Fluorescence polarization immunoassay
First Claim
1. A compound of the formula ##STR42## wherein R is a ligand-analog of an aromatic carbon-containing ligand having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has an aromatic carbon by which the ligand-analog is attached to the sulfonamidofluorescein moiety;
- and biologically acceptable salts thereof.
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Abstract
This disclosure relates to a method and reagents for determining ligands in biological fluids such as serum, plasma, spinal fluid, amnionic fluid and urine. In particular, this disclosure relates to a fluorescence polarization immunoassay procedure and to a novel class of tracer compounds employed as reagents in such procedures. The procedure disclosed combines the specificity of an immunoassay with the speed and convenience of fluorescence polarization techniques to provide a means for determining the amount of the specific ligand present in a sample.
66 Citations
56 Claims
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1. A compound of the formula ##STR42## wherein R is a ligand-analog of an aromatic carbon-containing ligand having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has an aromatic carbon by which the ligand-analog is attached to the sulfonamidofluorescein moiety;
and biologically acceptable salts thereof. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A compound of the formula ##STR48## wherein R is a ligand-analog having a molecular weight in range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog is attached to the carboamidosulfonylaminofluorescein moiety through a hydroxy oxygen or a reactive amine;
and biologically acceptable salts thereof. - View Dependent Claims (15, 16, 17, 18, 20, 21, 22)
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19. A compound of the formula wherein R is ##STR50##
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23. A compound of the formula ##STR51## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has a reactive nitrogen by which the ligand-analog is attached to the oxalylaminofluorescein moiety;
and biologically acceptable salts thereof.
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24. A compound of the formula:
- ##STR52## and biologically acceptable salts thereof.
- View Dependent Claims (25, 26, 27, 28, 29, 30, 31)
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32. A method for determining ligands in a sample comprising intermixing with said sample a biologically acceptable salt of a tracer of the formula:
- ##STR54## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has an aromatic carbon by which the ligand-analog is attached to the sulfonamidofluorescein moiety;
and an antibody capable of specifically recognizing said ligand and said tracer and then determining the amount of tracer bound to antibody by fluorescence polarization techniques as a measure of the amount of ligand in the sample. - View Dependent Claims (33, 34, 35, 36, 37, 38, 39, 40, 41, 42)
- ##STR54## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has an aromatic carbon by which the ligand-analog is attached to the sulfonamidofluorescein moiety;
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43. A method for determining ligands in a sample comprising intermixing with said sample a biologically acceptable salt of a tracer of the formula:
- ##STR55## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog is attached to the carboamidosulfonylamino group moiety through a hydroxy oxygen or a reactive amine;
and biologically acceptable salts thereof. - View Dependent Claims (44, 45, 46, 47, 48, 49)
- ##STR55## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog is attached to the carboamidosulfonylamino group moiety through a hydroxy oxygen or a reactive amine;
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50. A method for determining ligands in a sample comprising intermixing with said sample a biologically acceptable salt of a tracer of the formula:
- ##STR56## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has a reactive nitrogen by which the ligand-analog is attached to the oxalylaminofluorescein moiety;
and biologically acceptable salts thereof. - View Dependent Claims (51, 52, 53, 54, 55, 56)
- ##STR56## wherein R is a ligand-analog having a molecular weight in a range of 100 to 2000 wherein said ligand-analog has at least one common epitope with said ligand so as to be specifically recognizable by a common antibody and said ligand-analog has a reactive nitrogen by which the ligand-analog is attached to the oxalylaminofluorescein moiety;
Specification