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Published on: February 28, 2019
[HIF-1alpha and CA IX expression in nasal polyps and study on their correlation]
Hai Lin1, Dong Lin, Xianming Chen
1Department of Otorhinolaryngology-Head and Neck Surgery, Fuzhou General Hospital of Nanjing Command of PLA, Fuzhou, 350025, China. linh96@163.com
Summary
Hypoxia inducible factor-1alpha (HIF-1alpha) and carbonic anhydrase IX (CA IX) are overexpressed in nasal polyps, correlating closely with disease pathogenesis. This study highlights their role in adapting to hypoxic conditions and promoting polyp growth.
Area of Science:
- Otorhinolaryngology
- Molecular Biology
- Pathophysiology
Background:
- Nasal polyps are inflammatory growths associated with chronic sinonasal disease.
- The role of hypoxia and related molecular markers in nasal polyp development is not fully understood.
Purpose of the Study:
- To investigate the expression levels of hypoxia inducible factor-1alpha (HIF-1alpha) and carbonic anhydrase IX (CA IX) in nasal polyps.
- To analyze the correlation between HIF-1alpha and CA IX expression.
- To elucidate the involvement of HIF-1alpha and CA IX in the pathogenesis of nasal polyps.
Main Methods:
- Immunohistochemistry was employed to detect HIF-1alpha and CA IX expression.
- Quantitative image analysis was used to compare expression levels between nasal polyps (n=28) and normal inferior turbinate mucosa (n=12).
- Spearman correlation analysis assessed the relationship between HIF-1alpha and CA IX.
Main Results:
- Significantly higher expression of HIF-1alpha and CA IX was observed in nasal polyps compared to controls (P < 0.05).
- A strong positive correlation was found between HIF-1alpha and CA IX expression in nasal polyps (r = 0.820, P < 0.01).
- Image analysis revealed increased integrated optical density (IOD) for both markers in polyps.
Conclusions:
- HIF-1alpha and CA IX are overexpressed in nasal polyps, indicating a role in the disease.
- The findings suggest hypoxia is present in nasal polyps, potentially exacerbated by inflammation and metabolic disorders.
- HIF-1alpha activation promotes CA IX expression, aiding cellular adaptation to hypoxia and contributing to polyp formation and growth.
