title: Epidermal growth factor receptor degradation: an alternative view of oncogenic pathways.
abstract: Positive regulation of epidermal growth factor receptor signalling is related to many human malignancies. Besides overexpression and gain of function mutations, the escape from negative regulation through an increase in epidermal growth factor receptor stability has evolved as yet another key factor contributing to enhanced receptor activity. Intensive research over the past years has provided considerable evidence concerning the molecular mechanisms which provide epidermal growth factor receptor degradation. c-Cbl mediated ubiquitination, endocytosis via clathrin-coated pits, endosomal sorting and lysosomal degradation have become well-investigated cornerstones. Recent findings on the interdependency of the endosomal sorting complexes required for transport in multivesicular body sorting, stress the topicality of receptor tyrosine kinase downregulation. Here, we review the degradation pathway of the epidermal growth factor receptor, following the receptor from ligand binding to the lysosome and illustrating different modes of oncogenic deregulation.
authors.affiliation: Clinical Division of Oncology, Department of Medicine I, Medical University Vienna, Austria.
authors.forename: Andreas
authors.initials: A
authors.lastname: Kirisits
authors.forename: Dietmar
authors.initials: D
authors.lastname: Pils
authors.forename: Michael
authors.initials: M
authors.lastname: Krainer
mesh_terms: D000818:Animals; D015536:Down-Regulation; D004705:Endocytosis / Q000502:physiology; D066246:ErbB Receptors / Q000378:metabolism*; D006801:Humans; D008247:Lysosomes / Q000378:metabolism; D008954:Models, Biological; D009369:Neoplasms / Q000378:metabolism* / Q000503:physiopathology; D021381:Protein Transport / Q000502:physiology; D050721:Proto-Oncogene Proteins c-cbl / Q000378:metabolism
chemical_list: D050721:Proto-Oncogene Proteins c-cbl; D066246:ErbB Receptors