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Blocking the HIF‐1α/glycolysis axis inhibits allergic airway inflammation by reducing ILC2 metabolism and function

炎症 先天性淋巴细胞 过敏性炎症 糖酵解 免疫学 生物 医学 免疫系统 内分泌学 先天免疫系统 新陈代谢
作者
Xiaogang Zhang,Jingping Liu,Xinyao Li,Guilang Zheng,Tian-Ci Wang,Hengbiao Sun,Zhengcong Huang,Junyu He,Ju Qiu,Zhibin Zhao,Yuxiong Guo,Yumei He
出处
期刊:Allergy [Wiley]
卷期号:80 (5): 1309-1334 被引量:30
标识
DOI:10.1111/all.16361
摘要

BACKGROUND: The role of lung group 2 innate lymphoid cell (ILC2) activation in allergic asthma is increasingly established. However, the regulatory mechanisms underlying hypoxia-inducible factor-1α (HIF-1α)-mediated glycolysis in ILC2-mediated allergic airway inflammation remain unclear. OBJECTIVE: To investigate the role of the HIF-1α/glycolysis axis in ILC2-mediated allergic airway inflammation. METHODS: Glycolysis and HIF-1α inhibitors were used to identify their effect on the function and glucose metabolism of mouse and human ILC2s in vivo and vitro. Blocking glycolysis and HIF-1α in mice under interleukin-33 (IL-33) stimulation were performed to test ILC2 responses. Conditional HIF-1α-deficient mice were used to confirm the specific role of HIF-1α in ILC2-driven airway inflammation models. Transcriptomic, metabolic, and chromatin immunoprecipitation analyses were performed to elucidate the underlying mechanism. RESULTS: HIF-1α is involved in ILC2 metabolism and is crucial in allergic airway inflammation. Single-cell sequencing data analysis and qPCR confirmation revealed a significant upregulation of glycolysis-related genes, particularly HIF-1α, in murine lung ILC2s after IL-33 intranasal administration or injection. Treatment with the glycolysis inhibitor 2-deoxy-D-glucose (2-DG) and the HIF-1α inhibitor 2-methoxyestradiol (2-ME) abrogated inflammation by suppressing ILC2s function. Conditional HIF-1α-deficient mice showed reduced ILC2 response and airway inflammation induced upon IL-33 or house dust mite (HDM) stimulation. Transcriptome and metabolic analyses revealed significantly impaired glycolysis in lung ILC2s in conditional HIF-1α knockout mice compared to that in their littermate controls. Chromatin immunoprecipitation results confirmed the transcriptional downregulation of glycolysis-related genes in HIF-1α-knockout and 2-DG-treated mice. Furthermore, impaired HIF-1α/glycolysis axis activation is correlated with downregulated ILC2 in patients with asthma. CONCLUSION: The HIF-1α/glycolysis axis is critical for controlling ILC2 responses in allergic airway inflammation and has potential immunotherapeutic value in asthma.
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