Microbial heat shock protein 70 stimulatory properties have different TLR requirements.
Vaccine
; 25(6): 1096-103, 2007 Jan 22.
Article
en En
| MEDLINE
| ID: mdl-17049413
ABSTRACT
Members of the HSP70 family have acquired special significance in immunity. Among other receptors, toll like receptor (TLR)-2 and TLR-4 have been suggested to be involved in HSP70-mediated signalling. We have previously shown that recombinant HSP70 from Trypanosoma cruzi and from Plasmodium falciparum function as adjuvants. In the present study, we have extended the study with other microbial HSPs (mHSPs) and considered of interest to assess the influence of TLR-2 and TLR-4 in mHSP-promoted responses. To test this, we evaluated the adjuvant effect of various mHSP molecules in TLR-2(-/-), TLR-4(-/-) and MyD88(-/-) mice. We show that all the mHSPs tested are strong adjuvants and induced IL-12 production by bone marrow macrophages. However, even within the same family, mHSPs induced different types of immune responses. Furthermore, the mHSPs tested, possess different requirements for signaling through TLRs. Interestingly, Tc70 was found to induce in vivo and in vitro responses in both TLR-2(-/-) and TLR-4(-/-) mice. Possible implications of our findings are taken up in the discussion section.
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Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Proteínas HSP70 de Choque Térmico
/
Receptor Toll-Like 2
/
Receptor Toll-Like 4
Límite:
Animals
Idioma:
En
Revista:
Vaccine
Año:
2007
Tipo del documento:
Article
País de afiliación:
Suecia