PMID- 20824044 OWN - NLM STAT- MEDLINE DCOM- 20110112 LR - 20220316 IS - 1476-5586 (Electronic) IS - 1522-8002 (Print) IS - 1476-5586 (Linking) VI - 12 IP - 9 DP - 2010 Sep TI - Epidermal growth factor receptor in glioma: signal transduction, neuropathology, imaging, and radioresistance. PG - 675-84 AB - Aberrant epidermal growth factor receptor (EGFR) signaling is common in cancer. Increased expression of wild type and mutant EGFR is a widespread feature of diverse types of cancer. EGFR signaling in cancer has been the focus of intense investigation for decades primarily for two reasons. First, aberrant EGFR signaling is likely to play an important role in the pathogenesis of cancer, and therefore, the mechanisms of EGFR-mediated oncogenic signaling are of interest. Second, the EGFR signaling system is an attractive target for therapeutic intervention. EGFR gene amplification and overexpression are a particularly striking feature of glioblastoma (GBM), observed in approximately 40% of tumors. GBM is the most common primary malignant tumor of the central nervous system in adults. In approximately 50% of tumors with EGFR amplification, a specific EGFR mutant (EGFRvIII, also known as EGFR type III, de2-7, Delta EGFR) can be detected. This mutant is highly oncogenic and is generated from a deletion of exons 2 to 7 of the EGFR gene, which results in an in-frame deletion of 267 amino acids from the extracellular domain of the receptor. EGFRvIII is unable to bind ligand, and it signals constitutively. Although EGFRvIII has the same signaling domain as the wild type receptor, it seems to generate a distinct set of downstream signals that may contribute to an increased tumorigenicity. In this review, we discuss recent progress in key aspects of EGFR signaling in GBM, focusing on neuropathology, signal transduction, imaging of the EGFR, and the role of the EGFR in mediating resistance to radiation therapy in GBM. FAU - Hatanpaa, Kimmo J AU - Hatanpaa KJ AD - Department of Pathology, University of Texas Southwestern Medical Center, Dallas, TX, USA. FAU - Burma, Sandeep AU - Burma S FAU - Zhao, Dawen AU - Zhao D FAU - Habib, Amyn A AU - Habib AA LA - eng GR - R01 NS062080/NS/NINDS NIH HHS/United States GR - R21 CA141348/CA/NCI NIH HHS/United States GR - 1R21 CA141348-01A1/CA/NCI NIH HHS/United States GR - R01NS062080-01A2/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Review PL - United States TA - Neoplasia JT - Neoplasia (New York, N.Y.) JID - 100886622 RN - 0 (Mutant Proteins) RN - 0 (Radiopharmaceuticals) RN - EC 2.7.10.1 (ErbB Receptors) SB - IM MH - Adult MH - *Brain Neoplasms/diagnosis/etiology/genetics/radiotherapy MH - Diagnostic Imaging/*methods MH - ErbB Receptors/antagonists & inhibitors/genetics/*physiology MH - *Glioma/diagnosis/etiology/genetics/radiotherapy MH - Humans MH - Models, Biological MH - Molecular Targeted Therapy/methods MH - Mutant Proteins/genetics/physiology MH - Radiation Tolerance/*genetics/physiology MH - Radiopharmaceuticals/therapeutic use MH - Signal Transduction/genetics/physiology PMC - PMC2933688 EDAT- 2010/09/09 06:00 MHDA- 2011/01/13 06:00 PMCR- 2010/09/01 CRDT- 2010/09/09 06:00 PHST- 2010/05/17 00:00 [received] PHST- 2010/06/07 00:00 [revised] PHST- 2010/06/08 00:00 [accepted] PHST- 2010/09/09 06:00 [entrez] PHST- 2010/09/09 06:00 [pubmed] PHST- 2011/01/13 06:00 [medline] PHST- 2010/09/01 00:00 [pmc-release] AID - 10688 [pii] AID - 10.1593/neo.10688 [doi] PST - ppublish SO - Neoplasia. 2010 Sep;12(9):675-84. doi: 10.1593/neo.10688.