Cellular CD4 T cell responses to the diphtheria-derived carrier protein of conjugated pneumococcal vaccine and antibody response to pneumococcal vaccination in HIV-infected adults.
Clin Infect Dis
; 50(8): 1174-83, 2010 Apr 15.
Article
em En
| MEDLINE
| ID: mdl-20210645
ABSTRACT
BACKGROUND:
The French National Agency for AIDS and Viral Hepatitis Research (ANRS) 114 Pneumovac trial showed that a strategy combining a 7-valent pneumococcal conjugate vaccine (PCV) prime at week 0 followed by a 23-valent pneumococcal polysaccharide vaccine (PPV) boost at week 4 enhances the frequency and magnitude of immunoglobulin (Ig) G responses against Streptococcus pneumoniae polysaccharides (SPPs) compared with PPV alone. CD4 T cell responses specific to the diphtheria-derived carrier protein CRM(197) were evaluated.METHODS:
Lymphocyte proliferative responses (LPRs) and T(H)1 cytokine T cell responses against the diphtheria-derived carrier protein CRM(197) contained in the PCV were investigated at weeks 0, 4, and 24.RESULTS:
In the prime-boost PCV and PPV group, the magnitude of LPRs to diphtheria toxoid and CRM(197) increased at week 4 (P < .001) and persisted until week 24 (P = .08 and .13, respectively, compared with week 4). Interferon-gamma and interleukin-2 production to CRM(197) increased significantly at week 4 (P = .02 and P < .001, respectively) and remained stable until week 24 (P = .28 and P = .08, respectively). No changes were detected in the PPV group. A strong association among the magnitude of LPRs to CRM(197) at week 4, the breadth of SPP specific IgG responses at week 8 (P = .03), and sustained IgG responses at week 24 was observed. A high frequency of helper follicular CD4(+)CXCR5(+) T cells at baseline was associated with a better LPR response to CRM(197.)CONCLUSIONS:
The PCV prime-elicited memory T cell responses were associated with better and sustained humoral SPP specific IgG responses. ClinicalTrials.gov identifier. NCT00148824.
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Proteínas de Bactérias
/
Linfócitos T CD4-Positivos
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Proteínas de Transporte
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Infecções por HIV
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Vacinas Pneumocócicas
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Anticorpos Antibacterianos
Limite:
Adult
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Female
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Humans
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Male
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Middle aged
Idioma:
En
Revista:
Clin Infect Dis
Assunto da revista:
DOENCAS TRANSMISSIVEIS
Ano de publicação:
2010
Tipo de documento:
Article
País de afiliação:
França