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A Human Dendritic Cell-Based Method to Identify CD4+ T-Cell Epitopes in Potential Protein Allergens

Marcia Stickler, Jeanette Mucha, David Estell, Scott Power and Fiona Harding
Environmental Health Perspectives
Vol. 111, No. 2 (Feb., 2003), pp. 251-254
Stable URL: http://www.jstor.org/stable/3455654
Page Count: 4
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
A Human Dendritic Cell-Based Method to Identify  CD4+ T-Cell Epitopes in Potential Protein Allergens
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Abstract

We developed an assay to determine the location of immunodominant CD4+ T-cell epitopes in any protein. The method uses CD4+ T cells from community donors in conjunction with dendritic cells derived in vitro. Synthetic peptides constructed to describe the sequence of the protein of interest are cocultured with dendritic cells and CD4+ T cells, and T-cell proliferation is measured. Data are compiled over a large replicate of human donors to pinpoint immunodominant, usually promiscuous epitope regions. We have applied this technique to a known food allergen, the Brazil nut 2S storage globulin protein, and to two potential food allergens, the Cry1Ab and Cry3Aa proteins. We show epitope data for these three proteins. This assay can be used as a tool to guide the selection and qualification of future potential food transgenes.

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