Multisite comparison of methods for the quantitation of the surface expression of CD38 on CD8(+) T lymphocytes. The ACTG Advanced Flow Cytometry Focus Group.

Journal Article (Journal Article;Multicenter Study)

We evaluated the effect of specimen processing variations and quantitation methods on quantitative determination of CD38 expression on CD8 T lymphocytes. Neither lysing reagent (ammonium chloride versus BD FACSlyse), fixation (paraformaldehyde versus no final fixation step), nor acquisition delay (acquisition within 6 h after fixation versus 24 h after fixation) had a significant effect on CD38 relative fluorescent intensity or CD38 quantitative estimates (RFI or antibodies bound per cell). The only significant difference in fluorescent intensity and CD38 antibodies bound per cell (ABC) was encountered when whole blood was held for 24 h prior to staining and fixation and then acquired after another 24-h hold. However, for all sample processing methods above, the CD4 biologic calibrator and QuantiBRITE bead methods gave significantly different estimates of CD38 intensity. In many cases, however, these differences are relatively small and were more pronounced in certain laboratories. We conclude that there is some flexibility in sample processing methods for quantitative CD38 determination; however, it is preferable for a laboratory to employ one method of fluorescence quantitation calculation consistently because small differences are detected between different methods. Cytometry (Comm. Clin. Cytometry) 42:174-179, 2000.

Full Text

Duke Authors

Cited Authors

  • Schmitz, JL; Czerniewski, MA; Edinger, M; Plaeger, S; Gelman, R; Wilkening, CL; Zawadzki, JA; Wormsley, SB

Published Date

  • June 15, 2000

Published In

Volume / Issue

  • 42 / 3

Start / End Page

  • 174 - 179

PubMed ID

  • 10861690

International Standard Serial Number (ISSN)

  • 0196-4763


  • eng

Conference Location

  • United States