摘要:
Disclosed are devices for detecting the presence of a preselected analyte in a fluid sample. The devices comprise a substrate microfabricated to define a sample inlet port, and a mesoscale flow system that includes a sample flow channel extending from the inlet port. The mesoscale flow system further includes an analyte detection region in fluid communication with the flow channel comprised of a binding moiety for specifically binding the analyte. The detection region is constructed with a mesoscale dimension sufficiently small to enhance binding of the binding moiety and the analyte. The binding moiety may be immobilized in the detection region. The mesoscale detection systems of the invention may be used in a wide range of applications, including the detection of cells or macromolecules, or for monitoring reactions or cell culture growth.
摘要:
Disclosed are devices and methods for analyzing a fluid cell containing sample. The devices are composed of a solid substrate, microfabricated to define at least one sample inlet port and a mesoscale flow system. The mesoscale flow system includes a sample flow channel, extending from the inlet port, and a cell handling region for treating cells disposed in fluid communication with the flow channel. The devices may further include a component for inducing flow of cells in the sample through the flow system. In one embodiment, the cell-handling region may include a cell lysis component to enable the lysis of cells in the sample, prior to, e.g., the detection of an intracellular component in the cell sample. In another embodiment, the cell handling region may have a cell capture region, with binding sites which reversibly bind to a specific population of cells in the cell sample, to permit the isolation of the specific cell population from the sample. The devices can be utilized in a wide range of automated sensitive and rapid tests for the analysis of a fluid cell containing sample.
摘要:
Disclosed are devices for amplifying a preselected polynucleotide in a sample by conducting a polynucleotide polymerization reaction. The devices comprise a substrate microfabricated to define a sample inlet port and a mesoscale flow system, which extends from the inlet port. The mesoscale flow system includes a polynucleotide polymerization reaction chamber in fluid communication with the inlet port which is provided with reagents required for polymerization and amplification of a preselected polynucleotide. In one embodiment the devices may be utilized to implement a polymerase chain reaction (PCR) in the reaction chamber (PCR chamber). The PCR chamber is provided with the sample polynucleotide, polymerase, nucleoside triphosphates, primers and other reagents required for the polymerase chain reaction, and the device is provided with means for thermally controlling the temperature of the contents of the reaction chamber at a temperature controlled to dehybridize double stranded polynucleotide, to anneal the primers, and to polymerize and amplify the polynucleotide.
摘要:
The invention discloses novel methods of detecting glycated proteins in test samples of blood and methods of detecting chronic hyperglycemia. The test sample is contacted with a binder composition under conditions which allow binding of glycated protein in the test sample to at least a portion of the binder composition. The test sample is then exposed to a glycated compound affixed to a solid support under conditions which allow raction of unbound binder composition from the previous step to at least a portion of the glycated compound on the solid support. The glycated compound affixed to a solid support from the previous step which did not react with the unbound binder composition is then reacted with a detecting agent and the detecting agent is detected.
摘要:
Provided are methods for detecting a disease or a condition in a subject, which disease or condition is known to be characterized by abnormal expression of an enzyme The present methods comprise contacting tissue of the subject with a substrate for the enzyme, the substrate chemiluminescing upon reaction with the enzyme, detecting chemiluminescence in the tissue, and, correlating the chemiluminescence to at least one of the presence or absence of the disease or condition in the subject, the stage of the disease or condition in the subject, or the response of the disease or condition in the subject to a therapy regimen The present invention permits sampling, diagnosis, and surveillance of conditions and diseases that are known to be characterized by abnormal expression of at least one enzyme.
摘要:
Disclosed are devices for amplifying a preselected polynucleotide in a sample by conducting a polynucleotide amplification reaction. The devices are provided with a substrate microfabricated to include a polynucleotide amplification reaction, chamber, having at least one cross-sectional dimension of about 0.1 to 1000 μm. The device also includes at least one port in fluid communication with the reaction chamber, for introducing a sample to the chamber, for venting the chamber when necessary, and, optionally, for removing products or waste material from the device. The reaction chamber may be provided with reagents required for amplification of a preselected polynucleotide. The device also may include means for thermally regulating the contents of the reaction chamber, to amplify a preselected polynucleotide. Preferably, the reaction chamber is fabricated with a high surface to volume ratio, to facilitate thermal regulation.
摘要:
A mesoscale sample preparation device capable of providing microvolume test samples, separated into a cell-enriched fraction and a fraction of reduced cell content, for performing various analyses, such as binding assays, determinations involving polynucleotide amplification and the like. Analytical systems including such devices are also disclosed.
摘要:
Disclosed are devices for detecting the presence of a preselected analyte in a fluid sample. The devices comprise a substrate microfabricated to define a sample inlet port, and a mesoscale flow system that includes a sample flow channel extending from the inlet port. The mesoscale flow system further includes an analyte detection region in fluid communication with the flow channel comprised of a binding moiety for specifically binding the analyte. The detection region is constructed with a mesoscale dimension sufficiently small to enhance binding of the binding moiety and the analyte. The binding moiety may be immobilized in the detection region. The mesoscale detection systems of the invention may be used in a wide range of applications, including the detection of cells or macromolecules, or for monitoring reactions or cell culture growth.