Long lifetime anisotropy (polarization) probes for clinical chemistry, immunoassays, affinity assays and biomedical research
First Claim
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1. A method of conducting an assay of a sample of interest, comprising the steps of:
- coupling a luminescent asymmetric transition metal-ligand complex to an analyte in the sample of interest to form a coupled analyte, wherein the asymmetric transition metal-ligand complex-coupled analyte is capable of emitting polarized fluorescent light after being excited with linearly polarized electromagnetic light energy;
exciting the coupled analyte with linearly polarized electromagnetic light energy to cause the coupled analyte to emit polarized fluorescent light; and
measuring the polarization of the fluorescent light emission as a measure of a biological characteristic of the analyte in the sample of interest.
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Abstract
A method of conducting an immunoassay of a sample of interest is described, including the steps of (A) coupling a luminescent asymmetric metal-ligand complex to the sample of interest to form a coupled sample, (B) exciting the coupled sample with linearly polarized electromagnetic energy to cause the coupled sample to emit fluorescent light; and (C) measuring the polarization of the fluorescent emission as a measure of a biological characteristic of the sample of interest.
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Citations
30 Claims
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1. A method of conducting an assay of a sample of interest, comprising the steps of:
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coupling a luminescent asymmetric transition metal-ligand complex to an analyte in the sample of interest to form a coupled analyte, wherein the asymmetric transition metal-ligand complex-coupled analyte is capable of emitting polarized fluorescent light after being excited with linearly polarized electromagnetic light energy; exciting the coupled analyte with linearly polarized electromagnetic light energy to cause the coupled analyte to emit polarized fluorescent light; and measuring the polarization of the fluorescent light emission as a measure of a biological characteristic of the analyte in the sample of interest. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A fluorescence polarization assay for quantifying the amount of an analyte in a sample, comprising the steps of:
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(a) mixing (1) an asymmetric transition metal-ligand complex conjugated to a molecule which specifically binds said analyte with (2) said sample, wherein the asymmetric transition metal-ligand complex is capable of emitting polarized light after being excited with linearly polarized light; (b) exciting the mixture of step (a) with linearly polarized light to cause the complex to emit polarized light; (c) measuring the polarization of the light emitted by said complex; (d) calculating the amount of analyte in the sample by correlating the polarization measured in step (c) with the polarization of light emitted from a control sample containing a known amount of analyte. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A competitive fluorescence polarization assay for quantifying the amount of an analyte in a sample, comprising the steps of:
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(a) mixing (1) a control containing a known amount of analyte conjugated to an asymmetric transmission metal-ligand complex with (2) a molecule which specifically binds the analyte, wherein the asymmetric transition metal-ligand complex is capable of emitting polarized light after being excited with linearly polarized light; (b) exciting the mixture of step (a) with linearly polarized light to cause the complex to emit polarized light; (c) measuring the polarization of the light emitted by the complex; (d) adding the sample to the mixture to form a new mixture including analyte not conjugated which competes with the analyte conjugated to the asymmetric transition metal-ligand complex in binding to the molecule which specifically binds the analyte, thereby causing a change in polarization; (e) measuring the change in polarization; (f) calculating the amount of analyte in the sample by correlating the change in polarization with the control containing a known amount of analyte. - View Dependent Claims (22, 23, 24, 25, 26)
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27. A method of conducting an affinity polarization assay of a sample of interest to quantify the amount of an analyte in the sample, comprising the steps of:
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(a) mixing (1) a control containing a known amount of analyte conjugated to an asymmetric transition metal-ligand complex with (2) a molecule which has affinity for the analyte, wherein the asymmetric transition metal-ligand complex is capable of emitting polarized light after being excited with linearly polarized light; (b) exciting the mixture of step (a) with linearly polarized light to cause the complex to emit polarized light; (c) measuring the polarization of the light emitted by the complex; (d) adding the sample to the mixture to form a new mixture including analyte not conjugated which competes with the analyte conjugated to the asymmetric transition metal-ligand complex in associating with the molecule which has affinity for the analyte, thereby causing a change in polarization; (e) measuring the change in polarized emission; (f) calculating the amount of analyte in the sample by correlating the change in polarization with the control containing a known amount of analyte. - View Dependent Claims (28, 29, 30)
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Specification