Journal
JOURNAL OF ORTHOPAEDIC RESEARCH
Volume 32, Issue 5, Pages 695-701Publisher
WILEY
DOI: 10.1002/jor.22589
Keywords
chordoma; miR-1; Met; prognostic biomarker
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Funding
- Stephan L. Harris Fund
- Gattegno and Wechsler Funds
- Chordoma Foundation
- Sarcoma Foundation of America (SFA)
- National Cancer Institute (NCI)/National Institutes of Health (NIH) [UO1, CA151452-01]
- Academic Enrichment Fund of MGH Orthopedic Surgery
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Reliable prognostic biomarkers for chordoma have not yet been established. Recent studies revealed that expression of miRNA-1 (miR-1) is frequently downregulated in several cancer types including chordoma. The goal of this follow-up study is to investigate the expression of miR-1 as a prognostic biomarker and further confirm the functional role of miR-1 in chordoma cell growth and proliferation. We determined the relative expression levels of miR-1 and Met in chordoma tissue samples and correlated those to clinical variables. The results showed that miR-1 was downregulated in 93.7% of chordoma tissues and expression was inversely correlated with Met expression. miR-1 expression levels also correlated with clinical prognosis. To characterize and confirm the functional role of miR-1 in the growth and proliferation of chordoma cells, miR-1 precursors were stably transfected into chordoma cell lines UCH-1 and CH-22. Cell Proliferation Assay and MTT were used to evaluate cell growth and proliferation. Restoring expression of miR-1 precursor decreased cell growth and proliferation in UCH-1 and CH-22 cells. These results indicate that suppressed miR-1 expression in chordoma may in part be a driver for tumor growth, and that miR-1 has potential to serve as prognostic biomarker and therapeutic target for chordoma patients. (c) 2014 Orthopaedic Research Society. Published by Wiley Periodicals, Inc. J Orthop Res 32:695-701, 2014.
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