Abstract:
Covalent cross-linkages for two oligonucleotide strands or for first and second regions of a single oligonucleotide strand connect sugar moieties of nucleotides on the respective strands or the regions of the single strand. The cross-linkages are connected to at least one strand or region via a space-spanning group. The cross-linkage also can be connected to the other strand or other region via a space-spanning group or via an abasic site located on the other strand or other region.
Abstract:
Methods useful for the determination of oligomers which have specific activity for a target molecule from a pool of primarily randomly assembled subunits are provided. The disclosed methods involve repeated syntheses of increasingly simplified sets of oligomers coupled with selection procedures for determining oligomers having the highest activity. Freedom from the use of enzymes allows the application of these methods to any molecules which can be oligomerized in a controlled fashion.
Abstract:
Oligonucleotides which selectively bind to target biomolecules may be determined by in vitro assay of a pool of random oligonucleotides for activity against said biomolecules, followed by recovery and characterization of selected oligonucleotides. Oligonucleotides so determined may be utilized for therapeutic, diagnostic and research reagent purposes.
Abstract:
Expression of genes may be modulated by employment of compositions which are capable of RNA mimicry. A portion of RNA coded by the gene whose expression is to be modulated is selected which is capable of interacting with one or more proteins. An oligonucleotide or oligonucleotide analog is then prepared in such a way as to mimic the portion of the RNA. Cells containing the gene are then contacted with the oligonucleotide or oligonucleotide analog to effect the modulation. Therapeutic compositions and methods, especially for the treatment of human immunodeficiency, are disclosed.
Abstract:
Compositions and methods for modulating the activity of RNA are disclosed. In accordance with preferred embodiments, antisense compositions are prepared comprising targeting and reactive portions. The reactive portions preferably comprise one or two imidazole functionalities conjugated to the targeting oligonucleotide via linkers with or without intervening intercalating moieties. Therapeutics, diagnostics and research methods also are disclosed, as are synthetic nucleosides and nucleoside fragments that can be elaborated into oligonucleotides.