Theoretical and Natural Science

- The Open Access Proceedings Series for Conferences


Theoretical and Natural Science

Vol. 29, 16 January 2024


Open Access | Article

Improving brain penetration using elacridar—a P-glycoprotein and BCRP inhibitor

Xinyue Yao * 1
1 Shenzhen College Of International Education

* Author to whom correspondence should be addressed.

Theoretical and Natural Science, Vol. 29, 50-62
Published 16 January 2024. © 2023 The Author(s). Published by EWA Publishing
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Citation Xinyue Yao. Improving brain penetration using elacridar—a P-glycoprotein and BCRP inhibitor. TNS (2024) Vol. 29: 50-62. DOI: 10.54254/2753-8818/29/20240729.

Abstract

The central nervous system (CNS) is a site for a myriad of disorders and diseases, such as schizophrenia, Alzheimer’s disease, and Parkinson’s disease. Many medications targeting these illnesses remain challenged due to efflux transporters forming a blood-brain barrier (BBB). To combat such challenges, elacridar shown promise at inhibiting such transporters, such as P-glycoprotein (P-gp) and breast cancer resistance protein (BCRP), therefore improving brain penetration. However, as an early clinical candidate, many remain unknown about elacridar’s pharmacokinetic (PK) properties in the human body. This paper aims to obtain a better understanding of elacridar’s pharmacokinetic profile and predict the optimal dose and dose interval for its application in the clinic. To begin with, a series of basic PK models were created using fundamental PK equations and the models were fit to elacridar clinical data to obtain elacridar-specific PK parameters. Next, elacridar preclinical PK as well as in vitro inhibition assay were used to determine the therapeutic window. Our final, multiple-dose extravascular PK model reveals that the most convenient and effective dose regimen is 900 mg BID (bis in die; twice per day). With this elacridar PK model, researchers can leverage elacridar human PK to improve clinical outcomes.

Keywords

Blood-Brain Barrier, Pharmacokinetics Modeling, Elacridar, Efflux Transporters

References

1. Reichel, A. Addressing Central Nervous System (CNS) Penetration in Drug Discovery: Basics and Implications of the Evolving New Concept. Chem. Biodivers. 2009, 6 (11), 2030–2049.

2. Daneman, R.; Prat, A. The Blood–Brain Barrier. Cold Spring Harb. Perspect. Biol. 2015, 7 (1), a020412.

3. Di, L.; Kerns, E. H.; Carter, G. T. Strategies to Assess Blood–Brain Barrier Penetration. Expert Opin. Drug Discov. 2008, 3 (6), 677–687.

4. Dash, R. P.; Jayachandra Babu, R.; Srinivas, N. R. Therapeutic Potential and Utility of Elacridar with Respect to P-Glycoprotein Inhibition: An Insight from the Published in Vitro, Preclinical and Clinical Studies. Eur. J. Drug Metab. Pharmacokinet. 2017, 42, 915–933.

5. Chen, H.; Shien, K.; Suzawa, K.; Tsukuda, K.; Tomida, S.; Sato, H.; Torigoe, H.; Watanabe, M.; Namba, K.; Yamamoto, H.; others. Elacridar, a Third-Generation ABCB1 Inhibitor, Overcomes Resistance to Docetaxel in Non-Small Cell Lung Cancer. Oncol. Lett. 2017, 14 (4), 4349–4354.

6. Wagner, J. G. History of Pharmacokinetics. Pharmacol. Ther. 1981, 12 (3), 537–562.

7. Buxton, I. L. Pharmacokinetics and Pharmacodynamics. Goodman Gilman’s Pharmacol. Basis Ther. 11th Ed N. Y. McGraw-Hill 2006, 1–52.

8. Derendorf, H.; Meibohm, B. Modeling of Pharmacokinetic/Pharmacodynamic (PK/PD) Relationships: Concepts and Perspectives. Pharm. Res. 1999, 16, 176–185.

9. Sawicki, E.; Verheijen, R. B.; Huitema, A. D.; van Tellingen, O.; Schellens, J. H.; Nuijen, B.; Beijnen, J. H.; Steeghs, N. Clinical Pharmacokinetics of an Amorphous Solid Dispersion Tablet of Elacridar. Drug Deliv. Transl. Res. 2017, 7, 125–131.

10. Rautio, J.; Humphreys, J. E.; Webster, L. O.; Balakrishnan, A.; Keogh, J. P.; Kunta, J. R.; Serabjit-Singh, C. J.; Polli, J. W. In Vitro P-Glycoprotein Inhibition Assays for Assessment of Clinical Drug Interaction Potential of New Drug Candidates: A Recommendation for Probe Substrates. Drug Metab. Dispos. 2006, 34 (5), 786–792.

11. Bohnert, T.; Gan, L.-S. Plasma Protein Binding: From Discovery to Development. J. Pharm. Sci. 2013, 102 (9), 2953–2994.

12. Imai, S.; Arai, T.; Yamada, T.; Niwa, M. Improved In Vitro-In Vivo Correlation by Using the Unbound-Fraction-Adjusted IC 50 for Breast Cancer Resistance Protein Inhibition. Pharm. Res. 2020, 37, 1–11.

13. Ward, K. W.; Azzarano, L. M. Preclinical Pharmacokinetic Properties of the P-Glycoprotein Inhibitor GF120918A (HCl Salt of GF120918, 9, 10-Dihydro-5-Methoxy-9-Oxo-N-[4-[2-(1, 2, 3, 4-Tetrahydro-6, 7-Dimethoxy-2-Isoquinolinyl) Ethyl] Phenyl]-4-Acridine-Carboxamide) in the Mouse, Rat, Dog, and Monkey. J. Pharmacol. Exp. Ther. 2004, 310 (2), 703–709.

Data Availability

The datasets used and/or analyzed during the current study will be available from the authors upon reasonable request.

This work is licensed under a Creative Commons Attribution-ShareAlike 4.0 International License. Authors who publish this series agree to the following terms:

1. Authors retain copyright and grant the series right of first publication with the work simultaneously licensed under a Creative Commons Attribution License that allows others to share the work with an acknowledgment of the work's authorship and initial publication in this series.

2. Authors are able to enter into separate, additional contractual arrangements for the non-exclusive distribution of the series's published version of the work (e.g., post it to an institutional repository or publish it in a book), with an acknowledgment of its initial publication in this series.

3. Authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website) prior to and during the submission process, as it can lead to productive exchanges, as well as earlier and greater citation of published work (See Open Access Instruction).

Volume Title
Proceedings of the 2nd International Conference on Modern Medicine and Global Health
ISBN (Print)
978-1-83558-279-4
ISBN (Online)
978-1-83558-280-0
Published Date
16 January 2024
Series
Theoretical and Natural Science
ISSN (Print)
2753-8818
ISSN (Online)
2753-8826
DOI
10.54254/2753-8818/29/20240729
Copyright
16 January 2024
Open Access
This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

Copyright © 2023 EWA Publishing. Unless Otherwise Stated