137 results about "Immunologic assay" patented technology

Immunoassays and antibodies useful in conducting them for human and canine brain natriuretic peptide are described.

The present invention provides antibodies that have a surprisingly good combination of affinity for mesothelin and ability to be used in immunological assays for detecting the presence of mesothelin in biological samples. The invention further provides methods of using the antibodies, and kits comprising them. The antibodies can also be used to target toxins and other agents to cells expressing mesothelin, and can be used in methods and medicaments for inhibiting the growth of such cells.

According to the complement-dependent cytotoxicity (CDC) reaction principle in the immunology said invention creates an in-vitro enzyme-linked immunoreactino method for assaying HLA complement fixingantibodies (CFAbs) and its kit. The reaction system is formed from solid-phase HLA antigen or target cell with HLA antigen and liquid-phase enzyme-labelled ligand. CFAbs in the tested sample and solid-phase HLA antigen or HLA antigen of target cell are combined, and simultaneously fixed and existed in enzyme-labelled complement or the enzyme-labelled complement anti body is combined with complement fixed in HLA antigen-CFAb composite, then the correspondent enzyme substrate can be added to produce zymolygical color development reaction.

A prerequisite of proteomics is the ability to quantify many selected proteins simultaneously. Fluorescent sandwich immunoassays on microarrays hold appeal for such studies, since equipment and antibodies are readily available, and assays are simple, scalable and reproducible. To attain adequate sensitivity and specificity, however, a general method of immunoassay amplification is required. Coupling of isothermal rolling circle amplification (RCA) to universal antibodies can be used for this purpose: RCA on a synthetic DNA circle is initiated by a complementary oligonucleotide attached to an anti-biotin antibody; single-stranded RCA product remains attached to the antibody, and is detected by hybridization of complementary, fluorescent oligonucleotides. 51 cytokines were measured simultaneously on microarrays with signal amplification by RCA with high specificity, femtomolar sensitivity and 4 log quantitative range. This cytokine microarray was used to measure secretion from human Dendritic cells (DCs) induced by lipopolysaccharide (LPS) or tumor necrosis factor-alpha (TNF-(alpha). Rapid secretion of inflammatory cytokines such as MIP-1beta, IL-8, and IP-10 was induced by LPS. Eotaxin-2 and I-309 were found to be induced by LPS, and MDC, TARC, sIL-6R, and sTNF-RI were found to be induced by TNF-alpha. Since microarrays can accommodate ~1000 sandwich immunoassays of this type, a relatively small number of RCA microarrays appears to offer a tractable approach for proteomic surveys.

A microparticle immune chromatography of time-resolution fluorescence emulsion includes preparing biotinylation antibody and preparing immune time-resolution fluorescence microparticles, using Fusion 5 film to prepare avidin solid phase film detection line and quality control line by utilizing avidin to envelop said film, finally using double-antibody sandwich method to detect antigen quickly.

The invention relates to tumour marker proteins and their preparation from fluids from one or more cancer patients, wherein said fluids are those which collect in a body cavity or space which is naturally occurring or which is the result of cancer or medical intervention for cancer. The invention also relates to preparation of tumour marker proteins from excretions taken from patients with cancer. The tumour marker proteins are useful as immunoassay reagents in the detection of cancer-associated anti-tumour marker autoantibodies.

An in vitro diagnostic (IVD) device is used to detect the presence of and/or severity of neural injuries or neuronal disorders in a subject. The IVD device relies on an immunoassay which identifies biomarkers that are diagnostic of neural injury and/or neuronal disorders in a biological sample, such as whole blood, plasma, serum, and/or cerebrospinal fluid (CSF). An IVD device may measure one or more of several neural specific markers in a biological sample and output the results to a machine readable format, either to a display device or to a storage device internal or external to the IVD.

There is a demand for improved turbidimetric immunoassays for human Cystatin C in biological samples, especially in human clinical samples of body fluids. The present invention provides a turbidimetric immunoassay method and reagent set enabling measurement of human Cystatin C by turbidimetric methods, resulting in a surprisingly stronger and faster turbidimetric signal than in the present state of the art. The increased and faster signal is accomplished by the use of new reagents and compositions, and enables shorter assay times and kinetic reading with a stronger signal, improving overall assay speed and quality. Improved robustness to lipid interference and improved linearity is achieved.

The invention provides assay methods for the detection and quantitation of gastrin hormones, including total and free gastrin hormone in a sample. ELISA-type heterogeneous phase assays suitable for use with biological fluid samples such as blood, plasma or other bodily fluids of a mammal, particularly a human subject are provided. The method provides a precise assay for the amounts of free and total G17 and G34 in biological fluid samples, as well as the amounts of free and total Gly-extended G17, and Gly-extended G34. Also provided are methods of determining suitable treatment for patient suffering from a gastrin hormone-mediated disease or condition employing gastrin hormone immunoassays.

The present invention relates to a method for rapid immunochromatographic detection of a target in a sample by double sandwich immunoassay detection, wherein the target is an antibody and/or an antigen, using different colloidal gold conjugates conjugated with a first and a second specific antibody or antigen and with at least one oligonucleotide and its at least one complementary oligonucleotide and/or at least one non-specific antibody and its related non-specific antigen, to a rapid immunochromatographic detection device, to uses of the method for detecting diseases or specific conditions, and to a method for the manufacture of the device as well as to a kit which comprises the device.

The present invention discloses an enzyme association immunity test reagent kit and its operation instruction to test hepatitis B core antigen. Wherein, the reagent kit mainly comprises a monoclonal hepatitis B core antigen prepackaged micro-perforated plate, sample processing agent and polyclone hepatitis B core antigens marked with horse radish peroxidase. During operation, a sample to be tested is firstly preprocessed with the sample processing agent and then added into the monoclonal hepatitis B core antigen prepackaged micro-perforated plate. And then, polyclone hepatitis B core antigens marked with horse radish peroxidase and zymolytes are added to colorize. Stop solution is added to stop reaction and finally the measuring result is confirmed through color comparison. The present invention can detect hepatitis B core antigen in blood serum, ensure quite high conformance ratio in aspect of HBV-DNA detecting result, achieve requirements of clinical examination, have characteristics of convenience, sensitivity and stability, supplement conventional hepatitis B virus detecting method and bring better clinical operation.