Simultaneous Determination Of More Than One Analyte Patents (Class 435/973)
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Patent number: 7341837Abstract: The present invention relates to a method of detection of a compound of interest that is present at low levels in a sample. In particular, the present invention relates to a method of detection of a compound of interest in solution by a nucleic acid-labelled binding construct, separation of the unbound nucleic acid-labelled binding construct, and the detection of the bound nucleic acid-labelled binding construct in the solution phase. The present invention is particularly adaptable to be used in conjunction with a nucleic acid amplification reaction for detecting the presence or absence of the nucleic acid portion of binding construct in a sample indicating the presence or absence of the compound of interest.Type: GrantFiled: September 2, 2003Date of Patent: March 11, 2008Inventor: Robert L. Lawton
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Patent number: 7332329Abstract: A substrate for testing a carrier liquid for biomolecules using SPR or other techniques provides a metallic island surrounded by a hydrophobic layer, the islands being a location for the attachment of probe molecules. The hydrophobic layer may also be a dielectric material providing improved sensitivity in SPR imaging.Type: GrantFiled: September 21, 2005Date of Patent: February 19, 2008Assignee: Wisconsin Alumni Research FoundationInventors: Alastair William Wark, Hye Jin Lee, Robert Marcus Corn, Voula Kodoyianni
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Patent number: 7326578Abstract: It has been found that a urine test for ovarian reserve can be provided which is equivalent in sensitivity to current laboratory methods which determine ovarian reserve based on FSH levels in serum. A lateral flow device for indicating ovarian reserve is disclosed. The device has an application zone for receiving a urine sample, a labelling zone containing label which binds to FSH in the sample, and a detection zone where FSH-bound label is retained. The detection zone has a threshold value which corresponds to a serum FSII level of between 5-20 mIU/ml (e.g. 10 mIU/ml). A test result above the threshold value indicates diminished ovarian reserve.Type: GrantFiled: February 14, 2002Date of Patent: February 5, 2008Assignee: Genosis (UK) LimitedInventors: Paul North Bateman, Simon John Rattle
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Patent number: 7297312Abstract: A simultaneous multianalyte electrochemical assay includes a cell which has a surface and the surface includes analyte binding sites i.e., antibodies or antigens on a solid phase at distinct separate locations. Separate working electrodes are located within proximity to these separate locations. Enzyme labeled antibodies or antigens depending on the assay format are added and the enzyme reaction product measured, by simultaneous amperometric measurement with the independent electrode in each area. The electrodes are spatially separated from adjacent analytes so that a measurement can be taken before cross-interference due to diffusion of product from adjacent analyte areas.Type: GrantFiled: March 12, 1999Date of Patent: November 20, 2007Assignee: University of CincinnatiInventors: Ying Ding, Brian Halsall, William R. Heineman
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Patent number: 7297554Abstract: A competitive immunoassay, dye and method for rapidly detecting the presence of one or more target ligands within a fluid sample suspected of containing such ligand or ligands. The immunoassay comprises a protein-binding membrane, a first absorbent pad, a second absorbent pad, and a third absorbent pad. The protein-binding membrane has at least two regions of antibodies bound thereto for detecting dissimilar ligands. The second absorbent pad has formed therein a colloidal gold tracer having one, and preferably two or more ligand analog protein complexes adhering thereto. To utilize the system, the immunoassay strip is placed within a fluid sample. To the extent the target ligand is absent, a visual indicator will be provided signaling such absence. To the extent the target ligand is present at or above a threshold level, no such visual signal will be produced.Type: GrantFiled: October 28, 2003Date of Patent: November 20, 2007Assignee: Microdiagnostics, Inc.Inventors: Roy Chung, June Shozi
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Patent number: 7279287Abstract: The instant invention describes an analytical assay to accurately measure an analyte in the presence of an interfering substance.Type: GrantFiled: August 26, 2005Date of Patent: October 9, 2007Assignee: Genentech, Inc.Inventor: Peter Ralph
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Patent number: 7271009Abstract: Immunological assays for several biological markers for thyroid disorders in a biological sample are performed in a single test with a combination of sandwich-type, sequential competitive, and serological assays by the use of particles classified into groups that are distinguishable by flow cytometry, one group for the assay of each marker. Each group of particles is coated with a different immunological binding member, and coating densities, co-coating materials, and special buffer solutions are used to adjust for differences in the sensitivities and dynamic ranges of each of the markers in the typical sample.Type: GrantFiled: April 13, 2000Date of Patent: September 18, 2007Assignee: Bio-Rad Laboratories, Inc.Inventors: Michael I. Watkins, Suknan S. Chang, Renato B. Del Rosario, Patricia A. Miranda, Timothy D. Knight, Richard B. Edwards
