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Models of oral and vaginal candidiasis based on in vitro reconstituted human epithelia

Abstract

This protocol describes the setup, maintenance and characteristics of models of epithelial Candida infections based on well-established three-dimensional organotypic tissues of human oral and vaginal mucosa. Infection experiments are highly reproducible and can be used for the direct analysis of pathogen–epithelial cell interactions. This allows detailed investigations of Candida albicans wild type or mutant strain interaction with epithelial tissue or the evaluation of the host immune response using histological, biochemical and molecular methods. As such, the models can be utilized as a tool to investigate cellular interactions or protein and gene expression that are not complicated by non-epithelial factors. To study the impact of innate immunity or the antifungal activity of natural and non-natural compounds, the mucosal infection models can be supplemented with immune cells, antimicrobial agents or probiotic bacteria. The model requires at least 3 days to be established and can be maintained thereafter for 2–4 days.

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Figure 1: Scanning electron micrograph of C. albicans interacting with the oral RHE.
Figure 2: Schematic diagram of the experimental design.
Figure 3: Light micrographs of oral RHE 24 h after inoculation with C. albicans SC5314 in the absence and presence of PMNs.

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Acknowledgements

We thank all the previous undergraduate and graduate students who have completed a project or a thesis in the laboratory and helped to build the foundations of these protocols. We thank Birgit Fehrenbacher, Renate Nordin, Helga Möller and Hannelore Bischof, University of Tuebingen, for excellent technical assistance and Gudrun Holland and Muhsin Özel, Robert Koch-Institute, for providing Figure 3. M.S. and G.W. were supported by the Deutsche Forschungsgemeinschaft (Sch 897/1; Sch 897/3), B.H. by the Robert Koch-Institute, the Deutsche Forschungsgemeinschaft (Hu 528/8; Hu 528/10) and the European Commission Union (QLK2-2000-00795; “Galar Fungail consortium”) and M.S. and J.N. by NIH grant R01 DE017514-01 and J.N. by a personal Wellcome Trust Value in People (VIP) award.

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Correspondence to Martin Schaller.

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Schaller, M., Zakikhany, K., Naglik, J. et al. Models of oral and vaginal candidiasis based on in vitro reconstituted human epithelia. Nat Protoc 1, 2767–2773 (2006). https://doi.org/10.1038/nprot.2006.474

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