Gordon YJ, Lance S, Ricardi T, Romanowski E, Araullo-Cruz T. HSV-1 thymidine kinase negative vaccine: pathogenicity, protection, and perils.
Curr Eye Res 1987;
6:151-9. [PMID:
3030639 DOI:
10.3109/02713688709020083]
[Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Abstract
Primary inoculation of mice and rabbits with an avirulent HSV-1 thymidine kinase negative (TK-) mutant reduced keratitis, mortality, and superinfection of the trigeminal ganglion (TG) as measured by cocultivation and iontophoresis-induced ocular shedding following ocular challenge with HSV-1 McKrae and W strains. However species differences were demonstrated; with complete protection in rabbits, and incomplete protection in mice. In mice, BUDR/autoradiography and restriction enzyme analysis identified both HSV-1 McKrae and W strains as having superinfected the TG, established latency and reactivated. Also, the avirulent TK negative inoculating strain was altered to a virulent TK positive strain through possible in vivo selection, mutation &/or host-modification, and possible in vivo recombination with the virulent challenge strains. We conclude that lower species differences require that potential HSV-1 vaccines be tested in non-human primates prior to clinical trials, and that a DNA-free subunit herpes vaccine represents a safer alternative to a live virus vaccine.
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