目标:最近,模型知情药物开发发展迅速,这有可能减少动物实验并加速药物发现。基于生理的药代动力学(PBPK)和机器学习(ML)模型通常用于早期药物发现以预测药物特性。然而,基本的PBPK模型需要来自体外实验的大量分子特异性输入,这阻碍了这些模型的效率和准确性。为了解决这个问题,本文介绍了一种结合ML和PBPK模型的新计算平台。该平台以高准确度预测分子PK谱,并且不需要实验数据。
方法:这项研究开发了全身PBPK模型和未结合血浆蛋白部分的ML模型(fup),Caco-2细胞通透性,和总血浆清除率来预测静脉给药后小分子的PK。使用具有ML输入的“自下而上”PBPK建模方法来模拟药代动力学概况。此外,40种化合物用于评价平台的准确性。
结果:结果表明,ML-PBPK模型在2倍范围内以65.0%的准确度预测浓度-时间曲线下面积(AUC),高于使用体外输入,准确率为47.5%。
结论:与传统的PBPK方法相比,ML-PBPK模型平台提供了较高的预测精度,并减少了实验次数和所需的时间。该平台无需体外和体内实验即可成功预测人类PK参数,并可能指导早期药物发现和开发。
OBJECTIVE: Recently, there has been rapid development in model-informed drug development, which has the potential to reduce animal experiments and accelerate drug discovery. Physiologically based pharmacokinetic (PBPK) and machine learning (ML) models are commonly used in early drug discovery to predict drug properties. However, basic PBPK models require a large number of molecule-specific inputs from in vitro experiments, which hinders the efficiency and accuracy of these models. To address this issue, this paper introduces a new computational platform that combines ML and PBPK models. The platform predicts molecule PK profiles with high accuracy and without the need for experimental data.
METHODS: This study developed a whole-body PBPK model and ML models of plasma protein fraction unbound ( f up ), Caco-2 cell permeability, and total plasma clearance to predict the PK of small molecules after intravenous administration. Pharmacokinetic profiles were simulated using a \"bottom-up\" PBPK modeling approach with ML inputs. Additionally, 40 compounds were used to evaluate the platform\'s accuracy.
RESULTS: Results showed that the ML-PBPK model predicted the area under the concentration-time curve (AUC) with 65.0 % accuracy within a 2-fold range, which was higher than using in vitro inputs with 47.5 % accuracy.
CONCLUSIONS: The ML-PBPK model platform provides high accuracy in prediction and reduces the number of experiments and time required compared to traditional PBPK approaches. The platform successfully predicts human PK parameters without in vitro and in vivo experiments and can potentially guide early drug discovery and development.