Moreover, miR-155 expression was significantly correlated with the expression of proteins of the urokinase-type plasminogen activator (uPA) system (rs = 0.347–0.604, Spearman-Rho) and the tumor tissue level of osteopontin (OPN) in the tumors of STS patients (rs = 0.361). This evidence concerns the gene PLAU and telomere syndrome.