Precision-cut lung slices in air-liquid interface (PCLS-ALI): A novel ex-vivo model for the study of Pulmonary Aspergillosis
Gonzales-Huerta, L. E.; Williams, T. J.; Aljohani, R.; Robertson, B. D.; Evans, C. A.; Armstrong-James, D.
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Pulmonary Aspergillosis is a respiratory infection with a high mortality rate, which affects patients with immunosuppression or structural lung defects. Antifungal treatment options are few and many have narrow therapeutic margins and potentially serious side effects. In recent years, there are growing numbers of reports of antifungal resistance. Thus, there is an urgent need for effective models to study fungal pathogenesis and test antifungal therapies in the respiratory system. Here, we present a novel ex-vivo model using precision-cut lung slices in an air-liquid interface platform to evaluate lung tissue responses to fungal infection and antifungal treatment. Readouts assessed were lactate dehydrogenase for tissue damage, release of inflammatory cytokines (TNF-, IL-1{beta}, CXCL1), and histology for confirmation of hyphal invasion. Overall, the PCLS-ALI model is a promising approach for understanding lung tissue responses to fungal infections, which fulfils the reduction and refinement components of the 3Rs guiding principles for ethical use of experimental animals.
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