Prefusion F, Postfusion F, G Antibodies, and Disease Severity in Infants and Young Children With Acute Respiratory Syncytial Virus Infection.
J Infect Dis
; 216(11): 1398-1406, 2017 12 12.
Article
em En
| MEDLINE
| ID: mdl-29029312
ABSTRACT
Background:
Respiratory syncytial virus (RSV) is the most frequent cause of lower respiratory tract infection in infants. Maternally derived RSV-specific antibodies play a role in protection against RSV infection in early life, but data regarding the concentration and specificity of those antibodies are incomplete.Methods:
We prospectively enrolled a cohort of previously healthy infants and young children hospitalized (n = 45) or evaluated as outpatients (n = 20) for RSV infection, and healthy noninfected age-matched controls (n = 18). Serum samples were obtained at enrollment to quantify the concentrations and neutralizing activity of serum immunoglobulin G antibodies to the RSV prefusion (pre-F), postfusion (post-F), and G glycoproteins. We also assessed the associations between antibody concentrations and clinical disease severity.Results:
Concentrations of pre-F antibodies were ≥3-fold higher than post-F antibodies and >30-fold higher than G antibodies in serum from infants with acute RSV infection. Antibody concentrations and neutralizing activity inversely correlated with age. The pre-F antibodies displayed the greatest neutralizing activity (55%-100%), followed by G (0%-45%), and post-F (0%-29%) antibodies. Higher concentrations of pre-F and G antibodies, but not post-F antibodies, were associated with lower clinical disease severity scores.Conclusions:
Maternal antibodies directed to pre-F, followed by antibodies directed to G, can modulate RSV disease severity in young infants.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas Virais de Fusão
/
Vírus Sincicial Respiratório Humano
/
Infecções por Vírus Respiratório Sincicial
/
Anticorpos Antivirais
Limite:
Child
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Child, preschool
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Female
/
Humans
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Infant
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Male
País/Região como assunto:
America do norte
Idioma:
En
Ano de publicação:
2017
Tipo de documento:
Article