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High Expression of Cell Division Cycle 42 Promotes Pancreatic Cancer Growth and Predicts Poor Outcome of Pancreatic Cancer Patients

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Abstract

Background

Cell division cycle 42 (CDC42), an important member of the Rho family, is overexpressed in various human cancers. However, its expression and role in pancreatic cancer (PC) are not well understood.

Aim

The present study was designed to investigate the expression patterns and underlying cellular mechanisms of CDC42 in PC.

Methods

First, immunohistochemical analysis, quantitative real-time polymerase chain reaction (qRT-PCR) and Western blotting were performed to detect CDC42 expression in clinical pancreatic carcinoma and adjacent tissues. Second, differential expression of CDC42 between PC cells and normal cells was evaluated by qRT-PCR and Western blotting. Third, the correlation between CDC42 expression as well as clinicopathological characteristics and patient survival was analyzed. Finally, CDC42 was knocked down to examine its role both in vivo and in vitro.

Results

The results showed significantly increased CDC42 expression in pancreatic tumor tissues compared with adjacent normal tissues, as revealed by qRT-PCR, Western blotting and immunostaining. Compared to PanC-1 cells, CDC42 expression was downregulated in HPDE6-C7 cells as shown by qRT-PCR and Western blotting. High CDC42 expression was observed in 69.2% (83/120) of pancreatic adenocarcinoma patients and was significantly associated with tumor differentiation (p = 0.013), median tumor size (p = 0.005), tumor infiltration (pT stage, p = 0.04), lymph nodal status (pN stage, p = 0.044) and TNM staging (p = 0.003). Multivariate Cox regression analysis revealed CDC42 expression to be an independent predictor of survival of PC patients (HR 3.0, 95% CI 1.60–5.61, p = 0.001). Finally, we found that CDC42 promoted the proliferation of PanC-1 cells both in vivo and in vitro.

Conclusions

Our findings reveal that CDC42 might play an important role in promoting PC development, and the findings suggest that CDC42 might serve as a potential prognostic indicator of PC.

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Acknowledgments

This study was supported by the National Natural Science Foundation of China (81372670 and 81402359) and Scientific Research Program of Shanghai Municipal Commission of Health and Family Planning (201640269 and 2014176). The authors are grateful to the Department of Biochemistry and Molecular Biology, Second Military Medical University, and to Prof. Wang Lianghua for their technical support.

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Correspondence to Qingping Cai or Ronglin Yan.

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The authors declare that there are no conflicts of interest.

Additional information

Dejun Yang, Yu Zhang and Yajun Cheng have contributed equally to this work.

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Yang, D., Zhang, Y., Cheng, Y. et al. High Expression of Cell Division Cycle 42 Promotes Pancreatic Cancer Growth and Predicts Poor Outcome of Pancreatic Cancer Patients. Dig Dis Sci 62, 958–967 (2017). https://doi.org/10.1007/s10620-017-4451-z

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  • DOI: https://doi.org/10.1007/s10620-017-4451-z

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