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Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis

The misuse of antibiotics in our daily lives has led to the emergence of antimicrobial resistance. As a result, many antibiotics are becoming ineffective. This phenomenon is linked with high rates of mortality and morbidity. Therefore, new approaches are required to address this major health issue....

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Autores principales: Alshammari, Abdulrahman, Alasmari, Abdullah F., Alharbi, Metab, Ali, Nemat, Muhseen, Ziyad Tariq, Ashfaq, Usman Ali, Ud-din, Miraj, Ullah, Asad, Arshad, Muhammad, Ahmad, Sajjad
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9518150/
https://www.ncbi.nlm.nih.gov/pubmed/36078462
http://dx.doi.org/10.3390/ijerph191710742
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author Alshammari, Abdulrahman
Alasmari, Abdullah F.
Alharbi, Metab
Ali, Nemat
Muhseen, Ziyad Tariq
Ashfaq, Usman Ali
Ud-din, Miraj
Ullah, Asad
Arshad, Muhammad
Ahmad, Sajjad
author_facet Alshammari, Abdulrahman
Alasmari, Abdullah F.
Alharbi, Metab
Ali, Nemat
Muhseen, Ziyad Tariq
Ashfaq, Usman Ali
Ud-din, Miraj
Ullah, Asad
Arshad, Muhammad
Ahmad, Sajjad
author_sort Alshammari, Abdulrahman
collection PubMed
description The misuse of antibiotics in our daily lives has led to the emergence of antimicrobial resistance. As a result, many antibiotics are becoming ineffective. This phenomenon is linked with high rates of mortality and morbidity. Therefore, new approaches are required to address this major health issue. Leptotrichia buccalis is a Gram-negative, rod-shaped bacterium which normally resides in the oral and vaginal cavities. It is an emerging bacterial pathogen which is developing new antibiotic-resistance mechanisms. No approved vaccine is available against this pathogen, which is a cause for growing concern. In this study, an in silico-based, multi-epitopes vaccine against this pathogen was designed by applying reverse vaccinology and immunoinformatic approaches. Of a total of 2193 predicted proteins, 294 were found to be redundant while 1899 were non-redundant. Among the non-redundant proteins, 6 were predicted to be present in the extracellular region, 12 in the periplasmic region and 23 in the outer-membrane region. Three proteins (trypsin-like peptidase domain-containing protein, sel1 repeat family protein and TrbI/VirB10 family protein) were predicted to be virulent and potential subunit vaccine targets. In the epitopes prediction phase, the three proteins were subjected to B- and T-cell epitope mapping; 19 epitopes were used for vaccine design. The vaccine construct was docked with MHC-I, MHC-II and TLR-4 immune receptors and only the top-ranked complex (based on global energy value) was selected in each case. The selected docked complexes were examined in a molecular dynamic simulation and binding free energies analysis in order to assess their intermolecular stability. It was observed that the vaccine binding mode with receptors was stable and that the system presented stable dynamics. The net binding free energy of complexes was in the range of −300 to −500 kcal/mol, indicating the formation of stable complexes. In conclusion, the data reported herein might help vaccinologists to formulate a chimeric vaccine against the aforementioned target pathogen.
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spelling pubmed-95181502022-09-29 Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis Alshammari, Abdulrahman Alasmari, Abdullah F. Alharbi, Metab Ali, Nemat Muhseen, Ziyad Tariq Ashfaq, Usman Ali Ud-din, Miraj Ullah, Asad Arshad, Muhammad Ahmad, Sajjad Int J Environ Res Public Health Article The misuse of antibiotics in our daily lives has led to the emergence of antimicrobial resistance. As a result, many antibiotics are becoming ineffective. This phenomenon is linked with high rates of mortality and morbidity. Therefore, new approaches are required to address this major health issue. Leptotrichia buccalis is a Gram-negative, rod-shaped bacterium which normally resides in the oral and vaginal cavities. It is an emerging bacterial pathogen which is developing new antibiotic-resistance mechanisms. No approved vaccine is available against this pathogen, which is a cause for growing concern. In this study, an in silico-based, multi-epitopes vaccine against this pathogen was designed by applying reverse vaccinology and immunoinformatic approaches. Of a total of 2193 predicted proteins, 294 were found to be redundant while 1899 were non-redundant. Among the non-redundant proteins, 6 were predicted to be present in the extracellular region, 12 in the periplasmic region and 23 in the outer-membrane region. Three proteins (trypsin-like peptidase domain-containing protein, sel1 repeat family protein and TrbI/VirB10 family protein) were predicted to be virulent and potential subunit vaccine targets. In the epitopes prediction phase, the three proteins were subjected to B- and T-cell epitope mapping; 19 epitopes were used for vaccine design. The vaccine construct was docked with MHC-I, MHC-II and TLR-4 immune receptors and only the top-ranked complex (based on global energy value) was selected in each case. The selected docked complexes were examined in a molecular dynamic simulation and binding free energies analysis in order to assess their intermolecular stability. It was observed that the vaccine binding mode with receptors was stable and that the system presented stable dynamics. The net binding free energy of complexes was in the range of −300 to −500 kcal/mol, indicating the formation of stable complexes. In conclusion, the data reported herein might help vaccinologists to formulate a chimeric vaccine against the aforementioned target pathogen. MDPI 2022-08-29 /pmc/articles/PMC9518150/ /pubmed/36078462 http://dx.doi.org/10.3390/ijerph191710742 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Alshammari, Abdulrahman
Alasmari, Abdullah F.
Alharbi, Metab
Ali, Nemat
Muhseen, Ziyad Tariq
Ashfaq, Usman Ali
Ud-din, Miraj
Ullah, Asad
Arshad, Muhammad
Ahmad, Sajjad
Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title_full Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title_fullStr Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title_full_unstemmed Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title_short Novel Chimeric Vaccine Candidate Development against Leptotrichia buccalis
title_sort novel chimeric vaccine candidate development against leptotrichia buccalis
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9518150/
https://www.ncbi.nlm.nih.gov/pubmed/36078462
http://dx.doi.org/10.3390/ijerph191710742
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