Provided is a method for producing an antibody population and, specifically, to an antibody population of desired quality that is produced by culturing recombinant cells expressing antibodies under elaborately controlled culturing conditions such as pH and culture temperature, and a method for effectively producing an antibody population of high quality with excellent biological activity. The present method can effectively prepare an antibody population having desired proportions of main active antibodies and isomeric antibodies and an antibody population having a desired glycan structure by adjusting pH, culture temperature, and/or lactic acid supply. In addition, the present method can produce high-quality antibodies having excellent biological activity capable of reaching desired therapeutic efficacy when therapeutic monoclonal antibodies are generated. In particular, with respect to the manufacture of biosimilar drugs, it is possible to effectively manufacture antibodies of the same or very similar quality to the original drug by elaborately adjusting the culture conditions.

The present invention provides a compounded cell culture medium powder formulation comprising: a basal medium powder and a cell culture media supplement, wherein the cell culture media supplement comprises and one or more salts; one or more growth factors; one or more inorganic ions; an amino acid supplement comprising one or more of asparagine, glutamine, histidine, and serine; one or more buffers; and one or more anti-foaming agents. The invention further provides methods of making a compounded cell culture medium powder formulation methods of making a cell culture medium for growing mammalian cells and methods of producing a protein of interest by culturing cells in the cell culture medium and isolating the protein of interest.

The present invention relates to nutritive medium, medium supplement, media subgroup and buffer formulations. The present invention provides powder nutritive medium, medium supplement and medium subgroup formulations, e.g., cell culture medium supplements (including powdered sera such as powdered fetal bovine serum (FBS)), medium subgroup formulations and cell culture media comprising all of the necessary nutritive factors that facilitate the in vitro cultivation of cells. The invention further provides powder buffer formulations that produce particular ionic and pH conditions upon reconstitution with a solvent. The invention provides methods for production of media, media supplement, media subgroup and buffer formulations, and also provides kits and methods for cultivation of prokaryotic and eukaryotic cells, particularly bacterial cells, yeast cells, plant cells and animal cells (including human cells) using these dry powder nutritive media, media supplement, media subgroup and buffer formulations.

The present invention pertains to a method for the generation of neurotoxin-sensitive, neuronal differentiated cells comprising the steps of: a) cultivating tumor cells which are able to differentiate into neuronal cells in a culture medium under conditions and for a time which primes said tumor cells for neuronal differentiation; and b) cultivating the tumor cells primed for neuronal differentiation of a) in a differentiation medium having an osmolality of 100 to 270 mOsm/kg, and comprising (i) B27 supplement and/or (ii) N2 supplement, for at least 3 days, thereby obtaining neurotoxin-sensitive, neuronal differentiated cells. The invention further relates to neurotoxin-sensitive, neuronal differentiated cells obtainable by the method of the invention. In addition, the invention encompasses a method for determining the activity of a neurotoxin polypeptide comprising the steps of: a) contacting the neurotoxin-sensitive, neuronal differentiated cells obtainable by the method of the invention with a neurotoxin polypeptide; b) cultivating the neurotoxin-sensitive, neuronal differentiated cells of step a) for 3 to 74 hours or 72 hours under conditions which allow for the neurotoxin polypeptide to exert its biological activity; and c) determining the activity of the neurotoxin polypeptide in the said cells after cultivation according to step b). Finally, the invention provides for a medium comprising OptiMEM, FBS, B27 supplement, and N2 supplement.

The present disclosure relates to methods and compositions for reprogramming cells to a pluripotent state. In particular, it relates to an integration- and feeder cell-free method for reprogramming primary human fibroblast cells to induced pluripotent stem cells (iPSCs).

Systems and methods (S/M) to detect stress in stem cells are described. The S/M, including modified stem cells, assays and high throughput screens, can be used to identify compounds or other potential stressors that can negatively affect development potential.

Herein is reported a method for producing an immunoconjugate with reduced product- and process-related impurities by culturing mammalian cells that contain one or more nucleic acids encoding the immunoconjugate of interest in a cell culture medium, wherein the one or more nucleic acids are expressed under the conditions of cell culture comprising the steps of: culturing the mammalian cells in a cell culture medium at a first temperature and at a first pH; reducing the first temperature of the cell culture medium to a second temperature; and increasing the first pH of the cell culture medium to a second pH; recovering the immunoconjugate from the cells or the cell culture medium,
and thereby producing the immunoconjugate.

The present invention relates to feed media comprising deep eutectic solvents and/or ionic liquids.

A method of producing a three-dimensional cell tissue, including: a step A of mixing cells with a cationic substance and an extracellular matrix component to obtain a mixture; a step B of gathering the cells from the obtained mixture to form a cell aggregate on a substrate; and a step C of culturing the cells to obtain a three-dimensional cell tissue.

The present disclosure relates to methods and compositions for reprogramming cells to a pluripotent state. In particular, it relates to an integration- and feeder cell-free method for reprogramming primary human fibroblast cells to induced pluripotent stem cells (iPSCs).