Abstract
Purpose
Lipid-based formulations (LBF) have shown oral bioavailability enhancement of lipophilic drugs, but not necessarily in the case of hydrophobic drugs. This study explored the potential of lipid vehicles to improve the bioavailability of the hydrophobic drug nilotinib comparing a chase dosing approach and lipid suspensions.
Methods
Nilotinib in vivo bioavailability in rats was determined after administering an aqueous suspension chase dosed with blank olive oil, Captex 1000, Peceol or Capmul MCM, respectively. Absolute bioavailability was determined (relative to an intravenous formulation). Pharmacokinetic parameters were compared to lipid suspensions.
Results
Compared to the lipid suspensions, the chase dosed lipids showed a 2- to 7-fold higher bioavailability. Both long chain chase dosed excipients also significantly increased the bioavailability up to 2-fold compared to the aqueous suspension. Deconvolution of the pharmacokinetic data indicated that chase dosing of nilotinib resulted in prolonged absorption compared to the aqueous suspension.
Conclusion
Chase dosed LBF enhanced the in vivo bioavailability of nilotinib. Long chain lipids showed superior performance compared to medium chain lipids. Chase dosing appeared to prolong the absorption phase of the drug. Therefore, chase dosing of LBF is favourable compared to lipid suspensions for ‘brick dust’ molecules such as nilotinib.
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Abbreviations
- MC:
-
Medium chain
- LC:
-
Long chain
- MG:
-
Monoglyceride
- TG:
-
Triglyceride
- LBF:
-
Lipid-based formulation
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ACKNOWLEDGMENTS AND DISCLOSURES
This work was kindly supported by funding from the Horizon 2020 Marie Sklodowska-Curie Innovative Training Networks programme under grant agreement No. 674909. The authors are part of the PEARRL European Training network, which is funded under this MSCA programme.
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Koehl, N.J., Holm, R., Kuentz, M. et al. Chase Dosing of Lipid Formulations to Enhance Oral Bioavailability of Nilotinib in Rats. Pharm Res 37, 124 (2020). https://doi.org/10.1007/s11095-020-02841-9
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DOI: https://doi.org/10.1007/s11095-020-02841-9