PARP12 (ARTD12) suppresses hepatocellular carcinoma metastasis through interacting with FHL2 and regulating its stability.

PARP12 (ARTD12) suppresses hepatocellular carcinoma metastasis through interacting with FHL2 and regulating its stability.
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PARP12 (ARTD12) 通过与 FHL2 相互作用并调节其稳定性来抑制肝细胞癌转移。

DOI:
10.1038/s41419-018-0906-1
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发表时间:
2018-08-28
影响因子:
9
通讯作者:
Wu J
Wu J
中科院分区:
生物学1区
文献类型:
--
作者:
Shao C;Qiu Y;Liu J;Feng H;Shen S;Saiyin H;Yu W;Wei Y;Yu L;Su W;Wu J

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PARP 12是一种单ADP核糖基转移酶,但其功能在很大程度上仍然未知。在这里,我们通过蛋白亲和纯化鉴定了四个半LIM-唯一蛋白2(FHL 2)作为PARP 12的功能伴侣。尽管PARP 12在体外和体内均不能单ADP核糖基化FHL 2,但PARP 12缺陷通过促进其泛素化降低FHL 2的蛋白水平,并增加转化生长因子β 1(TGF-β1)的表达水平,这与PARP 12酶活性无关。我们还提供了证据表明,PARP 12缺陷增加肝细胞癌(HCC)细胞的迁移和侵袭,并通过调节上皮-间质转化过程促进HCC体内转移。这些结果表明PARP 12是一种肿瘤抑制因子,通过调节FHL 2的稳定性和TGF-β1的表达在HCC转移中起重要作用。
PARP12 is a mono-ADP-ribosyltransferase, but its function remains largely unknown. Here, we identified four-and-a-half LIM-only protein 2 (FHL2) as a functional partner of PARP12 through protein affinity purification. Although PARP12 did not mono-ADP-ribosylate FHL2 in vitro and in vivo, PARP12 deficiency decreased the protein level of FHL2 by promoting its ubiquitination and increased the expression level of transforming growth factor beta1 (TGF-β1), which is independent of PARP12 enzymatic activity. We also provided evidence that PARP12 deficiency increased the migration and invasion of hepatocellular carcinoma (HCC) cells and promoted HCC metastasis in vivo by regulating the epithelial–mesenchymal transition process. These results indicated that PARP12 is a tumor suppressor that plays an important role in HCC metastasis through the regulation of FHL2 stability and TGF-β1 expression.
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