Abstract
Introduction
Pyrotinib is a newly developed tyrosine kinase inhibitor whose in vivo clearance relies heavily on cytochrome P450 3A4 (CYP3A4) activity. Clinical trials are ongoing to explore the effects of coadministration with CYP3A4 perpetrators on pyrotinib exposure. The present study aims to utilize physiologically based pharmacokinetic (PBPK) modeling to predict CYP3A4-based drug interactions of pyrotinib.
Methods
Pyrotinib PBPK model was developed in the PK-Sim® multicompartmental physiology structure. Physiochemical parameters were obtained from the literature, and clearance-related parameters were optimized by fitting clinical single-dose pharmacokinetic data. Pharmacokinetic parameters from the model output were compared with the observed data to validate the model predictive performance. Using validated CYP3A4 perpetrator models, we conducted PBPK simulations for drug interactions in a virtual population to explore the impacts of comedication with these perpetrators.
Results
The PBPK model accurately describes pyrotinib single- and multi-dose pharmacokinetics. The model also predicts dramatic exposure change of pyrotinib in the presence of itraconazole and rifampicin, though the impact of rifampicin is somewhat underestimated. According to model predictions, coadministration with typical potent or moderate CYP3A4 perpetrators increases pyrotinib concentration by over sixfold, extinguishing the possibility of dose adjustment for pyrotinib. A weak CYP3A4 inhibitor has minimal influence on pyrotinib pharmacokinetics.
Conclusion
PBPK modeling provides valuable information to avoid irrational medication when receiving pyrotinib chemotherapy.
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Acknowledgements
The authors thank Jiangsu Hengrui Pharmaceuticals Co., Ltd., for providing clinical data of pyrotinib and Dr. Bin Ye from Shenzhen Institute of Advanced Technology for providing graphing support.
Funding
This study is funded by the Research Fund of Anhui Institute of Translational Medicine (project no. 2022zhyx-B10) and the Natural Science Foundation of Anhui Province (no. 2108085QH383). The Rapid Service Fee was funded by the authors.
Author Contributions
Liang Ni, Liang Zheng, Yueyue Liu, Wenwen Xu, Yingjie Zhao, Ling Wang, Qian Zhang, Wei Hu, and Xijing Chen contributed to the study concept and design, modeling, data analysis, drafting of the manuscript, and revision of the manuscript.
Disclosures
Liang Ni, Liang Zheng, Yueyue Liu, Wenwen Xu, Yingjie Zhao, Ling Wang, Qian Zhang, Wei Hu, and Xijing Chen have no conflicts of interest to declare in this work.
Compliance with Ethics Guidelines
This article is based on previously conducted studies and does not contain any new studies with human participants or animals performed by any of the authors.
Data Availability
The model file will be publicly available in the Open Systems Pharmacology Community (https://github.com/Open-Systems-Pharmacology).
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Ni, L., Zheng, L., Liu, Y. et al. Physiologically Based Pharmacokinetic Modeling to Simulate CYP3A4-Mediated Drug-Drug Interactions for Pyrotinib. Adv Ther 40, 4310–4320 (2023). https://doi.org/10.1007/s12325-023-02602-1
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DOI: https://doi.org/10.1007/s12325-023-02602-1