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Class 436/505 - B12 or folate


Subclass of Class 436 - Chemistry: analytical and immunological testing
Definition: Methods in which the substance tested for is vitamin B12
No. of patents: 77
Last issue date: 03/10/2009


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NumberTitleIssue Date
7501287Transcobalamin II assay method
An assay method for determining transcobalamin saturation wherein a transcobalamin containing liquid sample is contacted with a porous substrate with immobilized thereon a transcobalamin immobilizing ligand and with a reporter-labelled transcobalamin binding partner...
03/10/2009
7294514Diagnostic method for alzheimer's disease based on holo-transcobalamin II
The invention provides a diagnostic or prognostic assay method for Alzheimer's Disease by assaying a body fluid sample or a test sample derived therefrom for holo-trancobalamin II. ...
11/13/2007
7285418Method and kit for the diagnosis of troponin I
The invention provides a method for assaying for troponin I in a sample such as serum, the method comprising a determination of the troponin I concentration in a sample using a standard preparation that comprises a complete native troponin complex. One exemplary ass...
10/23/2007
7232805Cobalamin conjugates for anti-tumor therapy
The present invention provides a cobalamin-drug conjugate suitable for the treatment of tumor related diseases. Cobalamin is indirectly covalently bound to an anti-tumor drug via a cleavable linker and one or more optional spacers. Cobalamin is covalently bound to a...
06/19/2007
7148016Immunoassays to detect diseases or disease susceptibility traits
Disclosed are immunoassay methods for the diagnosis/prognosis of diseases and disease susceptibility traits associated with gene mutations that cause protein truncation or allelic loss. The levels of one or more targeted wild-type proteins expressed by a subject gen...
12/12/2006
7056747Process for removing endogenous Vitamin B12 and folate from albumin preparations
Processes for removing endogenous Vitamin B12 and folate are provided. The albumin preparations produced by the process are suitable for use as reference control samples in assays for determining these analytes in a test sample. Kits and methods related to the album...
06/06/2006
7005426Folic acid-polysaccharide complex, its preparation method and pharmaceutical composition containing the same as active component
The present invention relates to folic acid-polysaccharide complexs and method of preparation thereof, more particularly relates to folic acid-Dextran complexs, method of preparation thereof, pharmaceutical compositions having said complex as active component and us...
02/28/2006
6942977Immunoassays for determining vitamin b12, and reagents and kits therefor
Methods are described for the development of monoclonal antibodies to intrinsic factor and the application of said antibodies in the development of B12 immunoassays. In particular, antibodies are described that are capable of binding to intrinsic factor only in the ...
09/13/2005
6797521Fluorescent cobalamins and uses thereof
The present invention relates to fluorescent cobalamins and uses of these compounds. More particularly, this invention relates to fluorescent cobalamins that comprise a fluorescent, phosphorescent, luminescent or light-producing compound covalently linked to cobalam...
09/28/2004
6555388Binding protein capture assay
This invention relates to binding protein assays. In particular, this invention relates to binding protein assays for B12 and folate in serum or plasma. More specifically, this invention provides a sequential assay that uses a combination of specific bind...
04/29/2003
6083926Water soluble vitamin B12 receptor modulating agents and methods related thereto
Vitamin B12 receptor modulating agents capable of modulating cell surface receptors by affecting the cell surface receptor trafficking pathway are disclosed. The vitamin B12 receptor modulating agents are comprised of a covalently bo...
07/04/2000
6080549Methods and materials for the diagnosis and treatment of schizophrenia and related disorders
Methods for detecting schizophrenia or depression based on modifications of the contribution of the D4 receptor to phospholipid methylation levels are described herein. Individuals with schizophrenia or depression have a deficiency in phospholi...
06/27/2000
5861319Immobilization of specific binding assay reagents
Methods and compositions are provided for specific binding assays in which specific binding reagents are immobilized on a solid phase. Immobilization is facilitated by covalently coupling specific binding assay reagents such as polypeptide receptors or an...
