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- W2154681906 abstract "ABSTRACT Small interfering RNA (siRNA) could provide a new therapeutic approach to treating human immunodeficiency virus type 1 (HIV-1) infection. For long-term suppression of HIV-1, emergence of siRNA escape variants must be controlled. Here, we constructed lentiviral vectors encoding short-hairpin RNAs (shRNA) corresponding to conserved target sequences within the integrase ( int ) and the attachment site ( att ) genes, both of which are essential for HIV-1 integration. Compared to shRNA targeting of the HIV-1 transcription factor tat (shTat), shRNA against int (shIN) or the U3 region of att (shU3) showed a more potent inhibitory effect on HIV-1 replication in human CD4 + T cells. Infection with a high dose of HIV-1 resulted in the emergence of escape mutants during long-term culture. Of note, limited genetic variation was observed in the viruses resistant to shIN. A combination of shINs against wild-type and escape mutant sequences had a negative effect on their antiviral activities, indicating a potentially detrimental effect when administering multiple shRNA targeting the same region to combat HIV-1 variants. The combination of shIN and shU3 att exhibited the strongest anti-HIV-1 activity, as seen by complete abrogation of viral DNA synthesis and viral integration. In addition, a modified long-hairpin RNA spanning the 50 nucleotides in the shIN target region effectively suppressed wild-type and shIN-resistant mutant HIV-1. These results suggest that targeting of incoming viral RNA before proviral DNA formation occurs through the use of nonoverlapping multiple siRNAs is a potent approach to achieving sustained, efficient suppression of highly mutable viruses, such as HIV-1." @default.
- W2154681906 created "2016-06-24" @default.
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- W2154681906 date "2006-08-01" @default.
- W2154681906 modified "2023-09-23" @default.
- W2154681906 title "Effective Suppression of Human Immunodeficiency Virus Type 1 through a Combination of Short- or Long-Hairpin RNAs Targeting Essential Sequences for Retroviral Integration" @default.
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- W2154681906 doi "https://doi.org/10.1128/jvi.00078-06" @default.
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