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  • New insights in the clinical and translational relevance of miR483-5p in adrenocortical cancer.

New insights in the clinical and translational relevance of miR483-5p in adrenocortical cancer.

Oncotarget (2017-10-17)
Francesca Salvianti, Letizia Canu, Giada Poli, Roberta Armignacco, Cristian Scatena, Giulia Cantini, Alessandra Di Franco, Stefania Gelmini, Tonino Ercolino, Mario Pazzagli, Gabriella Nesi, Massimo Mannelli, Pamela Pinzani, Michaela Luconi
ABSTRACT

Adrenocortical cancer (ACC) is a rare aggressive malignancy. Recent ACC integrated genomics analysis contributed to redefine the risk groups on molecular basis, including tumor microRNAs (miRs), detectable also in the bloodstream. We developed a quantitative real-time (RT) assay for the measurement of miR483 and miR483-5p absolute levels in plasma samples. miR483/miR483-5p levels were evaluated in plasma samples of 27 patients with ACC before surgery and at follow-up. Statistically significant differences in miR483-5p and miR483 levels were found between stage 1/2 and stage 3/4 ACCs in pre-surgery and post-surgery samples. ROC curve analysis of miR483-5p levels gave a prediction of the clinical stage (accuracy 0.917±0.084), with the best cut-off value of 0.221 ng/ml, prognosticating overall and recurrence-free survival. In a multivariate Cox analysis (HR 16.2, 95%CI[1.39-188.6, P<0.026]), miR483-5p was the only variable that significantly predicted recurrence, but not overall survival. In addition, miR483 and miR483-5p levels correlated with the number of circulating tumor cells (CTCs) detected in the same blood samples, independently of the timing of sampling. In conclusion, we demonstrated that miR483-5p absolute plasma levels in ACC patients are powerful molecular markers that may help in the follow-up of patients after surgery and chemotherapy, and contribute to more accurately classify and predict tumor progression.

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Anti-SF-1 Antibody, Upstate®, from rabbit