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Type: Journal article
Title: Perverted responses of the human granulocyte-macrophage colony-stimulating factor receptor in mouse cell lines due to cross-species b-subunit association
Author: Mc Clure, B.
Stomski, F.
Lopez, A.
Woodcock, J.
Citation: Blood, 2001; 98(10):3165-3168
Publisher: Amer Soc Hematology
Issue Date: 2001
ISSN: 0006-4971
Abstract: Transfected murine cell lines are commonly used to study the function of many human cytokine or receptor mutants. This study reports the inappropriate activation of the human granulocyte-macrophage colony-stimulating factor (hGM-CSF) receptor by the human GM-CSF antagonist, E21R, when the human receptor is introduced into the murine cell line BaF-B03. E21R-induced proliferation of the BaF-B03 cells is dependent on transfection with both hGM-CSF receptor alpha and beta(c) subunits. Studies on the underlying mechanism revealed constitutive association between human and mouse beta(c) and GM-CSF receptor-alpha, tyrosine phosphorylation of mouse and human beta(c), and association of phosphorylated mouse beta(c) into an activated human GM-CSF receptor complex in response to E21R and GM-CSF. This interspecies receptor cross-talk of receptor signaling subunits may produce misleading results and emphasizes the need to use cell lines devoid of the cognate endogenous receptors for functional analysis of ligand and receptor mutants.
Keywords: Cell Line; Tumor Cells, Cultured; Animals; Humans; Mice; Leukemia, Erythroblastic, Acute; Macromolecular Substances; Granulocyte-Macrophage Colony-Stimulating Factor; Receptors, Granulocyte-Macrophage Colony-Stimulating Factor; Protein Subunits; Recombinant Proteins; Recombinant Fusion Proteins; Ligands; Artifacts; Transfection; Signal Transduction; Receptor Cross-Talk; Species Specificity; Protein-Tyrosine Kinases; Leukemia, Megakaryoblastic, Acute; Protein Multimerization
RMID: 0020011110
DOI: 10.1182/blood.V98.10.3165
Appears in Collections:Medicine publications

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