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Novel hypoxia-induced HIF-1αactivation in asthma pathogenesis
Mengzhi Wan1, Qi Yu1, Fei Xu1
1Department of Respiratory Emergency and Critical Care Medicine, The First Affiliated Hospital of Nanchang University, No. 17, Yongwai Zheng Street, Nanchang, Jiangxi Province, 330006, PR China.
Respiratory Research
|July 26, 2024
Summary
Hypoxia-Inducible Factor-1 Alpha (HIF-1α) promotes asthma exacerbation by enhancing airway smooth muscle cell functions via P53 ubiquitination. Targeting the HIF-1α-MDM2-P53 pathway offers potential new asthma treatments.
Area of Science:
- Respiratory medicine
- Molecular biology
- Cellular pathology
Background:
- Asthma involves complex airway inflammation and remodeling, exacerbated by hypoxia.
- Hypoxia-Inducible Factor-1 Alpha (HIF-1α) and P53 ubiquitination are implicated in asthma pathogenesis.
Purpose of the Study:
- To investigate the role of the HIF-1α-MDM2-P53 axis in asthma exacerbation.
- To explore potential therapeutic targets for asthma.
Main Methods:
- Utilized high-throughput sequencing and bioinformatics for gene association analysis.
- Developed in vivo asthma mouse models and in vitro hypoxia models using airway smooth muscle cells (ASMCs).
- Assessed cell functions (viability, proliferation, migration, apoptosis) and performed ELISA and H&E staining.
Main Results:
- HIF-1α was significantly upregulated in asthma models.
- HIF-1α promoted ASMC viability, proliferation, and migration while inhibiting apoptosis, mediated by MDM2-induced P53 ubiquitination.
- Inhibition of this pathway with IDF-11,774 reduced airway inflammation and structural changes in vivo.
Conclusions:
- The HIF-1α-MDM2-P53 axis is crucial in asthma exacerbation.
- Modulating this pathway presents a promising therapeutic strategy for asthma treatment.
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