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Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein
The SARS-CoV-2 omicron variants keep accumulating a large number of mutations in the spike (S) protein, which contributes to greater transmissibility and a rapid rise to dominance within populations. The identification of mutations and their affinity to the cellular angiotensin-converting enzyme-2 (...
Autores principales: | , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2023
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10577267/ https://www.ncbi.nlm.nih.gov/pubmed/37849762 http://dx.doi.org/10.3389/fimmu.2023.1209513 |
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author | Shikha, Sristy Jogi, Mukesh Kumar Jha, Ruchika Kumar, Rana Amit Sah, Tathagat Singh, Pushpendra Sagar, Ritu Kumar, Anuj Marwal, Robin Ponnusamy, Kalaiarasan Agarwal, Subhash Mohan Kumar, R. Suresh Arif, Nazneen Bharadwaj, Mausumi Singh, Shalini Kumar, Pramod |
author_facet | Shikha, Sristy Jogi, Mukesh Kumar Jha, Ruchika Kumar, Rana Amit Sah, Tathagat Singh, Pushpendra Sagar, Ritu Kumar, Anuj Marwal, Robin Ponnusamy, Kalaiarasan Agarwal, Subhash Mohan Kumar, R. Suresh Arif, Nazneen Bharadwaj, Mausumi Singh, Shalini Kumar, Pramod |
author_sort | Shikha, Sristy |
collection | PubMed |
description | The SARS-CoV-2 omicron variants keep accumulating a large number of mutations in the spike (S) protein, which contributes to greater transmissibility and a rapid rise to dominance within populations. The identification of mutations and their affinity to the cellular angiotensin-converting enzyme-2 (ACE-2) receptor and immune evasion in the Delhi NCR region was under-acknowledged. The study identifies some mutations (Y505 reversion, G339H, and R346T/N) in genomes from Delhi, India, and their probable implications for altering the immune response and binding affinity for ACE-2. The spike mutations have influenced the neutralizing activity of antibodies against the omicron variant, which shows partial immune escape. However, researchers are currently exploring various mitigation strategies to tackle the potential decline in efficacy or effectiveness against existing and future variants of SARS-CoV-2. These strategies include modifying vaccines to target specific variants, such as the omicron variant, developing multivalent vaccine formulations, and exploring alternative delivery methods. To address this, it is also necessary to understand the impact of these mutations from a different perspective, especially in terms of alterations in antigenic determinants. In this study, we have done whole genome sequencing (WGS) of SARS-CoV-2 in COVID-19 samples from Delhi, NCR, and analyzed the spike’s mutation with an emphasis on antigenic alterations. The impact of mutation in terms of epitope formation, loss/gain of efficiency, and interaction of epitopes with antibodies has been studied. Some of the mutations or variant genomes seem to be the progenitors of the upcoming variants in India. Our analyses suggested that weakening interactions with antibodies may lead to immune resistance in the circulating genomes. |
format | Online Article Text |
id | pubmed-10577267 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2023 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-105772672023-10-17 Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein Shikha, Sristy Jogi, Mukesh Kumar Jha, Ruchika Kumar, Rana Amit Sah, Tathagat Singh, Pushpendra Sagar, Ritu Kumar, Anuj Marwal, Robin Ponnusamy, Kalaiarasan Agarwal, Subhash Mohan Kumar, R. Suresh Arif, Nazneen Bharadwaj, Mausumi Singh, Shalini Kumar, Pramod Front Immunol Immunology The SARS-CoV-2 omicron variants keep accumulating a large number of mutations in the spike (S) protein, which contributes to greater transmissibility and a rapid rise to dominance within populations. The identification of mutations and their affinity to the cellular angiotensin-converting enzyme-2 (ACE-2) receptor and immune evasion in the Delhi NCR region was under-acknowledged. The study identifies some mutations (Y505 reversion, G339H, and R346T/N) in genomes from Delhi, India, and their probable implications for altering the immune response and binding affinity for ACE-2. The spike mutations have influenced the neutralizing activity of antibodies against the omicron variant, which shows partial immune escape. However, researchers are currently exploring various mitigation strategies to tackle the potential decline in efficacy or effectiveness against existing and future variants of SARS-CoV-2. These strategies include modifying vaccines to target specific variants, such as the omicron variant, developing multivalent vaccine formulations, and exploring alternative delivery methods. To address this, it is also necessary to understand the impact of these mutations from a different perspective, especially in terms of alterations in antigenic determinants. In this study, we have done whole genome sequencing (WGS) of SARS-CoV-2 in COVID-19 samples from Delhi, NCR, and analyzed the spike’s mutation with an emphasis on antigenic alterations. The impact of mutation in terms of epitope formation, loss/gain of efficiency, and interaction of epitopes with antibodies has been studied. Some of the mutations or variant genomes seem to be the progenitors of the upcoming variants in India. Our analyses suggested that weakening interactions with antibodies may lead to immune resistance in the circulating genomes. Frontiers Media S.A. 2023-10-02 /pmc/articles/PMC10577267/ /pubmed/37849762 http://dx.doi.org/10.3389/fimmu.2023.1209513 Text en Copyright © 2023 Shikha, Jogi, Jha, Kumar, Sah, Singh, Sagar, Kumar, Marwal, Ponnusamy, Agarwal, Kumar, Arif, Bharadwaj, Singh and Kumar https://creativecommons.org/licenses/by/4.0/This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Immunology Shikha, Sristy Jogi, Mukesh Kumar Jha, Ruchika Kumar, Rana Amit Sah, Tathagat Singh, Pushpendra Sagar, Ritu Kumar, Anuj Marwal, Robin Ponnusamy, Kalaiarasan Agarwal, Subhash Mohan Kumar, R. Suresh Arif, Nazneen Bharadwaj, Mausumi Singh, Shalini Kumar, Pramod Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title | Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title_full | Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title_fullStr | Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title_full_unstemmed | Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title_short | Genome sequencing of SARS-CoV-2 omicron variants in Delhi reveals alterations in immunogenic regions in spike glycoprotein |
title_sort | genome sequencing of sars-cov-2 omicron variants in delhi reveals alterations in immunogenic regions in spike glycoprotein |
topic | Immunology |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10577267/ https://www.ncbi.nlm.nih.gov/pubmed/37849762 http://dx.doi.org/10.3389/fimmu.2023.1209513 |
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