Ptpn11/Shp2 acts as a tumor suppressor in hepatocellular carcinogenesis.

Ptpn11/Shp2 acts as a tumor suppressor in hepatocellular carcinogenesis.
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DOI:
10.1016/j.ccr.2011.03.023
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发表时间:
2011-05-17
期刊:
影响因子:
50.3
通讯作者:
Feng GS
Feng GS
中科院分区:
医学1区
文献类型:
--
作者:
Bard-Chapeau EA;Li S;Ding J;Zhang SS;Zhu HH;Princen F;Fang DD;Han T;Bailly-Maitre B;Poli V;Varki NM;Wang H;Feng GS

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编码酪氨酸磷酸酶 Shp2 的人类基因 PTPN11 可能充当原癌基因,因为在几种类型的白血病中已检测到显性激活突变。在此,我们报道了Shp2的肿瘤抑制功能。肝细胞特异性删除 Shp2 可通过 Stat3 途径促进炎症信号传导和肝脏炎症/坏死,导致老年小鼠再生性增生和肿瘤发展。此外,Shp2 消除显着增强了亚硝酸二乙烯 (DEN) 诱导的肝细胞癌 (HCC) 的发展,而肝细胞中同时删除 Shp2 和 Stat3 可消除这种现象。在人类 HCC 样本的亚组分中检测到 Shp2 表达降低。因此,与显性活性突变体的致白血病作用相反,PTPN11/Shp2在肝脏中具有肿瘤抑制功能。
The human gene PTPN11, which encodes the tyrosine phosphatase Shp2, may act as a proto-oncogene, as dominantly activating mutations have been detected in several types of leukemia. Herein we report a tumor suppressor function of Shp2. Hepatocyte-specific deletion of Shp2 promotes inflammatory signaling through the Stat3 pathway and hepatic inflammation/necrosis, resulting in regenerative hyperplasia and development of tumors in aged mice. Furthermore, Shp2 ablation dramatically enhanced diethylenenitrite (DEN)-induced hepatocellular carcinoma (HCC) development, which was abolished by concurrent deletion of Shp2 and Stat3 in hepatocytes. Decreased Shp2 expression was detected in a sub-fraction of human HCC specimens. Thus, in contrast to the leukemogenic effect of dominant active mutants, PTPN11/Shp2 has a tumor suppressor function in liver.
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