Label modified immunoassays
First Claim
1. An assay method for determining a member of an immunological pair comprising a mono- or polyepitopic ligand and an anti(ligand) suspected of being present in a sample;
- said method employing;
(1) labeled anti(ligand), wherein the label is capable of providing a detectable signal and said labeled anti(ligand) binds to said polyepitopic ligand to form a complex;
(2) a macromolecular modifier which interacts with said label to modify the signal produced from said label and is inhibited from interacting with said label by said complex;
(3) poly(ligand analog), wherein poly(ligand analog) has a plurality of epitopic sites capable of competing with said monoepitopic ligand for the binding sites of labeled anti(ligand), and capable of binding with anti(ligand) and labeled anti(ligand) to form a complex; and
(4) polyepitopic ligand;
with the proviso that poly(ligand analog) is only employed in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand and polyepitopic ligand is only employed in an assay for anti(ligand) that binds polyepitopic ligand;
said method comprising;
(A) combining in an assay medium for a time sufficient to form said complexes which sterically inhibit the approach of the macromolecular modifier to said label;
(i) sample;
(ii) labeled anti(ligand);
(iii) modifier;
(iv) poly(ligand analog) in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand; and
(v) polyepitopic ligand in an assay for anti(ligand) that binds polyepitopic ligand;
(B) exposing said assay medium to an agent which interacts with said label to provide said detectable signal; and
(C) measuring said detectable signal, wherein the measured detectable signal is directly related to the amount of said member in said medium.
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and reagents are provided for immunoassays employing as reagents a labelled receptor, where the label is capable of providing a detectable signal, and modifying reagents, capable of modifying the signal obtained from the label. When ligand (ligand analog for monoepitopic ligands) is present in the assay medium, a complex is formed which inhibits interaction between the label modifying reagent and the label. By measuring the signal obtained in the presence of a known amount of ligand in the assay medium and comparing that signal with the signal obtained with an unknown sample suspected of containing ligand, one can qualitatively or quantitatively determine the amount of ligand in the unknown. For determinating anti(ligand) the assay is carried out in substantially the same way, except a source of ligand or ligand analog must be provided.
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Citations
37 Claims
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1. An assay method for determining a member of an immunological pair comprising a mono- or polyepitopic ligand and an anti(ligand) suspected of being present in a sample;
- said method employing;
(1) labeled anti(ligand), wherein the label is capable of providing a detectable signal and said labeled anti(ligand) binds to said polyepitopic ligand to form a complex; (2) a macromolecular modifier which interacts with said label to modify the signal produced from said label and is inhibited from interacting with said label by said complex; (3) poly(ligand analog), wherein poly(ligand analog) has a plurality of epitopic sites capable of competing with said monoepitopic ligand for the binding sites of labeled anti(ligand), and capable of binding with anti(ligand) and labeled anti(ligand) to form a complex; and (4) polyepitopic ligand;
with the proviso that poly(ligand analog) is only employed in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand and polyepitopic ligand is only employed in an assay for anti(ligand) that binds polyepitopic ligand;said method comprising; (A) combining in an assay medium for a time sufficient to form said complexes which sterically inhibit the approach of the macromolecular modifier to said label; (i) sample; (ii) labeled anti(ligand); (iii) modifier; (iv) poly(ligand analog) in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand; and (v) polyepitopic ligand in an assay for anti(ligand) that binds polyepitopic ligand; (B) exposing said assay medium to an agent which interacts with said label to provide said detectable signal; and (C) measuring said detectable signal, wherein the measured detectable signal is directly related to the amount of said member in said medium. - View Dependent Claims (2, 3, 4, 5, 6, 7, 29, 30, 31, 32)
- said method employing;
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8. An assay method for determining a polyepitopic ligand suspected of being present in the sample;
- said method employing;
(1) enzyme labeled anti(ligand), wherein the enzyme is capable of providing a detectable signal and said enzyme labeled anti(ligand) binds to said polyepitopic ligand to form a complex; (2) anti(enzyme), which binds to said enzyme to substantially inhibit said enzyme;
said method comprising;(A) combining in an assay medium (i) sample; (ii) enzyme labeled anti(ligand); (B) incubating said assay medium for a time sufficient to form complexes which sterically inhibit the approach of said anti(enzyme) to said enzyme label; (C) adding to said assay medium anti(enzyme), substrates and any cofactors for said enzyme to produce a detectable signal as a result of the chemical change in the substrates or cofactors; and (D) measuring said detectable signal, wherein the measured detectable signal is proportional to the amount of said polyepitopic ligand in said assay medium. - View Dependent Claims (9, 10, 11, 12, 33, 34)
- said method employing;
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13. An assay method for determining a monoepitopic ligand suspected of being present in the sample;
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said method employing; (1) poly(ligand analog) (2) enzyme labeled anti(ligand), wherein the enzyme is capable of providing a detectable signal and said enzyme labeled anti(ligand) binds to said poly(ligand analog) to form a complex; (3) anti(enzyme), which binds to said enzyme to substantially inhibit said enzyme;
