Inhibition of PCSK9 through RNAi
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United States of America Patent
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Nov 15, 2016
Grant Date -
Aug 1, 2013
app pub date -
Jan 5, 2010
filing date -
Jan 5, 2009
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Abstract
The invention relates to various PCSK9 RNAi constructs with gene silencing activities, and uses thereof. The construct has a double-stranded region of 19-49 nucleotides, preferably 25, 26, or 27 nucleotides, and preferably blunt-ended. The construct has selective minimal modifications to confer an optimal balance of biological activity, toxicity, stability, and target gene specificity. The sense strand may be modified such that the construct is not cleaved by Dicer or other RNAse III, and the entire length of the antisense strand is loaded into RISC. In addition, the antisense strand may also be modified by 2′-O-methyl groups at the 2nd 5′-end nucleotide to greatly reduce off-target silencing. The constructs of the invention largely avoid the interferon response and sequence-independent apoptosis in mammalian cells, exhibits better serum stability, and enhanced target specificity.
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