title: Differential effects of beta- and gamma-interferons on natural killer cell-mediated lysis of lung carcinoma cells.
abstract: Peripheral blood lymphocytes from healthy donors (PBL) poorly lyse lung carcinoma cell lines A-549, A-427 and SK- MES-1 when tested in a short-term chromium release assay. When PBL are preincubated with human beta-interferon (IFN-beta), these cell lines are lysed with an efficacy comparable to that of erythroleukemia K-562 cells, the standard targets used in natural killer cell assays. However, when PBL are preincubated with gamma-interferon (IFN-gamma) instead, lysis of the lung carcinoma lines is little augmented. Unlabeled lung carcinoma A-549 cells block chromium release from labeled K-562 cells with non-boosted and IFN-gamma or IFN-beta-boosted effector cells. Also with the IFN-beta treated effectors, chromium release from A-549 targets is inhibited by unlabeled K-562 cells. Therefore, cells that lyse K-562 cells must be able to recognize A-549 cells, and, in the case of IFN-beta pretreated effectors, cause the killing of these cells as well. Data obtained with effector cells separated on discontinuous Percoll gradients also indicate that the same cells that lyse A-549 cells are responsible for lysis of K-562 cells. We conclude that in response to IFN-beta, effector cells previously able to lyse K-562, but unable to lyse A-549 targets, mature into fully competent killer cells capable of lysing tumor cells from lymphoid as well as from lung cancer origin. This effect is not elicited by IFN-gamma, indicating that killer cells respond differently to both interferon types.
mesh_terms: D000328:Adult; D002460:Cell Line; D003602:Cytotoxicity, Immunologic; D006801:Humans; D066298:In Vitro Techniques; D007370:Interferon Type I / Q000494:pharmacology*; D007371:Interferon-gamma / Q000494:pharmacology*; D007694:Killer Cells, Natural / Q000276:immunology*; D008175:Lung Neoplasms / Q000276:immunology*; D008297:Male; D008875:Middle Aged
chemical_list: D007370:Interferon Type I; D007371:Interferon-gamma