Polymeric Micelles as Smart Nanocarriers in Photodynamic Cancer Therapy

1. Introduction

Photodynamic therapy (PDT) has emerged as a promising cancer treatment due to its minimal invasiveness and reduced risk of damaging healthy tissues, thus easing the burden on patients. PDT involves the administration of a photosensitizer and the application of specific wavelengths of light to induce targeted photochemical reactions. However, post-treatment residual photosensitizers can cause phototoxicity upon exposure to sunlight, posing a significant challenge. To address this issue, drug delivery systems (DDS) have gained attention for their ability to control drug distribution, enhancing therapeutic efficacy while minimizing side effects.

2. Result and Discussion

In this study, we investigated the use of polymeric micelles as nanocarriers for photosensitizers. These micelles offer tumor-targeted delivery and low systemic toxicity. Photosensitizer-containing block copolymers were synthesized and evaluated for phototoxicity using HT29 cells. The results demonstrated considerable cell toxicity upon light exposure, indicating effective PDT activity. These findings suggest that polymeric micelles represent a promising DDS platform to improve the safety and effectiveness of photodynamic cancer therapy.

3. Experimental part

Polymeric micelles were synthesized via reversible addition–fragmentation chain-transfer (RAFT) polymerization. The cytotoxicity of the obtained compounds was assessed through an MTT assay using HT29 human colon cancer cells.

4. Reference

[1] Y. Uruma; H. Yao; B. Altannavch; N. Hara; C. Lu; P.S. Lai Results in Chemistry 2024 DOI: 10.1016/j.rechem.2024.101499