Process for immunochromatography with colloidal particles
First Claim
1. A method for determining the presence or amount of an analyte in a test sample, comprising the steps of:
- a) contacting a chromatographic medium with the test sample, said medium comprising at least two reaction sites,a first reaction site comprising a dried solution of a labelled specific binding reagent in the presence of a meta-soluble protein, anda second reaction site comprising an immobilized specific binding reagent capable of immobilizing said labelled reagent in relation to the presence or amount of the analyte in the test sample;
b) solubilizing said labelled reagent and transporting at least a portion of said labelled reagent to said second reaction site, and binding said labelled reagent to said second reaction site in relation to the presence or amount of the analyte in the test sample; and
c) detecting said labelled reagent at said second site to determine the presence or amount of the analyte in the test sample.
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Accused Products
Abstract
The present invention relates to improved specific binding assay methods, kits and devices utilizing chromatographically mobile specific binding reagents labelled with colloidal particles. Specific binding reagents labelled with colloidal particles such as gold and selenium may be subjected to rapid chromatographic solvent transport on chromatographic media by means of selected solvents and chromatographic transport facilitating agents. Further, impregnation of solid substrate materials with labile protein materials including colloidal particle and enzyme labelled reagents in the presence of meta-soluble proteins provides for the rapid resolubilization of such materials which have been dried onto such substrate materials.
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Citations
31 Claims
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1. A method for determining the presence or amount of an analyte in a test sample, comprising the steps of:
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a) contacting a chromatographic medium with the test sample, said medium comprising at least two reaction sites, a first reaction site comprising a dried solution of a labelled specific binding reagent in the presence of a meta-soluble protein, and a second reaction site comprising an immobilized specific binding reagent capable of immobilizing said labelled reagent in relation to the presence or amount of the analyte in the test sample; b) solubilizing said labelled reagent and transporting at least a portion of said labelled reagent to said second reaction site, and binding said labelled reagent to said second reaction site in relation to the presence or amount of the analyte in the test sample; and c) detecting said labelled reagent at said second site to determine the presence or amount of the analyte in the test sample. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A test device for determining the presence or amount of an analyte in a test sample, comprising:
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a chromatographic medium having capillarity and the capacity for transport of non-immobilized reagents and reactive sample components, and comprising at least two reaction sites, wherein a first reaction site comprises a dried solution of a labelled specific binding reagent in the presence of a meta-soluble protein, said labelled specific binding reagent being solubilized and transported through said chromatographic medium upon contact with a chromatographic solvent or a test sample, and wherein a second reaction site comprises an immobilized specific binding reagent capable of immobilizing said labelled reagent in relation to the presence or amount of the analyte in the test sample. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30)
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31. A kit for use in specific binding assays for determining the presence or amount of an analyte in a test sample, comprising:
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a) a chromatographic medium having a capillarity and the capacity for transport of non-immobilized reagents and reactive sample components, and comprising at least two reaction sites, wherein a first reaction site comprises a labelled specific binding reagent, in the presence of a meta-soluble protein, wherein said labelled specific binding reagent is capable of being solubilized and transported through said chromatographic medium upon contact with a chromatographic solvent, and wherein a second reaction site comprises an immobilized specific binding reagent capable of immobilizing said labelled reagent in relation to the presence or amount of the analyte in the test sample; and b) a chromatographic solvent.
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Specification