4.7 Article

miR-660-5p-loaded M2 macrophages-derived exosomes augment hepatocellular carcinoma development through regulating KLF3

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INTERNATIONAL IMMUNOPHARMACOLOGY
卷 101, 期 -, 页码 -

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ELSEVIER
DOI: 10.1016/j.intimp.2021.108157

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Hepatocellular carcinoma; MicroRNA-660-5p; Kruppel-like factor 3; M2 macrophages-derived exosomes; Tumorigenesis

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The study revealed higher levels of miR-660-5p and lower levels of KLF3 in HCC tissues. It was found that miR-660-5p targets KLF3. MiR-660-5p-loaded M2-Exo enhance HCC development by downregulating KLF3.
Objective: M2 macrophages (M2) can affect tumor development by secreting various cytokines, including exosomes (Exo). Herein, we intended to explore how microRNA (miR)-660-5p-modified M2-Exo affected hepatocellular carcinoma (HCC) development through regulating Kruppel-like factor 3 (KLF3). Methods: miR-660-5p and KLF3 levels were first measured in clinical HCC tissues. A miR-targeted relation was explored between miR-660-5p and KLF3. M2-Exo were modified by miR-660-5p-related oligonucleotides and cocultured with HepG2 cells to determine their effects on cell proliferation, colony formation, invasion, migration, apoptosis and epithelial-mesenchymal transition (EMT). Xenografted tumors were collected from mice to further verify the in vitro results. Results: Higher miR-660-5p and lower KLF3 levels were examined in HCC. KLF3 was targeted by miR-660-5p. Upregulated miR-660-5p-modified M2-Exo boosted the grwoth and EMT of HepG2 cells, but this effect was impaired by overexpression of KLF3. miR-660-5p-loaded M2-Exo enhanced tumorigenic ability of HCC cells in mice. On the contrary, down-regulated miR-660-5p reduced M2-Exo-mediated promotion of growth of HCC cells in vitro and in vivo. Conclusion: Our study summarizes that miR-660-5p-loaded M2-Exo augment HCC development through downregulating KLF3.

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