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Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

A two-component active targeting theranostic agent based on graphene quantum dots.

Xiaojuan Wang¹, Xing Sun, Hua He

¹State Key Laboratory of Heavy Oil Processing, China University of Petroleum (East China), 66 Changjiang West Road, Qingdao 266555, China. fhuang@upc.edu.cn.

Journal of Materials Chemistry. B

|April 9, 2020

Summary

This study presents a novel theranostic agent combining aptamer AS1411 and graphene quantum dots (GQDs) for targeted cancer therapy and imaging. This dual-action nanotechnology selectively labels tumor cells and inhibits their growth upon near-infrared laser irradiation.

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Area of Science:

Nanotechnology
Biomedical Engineering
Oncology

Background:

Nanotechnology enables combining diagnostics and therapeutics for cancer treatment.
Active targeting nanoassemblies typically require a targeting ligand, imaging agent, and therapeutic agent.
Developing simplified theranostic agents is crucial for efficient cancer care.

Purpose of the Study:

To develop a novel, two-component active targeting theranostic agent for cancer treatment.
To utilize aptamer AS1411 and graphene quantum dots (GQDs) in a synergistic theranostic system.
To evaluate the dual diagnostic and therapeutic capabilities of the novel agent.

Main Methods:

Fabrication of a theranostic agent using aptamer AS1411 and graphene quantum dots (GQDs).
Confocal microscopy with a 488 nm laser to assess tumor cell labeling.
Near-infrared (NIR) laser irradiation at 808 nm to evaluate therapeutic efficacy.

Main Results:

The developed agent demonstrated selective labeling of tumor cells.
The agent induced synergistic cancer cell growth inhibition when exposed to NIR laser (808 nm).
Graphene quantum dots exhibited stable fluorescence, good biocompatibility, and NIR responsiveness.

Conclusions:

The novel aptamer AS1411 and GQD-based theranostic agent effectively targets and treats cancer cells.
This two-component system simplifies active targeting nanoassemblies while retaining essential functions.
Graphene quantum dots are highly suitable for developing advanced theranostic agents due to their unique properties.