DOK2 inhibits EGFR-mutated lung adenocarcinoma.
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Somatic mutations in the EGFR proto-oncogene occur in ~15% of human lung adenocarcinomas and the importance of EGFR mutations for the initiation and maintenance of lung cancer is well established from mouse models and cancer therapy trials in human lung cancer patients. Recently, we identified DOK2 as a lung adenocarcinoma tumor suppressor gene. Here we show that genomic loss of DOK2 is associated with EGFR mutations in human lung adenocarcinoma, and we hypothesized that loss of DOK2 might therefore cooperate with EGFR mutations to promote lung tumorigenesis. We tested this hypothesis using genetically engineered mouse models and find that loss of Dok2 in the mouse accelerates lung tumorigenesis initiated by oncogenic EGFR, but not that initiated by mutated Kras. Moreover, we find that DOK2 participates in a negative feedback loop that opposes mutated EGFR; EGFR mutation leads to recruitment of DOK2 to EGFR and DOK2-mediated inhibition of downstream activation of RAS. These data identify DOK2 as a tumor suppressor in EGFR-mutant lung adenocarcinoma.
Epidermal Growth Factor
Extracellular Signal-Regulated MAP Kinases
Adaptor Proteins, Signal Transducing
Tumor Suppressor Proteins
Gene Knockout Techniques
Adenocarcinoma of Lung
Published Version (Please cite this version)10.1371/journal.pone.0079526
Publication InfoChen, Ming; Berger, Alice H; Morotti, Alessandro; Janas, Justyna A; Niki, Masaru; Bronson, Roderick T; ... Pandolfi, Pier Paolo (2013). DOK2 inhibits EGFR-mutated lung adenocarcinoma. PloS one, 8(11). pp. e79526. 10.1371/journal.pone.0079526. Retrieved from https://hdl.handle.net/10161/18171.
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Assistant Professor in Pathology
Our laboratory is interested in understanding the molecular and genetic events underlying cancer progression and metastasis. The focus of our work is a series of genetically engineered mouse models that faithfully recapitulate human disease. Using a combination of mouse genetics, omics technologies, cross-species analyses and in vitro approaches, we aim to identify cancer cell–intrinsic and –extrinsic mechanisms driving metastatic cancer progression, with a long