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Ji J, Tang J, Ren P, Cai W, Shen M, Wang Q, Yang X, Chen W. Downregulation of circLIFR exerts cancer-promoting effects on hepatocellular carcinoma in vitro. Front Genet 2022; 13:986322. [PMID: 36176304 PMCID: PMC9513674 DOI: 10.3389/fgene.2022.986322] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/05/2022] [Accepted: 08/15/2022] [Indexed: 11/13/2022] Open
Abstract
Hepatocellular carcinoma (HCC) is one of the most fatal malignant tumors worldwide. Circular RNAs (circRNAs) are a special type of RNA that lacks the 5′ and 3’ ends. The functional roles of circRNAs in HCC remain largely unknown. Using high-throughput sequencing, we found several differentially expressed circRNAs in HCC tissues compared with nearby normal tissues. Among them, circRNA derived from the LIFR gene, named circLIFR, was significantly downregulated in HCC. Intriguingly, circLIFR overexpression in SK-Hep-1 cells promoted cell growth and invasion. RNA pull-down and mass spectrometry detection revealed circLIFR interacting with TANK binding kinase 1 (TBK1). Anti-TBK1 RIP confirmed the interaction between circLIFR and TBK1. TBK1 is a serine/threonine kinase that regulates several signaling pathways, including the NF-κB pathway. TBK1 inhibitors inhibit NF-κB activation. Overexpression of circLIFR overcame the in-hibitory function of TBK1, resulting in the upregulation of several genes, including MMP13, MMP3, VEGF, and MAPK. This study shows that the downregulation of circLIFR in HCC has a can-cer-promoting effect by interacting with TBK1 to promote the activation of downstream NF-κB pathway genes related to cell proliferation, migration, and invasion. This novel finding reveals the diversity of circRNA functions in HCC and provides novel insights into the role of circRNAs.
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Affiliation(s)
- Jingzhang Ji
- Center for Laboratory Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Jialyu Tang
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
- Department of Intervention, Wen Zhou Central Hospital, Wenzhou, China
| | - Ping Ren
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Wenpin Cai
- Department of Laboratory Medicine, Wen Zhou Traditional Chinese Medicine Hospital, Wenzhou, China
| | - Meina Shen
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Qiunan Wang
- Zhejiang Provincial Key Laboratory of Medical Genetics, Key Laboratory of Laboratory Medicine, Ministry of Education, School of Laboratory Medicine and Life Sciences, Wenzhou Medical University, Wenzhou, China
| | - Xiaoyun Yang
- Department of Laboratory Medicine, Ningbo Medical Center Lihuili Hospital, Ningbo, China
| | - Wei Chen
- Center for Laboratory Medicine, The First Affiliated Hospital of Xi’an Jiaotong University, Xi’an, China
- *Correspondence: Wei Chen,
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Long Z, Gong F, Li Y, Fan Z, Li J. Circ_0000285 regulates proliferation, migration, invasion and apoptosis of osteosarcoma by miR-409-3p/IGFBP3 axis. Cancer Cell Int 2020; 20:481. [PMID: 33041662 PMCID: PMC7539413 DOI: 10.1186/s12935-020-01557-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Accepted: 09/14/2020] [Indexed: 12/16/2022] Open
Abstract
Background Circular RNAs (circRNAs) are important regulators in the pathogenesis of diseases and affects the occurrence and development of diseases. However, the role of circRNAs in osteosarcoma (OS) has not been fully elucidated. Methods The expression of circ_0000285, miR-409-3p and insulin-like growth factor binding protein 3 (IGFBP3) was detected using quantitative real-time PCR (qRT-PCR). The protein level of IGFBP3 was measured using western blot. CCK-8 and colony formation assays were used to determine cell proliferation. Flow cytometry was applied to measure cell cycle and cell apoptosis. Transwell assay was used to assess cell invasion and migration. Dual-luciferase reporter assay and RNA Binding Protein Immunoprecipitation (RIP) assay were performed to determine the relationship among circ_0000285, miR-409-3p and IGFBP3. The animal experiments were performed to determine the function of circ_0000285 in vivo. Results In this study, we found that the expression of circ_0000285 was significantly increased in OS tissues and cells and was enriched in the cytoplasm. Knockdown of circ_0000285 inhibited OS growth in vitro and in vivo. Moreover, miR-409-3p was a target miRNA of circ_0000285 and miR-409-3p targets to IGFBP3 in OS. Besides, circ_0000285 could promote proliferation, migration, invasion and inhibit apoptosis of osteosarcoma by miR-409-3p/IGFBP3 axis. Conclusion In this study, circ_0000285 regulated proliferation, migration, invasion and apoptosis of OS cells by miR-409-3p/IGFBP3 axis, implying that circ_0000285 was a potential target for OS therapy.
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Affiliation(s)
- Zhisheng Long
- Department of Orthopaedics, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, No.92, AiGuo Road, Nanchang City, 330006 Jiangxi Province China
| | - Feipeng Gong
- Department of Orthopaedics, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, No.92, AiGuo Road, Nanchang City, 330006 Jiangxi Province China
| | - Yuxu Li
- Department of Orthopaedics, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, No.92, AiGuo Road, Nanchang City, 330006 Jiangxi Province China
| | - Zhiqiang Fan
- Department of Orthopaedics, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, No.92, AiGuo Road, Nanchang City, 330006 Jiangxi Province China
| | - Jingtang Li
- Department of Orthopaedics, Jiangxi Provincial People's Hospital Affiliated to Nanchang University, No.92, AiGuo Road, Nanchang City, 330006 Jiangxi Province China
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