Related Experiment Video
Updated: May 8, 2026
10:16
Production and Targeting of Monovalent Quantum Dots
Published on: October 23, 2014
Target delivery and cell imaging using hyaluronic acid-functionalized graphene quantum dots
Abdullah-Al-Nahain1, Jung-Eun Lee, Insik In
1Department of Green Bio Engineering, Korea National University of Transportation , Chungju 380-702, Republic of Korea.
Molecular Pharmaceutics
|September 7, 2013
Summary
Hyaluronic acid (HA) functionalized graphene quantum dots (GQDs) enable targeted cancer therapy by accumulating in tumors. This biocompatible GQD-HA system shows potential as a novel drug carrier for enhanced treatment.
Area of Science:
- Biomaterials Science
- Nanotechnology
- Chemical Engineering
Background:
- Graphene quantum dots (GQDs) offer unique optical and electronic properties for biomedical applications.
- Targeted drug delivery systems are crucial for improving therapeutic efficacy and reducing side effects.
- Hyaluronic acid (HA) is a biocompatible polymer that can target CD44 receptors overexpressed on cancer cells.
Purpose of the Study:
- To develop an efficient and target-specific delivery system using graphene quantum dots (GQDs) functionalized with hyaluronic acid (HA).
- To evaluate the potential of GQD-HA as a drug carrier and a biocompatible material for cancer therapy.
Main Methods:
- Graphene quantum dots (GQDs) were synthesized and conjugated with hyaluronic acid (HA) via dopamine hydrochloride.
- Particle size and fluorescence intensity were characterized using transmission electron microscopy and fluorescence spectroscopy.
- In vivo biodistribution studies were performed on tumor-bearing mice, and in vitro cellular imaging was conducted on CD44-overexpressing cells.
- Drug loading and release kinetics of doxorubicin were investigated, and cytotoxicity was assessed using MTT assays.
Main Results:
- GQD-HA nanoparticles of approximately 20 nm were successfully prepared, retaining significant fluorescence.
- In vivo studies showed enhanced fluorescence accumulation in tumor tissues of mice.
- In vitro imaging demonstrated strong fluorescence uptake in CD44-overexpressing A549 cancer cells.
- GQD demonstrated efficient doxorubicin loading and release under acidic conditions, with GQD-HA exhibiting good biocompatibility.
Conclusions:
- Hyaluronic acid (HA) effectively targets graphene quantum dots (GQDs) to CD44-overexpressing tumors, enabling specific delivery.
- GQD-HA serves as a promising biocompatible drug carrier with potential for targeted cancer therapy.
- The developed GQD-HA system demonstrates significant potential for both in vitro and in vivo biomedical applications.