01/19/1999
5589327Method and composition for the determination of red blood cell floate
A composition is described which is useful in the assay of folate from a hemolysate prepared from red blood cells using non-radiolabeled assay techniques such as fluorometric, colorimetric, enzymatic or chemiluminescent assay methods. Methods to ready hem...
12/31/1996
5538901Nucleophilic polysubstituted aryl acridinium ester conjugates uses thereof
This invention is directed to the novel assay methods utilizing nucleophilic polysubstituted aryl acridinium ester conjugates as the tracers. Conjugates prepared by covalent coupling of novel nucleophilic polysubstituted aryl acridinium esters with biolog...
07/23/1996
5506109Vitamin B12 assay
Immunoassays for vitamin B12 using novel monoclonal antibodies to the intrinsic factor:vitamin B12 complex and to the vitamin B12 binding site on intrinsic factor....
04/09/1996
5434087Folate immunoassay utilizing folate binding protein in a multiclonal antibody format
An improved method for performing immunoassays whereby specific binding proteins for vitamin B12, folate and other target analytes are utilized with antibodies with different specificities for the binding proteins. Antibodies bridge the specific binding p...
07/18/1995
5227311Intrinsic factor to determine B12
A method for purifying an aqueous intrinsic factor solution which contains R-protein is disclosed. The method involves adding to the intrinsic factor solution an amount of colloidal silica to disperse lipid emulsion, an amount of cobinamide sufficient to ...
07/13/1993
5187107B12 enzyme imunoassay and sample pretreatment
Denaturing agents used to pretreat test samples for immunoassays are neutralized and deactivated by the addition of a treatment agent which is a combination of a buffering agent in acid form and an agent for converting the sulfhydryl groups of the denatur...
02/16/1993
5104815Assay for cobalamins
The current invention is a method, kit and reagents for detecting cobalamins in a sample. The method involves introducing into the sample a first conjugate of a latex or latex-like solid phase linked to affinity purified intrinsic factor with a first link...
04/14/1992
5032503Liquid single reagent for air enzyme complementation assay
A method is provided for combining normally interacting reagents in a liquid single reagent and preventing complex formation using a surfactant and then reversing the inhibition by adding a cyclodextrin. The method finds particular use in diagnostic immun...
07/16/1991
5001072Compositions and methods for multiple simultaneous immunoradiometric assay (IRMA) of analytes using radioisotope chelate labels
Compositions and methods are disclosed for multiple simultaneous assays of different analytes using radioactive labeled antibodies to the analytes, at least one portion of the assay being an immunoradiometric assay in which there is employed a metal isoto...
03/19/1991
4950612Peroxy acid pretreatment in vitamin B12 assay
Serum samples for vitamin B12 analysis can be pretreated using a combination of peroxy acid and dithiothreitol. The pretreatment makes vitamin B12 bound to serum binding proteins available for analysis by any of a variety of currentl...
08/21/1990
4918005Method of quantitative assay for vitamin B12 and reagent for assaying vitamin B12
The present invention is directed to a method of quantitative assay for a vitamin B12 -containing substance which comprises culturing marine methanol-utilizing bacteria having B12 auxotrophy in a medium for quantitative assay of the ...
04/17/1990
4904583Cascade immunoassay by multiple binding reactions
A method for enzyme immunoassay includes contacting under binding conditions a liquid suspected of containing an analyte, an antianalyte affixed to a solid support and a tracer having an enzyme conjugated thereto. A bound fraction is separated from the li...
02/27/1990
4839299Assay for the free portion of substances in biological fluids
A biological sample containing an analyte, partly free and partly bound to natural binders, is incubated with a labelled specific binder for the analyte and a derivative of the analyte which does not react with the natural binders. Part of the labelled sp...
