Co-administration of plasmid-encoded granulocyte-macrophage colony-stimulating factor increases human immunodeficiency virus-1 DNA vaccine-induced polyfunctional CD4+ T-cell responses
Mem. Inst. Oswaldo Cruz
;
110(8): 1010-1016, Dec. 2015. graf
Article
Dans Anglais
| LILACS
| ID: lil-769838
ABSTRACT
T-cell based vaccines against human immunodeficiency virus (HIV) generate specific responses that may limit both transmission and disease progression by controlling viral load. Broad, polyfunctional, and cytotoxic CD4+T-cell responses have been associated with control of simian immunodeficiency virus/HIV-1 replication, supporting the inclusion of CD4+ T-cell epitopes in vaccine formulations. Plasmid-encoded granulocyte-macrophage colony-stimulating factor (pGM-CSF) co-administration has been shown to induce potent CD4+ T-cell responses and to promote accelerated priming and increased migration of antigen-specific CD4+ T-cells. However, no study has shown whether co-immunisation with pGM-CSF enhances the number of vaccine-induced polyfunctional CD4+ T-cells. Our group has previously developed a DNA vaccine encoding conserved, multiple human leukocyte antigen (HLA)-DR binding HIV-1 subtype B peptides, which elicited broad, polyfunctional and long-lived CD4+ T-cell responses. Here, we show that pGM-CSF co-immunisation improved both magnitude and quality of vaccine-induced T-cell responses, particularly by increasing proliferating CD4+ T-cells that produce simultaneously interferon-γ, tumour necrosis factor-α and interleukin-2. Thus, we believe that the use of pGM-CSF may be helpful for vaccine strategies focused on the activation of anti-HIV CD4+ T-cell immunity.
Texte intégral:
Disponible
Indice:
LILAS (Amériques)
Sujet Principal:
Facteur de stimulation des colonies de granulocytes et de macrophages
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VIH-1 (Virus de l'Immunodéficience Humaine de type 1)
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Vaccins contre le SIDA
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Vaccins à ADN
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Immunité cellulaire
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Antigènes viraux
Limites du sujet:
Animaux
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Femelle
/
Humains
langue:
Anglais
Texte intégral:
Mem. Inst. Oswaldo Cruz
Thème du journal:
Médecine tropicale
/
Parasitologie
Année:
2015
Type:
Article
/
descriptif de projet
Pays d'affiliation:
Brésil
Institution/Pays d'affiliation:
Universidade de São Paulo/BR
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