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 a gapped motif and another strand having a gapped motif, a hemimer motif, a blockmer motif, a fully modified motif, a positionally modified motif or an alternating 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 some 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:
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.
摘要:
The activated oligomer compounds described herein are capable of forming bio-reversible covalent bonds with plasma proteins, in particular with human serum albumin. The plasma protein-oligomer complexes of the present invention exhibit enhanced cellular entry and significantly enhanced serum half-life.
摘要:
The present invention provides methods of promoting Drosha-mediated cleavage of antisense oligomeric compounds and compositions and compounds for carrying out the same.
摘要:
Oligomer compositions comprising first and second oligomers are provided wherein at least a portion of the first oligomer is capable of hybridizing with at least a portion of the second oligomer, at least a portion of the first oligomer is complementary to and capble of hybridizing to a selected target nucleic acid, and at least one of the first or second oligomers has a modified base for binding to an adenine or guanine base in the opposite strand. Oligonucleotide/protein compositions are also provided comprising an oligomer complementary to and capable of hybridizing to a selected target nucleic acid and at least one protein comprising at least a portion of an RNA-induced silencing complex (RISC), wherein the oligomer has a modified base for binding to an adenine or guanine base in the opposite strand.
摘要:
Oligomer compositions comprising first and second oligomers are provided wherein at least a portion of the first oligomer is capable of hybridizing with at least a portion of the second oligomer, at least a portion of the first oligomer is complementary to and capble of hybridizing to a selected target nucleic acid, and at least one of the first or second oligomers includes at least one nucleotide comprising a chimeric organic composition. Oligomer/protein compositions are also provided comprising an oligomer complementary to and capable of hybridizing to a selected target nucleic acid and at least one protein comprising at least a portion of an RNA-induced silencing complex (RISC), wherein at least one nucleotide comprising a chimeric organic composition.
摘要:
The present invention provides methods for the generation of virtual libraries of compounds. These compounds are generated in silico. The present invention encompasses methods for tracking the addition of fragments, use of reagents, and transformations performed. Further, methods for interfacing the information necessary to generate libraries of compounds with instrumentation that conducts the actual synthesis of the compounds are provided. Also provided are methods for the in silico docking of the library compounds to identified target molecules of interest.
摘要:
Methods are provided for detection and quantitation of mixtures containing target nucleobase sequences using capillary electrophoresis. Peptide nucleic acid oligomers, complementary to the target sequences and preferably having appended detectable labels, are hybridized to the targets. Capillary electrophoresis is then performed, and the detectable label is detected and quantitated.
摘要:
Compositions comprising first and second oligomers are provided wherein at least a portion of the first oligomer is capable of hybridizing with at least a portion of the second oligomer, at least a portion of the first oligomer is complementary to and capable of hybridizing to a selected target nucleic acid, and at least one of the first or second oligomers includes a modified sugar and/or backbone modification. In some embodiments the modification is a 2′ substituent group on a sugar moiety that is not H or OH. Oligomer/protein compositions are also provided comprising an oligomer complementary to and capable of hybridizing to a selected target nucleic acid and at least one protein comprising at least a portion of an RNA-induced silencing complex (RISC), wherein at least one nucleotide of the oligomer has a modified sugar and/or backbone modification.
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.