DOUBLE STRAND COMPOSITIONS COMPRISING DIFFERENTIALLY MODIFIED STRANDS FOR USE IN GENE MODULATION
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United States of America Patent
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Jan 21, 2016
app pub date -
Jul 21, 2015
filing date -
Jun 3, 2004
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Abstract
The present invention provides double stranded compositions wherein each strand is modified to have a motif defined by positioning of β-D-ribonucleosides and sugar modified nucleosides. More particularly, the present compositions comprise one strand having an alternating motif and another strand having a hemimer motif, a blockmer motif, a fully modified motif or a positionally modified motif. At least one of the strands has complementarity to a nucleic acid target. The compositions are useful for targeting selected nucleic acid molecules and modulating the expression of one or more genes. In preferred embodiments the compositions of the present invention hybridize to a portion of a target RNA resulting in loss of normal function of the target RNA. The present invention also provides methods for modulating gene expression.
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