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Alzahrani A, Hakeem J, Biddle M, Alhadian F, Hussain A, Khalfaoui L, Roach KM, Tliba O, Bradding P, Amrani Y. Human Lung Mast Cells Impair Corticosteroid Responsiveness in Human Airway Smooth Muscle Cells. Front Allergy 2021; 2:785100. [PMID: 35387008 PMCID: PMC8974721 DOI: 10.3389/falgy.2021.785100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2021] [Accepted: 11/24/2021] [Indexed: 11/13/2022] Open
Abstract
The mechanisms underlying corticosteroid insensitivity in severe asthma have not been elucidated although some indirect clinical evidence points toward a role of mast cells. Here, we tested the hypothesis that mast cells can drive corticosteroid insensitivity in airway smooth muscle cells, a key player in asthma pathogenesis. Conditioned media from resting or FcεR1-activated human lung mast cells were incubated with serum-deprived ASM cells (1:4 dilution, 24 h) to determine their impact on the anti-inflammatory action of fluticasone on ASM cell chemokine expression induced by TNFα (10 ng/ml). Conditioned media from FcεR1-activated mast cells (but not that from non-activated mast cells or control media) significantly reduced the ability of 100 nM fluticasone to suppress ASM TNFα-dependent CCL5 and CXCL10 production at both mRNA and protein levels. In contrast, fluticasone inhibition of CXCL-8 production by TNFα was still preserved in the presence of activated mast cell conditioned media. Transcriptomic analysis validated by individual qPCR assays revealed that activated mast cell conditioned media dramatically reduced the number of anti-inflammatory genes induced by fluticasone in ASM cells. Our study demonstrates for the first time that conditioned media from FcεR1-activated mast cells blunt the anti-inflammatory action of corticosteroids in ASM cells by altering their transactivation properties. Because infiltration of mast cells within the ASM bundles is a defining feature of asthma, mast cell-derived mediators may contribute to the glucocorticoid insensitivity present in severe asthma.
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Affiliation(s)
- Abdulrahman Alzahrani
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
- Department of Applied Medical Sciences, Applied College, Albaha University, Albaha, Saudi Arabia
| | - Jameel Hakeem
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Michael Biddle
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Fahad Alhadian
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Aamir Hussain
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Latifa Khalfaoui
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Katy M. Roach
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Omar Tliba
- Department of Biomedical Sciences, College of Veterinary Medicine, Long Island University, Brookville, NY, United States
| | - Peter Bradding
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
| | - Yassine Amrani
- Department of Respiratory Sciences, Clinical Sciences, University of Leicester, Glenfield Hospital, Leicester, United Kingdom
- *Correspondence: Yassine Amrani
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Alzahrani A, Hussain A, Alhadian F, Hakeem J, Douaoui S, Tliba O, Bradding P, Amrani Y. Potential Role of Mast Cells in Regulating Corticosteroid Insensitivity in Severe Asthma. Adv Exp Med Biol 2021; 1303:1-12. [PMID: 33788184 DOI: 10.1007/978-3-030-63046-1_1] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
Abstract
The mechanisms driving corticosteroid insensitivity in asthma are still unclear although evidence points toward a potential role of lung mast cells. Indeed, a number of in vitro studies using various cell types showed that different mediators produced by activated mast cells, including cytokines, have the capacity to interfere with the therapeutic action of corticosteroids. In patients with severe allergic refractory asthma, the anti-IgE monoclonal antibody (mAb), Omalizumab, has been shown to be associated with a marked reduction in inhaled and systemic use of corticosteroids, further suggesting a key role of mast cells in the poor response of patients to these drugs. The present chapter will discuss the possible underlying mechanisms by which mast cells could contribute to reducing corticosteroid sensitivity seen in patients with severe asthma.
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Affiliation(s)
- Abdulrahman Alzahrani
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Aamir Hussain
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Fahad Alhadian
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Jameel Hakeem
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Sana Douaoui
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Omar Tliba
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Peter Bradding
- Department of Infection, Immunity and Inflammation, Clinical Sciences, University of Leicester, Leicester, UK
| | - Yassine Amrani
- Department of Respiratory Sciences, University of Leicester, Leicester, UK.
- Institute for Lung Health, Leicester Biomedical Research Center Respiratory, Leicester, UK.
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