title: A high density cell culture system for generation of human lymphokine-activated killer (LAK) cells for clinical use in adoptive immunotherapy.
abstract: A high density cell culture system has been developed for large-scale production of lymphokine-activated killer (LAK) cells from peripheral blood lymphocytes (PBLs) of malignant tumor patients. The system consists of a culture bag, which has two compartments separated by a semipermeable membrane, and an external rotator. The system allows for a long-term, at least 4 weeks, culture of LAK cells at high cell density in the inner compartment. The collected PBLs were first divided between the two culture bags and cultured without harvesting for 7-10 days to obtain LAK cells. Half of the LAK cells from each bag was administered to patients twice a week for clinical trials. Culture of the remaining half was continued following addition of a fresh culture medium. LAK cells were transferred to patients alternatively from each bag for the following 2-3 weeks. The total number of LAK cells administered amounted to 3.9-9.8 (mean 5.8) times more than the PBLs collected by leukapheresis (n = 10). The 5 x 10(6)/ml of PBLS of the initial concentration reached a maximum of 2 x 10(7)/ml. Our system does not need for a CO2 incubator. Cytotoxicity of the LAK cells was evaluated in 4 hr 51Cr release assays. Mean cytotoxicity at maximum cell density was 95.4 +/- 3.2% against ONS-12 (a human glioma cell) and 84.8 +/- 3.0% against Daudi cells (n = 10), but gradually decreased to about 50% at the end of fourth week of the culture period. Cell viability of the LAK cells was normally over 80% through the entire culture period.(ABSTRACT TRUNCATED AT 250 WORDS)
authors.affiliation: Department of Neurosurgery, Osaka University Medical School, Japan.
authors.forename: K
authors.initials: K
authors.lastname: Shimizu
authors.forename: K
authors.initials: K
authors.lastname: Park
authors.forename: M
authors.initials: M
authors.lastname: Yamada
authors.forename: K
authors.initials: K
authors.lastname: Tarura
authors.forename: Y
authors.initials: Y
authors.lastname: Matsui
authors.forename: T
authors.initials: T
authors.lastname: Hayakawa
mesh_terms: D015703:Antigens, CD / Q000032:analysis; D002455:Cell Division; D002470:Cell Survival; D002478:Cells, Cultured; D046508:Culture Techniques / Q000295:instrumentation*; D003602:Cytotoxicity, Immunologic; D006801:Humans; D016219:Immunotherapy, Adoptive / Q000295:instrumentation*; D007376:Interleukin-2 / Q000494:pharmacology; D015979:Killer Cells, Lymphokine-Activated / Q000166:cytology* / Q000187:drug effects / Q000637:transplantation; D007937:Leukapheresis; D016131:Lymphocyte Subsets; D009369:Neoplasms / Q000097:blood / Q000628:therapy; D011994:Recombinant Proteins / Q000494:pharmacology
chemical_list: D015703:Antigens, CD; D007376:Interleukin-2; D011994:Recombinant Proteins