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Patent number: 7267994Abstract: The present invention provides compositions and methods for detecting, analyzing, and identifying biomolecules. More particularly, the invention provides Element Coded Affinity Tags comprising a metal chelate and a metal ion and methods of using the tags to detect, analyze, and identify biomolecules including polypeptides, nucleic acids, lipids, and polysaccharides.Type: GrantFiled: May 24, 2004Date of Patent: September 11, 2007Assignee: Regents of the University of CaliforniaInventors: Claude F. Meares, Carlito B. Lebrilla, Nathaniel G. Butlin, Sarah M. Cheal, Todd M. Corneillie, Susan Lee, Paul A. Whetstone, Nicolas L. Young
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Patent number: 7247469Abstract: Arrays of protein-capture agents useful for the simultaneous detection of a plurality of proteins which are the expression products, or fragments thereof, of a cell or population of cells in an organism are provided. A variety of antibody arrays, in particular, are described. Methods of both making and using the arrays of protein-capture agents are also disclosed. The invention arrays are particularly useful for various proteomics applications including assessing patterns of protein expression and modification in cells.Type: GrantFiled: May 24, 2005Date of Patent: July 24, 2007Assignee: Zyomyx, Inc.Inventors: Peter Wagner, Peter Kernen, Hongbo Lu, Huu Tran
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Patent number: 7214545Abstract: The present invention provides compositions and methods for detecting, analyzing, and identifying biomolecules. More particularly, the invention provides Element Coded Affinity Tags comprising a metal chelate and a metal ion and methods of using the tags to detect, analyze, and identify biomolecules including polypeptides, nucleic acids, lipids, and polysaccharides.Type: GrantFiled: April 28, 2004Date of Patent: May 8, 2007Assignee: The Regents of the University of CaliforniaInventors: Claude F. Meares, Paul A. Whetstone, Todd M. Corneillie, Nathaniel G. Butlin
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Patent number: 7211441Abstract: A method of assaying to determine the identity and/or concentration or relative concentration in a sample solution of a particular one of a number of different target molecule types, comprise the steps of: i) adding to the sample a probe substance which binds to the or each target molecule type and which when so bound fluoresces under appropriate excitation; ii) performing a time-resolved fluorescence measurement on the sample; and iii) making said determination from analysis of the time decay data obtained from said time-resolved fluorescence measurement.Type: GrantFiled: January 17, 2001Date of Patent: May 1, 2007Assignee: Council for the Central Laboratory of the Research CouncilsInventors: Gennady Evgenievich Dobretsov, Tatiana Ivanovna Syrejshchikova, Nikolay Konstantinovich Kurek, David Clarke, Gareth Jones, Olga Polyannikova, legal representative, Boris Mordukhovich Krasovitsky, Mikhail Nikolaevich Yakimenko, deceased
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Patent number: 7205159Abstract: A method and apparatus for use in a flow through assay process is disclosed. The method is characterised by a “pre-incubation step” in which the sample which is to be analysed, (typically for the presence of a particular protein), and a detection analyte (typically an antibody bound to colloidal gold or a fluorescent tag) which is known to bind to the particular protein may bind together for a desired period of time. This pre incubation step occurs before the mixture of sample and detection analyte come into contact with a capture analyte bound to a membrane. The provision of the pre-incubation step has the effect of both improving the sensitivity of the assay and reducing the volume of sample required for an assay. An apparatus for carrying out the method is disclosed defining a pre-incubation chamber for receiving the sample and detection analyte having a base defined by a membrane and a second membrane to which a capture analyte is bound.Type: GrantFiled: August 20, 2002Date of Patent: April 17, 2007Assignee: Proteome Systems Intellectual Property Pty Ltd.Inventors: Robert Alan Cole, Andrew John Sloane, William Samuel Hunter
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Patent number: 7195923Abstract: The present invention provides methods for determining a ratio of an amount of a glycated form of a protein to a total amount of the protein in a sample containing the glycated protein, the glycosylated protein, or the glycoprotein. The method incorporates lateral flow test strip or vertical flow test strip devices having negatively charged carboxyl or carboxylate groups and hydroxyboryl groups immobilized and interspersed on a solid support matrix. The solid support matrix may include derivatives of cellulose (e.g., carboxy cellulose) derivatized with carboxylic acid (e.g., carboxylate, carboxyl) groups and hydroxyboryl compounds including phenylboronic acid (e.g., phenylborate), aminophenylboronic acid, boric acid (e.g., borate), or other boronic acid (e.g., boronate) compounds. The present invention is usefi.il for monitoring glycation or glycosylation of hemoglobin or albumin for monitoring glycemic control (e.g., glycemia in diabetes).Type: GrantFiled: January 31, 2002Date of Patent: March 27, 2007Assignee: Scripps Laboratories, Inc.Inventors: Ralph P. McCroskey, Cameron E. Melton
