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Human immunodeficiency virus type 1 (HIV-1) integrase (IN) functions in cells within the context of high molecular weight preintegration complexes (PICs). Lens epithelium-derived growth factor (LEDGF) transcriptional coactivator/p75 and hepatoma-derived growth factor related protein 2 (HRP2) tightly bind to HIV-1 IN and stimulate its integration activity in vitro. Here, we show that each recombinant...
The Epstein Barr virus (EBV) plays a role in maintenance of the tumor phenotype in a number of human cancers. The EBV latency replication factor, EBNA1, is required for persistence of the EBV episome, is anti-apoptotic, and is universally expressed in all EBV-associated tumors. Here, we show that EBNA1-specific siRNAs can inhibit EBNA1 expression and function. siRNAs were generated against three target...
The Vaccinia virus gene, E3L, encodes a double-stranded RNA [dsRNA]-binding protein. We hypothesized that, owing to the critical nature of dsRNA in triggering host innate antiviral responses, E3L-specific small-interfering RNAs [siRNAs] should be effective antiviral agents against pox viruses, for which Vaccinia virus is an appropriate surrogate. In this study, we have utilized two human cell types,...
Short hairpin RNA (shRNA) can be stably expressed in cells to down-modulate gene expression. While retroviral and lentiviral vectors can be used to deliver shRNAs, the restricted viral titer is the major limitation for efficient gene transfer, which is especially important for cancer gene therapy. We were interested in using replicating murine leukemia virus (MLV) to enhance the shRNA transfer. Although...
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