Cookies on this website
We use cookies to ensure that we give you the best experience on our website. If you click 'Continue' we'll assume that you are happy to receive all cookies and you won't see this message again. Click 'Find out more' for information on how to change your cookie settings.

BACKGROUND: Better understanding of the relevance of the immune response to common environmental allergens, such as the major house dust mite (HDM) allergen Der p 2, requires characterization of constituent T-cell epitopes. AIM: To identify CD4(+) T-cell epitopes within Der p 2 recognized by commonly expressed human leucocyte antigen (HLA) alleles. METHODS: HLA-blocking antibodies, peptide pools and truncations were used in ELISpot assays to establish restricted T-cell epitopes. RESULTS: People with and without atopic dermatitis have detectable Der p 2-specific T cells in the peripheral blood, which can proliferate in response to Der p 2 peptides. Interleukin-4-specific responses, both ex vivo and cultured to Der p 2 peptides, had a significant positive correlation with HDM-specific serum IgE. Within one pool of Der p 2 peptides, the 20mer D11 was found to induce multiple responses restricted through several alleles, including HLA-DPB1*0401 and HLA-DRB1*01. CONCLUSIONS: We have identified an immunogenic region of Der p 2 presented by common HLA class II alleles, including the most commonly expressed HLA allele DPB1*0401. Identification of such epitopes may be of future value in peptide immunotherapeutic approaches.

Original publication

DOI

10.1111/j.1365-2230.2011.04227.x

Type

Journal article

Journal

Clin Exp Dermatol

Publication Date

04/2012

Volume

37

Pages

266 - 276

Keywords

Adult, Alleles, Animals, Antigens, Dermatophagoides, Arthropod Proteins, CD4-Positive T-Lymphocytes, Dermatitis, Atopic, Dust, Epitopes, T-Lymphocyte, Genetic Linkage, HLA-D Antigens, Humans, Immunoglobulin E, Interferon-gamma, Interleukin-4, Pyroglyphidae