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Morbid Sequences Suggest Molecular Mimicry between Microbial Peptides and Self-Antigens: A Possibility of Inciting Autoimmunity

DIR@IMTECH: CSIR-Institute of Microbial Technology

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Title Morbid Sequences Suggest Molecular Mimicry between Microbial Peptides and Self-Antigens: A Possibility of Inciting Autoimmunity
 
Creator Pahari, Susanta
Chatterjee, Deepyan
Negi, Shikha
Kaur, Jagdeep
Singh, Balvinder
Agrewala, J N
 
Subject QR Microbiology
 
Description Understanding etiology of autoimmune diseases has been a great challenge for designing drugs and vaccines. The pathophysiology of many autoimmune diseases may be attributed to molecular mimicry provoked by microbes. Molecular mimicry hypothesizes that a sequence homology between foreign and self-peptides leads to cross-activation of autoreactive T cells. Different microbial proteins are implicated in various autoimmune diseases, including multiple sclerosis, human type 1 diabetes, primary biliary cirrhosis and rheumatoid arthritis. It may be imperative to identify the microbial epitopes that initiate the activation of autoreactive T cells. Consequently, in the present study, we employed immunoinformatics tools to delineate homologous antigenic regions between microbes and human proteins at not only the sequence level but at the structural level too. Interestingly, many cross-reactive MHC class II binding epitopes were detected from an array of microbes. Further, these peptides possess a potential to skew immune response toward Th1-like patterns. The present study divulges many microbial target proteins, their putative MHC-binding epitopes, and predicted structures to establish the fact that both sequence and structure are two important aspects for understanding the relationship between molecular mimicry and autoimmune diseases. Such findings may enable us in designing potential immunotherapies to tolerize autoreactive T cells.
 
Publisher Frontiers Research Foundation
 
Date 2017
 
Type Article
PeerReviewed
 
Relation http://dx.doi.org/10.3389/fmicb.2017.01938
http://crdd.osdd.net/open/2023/
 
Identifier Pahari, Susanta and Chatterjee, Deepyan and Negi, Shikha and Kaur, Jagdeep and Singh, Balvinder and Agrewala, J N (2017) Morbid Sequences Suggest Molecular Mimicry between Microbial Peptides and Self-Antigens: A Possibility of Inciting Autoimmunity. Frontiers in Microbiology, 8. ISSN 1664-302X