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2016 ; 36
(1
): 108-16
Nephropedia Template TP
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English Wikipedia
STAT3 regulates hypoxia-induced epithelial mesenchymal transition in oesophageal
squamous cell cancer
#MMPMID27220595
Cui Y
; Li YY
; Li J
; Zhang HY
; Wang F
; Bai X
; Li SS
Oncol Rep
2016[Jul]; 36
(1
): 108-16
PMID27220595
show ga
Hypoxia plays a key role in tumour initiation and metastasis; one of the
mechanisms is to induce epithelial-mesenchymal transition (EMT). Signal
transducer and activator of transcription 3 (STAT3) is involved in EMT by
regulating the transcriptional regulators of E-cadherin, the biomarker of EMT.
Until now, however, few studies have focused on the effects of STAT3 in
hypoxia-induced EMT in tumour cells. The goal of this study was to investigate
the roles of STAT3 in hypoxia-induced EMT in oesophageal squamous cell carcinoma
(ESCC). The ESCC cells, TE-1 and EC-1, were incubated in normoxia, or in CoCl2,
which was used to mimic hypoxia. With CoCl2, the ESCC cells showed increased
migration and invasion abilities, accompanied with upregulation of HIF-1?, STAT3,
and vimentin, and downregulation of E-cadherin. Knockdown of STAT3 inhibited EMT
of ESCC cells and downregulated HIF-1? in vitro and in vivo. In ChIP assays,
STAT3 bound to the promoter of HIF-1?, suggesting that STAT3 regulates
transcription of HIF-1?. In conclusion, hypoxia induces EMT of ESCC, and STAT3
regulates this process by promoting HIF-1? expression.