CA2518356A1 - Assay system - Google Patents

Assay system Download PDF

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Publication number
CA2518356A1
CA2518356A1 CA002518356A CA2518356A CA2518356A1 CA 2518356 A1 CA2518356 A1 CA 2518356A1 CA 002518356 A CA002518356 A CA 002518356A CA 2518356 A CA2518356 A CA 2518356A CA 2518356 A1 CA2518356 A1 CA 2518356A1
Authority
CA
Canada
Prior art keywords
particles
conduit means
ligand
mass
complex
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002518356A
Other languages
French (fr)
Other versions
CA2518356C (en
Inventor
Steve J. Lackie
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sapidyne Instruments Inc
Original Assignee
Sapidyne Instruments Inc.
Steve J. Lackie
Sapidyne, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=25450611&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=CA2518356(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Sapidyne Instruments Inc., Steve J. Lackie, Sapidyne, Inc. filed Critical Sapidyne Instruments Inc.
Publication of CA2518356A1 publication Critical patent/CA2518356A1/en
Application granted granted Critical
Publication of CA2518356C publication Critical patent/CA2518356C/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/645—Specially adapted constructive features of fluorimeters
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/62—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light
    • G01N21/63—Systems in which the material investigated is excited whereby it emits light or causes a change in wavelength of the incident light optically excited
    • G01N21/64—Fluorescence; Phosphorescence
    • G01N21/6428—Measuring fluorescence of fluorescent products of reactions or of fluorochrome labelled reactive substances, e.g. measuring quenching effects, using measuring "optrodes"
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/75—Systems in which material is subjected to a chemical reaction, the progress or the result of the reaction being investigated
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/48—Biological material, e.g. blood, urine; Haemocytometers
    • G01N33/50—Chemical analysis of biological material, e.g. blood, urine; Testing involving biospecific ligand binding methods; Immunological testing
    • G01N33/53—Immunoassay; Biospecific binding assay; Materials therefor
    • G01N33/543—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals
    • G01N33/54313—Immunoassay; Biospecific binding assay; Materials therefor with an insoluble carrier for immobilising immunochemicals the carrier being characterised by its particulate form
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
    • G01N21/01—Arrangements or apparatus for facilitating the optical investigation
    • G01N21/03—Cuvette constructions
    • G01N21/0303—Optical path conditioning in cuvettes, e.g. windows; adapted optical elements or systems; path modifying or adjustment
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S435/00—Chemistry: molecular biology and microbiology
    • Y10S435/808—Optical sensing apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S436/00—Chemistry: analytical and immunological testing
    • Y10S436/805—Optical property

Abstract

An apparatus for assaying a fluid sample, said apparatus comprising, in combination: a hollow, light-transparent conduit means for allowing fluid flow therethrough;
and a porous mass of light-transparent material disposed in said conduit means, the porosity of said mass of transparent material being selected to permit fluid flow of said sample therethrough, said mass having immobilized on surfaces thereof at least a moiety of ligand/conjugate complex, said mass being arranged and constructed such that said moiety is localized within only a portion of said conduit means.

Claims (36)

