Target detection method using spectroscopically detectable nucleic acid ligands
First Claim
1. A method for detecting the presence of a target compound in a sample, said target compound selected from the group consisting of proteins, peptides, cell surface markers, carbohydrates, polysaccharides, glycoproteins, hormones, receptors, antigens, antibodies, co-factors, inhibitors, drugs, dyes, nutrients, growth factors, amino acids, ATP, whole cells and viral particles using a spectroscopically detectable labeled nucleic acid ligand comprising:
- (a) measuring the spectroscopic emissions of the spectroscopically detectable labeled nucleic acid ligand;
(b) mixing the sample with the spectroscopically detectable labeled nucleic acid ligand whereby the spectroscopically detectable labeled nucleic acid ligand complexes with the target compound; and
(c) determining whether there is a difference between (i) spectroscopic emissions of the spectroscopically detectable labeled nucleic acid ligand as determined in step (a) and (ii) spectroscopic emissions of the complex of spectroscopically detectable labeled nucleic acid ligand and target compound, whereby an increase in the spectroscopic emission of the complex of step (b) relative to the nucleic acid ligand of step (a) is indicative of the presence of the target compound in the sample.
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Abstract
The invention relates to methods of using spectroscopically detectable labeled receptor molecules to determine the presence or absence of a target compound in a sample. In one embodiment, spectroscopically detectable labeled nucleic acid ligands are used to determine the presence or absence of biological targets of interest in biological samples.
50 Citations
36 Claims
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1. A method for detecting the presence of a target compound in a sample, said target compound selected from the group consisting of proteins, peptides, cell surface markers, carbohydrates, polysaccharides, glycoproteins, hormones, receptors, antigens, antibodies, co-factors, inhibitors, drugs, dyes, nutrients, growth factors, amino acids, ATP, whole cells and viral particles using a spectroscopically detectable labeled nucleic acid ligand comprising:
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(a) measuring the spectroscopic emissions of the spectroscopically detectable labeled nucleic acid ligand; (b) mixing the sample with the spectroscopically detectable labeled nucleic acid ligand whereby the spectroscopically detectable labeled nucleic acid ligand complexes with the target compound; and (c) determining whether there is a difference between (i) spectroscopic emissions of the spectroscopically detectable labeled nucleic acid ligand as determined in step (a) and (ii) spectroscopic emissions of the complex of spectroscopically detectable labeled nucleic acid ligand and target compound, whereby an increase in the spectroscopic emission of the complex of step (b) relative to the nucleic acid ligand of step (a) is indicative of the presence of the target compound in the sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34)
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35. A method of monitoring the binding of a target compound to its receptor in a sample using a spectroscopically detectable nucleic acid ligand in a competition-based assay, comprising:
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(a) measuring the spectroscopic emissions of the spectroscopically detectable nucleic acid ligand; (b) mixing the spectroscopically detectable nucleic acid ligand with the sample, whereby the spectroscopically detectable nucleic acid ligand complexes to the receptor in competition with the target compound; (c) measuring the spectroscopic emissions of the complex of the spectroscopically detectable nucleic acid ligand and receptor of step (b); (d) determining the degree of binding of the spectroscopically detectable nucleic acid ligand to the receptor from the spectroscopic emissions measured in step (c); and (e) calculating the degree of complexing of target compound to its receptor from the determination of the degree of binding in step (d). - View Dependent Claims (36)
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Specification