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Published in: Cancer Immunology, Immunotherapy 10/2009

Open Access 01-10-2009 | Original Article

Harmonization guidelines for HLA-peptide multimer assays derived from results of a large scale international proficiency panel of the Cancer Vaccine Consortium

Authors: Cedrik Michael Britten, Sylvia Janetzki, Leah Ben-Porat, Timothy M. Clay, Michael Kalos, Holden Maecker, Kunle Odunsi, Michael Pride, Lloyd Old, Axel Hoos, Pedro Romero, for the HLA-peptide Multimer Proficiency Panel of the CVC-CRI Immune Assay Working Group

Published in: Cancer Immunology, Immunotherapy | Issue 10/2009

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Abstract

Purpose

The Cancer Vaccine Consortium of the Cancer Research Institute (CVC-CRI) conducted a multicenter HLA-peptide multimer proficiency panel (MPP) with a group of 27 laboratories to assess the performance of the assay.

Experimental design

Participants used commercially available HLA-peptide multimers and a well characterized common source of peripheral blood mononuclear cells (PBMC). The frequency of CD8+ T cells specific for two HLA-A2-restricted model antigens was measured by flow cytometry.
The panel design allowed for participants to use their preferred staining reagents and locally established protocols for both cell labeling, data acquisition and analysis.

Results

We observed significant differences in both the performance characteristics of the assay and the reported frequencies of specific T cells across laboratories. These results emphasize the need to identify the critical variables important for the observed variability to allow for harmonization of the technique across institutions.

Conclusions

Three key recommendations emerged that would likely reduce assay variability and thus move toward harmonizing of this assay. (1) Use of more than two colors for the staining (2) collect at least 100,000 CD8 T cells, and (3) use of a background control sample to appropriately set the analytical gates. We also provide more insight into the limitations of the assay and identified additional protocol steps that potentially impact the quality of data generated and therefore should serve as primary targets for systematic analysis in future panels. Finally, we propose initial guidelines for harmonizing assay performance which include the introduction of standard operating protocols to allow for adequate training of technical staff and auditing of test analysis procedures.
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Metadata
Title
Harmonization guidelines for HLA-peptide multimer assays derived from results of a large scale international proficiency panel of the Cancer Vaccine Consortium
Authors
Cedrik Michael Britten
Sylvia Janetzki
Leah Ben-Porat
Timothy M. Clay
Michael Kalos
Holden Maecker
Kunle Odunsi
Michael Pride
Lloyd Old
Axel Hoos
Pedro Romero
for the HLA-peptide Multimer Proficiency Panel of the CVC-CRI Immune Assay Working Group
Publication date
01-10-2009
Publisher
Springer-Verlag
Published in
Cancer Immunology, Immunotherapy / Issue 10/2009
Print ISSN: 0340-7004
Electronic ISSN: 1432-0851
DOI
https://doi.org/10.1007/s00262-009-0681-z

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