PTPN18 promotes colorectal cancer progression by regulating the c-MYC-CDK4 axis.

PTPN18 promotes colorectal cancer progression by regulating the c-MYC-CDK4 axis.
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PTPN18通过调节c-MYC-CDK4轴促进结直肠癌进展

DOI:
10.1016/j.gendis.2020.08.001
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发表时间:
2021-11
期刊:
影响因子:
6.8
通讯作者:
Du RL
Du RL
中科院分区:
医学2区
文献类型:
--
作者:
Li C;Li SZ;Huang XC;Chen J;Liu W;Zhang XD;Song XM;Du RL

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蛋白酪氨酸磷酸酶非受体 18 型 (PTPN18) 通常在结直肠癌 (CRC) 中高表达,但其在该疾病中的作用仍不清楚。我们证明,PTPN18 过度表达会促进 CRC 细胞的生长和肿瘤发生,而 PTPN18 缺乏会在体外产生相反的结果。此外,异种移植测定表明 PTPN18 缺陷显着抑制体内肿瘤发生。 PTPN18激活MYC信号通路并增强CDK4表达,这与癌细胞的细胞周期和增殖密切相关。最后,我们发现MYC与PTPN18相互作用并增加了MYC的蛋白水平。总之,我们的结果表明 PTPN18 通过稳定 MYC 蛋白水平促进 CRC 发展,进而激活 MYC-CDK4 轴。因此,PTPN18可能成为未来的新治疗靶点。
Protein tyrosine phosphatase non-receptor type 18 (PTPN18) is often highly expressed in colorectal cancer (CRC), but its role in this disease remains unclear. We demonstrated that PTPN18 overexpression promotes growth and tumorigenesis in CRC cells and that PTPN18 deficiency yields the opposite results in vitro. Moreover, a xenograft assay showed that PTPN18 deficiency significantly inhibited tumorigenesis in vivo. PTPN18 activated the MYC signaling pathway and enhanced CDK4 expression, which is tightly associated with the cell cycle and proliferation in cancer cells. Finally, we found that MYC interacted with PTPN18 and increased the protein level of MYC. In conclusion, our results suggest that PTPN18 promotes CRC development by stabilizing the MYC protein level, which in turn activates the MYC-CDK4 axis. Thus, PTPN18 could be a novel therapeutic target in the future.
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