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Related Experiment Video

Updated: Jul 20, 2026

Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

Protease-modulated cellular uptake of quantum dots.

Yan Zhang¹, Min Kyung So, Jianghong Rao

¹Biophysics, Cancer Biology, and Molecular Imaging Programs, Department of Radiology, Stanford University School of Medicine, 1201 Welch Road, Stanford, California 94305-5484, USA.

|September 14, 2006

Summary

Researchers developed a new method to improve quantum dot (QD) cellular uptake using specific enzymes. This enzyme-mediated process enhances nanoparticle delivery for potential applications in biological imaging and targeted drug delivery.

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Area of Science:

Nanotechnology
Biochemistry
Cell Biology

Background:

Quantum dots (QDs) are valuable nanomaterials but often struggle with cell membrane permeability.
Efficient cellular uptake is crucial for applications like biological imaging and drug delivery.

Purpose of the Study:

To develop a versatile method for enhancing quantum dot cellular uptake.
To investigate the use of matrix metalloproteinases (MMPs) for modulating nanoparticle internalization.

Main Methods:

Conjugating peptides to quantum dots.
Utilizing matrix metalloproteinase 2 (MMP-2) and MMP-7 enzymes to treat QD-peptide conjugates.
Assessing the cellular uptake of treated QD-peptide conjugates.

Main Results:

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Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

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Production and Targeting of Monovalent Quantum Dots

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Published on: October 23, 2014

High-throughput Confocal Imaging of Quantum Dot-Conjugated SARS-CoV-2 Spike Trimers to Track Binding and Endocytosis in HEK293T Cells

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Enzyme treatment significantly enhanced the cellular uptake of QD-peptide conjugates.
MMP-2 and MMP-7 effectively modulated the internalization of quantum dots into cells.
The method demonstrated efficient enzyme-modulated cellular uptake of QDs.

Conclusions:

Enzyme-modulated cellular uptake offers a simple and versatile strategy for enhancing nanoparticle internalization.
This approach holds promise for improving quantum dot applications in biological imaging.
The method may be applicable to other nanoparticles for targeted drug delivery, particularly to tumor cells.