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Clinicopathological analysis of UHRF1 expression in medulloblastoma tissues and its regulation on tumor cell proliferation.
Medical Oncology 2016 September
Studies have showed the involvement of ubiquitin-like with PHD and RING finger domains 1 (UHRF1) in tumorigenesis and progression. This study focused on the relationships between UHRF1 and medulloblastoma (MB). Immunostaining and western blotting demonstrated differential expression of UHRF1 in MB tissues and no UHRF1 expression in normal cerebellum tissues. Univariate survival analysis revealed MB patients with high UHRF1 expression had significantly shorter OS and PFS than patients with low UHRF1 (OS p = 0.009, PFS p = 0.003). Multivariate analysis illustrated that UHRF1 expression level is an independent prognostic factor influencing the OS and PFS (OS p = 0.038, PFS p = 0.014). UHRF1 expression levels were significantly different among molecular subgroups of MB (p = 0.003). Down-regulation of UHRF1 by RNAi inhibited proliferation and clonogenic ability of MB cell lines with cell cycle arrest in G1/G2-phase. Meanwhile, cells transfected with lenti-shUHRF1 showed increased p16 expression and location shift of CDK4 in MB cells. These findings indicate UHRF1 may promote cell proliferation and be a potential biomarker that can be used as a prognostic parameter and a therapeutic target for MB.
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