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  • Title: Identification of miR-199a-5p in serum as noninvasive biomarkers for detecting and monitoring osteosarcoma.
    Author: Zhou G, Lu M, Chen J, Li C, Zhang J, Chen J, Shi X, Wu S.
    Journal: Tumour Biol; 2015 Nov; 36(11):8845-52. PubMed ID: 26069101.
    Abstract:
    Emerging evidence has suggested that circulating microRNAs (miRNAs) in serum/plasma can serve as noninvasive biomarkers for cancer detection; however, little is known about circulating miRNA profiles in osteosarcoma, a primary malignant bone tumor with high morbidity in young adults and adolescents. The objective of this study was to investigate whether circulating miRNAs in serum could be a useful biomarker for detecting osteosarcoma and monitoring tumor dynamics. Serum samples were obtained from 60 patients before surgery, 28 patients after 1 month of surgery, and 60 healthy individuals. The study was divided into three steps: (1) initial screening of the profiles of circulating miRNAs in pooled serum samples from both healthy controls and pre- and postoperative osteosarcoma patients using a TaqMan low-density qPCR array (TLDA); (2) evaluation of miRNA concentration in individual serum samples from 60 preoperative osteosarcoma patients and 60 healthy controls by a quantitative RT-PCR assay; and (3) evaluation of miRNA concentration in paired serum samples from 28 pre- and postoperative osteosarcoma patients by a quantitative RT-PCR assay. The initial analysis showed that concentrations of serum miRNAs were significantly altered between preoperative osteosarcoma patients and healthy controls and between pre- and postoperative osteosarcoma patients. The quantitative RT-PCR assay showed that serum miR-199a-5p concentrations were significantly higher in osteosarcoma patients than in controls. The value of the area under the ROC curve was 0.8606. Serum levels of miR-199a-5p were significantly lower in post- than preoperative samples. The results indicated the potential of circulating miRNAs as novel noninvasive biomarkers for detecting and monitoring osteosarcoma.
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