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Updated: Jun 21, 2026
04:43
Detection of Lung Tumor Progression in Mice by Ultrasound Imaging
Published on: February 27, 2020
HIF2alpha cooperates with RAS to promote lung tumorigenesis in mice
William Y Kim1, Samanthi Perera, Bing Zhou
1Lineberger Comprehensive Cancer Center, University of North Carolina, Chapel Hill, North Carolina 27599, USA. wykim@med.unc.edu
The Journal of Clinical Investigation
|August 8, 2009
Summary
Hypoxia-inducible factor 2-alpha (HIF2alpha) plays a causal role in non-small cell lung cancer (NSCLC) development and progression. This study demonstrates HIF2alpha promotes tumor growth, invasion, and angiogenesis in a mouse model, suggesting a link to poor patient prognosis.
Area of Science:
- Oncology
- Molecular Biology
- Cancer Research
Background:
- Hypoxia-inducible factor (HIF) transcription factors are key regulators of cellular response to low oxygen conditions.
- Elevated HIF2alpha levels in non-small cell lung cancer (NSCLC) correlate with reduced patient survival.
- The direct causal role of HIF2alpha in NSCLC pathogenesis remained undetermined.
Purpose of the Study:
- To investigate the causal role of HIF2alpha in lung tumor development and progression.
- To determine if HIF2alpha promotes invasive phenotypes and angiogenesis in vivo.
- To establish HIF2alpha as a potential therapeutic target in NSCLC.
Main Methods:
- Generation of genetically engineered mouse models conditionally expressing a nondegradable HIF2alpha variant and oncogenic Kras (KrasG12D) in the lungs.
- Comparative analysis of tumor growth, burden, survival, invasiveness, epithelial-mesenchymal transition (EMT) markers, and angiogenesis between different mouse groups.
- Assessment of circulating endothelial progenitor cell mobilization.
Main Results:
- Mice co-expressing Hif2a and KrasG12D exhibited larger tumors, increased tumor burden, and decreased survival compared to KrasG12D-only controls.
- Tumors with both KrasG12D and Hif2a showed enhanced invasiveness and features of epithelial-mesenchymal transition (EMT).
- Increased angiogenesis and mobilization of circulating endothelial progenitor cells were observed in tumors with high HIF2alpha levels.
Conclusions:
- HIF2alpha causally promotes lung cancer progression and tumor growth in a preclinical mouse model.
- HIF2alpha in vivo drives expression of EMT markers and contributes to tumor invasiveness.
- These findings implicate HIF2alpha as a significant driver of NSCLC pathogenesis and suggest its potential as a therapeutic target.
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