Multiple-component binding assay system and method of making and using it
First Claim
1. For use in the diagnostic analysis of a liquid specimen through binding assays, a diagnostic system comprising a plurality of filaments supported in a spaced relationship for simultaneous contact with said liquid specimen, at least two of said filaments being coated with binding assay components from different assays, for multiple, coincident measurement of said assays.
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Accused Products
Abstract
A multiple component binding assay system, and related methods of making and using it, having a plurality of coated filaments mounted at their opposite ends on a support, in a predetermined spaced relationship, for simultaneously screening a liquid test sample for a plurality of components. The system is particularly suitable for screening the sample for IgE class antibodies specific for certain allergens. The filaments are preferably cotton threads, each thread binding a different allergen through a covalent bond. The support, which is preferably cut away adjacent the mid-portion of each filament to reduce background interference, is composed of a plastic or other water insoluble material, permitting inexpensive and relatively simple manufacture. After any IgE class antibodies present in the liquid sample have reacted with the corresponding allergens coated on the filaments, they are detected using second antibodies labeled with radioactive, fluorescent or enzymatic tracers. By using a high energy radioactive tracer, such as 125 I, autoradiographic techniques with phosphor screen enhancement allow for diagnostic analysis by a densitometer or even the unaided human eye.
79 Citations
57 Claims
- 1. For use in the diagnostic analysis of a liquid specimen through binding assays, a diagnostic system comprising a plurality of filaments supported in a spaced relationship for simultaneous contact with said liquid specimen, at least two of said filaments being coated with binding assay components from different assays, for multiple, coincident measurement of said assays.
- 6. A diagnostic test kit useful in screening for the presence of multiple allergen-specific IgE class antibodies in a liquid test sample, said kit comprising a plurality of threads supported in a predetermined spaced relationship for simultaneous contact with said test sample, wherein at least two of said threads are coated with allergen compositions specific to different IgE class antibodies.
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17. A method of detecting the presence of biological agents in a liquid specimen through binding assays, said method comprising the steps of:
- incubating said liquid specimen with a plurality of filaments supported in a predetermined spaced relationship, at least two of said filaments being coated with binding assay components from different assays; and
analyzing said filaments to coincidently determine which of the biological agents, interact with said binding assay component coated on each of said filaments. - View Dependent Claims (18, 19, 20)
- incubating said liquid specimen with a plurality of filaments supported in a predetermined spaced relationship, at least two of said filaments being coated with binding assay components from different assays; and
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21. A method of screening for the presence of multiple allergen-specific IgE class antibodies in a liquid test sample, said method comprising the steps of:
- incubating said test sample with a plurality of filaments supported on a support in a predetermined spaced relationship and coated with allergens specific to said IgE class antibodies;
removing said filaments from said test sample;
incubating said filaments with a solution containing labeled antibodies that are reactive with said IgE class antibodies;
removing said filaments from said solution; and
analyzing said filaments to determine the presence of said labeled antibodies;
wherein at least two of said filaments are coated with different allergens. - View Dependent Claims (22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35)
- incubating said test sample with a plurality of filaments supported on a support in a predetermined spaced relationship and coated with allergens specific to said IgE class antibodies;
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36. A method of making an apparatus useful in the diagnostic analysis of liquid specimens through binding assays, said method comprising the steps of:
- coating each of a plurality of filaments with components of different binding assays; and
attaching the coated filaments to a support such that they are arranged in spaced relationship. - View Dependent Claims (37, 38, 39, 40, 41, 42, 43)
- coating each of a plurality of filaments with components of different binding assays; and
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44. A method of making a miniature apparatus for use in the simultaneous determination of the presence of multiple allergen-specific IgE class antibodies in a liquid test sample, said method comprising the steps of:
- coating a filament with an allergen composition specific to at least one of said IgE class antibodies; and
attaching a plurality of said filaments to a support;
wherein at least two of said filaments attached to said support are coated with different allergen compositions. - View Dependent Claims (45, 46, 47, 48, 49, 50, 51)
- coating a filament with an allergen composition specific to at least one of said IgE class antibodies; and
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54. A method of detecting the presence of multiple biological agents in a liquid specimen through binding assays, comprising steps of:
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incubating the liquid specimen with a diagnostic device having a plurality of filaments secured to a support member, at least two of the filaments being coated with binding assay components that react with different biological agents that might be present in the specimen; separating the liquid specimen and the diagnostic device from each other; incubating the diagnostic device with a solution containing labeled components that will bind to any of the biological agents that might have bound to the binding assay components in the first step of incubating; separating the diagnostic device and the solution from each other; and positioning the diagnostic device proximate to a photographic film, to expose a pattern in the film indicative of the presence of labeled components on each of the filaments. - View Dependent Claims (55, 56, 57)
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Specification