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2016 ; 7
(38
): 61036-61053
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
NUMB negatively regulates the epithelial-mesenchymal transition of
triple-negative breast cancer by antagonizing Notch signaling
#MMPMID27506933
Zhang J
; Shao X
; Sun H
; Liu K
; Ding Z
; Chen J
; Fang L
; Su W
; Hong Y
; Li H
; Li H
Oncotarget
2016[Sep]; 7
(38
): 61036-61053
PMID27506933
show ga
Triple-negative breast cancer (TNBC), an aggressive subtype of breast cancer with
higher rates of early relapse and metastasis, is frequently associated with
aberrant activation of epithelial-mesenchymal transition (EMT). Nonetheless, how
EMT is initiated and regulated during TNBC progression is not well understood.
Here, we report that NUMB is a negative regulator of EMT in both human mammary
epithelial cells and breast cancer cells. Reduced NUMB expression was
significantly associated with elevated EMT in TNBC. Conversely, overexpression of
NUMB strongly attenuated the EMT program and metastasis of TNBC cell lines.
Interestingly, we showed that NUMB employs different molecular mechanisms to
regulate EMT. In normal mammary epithelial cells and breast cancer cells
expressing wild-type p53, NUMB suppressed EMT by stabilizing p53. However, in
TNBC cells, loss of NUMB facilitated the EMT program by activating Notch
signaling. Consistent with these findings, low NUMB expression and high Notch
activity were significantly correlated with the TNBC subtype in patients.
Collectively, these findings reveal novel molecular mechanisms of NUMB in the
regulation of breast tumor EMT, especially in TNBC.
|Animals
[MESH]
|Breast/metabolism
[MESH]
|Cell Line, Tumor
[MESH]
|Cell Movement
[MESH]
|Cell Proliferation
[MESH]
|Epithelial-Mesenchymal Transition
[MESH]
|Female
[MESH]
|Gene Expression Regulation, Neoplastic
[MESH]
|HEK293 Cells
[MESH]
|Humans
[MESH]
|Lentivirus
[MESH]
|Membrane Proteins/*metabolism
[MESH]
|Mice
[MESH]
|Mice, Inbred BALB C
[MESH]
|Mice, Nude
[MESH]
|Neoplasm Metastasis
[MESH]
|Neoplasm Transplantation
[MESH]
|Nerve Tissue Proteins/*metabolism
[MESH]
|Phenotype
[MESH]
|Prognosis
[MESH]
|Receptor, Notch1/*metabolism
[MESH]
|Signal Transduction
[MESH]
|Stem Cells/metabolism
[MESH]
|Triple Negative Breast Neoplasms/*metabolism
[MESH]