Abstract:
:A central tenet of vaccine development is to identify immune correlates of protection. Both plasmid-encoded gD as well as recombinant protein gD can protect mice from lethal herpes simplex virus (HSV) challenge. It is known that different vaccine modalities should induce different immune phenotypes. Yet, paradoxically, it is also thought that the basis for protection should rely on exploitation of vulnerabilities of the pathogen and therefore that the overlapping properties of these different vaccines would reveal insight into common immune mechanisms responsible for protection. We sought to investigate this question by comparing two different vaccine modalities in the HSV-2 mouse model. We observed that gD protein was a strong inducer of T(h)2-type immune responses, and overall antibody titers of IgG, IgE and IgA were significantly higher than those induced by plasmid gD vaccines. In contrast, the plasmid gD vaccine induced a strong T(h)1 bias. Following high-dose challenge the gD protein was most effective at providing protection. However, at lower lethal dose challenge, while both vaccines were protective with regards to survival, only the plasmid-vaccinated animals were protected from HSV-2 infection-induced morbidity. These studies suggest that these different vaccine modalities induce protection through unique non-overlapping mechanisms, supporting that vaccine correlates are associated with the types of immunogen rather than solely the pathogen.
journal_name
Int Immunoljournal_title
International immunologyauthors
Sin JI,Ayyavoo V,Boyer J,Kim J,Ciccarelli RB,Weiner DBdoi
10.1093/intimm/11.11.1763subject
Has Abstractpub_date
1999-11-01 00:00:00pages
1763-73issue
11eissn
0953-8178issn
1460-2377journal_volume
11pub_type
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