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BCL6 gene mutations in transitional cell carcinomas.

H Y Cho1, H S Park, Z Lin

  • 1Department of Pathology, Gachon University of Medicine and Science, Incheon, Korea.

The Journal of International Medical Research
|June 5, 2007
PubMed
Summary
This summary is machine-generated.

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B-cell lymphoma-6 (BCL6) gene mutations were found in 44.7% of transitional cell carcinoma (TCC) cases. Both BCL6 gene mutations and protein over-expression may influence TCC morphological differentiation.

Area of Science:

  • Oncology
  • Molecular Biology
  • Genetics

Background:

  • The B-cell lymphoma-6 (BCL6) gene is a key oncogene initially identified in diffuse large B-cell lymphomas.
  • BCL6 plays a crucial role in cellular processes, including cell differentiation and survival.
  • Understanding BCL6 alterations in other cancers, like transitional cell carcinoma (TCC), is important for therapeutic strategies.

Purpose of the Study:

  • To investigate the frequency and characteristics of BCL6 gene mutations in the 5' non-coding region of TCC.
  • To compare BCL6 gene mutation status with BCL6 protein expression levels determined by immunohistochemistry.
  • To explore the potential role of BCL6 gene mutations and protein over-expression in TCC morphological differentiation.

Main Methods:

  • Analysis of BCL6 gene mutations in the 5' non-coding region using polymerase chain reaction-single-strand conformation polymorphism (PCR-SSCP).

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  • Assessment of BCL6 protein expression via immunohistochemical staining.
  • Correlation of mutation data with histological grade and protein expression levels.

    • Main Results:

    • BCL6 mutations were detected in 44.7% of the 47 analyzed TCC cases.
    • No significant correlation was found between 5' non-coding region mutations and overall tumor histological grade.
    • A higher mutation rate in the E1.12 fragment of BCL6 was observed in tumors with better histological grade.
    • BCL6 gene mutation occurred independently of BCL6 protein over-expression.
    • Both BCL6 gene mutation and protein over-expression were frequently detected in TCC.

    Conclusions:

    • BCL6 gene mutations and protein over-expression are common in transitional cell carcinoma.
    • BCL6 gene mutations, particularly in the E1.12 fragment, may be associated with improved histological grade in TCC.
    • BCL6 gene mutation and protein over-expression might play a significant role in the morphological differentiation of TCC.