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CONTEXT: Quantification of circulating microRNAs (miRNAs) has recently become feasible and reliable, with most efforts focusing on miRNAs overexpressed by cancer cells. OBJECTIVE: Identification of a characteristic circulating miRNAs profile in melanoma patients. METHODS: We conducted a pilot study comprised of unbiased qPCR comparison of serum miRNA profiles between metastatic melanoma patients and healthy donors. RESULTS: Loss of two normal serum-miRNAs, miR-29c and miR-324-3p, is highly indicative of metastatic melanoma. Hierarchical clustering analysis supported the results and clearly distinguished melanoma patients from healthy donors, metastatic colon and renal cancer patients. DISCUSSION AND CONCLUSIONS: This approach is independent of tumor heterogeneity and is expected to have superior biomarker performances.
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Greenberg et al. (2013) studied this question.
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