title: Identification of two U937 cell sublines exhibiting different patterns of response to tumour necrosis factor.
abstract: The monocytic cell line U937 is a frequently used model in studies on the cytotoxic effect of tumour necrosis factor (TNF). Two sublines of this cell line, termed U937(G) and U937(M), revealing different patterns of response to this cytokine, have been identified. The U937(G) cells, similarly to the cells obtained from ATCC, were resistant to the cytotoxic action of TNF in the absence of the protein-synthesis blocker cycloheximide (CHX). The U937(M) cells, however, were sensitive to the cytotoxic action of TNF both in the presence and absence of cycloheximide. Genetic analysis of the U937 sublines confirmed their common origin. The described U937 sublines may be useful models for analysis of the mechanisms of response to TNF. Additionally, our observation underscores the variability of the U937 cell line, which is described by most authors as a TNF-sensitive line.
authors: Department of Histology and Immunology, Intercollegiate Faculty of Biotechnology, Medical University of Gdańsk, Poland.
authors: L
authors: L
authors: Kaszubowska
authors: H
authors: H
authors: Engelmann
authors: M
authors: M
authors: Gotartowska
authors: M
authors: M
authors: Iliszko
authors: J
authors: J
authors: Bigda
mesh_terms: D000483:Alleles; D000818:Animals; D002460:Cell Line; D002470:Cell Survival / Q000187:drug effects; D003001:Cloning, Molecular; D003513:Cycloheximide / Q000494:pharmacology; D053938:DNA Fragmentation; D004305:Dose-Response Relationship, Drug; D005434:Flow Cytometry; D006801:Humans; D007621:Karyotyping; D051379:Mice; D016133:Polymerase Chain Reaction; D011500:Protein Synthesis Inhibitors / Q000494:pharmacology; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics; D020080:Tandem Repeat Sequences; D013997:Time Factors; D014409:Tumor Necrosis Factor-alpha / Q000494:pharmacology*; D020298:U937 Cells
chemical_list: D011500:Protein Synthesis Inhibitors; D018124:Receptors, Tumor Necrosis Factor; D014409:Tumor Necrosis Factor-alpha; D003513:Cycloheximide