title: Tissue plasminogen activator (t-PA) production by a high density culture of weakly adherent human embryonic kidney cells using a polyurethane-foam packed-bed culture system.
abstract: Weakly adherent cells of the 293 line attached well to the internal surface of polyurethane foam (PUF) and grew to the high density of 6.83 x 10(7) cells/cm3 PUF in stationary culture. The maximum productivity of tissue plasminogen activator (t-PA) was 0.158 IU/10(6) cells per day. The productivity decreased at the stationary phase of cell growth, so we designed a PUF-plate packed-bed culture system for high density culture and continuous production of t-PA. A maximal cell density of 3.24 x 10(7) cells/cm3 PUF and a t-PA productivity of 0.326 IU/10(6) cells per day were obtained in 25-day perfusion cultures. Although the cell density decreased to half that in PUF stationary culture, the t-PA productivity increased twofold and was maintained for 25 culture days.
authors.affiliation: Department of Chemical Engineering, Faculty of Engineering, Kyushu University, Fukuoka, Japan.
authors.forename: Y
authors.initials: Y
authors.lastname: Kawakubo
authors.forename: T
authors.initials: T
authors.lastname: Matsushita
authors.forename: K
authors.initials: K
authors.lastname: Funatsu
mesh_terms: D002455:Cell Division; D002478:Cells, Cultured; D004622:Embryo, Mammalian; D006801:Humans; D007668:Kidney / Q000166:cytology / Q000378:metabolism*; D011140:Polyurethanes; D010959:Tissue Plasminogen Activator / Q000096:biosynthesis*
chemical_list: D011140:Polyurethanes; D010959:Tissue Plasminogen Activator