Netrin-1 suppresses the MEK/ERK pathway and ITGB4 in pancreatic cancer.
Netrin-1 suppresses the MEK/ERK pathway and ITGB4 in pancreatic cancer.
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Netrin-1在胰腺癌中抑制MEK/ERK途径和ITGB4。
DOI:
10.18632/oncotarget.8348
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发表时间:
2016-04-26
期刊:
影响因子:
--
通讯作者:
Liu D
中科院分区:
文献类型:
--
作者:
An XZ;Zhao ZG;Luo YX;Zhang R;Tang XQ;Hao D;Zhao X;Lv X;Liu D
The axon guidance factor netrin-1 promotes tumorigenesis in multiple types of cancers, particularly at their advanced stages. Here, we investigate whether netrin-1 is involved in the in vivo growth of pancreatic adenocarcinoma. We show that netrin-1 is significantly under-expressed in stage-I/II pancreatic ductal adenocarcinoma (PDAC). Netrin-1 over-expression effectively arrests the growth of xenografted PDAC cells without decreasing cell proliferation or increasing apoptosis in two-dimensional cultures in vitro. Integrin-beta4 (ITGB4) expression is significantly reduced, and ITGB4-knockdown mimics the tumor-suppressive effect of netrin-1, implying that ITGB4 is a main target of netrin-1 in constraining PDAC. We further show that netrin-1 signals to UNC5B/FAK to stimulate nitric oxide production, which promotes PP2A-mediated inhibition of the MEK/ERK pathway and decreases phosphorylated-c-Jun recruitment to the ITGB4 promoter. Our findings suggest that netrin-1 can suppress the growth of PDAC and provide a mechanistic insight into this suppression.
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