A murine ex vivo 3D kidney proximal tubule model predicts clinical drug-induced nephrotoxicity

Diekjürgen, Dorina; Grainger, David W.

doi:10.1007/s00204-019-02430-9

In vitro systems
Published: 12 March 2019

A murine ex vivo 3D kidney proximal tubule model predicts clinical drug-induced nephrotoxicity

Archives of Toxicology volume 93, pages 1349–1364 (2019)Cite this article

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Abstract

Drug attrition and clinical product withdrawals due to nephrotoxicity remain major challenges for pharmaceutical drug development pipelines. Currently, no reliable high-throughput in vitro screening models are available that provide reliable, predictive toxicology data for clinical nephrotoxicity. Drug screens to predict toxicity and pharmacology assessments are compromised by standard two-dimensional (2D) cell monoculture models. Here we extend a previously reported murine three-dimensional (3D) kidney-derived intact proximal tubule model to provide ex vivo drug toxicity data that reliably compare to clinical experiences and improve nephrotoxicity predictions over current 2D cell assays. Proximal tubule cytotoxicity was monitored by ATP depletion for 12 compounds (acarbose, acetylsalicylic acid, captopril, cimetidine, cidofovir, cisplatin, doxorubicin, gentamicin, polymyxin B, polymyxin B nonapeptide, probenecid and vancomycin) in 3D proximal tubule ex vivo assays. Drug concentration–response curves (1–1000 µM) and IC₅₀, lowest effective concentration (LEC) and AUC values were compared to clinical therapeutic exposure levels (C_max). The 100-fold C_max threshold demonstrated best sensitivity (96.9%) and specificity (87.5%) for this assay, with high positive (93.9%) and negative (93.3%) predictive values for nephrotoxicity. IC₅₀ values were superior to LEC. Results also support the model’s capability to predict substrate-inhibitor/competitor interactions, yielding toxicity results similar to those reported in vivo. These 3D proximal tubule-based drug screens provide more reliable nephrotoxicity predictions, and more insight into complex mechanisms implicated in nephrotoxicity than current standard 2D cell assays. This new approach for rapid drug toxicity testing produces more reliable clinical comparisons than current 2D cell culture screening techniques.

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Acknowledgements

This work was supported by AstraZeneca UK Limited, London, England. We thank Dr. M. Wagoner (AstraZeneca Pharmaceuticals, USA) for valuable discussions. DWG is grateful for support from the George S. and Dolores Doré Eccles Foundation (USA).

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Department of Pharmaceutics and Pharmaceutical Chemistry, University of Utah, Salt Lake City, UT, 84112-5820, USA
Dorina Diekjürgen & David W. Grainger
Department of Biomedical Engineering, University of Utah, Salt Lake City, UT, 84112-5820, USA
David W. Grainger

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Diekjürgen, D., Grainger, D.W. A murine ex vivo 3D kidney proximal tubule model predicts clinical drug-induced nephrotoxicity. Arch Toxicol 93, 1349–1364 (2019). https://doi.org/10.1007/s00204-019-02430-9

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Received: 08 October 2018
Accepted: 05 March 2019
Published: 12 March 2019
Issue Date: 01 May 2019
DOI: https://doi.org/10.1007/s00204-019-02430-9

Keywords

Kidney toxicity
3D assay
In vitro toxicity assessment
Drug development
Cytotoxicity
Drug safety