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Related Experiment Videos

Monitoring gene expression profile changes in bladder transitional cell carcinoma using cDNA microarray.

Sun Ying-Hao1, Yang Qing, Wang Lin-Hui

  • 1The Department of Urology, Changhai Hospital, the Second Military Medical University, 200433 Shanghai, China. sunyinh@online.sh.cn

Urologic Oncology
|March 20, 2003
PubMed
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This study used cDNA microarrays to analyze gene expression in bladder cancer, identifying 83 differentially expressed genes involved in crucial cellular processes like apoptosis and cell cycle regulation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genomics

Background:

  • Bladder transitional cell carcinoma (TCC) is a significant human cancer.
  • Understanding the molecular basis of TCC pathogenesis is crucial for developing effective therapies.

Purpose of the Study:

  • To detect differential gene expression profiles between normal bladder mucosa and TCC.
  • To identify genes involved in TCC carcinogenesis using a high-throughput method.

Main Methods:

  • Utilized cDNA microarrays with 12,800 human genes spotted on glass slides.
  • Employed reverse transcription to label mRNA from normal and TCC tissues with fluorescent dyes (Cy3 and Cy5).
  • Performed array hybridization, scanned fluorescent signals, computed Cy5/Cy3 ratios, and confirmed results with Northern analysis.

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Main Results:

  • Screened 83 differentially expressed genes (0.65% of total) with expression ratios >4.0 or <0.25.
  • Identified 28 genes with higher expression and 55 with lower expression in cancerous tissues.
  • Found that differentially expressed genes are involved in signal transduction, apoptosis, and cell cycle regulation, with 23 genes being unregistered in GenBank.

Conclusions:

  • cDNA microarrays offer a powerful, quantitative method for analyzing thousands of genes in parallel.
  • This technique effectively identifies genes implicated in TCC development.
  • Defining gene expression alterations via microarrays can reveal molecular derangements and potential therapeutic targets in bladder cancer pathogenesis.