The aim of this study was to evaluate the use of RNA interference to inhibit herpes simplex virus type-1 replication in vitro. Although several animal models have been developed in an effort to reproduce different pathogenic aspects of HSV keratitis or labialis, until now, no good animal model existed in which application of a psychological laboratory stressor results in reliable reactivation of the virus. In this study stereological methods were applied for the first time to estimate cell and nucleus volume of the infected Vero cell line with herpes simplex virus type 1 (HSV-1). Remarkably, though TLR9/MyD88-deficiency abrogates IPC responses to HSV-1 in vitro, mice lacking either MyD88 or TLR9 are capable of controlling HSV-1 replication in vivo after local infection, demonstrating that TLR9- and MyD88-independent pathways in cells other than IPCs can effectively compensate for defective IPC responses to HSV-1. We now describe vhs activity in primary cultures of mouse cerebellar granule neurons (CGNs). Northern and Western blot analysis showed that trans expression of the 2.0-kb LAT intron does not affect ICP0 mRNA expression, stability, accumulation, splicing, or translation. UL42 also did not significantly reduce the lag period which was observed following the addition of UL9 to DNA, regardless of whether UL42 was added to DNA prior to or at the same time as UL9.
Although mutant d241–261 exhibited close to wild-type abilities to stimulate pol activity in vitro, it was not capable of complementing the replication of a UL42 null mutant virus. USA, 83:9094-9098, 1986). These data suggest that diverse DNA viruses appear to utilize an evolutionarily conserved recombination mechanism.