Abstract:
:EGFRvIII, a frequently occurring mutation in primary glioblastoma, results in a protein product that cannot bind ligand, but signals constitutively. Deducing how EGFRvIII causes transformation has been difficult because of autocrine and paracrine loops triggered by EGFRvIII alone or in heterodimers with wild-type EGFR. Here, we document coexpression of EGFR and EGFRvIII in primary human glioblastoma that drives transformation and tumorigenesis in a cell-intrinsic manner. We demonstrate enhancement of downstream STAT signaling triggered by EGFR-catalyzed phosphorylation of EGFRvIII, implicating EGFRvIII as a substrate for EGFR. Subsequent phosphorylation of STAT3 requires nuclear entry of EGFRvIII and formation of an EGFRvIII-STAT3 nuclear complex. Our findings clarify specific oncogenic signaling relationships between EGFR and EGFRvIII in glioblastoma.
journal_name
Cancer Celljournal_title
Cancer cellauthors
Fan QW,Cheng CK,Gustafson WC,Charron E,Zipper P,Wong RA,Chen J,Lau J,Knobbe-Thomsen C,Weller M,Jura N,Reifenberger G,Shokat KM,Weiss WAdoi
10.1016/j.ccr.2013.09.004subject
Has Abstractpub_date
2013-10-14 00:00:00pages
438-49issue
4eissn
1535-6108issn
1878-3686pii
S1535-6108(13)00414-5journal_volume
24pub_type
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