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Toxicol In Vitro. 2015 Dec 25;30(1 Pt A):106-16. doi: 10.1016/j.tiv.2014.10.005. Epub 2014 Oct 23.

Application of RPTEC/TERT1 cells for investigation of repeat dose nephrotoxicity: A transcriptomic study.

Author information

1
Division of Physiology, Dept. of Physiology and Medical Physics, Innsbruck Medical University, Fritz-Pregl Strasse 3, 6020 Innsbruck, Austria.
2
Department of Biostatistics, German Cancer Research Center (DKFZ), Im Neuenheimer Feld 280, 69120 Heidelberg, Germany.
3
Non-Clinical Safety, Merck Serono, Frankfurter Strasse 250, 64293 Darmstadt, Germany.
4
Emergentec Biodevelopment GmbH, Gersthofer Strasse 29-31, 1180 Vienna, Austria.
5
Centre for Radiation, Chemical and Environmental Hazards, Public Health England, Chilton, Didcot, Oxon OX11 0RQ, UK.
6
Division of Physiology, Dept. of Physiology and Medical Physics, Innsbruck Medical University, Fritz-Pregl Strasse 3, 6020 Innsbruck, Austria. Electronic address: paul.jennings@i-med.ac.at.

Abstract

The kidney is a major target organ for toxicity. Incidence of chronic kidney disease (CKD) is increasing at an alarming rate due to factors such as increasing population age and increased prevalence of heart disease and diabetes. There is a major effort ongoing to develop superior predictive models of renal injury and early renal biomarkers that can predict onset of CKD. In the EU FP7 funded project, Predict-IV, we investigated the human renal proximal tubule cells line, RPTEC/TERT1 for their applicability to long term nephrotoxic mechanistic studies. To this end, we used a tiered strategy to optimise dosing regimes for 9 nephrotoxins. Our final testing protocol utilised differentiated RPTEC/TERT1 cells cultured on filter inserts treated with compounds at both the apical and basolateral side, at concentrations not exceeding IC10, for 14 days in a 24 h repeat application. Transepithelial electrical resistance and supernatant lactate were measured over the duration of the experiments and genome wide transcriptomic profiles were assayed at day 1, 3 and 14. The effect of hypoxia was investigated for a subset of compounds. The transcriptomic data were analysed to investigate compound-specific effects, global responses and mechanistically informative signatures. In addition, several potential clinically useful renal injury biomarkers were identified.

KEYWORDS:

Nephrotoxin; Proximal tubule; RPTEC/TERT1; Stress response; Transcriptomics

PMID:
25450743
DOI:
10.1016/j.tiv.2014.10.005
[Indexed for MEDLINE]

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