Flow cytometric measurement of total DNA and incorporated halodeoxyuridine
First Claim
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1. A method for the simultaneous measurement of total cellular DNA content and of incorporated halodeoxyuridine comprising:
- reacting cells with radioactive labeled halodeoxyuridine;
denaturing cellular DNA with a denaturing agent;
adding to the reaction medium monoclonal antibodies reactive with halodeoxyuridine;
reacting the bound monoclonal antibodies with a labeled second antibody;
incubating the mixture with a DNA stain; and
measuring simultaneously the intensity of the DNA stain as a measure of the total cellular DNA and the halodeoxyuridine incorporated as a measure of DNA synthesis.
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Abstract
A method for the simultaneous flow cytometric measurement of the total DNA content and the level of DNA synthesis in normal and malignant cells is disclosed. The sensitivity of the method allows a study of cell cycle traverse rates for large scale cell populations as well as single cell measurements. A DNA stain such as propidium iodide is used as the probe for the measurement of total DNA content and a monoclonal antibody reactive with a DNA precursor such as bromodeoxyuridine (BrdU) is used as a probe for the measurement of BrdU uptake by the cells as a measure of DNA synthesis.
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Citations
23 Claims
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1. A method for the simultaneous measurement of total cellular DNA content and of incorporated halodeoxyuridine comprising:
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reacting cells with radioactive labeled halodeoxyuridine; denaturing cellular DNA with a denaturing agent; adding to the reaction medium monoclonal antibodies reactive with halodeoxyuridine; reacting the bound monoclonal antibodies with a labeled second antibody; incubating the mixture with a DNA stain; and measuring simultaneously the intensity of the DNA stain as a measure of the total cellular DNA and the halodeoxyuridine incorporated as a measure of DNA synthesis. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 18)
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10. A method for the bivariate analysis of cell cycle phase distribution of cellular DNA content comprising:
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labeling cells with radioactive nuclide labeled halodeoxyuridine; denaturing the cellular DNA; reacting said cells with monoclonal antibodies produced by hybridoma identified as HB-8320 or HB-8321; incubating the cells with a second antibody conjugated to a label; incubating the cells with propidium iodide; measuring simultaneously the bound halodeoxyuridine label and the bound propidium iodide cytometrically or spectrophotometrically as a measure of the incorporated halodeoxyuridine and of the total DNA in said cells. - View Dependent Claims (11, 19)
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12. A method for the bivariate analysis of cell cycle traverse comprising:
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labeling cells with radioactively labeled halodeoxyuridine; denaturing the cellular DNA with a denaturing agent; reacting said cells with monoclonal antibodies produced by hybridoma identified as HB-8320 or HB-8321; incubating the cells with a second antibody conjugated to a label; incubating the cells with propidium iodide; measuring simultaneously at specified time intervals the bound halodeoxyuridine label and the bound propidium iodide cytometrically or spectrophotometrically as a measure of the incorporated halodeoxyuridine and of the total DNA in said cells; and measuring the bivariate distribution of total DNA and bound halodeoxyuridine through the various phases of the cell cycle. - View Dependent Claims (13)
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14. A method for the measurement of DNA synthesis following drug treatment comprising:
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treating mice with araC; administering to said araC-treated mice halodeoxyuridine; reacting said cells with monoclonal antibodies produced by hybridoma identified as HB-8320 or HB-8321; incubating the cells with a second antibody conjugated to a label; incubating the cells with propidium iodide; measuring simultaneously at specified time intervals the bound halodeoxyuridine label and the bound propidium iodide cytometrically or spectrophotometrically as a measure of the incorporated halodeoxyuridine and of the total DNA in said cells; and measuring the bivariate distribution of total DNA and bound halodeoxyuridine through the various phases of the cell cycle. - View Dependent Claims (15, 16, 17)
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20. A method for the bivariate analysis of cell cycle phase distribution of cellular DNA content comprising:
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labeling cells with radioactively labeled halodeoxyuridine; denaturing the cellular DNA; reacting said cells with monoclonal antibodies produced by hybridoma identified as HB-8320 or HB-8321; incubating the cells with a second antibody conjugated to a label; incubating the cells with a DNA stain; measuring simultaneously the bound halodeoxyuridine label and the bound DNA stain cytometrically or spectrophotometrically as a measure of the incorporated halodeoxyuridine and of the total DNA in said cells; and measuring the bivariate distribution of total DNA and bound halodeoxyuridine through the various phases of the cell cycle. - View Dependent Claims (21)
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22. A method for the bivariate analysis of cell cycle traverse comprising:
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labeling cells with tritiated halodeoxyuridine; denaturing the cellular DNA with a denaturing agent; reacting said cells with monoclonal antibodies produced by hybridoma identified as HB-8320 or HB-8321; incubating the cells with a second antibody conjugated to a label; incubating the cells with a suitable DNA stain; measuring simultaneously at specified time intervals the bound halodeoxyuridine label and the bound DNA stain cytometrically or spectrophotometrically as a measure of the incorporated halodeoxyuridine and of the total DNA in said cells; and measuring the bivariate distribution of total DNA and bound halodeoxyuridine through the various phases of the cell cycle. - View Dependent Claims (23)
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Specification