小分子,靶标结合可以保护药物免于快速的全身清除。在这里,我们展示了这两种类型的行为都可以通过由标准TMDD模型的高亲和近似产生的简单表达式来描述。有趣的是,著名的Michaelis-Menten (MM)近似出现在低亲和力的相反极限,如果全身药物清除足够慢。我们的推导包含了先前在MM常数前面缺失的因子,当靶标和药物靶标复合物消除率不同时,该因子变得重要。作为靶抑制的度量,我们还推导了自由靶与基线比的简单表达式,并将我们的近似与大分子和小分子的数据进行了比较。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
求助全文
约1分钟内获得全文 求助全文
来源期刊
CiteScore
5.00
自引率
11.40%
发文量
146
审稿时长
8 weeks
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
确定
请完成安全验证×
copy
已复制链接
快去分享给好友吧!
我知道了
右上角分享
点击右上角分享
0
联系我们:info@booksci.cn Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术官方微信