Abstract：
:In this study, the impact of Th1-inducing cytokine gene co-delivery and antigen boosting on humoral and cellular responses induced by multiepitopic DNA immunization in mice have been investigated. Intramuscular injection of mixed DNA constructs encoding for HIV-1 Gag, Tat and Nef proteins, co-administered with the DNA encoding for interleukin-18 (IL-18) have been used. The effect of boosting with the recombinant proteins was also evaluated on the outcome of the responses in DNA-primed mice. It was demonstrated that at least two DNA immunizations were necessary to generate virus specific Th-1 responses detected by the presence of cytotoxic T lymphocyte (CTL) and by the secretion of IL-2 and IFN-gamma, but not IL-4 and IL-10, in antigen-stimulated splenocyte cultures. Interestingly, co-delivery of Th-1-inducing IL-18 gene was able to shorten by 2 weeks, the CTL induction time, and to increase the antigen-induced secretion of IL-2 and IFN-gamma. Furthermore, IL-18 co-delivery enhanced antigen-specific lymphoproliferative responses, and this was most evident in mice that were primed and boosted with plasmid DNA. However, the induction of detectable antibodies in mice required two DNA vaccinations and a protein boost. In contrast to the effects on cell-mediated immunity, co-administration of IL-18-plasmid resulted in decreased antibody titers against viral proteins.
journal_name
Vaccinejournal_title
Vaccineauthors
Billaut-Mulot O,Idziorek T,Loyens M,Capron A,Bahr GMdoi
10.1016/s0264-410x(01)00004-4subject
Has Abstractpub_date
2001-04-06 00:00:00pages
2803-11issue
20-22eissn
0264-410Xissn
1873-2518pii
S0264410X01000044journal_volume
19pub_type
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