ALTEX :: Alternatives to Animal Experiments

2004, VOLUME 2

Assessment of a New Cell Culture Perfusion Apparatus for In Vitro Chronic Toxicity Testing Part 2: Toxicological Evaluation

Christian Koppelstaetter1, Paul Jennings2, Michael P. Ryan2, Jean-Paul Morin3, Thomas Hartung4 and Walter Pfaller1

1Department of Physiology, University of Innsbruck, A-Innsbruck; 2Pharmacology Dept., The Conway Institute of Biomolecular and Biomedical Research, IRL-Dublin; 3INSERM, Faculté de Médecine Pharmacie, Université de Rouen, F-Rouen; 4Biomedical Pharmacology, University of Konstanz, D-Germany

SUMMARY

The goal of replacement, refinement and reduction of animal testing is critically dependent on the development and assessment of novel in vitro methodologies and the further development of existing methodologies. Here, we evaluated the use of a modified perfusion cell culture apparatus for application to chronic in vitro nephrotoxicity testing using DMSO, SDS, paracetamol and cyclosporine A as test compounds.

Renal epithelial monolayers were cultured on microporous growth supports and exposed to test compounds under static or perfusion conditions. Alamar Blue reduction, gamma-glutamyl transpeptidase activity (GGT), lactate dehydrogenase activity (LDH) and remnant protein were used to assay cell toxicity. There was no significant difference in IC50 values between static and perfusion cultures up to 72 hours exposure. However, the perfusion system allowed continuous real-time monitoring of plasma membrane damage, which gives important information of time, duration and scale of toxicity.

The complexity of the system restrains its use to low-throughput analysis. However, the real and theoretical advantages of this and similar systems merit further investigations.

Keywords: perfusion, cell culture, toxicity, chronic, DMSO, paracetamol, Cyclosporine A