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Patent number: 7192786Abstract: This invention relates to a biospecific assay method, in which microparticles coated with the bioaffinity reactant A binding the analyte to be assayed; the sample to be analyzed, and the labelled bioaffinity reactant B are mixed. After the binding reaction the signal strength from the labelled bioaffinity reactant B bound to the microparticles is quantitated for the determination of the concentration of the analyte in the sample. According to the invention, such an amount of sample and microparticles is used in the assay that after binding of the analyte of the sample to the said amount of microparticles, each individual microparticle will emit such a signal strength as to allow the measurement of the analyte concentration over the whole range of typical analyte concentrations, and the signal strength from each microparticle is measured separately.Type: GrantFiled: June 7, 1995Date of Patent: March 20, 2007Assignee: Wallac OyInventors: Timo Nils-Erik Lövgren, Antti Juhana Iitiä, Kim Sverker Immanuel Pettersson
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Patent number: 7189516Abstract: The invention relates to methods of characterizing autoimmune diseases by detecting and measuring at least one analyte using multiplexed assay systems. According to one embodiment, a target is detected and measured by different bead sets having different reactants. According to another approach the ratio of self-antigen to autoantibody is measured by exposing a sample suspected of containing self-antigen and autoantibody to a bead set associated with monoclonal antibody specific for the self-antigen and a bead set associated with the self-antigen.Type: GrantFiled: August 19, 2002Date of Patent: March 13, 2007Assignee: Luminex CorporationInventors: James P. Mapes, James W. Jacobson, Harold N. Baker, Michael D. Spain
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Patent number: 7189515Abstract: The invention provides in vitro methods of detection using human antibodies. The methods are particularly useful for analyzing human samples containing HAMA or heterophilic antibodies. A human antibody can bind to an analyte in such samples without binding to HAMA or heterophilic antibodies present in the samples. The methods can be effected using a sandwich format among others.Type: GrantFiled: December 6, 2000Date of Patent: March 13, 2007Assignees: Biosite, Inc., Medarex, Inc.Inventors: Joe Buechler, Gunars Valkirs, Jeff Gray, Nils Lonberg
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Patent number: 7166469Abstract: A method having clinically sufficient degree of diagnostic accuracy for detecting the presence of coronary artery disease in a human patient from the general population and for distinguishing between the stages of the disease in that patient is disclosed. The stages are, first, the non-acute stage, which is either asymptomatic coronary artery disease or stable angina, second, the acute stage known as unstable angina, and, third, the acute stage known as acute myocardial infarction. The diseased state (as opposed to the non-diseased state) is indicated by the clinically significant presence of a first marker in a sample from the patient. The presence of one of the two acute stages, unstable angina or acute myocardial infarction, is indicated by the clinically significant presence of a second marker in a sample from the patient. The presence of the more severe acute stage known as acute myocardial infarction is indicated by the clinically significant presence of a third marker in a sample from the patient.Type: GrantFiled: June 18, 2002Date of Patent: January 23, 2007Assignee: Leuven Research & Development VZWInventors: Paul N. Holvoet, Désiré J. Collen
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Patent number: 7144705Abstract: Heart and brain fatty acid binding proteins (H-FABP, B-FABP) are markers for stroke. The invention provides a diagnostic assay for either of these markers, preferably by ELISA using anti-H-FABP or B-FABP antibody. Since H-FABP is also a marker for acute myocardial infarction (AMI), to distinguish stroke from AMI requires an assay specific to AMI, e.g. using troponin-I or creatine kinase-MB as a marker, also to be carried out.Type: GrantFiled: June 7, 2002Date of Patent: December 5, 2006Assignee: ElectroPhoretics LimitedInventors: Denis Francois Hochstrasser, Jean-Charles Sanchez, Catherine Gabrielle Zimmerman
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Patent number: 7144742Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: December 17, 2004Date of Patent: December 5, 2006Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan D. Pronovost
