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Yu, Jian; Xu, Qing-guo; Wang, Zhen-guang; Yang, Yuan; Zhang, Ling; Ma, Jin-zhao; Sun, Shu-han; Yang, Fu; Zhou, Wei-ping
Journal of hepatology, June 2018, 2018-06-00, 20180601, Letnik: 68, Številka: 6Journal Article
Display omitted •Circular RNAs in human HCC were identified using RNA-sequencing.•Circular RNA cSMARCA5 was downregulated in HCC and associated with poor prognosis.•Downregulation of cSMARCA5 in HCC was attributed to the upregulation of DHX9.•cSMARCA5 inhibited HCC growth and metastasis both in vitro and in vivo.•cSMARCA5 acted as the sponge of miR-17-3p and miR-181b-5p to upregulate TIMP3. In recent years, circular RNAs (circRNAs) have been shown to have critical regulatory roles in cancer biology. However, the contributions of circRNAs to hepatocellular carcinoma (HCC) remain largely unknown. cSMARCA5 (a circRNA derived from exons 15 and 16 of the SMARCA5 gene, hsa_circ_0001445) was identified by RNA-sequencing and validated by quantitative reverse transcription PCR. The role of cSMARCA5 in HCC progression was assessed both in vitro and in vivo. circRNAs in vivo precipitation, luciferase reporter assay, biotin-coupled microRNA capture and fluorescence in situ hybridization were conducted to evaluate the interaction between cSMARCA5 and miR-17-3p/miR-181b-5p. The expression of cSMARCA5 was lower in HCC tissues, because of the regulation of DExH-Box Helicase 9, an abundant nuclear RNA helicase. The downregulation of cSMARCA5 in HCC was significantly correlated with aggressive characteristics and served as an independent risk factor for overall survival and recurrence-free survival in patients with HCC after hepatectomy. Our in vivo and in vitro data indicated that cSMARCA5 inhibits the proliferation and migration of HCC cells. Mechanistically, we found that cSMARCA5 could promote the expression of TIMP3, a well-known tumor suppressor, by sponging miR-17-3p and miR-181b-5p. These results reveal an important role of cSMARCA5 in the growth and metastasis of HCC and provide a fresh perspective on circRNAs in HCC progression. Herein, we studied the role of cSMARCA5, a circular RNA, in hepatocellular carcinoma. Our in vitro and in vivo data showed that cSMARCA5 inhibits the growth and migration of hepatocellular carcinoma cells, making it a potential therapeutic target.
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JCR | SNIP | JCR | SNIP | JCR | SNIP | JCR | SNIP |
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in: SICRIS
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