BCL10 in malignant lymphomas--an evaluation using fluorescence in situ hybridization

Area of Science:

• Oncology
• Genetics
• Hematology

Background:

• BCL10 is a tumor suppressor gene implicated in malignant lymphoma development.
• Translocations involving BCL10 are observed in some mucosa-associated lymphoid tissue (MALT) lymphomas.
• The precise role of BCL10 in lymphomagenesis requires further investigation.

Purpose of the Study:

• To determine the incidence of BCL10 gene rearrangements in various lymphomas using fluorescence in situ hybridization (FISH).
• To investigate BCL10 gene mutations in lymphoma cases via single-strand conformational polymorphism (SSCP) and sequencing.
• To assess the frequency of BCL10 gene alterations in the development of malignant lymphomas.

Main Methods:

• Fluorescence in situ hybridization (FISH) on 22 malignant lymphoma cases to detect BCL10 rearrangements.
• Single-strand conformational polymorphism (SSCP) analysis of tumor DNA from 57 malignant lymphoma cases.
• Direct sequencing and RT-PCR analysis of BCL10 in selected cases with identified polymorphisms or rearrangements.

Main Results:

• One case of MALT lymphoma showed a t(1;2)(p22;p12) translocation involving BCL10.
• Seven other cases had 1p region abnormalities, but none involved the BCL10 gene.
• No pathogenic mutations were identified in BCL10 at the DNA (0/60) or mRNA (0/12) levels.

Conclusions:

• BCL10 gene rearrangements are uncommon in lymphoma, predominantly occurring in MALT lymphomas.
• Aberrations in the 1p22 region do not invariably involve the BCL10 gene.
• The BCL10 gene does not appear to play a frequent or critical role in general lymphomagenesis due to lack of mutations.