title: Modulation of epidermal growth factor receptors by human alpha interferon.
abstract: Treatment of Madin-Darby bovine kidney (MDBK) cells with human interferon (IFN)-alpha 2 at 37 degrees C results in a dose-dependent inhibition of cell growth and a reduction of the subsequent binding of 125I-labeled epidermal growth factor (EGF) at 4 degrees C. Human IFN-beta and -gamma, which exhibit little antiviral and antiproliferative activities on MDBK cells, have little effect on cell growth or the binding of 125I-labeled EGF to these cells. The binding of EGF is decreased after exposure to IFN-alpha for greater than 8 hr. Scatchard analyses of the EGF binding data indicate that a 20-hr exposure period results in a decrease in the apparent number of cell-surface EGF receptors and a reduction in the affinity of EGF for its receptor. The rate of internalization of EGF by MDBK cells does not appear to be affected by IFN treatment.
mesh_terms: D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D004815:Epidermal Growth Factor / Q000378:metabolism / Q000494:pharmacology; D066246:ErbB Receptors / Q000032:analysis / Q000187:drug effects*; D006801:Humans; D007370:Interferon Type I / Q000494:pharmacology*; D007371:Interferon-gamma / Q000494:pharmacology
chemical_list: D007370:Interferon Type I; D004815:Epidermal Growth Factor; D007371:Interferon-gamma; D066246:ErbB Receptors