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Expression of Wip1 in Kidney Carcinoma and its Correlation with Tumor Metastasis and Clinical Significance

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Pathology & Oncology Research

Abstract

This study aimed to analyze the expression, clinical significance of proto-oncogene in kidney carcinoma and the biological effect in its cell line by siRNA targeting wild-type p53-induced phosphatase 1 (Wip1). Immunohistochemistry and western blot were respectively used to analyze Wip1 protein expression in 78 cases of kidney cancer and normal tissues to study the relationship between Wip1 expression and clinical factors. Wip1 siRNA was transiently transfected into papillary kidney carcinoma cell by liposome-mediated method and was detected by Quantitative real-time RT-PCR (qRT-PCR) and western blot. MTT assay, cell apoptosis, cell migration and invasion were also conducted as to the influence of the down-regulated expression of Wip1 that might be found on ACHN cells biological effect. The level of Wip1 protein expression was found to be significantly higher in kidney cancer tissue than normal tissues (P < 0.05). There were significant differences between Wip1 expression and lymph node metastasis, clinical stages and tumor differentiation (P < 0.05). Meanwhile, Increased expression of Wip1 was significantly with poor overall survival time by Kaplan-Meier analysis (P < 0.05). qRT-PCR and Western blot showed that ACHN cell transfected Wip1 siRNA had a lower relative expressive content than normal cell (P < 0.05). MTT assay, cell apoptosis, cell cycles demonstrated that ACHN cell transfected Wip1 siRNA had a lower survival fraction, higher cell apoptosis, more percentage of the G0/G1 phases, significant decrease in migration and invasion, and higher P53 and P16 protein expression compared with ACHN cell untransfected Wip1 siRNA (P < 0.05). Wip1 protein was increased in kidney carcinoma, specifically in T stages, lymph node metastasis, clinical stages and tumor differentiation. Wip1 may involved in the biological processes of kidney cancer cell proliferation, apoptosis, and migration and invasion by regulation P53 and P16 protein expression.

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Authors and Affiliations

  1. Department of Chemoradiotherapy, Tangshan People’s Hospital, Tangshan, 063000, China

    G. G. Sun & W. N. Hu

  2. Department of Radiotherapy, The Military General Hospital of Beijing PLA, Beijing, 100700, China

    Y. D. Wang

  3. Department of Radiotherapy, The Fourth Hospital of Hebei Medical University, Shijiazhuang, 050017, China

    Q. Liu

  4. NO.65, Shengli Road, Lunan District, Tangshan, 063000, Hebei Province, China

    W. N. Hu

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  1. G. G. Sun
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  2. Y. D. Wang
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  3. Q. Liu
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  4. W. N. Hu
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Correspondence to W. N. Hu.

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Sun, G.G., Wang, Y.D., Liu, Q. et al. Expression of Wip1 in Kidney Carcinoma and its Correlation with Tumor Metastasis and Clinical Significance. Pathol. Oncol. Res. 21, 219–224 (2015). https://doi.org/10.1007/s12253-014-9811-9

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  • DOI: https://doi.org/10.1007/s12253-014-9811-9

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