RESUMO
We aimed to investigate the biological role of miR-367 in uveal melanoma cell growth and migration, and the underlying mechanism responsible. Quantitative real-time polymerase chain reaction was performed to evaluate miR-367 expression in uveal melanoma tissue samples and cell lines. A miR-367 mimic, miR-367 inhibitor, and negative control oligonucleotide were transfected into these cells to investigate the function of this microRNA. In addition, the role of PTEN in miR-367-mediated uveal melanoma cell growth and migration was evaluated. miR-367 was significantly upregulated in uveal melanoma cells and tissue samples (both P < 0.01). Its inhibition suppressed the proliferation, cell cycle transition, and migration of such cells, and increased levels had the opposite effect. PTEN was confirmed to be a target gene of miR-367. More importantly, co-transfection with a PTEN construct lacking the 3'-untranslated region mitigated miR-367 mimic-induced promotion of uveal melanoma cell proliferation and migration. In summary, miR-367 was found to be upregulated in this malignancy, and may promote uveal melanoma cell proliferation and migration, at least in part by regulating PTEN.
Assuntos
Movimento Celular , Proliferação de Células , Melanoma/metabolismo , MicroRNAs/genética , PTEN Fosfo-Hidrolase/metabolismo , Neoplasias Uveais/metabolismo , Estudos de Casos e Controles , Linhagem Celular Tumoral , Regulação Neoplásica da Expressão Gênica , Humanos , Melanócitos/metabolismo , Melanócitos/fisiologia , Melanoma/genética , Melanoma/patologia , MicroRNAs/metabolismo , PTEN Fosfo-Hidrolase/genética , Regulação para Cima , Neoplasias Uveais/genética , Neoplasias Uveais/patologiaRESUMO
The aim of this study was to observe the proliferation of, and cell-cycle changes in, the human lens epithelial cell line HLEC after Toll-like receptor 4 (TLR4) gene silencing. HLEC cells were transfected with four TLR4-short hairpin RNA (shRNA) lentiviral vectors or the control lentivirus (pGCL-GFP-shRP-1, -2, -3, -4, NC). TLR4 silencing was verified in these cells 96 h post-transfection using real-time polymerase chain reaction and western blot. We also observed the change in number of pGCL-GFP-shRP-4-transfected HLEC cells with silenced TLR4 (multiplicity of infection = 10). Cell proliferation was analyzed 48 h after transfection by a standard Cell Counting Kit-8 (CCK-8) assay, and the cell cycle changes were detected by flow cytometry. The number of cells with silenced TLR4 decreased with time. The decrease in TLR4 expression led to decelerated cell proliferation. Cells with silenced TLR4 (for 48 h) were arrested in the G1 phase; that is, the cell cycle was prolonged and cell division was decelerated. Lentivirus-mediated RNA interference effectively silenced TLR4 expression in HLEC cells, which decelerated their proliferation rate and extended the cell cycle.