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The use of PET imaging to detect and quantify receptor occupancy (RO) has become a translational standard in CNS discovery and clinical trials. For example, 18F radiolabeling of targeted small molecules enables a PET tracer-based PD biomarker. The tracer can be used for dynamic, non-invasive quantification of percentage RO.

For relevant targets, rodent models can be used to quickly and efficiently:

  • Screen for specificity
  • Validate the target using a cold blocking compound
  • Generate a full dose-RO curve
  • Compare candidate molecules
  • Promising molecules can then be more confidently selected for NHP and/or first in human studies. This inherently also allows quantification of RO, and correlation with efficacy in future translational work.
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