Recent advances in activatable fluorescence imaging probes for tumor imaging

Area of Science:

• Biomedical Imaging
• Molecular Probes
• Optical Diagnostics

Background:

• Fluorescence imaging offers high sensitivity and resolution but suffers from background noise.
• Tissue-selective strategies are crucial for improving tumor visualization in clinical settings.
• Activatable probes enhance tumor:background ratio (TBR) and provide molecular information, unlike 'always on' agents.

Purpose of the Study:

• To review recent advancements in activatable fluorescence probes for tumor imaging.
• To discuss the advantages and limitations of these probes in clinical translation.
• To highlight their role in improving tumor detection and molecular characterization.

Main Methods:

• Review of literature on activatable fluorescence probe development.
• Analysis of targeting strategies (passive, active, activatable) for improved TBR.
• Evaluation of probe activation mechanisms and their impact on imaging.

Main Results:

• Activatable probes significantly improve TBR by remaining nonfluorescent until target activation.
• These probes offer superior contrast and sensitivity compared to conventional methods.
• Activation by tumor-specific targets provides additional molecular information for staging and therapy monitoring.

Conclusions:

• Activatable fluorescence probes represent a significant advancement for sensitive and specific tumor imaging.
• Their ability to enhance TBR and provide molecular insights accelerates clinical translation.
• Further development is needed to overcome limitations and fully realize their potential in oncology.