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The tumor suppressor DLC1 inhibits cancer progression and oncogenic autophagy in hepatocellular carcinoma

Downregulation of deleted in liver cancer 1 (DLC1) is associated with poor prognosis of various cancers, but its functional mechanisms in hepatocellular carcinoma (HCC) remains unclear. In the present study, we investigated the roles of DLC1 in tumor progression and autophagy of HCC. We found that D...

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Published in:Laboratory investigation 2018-08, Vol.98 (8), p.1014-1024
Main Authors: Wu, Hui-Ta, Xie, Cheng-Rong, Lv, Jie, Qi, He-Qiang, Wang, Fei, Zhang, Sheng, Fang, Qin-Liang, Wang, Fu-Qiang, Lu, Yu-Yan, Yin, Zhen-Yu
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creator Wu, Hui-Ta
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Yin, Zhen-Yu
description Downregulation of deleted in liver cancer 1 (DLC1) is associated with poor prognosis of various cancers, but its functional mechanisms in hepatocellular carcinoma (HCC) remains unclear. In the present study, we investigated the roles of DLC1 in tumor progression and autophagy of HCC. We found that DLC1 was frequently downregulated in HCC tissues. Underexpression of DLC1 correlated with AFP level, vascular invasion, poor differentiation, and poor prognosis. In vitro assays revealed that DLC1 not only suppressed the proliferation, migration, and invasion of HCC cells, but also inhibited autophagy of HCC cells. Mechanistic investigation revealed that DLC1 decreased TCF4 expression and the interaction between β-catenin and TCF4, then inactivated Wnt/β-catenin signaling. Additionally, DLC1 suppressed the ROCK1 activity and the dissociation of the Beclin1-Bcl2 complex, thereby inhibiting autophagy of HCC cells. In conclusion, our findings imply that loss of DLC1 contributes to the progression and oncogenic autophagy of HCC. Deleted in liver cancer 1 (DLC1) is frequently down-regulated in hepatocellular carcinoma tissue and correlates with α-fetoprotein levels, vascular invasion, poor differentiation and poor prognosis. The authors show that DLC1 suppresses the proliferation, migration, invasion and autophagy of hepatocellular carcinoma cells through inactivating Wnt/β-catenin signaling and inhibition of the serine/threonine kinase ROCK1.
doi_str_mv 10.1038/s41374-018-0062-3
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Deleted in liver cancer 1 (DLC1) is frequently down-regulated in hepatocellular carcinoma tissue and correlates with α-fetoprotein levels, vascular invasion, poor differentiation and poor prognosis. 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Deleted in liver cancer 1 (DLC1) is frequently down-regulated in hepatocellular carcinoma tissue and correlates with α-fetoprotein levels, vascular invasion, poor differentiation and poor prognosis. The authors show that DLC1 suppresses the proliferation, migration, invasion and autophagy of hepatocellular carcinoma cells through inactivating Wnt/β-catenin signaling and inhibition of the serine/threonine kinase ROCK1.</abstract><cop>United States</cop><pub>Elsevier Inc</pub><pmid>29785050</pmid><doi>10.1038/s41374-018-0062-3</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record>
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source Nature_系列刊
subjects Animals
Autophagy
Autophagy - genetics
Cancer
Carcinogenesis - genetics
Carcinoma, Hepatocellular - genetics
Carcinoma, Hepatocellular - metabolism
Carcinoma, Hepatocellular - pathology
Cell Line, Tumor
Cell proliferation
Cell Proliferation - genetics
Gene Expression Regulation, Neoplastic
GTPase-Activating Proteins - genetics
GTPase-Activating Proteins - metabolism
Hep G2 Cells
Hepatocellular carcinoma
Humans
Liver
Liver cancer
Liver Neoplasms - genetics
Liver Neoplasms - metabolism
Liver Neoplasms - pathology
Male
Mice, Inbred BALB C
Mice, Nude
Phagocytosis
Prognosis
RNA Interference
RNAi Therapeutics - methods
Tumor Burden - genetics
Tumor suppressor genes
Tumor Suppressor Proteins - genetics
Tumor Suppressor Proteins - metabolism
Tumors
Wnt protein
Xenograft Model Antitumor Assays - methods
β-Catenin
title The tumor suppressor DLC1 inhibits cancer progression and oncogenic autophagy in hepatocellular carcinoma
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