152 results about "Cell based assays" patented technology

The present invention includes devices, systems, and methods for assaying cells using cell-substrate impedance monitoring. In one aspect, the invention provides cell-substrate impedance monitoring devices that comprise electrode arrays on a nonconducting substrate, in which each of the arrays has an approximately uniform electrode resistance across the entire array. In another aspect, the invention provides cell-substrate monitoring systems comprising one or more cell-substrate monitoring devices comprising multiple wells each having an electrode array, an impedance analyzer, a device station that connects arrays of individual wells to the impedance analyzer, and software for controlling the device station and impedance analyzer. In another aspect, the invention provides cellular assays that use impedance monitoring to detect changes in cell behavior or state. In some preferred aspects, the assays are designed to investigate the affects of compounds on cells, such as cytotoxicity assays. In other preferred aspects, the assays are designed to investigate the compounds that effect IgE-mediated responses of cells to antigens.

This invention provides methods and apparatus for performing microanalytic analyses and procedures, particularly miniaturized cell based assays. These methods are useful for performing a variety of cell-based assays, including drug candidate screening, life sciences research, and clinical and molecular diagnostics.

The instant invention provides a method for establishing safety profiles for chemical compounds, as well as pharmacological profiling said method comprising (A) testing the effects of said chemical compounds on the amount and/or post-translational modifications of two or more macromolecules in intact cells; (B) constructing a pharmacological profile based on the results of said tests; and (C) comparing said profile to the profile(s) of drugs with established safety characteristics. Additionally, the invention is also directed to a composition comprising an assay panel, said panel comprising at least one high-content assay for the amount and/or post-translational modification of a protein and at least one high-content assay for the amount and/or subcellular location of a protein-protein interaction.

Described herein is a discovery Platform Technology for analyzing a biological system or process (e.g., a disease condition, such as cancer) via model building.

The methods generally relate to three-dimensional culturing of cells with the steps of seeding a cell support structure in a device with at least one vessel for cell culture having a bottom, at least one wall and a cell support structure for three-dimensional cell culture. The cell support structure is inside the at least one vessel and the device is configured such that assays can be performed. Devices for performing cell culture and assays are also provided. It will be understood that the devices can have many different suitable configurations. In general, the devices are selected such that they can be used with suitable radiation based assays.

Described herein is a discovery Platform Technology for analyzing a biological system or process (e.g., a disease condition, such as cancer) via model building

A cellular scaffold that is suitable for tissue regeneration, cell culture and in vitro assays. The invention relates to a layered cell scaffold that is seeded with mesenchymal and ectodermal cells. The layered cellular scaffold comprises an inoculum of mesenchymal cells and ectodermal cells positioned between two opposing scaffolds in a sandwich configuration. The layered cell scaffold provides a functional skin equivalent that is suitable for transplantation and in vitro cell-based assays.

The invention relates to a new “gene-switch” (cumate-inducible switch) for mammalian cells. This switch is as useful in the development of expression systems and cell-based assays for functional genomics as in the generation of viral vectors for gene therapy.

A cell-based assay system in which the detection of the reporter gene activity, or secreted alkaline phosphatase (SEAP), is dependent upon the protease activity of the Hepatitis C virus NS3 gene product. This system can be used to assess the activity of candidate protease inhibitors in a mammalian cell-based assay system. The assay system is simpler than previously described assays due to the use of SEAP which allows the reporter gene activity to be quantified by measuring the amount of secreted gene product in the cell media by monitoring the conversion of luminescent or calorimetric alkaline phosphatase substrate.

The present invention is directed to a biochip assembly comprising a semi-permeable membrane and an assay method using said biochip assembly for carrying out cell based assays.

Ideally, such a method involves measuring the migration of cells in a channel under the influence of an analyte wherein said cells are separated from said analyte by a semi-permeable membrane and said analyte and/or said cells are subjected to controlled flow conditions.

Disclosed are compositions and methods for their use, such as in identifying G-protein-coupled receptors, ligands and compounds that modulate the activities of G-protein-coupled receptors. The compositions and methods employ cyclic nucleotide-gated channels and fluorescence dyes in detecting changes of intracellular cAMP levels in response to the stimulation of G-protein-coupled receptors. Activation of the G-protein-coupled receptors can be detected in a variety of assays, including cell-based imaging assays with fluorescence microscopes and high throughput assays with multi-well plates and fluorescence plate readers.

The present invention relates to methods, systems, and kits for intoxicating cells, neuronal and non-neuronal cells, with a toxin or fragment thereof. This is done by subjecting toxin substrate and a lipid or polymeric carrier (e.g., DNA uptake facilitating agent) to one or more cells for use in cell based assays. In an aspect, the methods of the present invention allow for high throughput assays and, as such, for the evaluation of drug candidates.

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.

This patent describes a novel in vitro cell-based method for biological validation and pharmacological screening of drugs, new chemical entities (NCEs) and biologics, which is predictive of in vivo testing for efficacy and adverse events in patients, as occurs in clinical trials. The same method can be used to create an in vitro cell-based assay to identify the ‘right marketed medication for the right patient’ (personalized medicine), and to identify responders/non-responders in ongoing clinical trials with NCEs. In addition this approach can be used to identify new indications for existing medicines and new indications for NCEs that were unsuccessful in their intended uses.

Compositions and methods are provided for the classification of biologically active agents according to their effect on human biology, through the use of complex, primary human cell-based disease models in scalable assay formats. The systems of the invention utilize the simultaneous activation of multiple signaling pathways to generate and identify patterns of expression of physiologically important cell surface and secreted molecules. Combinations of multiple cell types may be utilized. Systems encompassing multiple cell types not only respond to perturbations of each cell type's intracellular signaling networks, but also to inhibition of pathways of communication between cells. Readout information may be combined in multi-system analysis, where the profiles obtained from multiple systems are combined in order to provide enhanced resolution for agent classification.

A method for evaluation of molecules to identify those that can act as therapeutic inhibitors of Hsp90 makes use of a fluorescence polarization (FP) assay and a cell based assay, either individually or in combination. The FP assay uses a fluorescently-labeled Hsp90 binding agent and measure the degree of fluorescence polarization relative to the standard. A decrease in the degree of polarization indicates that fluorescently-labeled Hsp90 binding agent has been wholly or partially displaced by a candidate molecule, and identifies the molecule as having activity as an inhibitor of Hsp90. The cell based assay tests for decrease is an Hsp90-dependent activity of normal or tumor cells.

There is provided a cell culture microtrench being defined on or in a surface of a substrate, wherein the ratio of the width of the microtrench to the maximum length of the short axis of a cell type of interest is about 6 or preferably less, the length of the short axis of the cell type being measured when a cell is in detached or suspended form. There is also provided an array comprising such a microtrench and uses of such microtrenches, including cell-based assays.

A microfluidic device, method and kit for assaying and/or culturing cells are provided. The microfluidic device comprises a well block comprising a plurality of microwells; at least one cell culture layer selected from a first cell culture layer comprising a plurality of microchannels, each microchannel being aligned with one of the plurality of microwells and being in fluid communication with the aligned microwells; and a second cell culture layer comprising a plurality of cell culture chamber wells, each cell culture chamber well being aligned with one of the plurality of microwells and being in fluid communication with the aligned microwells, and a plurality of outlets, each of the plurality of outlets corresponding to one of the plurality of cell culture chamber wells; and a base block, wherein the at least one cell culture layer is sealably coupled between the well block and the base block, thereby allowing fluid communication between the plurality of microwells in the well block and the at least one cell culture layer.