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Updated: Jul 2, 2026

Effective Detection of Hoechst Side Population Cells by Flow Cytometry

Effective Detection of Hoechst Side Population Cells by Flow Cytometry

Published on: August 23, 2024

Stem cell identification and sorting using the Hoechst 33342 side population (SP).

Margaret A Goodell¹

¹Baylor College of Medicine, Houston, Texas, USA.

Current Protocols in Cytometry

|September 5, 2008

Summary

This summary is machine-generated.

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Hoechst 33342 dye identifies murine hematopoietic stem cells (HSCs) by exploiting their unique dye efflux properties. This method distinguishes the side population (SP) of stem cells based on differential Hoechst dye uptake and extrusion.

Area of Science:

Biochemistry
Cell Biology
Hematology

Background:

Hematopoietic stem cells (HSCs) are crucial for blood cell formation.
Identifying and purifying HSCs is essential for research and therapeutic applications.
The side population (SP) phenotype has been associated with stem cell properties.

Purpose of the Study:

To describe the methodology for using Hoechst 33342 dye to identify and purify murine hematopoietic stem cells.
To elucidate the properties of Hoechst 33342 that enable the discrimination of the stem cell side population.
To highlight critical parameters for successful SP cell identification.

Main Methods:

Utilizing Hoechst 33342, a DNA-binding dye with distinct spectral properties.
Analyzing fluorescence emission at two wavelengths to resolve different cell populations.

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Last Updated: Jul 2, 2026

Effective Detection of Hoechst Side Population Cells by Flow Cytometry

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Published on: August 23, 2024

Isolation and Characterization of a Head and Neck Squamous Cell Carcinoma Subpopulation Having Stem Cell Characteristics

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Published on: May 11, 2016

Analysis of Side Population in Solid Tumor Cell Lines

Analysis of Side Population in Solid Tumor Cell Lines

Published on: February 23, 2021

Exploiting the differential efflux of Hoechst 33342 by a multi-drug-like transporter in SP cells.

Optimizing critical staining parameters: dye concentration, cell concentration, staining time, and temperature.

Main Results:

Hoechst 33342 effectively distinguishes murine HSCs as the side population (SP).
Two binding modes of Hoechst 33342 result in different spectral properties, enabling population resolution.
Differential dye efflux via a transporter protein is the basis for SP cell discrimination.
Careful control of staining conditions is vital for reproducible SP cell identification.

Conclusions:

Hoechst 33342 staining is a valuable technique for identifying and purifying hematopoietic stem cells.
The method relies on the unique dye-binding and efflux characteristics of stem cells.
Optimization of staining parameters is key to the successful application of this technique in stem cell research.