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Patent number: 7138237Abstract: The present invention provides a method of diagnosing Crohn's disease in a subject by determining the presence or absence of IgA anti-OmpC antibodies in the subject, where the presence of the IgA anti-OmpC antibodies indicates that the subject has Crohn's disease.Type: GrantFiled: May 19, 2000Date of Patent: November 21, 2006Assignees: Cedars-Sinai Medical Center, The Regents of the University of CaliforniaInventors: Stephan R. Targan, Jonathan Braun, Christopher L. Sutton
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Patent number: 7135329Abstract: An immunochemical assay device for determining the presence of NT-proBNP alone or conjunctively with Cardiac Troponin I comprising a base member, an array disposed on the base member, and at least one assay indicia zone. The array comprises (i) a reservoir pad to receive sample liquid, (ii) a wicking membrane, and (iii) at least one filter zone interposed between the wicking membrane and the reservoir pad. The filter zone being operable to permit passage of any specific immunocomplex to the wicking membrane while impeding passage of larger components.Type: GrantFiled: February 4, 2003Date of Patent: November 14, 2006Assignee: Princeton Biomeditech CorporationInventors: Jemo Kang, Kyung-ah Kim, Joo Young Choi, George Jackowski
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Patent number: 7125674Abstract: An improved apparatus for conducting a multiplicity of individual and simultaneous binding reactions is described. The apparatus comprises a substrate on which are located discrete and isolated sites for binding reactions. The apparatus is characterized by discrete and isolated regions that extend through a substrate and terminate on a second surface thereof, such that when a test sample is applied to the substrate, it is capable of penetrating through each such region during the course of the binding reaction. The apparatus is especially useful for sequencing by hybridization of DNA molecules.Type: GrantFiled: December 27, 2004Date of Patent: October 24, 2006Assignee: UT-Battelle, LLCInventor: Kenneth L. Beattie
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Patent number: 7112453Abstract: This invention provides methods of retentate chromatography for resolving analytes in a sample. The methods involve adsorbing the analytes to a substrate under a plurality of different selectivity conditions, and detecting the analytes retained on the substrate by desorption spectrometry. The methods are useful in biology and medicine, including clinical diagnostics and drug discovery.Type: GrantFiled: August 5, 2002Date of Patent: September 26, 2006Assignee: Ciphergen Biosystems, Inc.Inventors: T. William Hutchens, Tai-Tung Yip
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Patent number: 7109023Abstract: An immunochemical assay device for determining the presence of NT-proBNP alone or conjunctively with Cardiac Troponin I comprising a base member, an array disposed on the base member, and at least one assay indicia zone. The array comprises (i) a reservoir pad to receive sample liquid, (ii) a wicking membrane, and (iii) at least one filter zone interposed between the wicking membrane and the reservoir pad. The filter zone being operable to permit passage of any specific immunocomplex to the wicking membrane while impeding passage of larger components.Type: GrantFiled: November 18, 2002Date of Patent: September 19, 2006Assignee: Princeton BioMeditech CorporationInventors: Jemo Kang, Kyung-ah Kim, Joo Young Choi, George Jackowski
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Patent number: 7097974Abstract: A method for producing a support for determining analytes. The method comprises the steps of (a) providing a support comprising at least one channel, comprising a conduit having an intake and an outlet for passing fluid from the intake to the outlet, in the support body, (b) passing liquid with building blocks for synthesizing polymeric receptors through the channel or channels of the support body, (c) site- and/or time-specifically immobilizing the receptor building blocks in each case on predetermined positions in the channel or channels by illumination and (d) repeating steps (b) and (c) until the required receptors have been synthesized in each case on the predetermined positions.Type: GrantFiled: August 27, 1999Date of Patent: August 29, 2006Assignee: febit biotech GmbHInventors: Cord F. Stähler, Peer F. Stähler, Manfred Müller, Fritz Stähler, Hans Lindner
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Patent number: 7091046Abstract: A system for analyzing expression levels and activity of a plurality of proteins is provided. A bio-displayed polypeptide binding component associated with a predetermined marker is used to bind the proteins of interest. The predetermined marker components are then amplified and detected in a high throughput manner.Type: GrantFiled: December 11, 2001Date of Patent: August 15, 2006Assignee: HK Pharmaceuticals, Inc.Inventor: Joseph A. Monforte
