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Review
. 2001 Sep 15;19(18 Suppl):32S-40S.

The epidermal growth factor receptor: from mutant oncogene in nonhuman cancers to therapeutic target in human neoplasia

C L Arteaga  1
Affiliations
  • PMID: 11560969
Review

The epidermal growth factor receptor: from mutant oncogene in nonhuman cancers to therapeutic target in human neoplasia

C L Arteaga. J Clin Oncol. .

Abstract

Approximately two decades ago, the epidermal growth factor receptor (EGFR) was discovered to be the proto-oncogene of the mutant, constitutively active oncogenic v-erbB tyrosine kinase, which induces avian erythroblastosis. Unlike the mutant oncogene, the EGFR requires activation by binding of ligand to its extracellular (EC) domain, whereas its cellular effects depend on activation of its cytoplasmic tyrosine kinase. The overexpression of EGFR and its ligands in several human carcinomas and their association with accelerated tumor progression provided a rationale for targeting this network with tumor-selective strategies. Two of those antireceptor approaches, both solidly based on the known structure and function of the EGFR, are discussed. The first strategy involves the development of humanized monoclonal antibodies against the nonconserved receptor's EC domain. These antibodies block ligand binding and can induce receptor endocytosis and downregulation. The second approach is the generation of ATP mimetics that compete with ATP for binding to the receptor's kinase pocket, thus disabling signal transduction. Preclinical and early clinical studies already suggest that both of these approaches, either alone or in combination with standard anticancer therapies, will be able to alter the natural history of EGFR-expressing cancers with little to no toxicity to the tumor-bearing host.

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