Optimal therapeutic activity of monoclonal antibodies against chikungunya virus requires Fc-FcγR interaction on monocytes.
Sci Immunol
; 4(32)2019 02 22.
Article
em En
| MEDLINE
| ID: mdl-30796092
ABSTRACT
Chikungunya virus (CHIKV) is an emerging mosquito-borne virus that has caused explosive outbreaks worldwide. Although neutralizing monoclonal antibodies (mAbs) against CHIKV inhibit infection in animals, the contribution of Fc effector functions to protection remains unknown. Here, we evaluated the activity of therapeutic mAbs that had or lacked the ability to engage complement and Fcγ receptors (FcγR). When administered as post-exposure therapy in mice, the Fc effector functions of mAbs promoted virus clearance from infected cells and reduced joint swelling-results that were corroborated in antibody-treated transgenic animals lacking activating FcγR. The control of CHIKV infection by antibody-FcγR engagement was associated with an accelerated influx of monocytes. A series of immune cell depletions revealed that therapeutic mAbs required monocytes for efficient clearance of CHIKV infection. Overall, our study suggests that in mice, FcγR expression on monocytes is required for optimal therapeutic activity of antibodies against CHIKV and likely other related viruses.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Artrite Experimental
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Fragmentos Fc das Imunoglobulinas
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Monócitos
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Vírus Chikungunya
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Receptores de IgG
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Anticorpos Monoclonais Murinos
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Anticorpos Monoclonais Humanizados
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Fatores Imunológicos
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Anticorpos Antivirais
Tipo de estudo:
Prognostic_studies
Limite:
Animals
Idioma:
En
Ano de publicação:
2019
Tipo de documento:
Article