Tumor Biology

, Volume 35, Issue 10, pp 10301–10307 | Cite as

Prognostic significance of cyclooxygenase-2 protein in pancreatic cancer: a meta-analysis

  • Di Wang
  • Xiao-Zhong Guo
  • Hong-Yu Li
  • Jia-Jun Zhao
  • Xiao-Dong Shao
  • Chun-Yan Wu
Research Article


We conducted a meta-analysis of relevant cohort studies to investigate the relationships between cyclooxygenase-2 (COX-2) protein and the prognosis of pancreatic cancer. The following electronic databases were searched without language restrictions: MEDLINE (1966∼2013), the Library Database (Issue 12, 2013), EMBASE (1980∼2013), CINAHL (1982∼2013), Web of Science (1945∼2013), and the Chinese Biomedical Database (CBM) (1982∼2013). Meta-analysis was performed using the STATA statistical software. Six cohort studies with a total of 712 pancreatic cancer patients were involved in this meta-analysis. Our findings showed that COX-2-positive patients were significantly associated with a shorter overall survival (OS) than COX-2-negative patients (hazard ratio (HR) = 1.48, 95 % confidence interval (95%CI) = 1.12∼1.85, P < 0.001). A subgroup analysis by ethnicity also revealed that pancreatic cancer patients with an abnormal COX-2 expression exhibited a worse OS than COX-2-negative patients among both Asians and Caucasians (Asians: HR = 1.40, 95%CI = −0.09∼2.89, P = 0.066; Caucasians: HR = 1.49, 95%CI = 1.11∼1.87, P < 0.001, respectively). Our findings provide empirical evidence that abnormal COX-2 expression may be strongly correlated with poor prognosis for patients with pancreatic cancer. Thus, COX-2 protein may be a useful biomarker for pancreatic cancer.


Cyclooxygenase-2 Pancreatic cancer Prognosis Meta-analysis 



We would like to acknowledge the reviewers for their helpful comments on this paper.

Conflicts of interest



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Copyright information

© International Society of Oncology and BioMarkers (ISOBM) 2014

Authors and Affiliations

  • Di Wang
    • 1
  • Xiao-Zhong Guo
    • 1
  • Hong-Yu Li
    • 1
  • Jia-Jun Zhao
    • 1
  • Xiao-Dong Shao
    • 1
  • Chun-Yan Wu
    • 1
  1. 1.Department of GastroenterologyBeifang Hospital of ShenyangShenyangPeople’s Republic of China

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