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2016 ; 7
(24
): 36539-36550
Nephropedia Template TP
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English Wikipedia
p70S6K promotes IL-6-induced epithelial-mesenchymal transition and metastasis of
head and neck squamous cell carcinoma
#MMPMID27174914
Wu D
; Cheng J
; Sun G
; Wu S
; Li M
; Gao Z
; Zhai S
; Li P
; Su D
; Wang X
Oncotarget
2016[Jun]; 7
(24
): 36539-36550
PMID27174914
show ga
Head and neck squamous cell carcinoma (HNSCC) is the fifth most common cancer
worldwide and a common cause of cancer-related death, with a 5-year survival rate
of less than 60%. IL-6 has been suggested to play an important role in cancer
metastasis, but its mechanism in HNSCC has not been fully clarified. p70S6K has
been reported to induce epithelial-mesenchymal transition (EMT) of ovarian
cancer, but its role in HNSCC remains unknown. In this study, we found that
p70S6K and IL-6 were upregulated in high-metastatic HNSCC cell lines that
underwent EMT when compared to paired low-metastatic cell lines. Overexpression
of p70S6K promoted EMT and migration of HNSCC cells, while downregulation of
p70S6K attenuated IL-6-induced EMT and cell migration. Furthermore, IL-6-induced
p70S6K activation was attenuated by inhibitors of the PI3K/Akt/mTOR, MAPK/ERK,
and JAK/STAT3 signaling pathways, suggesting that it located downstream of these
pathways. These findings suggest that p70S6K promotes IL-6-induced EMT and
metastasis of HNSCC. Targeting p70S6K for HNSCC therapy may benefit patients
through the inhibition of tumor growth, as well as metastasis.