Capped nucleic acid oligomers that inhibit cap-dependent transcription of the influenza virus endonuclease
US5837852A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Oct 14, 1993 |
| Grant date | Nov 17, 1998 |
| Priority date | — |
| Expiry date | Oct 14, 2013 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC12N2310/317
- WIPO fieldPharmaceuticals
- WIPO sectorChemistry
Abstract
Novel capped oligonucleotides useful in treatment of influenza infection. A synthetically derived 67-nucleotide RNA substrate, containing a .sup.32 P! labeled cap-1 structure was used to analyze parameters of influenza virus endonuclease activity. This substrate was specifically cleaved by the influenza virus polymerase to yield a single capped 11-nucleotide fragment capable of directly priming transcription. An analysis of systematic truncations of this RNA substrate in cleavage, elongation, and binding reactions demonstrated that the minimum chain length required for cleavage was one nucleotide past the cleavage site. In contrast, the minimum chain length required for priming activity was found to be 9 nucleotides, while a chain length of at least 4 nucleotides was required for efficient binding. Based on these chain length requirements, the present inventors show that a pool of capped oligonucleotides--too short to prime transcription but long enough to bind with high affinity to the viral polymerase--are potent inhibitors of cap-dependent in vitro transcription.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.