Discrimination of the Hoechst side population in mouse bone marrow with violet and near-ultraviolet laser diodes
Version of Record online: 23 DEC 2003
Copyright © 2004 Wiley-Liss, Inc.
Cytometry Part A
Volume 57A, Issue 1, pages 45–52, January 2004
How to Cite
Telford, W. G. and Frolova, E. G. (2004), Discrimination of the Hoechst side population in mouse bone marrow with violet and near-ultraviolet laser diodes. Cytometry, 57A: 45–52. doi: 10.1002/cyto.a.10109
- Issue online: 23 DEC 2003
- Version of Record online: 23 DEC 2003
- Manuscript Accepted: 25 SEP 2003
- Manuscript Revised: 5 SEP 2003
- Manuscript Received: 23 JUN 2003
- stem cell;
- Hoechst 33342;
- side population;
- near-ultraviolet laser diode
Discrimination of stem cells with flow cytometric analysis of Hoechst 33342 efflux by the ABCG2 transporter (termed the Hoechst side population, or SP technique) is a valuable methodology for identifying bone marrow progenitors enriched with stem cells. Unfortunately, it requires a ultraviolet (UV) laser source, usually necessitating an expensive and maintenance-intensive argon- or krypton-ion gas laser on a large-scale cell sorter. In this study, we evaluated the ability of recently available violet and near-UV laser diodes to discriminate Hoechst SP on smaller cuvette-based flow cytometers.
Violet laser diodes (emitting at 408 and 401 nm) and a near-UV laser diode (emitting at 370 nm) were mounted on a BD Biosciences LSR II and evaluated for their ability to discriminate Hoechst SP in murine bone marrow.
The violet laser diodes discriminated the Hoechst SP, but with poorer resolution than with the standard UV gas laser on a large-scale cell sorter. The near-UV laser diode, in contrast, gave excellent Hoechst SP resolution.
These evaluations indicated that near-UV laser diodes give excellent Hoechst SP resolution on cuvette-based instruments. As the next generation of cell sorters integrate cuvette-based cell interrogation into conventional jet-in-air cell separation, these laser sources should become applicable for analysis and physical separation of Hoechst SP cells. Cytometry Part A 57A:45–52, 2004. © 2003 Wiley-Liss, Inc.