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Patent number: 7070943Abstract: Methods, reagents, and kits are provided that permit flow cytometric determination of the phosphorylation status of retinoblastoma susceptibility gene protein (pRB) in individual cells. Methods are described that permit the hypophosphorylated, active, form of pRB to be measured either as an absolute quantity or as a proportion of total cellular pRB. Further described are methods that permit pRB phosphorylation status to be correlated with cell cycle phase and with protein components of the cell cycle. Screening of chemical compounds for antiproliferative and antineoplastic activity using the flow cytometric assays is demonstrated. Reagent kits that facilitate the subject methods are also provided.Type: GrantFiled: September 29, 2004Date of Patent: July 4, 2006Assignee: Becton Dickinson and CompanyInventors: Zbigniew Darzynkiewicz, Frank Traganos, Gloria Juan, Stefan Gruenwald
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Patent number: 7052831Abstract: The present invention provides a method and device for conducting a rapid in vitro enzyme immunoassay test for the direct and qualitative detection of two or more viral antigens from specimens of symptomatic patients. The method for immunoassay of viral antigens is performed on a membrane. Non-immunological capture of viral antigens takes place by absorption onto the membrane. Captured antigen binds to a detection reagent that includes a label conjugated to a specific antibody. The test is a differentiated test such that two or more viral antigens may be distinguished from each other in a single test. The invention also includes a kit for performing an assay in accordance with the method of the present invention, wherein the kit comprises the device of the present invention.Type: GrantFiled: December 8, 2000Date of Patent: May 30, 2006Assignee: Becton Dickinson and CompanyInventors: Robert C. Fletcher, Alvydas J. Ozinskas, Kenneth Kopher, John Gill
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Patent number: 7049151Abstract: A method and kit for simultaneous detection and/or determination of a plurality of modified proteins in a sample. The method comprises: a) contacting the sample under mild protein denaturation conditions with a plurality of first antibodies capable of binding to a specific target protein, the first antibodies being immobilized on solid support material, each first antibody being differentiable from others by a differentiation parameter, whereby the first antibodies bind to respective target proteins present in the sample; b) removing unbound materials from the locus of the first antibodies; c) contacting the materials from step (b) with one or more second antibodies, each of which is specific to a class or subclass of modified proteins or with a plurality of second antibodies, each of which is specific to a modified protein, so as to bind the second antibody or antibodies to modified proteins in the sample; and d) detecting and/or determining a plurality of modified proteins in the sample.Type: GrantFiled: March 6, 2002Date of Patent: May 23, 2006Assignee: Bio-Rad Laboratories, Inc.Inventors: Quan Nguyen, Yong Song
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Patent number: 7001775Abstract: A method and kit for screening a sample of body fluid for at least one autoantibody to at least one antigen. A source of at least one antigen to the autoantibody is provided. A substrate having immobilized thereto at least one antibody to the antigen is also provided. The antigen source is contacted with the sample of body fluid, so as to obtain a mixture wherein the antigen is allowed to substantially bind with the autoantibody, when the latter is present in the sample of body fluid. The mixture is allowed to flow relative to the substrate so as to allow the mixture to contact the antibody immobilized to the substrate. Labeling means are provided to permit monitoring of binding of the autoanitbody and the antigen present in the mixture, so as to provide an indication of the presence of the autoanitbody in the sample of body fluid.Type: GrantFiled: October 27, 1999Date of Patent: February 21, 2006Assignee: RSR LimitedInventors: Peter John Burne, Bernard Rees Smith
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Patent number: 7001776Abstract: This invention provides a novel device and method for preparing cytology slides. The device comprises a book-like form including an absorbent material and filter attached to the inside surface of a front cover and a cytology slide removeably attached to an inside surface of a back cover. A sample is removed from the body of a patient, placed in a liquid-based solution, and then on the filter. When the book-like form is closed, the sample is effectively transferred to the slide. The device can be modified so that a plurality of slides are prepared at the same time.Type: GrantFiled: April 4, 2001Date of Patent: February 21, 2006Assignee: Digene CorporationInventors: Gerson Botacini das Dores, Iwona Mielzynska-Lohnas, Eliane Taromaru, William J. Payne, Joseph P. Slattery, James G. Lazar
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Patent number: 6991907Abstract: Antibodies and methods are described for the detection and quantitation of cardiac specific troponin I in samples. Cardiac-specific troponin isoforms exist in various forms in the blood, including free and complexed forms. By selecting antibodies that are insensitive and/or sensitive to these various forms, the present invention can provide immunoassays that more accurately reflect the clinical state of an individual. These described antibodies and methods can be used for providing indicators of myocardial infarction and other cardiac pathologies.Type: GrantFiled: October 12, 2000Date of Patent: January 31, 2006Assignee: Biosite, Inc.Inventors: Kenneth F. Buechler, Paul H. McPherson
