Particle bound binding component immunoassay
First Claim
1. A method for detection or quantitation of an analyte in a solution comprising the steps of:
- (a) contacting the solution with insoluble particles having attached thereto a binding component specific for the analyte, so as to form a suspension comprising a first complex wherein the first complex comprises the analyte, the binding component and the insoluble particle;
(b) applying the suspension to at least a portion of a semi-permeable membrane having interstices of dimensions relative to the insoluble particles and having a thickness such that the insoluble particles are retained throughout the thickness of the semi-permeable membrane, the portion of the semi-permeable membrane retaining the insoluble particles defining an assay zone;
(c) contacting the semi-permeable membrane containing the assay zone with a labeling component capable of specifically binding to the first complex so as to form a second complex wherein the second complex comprises the first complex and the labeling component, the semi-permeable membrane permitting the labeling component which is not bound to the first complex to pass out of the assay zone; and
(d) measuring the signal produced by the labeling component of the second complex as an indicator of the presence or amount of the analyte present in the solution.
2 Assignments
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Accused Products
Abstract
An immunoassay method for the detection or quantitation of an analyte suspected of being in a solution comprising: (a) combining said specimen, a first binding component, insoluble particles, and second binding component labelled with a signal generating material in a solid phase retention and separation apparatus having a sufficient pore size such that said particles are trapped within said filter yet permitting rapid passage of fluid therethrough in such a manner that an immunological reaction occurs if analyte is present in said specimen, resulting in the formation of an immunocomplex of insolublized first binding component:analyte:second labelled binding component on or within said filter means; (b) separating bound from unbound material; and (c) determining the presence and/or amount of signal produced which is correlative with the amount of analyte present in the solution.
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Citations
26 Claims
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1. A method for detection or quantitation of an analyte in a solution comprising the steps of:
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(a) contacting the solution with insoluble particles having attached thereto a binding component specific for the analyte, so as to form a suspension comprising a first complex wherein the first complex comprises the analyte, the binding component and the insoluble particle; (b) applying the suspension to at least a portion of a semi-permeable membrane having interstices of dimensions relative to the insoluble particles and having a thickness such that the insoluble particles are retained throughout the thickness of the semi-permeable membrane, the portion of the semi-permeable membrane retaining the insoluble particles defining an assay zone; (c) contacting the semi-permeable membrane containing the assay zone with a labeling component capable of specifically binding to the first complex so as to form a second complex wherein the second complex comprises the first complex and the labeling component, the semi-permeable membrane permitting the labeling component which is not bound to the first complex to pass out of the assay zone; and (d) measuring the signal produced by the labeling component of the second complex as an indicator of the presence or amount of the analyte present in the solution. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A method for detection or quantitation of an analyte in a solution comprising the steps of:
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(a) contacting the solution with insoluble particles having attached thereto a binding component specific for the analyte so as to form a first complex wherein the first complex comprises the analyte, the binding component and the insoluble particle and with a labeling component capable of specifically binding to the first complex so as to form a suspension comprising a second complex, wherein the second complex comprises the first complex and the labeling component; (b) applying the suspension to at least a portion of a semi-permeable membrane having interstices of dimensions relative to the insoluble particles and having a thickness such that the insoluble particles are retained throughout the thickness of the semi-permeable membrane, the semi-permeable membrane permitting the soluble labeling component which is not bound to the insoluble particles to pass therethrough; and (c) measuring the signal produced by the labeling component of the second complex as an indicator of the presence or amount of the analyte present in the specimen solution. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26)
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Specification