title: Selecting and designing cell lines for improved physiological characteristics.
abstract: We have developed several approaches to create cell lines with improved characteristics in cell culture. In some cases it has been possible to isolate natural variants with useful properties. Cholesterol independent variants of the mouse NSO myeloma cell line were isolated by cloning in a selective medium. A glutamine independent variant of a hyridoma was isolated by continuous (chemostat) culture under glutamine limited conditions in the presence of glutamate. Choline independent cells were isolated from a choline limited chemostat. In an alternative approach to modifying cell behaviour, we have used recombinant DNA techniques to introduce the glutamine synthetase (GS) gene to a hybridoma. This resulted in glutamine independence and increased productivity.
authors.affiliation: Celltech Limited, Slough, Berkshire, U.K.
authors.forename: J R
authors.initials: JR
authors.lastname: Birch
authors.forename: R C
authors.initials: RC
authors.lastname: Boraston
authors.forename: H
authors.initials: H
authors.lastname: Metcalfe
authors.forename: M E
authors.initials: ME
authors.lastname: Brown
authors.forename: C R
authors.initials: CR
authors.lastname: Bebbington
authors.forename: R P
authors.initials: RP
authors.lastname: Field
mesh_terms: D000818:Animals; D002455:Cell Division / Q000187:drug effects; D002784:Cholesterol / Q000494:pharmacology; D002794:Choline / Q000494:pharmacology; D002999:Clone Cells; D046508:Culture Techniques / Q000379:methods*; D004274:DNA, Recombinant / Q000378:metabolism; D005974:Glutamate-Ammonia Ligase / Q000096:biosynthesis*; D018698:Glutamic Acid / Q000494:pharmacology; D005973:Glutamine / Q000494:pharmacology; D006825:Hybridomas / Q000166:cytology; D051379:Mice; D009101:Multiple Myeloma; D011994:Recombinant Proteins / Q000096:biosynthesis*; D014162:Transfection; D014407:Tumor Cells, Cultured
chemical_list: D004274:DNA, Recombinant; D011994:Recombinant Proteins; D005973:Glutamine; D018698:Glutamic Acid; D002784:Cholesterol; D005974:Glutamate-Ammonia Ligase; D002794:Choline