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Published on: February 8, 2017
Light-responsive polymersomes with a charge-switch for targeted drug delivery.
Yaowu Zhou1, Rongrong Chen1, Huiting Yang1
1Optogenetics & Synthetic Biology Interdisciplinary Research Center, State Key Laboratory of Bioreactor Engineering, East China University of Science and Technology, 130# Meilong Road, Shanghai 200237, China. baochunyan@ecust.edu.cn linyongzhu@ecust.edu.cn.
Researchers developed novel photo-responsive polymersomes for targeted cancer drug delivery. These intelligent drug carriers utilize folic acid for cancer cell targeting and light for controlled drug release, enhancing treatment efficacy.
Area of Science:
- Biomaterials Science
- Polymer Chemistry
- Nanotechnology for Drug Delivery
Background:
- Traditional polymersomes face limitations in targeted drug delivery and controlled release.
- Developing stimuli-responsive drug delivery systems is crucial for enhancing therapeutic efficacy and reducing side effects.
Purpose of the Study:
- To synthesize and characterize novel lipid-like amphiphilic polymersomes that are photo-responsive.
- To achieve targeted delivery of anticancer drugs to cancer cells overexpressing folate receptors.
- To enable light-triggered drug release for precise therapeutic control.
Main Methods:
- Self-assembly of lipid-like amphiphilic polymers into polymersomes.
- Incorporation of quaternary ammonium and o-nitrobenzyl moieties for targeting and photo-responsiveness.
- Electrostatic adsorption of folic acid for active targeting.
- Loading of doxorubicin hydrochloride (DOX·HCl) as an anticancer drug.
- In vitro evaluation of drug release upon light irradiation and cellular cytotoxicity assays.
Main Results:
- Successful formation of photo-responsive polymersomes with a cationic amphiphilic structure.
- Demonstrated electrostatic adsorption of folic acid for targeting folate receptor-overexpressing cancer cells.
- Achieved controlled release of doxorubicin hydrochloride (DOX·HCl) triggered by light-induced disintegration of polymersomes.
- Enhanced cytotoxicity of DOX·HCl-loaded polymersomes against HeLa cells due to targeted delivery and photo-triggered release.
Conclusions:
- The developed cationic polymersomes represent a novel strategy for intelligent drug carriers.
- The system integrates active targeting and photo-triggered drug release for enhanced cancer therapy.
- These polymersomes show significant potential as an integrated platform for targeted drug delivery applications.
