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Observational Study
. 2025 Apr;80(4):1025-1037.
doi: 10.1111/all.16445. Epub 2025 Jan 3.

The Role of WNT5a and TGF-β1 in Airway Remodelling and Severe Asthma

Tariq Daud  1 , Sheree Roberts  1 , Nazanin Zounemat Kermani  2   3 , Matthew Richardson  1 , Liam G Heaney  4 , Ian M Adcock  3 , Yassine Amrani  1 , Peter Bradding  1 , Salman Siddiqui  1   3
Affiliations
Observational Study

The Role of WNT5a and TGF-β1 in Airway Remodelling and Severe Asthma

Tariq Daud et al. Allergy. 2025 Apr.

Abstract

Background: Airway remodelling is a feature of severe asthma with airway epithelial damage observed frequently. We evaluated the role of WNT5a and TGF-β1 in asthmatic airway biopsies and in sputum and bronchial brushings assessed their role in remodelling.

Methods: WNT5a and TGF-β1 protein expression were assessed in the lamina propria epithelium of people with asthma (GINA 1-3, n-8 and GINA 4-5, n-14) and healthy subjects (n-9), alongside relevant remodelling markers. The effects of WNT5a and TGF-β1 on BEAS-2B epithelial cell wound healing and differentiation were assessed in vitro. Replication was performed in the Unbiased Biomarkers for the Prediction of Respiratory Disease Outcomes (U-BIOPRED) study in sputum (n = 120) and bronchial brushes (n = 147).

Results: WNT5a and TGF-β1 protein expression were significantly increased in the airway epithelium and lamina propria in asthma patients with concurrent airflow limitation or severe disease. Furthermore, WNT5a protein expression in the lamina propria correlated with tissue eosinophils and vascular remodelling. Airway epithelial WNT5a was co-localised predominantly to airway basal cells and correlated with Th17 gene expression (r = 0.40, p = 0.025) and both the % intact (rs = 0.54, p = 0.001) and % denuded epithelium (rs = -0.39, p = 0.003). Experiments in BEAS-2B cells confirmed that WNT5a at maximal physiological concentrations (1 μg/mL), promoted epithelial wound healing, independently of TGF-β1, as well as induction of EMT-like morphology. WNT5a mRNA was associated with severe asthma, airflow limitation, sputum eosinophilia and Th2, and Th17 and neutrophil activation transcriptomes in sputum in U-BIOPRED.

Conclusion: WNT5a is associated with both airway remodelling and severe asthma.

Trial registration: ClinicalTrials.gov identifier: NCT01982162.

Keywords: TGF‐β1; WNT5a; airway remodelling; asthma.

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References

    1. S. Siddiqui, A. Shikotra, M. Richardson, et al., “Airway Pathological Heterogeneity in Asthma: Visualization of Disease Microclusters Using Topological Data Analysis,” Journal of Allergy and Clinical Immunology 142, no. 5 (2018): 1457–1468, https://doi.org/10.1016/j.jaci.2017.12.982.
    1. K. L. Raby, C. Michaeloudes, J. Tonkin, K. F. Chung, and P. K. Bhavsar, “Mechanisms of Airway Epithelial Injury and Abnormal Repair in Asthma and COPD,” Frontiers in Immunology 14 (2023): 1201658, https://doi.org/10.3389/fimmu.2023.1201658.
    1. J. E. Pongracz and R. A. Stockley, “Wnt Signalling in Lung Development and Diseases,” Respiratory Research 7 (2006): 15, https://doi.org/10.1186/1465‐9921‐7‐15.
    1. L. M. Crosby and C. M. Waters, “Epithelial Repair Mechanisms in the Lung,” American Journal of Physiology 298, no. 6 (2010): L715–L731, https://doi.org/10.1152/ajplung.00361.2009.
    1. F. Syed, C. C. Huang, K. Li, et al., “Identification of Interleukin‐13 Related Biomarkers Using Peripheral Blood Mononuclear Cells,” Biomarkers 12, no. 4 (2007): 414–423, https://doi.org/10.1080/13547500701192652.

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