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2017 ; 8
(6
): 9885-9898
Nephropedia Template TP
gab.com Text
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English Wikipedia
Hypoxia-inducible factor prolyl hydroxylase 2 (PHD2) is a direct regulator of
epidermal growth factor receptor (EGFR) signaling in breast cancer
#MMPMID28038470
Kozlova N
; Wottawa M
; Katschinski DM
; Kristiansen G
; Kietzmann T
Oncotarget
2017[Feb]; 8
(6
): 9885-9898
PMID28038470
show ga
Clinical studies in breast cancer suggest important associations between
intratumoral hypoxia, the upregulation of epidermal growth factor receptor (EGFR
or HER1), hypoxia-inducible factor 1? (HIF-1?), and reduced patient survival.
However, direct molecular links between EGFR and the hypoxia signaling system are
not yet established. Since the oxygen sensor hypoxia-inducible factor prolyl
hydroxylase 2 (PHD2) is considered to be the main HIF-1? regulator, we
hypothesized that PHD2 and EGFR may be interconnected at the molecular level. By
analyzing samples from 313 breast cancer patients, we found that EGFR is a first
clinicopathological parameter positively correlating with PHD2. Mechanistically,
we identified PHD2 as a direct binding partner of EGFR and show that PHD2
regulates EGFR stability as well as its subsequent signaling in breast carcinoma
cells. Overall, we introduce for the first time the direct crosstalk between the
oxygen sensor PHD2 and EGFR-mediated tumorigenesis in breast cancer.