Cross-protective potential of a novel monoclonal antibody directed against antigenic site B of the hemagglutinin of influenza A viruses.
Identifieur interne : 000352 ( Ncbi/Curation ); précédent : 000351; suivant : 000353Cross-protective potential of a novel monoclonal antibody directed against antigenic site B of the hemagglutinin of influenza A viruses.
Auteurs : Reiko Yoshida [Japon] ; Manabu Igarashi ; Hiroichi Ozaki ; Noriko Kishida ; Daisuke Tomabechi ; Hiroshi Kida ; Kimihito Ito ; Ayato TakadaSource :
- PLoS pathogens [ 1553-7374 ] ; 2009.
Descripteurs français
- KwdFr :
- Animaux, Anticorps antiviraux (immunologie), Anticorps monoclonaux (immunologie), Données de séquences moléculaires, Femelle, Glycoprotéine hémagglutinine du virus influenza (génétique), Glycoprotéine hémagglutinine du virus influenza (immunologie), Immunisation passive, Infections à Orthomyxoviridae (), Infections à Orthomyxoviridae (immunologie), RT-PCR, Réactions croisées, Souris, Souris de lignée BALB C, Spécificité des anticorps (immunologie), Séquence d'acides aminés, Test ELISA, Virus de la grippe A (génétique), Virus de la grippe A (immunologie), Épitopes (), Épitopes (génétique), Épitopes (immunologie).
- MESH :
- génétique : Glycoprotéine hémagglutinine du virus influenza, Virus de la grippe A, Épitopes.
- immunologie : Anticorps antiviraux, Anticorps monoclonaux, Glycoprotéine hémagglutinine du virus influenza, Infections à Orthomyxoviridae, Spécificité des anticorps, Virus de la grippe A, Épitopes.
- Animaux, Données de séquences moléculaires, Femelle, Immunisation passive, Infections à Orthomyxoviridae, RT-PCR, Réactions croisées, Souris, Souris de lignée BALB C, Séquence d'acides aminés, Test ELISA, Épitopes.
English descriptors
- KwdEn :
- Amino Acid Sequence, Animals, Antibodies, Monoclonal (immunology), Antibodies, Viral (immunology), Antibody Specificity (immunology), Cross Reactions, Enzyme-Linked Immunosorbent Assay, Epitopes (chemistry), Epitopes (genetics), Epitopes (immunology), Female, Hemagglutinin Glycoproteins, Influenza Virus (genetics), Hemagglutinin Glycoproteins, Influenza Virus (immunology), Immunization, Passive, Influenza A virus (genetics), Influenza A virus (immunology), Mice, Mice, Inbred BALB C, Molecular Sequence Data, Orthomyxoviridae Infections (immunology), Orthomyxoviridae Infections (prevention & control), Reverse Transcriptase Polymerase Chain Reaction.
- MESH :
- chemical , chemistry : Epitopes.
- chemical , genetics : Epitopes, Hemagglutinin Glycoproteins, Influenza Virus.
- chemical , immunology : Antibodies, Monoclonal, Antibodies, Viral, Epitopes, Hemagglutinin Glycoproteins, Influenza Virus.
- genetics : Influenza A virus.
- immunology : Antibody Specificity, Influenza A virus, Orthomyxoviridae Infections.
- prevention & control : Orthomyxoviridae Infections.
- Amino Acid Sequence, Animals, Cross Reactions, Enzyme-Linked Immunosorbent Assay, Female, Immunization, Passive, Mice, Mice, Inbred BALB C, Molecular Sequence Data, Reverse Transcriptase Polymerase Chain Reaction.
Abstract
The hemagglutinin (HA) of influenza A viruses has been classified into sixteen distinct subtypes (H1-H16) to date. The HA subtypes of influenza A viruses are principally defined as serotypes determined by neutralization or hemagglutination inhibition tests using polyclonal antisera to the respective HA subtypes, which have little cross-reactivity to the other HA subtypes. Thus, it is generally believed that the neutralizing antibodies are not broadly cross-reactive among HA subtypes. In this study, we generated a novel monoclonal antibody (MAb) specific to HA, designated MAb S139/1, which showed heterosubtypic cross-reactive neutralization and hemagglutination inhibition of influenza A viruses. This MAb was found to have broad reactivity to many other viruses (H1, H2, H3, H5, H9, and H13 subtypes) in enzyme-linked immunosorbent assays. We further found that MAb S139/1 showed neutralization and hemagglutination-inhibition activities against particular strains of H1, H2, H3, and H13 subtypes of influenza A viruses. Mutant viruses that escaped neutralization by MAb S139/1 were selected from the A/Aichi/2/68 (H3N2), A/Adachi/2/57 (H2N2), and A/WSN/33 (H1N1) strains, and sequence analysis of the HA genes of these escape mutants revealed amino acid substitutions at positions 156, 158, and 193 (H3 numbering). A molecular modeling study showed that these amino acids were located on the globular head of the HA and formed a novel conformational epitope adjacent to the receptor-binding domain of HA. Furthermore, passive immunization of mice with MAb S139/1 provided heterosubtypic protection. These results demonstrate that MAb S139/1 binds to a common antigenic site shared among a variety of HA subtypes and neutralizes viral infectivity in vitro and in vivo by affecting viral attachment to cells. The present study supports the notion that cross-reactive antibodies play some roles in heterosubtypic immunity against influenza A virus infection, and underscores the potential therapeutic utility of cross-reactive antibodies against influenza.
