Journal
JOURNAL OF INTERNATIONAL MEDICAL RESEARCH
Volume 40, Issue 6, Pages 2090-2097Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/030006051204000606
Keywords
CHEMOSENSITIVITY; ENNEKING STAGE; MICRORNA-21 (MIR-21); OSTEOSARCOMA; PROGNOSIS; REAL-TIME REVERSE TRANSCRIPTION-POLYMERASE CHAIN REACTION
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OBJECTIVE: The aim of this study was to investigate the serum level of microRNA (miR)-21 in patients with osteosarcoma and its correlation with chemosensitivity and prognosis. METHODS: miR-21 levels in sera from 65 patients with osteosarcoma and 30 healthy controls were measured by real-time reverse transcription-polymerase chain reaction. Correlations between serum miR-21 and clinicopathological features in patients with osteosarcoma were determined. The prognostic significance of serum miR-21 was assessed using a Cox proportional hazards model. RESULTS: The serum level of miR-21 was significantly higher in patients with osteosarcoma than in control subjects. High serum miR-21 was significantly correlated with advanced Enneking stage and chemotherapeutic resistance. Univariate and multivariate analyses for overall survival showed that upregulation of serum miR-21 was an independent, unfavourable prognostic factor for patients with osteosarcoma (hazard ratio, 2.325). CONCLUSIONS: miR-21 might be a good candidate for a therapeutic target, and a potential biomarker for the prediction of chemotherapeutic sensitivity and prognosis in patients with osteosarcoma.
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