Advanced methodology for bacterial colonization of 3D organotypic epidermal models: a gateway to long-term host-microbe interaction and intervention studies
Rikken, G.; Meesters, L.; Jansen, P.; Rodijk-Olthuis, D.; van Vlijmen-Willems, I.; Niehues, H.; Olah, P.; Homey, B.; Schalkwijk, J.; Zeeuwen, P.; van den Bogaard, E.
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BackgroundFollowing descriptive studies on skin microbiota in health and disease, mechanistic studies on the interplay between skin and microbes are on the rise, for which experimental models are in great demand. Here, we present a novel methodology for microbial colonization of organotypic skin and analysis thereof. ResultsAn inoculation device ensured a standardized application area on the stratum corneum and a homogenous distribution of bacteria, while preventing infection of the basolateral culture medium even during prolonged co-culture periods for up to two weeks at a specific culture temperature and humidity. Hereby, host-microbe interactions and antibiotic interventions could be studied, revealing diverse host responses to various skin-related bacteria and pathogens. ConclusionsOur methodology is easily transferable to a wide variety of organotypic skin or mucosal models and different microbes at every cell culture facility at low costs. We envision that this study will kick-start skin microbiome studies using human organotypic skin cultures, providing a powerful alternative to experimental animal models in pre-clinical research.
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