Objectives: Melatonin (MT) is a pineal hormone with antineoplastic potential. This study aims to explore the therapeutic potential and mechanism of MT on glioblastoma (GBM).
Methods: A human GBM cell line, LN229, was used to evaluate the function of MT. Cell viability, apoptosis, and migration were detected by CCK-8, flow cytometry, and transwell assays, respectively. The mRNA and protein expressions of specific genes were measured by qRT-PCR and western blot, respectively. The regulatory relationship between miR-16-5p and PIM1 was validated by dual luciferase reporter gene assay. A mouse xenograft model was established to prove the anti-tumor effect and related mechanisms of MT in vivo.
Results: MT inhibited the viability and migration and promoted the apoptosis of LN229 cells in a dose-dependent manner. MiR-16-5p was dose-dependently up-regulated by MT in LN229 cells, negatively regulating its target PIM1. MiR-16-5p inhibitor eliminated the anti-tumor effect of MT in LN229 cells, while si-PIM1 reversed the effect of miR-16-5p inhibitor in MT-treated cells. MT inhibited the tumor growth in vivo and MT-induced PIM1 down-regulation was reversed by miR- 16-5p inhibition in tumor tissues.
Conclusions: MT inhibits the malignant progression of GBM via regulating miR-16-5p-mediated PIM1.
[http://dx.doi.org/10.2174/0929867324666170516123206] [PMID: 28521700]
[http://dx.doi.org/10.2174/1570159X14666161228122115] [PMID: 28503116]
[http://dx.doi.org/10.18632/aging.203561] [PMID: 34580235]
[http://dx.doi.org/10.1146/annurev.pathol.4.110807.092222] [PMID: 18817506]