摘要:
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.
摘要:
The present invention provides oligomeric compounds having sufficient complementarity to hybridize to a nucleic acid target and methods for their use in modulating gene expression. In one embodiment the oligomeric compounds comprise double stranded constructs wherein one of the strands capable of hybridizing to a nucleic acid target, and has a plurality of modified ribofuranosyl nucleosides at defined locations. The presense of modifications at such defined positions greatly enhances the properties of the corresponding compositions.
摘要:
The present invention provides methods for rapid forensic analysis of mitochondrial DNA and methods for characterizing heteroplasmy of mitochondrial DNA, which can be used to assess the progression of mitochondrial diseases.
摘要:
The present invention provides double stranded compositions wherein the first strand comprises three different regions and the second strand is native RNA. Each region has native or modified ribofuranosyl sugar moieties that are different than those of the other two regions. At least a portion of the first oligomeric compound is complementary to and hybridizes to a nucleic acid target. The present invention also provides methods for modulating gene expression using the modified oligomeric compounds and compositions of oligomeric compounds.
摘要:
The present invention provides double stranded compositions that have a region that is complementary to a target nucleic acid. One of the targeting strand or the second strand comprises linked ribofuranosyl nucleosides and the other strand comprises linked modified nucleosides that have 3'-endo conformational geometry. The strands can be linked together or separate and may contain additional groups. The present invention also provides methods of using the compositions for modulating gene expression.
摘要:
The present invention provides compositions comprising at least one oligomeric compound comprising an alternating motif and further include a region that is complementary 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.
摘要:
The present invention provides double stranded compositions wherein one of the strands is useful in, for example, influencing the preferential loading the opposite strand into the RISC (or cleavage) complex. In particular, the present invention provides oligomeric compounds that comprise chemical modifications in at least one of the strands to drive loading of the opposite strand into the RISC (or cleavage) complex. Such modifications can be used to increase potency of duplex constructs that have been modified to enhance stability. Examples of chemical modifications that drive loading of the second strand include, but are not limited to, MOE (2'-O(CH2)2OCH3), 2'-O-methyl, -ethyl, -propyl, and -N-methylacetamide. Such modifications can be distributed throughout the strand, or placed at the 5' and/or 3' ends to make a gapmer motif on the sense strand. The activity of the 4'-thio gapmer RNA antisense strand can be improved by incorporating alternating MOE or MOE gapmer motif into the sense strand.
摘要:
Compounds, compositions and methods are provided for modulating the expression and function of small non-coding RNAs. The compositions comprise oligomeric compounds, targeted to small non-coding RNAs. Methods of using these compounds for modulation of small non-coding RNAs as well as downstream targets of these RNAs and for diagnosis and treatment of disease associated with small non-coding RNAs are also provided.
摘要:
Method for detecting and identifying unknown bioagents, including bacteria, viruses and the like, by a combination of nucleic acid amplification and molecular weight determination using primers which hybridize to conserved sequence regions of nucleic acids derived from a bioagent and which bracket variable sequence regions that uniquely identify the bioagent. The result is a 'base composition signature' (BCS) which is then matched against a database of base composition signatures, by which the bioagent is identified.