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Change in expression of cyclin G2 in kidney cancer cell and its significance

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Tumor Biology

Abstract

This study aims to analyze the expression and clinical significance of cyclin G2 (CCNG2) in kidney carcinoma, and the biological effect in its cell line by CCNG2 overexpression. Immunohistochemistry and western blot were used to analyze CCNG2 protein expression in 63 cases of kidney cancer and normal tissues to study the relationship between CCNG2 expression and clinical factors. CCNG2 lentiviral vector and empty vector were respectively transfected into kidney ACHN cell line. During immunohistochemistry, the level of CCNG2 protein expression was found to be significantly lower in kidney cancer tissue than normal tissues (P < 0.05). After Western blot, the relative amount of CCNG2 protein in kidney cancer tissue was respectively found to be significantly lower than in normal tissues (P < 0.05). The level of CCNG2 protein expression was not correlated with gender, age, tumor size, and pathological types (P > 0.05), but it was correlated with lymph node metastasis, clinic stage, and histological grade (P < 0.05). Loss of CCNG2 expression correlated significantly with poor overall survival time by Kaplan–Meier analysis (P < 0.05). The result of biological function show that ACHN cell-transfected CCNG2 had a lower survival fraction, higher percentage of the G0/G1 phases, and lower CDK2 protein expression compared with ACHN cell-untransfected CCNG2 (P < 0.05). CCNG2 expression decreased in kidney cancer and correlated significantly with lymph node metastasis, clinical stage, histological grade, and poor overall survival, suggesting that CCNG2 may play important roles as a negative regulator to kidney cancer ACHN cell by promoting degradation of CDK2.

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Authors and Affiliations

  1. Department of Urinary Surgery, Tangshan Works Hospital, Tangshan, 063000, China

    D. W. Cui

  2. Department of Chemoradiotherapy, Tangshan People’s Hospital, No. 65, Shengli Road, Lunan District, Tangshan, 063000, Hebei Province, China

    G. G. Sun

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

    Y. J. Cheng

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  1. D. W. Cui
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  2. G. G. Sun
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  3. Y. J. Cheng
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Correspondence to G. G. Sun.

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D. W. Cui and G. G. Sun contributed equally to this work.

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Cui, D.W., Sun, G.G. & Cheng, Y.J. Change in expression of cyclin G2 in kidney cancer cell and its significance. Tumor Biol. 35, 3177–3183 (2014). https://doi.org/10.1007/s13277-013-1415-6

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  • DOI: https://doi.org/10.1007/s13277-013-1415-6

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