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Stability and Structural Features of the Duplexes Containing Nucleoside Analogues with a Fixed N‐Type Conformation, 2′‐O,4′‐C‐Methyleneribonucleosides.
The unique target specificity of a nonpeptide chemokine receptor antagonist: selective blockade of two Th1 chemokine receptors CCR5 and CXCR3
CC chemokine receptor (CCR) 5 and CXC chemokine receptor (CXCR)3 are expressed on T helper cell type 1 cells and have been implicated in their migration to sites of inflammation. Our preceding study… Expand
Stability and structural features of the duplexes containing nucleoside analogues with a fixed N-type conformation, 2'-O,4'- C-methyleneribonucleosides
Bicyclic nucleoside analogues with a fixed N-type conformation, 2′-O,4′-C-methyleneuridine and -cytidine, were incorporated into oligonucleotides, and the binding efficiency of the modified… Expand
2′-O,4′-C-Methylene Bridged Nucleic Acid Modification Promotes Pyrimidine Motif Triplex DNA Formation at Physiological pH
- H. Torigoe, Y. Hari, M. Sekiguchi, S. Obika, T. Imanishi
- Medicine, Chemistry
- The Journal of Biological Chemistry
- 26 January 2001
Extreme instability of pyrimidine motif triplex DNA at physiological pH severely limits its use in an artificial control of gene expression in vivo. Stabilization of the pyrimidine motif triplex at… Expand
A non‐peptide CCR5 antagonist inhibits collagen‐induced arthritis by modulating T cell migration without affecting anti‐collagen T cell responses
The chemokine receptors CCR5 and CXCR3 have been implicated as playing a central role in directing a Th1 inflammatory response. Here, we investigated whether a synthetic CCR5 antagonist affects the… Expand
Synthesis of 2′-O,4′-C-methyleneuridine and -cytidine. Novel bicyclic nucleosides having a fixed C3, -endo sugar puckering
2′-O,4′-C-Methyleneuridine and -cytidine, novel bicyclic nucleoside analogs having a typical C3′-endo sugar puckering, were synthesized starting from uridine via a several-step sequence.
2'-O,4'-C-Methylene bridged nucleic acid (2',4'-BNA): synthesis and triplex-forming properties.
- S. Obika, T. Uneda, +4 authors T. Imanishi
- Chemistry, Medicine
- Bioorganic & medicinal chemistry
- 1 April 2001
For development of ideal antisense and antigene molecules, various chemical modifications of oligonucleotides have been studied. However, despite their importance, there is only limited information… Expand
Triplex formation with 2'-O,4'-C-ethylene-bridged nucleic acids (ENA) having C3'-endo conformation at physiological pH.
Antigenes, which are substances that inhibit gene expression by binding to double-stranded DNA (dsDNA) in a sequence-specific manner, are currently sought for the treatment of various gene-related… Expand
Synthesis and conformation of 3′,4′-BNA monomers, 3′-O,4′-C-methyleneribonucleosides
Abstract In order to develop novel 2′,5′-linked oligonucleotide analogues aimed for antivirus reagents and antisense/antigene oligonucleotides, novel nucleoside analogues,… Expand
2',4'-BNA/LNA aptamers: CE-SELEX using a DNA-based library of full-length 2'-O,4'-C-methylene-bridged/linked bicyclic ribonucleotides.
- Yuuya Kasahara, Yuuta Irisawa, H. Ozaki, S. Obika, M. Kuwahara
- Chemistry, Medicine
- Bioorganic & medicinal chemistry letters
- 1 March 2013
DNA-based aptamers that contain 2'-O,4'-C-methylene-bridged/linked bicyclic ribonucleotides (B/L nucleotides) over the entire length were successfully obtained using a capillary electrophoresis… Expand