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. 1988 Jan;162(1):251-4.
doi: 10.1016/0042-6822(88)90417-5.

Virulence of and establishment of latency by genetically engineered deletion mutants of herpes simplex virus 1

B Meignier  1 , R Longnecker, P Mavromara-Nazos, A E Sears, B Roizman
Affiliations

Virulence of and establishment of latency by genetically engineered deletion mutants of herpes simplex virus 1

B Meignier et al. Virology. 1988 Jan.

Abstract

We report the results of studies on the biologic properties of seven deletion mutants of herpes simplex virus 1 (HSV-1). The genes deleted from six of these mutants map in the S component of HSV-1 DNA and include those specifying the alpha protein 47, the glycoproteins G and E, the viral protein kinase, and two proteins whose functions are not yet known (open reading frames US2 and US11). The seventh virus [HSV-1(F) delta 305] contained a 700-bp deletion in the thymidine kinase gene. The results of intracerebral inoculation of Balb/c mice indicated that all but one of the deletion mutants in the S component were significantly attenuated. The PFU/LD50 ratios for these mutants ranged from 10(4)- to 10(5)-fold higher than that of the wild-type, HSV-1(F). The PFU/LD50 for mutant R7032, from which the glycoprotein E gene had been deleted, was less than 100-fold higher than that of the parent virus. All of the mutants, with one exception, were able to establish latency in mice; the exception, HSV-1(F) delta 305, was able to establish latency in rabbits.

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