ArticleFrontiers in immunology2025
Elevated SerpinB2 regulates MUC5AC expression via STAT6 signaling in nasal epithelial cells in allergic rhinitis.
Article in Frontiers in immunology, 2025. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Background: SerpinB2 is expressed in airway epithelial cells in nasal polyps and asthma in association with Type-2 inflammation. Allergic rhinitis (AR) is similarly associated with Type-2 inflammation and mucus hypersecretion. MUC5AC has been reported to be regulated by IL-13 in nasal epithelial cells (NECs). This study aimed to evaluate SerpinB2 expression in AR and determine whether SerpinB2 regulates MUC5AC via STAT6 signaling. Methods: SerpinB2 gene expression in single-cell RNA sequencing databases was analyzed through bioinformatics approaches. SerpinB2 and MUC5AC expression levels were evaluated in intermittent or persistent AR patients and healthy controls (HC). Colocalization of SerpinB2 and MUC5AC was assessed by immunofluorescence. Fresh NECs were cultured at air-liquid interface with or without IL-13, SerpinB2 Dicer-substrate short interfering RNAs (DsiRNAs) transfection, exogenous SerpinB2, and pSTAT6 inhibitors. SerpinB2, MUC5AC, and STAT6 were analyzed using qRT-PCR, Western blot, immunofluorescence, and ELISA. Results: SerpinB2 expression was significantly increased in both intermittent and persistent AR compared to normal mucosa from HC. SerpinB2 correlated with MUC5AC expression and colocalized with MUC5AC in NECs from AR patients. In primary NECs Conclusions: SerpinB2 is upregulated in AR NECs and contributes to MUC5AC expression through STAT6 signaling pathway activation. Therefore, targeting SerpinB2 may have therapeutic value in treating AR patients.
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