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Patent number: 6989276Abstract: A method is disclosed for analyzing a biological sample by antibody profiling for identifying forensic samples or for detecting the presence of an analyte. In an illustrative embodiment of the invention, the analyte is a drug, such as marijuana, cocaine, methamphetamine, methyltestosterone, or mesterolone. The method involves attaching antigens to the surface of a solid support in a preselected pattern to form an array wherein the locations of the antigens are known; contacting the array with the biological sample such that a portion of antibodies in the sample reacts with and binds to antigens in the array, thereby forming immune complexes; washing away antibodies that do form immune complexes; and detecting the immune complexes, thereby forming an antibody profile. Forensic samples are identified by comparing a sample from an unknown source with a sample from a known source.Type: GrantFiled: December 14, 2001Date of Patent: January 24, 2006Assignee: Battelle Energy Alliance, LLCInventors: Vicki S. Thompson, Karen B. Barrett, Diane E. Key
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Patent number: 6984494Abstract: The instant invention describes an analytical assay to accurately measure an analyte in the presence of an interfering substance.Type: GrantFiled: August 1, 2001Date of Patent: January 10, 2006Assignee: Genentech, Inc.Inventor: Peter Ralph
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Patent number: 6960478Abstract: Heterogeneous assays for different analytes in a single biological sample are performed simultaneously in a multiplexed assay that combines flow cytometry with the use of magnetic particles as the solid phase and yields an individual result for each analyte. The particles are distinguishable from each other by characteristics that permit them to be differentiated into groups, each group carrying an assay reagent bonded to the particle surface that is distinct from the assay reagents of particles in other groups. The magnetic particles facilitate separation of the solid and liquid phases, permitting the assays to be performed by automated equipment. Assays are also disclosed for the simultaneous detection of antibodies of different classes and a common antigen specificity or of a common class and different antigen specificities.Type: GrantFiled: December 11, 2003Date of Patent: November 1, 2005Assignee: Bio-Red Laboratories, Inc.Inventors: Michael I. Watkins, Richard B. Edwards
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Patent number: 6955889Abstract: Simultaneous forward and reverse blood group testing is described using both a visual detection system and a fluorescent based labeling and detection system. Forward and reverse tests could be performed separately, but A and B agglutinates can be detected and discriminated simultaneously.Type: GrantFiled: June 1, 2000Date of Patent: October 18, 2005Assignee: Ortho-Clinical Diagnostics, Inc.Inventors: Thomas J. Mercolino, Kathleen J. Reis
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Patent number: 6951716Abstract: Immunoassay methods and apparatus are provided which utilize flow cytometry, coated latex microspheres, and fluorochrome labeled antibodies, to simultaneously detect the presence and amount of one or more analytes in a sample. Beads of several different sizes, colors or shapes, each bead are coated with a different analyte, for the simultaneous detection of one or more analytes and of cell components. The invention is also directed to platelet Ig positive control reagents and assays which provide for the setting of the fluorescence positive region for each patient. The platelet control is sized to fit between the platelets and red cells and thus making it ideal as a true biological control.Type: GrantFiled: June 6, 2002Date of Patent: October 4, 2005Inventor: Mark Hechinger
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Patent number: 6939678Abstract: Assay systems and specialized antibodies for the detection and quantitation of troponin I and troponin T in body fluids as an indicator of myocardial infarction. Since troponin I and T exist in various conformations in the blood, the ratios of the monomeric troponin I an T and the binary and ternary complexes, as well as which form of troponin present in the blood, may be related to the metabolic state of the heart. Disclosed is a system to determine the presence of a troponin form or a group of troponin forms in a sample of whole blood, serum or plasma. Disclosed is a stabilized composition of troponin; the stabilized composition can comprise a stabilized composition of troponin I, wherein the troponin I is oxidized, the troponin I can be unbound or the troponin I can be in a complex. Disclosed is a method for improving the recovery of troponin I or T from a surface used in immunoassays.Type: GrantFiled: July 7, 1999Date of Patent: September 6, 2005Assignee: Biosite, Inc.Inventors: Kenneth F. Buechler, Paul H. McPherson
