Related Experiment Video
Updated: Jun 15, 2025
09:45
Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
8.5K
A potent mannose-modified pillararene-BODIPY system for photodynamic therapy
Pitiphoom Sangiamkittikul1, Sopon Nuchpun2, Kanlaya Prapainop Katewongsa2
1Department of Chemistry and Center of Excellence for Innovation in Chemistry (PERCH-CIC), Faculty of Science, Mahidol University, Bangkok, Thailand. supavadee.mon@mahidol.ac.th.
Journal of Materials Chemistry. B
|June 13, 2025
Summary
A novel supramolecular photosensitizer, PS3⊂WP5, enhances photodynamic therapy (PDT) for cancer treatment. This nanoparticle formulation improves water solubility, cellular uptake, and PDT efficacy while reducing side effects.
Area of Science:
- Nanomedicine
- Photochemistry
- Supramolecular Chemistry
Background:
- Photodynamic therapy (PDT) is a promising non-invasive cancer treatment.
- Traditional photosensitizers face limitations including poor water solubility, low cellular uptake, and dose-related side effects.
- Developing novel photosensitizers is crucial for improving PDT efficacy and clinical applicability.
Purpose of the Study:
- To design and characterize a novel supramolecular photosensitizer for enhanced cancer phototherapy.
- To evaluate the photophysical properties and self-assembly behavior of the supramolecular complex.
- To assess the *in vitro* efficacy, biocompatibility, and toxicity of the supramolecular photosensitizer compared to its free counterpart.
Main Methods:
- Synthesis and characterization of a host-guest complex (PS3⊂WP5) using a mannosylated pillar[5]arene (WP5) and a BODIPY photosensitizer (PS3).
- Investigation of binding affinity, self-assembly into nanoparticles in aqueous solution, and photophysical properties (singlet oxygen quantum yield, photostability).
- Evaluation of *in vitro* PDT efficacy, cellular uptake, biocompatibility, and dark toxicity in cancer cells.
Main Results:
- The supramolecular complex PS3⊂WP5 exhibited strong binding affinity (Ka = 5.10 × 10^6 M^-1) and self-assembled into nanoparticles.
- PS3⊂WP5 demonstrated a high singlet oxygen quantum yield (ΦΔ = 0.95) and excellent photostability upon irradiation at 633 nm.
- *In vitro* studies showed superior PDT efficacy, good biocompatibility, and low dark toxicity for PS3⊂WP5 compared to free PS3.
Conclusions:
- The supramolecular approach effectively overcomes the limitations of free photosensitizers, such as poor aqueous solubility and low cellular uptake.
- PS3⊂WP5 represents a promising multifunctional nanomaterial for advanced cancer phototherapy.
- This strategy holds potential for developing more efficient PDT agents with improved clinical outcomes.
