Method for detecting a target substance by using a nucleic acid probe
First Claim
1. A method for detecting a target substance, comprising the steps of:
- forming a first complex comprising (a) a first nucleic acid probe immobilized on a first solid phase and having a single-strand portion, (b) a nucleic acid ligand which has a binding section as a base sequence hybridizable with the single-strand portion of the first nucleic acid probe and which has a target-binding substance capable of binding to the target substance, (c) the target substance, and (d) a labeling substance capable of binding to the target substance;
separating, from the first complex, a second complex comprising the nucleic acid ligand, the target substance and the labeling substance; and
detecting the target substance on the basis of the labeling substance in the second complex.
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Abstract
A method for detecting a target substance is described, which comprises the steps of: forming a first complex comprising (a) a first nucleic acid probe immobilized on a first solid phase and having a single-strand portion, (b) a nucleic acid ligand which has a binding section as a base sequence hybridizable with the single-strand portion of the first nucleic acid probe and which has a target-binding substance capable of binding to the target substance, (c) the target substance, and (d) a labeling substance capable of binding to the target substance; separating, from the first complex, a second complex comprising the nucleic acid ligand, the target substance and the labeling substance; and detecting the target substance on the basis of the labeling substance in the second complex.
19 Citations
20 Claims
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1. A method for detecting a target substance, comprising the steps of:
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forming a first complex comprising (a) a first nucleic acid probe immobilized on a first solid phase and having a single-strand portion, (b) a nucleic acid ligand which has a binding section as a base sequence hybridizable with the single-strand portion of the first nucleic acid probe and which has a target-binding substance capable of binding to the target substance, (c) the target substance, and (d) a labeling substance capable of binding to the target substance;
separating, from the first complex, a second complex comprising the nucleic acid ligand, the target substance and the labeling substance; and
detecting the target substance on the basis of the labeling substance in the second complex. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A method for collecting a target substance, comprising the steps of:
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forming a first complex comprising (a) a first nucleic acid probe immobilized on a first solid phase and having a single-strand portion, (b) a nucleic acid ligand which has a binding section hybridizable with the single-strand portion of the first nucleic acid probe and which has a target-binding substance capable of binding to the target substance, (c) the target substance, and (d) a labeling substance capable of binding to the target substance;
separating, from the first complex, a second complex comprising the nucleic acid ligand, the target substance and the labeling substance; and
collecting the separated second complex.
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17. A reagent kit for detection of a target substance, comprising:
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a first solid phase on which a first nucleic acid probe having a single-strand portion is immobilized;
a nucleic acid ligand having both a binding section hybridizable with the single-strand portion of the first nucleic acid probe and a target-binding substance capable of binding to the target substance;
a second solid phase on which a second nucleic acid probe having a single-strand portion hybridizable with the binding section of the nucleic acid ligand is immobilized; and
a labeling substance capable of binding to the target substance. - View Dependent Claims (18, 19, 20)
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Specification