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. 1996 Feb;87(2):283–290. doi: 10.1046/j.1365-2567.1996.467533.x

Multiple B- and T-cell epitopes on a major allergen of Kentucky Bluegrass pollen.

L Zhang 1, M Yang 1, P Chong 1, S S Mohapatra 1
PMCID: PMC1384286  PMID: 8698392

Abstract

The B- and T-cell epitopes of a recombinant grass allergen, rKBG60, were delineated using a set of overlapping synthetic peptides. Direct binding by enzyme-linked immunosorbent assay (ELISA) utilizing serum pools led to the identification of 13 murine immunoglobulin-, and nine to 13 human IgG- and five to seven human IgE-reactive overlapping peptides. Of the peptides which bound to human IgE antibodies, all but three peptides bound to human and/or murine IgG antibodies. Furthermore, eight out of 12 synthetic peptides induced antigen-specific antibodies in mice, suggesting that these peptides contained epitopes that recognized and/or induced T cells. These results, in conjunction with cross-recognition of different peptides at the C-terminus of rKBG60 by antibodies to neighbouring or non-overlapping peptides suggest that the C-terminus of this antigen represents a dominant antigenic and allergenic site. Peripheral blood mononuclear cell (PBMC) proliferation studies using these synthetic peptides for 13 grass allergic individuals indicated that seven potential human T-cell epitopes exist on this allergen. Taken together, the results demonstrate that multiple B- and T-cell epitopes exist on this major group of grass allergens, the majority of which are localized at the C-terminus of this antigen.

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Selected References

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