06/13/1989
4806493Stabilizers for use in serum folate assays
A serum folate assay wherein the serum folate is stabilized with dimercaptosuccinic acid or thioctic acid....
02/21/1989
4801530Nucleotide hybridization assay for protozoan parasites
The present invention provides a method for detection of protozoan parasites in blood or other specimen from their mammalian hosts. The method comprises nucleic acid hybridization of repetitive nuclear DNA fragments of the parasites. Hybridization probes ...
01/31/1989
4680273Assay for vitamin B12 deficiency
An assay for Vitamin B12 deficiency by determining for a blood sample that essentially all of the Vitamin B12 is carried by a combination of TCI and TCIII and/or essentially no Vitamin B12 is carried by TCII. TCII may be c...
07/14/1987
4672028Compositions and method for simultaneous multiple array of analytes using radioisotope chelate labels
Compounds useful in a simultaneous multiple assay for analytes such as steroids, proteins, peptides, carbohydrates or drugs. The compound or compounds are prepared by labelling an individual analyte with a radioisotope through a chelating agent to form a ...
06/09/1987
4474891Mini-iodinated polypeptide hormone tracer and method for its use
This invention relates to a highly-sensitive mini-iodinated radioactive hormone tracer which has both initial low iodine-to-hormone molar ratios and low specific activity. This invention also relates to methods for preparing and using such tracers in a ra...
10/02/1984
4465775Vitamin B12 and labelled derivatives for such assay
Vitamin B12 in liquid samples, such as human serum or human plasma, is assayed by a competitive binding technique using intrinsic factor and certain labelled vitamin B12 derivatives. The labelled derivatives are formed from the (d)-m...
08/14/1984
4465776Monoclonal antibodies to vitamin B6 and immunoassay method
A continuous hybridoma cell line which secretes recoverable quantities of monoclonal antibodies having specificity against Vitamin B6, which antibodies are useful in a method for detecting the presence of vitamin B6 in an animal samp...
08/14/1984
4456689Competitive protein binding assay using an organosilane-silica gel separation medium
An improved competitive protein binding assay comprising; incubating an analyte in the presence of labeled analyte and a protein binder suitable for competitive binding activity by the analyte and the labeled analyte to provide a mixture having free analy...
06/26/1984
4451571Preparation of samples for vitamin B12 and/or folate assay and assay
Vitamin B12 (cobalamin) and/or folate (folic acid) assay techniques can be simplified, by eliminating the step of heating or boiling the to-be-tested sample prior to its assay. This is accomplished by utilizing compositions and procedures: (1) ...
05/29/1984
4427780Method for assaying vitamin-containing compositions for vitamin analogues
Vitamin-containing multicomponent compositions are assayed to determine the extent of conversion of the vitamin to one or more analogues thereof due to interaction between the vitamin and the other components of the composition, employing a radioactive la...
01/24/1984
4426455Assay of vitamin B12
A method of assaying for vitamin B12 achieves denaturation of serum binding proteins which normally bind the vitamin B12 by treatment with alkali at ambient temperature. The assay is characterized by the use, in the alkali denaturation step, of a dithiopo...
01/17/1984
4423154Simultaneous radioassay of folate and vitamin B12
A serum sample is heated at an alkaline pH to release folate and vitamin B12 from endogenous binders. A simultaneous radioassay for folate and vitamin B12 is effected by contacting the sample with binder for folate, binder for vitami...
12/27/1983
4418151Assay process with non-boiling denaturation
Competitive protein binding radioassay for sera (or cell) vitamin B12 and/or serum folate (target components, or analytes) or other target components in liquid ambient utilizing a highly alkaline (pH 12-14) environment and reducing agent for de...
11/29/1983
4399228Polate competitive protein binding assay
Improvement in a competitive protein binding assay for N-5-methyltetrahydrofolic acid wherein any folate standard used is N-5-methyltetrahydrofolic acid complexed with folate binder protein. The protein of the complex is destroyed prior to the addition of...
08/16/1983
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