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- W4313405863 abstract "Abstract Objective Immune cell recruitment into tissues is an essential step in inflammatory responses. This occurs in a highly tissue- and stimulus-specific manner, which presents a significant challenge to modeling disease and testing therapeutics ex vivo. We previously developed an advanced primary human vascularized Colon Intestine-Chip model and showed that it recapitulates physiologic cell composition, morphology and barrier function. The goal of this study was to test the ability of this system to model inflammatory bowel disease (IBD)-like immune cell reactions ex vivo. Methods We perfused primary human peripheral blood mononuclear cells (PBMC) across the vascular channel in untreated ‘resting’ or TNFα/chemokine-treated ‘inflamed’ Colon Intestine-Chips. We analyzed total cell recruitment, inflammatory cytokine secretion and barrier function in the following 24–72 hours. Results We show that the perfused PBMC efficiently adhered and transmigrated to the epithelial channel in an inflammation-specific manner. This was followed by an accumulation of proinflammatory cytokines characteristic of IBD (e.g., INFγ, IL1β, IL18), as well as loss of barrier function, the hallmark feature of IBD. We further showed that 1) the recruited cells were strongly enriched in the ‘gut trophic’ α4β7+/CCR9+ PBMC subsets and 2) this recruitment could be blocked with the IBD therapeutic Entyvio, which targets the α4β7-MAdCAM-1 interaction. Conclusion Our findings indicate that our Colon Intestine-Chip can model inflammatory immune cell recruitment and in situ immune reactions that reflect key clinical correlates of IBD. This model may prove effective for development of new anti-inflammatory therapeutics for human intestinal diseases. Supported by Emulate Bio" @default.
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- W4313405863 date "2022-05-01" @default.
- W4313405863 modified "2023-09-23" @default.
- W4313405863 title "Modeling Inflammatory Immune Cell Recruitment and Response on Human Colon Intestine-Chip" @default.
- W4313405863 doi "https://doi.org/10.4049/jimmunol.208.supp.116.13" @default.
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