Analysis of B-cell epitopes in the N-terminal region of Chi t I component III using monoclonal antibodies

Molecular Immunology
V van KampenX Baur

Abstract

The hemoglobins of the midge Chironomus thummi thummi (Chi t I) are known to cause immediate-type hypersensitivity reactions in humans. Further knowledge of the antigenic sites of such allergens will provide new therapeutic approaches. The aim of our study was to identify and characterize linear B-cell epitopes of the hemoglobin component III of Chi t I (136 amino acid residues). Using the antigenic index algorithm of Jameson and Wolf (Jameson and Wolf (1988) Comput. Appl. Biosci. 4, 181-186), three linear binding sequences of this allergen molecule were predicted. Two mouse monoclonal antibodies (mAbs 3 and 6) raised against purified Chi t I component III were investigated by ELISA for their binding to nine synthetic peptides 19-21 residues in length, covering nearly the whole sequence of component III. MAb 6 recognized only one peptide (11-30) while mAb 3 bound to both N-terminal peptides (1-19 and 11-30), suggesting that the antibody binding site is located in the overlapping region. This assumption could be confirmed in ELISA with solid phase-bound recombinant peptides (RP) as well as in inhibition studies with free tryptic peptides indicating that identification of these linear B-cell epitopes is neither influenced by the ...Continue Reading

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Citations

Apr 1, 1996·Clinical and Experimental Allergy : Journal of the British Society for Allergy and Clinical Immunology·Z ChenX Baur
Oct 3, 1999·The Korean Journal of Parasitology·T S YongH S Park
Jul 25, 2019·Allergy, Asthma & Immunology Research·Myung Hee YiTai Soon Yong

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