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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...
With a new flow cytometric cytotoxicity assay, we examined the mechanism of action of chimeric mouse human anti-CD20 monoclonal antibody IDEC-C2B8. IDEC-C2B8 alone induced direct cytotoxicity in four of eight examined CD20-expressing lymphoma cell lines (RAJI, DAUDI, JOK-1, and WT100) at a concentration above 100 ng/ml. Moreover, after 4 h incubation in human serum, only a moderate complement-dependent...
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