Inhibition of adenovirus 5 replication in COS-1 cells by antisense RNAs against the viral E1a region.

Gene
O I MiroshnichenkoT I Tikchonenko

Abstract

To study the effect of antisense E1a RNA (asRNA) on adenovirus development, two types of adenovirus 5 E1a antisense constructs have been engineered. One was complementary to the viral DNA region [nucleotide (nt) positions 500-720] regulated by the metallothionein-I promoter, and the other was complementary to the DNA regions (nt positions 630-1570) under control of the long terminal repeat Moloney mouse leukosis virus promoter. Both asRNA constructs were cloned into a plasmid containing the simian virus 40 origin of replication, the gene controlling geneticin (G418) resistance (G418R), and other regulatory elements. The COS-1 cells, which contained up to 100 copies of the engineered plasmids, synthesized antiviral asRNAs, which provided 71 to over 95% inhibition of adenoviral replication, in comparison to the control cells not synthesizing asRNAs.

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