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Prima-1 induces apoptosis in bladder cancer cell lines by activating p53

Camila B Piantino1, Sabrina T Reis, Nayara I Viana

  • 1Laboratory of Medical Investigation, Urology Department - LIM55, Faculdade de Medicina, Universidade de São Paulo, São Paulo, SP, Brazil. camilapiantino@hotmail.com

Clinics (Sao Paulo, Brazil)
|May 7, 2013
PubMed
Abstract

Insights

Prima-1 reactivates tumor suppressor p53 function in bladder cancer cells with p53 mutations, inducing apoptosis. This suggests Prima-1 as a potential therapeutic agent for urothelial carcinomas.

Area of Science:

  • Oncology
  • Molecular Biology
  • Cancer Genetics

Background:

  • Bladder cancer is a common carcinoma, with high-grade muscle-invasive disease often linked to p53 gene mutations.
  • The p53 protein is a crucial tumor suppressor, and its loss of function is a key event in cancer development.
  • Prima-1 is a novel small molecule designed to restore the function of mutant p53.

Purpose of the Study:

  • To investigate the efficacy of Prima-1 in inducing apoptosis in bladder cancer cell lines.
  • To determine if Prima-1 can restore p53 function and promote cancer cell death.

Main Methods:

  • Two bladder cancer cell lines (T24 with p53 mutation, RT4 with wild-type p53) were treated with Prima-1.
  • Apoptosis was assessed by evaluating morphological changes, mitochondrial membrane potential, and the expression of apoptosis-related genes using quantitative real-time PCR (qRT-PCR).

Main Results:

  • Prima-1 reactivated p53 in the T24 cell line (p53 mutation).
  • Apoptosis was induced through increased Bax and Puma expression, caspase cascade activation, and mitochondrial membrane disruption.
  • The apoptotic process occurred in a BAK-independent manner.

Conclusions:

  • Prima-1 successfully restored the transcriptional activity of p53 in bladder cancer cells.
  • Prima-1 shows promise as a potential therapeutic agent for urothelial carcinomas, particularly those with p53 mutations.
  • Further in vivo studies are warranted to evaluate Prima-1 as a novel therapeutic strategy.

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