Incorporation of Biaryl Units into the 5' and 3' Ends of Sense and Antisense Strands of siRNA Duplexes Improves Strand Selectivity and Nuclease Resistance.
Summary of "Incorporation of Biaryl Units into the 5' and 3' Ends of Sense and Antisense Strands of siRNA Duplexes Improves Strand Selectivity and Nuclease Resistance."
Small interfering RNA (siRNA) is a noncoding RNA with considerable potential as a new therapeutic drug for intractable diseases. siRNAs can be rationally designed and synthesized if the sequences of the disease-causing genes are known. In this paper, we describe the synthesis and properties of siRNAs modified with biaryl units. We found that incorporation of biaryl units into the 5' and 3' ends of sense and antisense strands of siRNA duplexes improved strand selectivity and nuclease resistance.
Department of Biomolecular Science, Faculty of Engineering, and United Graduate School of Drug Discovery and Medical Information Sciences, Gifu University, 1-1 Yanagido, Gifu 501-1193, Japan, Department of Microbiology and Cell Biology, The Tokyo Metropol
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Name: Bioconjugate chemistry
Medical and Biotech [MESH] Definitions
DNA that is complementary to the sense strand. (The sense strand has the same sequence as the mRNA transcript. The antisense strand is the template for mRNA synthesis.) Synthetic antisense DNAs are used to hybridize to complementary sequences in target RNAs or DNAs to effect the functioning of specific genes for investigative or therapeutic purposes.
RNA molecules which hybridize to complementary sequences in either RNA or DNA altering the function of the latter. Endogenous antisense RNAs function as regulators of gene expression by a variety of mechanisms. Synthetic antisense RNAs are used to effect the functioning of specific genes for investigative or therapeutic purposes.
RNA, usually prepared by transcription from cloned DNA, which complements a specific mRNA or DNA and is generally used for studies of virus genes, distribution of specific RNA in tissues and cells, integration of viral DNA into genomes, transcription, etc. Whereas DNA PROBES are preferred for use at a more macroscopic level for detection of the presence of DNA/RNA from specific species or subspecies, RNA probes are preferred for genetic studies. Conventional labels for the RNA probe include radioisotope labels 32P and 125I and the chemical label biotin. RNA probes may be further divided by category into plus-sense RNA probes, minus-sense RNA probes, and antisense RNA probes.
Dna Topoisomerases, Type Ii
DNA TOPOISOMERASES that catalyze ATP-dependent breakage of both strands of DNA, passage of the unbroken strands through the breaks, and rejoining of the broken strands. These enzymes bring about relaxation of the supercoiled DNA and resolution of a knotted circular DNA duplex.
Dna Topoisomerase Iv
A bacterial DNA topoisomerase II that catalyzes ATP-dependent breakage of both strands of DNA, passage of the unbroken strands through the breaks, and rejoining of the broken strands. Topoisomerase IV binds to DNA as a heterotetramer consisting 2 parC and 2 parE subunits. Topoisomerase IV is a decatenating enzyme that resolves interlinked daughter chromosomes following DNA replication.
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