Abstract
Purpose
This study evaluated the preclinical pharmacokinetics (PK) and disposition of Fruquintinib (HMPL-013), a small molecule vascular endothelial growth factor receptors inhibitor.
Methods
In vitro and in vivo PK/ADME assays were conducted. Allometry and PK modeling/simulation were conducted to predict human PK parameters and the time course profiles.
Results
HMPL-013 has high permeability without efflux. It shows moderate oral bioavailability of 42–53 % and T max < 4 h in mouse, rat, dog and monkey, with exposure-dose linearity proved in rats and dogs. No significant food effect is on dog PK. HMPL-013 has moderately high tissue distribution. It majorly distributes in gastrointestinal tract, liver, kidney, adrenal and adipose. The plasma protein binding fraction is 88–95 % in mouse, rat, dog and human, invariable up to 10 µM. The in vivo clearance of HMPL-013 is low, consistent with the in vitro scaling. Three major oxidative metabolites were identified in liver microsomes of mouse, rat, dog, monkey and human. Dog is mostly similar to human regarding in vitro metabolism. Demethylation, hydroxylation and sequential glucuronidation are the major in vivo metabolic reactions. Direct urinary and biliary excretion of HMPL-013 is negligible. Metabolizing to M1 (demethylation), sequentially glucuronidating, followed by biliary excretion, and to a less extent, by urinary excretion, are important elimination pathways for HMPL-013 in rats. HMPL-013 has low risk of drug–drug interaction. It is predicted to have favorable human PK properties and low efficacious dose.
Conclusion
HMPL-013 demonstrates good preclinical PK and enables successful human PK and dose projection. It is valuable for further clinical development.
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Abbreviations
- VEGF:
-
Vascular endothelial growth factor
- VEGFR:
-
Vascular endothelial growth factor receptors
- TKI:
-
Tyrosine kinase inhibitors
- PK:
-
Pharmacokinetics
- ADME:
-
Absorption, distribution, metabolism and excretion
- RED:
-
Rapid equilibrium dialysis
- CYP:
-
Cytochrome P450
- API:
-
Active pharmaceutical ingredient
- AUCinf :
-
Area under the concentration–time curve from time zero to infinity
- C max :
-
Maximal concentration
- T max :
-
Time to reach the maximal concentration
- MID:
-
Metabolite identification
- IS:
-
Internal standard
- t 1/2 :
-
Half-lives
- CLR :
-
Renal clearance
- CLB :
-
Biliary clearance
- CL:
-
Plasma total clearance
- V z :
-
Volume of distribution at the terminal phase
- BW:
-
Body weight
- RoE:
-
Rule of exponents
- FIH:
-
First-in-human
- PD:
-
Pharmacodynamic
- CLhep,pred :
-
Predicted hepatic clearance
- CLint :
-
In vitro intrinsic clearance
- BDC:
-
Bile duct cannulated
- MLP:
-
Maximal life span potential
- Tlag:
-
Lag time
- Ka:
-
Absorption rate constant
- DDI:
-
Drug–drug interaction
- f e :
-
Fraction excreted
- f m :
-
Fraction metabolized
- GFR:
-
Glomerular filtration rate
- PBPK:
-
Physiological-based PK
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Acknowledgments
The authors are sincerely thankful for the great contributions of Prof. Dafang Zhong and Prof. Xiaoyan Chen from Shanghai Institute of Materia Medica to the rat and dog’s studies, Prof. Zhuohan Hu from Research Institute for Liver Diseases (Shanghai) Co. Ltd. to the human hepatocyte study and Dr. Renke Dai from Zhongshan PharmaSS Corporation to the hPXR study. Appreciations are also given to all the colleagues in Hutchison MediPharma who contributed to the HMPL-013 project.
Conflict of interest
The authors were all employees of Hutchison MediPharma Limited when the study was conducted and are alone responsible for the content and writing of this paper.
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Gu, Y., Wang, J., Li, K. et al. Preclinical pharmacokinetics and disposition of a novel selective VEGFR inhibitor Fruquintinib (HMPL-013) and the prediction of its human pharmacokinetics. Cancer Chemother Pharmacol 74, 95–115 (2014). https://doi.org/10.1007/s00280-014-2471-3
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DOI: https://doi.org/10.1007/s00280-014-2471-3