PMID- 34487732 OWN - NLM STAT- MEDLINE DCOM- 20211206 LR - 20211214 IS - 1090-2422 (Electronic) IS - 0014-4827 (Linking) VI - 408 IP - 2 DP - 2021 Nov 15 TI - ESR1 mediated circ_0004018 suppresses angiogenesis in hepatocellular carcinoma via recruiting FUS and stabilizing TIMP2 expression. PG - 112804 LID - S0014-4827(21)00357-8 [pii] LID - 10.1016/j.yexcr.2021.112804 [doi] AB - Angiogenesis has been certified to account for tumor pathobiology. Circular RNAs (circRNAs) have been demonstrated to be involved in angiogenesis-related diseases, including hepatocellular carcinoma (HCC). Nevertheless, the regulatory roles of most circRNAs remain obscure. This study aims to uncover the function of hsa_circ_0004018 on angiogenesis in HCC. Firstly, quantitative real-time RT-PCR (RT-qPCR) analyzed that circ_0004018 was definitely down-regulated in HCC. Western blot analysis was conducted to detect the protein level of fused protein in sarcoma (FUS) and TIMP metallopeptidase inhibitor 2 (TIMP2). Functional assays were carried out to assess the impacts of circ_0004018 on HCC. From the experimental results, we found that overexpression of circ_0004018 significantly inhibited angiogenesis in HCC. The regulatory mechanism of circ_0004018 in HCC was determined by chromatin immunoprecipitation (ChIP), luciferase reporter assays and RNA immunoprecipitation (RIP) assay. Therefore, we proved that estrogen receptor 1 (ESR1) mediated circ_0004018 regulated TIMP2 by recruiting FUS. A series of rescue assays verified that circ_0004018 participated in angiogenesis in HCC via modulating TIMP2. In summary, this paper disclosed that ESR1 activated circ_0004018 inhibited angiogenesis in HCC via binding to FUS and stabilizing TIMP2 expression. CI - Copyright (c) 2021 Elsevier Inc. All rights reserved. FAU - Wu, Yanli AU - Wu Y AD - Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430030, Hubei, PR China. FAU - Zhang, Mingsheng AU - Zhang M AD - Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430030, Hubei, PR China. FAU - Bi, Xiaojun AU - Bi X AD - Department of Ultrasound, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430030, Hubei, PR China. FAU - Hao, Li AU - Hao L AD - Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430030, Hubei, PR China. FAU - Liu, Rong AU - Liu R AD - Department of Stomatology, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430022, Hubei, PR China. FAU - Zhang, Haiyan AU - Zhang H AD - Department of Oncology, Tongji Hospital, Tongji Medical College, Huazhong University of Science and Technology, Hankou, Wuhan, 430030, Hubei, PR China. Electronic address: zhangchefu1@163.com. LA - eng PT - Journal Article DEP - 20210903 PL - United States TA - Exp Cell Res JT - Experimental cell research JID - 0373226 RN - 0 (ESR1 protein, human) RN - 0 (Estrogen Receptor alpha) RN - 0 (FUS protein, human) RN - 0 (RNA, Circular) RN - 0 (RNA-Binding Protein FUS) RN - 0 (TIMP2 protein, human) RN - 127497-59-0 (Tissue Inhibitor of Metalloproteinase-2) SB - IM MH - Animals MH - Apoptosis/genetics MH - Carcinoma, Hepatocellular/*genetics/pathology MH - Cell Line, Tumor MH - Cell Proliferation/genetics MH - Estrogen Receptor alpha/*genetics MH - Gene Expression Regulation, Neoplastic MH - Humans MH - Liver Neoplasms/genetics/pathology MH - Mice MH - Neovascularization, Pathologic/*genetics/pathology MH - RNA, Circular/*genetics MH - RNA-Binding Protein FUS/*genetics MH - Tissue Inhibitor of Metalloproteinase-2/*genetics MH - Xenograft Model Antitumor Assays OTO - NOTNLM OT - Angiogenesis OT - FUS OT - Hepatocellular carcinoma OT - TIMP2 OT - hsa_circ_0004018 EDAT- 2021/09/07 06:00 MHDA- 2021/12/15 06:00 CRDT- 2021/09/06 20:10 PHST- 2020/08/24 00:00 [received] PHST- 2021/08/22 00:00 [revised] PHST- 2021/08/25 00:00 [accepted] PHST- 2021/09/07 06:00 [pubmed] PHST- 2021/12/15 06:00 [medline] PHST- 2021/09/06 20:10 [entrez] AID - S0014-4827(21)00357-8 [pii] AID - 10.1016/j.yexcr.2021.112804 [doi] PST - ppublish SO - Exp Cell Res. 2021 Nov 15;408(2):112804. doi: 10.1016/j.yexcr.2021.112804. Epub 2021 Sep 3.