Hyperpolarized MRI for Studying Tumor Metabolism.

Area of Science:

• Biomedical Imaging
• Metabolic Imaging
• Preclinical Cancer Research

Background:

• Hyperpolarized magnetic resonance imaging (MRI) offers real-time in vivo tumor metabolism detection.
• The dissolution dynamic nuclear polarization (DNP) method enhances signal polarization for ¹³C-labeled molecules like [1-¹³C]pyruvate.

Purpose of the Study:

• To describe the methodology and data analysis for preclinical hyperpolarized pyruvate MRI experiments.
• To illustrate the potential of hyperpolarized MRI in assessing tumor metabolic status.

Main Methods:

• Injection of hyperpolarized [1-¹³C]pyruvate into animal models during MRI scanning.
• Utilizing dissolution dynamic nuclear polarization to increase signal polarization.
• Imaging the metabolic conversion of pyruvate to lactate and other products.

Main Results:

• Achieved significantly higher observed signals due to increased polarization.
• Enabled detection and imaging of metabolic pathways involving ¹³C-labeled pyruvate.
• Demonstrated the feasibility of assessing tumor metabolism in vivo.

Conclusions:

• Hyperpolarized pyruvate MRI is a powerful tool for real-time metabolic imaging in preclinical cancer research.
• This technique can provide valuable insights into tumor metabolic status, particularly during therapeutic interventions.