Volume 76, Issue 1 pp. 255-268
ORIGINAL ARTICLE

Estrogen receptor-α signaling increases allergen-induced IL-33 release and airway inflammation

Jacqueline-Yvonne Cephus

Jacqueline-Yvonne Cephus

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Vivek D. Gandhi

Vivek D. Gandhi

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Ruchi Shah

Ruchi Shah

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Jordan Brooke Davis

Jordan Brooke Davis

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Hubaida Fuseini

Hubaida Fuseini

Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee, USA

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Jeffrey A. Yung

Jeffrey A. Yung

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Jian Zhang

Jian Zhang

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Hirohito Kita

Hirohito Kita

Allergic Diseases Research Laboratory, Mayo Clinic, Phoenix, Arizona, USA

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Vasiliy V. Polosukhin

Vasiliy V. Polosukhin

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Weisong Zhou

Weisong Zhou

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

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Dawn C. Newcomb

Corresponding Author

Dawn C. Newcomb

Department of Medicine, Division of Allergy, Pulmonary, and Critical Care Medicine, Vanderbilt University Medical Center, Nashville, Tennessee, USA

Department of Pathology, Microbiology, and Immunology, Vanderbilt University, Nashville, Tennessee, USA

Correspondence

Dawn C. Newcomb, Vanderbilt University Medical Center, 1161 21st Avenue, T-1218 MCN, 1161 21st Avenue, T-1218 MCN, Nashville, TN 37232.

Email: [email protected]

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First published: 10 July 2020
Citations: 52

Abstract

Background

Group 2 innate lymphoid cells (ILC2) are stimulated by IL-33 to increase IL-5 and IL-13 production and airway inflammation. While sex hormones regulate airway inflammation, it remained unclear whether estrogen signaling through estrogen receptor-α (ER-α, Esr1) or ER-β (Esr2) increased ILC2-mediated airway inflammation. We hypothesize that estrogen signaling increases allergen-induced IL-33 release, ILC2 cytokine production, and airway inflammation.

Methods

Female Esr1-/-, Esr2-/-, wild-type (WT), and IL33fl/fleGFP mice were challenged with Alternaria extract (Alt Ext) or vehicle for 4 days. In select experiments, mice were administered tamoxifen or vehicle pellets for 21 days prior to challenge. Lung ILC2, IL-5 and IL-13 production, and BAL inflammatory cells were measured on day 5 of Alt Ext challenge model. Bone marrow from WT and Esr1-/- female mice was transferred (1:1 ratio) into WT female recipients for 6 weeks followed by Alt Ext challenge. hBE33 cells and normal human bronchial epithelial cells (NHBE) were pretreated with 17β-estradiol (E2), propyl-pyrazole-triol (PPT, ER-α agonist), or diarylpropionitrile (DPN, ER-β agonist) before allergen challenge to determine IL-33 gene expression and release, extracellular ATP release, DUOX-1 production, and necrosis.

Results

Alt Ext challenged Esr1-/-, but not Esr2-/-, mice had decreased IL-5 and IL-13 production, BAL eosinophils, and IL-33 release compared to WT mice. Tamoxifen decreased IL-5 and IL-13 production and BAL eosinophils. IL-33eGFP + epithelial cells were decreased in Alt Ext challenged Esr1-/- mice compared to WT mice. 17β-E2 or PPT, but not DPN, increased IL-33 gene expression, release, and DUOX-1 production in hBE33 or NHBE cells.

Conclusion

Estrogen receptor -α signaling increased IL-33 release and ILC2-mediated airway inflammation.

Graphical Abstract

Allergen-induced airway inflammation is increased by estrogen signaling. Compared to WT mice, Alt Ext challenged Esr1 −/− mice have decreased IL-5 and IL-13 production, eosinophils number, and IL-33 release. Estrogen receptor-α signaling has no direct effect on ILC2 proliferation or cytokine expression. Abbreviations: Alt Ext, Alternaria extract; DPN, diarylpropionitrile; E2, 17β-estradiol; Eos, eosinophils; Esr1 −/−, estrogen receptor alpha deficient mice; ER-α, estrogen receptor α; ILC2, group 2 innate lymphoid cells; PPT, propyl-pyrazole-triol; WT, wild-type

CONFLICTS OF INTEREST

The authors have no conflict of interest in relation to this work.

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