Increased expression of SPRY4-IT1 predicts poor prognosis and promotes tumor growth and metastasis in bladder cancer

Int J Clin Exp Pathol. 2015 Feb 1;8(2):1954-60. eCollection 2015.


Introduction: long non-coding RNAs (lncRNAs) are emerging as new regulators in the cancer paradigm, the involvement of lncRNAs in urothelial carcinoma of the bladder (UCB) is just beginning to be studied. In this study, we focused on lncRNA SPRY4-IT1 and investigated its expression pattern, clinical significance, and biological function in UCB.

Methods: SPRY4-IT1 expression in UCB tissues was examined by quantitative Real-time PCR (qRT-PCR) and its correlation with clinicopathological features and patient prognosis was later analyzed. Moreover, in vitro assays were performed to explore its role in bladder cancer progression.

Results: SPRY4-IT1 expression was elevated in UCB tissues, and SPRY4-IT1 levels were highly positively correlated with histological grade, tumor stage, and lymph node metastasis and reduced overall survival. A multivariate analysis showed that SPRY4-IT1 expression is an independent prognostic factor of overall survival in patients with UCB. Additionally, the results of in vitro assays showed that the suppression of SPRY4-IT1 expression in bladder cancer cells significantly inhibit cell proliferation, migration, and invasion.

Conclusions: Our data suggested that lncRNA SPRY4-IT1 is a novel molecule involved in bladder cancer progression, which provide a potential prognostic biomarker and therapeutic target.

Keywords: SPRY4-IT1; invasion; migration; proliferation; urothelial carcinoma of the bladder.

MeSH terms

  • Biomarkers, Tumor / genetics
  • Biomarkers, Tumor / metabolism
  • Cell Line, Tumor
  • Cell Movement
  • Cell Proliferation*
  • Female
  • Gene Expression Regulation, Neoplastic
  • Humans
  • Intracellular Signaling Peptides and Proteins / genetics
  • Intracellular Signaling Peptides and Proteins / metabolism*
  • Male
  • Middle Aged
  • Neoplasm Invasiveness / genetics*
  • Neoplasm Invasiveness / pathology
  • Neoplasm Metastasis / genetics*
  • Neoplasm Metastasis / pathology
  • Nerve Tissue Proteins / genetics
  • Nerve Tissue Proteins / metabolism*
  • Prognosis
  • RNA, Long Noncoding*
  • Up-Regulation
  • Urinary Bladder Neoplasms / genetics
  • Urinary Bladder Neoplasms / metabolism*
  • Urinary Bladder Neoplasms / pathology


  • Biomarkers, Tumor
  • Intracellular Signaling Peptides and Proteins
  • Nerve Tissue Proteins
  • RNA, Long Noncoding
  • SPRY4 protein, human