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- W2372620152 abstract "Objective:To investigate the availability for rhIL-18 in the in vitro culture system to stimulate PBMHCs,with inducing cytotoxicities against tumor cells and to analyze the influencing factors for the effects.Methods:The NK cells,T cells and dendritic cells were separated from fresh PBMNCs by using the Stem Sep TM immunomagnetic beads.Cell phenotypes of the purified cell populations were identified with FCM technique.The cell co-culture system was established as follows.The PBMNCs or the cell preparations deleting the definite cell subset with immunoscreening were co-cultivated with mitotic-inactivated tumor cells in the presence of rhIL-18.Cytotoxicities of the various effector cell preparations to a series of tumor cell lines were examined by the isotope releasing assay.Results:In the in vitro cell co-culture system,rhIL-18 rapidly induces activation of the cytolytic responses against various tumor cell lines mediated by PBMNCs.The rapid induction within 24 h of culture was dependent on the dosage of rhIL-18,with the optimal dose of 100 ng/ml of the cytokine.The activated cytotoxicities were abrogated by deleting NK cells prior to the cell co-culture but did not vary when either T cells or DCs were removed.The cytotoxic responses were shown as a pattern of broad-spectrum to the target cells used and were not blocked by anti-MHC moAbs.Conclusion:NK cells were responsible for the rapid induction of cytotoxicities against tumor cells by rhIL-18." @default.
- W2372620152 created "2016-06-24" @default.
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- W2372620152 date "2003-01-01" @default.
- W2372620152 modified "2023-09-25" @default.
- W2372620152 title "The cytotoxic activity against tumor cells induced rapidly in vitro the cell co-culture system by rhIL-18" @default.
- W2372620152 hasPublicationYear "2003" @default.
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