Method of preventing undesired binding in solid phase assays
First Claim
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1. A specific binding assay method for determining an analyte in a sample with reduced nonspecific interference from non-analyte constituents in said sample comprising:
- (a) providing a solid phase comprising a polymer surface having immobilized thereto a ligand capable of specifically binding said analyte;
(b) adding one or more monomeric, oligomeric or polymeric chain fragments of said polymer to said sample wherein said fragments are at least partially soluble in said sample, to form a reaction medium;
(c) contacting said reaction medium with said solid phase; and
(d) measuring any binding of said analyte to said contacted solid phase to determine the presence or amount of said analyte in said sample, wherein said nonspecific interference is reduced in that said non-analyte constituents bind to said fragments in said reaction medium rather than to said solid phase.
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Abstract
In assays of the type which comprise contacting the sample containing the analyte to be detected with a solid phase surface supporting a ligand capable of binding the analyte, undesired binding to the surface is prevented to a substantial degree by adding to the sample one or more components of the material forming the ligand supporting solid phase surface, which components are in at least partially soluble form and capable of interacting with constituents of the sample medium.
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Citations
25 Claims
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1. A specific binding assay method for determining an analyte in a sample with reduced nonspecific interference from non-analyte constituents in said sample comprising:
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(a) providing a solid phase comprising a polymer surface having immobilized thereto a ligand capable of specifically binding said analyte; (b) adding one or more monomeric, oligomeric or polymeric chain fragments of said polymer to said sample wherein said fragments are at least partially soluble in said sample, to form a reaction medium; (c) contacting said reaction medium with said solid phase; and (d) measuring any binding of said analyte to said contacted solid phase to determine the presence or amount of said analyte in said sample, wherein said nonspecific interference is reduced in that said non-analyte constituents bind to said fragments in said reaction medium rather than to said solid phase. - 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)
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25. A specific binding assay method for determining an analyte in a sample with reduced nonspecific interference from non-analyte constituents in an aqueous sample containing or suspected of containing the analyte to be detected comprising:
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(a) providing a solid phase surface comprising an organic hydrogel surface having immobilized thereto a ligand capable of specifically binding said analyte; (b) adding one or more water soluble monomeric, oligomeric or polymeric fragments of said organic hydrogel to said sample wherein said fragments are at least partially soluble in said sample, to form a reaction medium; (c) contacting said reaction medium with said solid phase; and (d) measuring any binding of said analyte to said contacted solid phase to determine the presence or amount of said analyte in said sample, wherein said nonspecific interference is reduced in that said non-analyte constituents bind to said fragments in said reaction medium rather than to said solid phase.
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Specification