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Updated: May 8, 2026

Compact Quantum Dots for Single-molecule Imaging

Compact Quantum Dots for Single-molecule Imaging

Published on: October 9, 2012

Multicolor multicycle molecular profiling with quantum dots for single-cell analysis.

Pavel Zrazhevskiy¹, Lawrence D True, Xiaohu Gao

¹Department of Bioengineering, University of Washington, Seattle, Washington, USA.

Nature Protocols

|September 7, 2013

Summary

This summary is machine-generated.

This study details a protocol for molecular profiling of mammalian cells using quantum dot probes and multicolor immunofluorescence. This method allows for robust, quantitative imaging and on-demand antibody-functionalized probe preparation.

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Production and Targeting of Monovalent Quantum Dots

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Production and Targeting of Monovalent Quantum Dots

Production and Targeting of Monovalent Quantum Dots

Published on: October 23, 2014

Area of Science:

Biotechnology
Cell Biology
Microscopy

Background:

Molecular profiling of individual cells is crucial for understanding cellular heterogeneity and function.
Existing immunofluorescence techniques can be limited in multiplexing capabilities and probe preparation complexity.

Purpose of the Study:

To present a detailed protocol for molecular profiling of individual cultured mammalian cells.
To enable highly multiplexed, quantitative molecular imaging using quantum dot probes.
To establish a fast, simple, and purification-free method for preparing antibody-functionalized quantum dot probes.

Main Methods:

Utilizes multicolor multicycle immunofluorescence with quantum dot (QD) probes.
Involves cell culture, preparation and characterization of universal QD probes, cyclic cell staining, and image analysis.
Employs a self-assembly method between protein A-decorated QDs and primary antibodies for probe creation.

Main Results:

Demonstrates a protocol for robust quantitative molecular imaging with conventional fluorescence microscopy.
Enables on-demand preparation of antibody-functionalized QD libraries.
The protocol is adaptable for various cell staining applications and potentially for tissue sections.

Conclusions:

The presented protocol offers a powerful tool for biomedical researchers for detailed cellular analysis.
Quantum dot probes facilitate advanced multiplexing and quantitative imaging in cell biology.
The methodology simplifies probe preparation, making advanced imaging techniques more accessible.