1. An apparatus for assaying a fluid sample, said apparatus comprising, in combination:
a hollow, light-transparent conduit means for allowing fluid flow therethrough; and a porous mass of light-transparent material disposed in said conduit means, the porosity of said mass of transparent material being selected to permit fluid flow of said sample therethrough, said mass having immobilized on surfaces thereof at least a moiety of ligand/conjugate complex, said mass being arranged and constructed such that said moiety is localized within only a portion of said conduit means.
2. The apparatus of claim 1 including a fluid-porous barrier means disposed within said conduit means so as to define at least one wall of a chamber in said conduit means; and wherein said porous mass comprises a plurality of particles dimensioned within a specified range of diameters, the porosity of said barrier means being sufficiently smaller than said range so that said particles are trapped by said barrier means in said chamber to form said porous mass.
3. The apparatus of claim 2 wherein said barrier means comprises at least a pair of screens spaced apart from one another so as to define a reaction chamber within said conduit means, the mesh of said screens being sufficiently smaller than said range of diameters so that said particles are trapped by said screens in said chamber to form said porous mass, said particles having immobilized on the surfaces thereof at least a moiety of said ligand/conjugate complex.
4. The apparatus of claim 2 wherein said barrier means comprises a plurality of pairs of screens, the screen of each said pair being spaced apart from one another so as to define a respective reaction chamber within said conduit means;
each said chamber including a plurality of particles dimensioned within a specified range of diameters, the mesh of said screens being sufficiently smaller than said range of diameters so that said particles are trapped by said screens in each said chamber to form a respective porous mass, the particles of each said mass having immobilized on the surfaces thereof, at least a respective moiety of a distinct ligand/conjugate complex.
5. An apparatus for assaying a fluid sample, said apparatus comprising, in combination:
a focussing optical lens means; and a hollow, light-transparent conduit means of substantially uniform cross-sectional dimension disposed within said lens means for fluid flow therethrough and extending transversely to the optical axis of said lens means through the focal region of said lens means, said apparatus being arranged and constructed such that said lens means focuses light rays emanating from within said conduit means.
6. The apparatus of claim 5 wherein said lens means comprises a plurality of lenses and said conduit means extends through one of said lenses.
7. The apparatus of claim 6 including a porous mass of light-transparent material disposed in said conduit means, the porosity of said mass of transparent material being selected to permit flow of said fluid sample therethrough, said mass having immobilized on the surfaces thereof, at least a moiety of a ligand/conjugate complex.
8. The apparatus of claim 5 including a mechanical, fluid-porous barrier means dimensioned and disposed adjacent to said focal region so as to block flow of particulates of predetermined size through said conduit means.
9. The apparatus of claim 6 including a first elongated hemi-tubular channel in said one of said lenses and a second elongated hemi-tubular channel, said channels being mateable with one another to define said conduit means.
10. The apparatus of claim 9 wherein said second hemi-tubular channel has a light reflective surface on the concave portion thereof.
11. The apparatus of claim 9 wherein one elongated edge of said first channel is hingedly connected to an elongated edge of said second channel.
12. The apparatus of claim 8 wherein said hollow conduit means comprises a cylindrical passage having a light-transparent tube positioned within said cylindrical passage, said barrier means being disposed in said tube.
13. The apparatus of claim 12 wherein said barrier means comprises a pair of screens spaced apart from one another so as to define a reaction chamber within said tube; and including a plurality of particles dimensioned within a specified range of diameters, the mesh of said screens being sufficiently smaller than said range of diameters so that said particles are trapped by said screens in said reaction chamber to form a porous mass positionable substantially at said focal region.
14. The apparatus of claim 12 wherein the indices of refraction of said lens means and said tube are substantially matched.
15. The apparatus of claim 14 including a refractive index-matching fluid disposed around said tube and in the interspace between said tube and said passage.
16. The apparatus of claim 7 wherein one portion of said conduit means is formed as an elongated hemi-tubular first channel in said lens means and the remaining portion of said conduit means is formed as an elongated hemi-tubular second channel, matched to said first channel.
17. The apparatus of claim 16 wherein said second channel has a reflective surface forming at least a part of the inner surface of said conduit means.
18. The apparatus of claim 8 including a plurality of particles dimensioned within a specified range of diameters, said fluid-porous means having pores of lesser diameter than said range of diameters so that said particles are accreted in said conduit means against said barrier means to form a porous mass disposed substantially at said focal region.
19. The apparatus of claim 18 wherein said particles are substantially transparent to light.
20. The apparatus of claim 19 wherein said particles are coated on at least a portion of the surface thereof with at least a moiety of a ligand/conjugate complex.
21. An apparatus for assaying a fluid sample using a tag that emits electromagnetic radiation when excited, said apparatus comprising:
a lens means that focuses said radiation, said lens means having a conduit means therein extending transversely of the optical axis of said lens means through the focal region of said lens means, said conduit means allowing fluid flow therethrough; and a fluid-porous barrier means disposed adjacent said focal region in said conduit means for limiting the passage of particles through said porous means as a function of particle size.
22. The apparatus of claim 21 including means for exciting emission of said electromagnetic radiation.
23. The apparatus of claim 22 wherein said means for exciting said emission comprises a source of excitation radiation and means for directing said excitation radiation at said conduit means at said focal region.
24. The apparatus of claim 23 wherein said emission is fluorescent radiation.
25. The apparatus of claim 23 including a plurality of particles dimensioned within a specified range of diameters, said fluid-porous barrier means having pores of lesser diameter than said range of diameters so that said particles are accreted in said conduit means against said fluid-porous barrier means to form a porous mass disposed substantially at said focal region.
26. The apparatus of claim 25 wherein said particles are substantially transparent to both said excitation radiation and said fluorescent radiation, and are coated with immobilized specific binding ligand.
27. The apparatus of claim 26 wherein said ligand has formed a complex in a ligand/conjugate reaction, said complex being tagged with molecules that fluoresce when excited by appropriate excitation radiation.
28. A method of assaying a fluid sample by measuring radiation emitted from a ligand/conjugate complex, said method comprising the steps of:
providing a plurality of particles dimensioned within a specified range of diameters;
flowing a suspension of said particles through conduit means extending transversely of the optical axis of lens means through the focal region of said lens means;
arresting the flow of said particles through said conduit means by porous barrier means having pores of lesser diameter than said range of diameters, so that said particles accrete substantially at said focal region;
treating said accretion of particles, including flowing at least said fluid sample therethrough, so as to create said ligand/conjugate complex on the surfaces of said particles;
stimulating said complex so that characteristic radiation arises therefrom;
focussing said characteristic radiation transmitted by said lens means;
and measuring emission of said characteristic radiation transmitted by said lens means.
29. The method of claim 28 wherein said treating includes coating said particles at least on a portion of the surface thereof with at least a moiety of said complex;

