553 results about "Bioassay" patented technology

The present invention relates, in general, to a prostate-specific antigen, PCA3. In particular, the present invention relates to nucleic acid molecules coding for the PCA3 protein; purified PCA3 proteins and polypeptides; recombinant nucleic acid molecules; cells containing the recombinant nucleic acid molecules; antibodies having binding affinity specifically to PCA3 proteins and polypeptides; hybridomas containing the antibodies; nucleic acid probes for the detection of nucleic acids encoding PCA3 proteins; a method of detecting nucleic acids encoding PCA3 proteins or polypeptides in a sample; kits containing nucleic acid probes or antibodies; bioassays using the nucleic acid sequence, protein or antibodies of this invention to diagnose, assess, or prognose a mammal afflicted with prostate cancer; therapeutic uses; and methods of preventing prostate cancer in an animal.

Methods for manipulating carbohydrate processing pathways in cells of interest are provided. Methods are directed at manipulating multiple pathways involved with the sialylation reaction by using recombinant DNA technology and substrate feeding approaches to enable the production of sialylated glycoproteins in cells of interest. These carbohydrate engineering efforts encompass the implementation of new carbohydrate bioassays, the examination of a selection of insect cell lines and the use of bioinformatics to identify gene sequences for critical processing enzymes. The compositions comprise cells of interest producing sialylated glycoproteins. The methods and compositions are useful for heterologous expression of glycoproteins.

Disclosed is an improvement in methods for nucleic acid and immunological bioassays. The methods comprise a step for “sweeping” paramagnetic bead: target molecule complexes so as to capture them with an affinity capture agent on a test pad by moving a magnetic force field from outside to inside the test pad area so as to bring into contact the paramagnetic complexes with the capture agent, while sweeping any unbound paramagnetic material off the test pad by moving the magnetic field from inside to outside the test pad area. Surprisingly, the paramagnetic complexes are rapidly affinity-extracted from the moving magnetic field.

Microparticles including spatially coded microparticles, systems for imaging and methods of detecting such microparticles as well as using the same in bioassays are provided.

A methodology for bioassays and diagnostics in which a particulate label (ranging in size from nm-scale molecular assemblages to organisms on the scale of tens or hundreds of microns), such as, but not limited to, nanoparticles, bacteria, bacteriophage, Daphnia, and magnetic particles, serve carriers for analytes bound by molecular recognition elements such as antibodies, aptamers, etc. The described methodology is generally applicable to most pathogen assays and molecular diagnostics and also leads to enhanced sensitivity and convenience of use.

A micro bead having a digitally coded structure that is partially transmissive and opaque to light. The pattern of transmitted light is determined by to decode the bead. The coded bead may be structured a series of alternating light transmissive and opaque sections, with relative positions, widths and spacing resembling a 1D or 2D bar code image. To decode the image, the alternating transmissive and opaque sections of the body are scanned in analogous fashion to bar code scanning. The coded bead may be coated or immobilized with a capture or probe to effect a desired bioassay. The coded bead may include a paramagnetic material. A bioanalysis system conducts high throughput bioanalysis using the coded bead, including a reaction detection zone and a decoding zone.

The present invention relates to luminescent inorganic nanoparticles comprising (a) a core made from a first metal salt or oxide being surrounded by (b) a shell made from a second metal salt or oxide being luminescent and having non-semiconductor properties. These particles can be advantageously used in (fluorescence) resonance energy transfer ((F)RET)-based bioassays in view of their higher (F)RET efficiency.

The invention is a biometric system based on iris texture analysis, which overcomes the defects in the prior art that lack the support of iris image quality analysis mechanism and cannot complete the evaluation of iris texture image quality. The invention acquires iris texture images, automatically locates iris, evaluates and analyzes the quality of iris texture images, automatically tracks and detects living iris, standardizes polar coordinate transformation of iris analysis area, demodulates and expresses iris texture features, and generates feature code IrisID by quantization coding. Encoding IrisID similarity measurement, similarity measurement judgment and other steps are realized. The invention realizes the basic characteristic requirements of an ideal system: automaticity, non-invasiveness, friendly man-machine operation interface and high-quality imaging image; no correlation between geometric affine transformation and nonlinear affine deformation; no dependence on external imaging conditions ; Random probability distribution coding; High-precision false acceptance rate and false rejection rate performance.

The present invention relates to detecting and/or measuring scattering effects due to the aggregating metallic nanostructures or the interaction of plasmonic emissions from approaching metallic nanoparticles. The scattering effects may be measured at different angles, different wavelengths, changes in absorption and/or changes in polarization relative to changes in the distances between nanoparticles.

