US5376556A
Expired / Lapsed
US
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Surface-enhanced Raman spectroscopy immunoassay
Assignee: Abbott Laboratories
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Filing: 1992-09-11
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Granted: 1994-12-27
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Expires: 2012-09-11
Abstract
Abstract A method, composition, device, apparatus, and kit for the determination of the presence or amount of an analyte by monitoring an analyte-mediated ligand binding event in a test mixture which contains the analyte to be assayed, a specific binding member, a Raman-active label, and a particulate having a surface capable of inducing a surface-enhanced Raman light scattering. The test mixture is illuminated with a radiation sufficient to cause the Raman-active label in the test mixture to emit a detectable Raman spectrum. The differences in the detected surface-enhanced Raman scattering spectra are dependent upon the amount of the analyte present in the test mixture. Thus, by monitoring these differences, the presence or amount of the analyte are determined.
Inventors
- 👤 Peter J. Tarcha
- 👤 Thomas E. Rohr
- 👤 James J. Markese
- 👤 Therese Cotton
- 👤 Bernard N. Rospendowski
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 11:09
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/53; G01N21/00; G01N21/62; G01N21/63; G01N21/65; G01N21/658; G01N33/543; G01N33/54366; G01N33/54373; G01N2021/653; Y; Y10; Y10S; Y10S435/00; Y10S435/968; Y10S436/00; Y10S436/801; Y10S436/805; Y10T; Y10T436/00; Y10T436/24
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
202 words
A method for determining the presence or amount of an analyte, if any, in a test sample by monitoring an analyte-mediated ligand binding event in a test mixture the method comprising: forming a test mixture comprising the test sample and a particulate capture reagent, said particulate capture reagent comprising a specific binding member attached to a particulate having a surface capable of inducing surface-enhanced Raman light scattering and also having attached thereto a Raman-active label wherein said specific binding member attached to the particulate is specific for the analyte, an analyte-analog or an ancillary binding member; providing a chromatographic material having a proximal end and a distal end, wherein the distal end of said chromatographic material comprises a capture reagent immobilized in a capture situs and capable of binding to the analyte; applying the test mixture onto the proximal end of said chromatographic material; allowing the test mixture to travel from the proximal end toward the distal end by capillary action; illuminating the capture situs with a radiation sufficient to cause a detectable Raman spectrum; and monitoring differences in spectral characteristics of the detected surface-enhanced Raman scattering spectra, the differences being dependent upon the amount of analyte present in the test mixture.
Claim 2
Independent Claim
202 words
A method for determining the presence or amount of an analyte, if any, in a test sample by monitoring an analyte-mediated ligand binding event in a test mixture the method comprising: forming a test mixture comprising the test sample and a particulate capture reagent, said particulate capture reagent comprising a specific binding member attached to a particulate having a surface capable of inducing surface-enhanced Raman light scattering and also having attached thereto a Raman-active label wherein said specific binding member attached to the particulate is specific for the analyte, an analyte-analog or an ancillary binding member; providing a chromatographic material having a proximal end and a distal end, wherein the distal end of said chromatographic material comprises a capture reagent immobilized in a capture situs and capable of binding to the analyte; applying the test mixture onto the proximal end of said chromatographic material; allowing the test mixture to travel from the proximal end toward the distal end by capillary action; illuminating the capture situs with a radiation sufficient to cause a detectable Raman spectrum; and monitoring differences in spectral characteristics of the detected surface-enhanced Raman scattering spectra, the differences being dependent upon the amount of analyte present in the test mixture.
Claim 3
Dependent Claim
15 words
The method according to claim 1 wherein the radiation causes a surface-enhanced resonance Raman scattering.
Claim 4
Dependent Claim
27 words
The method according to claim 1 further comprising adding an enhancer, selected from the group consisting of salt, buffer preparation, sugar and polymer, to the test mixture.
Claim 5
Independent Claim
202 words
A method for determining the presence or amount of an analyte, if any, in a test sample by monitoring an analyte-mediated ligand binding event in a test mixture, the method comprising: forming a test mixture comprising the test sample, an analyte-analog, and a particulate capture reagent comprising a specific binding member attached to a particulate having a surface capable of inducing surface-enhanced Raman light scattering and also attached thereto a Raman-active label wherein said specific binding member attached to the particulate is specific for the analyte, an analyte-analog or an ancillary binding member; providing a chromatographic material having a proximal end and a distal end, wherein the distal end of said chromatographic material contains a capture reagent immobilized in a capture situs and capable of binding to the analyte of the analyte-analog; applying the test mixture onto the proximal end of said chromatographic material; allowing the test mixture to travel from the proximal end toward the distal end by capillary action; illuminating the capture situs with a radiation sufficient to cause a detectable Raman spectrum; and monitoring differences in spectral characteristics of the surface-enhanced Raman scattering spectra, the differences being dependent upon the amount of the analyte present in the test mixture.
Claim 6
Independent Claim
202 words
A method for determining the presence or amount of an analyte, if any, in a test sample by monitoring an analyte-mediated ligand binding event in a test mixture, the method comprising: forming a test mixture comprising the test sample, an analyte-analog, and a particulate capture reagent comprising a specific binding member attached to a particulate having a surface capable of inducing surface-enhanced Raman light scattering and also attached thereto a Raman-active label wherein said specific binding member attached to the particulate is specific for the analyte, an analyte-analog or an ancillary binding member; providing a chromatographic material having a proximal end and a distal end, wherein the distal end of said chromatographic material contains a capture reagent immobilized in a capture situs and capable of binding to the analyte of the analyte-analog; applying the test mixture onto the proximal end of said chromatographic material; allowing the test mixture to travel from the proximal end toward the distal end by capillary action; illuminating the capture situs with a radiation sufficient to cause a detectable Raman spectrum; and monitoring differences in spectral characteristics of the surface-enhanced Raman scattering spectra, the differences being dependent upon the amount of the analyte present in the test mixture.
Claim 7
Dependent Claim
15 words
The method according to claim 4 wherein the radiation causes a surface-enhanced resonance Raman scattering.
Claim 8
Dependent Claim
27 words
The method according to claim 4 further comprising adding an enhancer, selected from the group consisting of salt, buffer preparation, sugar and polymer, to the test mixture.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-12-26 | 1998-06-27 | 1998-12-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-12-26 | 2002-06-27 | 2002-12-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-12-26 | 2006-06-27 | 2006-12-27 | $7700.00 | Window Closed / Lapsed |