XL BCL2 BA consists of an orange-labeled probe hybridizing proximal to the BCL2 gene region at 18q21.3 and a green-labeled probe hybridizing distal to the BCL2 gene region at 18q21.3.

Probe maps are created in accordance with the intended purpose of the product. Solid colored bars do not necessarily indicate that the probe fully covers the indicated genomic region. Therefore, caution is advised when interpreting results generated through off-label use. Probe map details based on UCSC Genome Browser GRCh37/hg19. Map components not to scale. Further information is available on request.

The BCL2 gene rearrangement can be found in 50% of follicular lymphoma, 23.3% of B-cell lymphoma, and about 15% of diffuse large B-cell lymphoma. A consequence of this translocation is an overexpression of anti-apoptotic protein BCL2, which most likely represents the initial step of malignant transformation.
The majority of rearrangements in BCL2 occur at two distinct chromosomal regions, the major breakpoint cluster region (MBR) in 70% and the minor cluster region in 10% of patient's tumors.
FISH has been shown to be of higher sensitivity and of equivalent specificity when compared to PCR on paraffin-embedded tissue sections.

Clinical Applications

• Non-Hodgkin Lymphomas (NHL)
• Solid Tumors (Solid Tumors)

XL BCL2 BA hybridized to a prostate tissue section. The normal green-orange fusion signal pattern is observed.

• Vaandrager et al (2000) Blood 96:1947-1952
• Godon et al (2003) Leukemia 17:255-259
• Weinberg et al (2007) J Mol Diagn 9:530-537

• Utility and performance of bacterial artificial chromosomes-on-beads assays in chromosome analysis of clinical prenatal samples, products of conception and blood samples.
• A child with multiple congenital anomalies due to partial trisomy 7q22.1 → qter resulting from a maternally inherited balanced translocation: a case report and review of literature.
• Distinct roles of ATM and ATR in the regulation of ARP8 phosphorylation to prevent chromosome translocations.
• Heterogeneous MYCN amplification in neuroblastoma: a SIOP Europe Neuroblastoma Study.
• Immense random colocalization, revealed by automated high content image cytometry, seriously questions FISH as gold standard for detecting EML4-ALK fusion.
• Fluorescence in situ hybridisation assays designed for del(7q) detection uncover more complex rearrangements in myeloid leukaemia cell lines
• Detection of t(7;12)(q36;p13) in paediatric leukaemia using dual colour fluorescence in situ hybridisation.
• A rare case of t(11;22) in a mantle cell lymphoma like B-cell neoplasiaresulting in a fusion of IGL and CCND1: case report.
• Genomic DNA-chip hybridization in t(11;14)-positive mantle cell lymphomas shows a high frequency of aberrations and allows a refined characterization of consensus regions.