Functional imaging in drug discovery and development.

Area of Science:

• Pharmacology
• Medical Imaging
• Drug Development

Background:

• In vivo imaging techniques, including radioisotope and magnetic resonance-based methods, are increasingly utilized across drug development.
• While clinical diagnosis remains their primary application, these versatile technologies can be adapted for diverse research purposes.

Purpose of the Study:

• To highlight the expanding role of in vivo imaging in drug development.
• To discuss the adaptation of imaging techniques for measuring drug targets, disposition, action, and disease pathophysiology.
• To emphasize the importance of considering imaging technique characteristics for optimal application selection.

Main Methods:

• Review of radioisotope-based imaging (e.g., PET, SPECT) and magnetic resonance-based imaging (e.g., MRI, fMRI) principles.
• Discussion of how these techniques can be applied to various stages of drug development.
• Comparison of key performance metrics: sensitivity, spatial resolution, temporal resolution, and measurement frequency.

Main Results:

• In vivo imaging offers versatile applications beyond clinical diagnosis in drug development.
• Techniques can be tailored to investigate drug targets, tissue-specific drug disposition and action, and disease pathophysiology.
• Significant differences exist in sensitivity, resolution, and frequency between radioisotope and magnetic resonance imaging.

Conclusions:

• The selection of an appropriate functional imaging approach is critical and depends on the specific application.
• Careful consideration of imaging technique characteristics ensures effective use in drug development and disease research.
• In vivo imaging provides powerful tools for understanding drug action and disease mechanisms.