A preparation method and application of a molecular imprinted polymer on the silica surface for specifically adsorbing patulin belong to the technical field of bioassay. The method comprises the following steps: firstly pretreating the silica surface; siliconizing the silica surface to prepare APTS-silica and introducing amino groups; preparing ACPA-silica by dewatering and esterifying or an acyl chloride intermediate method and grafting an azo initiator on the silica surface; and finally taking the patulin analog 2-hydroxynicotinic acid as a template to replace molecules, taking acrylamide, methylacrylic acid, 4-vinyl pyridine and trifluoromethyl acrylic acid as the functional monomers and taking ethylene glycol dimethacrylate (EDMA) as a cross-linking agent to obtain the molecular imprinted polymer on the silica surface in acetonitrile and pyridine solvents by thermal initiation. The invention has the following advantages: as the pretreatment method for liquid chromatography of trace patulin in apple juice and related products, the polymer prepared by the invention can specifically adsorb the enriched patulin, the sample is simply and quickly treated and can be reused multiple times, and the polymer is resistant to acid and alkali treatment and is preserved under normal temperature, at the same time, the invention avoids the recovery loss caused by the traditional steps of removing impurities by alkaline washing by liquid-liquid extraction and removing organic solvents by rotary evaporation and reduces the usage amount of the organic solvents.

Disclosed are methods and systems for screening for compounds that act to modulate insect growth. Bioassays including cell culture and/or transgenic insects engineered with various components of the ecdysoid receptor (EcR) and/or the farsenoid-X receptor (RXR) systems to identify compounds that act as insecticides and/or hormone receptor activators are described. Also described are compounds, and compositions, identified as being putative insecticides based upon their ability to activate EcR and/or FXR mediated transcription.

A Light Transmitted Assay Beads or digital magnetic microbead having a digitally coded structure that is partially transmissive and opaque to light. When hundreds or thousands of LITAB are settled down to the bottom of a microwell in a microplate or a planar surface, the barcode can be decoded by image processed accurately and reliable. Microplate is a standard bioassay format; each plate can have 96, 384, or 1536 patient samples. Therefore, a large number of targets in a sample can be analyzed in one single microwell. The image decoding algorithms comprise of four main processes (1) enhancement of image (2) segmentation of beads (3) extraction of barcode slits, and (4) decoding of barcodes. The bead image is taken from the bottom of an optically clear microplate, and barcode pattern can be decoded by image software. Therefore, the whole bead bioassay experiment can be performed in the microplate without taking the beads out.

The invention provides high sensitivity bioassay sensor systems in which non-specific adsorption of impurities such as, for example, proteins, in biological samples is inhibited. Polyethylene glycolated particles enclosing metal or semi-conductor which is in common with the sensor material are used for amplification.

This invention provides for a chamber and system designed for use in assaying drug effects on heart rate. The chamber consists of a series of wells, each 3 mm by 3 mm in inner diameter. Cardiac myocytes disaggregated from neonatal animals are plated onto the bottom of each well and grown under standard tissue culture conditions. The chamber holds from 24-96 such wells. When drugs are to be assayed, the cells in each well are loaded with a calcium sensitive dye and the beating rate in each is monitored with a photodiode. Drug is added in graded concentrations to each well, and equilibrated and effects on rate are observed. This construct permits use of a cell based bioassay for the study of drugs or agents that may alter cardiac rate. This invention can be used in high throughput screening of drugs to evaluate/predict their effects on cardiac rate and rhythm. Further provided for by this invention is a A vector which comprises a compound which encode an ion channel.

In alternative embodiments, the invention provides high throughput, multiplexed systems or methods for detecting a biological, a physiological or a pathological maker, or a single molecule or a single cell using a droplet microfluidics system integrated with use of a sensor or a sensing system, an aptamer, or a DNAzyme. In alternative embodiments, the sensor or sensing system comprises a nucleic acid based, an antibody based, an enzyme based or a chemical based sensor or sensing system. In alternative embodiments, the invention provides methods for detecting a biological, a physiological or a pathological marker, or a single molecule or a single cell using a droplet system integrated with rapid and sensitive fluorescence detection systems including, for example, a 3D particle detector. In alternative embodiments, the invention provides systems comprising integrated comprehensive droplet digitial detection (IC 3D).

The present invention discloses novel methods and omental, myocardial, liver, lung, renal, peritoneal, intestinal and pancreatic mesothelial cells which are useful for a number of procedures including drug discovery, co-culturing, cell therapy and bioassay. The invention provides a method for isolating these cells that improves upon the methods previously used and provides cells isolated in quantity. The present invention provides a list of secreted proteins from omentum mesothelial cells that can be utilized in the described cell based assays.