title: Influence of immunomodulatory drugs on the cytotoxicity induced by monoclonal antibody 17-1A and interleukin-2.
abstract: Patients treated with monoclonal antibodies and cytokines for cancer receive often co-medication, which may influence treatment efficacy. Therefore, we investigated with a flowcytometric cytotoxicity assay the effect of several immunomodulatory drugs on antibody dependent cellular cytotoxicity (ADCC), interleukin-2 (IL-2) induced cytotoxicity and IL-2-induced-ADCC. We found that dexamethasone markedly inhibited the IL-2 induced cytotoxicity and the IL-2-induced-ADCC. Ondansetron, a 5-HT-3 serotonin receptor antagonist augmented significantly ADCC. Clemastine, a histamine type-2 receptor antagonist augmented the IL-2-induced-ADCC. The TNF antagonist thalidomide suppressed ADCC whereas pentoxifylline proved to be ineffective. Other tested drugs namely ibuprofen and indomethacin, both prostaglandin E2 antagonists, cimetidine a histamine type-2 receptor antagonist, the opioid pethidine, prostaglandin E2 and histamine exerted minor effects or had no influence on the tested parameters. We conclude that glucocorticosteroids should be avoided with monoclonal antibody and cytokine treatment. According to our in vitro data the other drugs tested did not have a negative impact on cellular cytotoxicity and ADCC.
authors.affiliation: Medizinische Klinik und Poliklinik I, Allgemeine Innere Medizin, Universität Bonn, Sigmund-Freud-Str. 25, 53105 Bonn, Germany. d.flieger@uni-bonn.de
authors.forename: Dimitri
authors.initials: D
authors.lastname: Flieger
authors.forename: Michael
authors.initials: M
authors.lastname: Varvenne
authors.forename: Rolf
authors.initials: R
authors.lastname: Kleinschmidt
authors.forename: Ingo G H
authors.initials: IG
authors.lastname: Schmidt-Wolf
mesh_terms: D000911:Antibodies, Monoclonal / Q000633:toxicity*; D058846:Antibodies, Monoclonal, Murine-Derived; D000920:Antibody-Dependent Cell Cytotoxicity / Q000187:drug effects*; D002478:Cells, Cultured; D003601:Cytotoxicity Tests, Immunologic; D003602:Cytotoxicity, Immunologic / Q000187:drug effects*; D005434:Flow Cytometry; D006801:Humans; D007155:Immunologic Factors / Q000494:pharmacology*; D007376:Interleukin-2 / Q000633:toxicity*
chemical_list: D000911:Antibodies, Monoclonal; D058846:Antibodies, Monoclonal, Murine-Derived; D007155:Immunologic Factors; D007376:Interleukin-2; C400149:Edrecolomab