Telomerase triggered drug release using a SERS traceable nanocarrier

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Telomerase is a key biomarker and therapeutic target in cancer.
• Existing drug delivery systems often lack specificity, leading to off-target effects.
• There is a need for targeted drug delivery systems that respond to cancer-specific triggers.

Purpose of the Study:

• To develop a stimuli-responsive nanocarrier for targeted drug delivery.
• To utilize telomerase as a trigger for drug release specifically in cancer cells.
• To create a traceable nanocarrier system for monitoring drug delivery dynamics.

Main Methods:

• Mesoporous silica nanoparticles with an inner metal core were synthesized as nanocarriers.
• Drugs were loaded into the nanoparticle pores and sealed with a telomerase-cleavable oligonucleotide strand (CAP1).
• The metal core was utilized as a surface-enhanced Raman scattering (SERS) substrate for nanocarrier tracing.

Main Results:

• The CAP1 strand effectively blocked drug leakage until exposed to telomerase.
• Telomerase activity triggered the release of loaded drugs by degrading the CAP1 strand.
• The SERS signal allowed for real-time tracing of the nanocarriers.
• Drug release was demonstrated to be specific to cells with high telomerase expression.

Conclusions:

• A novel, telomerase-responsive nanocarrier system was successfully developed.
• This system enables targeted drug release in cancer cells, minimizing off-target effects.
• The SERS-traceable nature of the nanocarrier facilitates the study of drug delivery dynamics.