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Patent number: 6939720Abstract: A method for the multiplexed diagnostic and genetic analysis of enzymes, DNA fragments, antibodies, and other biomolecules comprises the steps of constructing an appropriately labeled beadset, exposing the beadset to a clinical sample, and analyzing the combined sample/beadset by flow cytometry. Flow cytometric measurements are used to classify, in real-time, beads within an exposed beadset and textual explanations, based on the accumulated data obtained during real-time analysis, are generated for the user. The inventive technology enables the simultaneous, and automated, detection and interpretation of multiple biomolecules or DNA sequences in real-time while also reducing the cost of performing diagnostic and genetic assays.Type: GrantFiled: December 27, 2002Date of Patent: September 6, 2005Assignee: Luminex CorporationInventors: Van S. Chandler, R. Jerrold Fulton, Mark B. Chandler
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Patent number: 6933106Abstract: Immunoassay methods and apparatus are provided which utilize flow cytometry, coated latex microspheres, and fluorochrome labeled antibodies, to simultaneously detect the presence and amount of one or more analytes in a sample. By combining FALS and fluorescence, it is practical to use beads of several different sizes, colors or shapes, each bead coated with a different analyte, for the simultaneous detection of one or more analytes and of cell components such as platelets in a sample.Type: GrantFiled: September 13, 2002Date of Patent: August 23, 2005Inventor: Mark Hechinger
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Patent number: 6924153Abstract: This invention provides solid phase specific binding lateral flow assay methods, devices and kits for quantitating high and low molecular weight analytes. The methods and devices of the invention employ labelled reagents which are either analyte analogs or complementary specific binding pair members for the analyte and a novel arrangement of capture zones comprising immobilized specific binding substances for either the analyte or the labelled reagent to effect bound from unbound labelled reagent as a function of analyte concentration. The capture zones are disposed on a non-bibulous matrix defining a flow path from a sample receiving zone to the capture zone. The devices of this invention also include multilane flow paths and multiple capture zones to quantitate analyte.Type: GrantFiled: March 6, 1997Date of Patent: August 2, 2005Assignee: Quidel CorporationInventors: Hans Boehringer, Gerald Rowley, Allan Pronovost
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Patent number: 6908770Abstract: A system for the rapid characterization of multi-analyte fluids, in one embodiment, includes a light source, a sensor array, and a detector. The sensor array is formed from a supporting member into which a plurality of cavities may be formed. A series of chemically sensitive particles are, in one embodiment positioned within the cavities. The particles may be configured to produce a signal when a receptor coupled to the particle interacts with the analyte. Using pattern recognition techniques, the analytes within a multi-analyte fluid may be characterized.Type: GrantFiled: April 7, 1999Date of Patent: June 21, 2005Assignee: Board of Regents, The University of Texas SystemInventors: John T. McDevitt, Eric V. Anslyn, Jason B. Shear, Dean P. Neikirk
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Patent number: 6893816Abstract: An improved microfabricated apparatus for conducting a multiplicity of individual and simultaneous binding reactions is described. The apparatus comprises a substrate on which are located discrete and isolated sites for binding reactions. The apparatus is characterized by discrete and isolated regions that extend through said substrate and terminate on a second surface thereof such that when a test sample is applied to the substrate, it is capable of penetrating through each such region during the course of said binding reaction. The apparatus is especially useful for sequencing by hybridization of DNA molecules.Type: GrantFiled: April 21, 1998Date of Patent: May 17, 2005Assignee: Houston Advanced Research CenterInventor: Kenneth L. Beattie
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Patent number: 6890729Abstract: This invention provides a novel device and method for preparing cytology slides. The device comprises a book-like form including an absorbent material and filter attached to the inside surface of a front cover and a cytology slide removeably attached to an inside surface of a back cover. A sample is removed from the body of a patient, placed in a liquid-based solution, and then on the filter. When the book-like form is closed, the sample is effectively transferred to the slide.Type: GrantFiled: May 22, 2002Date of Patent: May 10, 2005Assignee: Digene CorporationInventors: Iwona Mielzynska, Jay Payne, James Lazar
