Creating a picture of brown fat with creatine-CEST.

Area of Science:

• Metabolism
• Biophysics
• Medical Imaging

Background:

• Accurate, non-invasive assessment of brown adipose tissue (BAT) thermogenesis is crucial for metabolic research.
• Current methods for measuring BAT activity face limitations in precision and accessibility.

Purpose of the Study:

• To develop and validate a non-invasive imaging technique for quantifying brown fat thermogenesis.
• To utilize the unique metabolic signature of thermogenic adipocytes for tracking their activity.

Main Methods:

• Employing a magnetic resonance imaging (MRI) technique sensitive to endogenous creatine levels.
• Leveraging the futile creatine cycling pathway present in thermogenic adipocytes.
• Validating the technique in both rodent models and human subjects.

Main Results:

• The developed MRI technique accurately tracks brown fat thermogenesis.
• Endogenous creatine levels, measured by MRI, serve as a reliable biomarker for BAT activity.
• Successful demonstration of the technique's efficacy in both animal and human studies.

Conclusions:

• A novel MRI approach enables accurate, non-invasive assessment of brown fat thermogenesis.
• This technique offers a promising tool for metabolic research and clinical applications.
• Measuring creatine levels via MRI provides a faithful readout of brown fat metabolic activity.