tagging said complex with a fluorescent label; and flowing through said conduit means and said accretion of said particles a wash fluid to separate unreacted conjugate and fluorescent label from the tagged complex.
30. The method of claim 28 wherein said stimulating includes directing excitation radiation onto said tagged complex; and said characteristic radiation comprises fluorescence arising from the excited tagged complex and passing through said lens means.
31. The apparatus of claim 1, wherein said at least a moiety of a ligand/conjugate complex comprises a plurality of distinct moieties.
32. The apparatus of claim 31, wherein each moiety of said plurality of distinct moieties is localized within a distinct portion of said conduit means.
33. The apparatus of claim 5, including a quantitative detection system positioned relative to said conduit means so that said system quantifies electromagnetic radiation emanating from within a portion of the conduit means.
34. The apparatus of claim 22 wherein said means for exciting said emission comprises chemiluminescent agents.
35. A method of assaying a fluid sample by measuring radiation emitted from a ligand/conjugate complex, said method comprising the steps of:
providing a hollow, light-transparent tube containing a pair of screens spaced apart from one another so as to define a reaction chamber within said tube, and a porous mass of particles disposed within said reaction chamber, said particles being dimensioned within a specified range of diameters, the mesh of said screens being sufficiently smaller than said range of diameters so that said particles are trapped by said screens;

providing lens means having a cylindrical passage extending therethrough transversely of an optical axis of said lens means through a focal region of said lens means;
inserting said tube into said cylindrical passage so that said reaction chamber lies within said focal region;
treating said porous mass of particles, including flowing at least said fluid sample therethrough, so as to create said ligand/conjugate complex on the surfaces of said particles;
stimulating said complex so that characteristic radiation arises therefrom; and measuring emission of said characteristic radiation transmitted from said reaction chamber by said lens means.
36. A method of assaying a fluid sample by measuring radiation emitted from a ligand/conjugate complex, said method comprising the steps of:
providing a hollow, light-transparent conduit means containing a porous mass of light-transparent material disposed in said conduit means, the porosity of said mass of transparent material being selected to permit fluid flow of said sample therethrough, said porous mass having immobilized on surfaces thereof at least a moiety of said ligand/conjugate complex, said mass being arranged and constructed such that said moiety is localized within only a portion of said conduit means;
treating said porous mass, including flowing at least said fluid sample therethrough, so as to allow formation of said ligand/conjugate complex on said surfaces of said porous mass within said portion of said conduit means;
stimulating said complex so that characteristic radiation arises therefrom; and quantitatively measuring said characteristic radiation emanating from within said portion of said conduit means.
CA002518356A 1992-08-03 1993-07-23 Assay system Expired - Lifetime CA2518356C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US07/924,720 1992-08-03
US07/924,720 US5372783A (en) 1992-08-03 1992-08-03 Assay system
CA002120481A CA2120481C (en) 1992-08-03 1993-07-23 Assay system

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA002120481A Division CA2120481C (en) 1992-08-03 1993-07-23 Assay system

Publications (2)

Publication Number Publication Date
CA2518356A1 true CA2518356A1 (en) 1994-02-17
CA2518356C CA2518356C (en) 2009-11-24

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CA002518356A Expired - Lifetime CA2518356C (en) 1992-08-03 1993-07-23 Assay system
CA002120481A Expired - Lifetime CA2120481C (en) 1992-08-03 1993-07-23 Assay system

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US (3) US5372783A (en)
EP (1) EP0606460B1 (en)
JP (4) JP3534756B2 (en)
AT (1) ATE242996T1 (en)
CA (2) CA2518356C (en)
DE (1) DE69333050T2 (en)
DK (1) DK0606460T3 (en)
WO (1) WO1994003104A1 (en)

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JP2005321416A (en) 2005-11-17
JP3534756B2 (en) 2004-06-07
ATE242996T1 (en) 2003-07-15
US6120734A (en) 2000-09-19
EP0606460B1 (en) 2003-06-18
JP2006258824A (en) 2006-09-28
US5554340A (en) 1996-09-10
JP4102837B2 (en) 2008-06-18
CA2518356C (en) 2009-11-24
JPH07500191A (en) 1995-01-05
CA2120481C (en) 2005-12-20
DE69333050T2 (en) 2004-05-27
EP0606460A4 (en) 1994-12-07
CA2120481A1 (en) 1994-02-17
JP2004069716A (en) 2004-03-04
EP0606460A1 (en) 1994-07-20
US5372783A (en) 1994-12-13
WO1994003104A1 (en) 1994-02-17
DK0606460T3 (en) 2003-10-13
DE69333050D1 (en) 2003-07-24

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