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Patent number: 6869770Abstract: Pregnancy-associated glycoproteins (PAGs) are structurally related to the pepsins, thought to be restricted to the hoofed (ungulate) mammals and characterized by being expressed specifically in the outer epithelial cell layer (chorion/trophectoderm) of the placenta. By cloning expressed genes from ovine and bovine placental cDNA libraries, the inventors estimate that cattle, sheep, and most probably all ruminant Artiodactyla, possess possibly 100 or more PAG genes, many of which are placentally expressed. The PAGs are highly diverse in sequence, with regions of hypervariability confined largely to surface-exposed loops. Selected PAG that are products of the iOnvasive binucleate cells, expressed highly in early pregnancy at the time of trophoblast invasion and expressed weakly, if at all, in late gestation are useful in the early diagnosis of pregnancy. In a preferred embodiment, the invention relates to immunoassays for detecting these PAGs.Type: GrantFiled: March 19, 1999Date of Patent: March 22, 2005Assignee: The Curators of the University of MissouriInventors: Robert Michael Roberts, Jonathan Andrew Green, Sancai Xie
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Patent number: 6849408Abstract: The present invention is directed to methods for analyzing one or more fluid samples for the presence, amount or identity of one or more analytes optionally present in said samples, which uses a device having one or more round wells with a fixed diameter, the wells exposing a substrate of a specific thickness, whereby the substrate has oriented through going channels, in the area of the substrate exposed in the well is provided with at least one binding substance specific for a least one of said analytes. Using the device the sample fluid is forced to pass through the channels in the substrate from the upper side of the substrate to the lower side of the substrate and back at least one time, under conditions that are favorable to a reaction between any analyte present in the sample and the binding substances.Type: GrantFiled: September 24, 2001Date of Patent: February 1, 2005Assignee: PamGene B.V.Inventors: Wilhemus M. Carpay, Roeland F. Papen
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Patent number: 6844200Abstract: Disclosed is an improvement to a dry assay device for determining the concentration of a first analyte in a sample of body fluid and a second analyte in the same sample of body fluid. The device involves the use of a strip of an absorbent material through which the sample of body fluid flows and wherein the first analyte is determined colorimetrically in a first region of the strip and the second analyte is determined by an immunoassay which takes place in a second region of the strip located downstream from the first region. The improvement involves placing the strip in a hollow casing having a top and a bottom and which is so constructed that when the top and bottom of the casing are mated there is formed a U shaped, body fluid impervious barrier around the first region of the strip to prevent the sample of body fluid from flowing in any direction other than in the direction of the second region of the strip.Type: GrantFiled: August 6, 2001Date of Patent: January 18, 2005Assignee: Bayer CorporationInventor: David A. Brock
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Patent number: 6825000Abstract: An immunoassay reagent is obtained whereby a microscale substance such as an antigen or antibody can be assayed at a high sensitivity, and whereby a need to separate a reacted substance, e.g., an immunoreacted substance, from an unreacted substance can be eliminated or such a separation can be simplified. An immunoassay reagent, for use in the quantitative determination of a target antigen or antibody present in a sample, containing an insoluble carrier which carries an enzyme and an antibody or antigen corresponding to the antigen or antibody, an enzyme inhibitor for inhibiting the activity of the enzyme and a substrate with which the enzyme reacts.Type: GrantFiled: October 31, 2000Date of Patent: November 30, 2004Assignee: Sekisui Chemical Co., Ltd.Inventors: Masayuki Yokoi, Takayuki Akamine, Katsumi Yoshikawa
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Patent number: 6815217Abstract: A solid phase with at least one test area is described which contains reagents for the detection of at least one analyte in a sample, wherein the solid phase additionally comprises at least one control area for the detection of interfering reactions.Type: GrantFiled: January 21, 2000Date of Patent: November 9, 2004Assignee: Roche Diagnostics GmbHInventors: Johann Karl, Helmut Lenz, Friedemann Krause, Peter Finckh, Hans Hornauer, Johann Berger
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Patent number: RE39816Abstract: A diagnostic tool is disclosed for accurately and rapidly diagnosing the condition of an ailing organ. Although applicable to numerous organ and organ systems, this application particularly illustrates the concept of conjunctive marker utilization as it relates to diagnosing and distinguishing congestive heart failure. The invention particularly relates to the conjunctive utilization of cardiac Troponin I (cTn-I) and natriuretic peptide, e.g. ANP, pro-ANP, BNP, pro-BNP and CNP as a retrospective tool for diagnosing the underlying mechanism of heart failure and as a prospective analytical device for monitoring disease progression and efficacy of therapeutic agents.Type: GrantFiled: April 29, 2005Date of Patent: September 4, 2007Assignee: Nanogen Inc.Inventors: Eric B. Stanton, George Jackowski