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Current Proteomics

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ISSN (Print): 1570-1646
ISSN (Online): 1875-6247

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Research Article

A Multi-Method and Structure-Based In Silico Vaccine Designing Against Helicobacter pylori Employing Immuno-Informatics Approach

Author(s): Anam Naz*, Tahreem Zaheer, Hamza Arshad Dar, Faryal Mehwish Awan, Ayesha Obaid, Shifa Tariq Ashraf, Rehan Zafar Paracha, Arif Malik and Amjad Ali*

Volume 18, Issue 2, 2021

Published on: 14 April, 2020

Page: [237 - 247] Pages: 11

DOI: 10.2174/1570164617999200414120231

Price: $65

Abstract

Background: Helicobacter pylori infection and its treatment still remain a challenge for human health worldwide. A variety of antibiotics and combination therapies are currently used to treat H. pylori induced ulcers and carcinoma; however, no effective treatment is available to eliminate the pathogen from the body. Additionally, antibiotic resistance is also one of the main reasons for prolonged and persistent infection.

Aims: Until new drugs are available for this infection, vaccinology seems the only alternative opportunity to exploit against H. pylori induced diseases.

Methods: Multiple epitopes prioritized in our previous study have been tested for their possible antigenic combinations, resulting in 169-mer and 183-mer peptide vaccines containing the amino acid sequences of 3 and 4 epitopes respectively, along with adjuvant (Cholera Toxin Subunit B adjuvant at 5’ end) and linkers (GPGPG and EAAAK).

Results: Poly-epitope proteins proposed as potential vaccine candidates against H. pylori include SabA-HP0289-Omp16-VacA (SHOV), VacA-Omp16-HP0289-FecA (VOHF), VacA-Omp16-HP0289- SabA (VOHS), VacA-Omp16-HP0289-BabA (VOHB), VacA-Omp16-HP0289-SabA-FecA (VOHSF), VacA-Omp16-HP0289-SabA-BabA (VOHSB) and VacA-Omp16-HP0289-BabA-SabA (VOHBS). Structures of these poly-epitope peptide vaccines have been modeled and checked for their affinity with HLA alleles and receptors. These proposed poly-epitope vaccine candidates bind efficiently with A2, A3, B7 and DR1 superfamilies of HLA alleles. They can also form stable and significant interactions with Toll-like receptor 2 and Toll-like receptor 4.

Conclusion: Results suggest that these multi-epitopic vaccines can elicit a significant immune response against H. pylori and can be tested further for efficient vaccine development.

Keywords: H. pylori, multi-epitope vaccine, poly-epitope peptide vaccine, HLA allele binding, TLR2 receptor, TLR4 receptor.

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