Hydrogels: soft matters in photomedicine

Area of Science:

• Biomedical Engineering
• Photomedicine
• Materials Science

Background:

• Photodynamic therapy (PDT) uses light, oxygen, and photosensitizers (PSs) to treat diseases.
• Current PDT limitations include poor PS solubility, side effects like photosensitivity, and lack of targeting.
• Polymer-based drug delivery systems, especially hydrogels, are explored to overcome these challenges.

Purpose of the Study:

• To review the use of hydrogels as carrier systems for photosensitizers in PDT.
• To highlight the potential of hydrogel-based formulations in enhancing PDT efficacy.
• To discuss broader applications of hydrogels in photomedicine and related fields.

Main Methods:

• Review of existing literature on hydrogel-based photosensitizer delivery for PDT.
• Analysis of hydrogel properties relevant to PDT applications (swelling, biocompatibility).
• Discussion of hydrogel formulations for improved PS solubility, targeting, and reduced side effects.

Main Results:

• Hydrogels effectively encapsulate photosensitizers, improving their solubility and stability.
• Hydrogel formulations enhance the selectivity and targeting of PDT, minimizing damage to healthy tissues.
• Hydrogels show potential for overcoming key limitations of conventional PDT.

Conclusions:

• Hydrogels represent an advanced platform for developing effective and safe PDT formulations.
• These systems hold significant promise for treating cancer and infectious diseases.
• Further applications in tissue engineering, photoremediation, and photochemistry are anticipated.