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Three-Dimensional Cell Culture Models to Investigate the Epithelial Barrier in Eosinophilic Esophagitis
Published on: May 10, 2024
Eosinophils induce airway smooth muscle cell proliferation
Rabih Halwani1, Alejandro Vazquez-Tello, Yuki Sumi
1Asthma Research Chair and Prince Naif Center for Immunology Research, College of Medicine, King Saud University, Riyadh, Saudi Arabia.
Journal of Clinical Immunology
|November 27, 2012
Summary
Eosinophils from asthmatics promote airway smooth muscle cell proliferation through cysteinyl leukotrienes (CysLTs) release upon direct contact. This interaction contributes to airway remodeling in asthma and presents a therapeutic target.
Area of Science:
- Immunology
- Pulmonology
- Cell Biology
Background:
- Asthma involves eosinophilic airway inflammation and airway remodeling, including increased airway smooth muscle (ASM) mass.
- The interaction between eosinophils and ASM cells in asthma pathogenesis is not well understood.
Purpose of the Study:
- To investigate the effect of eosinophils on ASM cell proliferation.
- To elucidate the role of eosinophil-derived mediators in this interaction.
Main Methods:
- Co-culture of human primary ASM cells with eosinophils isolated from asthmatic and non-asthmatic subjects.
- Assessment of ASM proliferation via Ki-67 expression assay.
- Measurement of extracellular matrix (ECM) mRNA and leukotriene release (ELISA).
- Inhibition studies using anti-adhesion molecules and leukotriene antagonists (montelukast).
Main Results:
- Eosinophils from asthmatics significantly increased ASM proliferation compared to those from non-asthmatics.
- This proliferation was dependent on eosinophil-derived cysteinyl leukotrienes (CysLTs) and required direct eosinophil-ASM cell contact.
- ECM protein release was not affected.
- Blocking CysLTs or eosinophil-ASM contact inhibited proliferation.
Conclusions:
- Eosinophils contribute to asthma-related airway remodeling by enhancing ASM cell proliferation.
- Direct eosinophil-ASM cell contact triggers CysLTs release, promoting ASM proliferation.
- Targeting eosinophil-ASM cell interactions and CysLTs offers a potential therapeutic strategy for asthma.
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