Cripto-1 expression and its prognostic value in human bladder cancer patients

Tumour Biol. 2015 Feb;36(2):1105-13. doi: 10.1007/s13277-014-2695-1. Epub 2014 Oct 19.

Abstract

Cripto-1 is an important embryonic gene that involved in self-renewal and maintenance of pluripotency of stem cells. Overexpression of Cripto-1 has been found to be correlated with tumorigenesis and may affect tumor recurrence and metastasis. The previous studies indicate that Cripto-1 might be a potential prognostic biomarker for several malignancies. The aim of this study is to examine Cripto-1 expression pattern and clinicopathological significance in human bladder cancer patients. We investigated Cripto-1 expression in 30 paired bladder cancer tissues and corresponding noncancerous bladder tissues using real-time quantitative RT-PCR (qRT-PCR). Moreover, Cripto-1 expression in 130 bladder cancer specimens and bladder cancer T24 and 5637 cells were analyzed using immunohistochemistry and immunofluorescence assays. The recurrence/metastasis-free survival was assessed by Kaplan-Meier method and log-rank test. Cox regression was also used for univariate and multivariate analyses of prognostic factors. The results showed that Cripto-1 expression is increased in bladder cancer tissues and is significantly associated with tumor size (P = 0.005) and tumor grade (P = 0.035). In addition, the expression level of Cripto-1 in bladder cancer was also found to be significantly associated with SRY-related HMG-box gene 2 expression (P = 0.003) and Ki-67 (P = 0.001). Compared with the patients with low Cripto-1 expression, the patients with high Cripto-1 expression had significantly poorer recurrence/metastasis-free survival (P = 0.011). Cox regression showed that Cripto-1 might be an independent prognostic factor for recurrence/metastasis-free survival (P = 0.036). Our findings suggest that high Cripto-1 expression might be involved in the development of bladder cancer and a potentially effective prognostic marker in bladder cancer patients.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Disease-Free Survival
  • Female
  • GPI-Linked Proteins / biosynthesis*
  • GPI-Linked Proteins / genetics
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Intercellular Signaling Peptides and Proteins / biosynthesis*
  • Intercellular Signaling Peptides and Proteins / genetics
  • Kaplan-Meier Estimate
  • Male
  • Middle Aged
  • Neoplasm Proteins / biosynthesis*
  • Neoplasm Proteins / genetics
  • Neoplasm Recurrence, Local / genetics*
  • Neoplasm Recurrence, Local / pathology
  • Prognosis*
  • Urinary Bladder Neoplasms / genetics*
  • Urinary Bladder Neoplasms / pathology

Substances

  • GPI-Linked Proteins
  • Intercellular Signaling Peptides and Proteins
  • Neoplasm Proteins
  • TDGF1 protein, human