Abstract
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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Acknowledgments
This study was supported by the Research Special Fund for Public Welfare Industry of Health (201402008), Shanghai Municipal Commission of Health and Family Planning (20124354).
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Zhen-Yu Zhang, Jia-Jun Cai and Jin Hong have contributed equally to this work.
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Supplementary Figure 1
UHRF1 expression among molecular subgroups of MB The proportion of high UHRF1 expression in WNT subtype was lower than the other subgroups (p = 0.003) (TIFF 32 kb)
Supplementary Figure 2
Prognostic value of UHRF1 expression in molecular and histological subgroups of MB UHRF1 expression had prognostic significance in WNT subgroup (OS p = 0.008, PFS p = 0.004) and CMB (OS p = 0.022, PFS p = 0.004), but not in SHH subtype, non-SHH/WNT subtype, DMB and AMB (TIFF 1242 kb)
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Zhang, ZY., Cai, JJ., Hong, J. et al. Clinicopathological analysis of UHRF1 expression in medulloblastoma tissues and its regulation on tumor cell proliferation. Med Oncol 33, 99 (2016). https://doi.org/10.1007/s12032-016-0799-8
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DOI: https://doi.org/10.1007/s12032-016-0799-8