ArticleInternational journal of molecular sciences2024
Co-Stimulation with TWEAK and TGF-β1 Induces Steroid-Insensitive TSLP and CCL5 Production in BEAS-2B Human Bronchial Epithelial Cells.
Article in International journal of molecular sciences, 2024. 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
Steroid-resistant asthma is a common cause of refractory asthma. Type 2 inflammation is the main inflammatory response in asthma, and the mechanism underlying the steroid-resistance of type 2 inflammation has not been completely elucidated. Tumor-necrosis-factor-like apoptosis-inducing factor (TWEAK) and transforming growth factor (TGF)-β1 are involved in epithelial-mesenchymal transition (EMT) and the production of thymic stromal lymphopoietin (TSLP) and C-C motif chemokine ligand 5 (CCL5). We herein hypothesize that the combined exposure to TWEAK and TGF-β1 may result in the development of steroid resistance in bronchial epithelial cells. The bronchial epithelial cell line BEAS-2B was cultured with or without TGF-β1 or TWEAK, in the presence or absence of dexamethasone (DEX). The roles of Smad-independent pathways and MAP kinase phosphatase 1 (MKP-1) were also explored. Co-stimulation of TWEAK and TGF-β1 induced E-cadherin reduction, N-cadherin upregulation, and TSLP and CCL5 production, which were not suppressed by DEX. Inhibition of the nuclear factor kappa beta (NF-κB) and mitogen-activated protein kinase pathways downregulated steroid-unresponsive TSLP and CCL5 production, whereas knockdown of MKP-1 improved steroid-unresponsive TSLP production, induced by co-stimulation with TWEAK and TGF-β1. Therefore, co-stimulation with TWEAK and TGF-β1 can induce the steroid-insensitive production of TSLP and CCL5 in the bronchial epithelium and may contribute to airway inflammation.
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