DOI: 10.1371/journal.ppat.1000350
PubMed: 19300497
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pubmed:19300497Le document en format XML
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<author><name sortKey="Yoshida, Reiko" sort="Yoshida, Reiko" uniqKey="Yoshida R" first="Reiko" last="Yoshida">Reiko Yoshida</name>
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<term>Animals</term>
<term>Antibodies, Monoclonal (immunology)</term>
<term>Antibodies, Viral (immunology)</term>
<term>Antibody Specificity (immunology)</term>
<term>Cross Reactions</term>
<term>Enzyme-Linked Immunosorbent Assay</term>
<term>Epitopes (chemistry)</term>
<term>Epitopes (genetics)</term>
<term>Epitopes (immunology)</term>
<term>Female</term>
<term>Hemagglutinin Glycoproteins, Influenza Virus (genetics)</term>
<term>Hemagglutinin Glycoproteins, Influenza Virus (immunology)</term>
<term>Immunization, Passive</term>
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<term>Influenza A virus (immunology)</term>
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<term>Molecular Sequence Data</term>
<term>Orthomyxoviridae Infections (immunology)</term>
<term>Orthomyxoviridae Infections (prevention & control)</term>
<term>Reverse Transcriptase Polymerase Chain Reaction</term>
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<term>Femelle</term>
<term>Glycoprotéine hémagglutinine du virus influenza (génétique)</term>
<term>Glycoprotéine hémagglutinine du virus influenza (immunologie)</term>
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<term>Infections à Orthomyxoviridae (immunologie)</term>
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<term>Virus de la grippe A (immunologie)</term>
<term>Épitopes ()</term>
<term>Épitopes (génétique)</term>
<term>Épitopes (immunologie)</term>
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<term>Hemagglutinin Glycoproteins, Influenza Virus</term>
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<term>Anticorps monoclonaux</term>
<term>Glycoprotéine hémagglutinine du virus influenza</term>
<term>Infections à Orthomyxoviridae</term>
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<term>Orthomyxoviridae Infections</term>
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<term>Animals</term>
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<term>Enzyme-Linked Immunosorbent Assay</term>
<term>Female</term>
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<term>Données de séquences moléculaires</term>
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<front><div type="abstract" xml:lang="en">The hemagglutinin (HA) of influenza A viruses has been classified into sixteen distinct subtypes (H1-H16) to date. The HA subtypes of influenza A viruses are principally defined as serotypes determined by neutralization or hemagglutination inhibition tests using polyclonal antisera to the respective HA subtypes, which have little cross-reactivity to the other HA subtypes. Thus, it is generally believed that the neutralizing antibodies are not broadly cross-reactive among HA subtypes. In this study, we generated a novel monoclonal antibody (MAb) specific to HA, designated MAb S139/1, which showed heterosubtypic cross-reactive neutralization and hemagglutination inhibition of influenza A viruses. This MAb was found to have broad reactivity to many other viruses (H1, H2, H3, H5, H9, and H13 subtypes) in enzyme-linked immunosorbent assays. We further found that MAb S139/1 showed neutralization and hemagglutination-inhibition activities against particular strains of H1, H2, H3, and H13 subtypes of influenza A viruses. Mutant viruses that escaped neutralization by MAb S139/1 were selected from the A/Aichi/2/68 (H3N2), A/Adachi/2/57 (H2N2), and A/WSN/33 (H1N1) strains, and sequence analysis of the HA genes of these escape mutants revealed amino acid substitutions at positions 156, 158, and 193 (H3 numbering). A molecular modeling study showed that these amino acids were located on the globular head of the HA and formed a novel conformational epitope adjacent to the receptor-binding domain of HA. Furthermore, passive immunization of mice with MAb S139/1 provided heterosubtypic protection. These results demonstrate that MAb S139/1 binds to a common antigenic site shared among a variety of HA subtypes and neutralizes viral infectivity in vitro and in vivo by affecting viral attachment to cells. The present study supports the notion that cross-reactive antibodies play some roles in heterosubtypic immunity against influenza A virus infection, and underscores the potential therapeutic utility of cross-reactive antibodies against influenza.</div>
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