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Integrated cell membrane encapsulated PQDs-TK quantum dot nanoclusters with ROS-responsive triggering for efficient
Tiange Wang1, Yanlin Sun1, Dong Zeng1
1School of Life Science and Technology, Wuhan Polytechnic University, Wuhan 430023, China.
Journal of Colloid and Interface Science
|December 31, 2024
Summary
This study introduces cell membrane-encapsulated quantum dots (QDs) for efficient gene delivery. These ROS-responsive nanoclusters show enhanced biocompatibility and tumor targeting for improved DNA delivery in biomedical applications.
Area of Science:
- Biomedical Engineering
- Nanotechnology
- Materials Science
Background:
- Quantum dots (QDs) offer unique photo-physical properties and biocompatibility for biomedical uses like imaging and therapeutics.
- Limitations in QD stability and tumor specificity hinder their clinical translation.
- Developing targeted and responsive gene delivery systems is crucial for advancing nanomedicine.
Purpose of the Study:
- To develop a novel ROS-responsive, cell membrane-encapsulated quantum dot nanocluster (CM-PQDs-TK) for efficient and visualized DNA delivery.
- To enhance the biocompatibility, stability, and tumor-targeting capabilities of quantum dot-based gene carriers.
- To investigate the performance of CM-PQDs-TK in terms of DNA loading, release, cellular uptake, and transfection efficiency.
Main Methods:
- Fabrication of CM-PQDs-TK nanoclusters using quantum dots and cell membrane encapsulation.
- Characterization of nanocluster size, morphology, and ROS responsiveness.
- In vitro evaluation of DNA loading capacity, cellular uptake, and transfection efficiency in 293T and Hela cells using flow cytometry and fluorescence microscopy.
Main Results:
- CM-PQDs-TK demonstrated excellent DNA loading capacity and protective ability.
- The nanoclusters exhibited superior ROS responsiveness, with particle size and morphology changes indicating effective triggering.
- CM-PQDs-TK showed significantly higher cellular uptake and DNA transfection efficiency compared to unmodified QDs, reaching 67.14% in 293T cells and 43.98% in Hela cells.
- Effective intracellular DNA release was observed in tumor cells due to ROS-responsive triggering.
Conclusions:
- Cell membrane encapsulation and ROS-responsive triggering significantly enhance the performance of quantum dot-based gene delivery systems.
- CM-PQDs-TK offers a promising platform for targeted and efficient gene therapy with improved biocompatibility and tumor specificity.
- This work provides a foundation for designing advanced, intelligent quantum dot gene carriers for biomedical applications.
