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Related Experiment Video

Updated: Jul 5, 2026

Analysis of Side Population in Solid Tumor Cell Lines

Analysis of Side Population in Solid Tumor Cell Lines

Published on: February 23, 2021

Side population cells in human cancers.

Colleen Wu¹, Benjamin A Alman

¹Program in Developmental and Stem Cell Biology, Hospital for Sick Children, University of Toronto, Toronto Medical Discovery Tower, East Tower, 101 College Street, Toronto, Ont., Canada M5G 1L7.

|May 20, 2008

Summary

This summary is machine-generated.

Cancer stem cells (CSCs) can be identified by their ability to extrude dyes, forming a side population (SP). These SP cells share key CSC characteristics, including tumor-initiating capacity and drug resistance.

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Analysis of Side Population in Solid Tumor Cell Lines

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Harnessing the DNA Dye-triggered Side Population Phenotype to Detect and Purify Cancer Stem Cells from Biological Samples

Harnessing the DNA Dye-triggered Side Population Phenotype to Detect and Purify Cancer Stem Cells from Biological Samples

Published on: May 10, 2017

Area of Science:

Oncology
Stem Cell Biology
Biochemistry

Background:

Cancer stem cells (CSCs) are implicated in tumor growth and recurrence.
Prospectively identifying CSCs is challenging due to the lack of universal surface markers across all tumor types.
Alternative methods are needed to isolate and study CSCs in various cancers.

Purpose of the Study:

To explore dye extrusion as a method for identifying cancer stem cells (CSCs).
To characterize the side population (SP) of cells that extrude Hoechst 33342 dye.
To assess the stem-like properties of SP cells isolated from tumors.

Main Methods:

Utilized Hoechst 33342 dye exclusion assay to identify side population (SP) cells.
Analyzed SP cells for tumor-initiating capacity.
Examined gene expression profiles of SP cells for stem-like markers.
Assessed the chemosensitivity of SP cells.

Main Results:

Side population (SP) cells, defined by their ability to exclude Hoechst 33342 dye, were identified.
SP cells demonstrated enrichment for tumor-initiating capacity compared to non-SP cells.
SP cells exhibited expression of stem-like genes.
SP cells showed increased resistance to chemotherapeutic drugs.

Conclusions:

Dye extrusion, specifically Hoechst 33342 exclusion, is a viable method for identifying a unique population of cells with stem-like properties.
Side population (SP) cells possess key cancer stem cell (CSC) characteristics, including self-renewal and drug resistance.
This technique offers a valuable approach for CSC research when specific surface markers are unknown.