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This research aims to clarify how mast cell chymase interacts with human lung fibroblasts and its implications for asthma.

February 12, 2026InflammationOpen Access

Mast Cell Chymase and Human Lung Fibroblast Interaction: Mechanisms and Implications for Asthma

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Experimental findings reveal chymase influences human lung fibroblast activity, suggesting new asthma insights.

This research aims to clarify how mast cell chymase interacts with human lung fibroblasts and its implications for asthma.
Investigated effects of chymase on primary human lung fibroblasts (HLFs).
Employed Western blot analysis to assess changes in fibronectin and related signalling factors.
Conducted cell migration assays to evaluate fibroblast motility.
Utilized Seahorse technology to measure metabolic activity in HLFs.
Chymase treatment reduced the motility of human lung fibroblasts.
Signalling factors like integrin αVb3, focal adhesion kinase, Src, and Akt were affected by chymase.
Chymase led to the degradation of fibronectin and suppression of CREB and c-Jun phosphorylation.
Chymase was taken up by HLFs and suppressed their metabolic activity without inducing cell death.

Pejler et al. (2026) studied this question.

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