Tissue microRNA-126 expression level predicts outcome in human osteosarcoma

Area of Science:

• Oncology
• Molecular Biology
• Biomarkers

Background:

• MicroRNA-126 (miR-126) is consistently underexpressed in osteosarcoma tissues and cell lines compared to normal controls.
• This suggests a potential role for miR-126 in osteosarcoma development and progression.

Purpose of the Study:

• To quantify miR-126 expression levels in osteosarcoma patients.
• To investigate the association between miR-126 expression and clinicopathological features.
• To evaluate the prognostic value of miR-126 in osteosarcoma.

Main Methods:

• Quantitative reverse transcription polymerase chain reaction (qRT-PCR) was used to determine miR-126 expression in 122 osteosarcoma patients.
• Statistical analyses included Chi-squared test, Kaplan-Meier survival analysis, and multivariate Cox regression.
• Clinicopathological data and survival outcomes were correlated with miR-126 expression levels.

Main Results:

• miR-126 expression was significantly lower in osteosarcoma tissues than in adjacent normal tissues (P=0.001).
• Low miR-126 expression was significantly associated with advanced TNM stage, distant metastasis, and higher tumor grade (P<0.001).
• Patients with low miR-126 expression exhibited significantly shorter overall survival (log-rank test, P=0.008) and miR-126 was an independent predictor of survival (HR=3.102, P=0.018).

Conclusions:

• Down-expression of miR-126 is linked to a poor prognosis in osteosarcoma patients.
• miR-126 may serve as a valuable prognostic biomarker for optimizing clinical treatment strategies in osteosarcoma.