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IL-1 family signalling drives mucosal defence against systemic Candida albicans infection
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DOI：10.1038/s41564-026-02431-2.png)
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Abstract
En 中文
Candida albicans is a major opportunistic pathogen in humans that is capable of breaching mucosal barriers and causing severe systemic infections with high mortality. How the host controls mucosal infection and prevents dissemination remains unclear but is essential for improving disease outcomes. Here we demonstrate that C. albicans induces specific IL-1 family members, which are critical for initiating mucosal protection by controlling antimicrobial peptides, IL-17 and neutrophil responses. The loss of combined IL-1 family signalling led to severe oropharyngeal C. albicans infection, which was eventually resolved by a potent neutrophil response. However, in neutropenic conditions, a key patient risk factor, abolishing IL-1 family signalling resulted in C. albicans dissemination, predominantly to the liver, mirroring clinical disease and leading to mortality. This study highlights the IL-1 family as a key initiator of mucosal immunity, restricting mucosal invasion and cooperating with neutrophils to prevent life-threatening systemic infections. IL-1 family signalling drives host mucosal defence against Candida albicans and, together with neutrophils, prevents mucosal–systemic dissemination and life-threatening fungal disease.
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