EGFR phosphorylation of DCBLD2 recruits TRAF6 and stimulates AKT-promoted tumorigenesis.
Abstract
Aberrant activation of EGFR in human cancers promotes tumorigenesis through stimulation
of AKT signaling. Here, we determined that the discoidina neuropilin-like membrane
protein DCBLD2 is upregulated in clinical specimens of glioblastomas and head and
neck cancers (HNCs) and is required for EGFR-stimulated tumorigenesis. In multiple
cancer cell lines, EGFR activated phosphorylation of tyrosine 750 (Y750) of DCBLD2,
which is located within a recently identified binding motif for TNF receptor-associated
factor 6 (TRAF6). Consequently, phosphorylation of DCBLD2 Y750 recruited TRAF6, leading
to increased TRAF6 E3 ubiquitin ligase activity and subsequent activation of AKT,
thereby enhancing EGFR-driven tumorigenesis. Moreover, evaluation of patient samples
of gliomas and HNCs revealed an association among EGFR activation, DCBLD2 phosphorylation,
and poor prognoses. Together, our findings uncover a pathway in which DCBLD2 functions
as a signal relay for oncogenic EGFR signaling to promote tumorigenesis and suggest
DCBLD2 and TRAF6 as potential therapeutic targets for human cancers that are associated
with EGFR activation.
Type
Journal articleSubject
Cells, CulturedHumans
Glioma
Head and Neck Neoplasms
Brain Neoplasms
Receptor, Epidermal Growth Factor
TNF Receptor-Associated Factor 6
Membrane Proteins
Signal Transduction
Phosphorylation
Proto-Oncogene Proteins c-akt
Carcinogenesis
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https://hdl.handle.net/10161/17852Published Version (Please cite this version)
10.1172/jci73093Publication Info
Feng, Haizhong; Lopez, Giselle Y; Kim, Chung Kwon; Alvarez, Angel; Duncan, Christopher
G; Nishikawa, Ryo; ... Cheng, Shi-Yuan (2014). EGFR phosphorylation of DCBLD2 recruits TRAF6 and stimulates AKT-promoted tumorigenesis.
The Journal of clinical investigation, 124(9). pp. 3741-3756. 10.1172/jci73093. Retrieved from https://hdl.handle.net/10161/17852.This is constructed from limited available data and may be imprecise. To cite this
article, please review & use the official citation provided by the journal.
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Darell Doty Bigner
E. L. and Lucille F. Jones Cancer Distinguished Research Professor, in the School
of Medicine
The Causes, Mechanisms of Transformation and Altered Growth Control and New Therapy
for Primary and Metastatic Tumors of the Central Nervous System (CNS). There are
over 16,000 deaths in the United States each year from primary brain tumors such as
malignant gliomas and medulloblastomas, and metastatic tumors to the CNS and its covering
from systemic tumors such as carcinoma of the lung, breast, colon, and melanoma. An
estimated 80,000 cases of primary brain tumors were expected to
Giselle Yvette López
Assistant Professor in Pathology
I am a physician scientist with a clinical focus on neuropathology, and a research
interest in brain tumors. Originally from Maryland, I completed my undergraduate training
at the University of Maryland, completing degrees in Physiology and Neurobiology as
well as Spanish Language and Literature. I subsequently came to Duke for my MD and
PhD, and discovered a passion for brain tumor research, and quickly realized that
this was my life's calling. Clinically, I specialize in neuropathology. While
Roger Edwin McLendon
Professor of Pathology
Brain tumors are diagnosed in more than 20,000 Americans annually. The most malignant
neoplasm, glioblastoma, is also the most common. Similarly, brain tumors constitute
the most common solid neoplasm in children and include astrocytomas of the cerebellum,
brain stem and cerebrum as well as medulloblastomas of the cerebellum. My colleagues
and I have endeavored to translate the bench discoveries of genetic mutations and
aberrant protein expressions found in brain tumors to better understan
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