Two-photon uncageable enzyme inhibitors bearing targeting vectors

Area of Science:

• Medicinal Chemistry
• Biotechnology
• Enzyme Inhibitor Development

Background:

• Cyclooxygenase-2 (COX-2) inhibitors are crucial for managing inflammation and pain.
• Targeted drug delivery remains a challenge, necessitating methods for precise activation within specific cells.
• Photocage technology offers a potential solution for spatiotemporal control of drug activity.

Purpose of the Study:

• To develop photocaged cyclooxygenase-2 (COX-2) inhibitors for targeted cellular delivery and activation.
• To investigate the efficacy of peptide-functionalized photocages for specific cell targeting.
• To demonstrate the reactivation of COX-2 inhibition using two-photon excitation with near-infrared light.

Main Methods:

• Synthesis of photocages by coupling Celecoxib and Lumiracoxib to photo-labile protecting groups.
• Functionalization of photocages with peptide targeting vectors for enhanced cellular specificity.
• Evaluation of enzyme inhibition before and after two-photon excitation at 800 nm.

Main Results:

• Photocaging successfully suppressed the activity of Celecoxib and Lumiracoxib.
• Peptide functionalization facilitated targeted delivery of the photocaged inhibitors.
• Two-photon excitation at 800 nm efficiently restored the cyclooxygenase-2 inhibitory activity.

Conclusions:

• Photocaged COX-2 inhibitors can be designed for targeted delivery and light-triggered activation.
• This approach offers precise spatiotemporal control over enzyme inhibition.
• The developed system holds promise for advanced therapeutic strategies requiring localized drug action.