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EP0420102A2 Expired / Lapsed EP ⏱️ 0.0 years remaining

Stabilization of monoclonal antibody for use in fluorescent polarization techniques

Assignee: Abbott Laboratories
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Filing: 1990-09-24
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Granted: —
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Expires: 2010-09-24
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Abstract

Abstract A method for determining ligands in a sample is disclosed. The method involves mixing with the sample in which the ligand is to be determined a tracer having the formula of Fig. 1 of the attached drawings or a biologically acceptable salt of such a tracer, a monoclonal antibody, and glycerol added as a part of a solution of the monoclonal antibody in which the glycerol is present in an amount sufficient to increase the stability of the monoclonal antibody in the solution, and then determining the amount of tracer bound to the antibody by fluorescence polarization techniques as a measure of the amount of ligand in the sample. In Fig. 1 of the drawings R is a ligand or analog thereof having at least one common epitope with a ligand to be determined so that the ligand to be determined and the ligand or analog thereof of the tracer are both specifically recognizable by a given antibody, and N is an integer from one to ten. The monoclonal antibody used is one which is capable of specifically recognizing both the ligand to be determined and the tracer. Glycerol is used in the monoclonal antibody solution in an amount, usually from about 5 percent to about 20 percent, sufficient to increase the stability of the monoclonal antibody. The optimum glycerol concentration has been found to be about 10%.

Inventors

  • 👤 David R. Blonski
  • 👤 David J. Hawksworth
  • 👤 Charles A. Flentge
  • 👤 Charles Pennington, Jr.

Bibliographic Details

Application Number —
Jurisdiction EP
Data Source google_patents
Last Synchronized 2026-10-31 04:55
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/17; G01N21/21; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N33/5306; G01N33/58; G01N33/582; G01N33/94

Claims Analysis

Total Claims: 12
Claim 1
Independent Claim 167 words
A method for determining ligands in a sample, characterized in that said method comprises mixing with the sample: (a) a tracer having the following formula where R is a ligand or analog thereof having at least one common epitope with a ligand to be determined so that the ligand to be determined and the ligand or analog thereof of the tracer are both specifically recognizable by a given antibody, and n is an integer from one to ten, or a biologically acceptable salt of such a tracer, (b) a monoclonal antibody which is capable of specifically recognizing both the ligand to be determined and the tracer, and (c) glycerol added as a part of a solution of the monoclonal antibody in which the glycerol is present in an amount sufficient to increase the stability of the monoclonal antibody in the solution, and then determining the amount of tracer bound to the antibody by fluorescence polarization techniques as a measure of the amount of ligand in the sample.
Claim 2
Independent Claim 167 words
A method for determining ligands in a sample, characterized in that said method comprises mixing with the sample: (a) a tracer having the following formula where R is a ligand or analog thereof having at least one common epitope with a ligand to be determined so that the ligand to be determined and the ligand or analog thereof of the tracer are both specifically recognizable by a given antibody, and n is an integer from one to ten, or a biologically acceptable salt of such a tracer, (b) a monoclonal antibody which is capable of specifically recognizing both the ligand to be determined and the tracer, and (c) glycerol added as a part of a solution of the monoclonal antibody in which the glycerol is present in an amount sufficient to increase the stability of the monoclonal antibody in the solution, and then determining the amount of tracer bound to the antibody by fluorescence polarization techniques as a measure of the amount of ligand in the sample.
Claim 3
Dependent Claim 29 words
A method as claimed in claim 1 characterized in that the glycerol is present in the monoclonal antibody solution in an amount ranging from about 5% to about 20%.
Claim 4
Dependent Claim 31 words
A method as claimed in claim 1 characterized in that the glycerol constitutes about 10% of the monoclonal antibody solution that is added to the sample subjected to fluorescence polarization techniques.
Claim 5
Dependent Claim 15 words
A method as claimed in claim 1 characterized in that R has the following structure
Claim 6
Dependent Claim 29 words
A method as claimed in claim 4 characterized in that the glycerol is present in the monoclonal antibody solution in an amount ranging from about 5% to about 20%.
Claim 7
Dependent Claim 31 words
A method as claimed in claim 4 characterized in that the glycerol constitutes about 10% of the monoclonal antibody solution that is added to the sample subjected to fluorescence polarization techniques.
Claim 8
Dependent Claim 60 words
A buffered solution of a monoclonal antibody which is capable of specifically recognizing both a ligand to be determined and a tracer having the formula where R is a ligand or analog thereof, and n is an integer from 1 to 10, and an amount of glycerol sufficient to increase significantly the stability of the monoclonal antibody in the solution.
Claim 9
Dependent Claim 60 words
A buffered solution of a monoclonal antibody which is capable of specifically recognizing both a ligand to be determined and a tracer having the formula where R is a ligand or analog thereof, and n is an integer from 1 to 10, and an amount of glycerol sufficient to increase significantly the stability of the monoclonal antibody in the solution.
Claim 10
Dependent Claim 22 words
A solution as claimed in claim 7 characterized in that the glycerol constitutes from about 5% to about 20% of the solution.
Claim 11
Dependent Claim 22 words
A solution as claimed in claim 7 characterized in that the glycerol constitutes from about 8% to about 12% of the solution.
Claim 12
Dependent Claim 18 words
A solution as claimed in claim 7 characterized in that the glycerol constitutes about 10% of the solution.

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