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The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression

  • Authors:
    • Wei‑Li Gao
    • Guo‑Chao Ye
    • Li‑Wei Liu
    • Lu Wei
  • View Affiliations / Copyright

    Affiliations: Department of General Surgery, Huzhou Central Hospital, Zhejiang University, Huzhou, Zhejiang 313000, P.R. China
    Copyright: © Gao et al. This is an open access article distributed under the terms of Creative Commons Attribution License.
  • Pages: 7661-7668
    |
    Published online on: March 20, 2018
       https://doi.org/10.3892/ol.2018.8305
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Abstract

Rap1 GTPase-activating protein (Rap1GAP) has been reported to serve an important role in various types of cancer by specific stimulation as a negative regulator of Rap1 activity. However, the role of Rap1GAP in colorectal cancer (CRC) has yet to be fully elucidated. The aim of the present study was to investigate the expression of Rap1GAP in CRC tissues and to elucidate its clinical significance. The expression of Rap1GAP, matrix metallopeptidase 9 (MMP‑9) and E‑cadherin in 227 CRC tissues and paired para‑carcinoma tissues was detected by immunohistochemistry. Associations between Rap1GAP expression and clinicopathological characteristics, and between Rap1GAP expression and prognostic value (OS + DFS) in CRC were investigated. Furthermore, associations between Rap1GAP expression and MMP‑9 expression, and between Rap1GAP expression and E‑cadherin expression were also investigated. Rap1GAP expression was markedly downregulated in CRC tissues compared with para‑carcinoma tissues. Decreased expression of Rap1GAP was significantly associated with depth of invasion, lymph node metastasis, advanced Tumor‑Node‑Metastasis stage and a poor prognosis in patients with CRC following surgery. Furthermore, univariate and multivariate analyses revealed that Rap1GAP was an independent poor prognostic factor for disease‑free survival and overall survival. In addition, Rap1GAP expression was negatively associated with MMP‑9 and positively associated with E‑cadherin in 227 CRC samples. In brief, the results of the present study suggested that Rap1GAP may be involved in tumor progression in CRC and may serve as a potential target for prognostic prediction of patients with CRC.
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Copy and paste a formatted citation
Spandidos Publications style
Gao WL, Ye GC, Liu LW and Wei L: The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression. Oncol Lett 15: 7661-7668, 2018.
APA
Gao, W., Ye, G., Liu, L., & Wei, L. (2018). The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression. Oncology Letters, 15, 7661-7668. https://doi.org/10.3892/ol.2018.8305
MLA
Gao, W., Ye, G., Liu, L., Wei, L."The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression". Oncology Letters 15.5 (2018): 7661-7668.
Chicago
Gao, W., Ye, G., Liu, L., Wei, L."The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression". Oncology Letters 15, no. 5 (2018): 7661-7668. https://doi.org/10.3892/ol.2018.8305
Copy and paste a formatted citation
x
Spandidos Publications style
Gao WL, Ye GC, Liu LW and Wei L: The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression. Oncol Lett 15: 7661-7668, 2018.
APA
Gao, W., Ye, G., Liu, L., & Wei, L. (2018). The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression. Oncology Letters, 15, 7661-7668. https://doi.org/10.3892/ol.2018.8305
MLA
Gao, W., Ye, G., Liu, L., Wei, L."The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression". Oncology Letters 15.5 (2018): 7661-7668.
Chicago
Gao, W., Ye, G., Liu, L., Wei, L."The downregulation of Rap1 GTPase-activating protein is associated with a poor prognosis in colorectal cancer and may impact on tumor progression". Oncology Letters 15, no. 5 (2018): 7661-7668. https://doi.org/10.3892/ol.2018.8305
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