A Simple Small Molecule with Synergistic Passive and Active Dual-Targeting Effects for Imaging-Guided Photothermal...

Area of Science:

• Biomedical Engineering
• Nanotechnology
• Oncology

Background:

• Photothermal therapy offers precise, image-guided cancer treatment.
• Developing tumor-specific photothermal transduction agents (PTAs) for effective accumulation and imaging while minimizing healthy tissue toxicity remains a challenge.

Purpose of the Study:

• To develop a novel cyclooxygenase-2-specific small-organic-molecule-based PTA for enhanced tumor targeting and imaging-guided photothermal therapy.
• To investigate the self-assembly, photothermal, and photoacoustic properties of the developed PTA for precision theranostics.

Main Methods:

• Synthesis of a cyclooxygenase-2-specific small-organic-molecule PTA (Cy7-TCF-IMC).
• Self-assembly of Cy7-TCF-IMC into nanosaucers.
• Evaluation of passive (EPR effect) and active targeting for tumor accumulation.
• Assessment of photothermal and photoacoustic properties.
• In vivo evaluation of tumor ablation using photoacoustic imaging guidance.

Main Results:

• Cy7-TCF-IMC self-assembles into nanosaucers with unique photothermal and photoacoustic properties.
• Nanosaucers demonstrate preferential tumor accumulation via synergistic passive and active targeting.
• Effective tumor ablation achieved using photoacoustic imaging-guided photothermal therapy with Cy7-TCF-IMC nanosaucers.

Conclusions:

• The self-assembled Cy7-TCF-IMC nanosaucer is a promising single-component supramolecular medicine for precision cancer theranostics.
• This approach synergistically optimizes passive and active targeting, enhancing the therapeutic index.
• The findings suggest a new paradigm for improving cancer treatment outcomes and future clinical applications.