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Nuclear Localization of Robo is Associated with Better Survival in Bladder Cancer

Ulrich Krafft1, Henning Reis2, Marc Ingenwerth2

  • 1Department of Urology, Faculty of Medicine, University Duisburg-Essen, Hufelandstr 55, 45147, Essen, Germany.

Pathology Oncology Research : POR
|July 19, 2018
PubMed

Insights

Nuclear expression of Robo1 and Robo4 in bladder cancer correlates with better prognosis. Conversely, higher gene expression of Slit2 and Robo1/Robo4 in advanced stages suggests a role in bladder cancer progression.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cell Signaling

Background:

  • The Slit-Robo pathway is implicated in various cancers, but its function in bladder cancer remains unclear.
  • Understanding Slit-Robo signaling is crucial for identifying potential therapeutic targets in bladder cancer.

Purpose of the Study:

  • To investigate the expression of Robo1, Robo4, and Slit2 in bladder cancer tissues.
  • To correlate Slit-Robo pathway component expression with bladder cancer stage, grade, and patient prognosis.

Main Methods:

  • Gene expression analysis using reverse transcription quantitative real-time PCR on 92 bladder cancer samples.
  • Immunohistochemical analysis of 149 bladder cancer samples to assess protein expression.
  • Statistical correlation of expression data with clinical and follow-up data.

Main Results:

  • Higher nuclear staining intensity for Robo1 and Robo4 was observed in low-stage and low-grade bladder cancer.
  • Elevated nuclear Robo1 staining was linked to better disease-specific survival (DSS).
  • Increased gene expression of Robo1 and Slit2 was found in advanced bladder cancer stages, with high Slit2 correlating with shorter DSS.

Conclusions:

  • Nuclear expression of Robo1 and Robo4 may indicate a favorable prognosis in bladder cancer.
  • The translocation of Robo1 and Robo4 to the nucleus could be a post-translational regulatory mechanism with antitumor effects.
  • Slit-Robo pathway dysregulation, particularly increased gene expression in advanced stages, might contribute to bladder cancer progression.
Keywords:
AngiogenesisBladder CancerNuclear translocationPrognosisRobo1Robo4Slit2

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