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Bioinformation. 2017 Sep 30;13(9):307-312. doi: 10.6026/97320630013307. eCollection 2017.

Analysis of predicted B and T-cell epitopes in Der p 23, allergen from Dermatophagoides pteronyssinus.

Bioinformation

Songwe Fanuel, Saeideh Tabesh, Esmaeil Sadroddiny, Gholam Ali Kardar

Affiliations

  1. Department of Medical Biotechnology, School of Advanced Technologies in Medicine, Tehran University of Medical Sciences-International Campus (IC-TUMS) Tehran, Iran.
  2. Immunology, Asthma & Allergy Research Institute (IAARI), Tehran University of Medical Sciences, Tehran, Iran.
  3. Department of Immunology, School of Public Health, Tehran University of Medical Sciences, Tehran, Iran.

PMID: 29081610 PMCID: PMC5651224 DOI: 10.6026/97320630013307

Abstract

House dust mite (HDM) allergy is the leading cause of IgE-mediated hypersensitivity. Therefore identifying potential epitopes in the Dermatophagoide pteronyssinus 23 (Der p 23), a major house dust mite allergen will aid in the development of therapeutic vaccines and diagnostic kits for HDM allergy. Experimental methods of epitope discovery have been widely exploited for the mapping of potential allergens. This study sought to use immunoinformatic methods to analyze the structure of Der p 23 for potential immunoreactive B and T-cell epitopes that could be useful for AIT and allergy diagnosis. We retrieved a Der p 23 allergen sequence from Genbank database and then analyzed it using a combination of web-based sequence analysis tools including the Immune Epitope Database (IEDB), Protparam, BCPREDS, ABCpred, BepiPred, Bcepred among others to predict the physiochemical properties and epitope spectra of the Der p 23 allergen. We then built 3D models of the predicted B-cell epitopes, T cell epitopes and Der p 23 for sequence structure homology analysis. Our results identified peptides 'TRWNEDE', 'TVHPTTTEQPDDK', and 'NDDDPTT' as immunogenic linear B-cell epitopes while 'CPSRFGYFADPKDPH' and 'CPGNTRWNEDEETCT' were found to be the most suitable T-cell epitopes that interacted well with a large number of MHC II alleles. Both epitopes had high population coverage as well as showing a 100% conservancy. These five Der p 23 epitopes are useful for AIT vaccines and HDM allergy diagnosis development.

Keywords: Allergen Immunotherapy; Der p 23; Epitopes; House Dust Mite; immunoinformatics

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