Tumor suppressor PRSS8 targets Sphk1/S1P/Stat3/Akt signaling in colorectal cancer.

Tumor suppressor PRSS8 targets Sphk1/S1P/Stat3/Akt signaling in colorectal cancer.
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DOI:
10.18632/oncotarget.8511
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发表时间:
2016-05-03
期刊:
影响因子:
--
通讯作者:
Yang W
Yang W
中科院分区:
其他
文献类型:
--
作者:
Bao Y;Li K;Guo Y;Wang Q;Li Z;Yang Y;Chen Z;Wang J;Zhao W;Zhang H;Chen J;Dong H;Shen K;Diamond AM;Yang W

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PRSS 8是一种膜锚定丝氨酸蛋白酶前列腺素,并已显示出与致癌相关。在此,我们发现PRSS 8表达在结直肠腺瘤和腺癌中显著降低。PRSS 8表达降低与大肠癌的临床分期、分化程度低、生存期短有关。此外,PRSS 8的增加导致结直肠癌细胞增殖的抑制,PRSS 8的敲低促进体外细胞增殖,并且过表达PRSS 8延缓裸鼠中的癌细胞生长。机制研究表明,PRSS 8抑制Sphk 1/S1 P/Stat 3/Akt信号通路,在人类结直肠癌和Sphk 1-/−小鼠中,PRSS 8和Sphk 1之间呈负相关。结论:PRSS 8通过抑制Sphk 1/S1 P/Stat 3/Akt信号通路发挥抑癌作用,可作为监测结直肠癌发生和预测预后的生物标志物。
PRSS8 is a membrane-anchored serine protease prostasin and has been shown an association with carcinogenesis. Herein we found that PRSS8 expression was significantly reduced in colorectal adenomas and adenocarcinomas. The decreased PRSS8 was well correlated with clinical stages, poor differentiation and shorter survival time of colorectal cancer. Furthermore, increase of PRSS8 led to the inhibition of colorectal cancer cell proliferation, knockdown of PRSS8 accelerated cell proliferation in vitro, and overexpressing PRSS8 retarded cancer cell growth in nude mice. Mechanistic studies revealed that PRSS8 inhibited Sphk1/S1P/Stat3/Akt signaling pathway, in terms of inverse association between PRSS8 and Sphk1 in human colorectal cancers and in Sphk1-/− mice. In conclusion, PRSS8 acts as a tumor suppressor by inhibiting Sphk1/S1P/Stat3/Akt signaling pathway, and could be used as a biomarker to monitor colorectal carcinogenesis and predict outcomes.
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