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An Orthotopic Bladder Cancer Model for Gene Delivery Studies
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An Orthotopic Bladder Cancer Model for Gene Delivery Studies

Published on: December 1, 2013

The effect of serotonin and serotonin antagonists on bladder cancer cell proliferation

Emad J Siddiqui1, Majid A Shabbir, Dimitri P Mikhailidis

  • 1Department of Surgery and Department of Clinical Biochemistry, Royal Free Hospital and University College Medical School, University College London, UK. emadsiddiqui@aol.com

BJU International
|February 14, 2006
PubMed
Abstract

Insights

Serotonin (5-hydroxytryptamine, 5HT) increases bladder cancer cell proliferation. However, 5HT(1A) and 5HT(1B) antagonists significantly inhibit this growth, suggesting their potential in bladder cancer treatment.

Area of Science:

  • Oncology
  • Pharmacology
  • Molecular Biology

Background:

  • High-grade bladder cancer is characterized by rapid progression and recurrence.
  • Serotonin (5-hydroxytryptamine, 5HT) signaling pathways are implicated in various cancers.
  • 5HT antagonists have shown inhibitory effects on prostate cancer cell lines.

Purpose of the Study:

  • To investigate the effect of serotonin (5-hydroxytryptamine, 5HT) on high-grade bladder cancer cell (HT1376) proliferation.
  • To evaluate the efficacy of various 5HT receptor antagonists in inhibiting bladder cancer cell growth.

Main Methods:

  • HT1376 cells were treated with 5HT or specific 5HT receptor antagonists (5HT(1A), 5HT(1B), 5HT(1D), 5HT(2), 5HT(3), 5HT(4)).
  • Cell viability was assessed using the crystal violet assay after 72 hours.
  • 5HT receptor subtype expression on cells and tumor tissues was confirmed via immunohistochemistry and Western blot.

Main Results:

  • Serotonin (5HT) significantly increased HT1376 cell proliferation in a dose-dependent manner.
  • 5HT(1A) and 5HT(1B) antagonists demonstrated significant inhibition of bladder cancer cell growth (10% and 93% respectively).
  • Immunohistochemistry and Western blot confirmed the presence of 5HT(1A) and 5HT(1B) receptors on HT1376 cells and bladder cancer tissue.

Conclusions:

  • 5HT(1A) and particularly 5HT(1B) antagonists effectively inhibit bladder cancer cell proliferation.
  • The inhibitory effects are likely mediated through the 5HT(1A) and 5HT(1B) receptors.
  • These findings suggest a potential therapeutic role for 5HT(1A) and 5HT(1B) antagonists in managing bladder cancer.

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