Mapping lung cancer ventilation dynamics using functional imaging and lung mechanics.

Area of Science:

• Biomedical Engineering
• Respiratory Physiology
• Oncology Research

Background:

• Developing accurate in vivo models for human lung cancer is crucial for therapeutic strategy development and understanding drug resistance.
• Imaging lung tumors in live animals presents challenges due to lung location and respiratory motion.

Purpose of the Study:

• To assess the efficacy of X-ray velocimetry (XV) and flexiVent lung mechanics in evaluating lung function changes during tumor growth in mice.
• To determine the impact of tumor induction on lung function at 2-3 weeks post-induction.

Main Methods:

• Utilized X-ray velocimetry (XV) to map regional lung expansion during breathing.
• Employed flexiVent lung mechanics assessments to measure respiratory system parameters.
• Conducted histological analysis to quantify tumor burden and correlate with imaging and mechanics data.

Main Results:

• Tumor growth varied among individual mice.
• Significant differences in XV ventilation and flexiVent parameters were observed at 3 weeks post-tumor induction compared to baseline.
• Both XV and flexiVent metrics showed correlation with histological tumor counts.
• XV identified localized regions of altered lung expansion in some mice.

Conclusions:

• XV and flexiVent are effective tools for assessing lung function in a mouse model of lung cancer.
• These techniques can detect functional changes associated with tumor growth.
• The findings support the use of XV and flexiVent for monitoring lung tumor progression and response to therapy in preclinical research.