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Updated: Dec 25, 2025
Photodynamic Therapy with Blended Conducting Polymer/Fullerene Nanoparticle Photosensitizers
Published on: October 28, 2015
A versatile and multifunctional metal-organic framework nanocomposite toward chemo-photodynamic therapy
Ying Pan1, Zhidong Luo1, Xiaoxiong Wang2
1Guangdong Key Laboratory for Research and Development of Natural Drugs, Key Laboratory of Research and Development of New Medical Materials of Guangdong Medical University, School of Pharmacy, Guangdong Medical University, Dongguan, 523808, China. jianqiangliu8@gdmu.edu.cn.
This study introduces a novel drug delivery system using MOFs decorated with pemetrexed (MTA) for enhanced tumor targeting. This new system outperforms folic acid-based targeting and combines chemotherapy with photodynamic therapy for improved efficacy.
Area of Science:
- Materials Science
- Nanotechnology
- Biomedical Engineering
Background:
- Traditional drug delivery systems often rely on the enhanced permeability and retention (EPR) effect using folic acid (FA) for tumor targeting.
- While effective to some extent, FA-based targeting may have limitations and side effects.
- There is a need for alternative targeting strategies in nanomedicine.
Purpose of the Study:
- To develop a novel metal-organic framework (MOF) based drug delivery system utilizing a pemetrexed (MTA) targeting molecule.
- To evaluate the targeting efficacy of the MTA-modified MOF compared to FA-modified MOF.
- To assess the therapeutic effectiveness of combining chemotherapy and photodynamic therapy using this new system.
Main Methods:
- Surface decoration of UIO-66 MOFs with 5-amino-levulinic acid (ALA), 5-carboxyfluorescein (FAM), and either MTA or FA.
- Confocal microscopy and flow cytometry to assess cellular uptake and targeting efficiency.
- Cytotoxicity experiments to compare the efficacy of combined therapy versus single therapies.
Main Results:
- The ALA@UIO-66-NH-FAM/MTA system demonstrated superior targeting ability compared to ALA@UIO-66-NH-FAM/FA.
- Targeting efficacy increased with higher expression of folate receptors on tumor cell membranes.
- Combined chemotherapy and photodynamic therapy showed greater effectiveness than individual treatment modalities.
Conclusions:
- This research presents the first application of a folic acid antagonist (MTA) for modifying nanostructured MOFs (NMOFs).
- The MTA-modified MOF offers a promising new platform for folate receptor-targeted drug delivery.
- This strategy provides a novel concept for designing MOFs with enhanced clinical applicability for cancer therapy.