said method comprising;(A) combining in an assay medium (i) sample; (ii) enzyme labeled anti(ligand); (iii) poly(ligand analog) (B) incubating said assay medium for a sufficient time to form complexes which sterically inhibit the approach of said anti(enzyme) to said enzyme label; (C) adding to said assay medium anti(enzyme), substrates and any cofactors for said enzyme to produce a detectable signal as a result of the chemical change in the substrates or cofactors; and (D) measuring said detectable signal, wherein the measured detectable signal is directly related to the amount of said monoepitopic ligand in said assay medium. - View Dependent Claims (14, 15, 16, 17, 18)
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19. An assay method for determining a polyepitopic ligand suspected of being present in a sample;
- said method employing;
(1) fluorescer labeled anti(ligand), wherein said fluorescer labeled anti(ligand) binds to said polyepitopic ligand to form a complex; and (2) anti(fluorescer);
said method comprising;(A) combining in an assay medium at a pH of from about 6 to 9 and at a temperature in the range of about 15°
to 40°
C.(i) sample; (ii) fluorescer labeled anti(ligand); (B) incubating said assay medium for a sufficient time to form complexes which sterically inhibit the approach of said anti(fluorescer) to the fluorescent label; (C) adding anti(fluorescer) in an amount at least about stoichiometric with the amount of fluorescer and exciting fluorescer to an electronically excited state capable of emitting light; and (D) measuring said emitted light, wherein the measured emitted light is directly related to the amount of said polyepitopic ligand present in said medium. - View Dependent Claims (20, 21)
- said method employing;
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22. An assay method for determining a monoepitopic ligand suspected of being present in a sample;
- said method employing;
(1) poly(ligand analog), said poly(ligand analog) having a plurality of ligand analogs capable of competing with ligand for antiligand bonded to a water soluble hub nucleus (2) fluorescer labeled anti(ligand), wherein said fluorescer labeled anti(ligand) binds to said poly(ligand analog) ligand to form a complex; (3) anti(fluroescer);
said method comprising;(A) combining in an assay medium at a pH of from about 6 to 9 and at a temperature in the range of about 15°
to 40°
C.(i) sample; (ii) fluorescer labeled anti(ligand); (iii) poly(ligand analog) (B) incubating said assay medium for a sufficient time to form complexes which sterically inhibit the approach of said anti(fluorescer) to the fluorescent label; (C) adding anti(fluorescer) in an amount at least about stoichiometric with the amount of fluorescer and exciting fluorescer to an electronically excited state capable of emitting light; and (D) measuring said emitted light, wherein the measured emitted light is directly related to the amount of said monoepitopic ligand present in said medium. - View Dependent Claims (23)
- said method employing;
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24. An assay method for determining an anti(ligand) that binds to a polyepitopic ligand, said anti(ligand) suspected of being present in a sample, said method employing
(1) polyepitopic ligand; -
(2) labeled anti(ligand), wherein the label is capable of providing a detectable signal and said labeled anti(ligand) and anti(ligand) bind to said ligand to form a complex; (3) a macromolecular modifier which interacts with said label to modify the signal produced from said label and is inhibited from interacting with said label by said complex, said modifier being added in at least about an amount sufficient to interact with said label to modify said signal; said method comprising; (A) combining in an assay medium at a pH in the range of about 6 to 9 and at a temperature in the range of about 15°
to 40°
C. for a time sufficient to form complexes which sterically inhibit the approach of the macromolecular modified to said label(i) sample; (ii) labeled anti(ligand); (iii) modifier; (iv) polyepitopic ligand; (B) exposing said assay medium to an agent which interacts with said label to provide said detectable signal; and (C) measuring said detectable signal, wherein the measured detectable signal is directly related to the amount of said anti(ligand) in said medium. - View Dependent Claims (25, 26, 27)
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28. An assay method for determining a member of an immunological pair comprising a mono- or polyepitopic ligand and an anti(ligand) suspected of being present in a sample;
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said method employing; (1) labeled anti(ligand), wherein the label is capable of providing a detectable signal and said labeled anti(ligand) binds to said polyepitopic ligand to form a complex; (2) a Fab anti(label) which interacts with said label to modify the signal produced from said label and is inhibited from interacting with said label by said complex; (3) poly(ligand analog), wherein poly(ligand analog) has a plurality of epitopic sites capable of competing with said monoepitopic ligand for the binding sites of labeled anti(ligand), and capable of binding with anti(ligand) and labeled anti(ligand) to form a complex; and (4) polyepitopic ligand; with the proviso that poly(ligand analog) is only employed in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand and ligand is only employed in an assay for anti(ligand) that binds polyepitopic ligand; said method comprising; (A) combining in an assay medium for a time sufficient to form complexes which sterically inhibit the approach of the Fab anti(label) to said label; (i) sample; (ii) labeled anti(ligand); (iii) Fab anti(label); (iv) poly(ligand analog) in an assay for monoepitopic ligand or anti(ligand) that binds monoepitopic ligand; and (v) ligand in an assay for anti(ligand) that binds poly(epitopic ligand); (B) exposing said assay medium to an agent which interacts with said label to provide said detectable signal; and (C) measuring said detectable signal, wherein the measured detectable liquid is directly related to the amount of said member in said medium. - View Dependent Claims (35, 36, 37)
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Specification