Abstract:
A method for stabilizing cells in cell culture production, the method comprising culturing a cell line capable of expressing proteins in cell culture media, and supplementing said cell culture media with a graft polymer in which N-vinyl caprolactam and vinyl acetate moieties are grafted on a polyethylene glycol backbone.
Abstract:
A transfection reagent composition comprising: 30-60 MOL.% of a cationic lipid, or a pharmaceutical acceptable salt thereof; 10-60 MOL% of a structural lipid; 10-20 MOL% of a triglyceride; and 0.1 to about 10 MOL.% of a stabilizing agent, is provided. The transfection agent is effective in transfecting cells, particularly neurons, with siRNA, mRNA and plasmid nucleic acid, and maintaining viability of the cells as well as activity of the delivered nucleic acid.
Abstract:
Provided herein are methods of culturing a mammalian cell in a liquid medium including poloxamer-188 at a concentration of 1.8 g/L or at a greater concentration than 1.8 g/L more or a liquid medium that includes a poloxamer-188 concentration that is selected based on one or more factors selected from the group of: pore size, pore type, gas flow rate, viable cell density in the medium, and markers related to cell stress.
Abstract:
The present disclosure is directed to methods to improve the yields of proteins recombinantly produced in eukaryotic cells comprising the addition of anionic substances such as valproate, malate, succinate, fumarate, citrate (e.g., ferric citrate), polyanionic compounds (e.g., polysulfated compounds such dextran sulfate or polyvinyl sulfate), and combinations thereof, wherein the addition of such compounds reduces the binding of recombinant proteins to the cell surface, therefore increasing the amount of soluble protein that can recovered from the culture medium. In addition, the protein yields can be improved according to the disclosed methods by preventing or reducing cell growth inhibition caused by the binding of the expressed recombinant proteins (e.g., neublastin, or antibodies or antigen-binding fragments thereof) to the cell surface. The disclosed anionic substances can also be used during the harvesting phase of a protein production process to release the expressed recombinant proteins from the cell surface prior to protein purification.
Abstract:
There is provided a device, and related method and uses, for drawing a polymer fiber, the device comprising: a. at least two polymer compartments, wherein each polymer compartment is capable of retaining a polymer solution, and wherein adjacent compartments comprise different polymer solutions; and b. a slider comprising at least one prong, wherein the prong is capable of contacting the different polymer solutions, and wherein the slider is arranged in a retractable manner from the at least two polymer compartments. There is further provided a system and a related method for manufacturing a polymer fiber.
Abstract:
Described herein are cell culture media, kits and methods for preparing cell culture media, and methods for culturing cells, for example, cells of the female reproductive tract, and tumor cells.
Abstract:
The present invention relates to oligopeptide-free cell culture media comprising at least 0.5 mg/L of a polyamine and to methods for cultivating cells in said oligopeptide-free cell culture media comprising at least 0.5 mg/L of a polyamine. The invention also relates to methods for expressing at least one protein in a medium comprising at least 0.5 mg/L of a polyamine and to methods for producing at least one virus in a medium comprising at least 0.5 mg/L of a polyamine.
Abstract:
Hybridoma cell line producing high levels of human sequence antibody. Also described is a hybridoma cell line producing human sequence antibodies that is adapted for growth in serum-free media or animal-derived-components-free media. A hybridoma cell line producing anti-CTLA4 antibodies is most preferred.
Abstract:
A method for stimulating pancreatic cells to synthesize and/or excrete insulin comprises contacting insulin-producing cells, in particular their aqueous suspension, with a water-soluble cellulose derivative, in particular selected from alkylated, hydroxyalkylated, and alkylated-hydroxyalkylated cellulose or a mixture thereof. A medium for the culture of pancreatic beta -cells contains an effective cell-stimulating amount of a cellulose derivative. It can be used to stimulate pancreatic beta -cells to produce and/or excrete insulin. An apparatus for such stimulation comprises a container holding a solution of a cellulose derivative in an aqueous culture medium. Stimulation of pancreatic beta -cells by a cellulose derivative is useful in the management of diabetes. Further preservative or therapeutic methods using the aqueous cellulose derivatives are disclosed.
Abstract:
Lipid microemulsions which can be added to cell culture media to provide essential lipids in a bioavailable form and their components are disclosed. Methods to disperse lipids in culture media by the use of one or more emulsifiers are described. Further disclosed are media which support growth of cells and production of recombinant, viral and/or native products wherein lipids are supplied in the form of a microemulsion.