Neutrophil Vaccination Dynamics and Their Capacity To Mediate B Cell Help in Rhesus Macaques.
J Immunol
; 201(8): 2287-2302, 2018 10 15.
Article
em En
| MEDLINE
| ID: mdl-30217830
ABSTRACT
Neutrophils are the most abundant leukocyte and play a critical role in the initial response to an Ag. Recently, their ability to contribute to adaptive immunity has been highlighted. We evaluated the ability of neutrophils from blood to contribute to the adaptive immune response in a preclinical rhesus macaque SIV vaccine trial. Replication-competent adenovirus-SIV recombinants induced neutrophil activation, B cell help markers, and enhanced ability to generate reactive oxygen species. Boosting with SIV vaccines (adjuvant together with ALVAC or DNA plus envelope protein) elicited significant neutrophil responses. Serum cytokine and chemokine levels induced correlated with the frequency of neutrophil subsets expressing IL-21, myeloperoxidase, and CD64. Post-SIV infection, neutrophils exhibited dysfunction, both phenotypically and functionally. B cells from protected and infected macaques cocultured with autologous polymorphonuclear cells, consisting primarily of neutrophils, were activated, underwent class switching, and produced Abs. This B cell help was not aided by addition of IL-10 and was largely contact dependent. Numerous genes associated with inflammation, Ab production, and chemotaxis were upregulated in the cocultured B cells. We conclude that immune stimulation by vaccination or antigenic exposure imparts a greater ability of neutrophils to contribute to the adaptive immune response. Harnessing this granulocytic response has the potential to improve vaccine efficacy.
Texto completo:
1
Base de dados:
MEDLINE
Assunto principal:
Células Sanguíneas
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Linfócitos B
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Infecções por HIV
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Síndrome de Imunodeficiência Adquirida dos Símios
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HIV
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Vírus da Imunodeficiência Símia
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Vacinas contra a AIDS
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Produtos do Gene env do Vírus da Imunodeficiência Humana
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Neutrófilos
Limite:
Animals
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Humans
Idioma:
En
Revista:
J Immunol
Ano de publicação:
2018
Tipo de documento:
Article