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2018 ; 9
(1
): 1423
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TSPAN15 interacts with BTRC to promote oesophageal squamous cell carcinoma
metastasis via activating NF-?B signaling
#MMPMID29650964
Zhang B
; Zhang Z
; Li L
; Qin YR
; Liu H
; Jiang C
; Zeng TT
; Li MQ
; Xie D
; Li Y
; Guan XY
; Zhu YH
Nat Commun
2018[Apr]; 9
(1
): 1423
PMID29650964
show ga
Beta-transducin repeat containing E3 ubiquitin protein ligase (BTRC) is crucial
for the degradation of I?B?. Our previous transcriptome sequencing analysis
revealed that tetraspanin 15 (TSPAN15) was significantly upregulated in clinical
oesophageal squamous cell carcinoma (OSCC) tissues. Here, we show that high
TSPAN15 expression in OSCC tissues is significantly associated with lymph node
and distant metastasis, advanced clinical stage, and poor prognosis. Elevated
TSPAN15 expression is, in part, caused by the reduction of miR-339-5p. Functional
studies demonstrate that TSPAN15 promotes metastatic capabilities of OSCC cells.
We further show that TSPAN15 specifically interacts with BTRC to promote the
ubiquitination and proteasomal degradation of p-I?B?, and thereby triggers NF-?B
nuclear translocation and subsequent activation of transcription of several
metastasis-related genes, including ICAM1, VCAM1, uPA, MMP9, TNF?, and CCL2.
Collectively, our findings indicate that TSPAN15 may serve as a new biomarker
and/or provide a novel therapeutic target to OSCC patients.