Enhancing biosafety in photodynamic therapy: progress and perspectives.

Area of Science:

• Oncology
• Photochemistry
• Biomedical Engineering

Background:

• Photodynamic therapy (PDT) is a promising cancer treatment utilizing reactive oxygen species (ROS).
• Enhancing photosensitizer (PS) efficacy and biosafety is crucial for PDT advancement.
• Traditional PSs cause significant side effects due to their 'always-ON' nature and prolonged photosensitivity.

Purpose of the Study:

• To review recent advancements in smart photosensitizers for improved PDT.
• To highlight smart PSs that offer enhanced cancer therapeutic functions with improved biosafety.
• To address limitations of conventional PDT and patient-related inconveniences.

Main Methods:

• Review of literature on smart photosensitizers in photodynamic therapy.
• Analysis of novel PS designs focusing on targeted activation and reduced systemic toxicity.
• Discussion of pharmacokinetic properties, including metabolism and clearance pathways.

Main Results:

• Smart PSs demonstrate high spatiotemporal selectivity and minimal drug resistance.
• Novel PS strategies significantly reduce phototoxic side effects compared to traditional PSs.
• Improved metabolism and clearance pathways enhance overall patient safety and treatment experience.

Conclusions:

• Smart photosensitizers represent a significant advancement in photodynamic therapy for cancer treatment.
• These novel PSs offer a safer and more effective alternative to conventional PDT, minimizing patient discomfort.
• Further research and clinical translation of smart PSs are essential for broader PDT application.