ArticleFrontiers in cellular and infection microbiology2026
Host-pathogen-immune interactions in an air-liquid interface airway model.
Article in Frontiers in cellular and infection microbiology, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 1 paper.
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1 citing paper in PubMed.
- Simulating the host niche: balancing complexity and control in the experimental evolution of antibiotic resistance and pathoadaptation.Microbiology (Reading, England) · 2026Review
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8 authors.
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Abstract
Background: Air-liquid interface (ALI) cell culture systems have improved the study of host-pathogen interactions in respiratory infections. However, most ALI models lack immune components, limiting their ability to capture epithelial-immune crosstalk. To address this, we developed a dual-cell ALI model incorporating human peripheral blood monocyte-derived macrophages beneath differentiated airway epithelial cells. Methodology: Macrophages were seeded on the basolateral side of transwell inserts using fibronectin coating. Model characterization included transepithelial electrical resistance (TEER) to assess epithelial barrier integrity, IL-8 secretion as a marker of epithelial inflammatory signaling, and confocal microscopy to evaluate cellular architecture before and after infection. Mono- and dual-cell cultures were infected with the laboratory strain Results: Macrophages adhered stably to the basolateral surface without compromising epithelial barrier integrity. Following infection, IL-8 secretion was elevated in epithelial monocultures compared to dual-cell cultures, suggesting early immune modulation in the presence of macrophages. While overall bacterial burden was comparable, confocal imaging revealed clustered bacterial growth in monocultures and a more dispersed spatial distribution in dual-cell cultures. Conclusions: This dual-cell ALI model enables investigation of early epithelial-immune interactions, inflammatory modulation, and bacterial colonization dynamics during airway infection. The system provides a versatile and human-relevant platform for studying respiratory host-pathogen interactions.
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