RESUMO
BACKGROUND: Despite the major advances in the treatment, the overall survival of osteosarcoma remains poor. MicroRNAs (miRNAs) are involved in tumorigenesis and progression though modulating their target genes. In the present study, the roles of miR-1285-3p in osteosarcoma was investigated. METHODS: Microarray profiling was applied to distinguish the up and down regulated microRNAs in osteosarcoma. Quantitative real-time PCR (qRT-PCR) assay was performed to detect the expression of miR-1285-3p and YAP1 expression. MTT and transwell assays were carried out to determine the cells proliferation and invasion respectively. Moreover, dual luciferase reporter assay was performed to evaluate the binding efficiency between miR-1285-3p and the 3'UTR of YAP1. RESULTS: MiR-1285-3p was down regulated in osteosarcoma tissues and cell lines and the reduction of miR-1285-3p expression predicted a poor overall survival of osteosarcoma patients. Ectopic expression of miR-1285-3p inhibited osteosarcoma cell proliferation, colony formation and invasion. In addition, YAP1 was further demonstrated as a direct target of miR-1285-3p. Moreover, overexpression of YAP1 reversed the inhibitory effects of miR-1285-3p on osteosarcoma cells proliferation and invasion. CONCLUSIONS: MiR-1285-3p which was low expressed in osteosarcoma inhibited the proliferation and invasion of osteosarcoma cells via direct targeting YAP1. These results suggested that miR-1285-3p might be a potential therapeutic targets and biomarker in osteosarcoma.
Assuntos
Proteínas Adaptadoras de Transdução de Sinal/genética , Biomarcadores Tumorais/metabolismo , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/metabolismo , MicroRNAs/metabolismo , Osteossarcoma/diagnóstico , Osteossarcoma/metabolismo , Fosfoproteínas/genética , Regiões 3' não Traduzidas , Biomarcadores Tumorais/genética , Neoplasias Ósseas/genética , Neoplasias Ósseas/patologia , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Regulação para Baixo/genética , Feminino , Expressão Gênica , Humanos , Masculino , MicroRNAs/genética , Invasividade Neoplásica , Osteossarcoma/genética , Osteossarcoma/patologia , Prognóstico , Ligação Proteica , Taxa de Sobrevida , Fatores de Transcrição , Proteínas de Sinalização YAP , Adulto JovemRESUMO
Long noncoding RNA ILF3-AS1 (ILF3-AS1) has been reported to be abnormally expressed in several tumors. However, its expression pattern and function in osteosarcoma have not been investigated. In this study, we showed that ILF3-AS1 expression was significantly up-regulated in both osteosarcoma tissues and cell lines. We first reported that ILF3-AS1 upregulation was induced by nuclear transcription factor SP1. Clinical assays revealed that higher expression of ILF3-AS1 was associated with advanced clinical stage, distant metastasis and shorter overall survival. in multivariate analysis, ILF3-AS1 expression level was found to be an independent prognostic factor for osteosarcoma patients. Functional investigations showed that knockdown of ILF3-AS1 suppressed the proliferation, migration and invasion of osteosarcoma cells, and promoted apoptosis. Bioinformatic software predicted that miR-212 both targeted the 3'-UTR of ILF3-AS1 and SOX5, which was confirmed using luciferase reporter assay, RT-PCR and Western blot. Taken together, ILF3-AS1 displayed its tumor-promotive roles in the progression of osteosarcoma through miR-212/SOX5 axis. Our findings help to elucidate the tumorigenesis of osteosarcoma, and future study will provide a novel therapeutic target for osteosarcoma.
Assuntos
Neoplasias Ósseas/genética , MicroRNAs/genética , Osteossarcoma/genética , RNA Longo não Codificante/genética , Fatores de Transcrição SOXD/genética , Fator de Transcrição Sp1/genética , Neoplasias Ósseas/diagnóstico , Neoplasias Ósseas/patologia , Linhagem Celular Tumoral , Progressão da Doença , Regulação Neoplásica da Expressão Gênica , Humanos , Osteossarcoma/diagnóstico , Osteossarcoma/patologia , Prognóstico , Regulação para CimaRESUMO
OBJECTIVE: To analyze the early clinical effects of total hip arthroplasty(THA) for the treatment of old acetabular fractures. METHODS: From January 2007 to June 2010, thirteen patients with old acetabular fractures were reviewed, including 10 males and 3 females. Ten patients were treated with internal fixation and conservative treatment had been used in three patients. The average Harris Hip Score was used to evaluate therapeutic effects. RESULTS: After operation, all thirteen patients were followed up for one year. Hip X-ray films were taken and prosthesis loosening was not seen on any of the films at the 1st year after operation. The Harris Hip Score improved from preoperative (37.19 +/- 20.12) to postoperative (83.38 +/- 3.33), there was statistically significant difference. CONCLUSION: For reasons of malunion or failure of internal fixation, large and various bone defect, it's difficult to reach the anatomical reduction. THA is a good treatment method, but it needs rich skills and experience compared with ordinary operation.
