Self-assembled peptide nanofibers raising durable antibody responses against a malaria epitope.
Biomaterials
; 33(27): 6476-84, 2012 Sep.
Article
em En
| MEDLINE
| ID: mdl-22695068
ABSTRACT
Biomaterials that modulate innate and adaptive immune responses are receiving increasing interest as adjuvants for eliciting protective immunity against a variety of diseases. Previous results have indicated that self-assembling ß-sheet peptides, when fused with short peptide epitopes, can act as effective adjuvants and elicit robust and long-lived antibody responses. Here we investigated the mechanism of immunogenicity and the quality of antibody responses raised by a peptide epitope from Plasmodium falciparum circumsporozoite (CS) protein, (NANP)(3),conjugated to the self-assembling peptide domain Q11. The mechanism of adjuvant action was investigated in knockout mice with impaired MyD88, NALP3, TLR-2, or TLR-5 function, and the quality of antibodies raised against (NANP)(3)-Q11 was assessed using a transgenic sporozoite neutralizing (TSN) assay for malaria infection. (NANP)(3)-Q11 self-assembled into nanofibers, and antibody responses lasted up to 40 weeks in C57BL/6 mice. The antibody responses were T cell- and MyD88-dependent. Sera from mice primed with either irradiated sporozoites or a synthetic peptide, (T1BT*)(4)-P3C, and boosted with (NANP)(3)-Q11 showed significant increases in antibody titers and significant inhibition of sporozoite infection in TSN assays. In addition, two different epitopes could be self-assembled together without compromising the strength or duration of the antibody responses raised against either of them, making these materials promising platforms for self-adjuvanting multi-antigenic immunotherapies.
Texto completo:
1
Coleções:
01-internacional
Contexto em Saúde:
1_ASSA2030
/
2_ODS3
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3_ND
Base de dados:
MEDLINE
Assunto principal:
Peptídeos
/
Nanofibras
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Malária
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Formação de Anticorpos
/
Epitopos
Limite:
Animals
Idioma:
En
Revista:
Biomaterials
Ano de publicação:
2012
Tipo de documento:
Article