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Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice: A Model for Immunotherapy Development
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Induction of Invasive Transitional Cell Bladder Carcinoma in Immune Intact Human MUC1 Transgenic Mice: A Model for Immunotherapy Development

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The interrelationships between Src, Cav-1 and RhoGD12 in transitional cell carcinoma of the bladder

T Qayyum1, G Fyffe, M Duncan

  • 1Institute of Cancer, College of MVLS, University of Glasgow, Western Infirmary, Glasgow G11 6NT, UK.

British Journal of Cancer
|February 23, 2012
PubMed
Abstract

Insights

Activated Src family kinases and downstream proteins indicate a good prognosis in bladder cancer, unlike other tumors. This activation positively correlates with RhoGD12 expression, suggesting a favorable outcome for patients.

Area of Science:

  • Oncology
  • Molecular Biology
  • Biochemistry

Background:

  • Investigating signaling pathways in bladder cancer is crucial for understanding tumor progression.
  • Src family kinases (SFKs), focal adhesion kinase (FAK), caveolin-1 (Cav-1), and RhoGD12 are implicated in various cancers.

Purpose of the Study:

  • To evaluate the expression and activity of SFKs, FAK, Cav-1, and RhoGD12 in bladder cancer patients.
  • To determine the prognostic significance of these molecules in transitional cell carcinoma of the bladder.

Main Methods:

  • Immunohistochemical staining was performed on tumor samples from 58 bladder cancer patients.
  • Expression levels of c-Src, phosphorylated Src (Y419), dephosphorylated Src (Y527), phosphorylated FAK (Y861), Cav-1, and RhoGD12 were quantified using the weighted histoscore method.

Main Results:

  • High membrane expression of dephosphorylated Src (Y527) and phosphorylated Src (Y419) correlated with increased cancer-specific survival.
  • Elevated phosphorylated FAK (Y861) at the membrane also showed association with better survival.
  • Membrane Src Y419 expression was an independent prognostic factor in multivariate analysis.

Conclusions:

  • Contrary to findings in other solid tumors, activated SFKs and downstream signaling proteins are associated with a favorable prognosis in bladder cancer.
  • Activated Src demonstrates a positive relationship with RhoGD12 expression, suggesting a potential interplay in bladder tumor biology.

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