Repeated administration of hepatitis C virus core-encoding plasmid to mice does not necessarily increase the immune response generated against this antigen.
Biotechnol Appl Biochem
; 33(1): 47-51, 2001 02.
Article
en En
| MEDLINE
| ID: mdl-11171035
ABSTRACT
DNA immunization is a promising approach in generating immune responses to infectious pathogens in many different animal models. In an effort to augment the anti-[hepatitis C virus (HCV) core] immune response, generated after DNA immunization, the importance of vaccination regimen regarding dose and boosting was investigated in the present study. Balb/c mice were intramuscularly injected with an expression plasmid encoding a truncated variant comprising amino acids 1-176 of the HCV core protein. The highest anti-core antibody titres (13700) were detected in mice inoculated with 50-100 microg of core-encoding plasmid. Additionally, we demonstrated that antibody levels induced by a single injection of DNA could be further increased by boosting with a second injection of DNA three weeks after primary immunization. However, administration of additional doses or lengthening of the resting period between inoculations resulted in similar or even weaker anti-core antibody responses. A similar anti-(HCV core) lymphoproliferative response was also detected in animals that had the highest level of anti-core antibodies. These results indicate that, in clinical trials, vaccination regimen might be a critical factor in generating optimal anti-(HCV core) immune responses after genetic immunization.
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Colección:
01-internacional
Asunto principal:
Plásmidos
/
Hepacivirus
/
Antígenos de la Hepatitis C
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Biotechnol Appl Biochem
Asunto de la revista:
BIOQUIMICA
/
BIOTECNOLOGIA
Año:
2001
Tipo del documento:
Article
País de afiliación:
Cuba