Abstract
Hepatocellular carcinoma (HCC) is a lethal malignancy with few effective options for therapeutic treatment in its advanced stages. While exosomal LINC00161 has been identified as a potential biomarker for HCC, its regulatory function and clinical values remain largely unknown. LINC00161 expressions in serum-derived exosomes from HCC patients and HCC cells were determined by qRT-PCR. The ability of proliferation, migration, and angiogenesis in HUVECs was assessed by MTT, Transwell, and tube formation. Luciferase reporter assay and AGO2-RIP assay were conducted to explore the interactions among LINC00161, miR-590-3p, and ROCK2. The level of ROCK signal-related proteins was examined by Western blotting and immunohistochemistry (IHC) assay. Subcutaneous tumor growth was observed in nude mice, in which in vivo metastasis was observed following tail vein injection of HCC cells. High levels of LINC00161 were detected in both serum-derived exosomes from HCC patients and the supernatants of HCC cell lines and were significantly associated with poor survival. Functional study demonstrated that exosomal LINC00161 derived from HCC-cells were significantly associated with enhanced proliferation, migration, and angiogenesis in HUVECs in vitro, all of which were effectively inhibited when LINC00161 was sliced with shRNA in HCC-cells. In vivo experiment showed that LINC00161 loss inhibited tumorigenesis and metastasis of HCC. Mechanistic study revealed that exosome-carried LINC00161 directly targeted miR-590-3p and induced its downstream target ROCK2, finally activating growth/metastasis-related signals in HCC. Exosome-carried LINC00161 promotes HCC tumorigenesis through inhibiting miR-590-3p to activate the ROCK2 signaling pathway, suggesting that LINC00161 may be used as potential targets to improve HCC treatment efficiency.
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Change history
19 April 2021
A Correction to this paper has been published: https://doi.org/10.1038/s41417-021-00338-0
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This work was supported by Scientific Research and Innovation Fund of Xinjiang Medical University (NO.XJC2013118).
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Guarantor of integrity of the entire study: Wu-Hui Huang; study concepts: Wu-Hui Huang, Qin-Wen Tai; study design: Wu-Hui Huang, Li-Na You, Lin Xu, Yi Hao; definition of intellectual content: Lin Xu; literature research: Li-Na You; clinical studies: Wen-JiaGuo; experimental studies: Wu-Hui Huang, Wen-JiaGuo; data acquisition: Qiao Zhang; data analysis: Wu-Hui Huang, Qing Tong; statistical analysis: Qiao Zhan, Li-Na You; manuscript preparation: Wu-Hui Huang, Heng Zhang; manuscript editing: Qing Tong; manuscript review: Heng Zhang.
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The study protocol was approved by the Medical Ethics Committee of Shenzhen Hospital of Southern Medical University and all patients provided written informed consent. All experimentations involving animals were carried out in full accordance with the institutional animal welfare guideline and approved by Shenzhen Hospital of Southern Medical University.
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You, LN., Tai, QW., Xu, L. et al. Exosomal LINC00161 promotes angiogenesis and metastasis via regulating miR-590-3p/ROCK axis in hepatocellular carcinoma. Cancer Gene Ther 28, 719–736 (2021). https://doi.org/10.1038/s41417-020-00269-2
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DOI: https://doi.org/10.1038/s41417-020-00269-2
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