Abstract
MiR-23a-3p has been shown to promote liver cancer cell growth and metastasis and regulate that of chemosensitivity. Protocadherin17 (PCDH17) is a tumor suppressor gene and plays an essential part in cell cycle of hepatocellular carcinoma (HCC). This study aimed at evaluating the effects of miR-23a-3p and PCDH17 on HCC cell cycle and underlining the mechanism. The level of miR-23a-3p was up-regulated, while PCDH17 level was down-regulated in HCC tissues compared to adjacent tissues. For the in vitro studies, high expression of miR-23a-3p down-regulated PCDH17 level; increased cell viability; promoted G1/S cell cycle transition; up-regulated cyclin D1, cyclin E, CDK2, CDK4, p-p27, and p-RB levels; and down-regulated the expression of p27. Dual luciferase reporter assay suggested PCDH17 was a target gene of miR-23a-3p. MiR-23a-3p inhibitor and PCDH17 siRNA led to an increase in cell viability and the number of cells in the S phase and up-regulated cyclin D1 and cyclin E levels, compared with miR-23a-3p inhibitor and NC siRNA group. For the in vivo experiments, high expression of miR-23a-3p promoted tumor growth and reduced PCDH17 level in the cytoplasm. These results indicated that high expression of miR-23a-3p might promote G1/S cell cycle transition by targeting PCDH17 in HCC cells. The miR-23a-3p could be considered as a molecular target for HCC detection.
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This study was funded by a grant from the Special Project for Health Care of Jilin Province Provincial Department of Finance.
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Key Points
• High expression of miR-23a-3p promoted G1/S cell cycle transition.
• Dual luciferase reporter assay suggested PCDH17 was a target gene of miR-23a-3p.
• MiR-23a-3p inhibitor and PCDH17 siRNA up-regulated cyclin D1 and cyclin E levels.
• High expression of miR-23a-3p promoted tumor growth and reduced PCDH17 level
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Fig. S1
Effect of miR-23a-3p on Hep3B and HepG2 cells. After transfection for 48 h, the miR-23a-3p level of Hep3B (a) and HepG2 (b) cells was detected with RT-qPCR. Results were present as mean ± SD (n = 3). ***P < 0.001 vs. the NC mimics group; ###P < 0.001 vs. the NC inhibitor group (PNG 20 kb)
Fig. S2
Effect of PCDH17 on Hep3B and HepG2 cells. After transfection for 48 h, the expression of PCDH17 was detected in Hep3B (a) and HepG2 (b) cells with western blotting. β-actin was used as internal reference. Results were present as mean ± SD (n = 3). *P < 0.05 and **P < 0.01 vs. the NC siRNA groups; ###P < 0.001 vs. the empty vector groups (PNG 84 kb)
Fig. S3
Effect of PCDH17 on cell cycle of HCC cells. a Cell viability was detected by CCK-8 assay. b After transfection for 48 h, cell cycle was evaluated with flow cytometry. Results were present as mean ± SD (n = 3). *P < 0.05 and **P < 0.01 vs. the NC siRNA group; #P < 0.05 and ##P < 0.01 vs. the empty vector group (PNG 158 kb)
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Xiang, Y., Yang, Y., Lin, C. et al. MiR-23a-3p promoted G1/S cell cycle transition by targeting protocadherin17 in hepatocellular carcinoma. J Physiol Biochem 76, 123–134 (2020). https://doi.org/10.1007/s13105-020-00726-4
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DOI: https://doi.org/10.1007/s13105-020-00726-4