title: Induction of K562 lysis in autologous LGL and dense T cell cocultures.
abstract: Human large granular lymphocytes (LGL) were cultured with autologous dense T lymphocytes for 0-8 days. The mixed LGL dense T cell cultures had enhanced lytic activity against K562 on day 4, as compared to LGL cultured alone. Dense T cells cultured alone had no K562 lytic activity. The mixed LGL dense T cell cultures were reseparated on day 4 into low dense SRBC- and SRBC+ and into high dense subsets. Both low dense subsets did lyse K562 whereas the high dense subset did not lyse K562. Since the LGL population was the low dense SRBC- cells, the results suggested that the day 4 low dense SRBC+ cytotoxic population in the mixed LGL dense T cell culture originated from noncytotoxic dense T cells. Dense T cells were also separated into OKT8- and OKT8+ subsets and cultured together with LGL for 0-8 days. The LGL dense OKT8- T cell coculture had enhanced K562 lytic activity while the LGL dense OKT8+ T cell coculture had no enhanced lytic activity, as compared to LGL cultured alone. These results indicated that LGL interacted with the dense OKT8- T cells to produce the enhanced K562 lysis.
authors.forename: K
authors.initials: K
authors.lastname: Tsukuda
authors.forename: G E
authors.initials: GE
authors.lastname: Piontek
authors.forename: N
authors.initials: N
authors.lastname: Lewin
authors.forename: M
authors.initials: M
authors.lastname: Jondal
authors.forename: E
authors.initials: E
authors.lastname: Klein
mesh_terms: D000911:Antibodies, Monoclonal; D002452:Cell Count; D003602:Cytotoxicity, Immunologic; D006801:Humans; D066298:In Vitro Techniques; D007694:Killer Cells, Natural / Q000276:immunology*; D007959:Lymphocyte Culture Test, Mixed; D013601:T-Lymphocytes / Q000276:immunology*
chemical_list: D000911:Antibodies, Monoclonal