Synergistically increased ILC2 and Th9 cells in lung tissue jointly promote the pathological process of asthma in mice

Ying,Xinyu; Su,Zhaoliang; Bie,Qingli; Zhang,Pan; Yang,Huijian; Wu,Yumin; Xu,Yunyun; Wu,Jing; Zhang,Mengying; Wang,Shengjun; Xu,Huaxi

doi:10.3892/mmr.2016.5174

Synergistically increased ILC2 and Th9 cells in lung tissue jointly promote the pathological process of asthma in mice

Authors:
- Xinyu Ying
- Zhaoliang Su
- Qingli Bie
- Pan Zhang
- Huijian Yang
- Yumin Wu
- Yunyun Xu
- Jing Wu
- Mengying Zhang
- Shengjun Wang
- Huaxi Xu
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Affiliations: Department of Immunology, School of Medicine, Jiangsu University, Zhenjiang, Jiangsu 212013, P.R. China
Published online on: April 25, 2016 https://doi.org/10.3892/mmr.2016.5174
Pages: 5230-5240

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Abstract

In recent years, T helper (Th) 9 cells have been demonstrated to be key mediators in immune responses in asthmatic lungs, and innate lymphoid cells 2 (ILC2s) have been described as a novel type of innate immunocyte with the ability to enhance immunoglobulin E (IgE) production. However, the interaction between ILC2s and Th9 cells in the pulmonary system of a mouse model of asthma remains to be elucidated. In the present study, the response state of lung tissue with regards to Th9 and ILC2s in a mouse model of asthma was investigated by detecting Th9‑ and ILC2‑associated cytokine receptors. The present study also investigated the association between the expression levels of the cytokine receptors in lung tissue samples and the IgE levels in sera samples from mouse models of asthma. Results from the present study demonstrated that the frequency of ILC2s and Th9 cells was significantly increased in the lung tissue samples, indicating that a Th2-type immune response had occurred. In addition, high mRNA expression levels of RAR‑related orphan receptor α, interleukin 1 receptor‑like 1, transcription factor PU.1 and interleukin (IL)‑9 were observed. Furthermore, IL‑5Rα, IL‑13Rα2 and high‑affinity IgE receptor were increased in mouse models of asthma, and a positive association was observed between the expression levels of ILC2‑ or Th9‑associated receptors in tissue samples and IgE levels in the sera. This indicated that ILC2s and Th9 were in a state of polarization and may promote each other in the lung tissue of mouse models of asthma, and that the lung tissue was responding to the two types of cells via increased expression of receptors.

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