XL SS18 BA

Break Apart Probe

Order Number
D-6033-100-OG
Package Size
100 µl (10 Tests)
Labels
  
Chromosome
18
Regulatory Status
IVDD

IVDR Certification

MetaSystems Probes has already certified a large part of its portfolio, according to IVDR. For organizational reasons, we currently provide only the IVDD product.

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Product Description

XL SS18 BA

XL SS18 BA consists of an orange-labeled probe hybridizing proximal to the SS18 gene region at 18q11.2 and a green-labeled probe hybridizing distal to the SS18 gene region at 18q11.2.

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.

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Clinical Details

Synovial sarcoma is a highly aggressive and relatively rare soft tissue sarcoma. It often develops in the limbs of adolescents and young adults and comprises about 10-20% of soft tissue sarcomas in this population. The disease is characterized by the balanced translocation t(X;18) resulting in an in-frame fusion of ´synovial sarcoma translocation, chromosome 18´ (SS18) with members of the ´synovial sarcoma, X breakpoint´ family (SSX), located on the X chromosome. The chimeric fusion protein consists of almost the complete SS18 protein, only eight amino acids are missing, with the carboxy terminus of SSX1 or SSX2 and in rare cases SSX4. Several studies have shown that the SS18-SSX chimeric protein is interacting with the ATP-dependent chromatin remodeling complex SWI/SNF, interfering with its proper function. The absence of the der(18) in some cases suggests that it is not mandatory for the maintenance of the tumor. Generally, synovial sarcoma shows a low genetic complexity, about 50% of the cases harbor t(X;18) as a sole aberration. Since cytogenetic analysis of solid tumors is challenging, FISH provides an alternative method for the characterization of the status of SS18-SSX rearrangements.

Clinical Applications

  • Solid Tumors (Solid Tumors)
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Images

XL SS18 BA

XL SA18 BA hybridized to a tissue specimen, two aberrant cells are shown.

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Expected Patterns

Expected Pattern 1

Normal Cell:
Two green-orange colocalization/fusion signals (2GO).

Expected Pattern 2

Aberrant Cell (typical results):
One green-orange colocalization/fusion signal (1GO), one separate green (1G) and orange (1O) signal each resulting from a chromosome break in the relevant locus.

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Literature

  • Shipley et al (1996) Am J Pathol 148:559-567
  • Surace et al (2004) Lab Invest 84:1185-1192
  • Nielsen et al (2015) Cancer Discov 5:124-134

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News

IVDR Certification

MetaSystems Probes has received IVDR certification for our initial 26 fluorescence in situ hybridization (FISH) probes from the notified body, BSI. Achieving this milestone was not without its challenges, and we are delighted to have accomplished IVDR certification for this probe set at an early stage.

IVDR Certification

New Probes Catalog is Online!

 

MetaSystems Probes is pleased to announce the new catalog including new and innovative products and supporting information. A PDF version of the new catalog is available for download here.

New Probes Catalog is Online!