- MALT1, 18q21.31-q21.32, Red
- MALT1, 18q21.31-q21.32, Green
The MALT1 Breakapart probe consists of two green clones (132kb and 306kb) and two red clones (171kb and 228kb), which are positioned on each side of the MALT1 gene.
Extranodal marginal zone B-cell lymphoma (MZBCL) of the Mucosa-Associated Lymphoid Tissue (MALT) type is characterised by two main translocations involving MALT1; t(11;18)(q21;q21.32) and t(14;18)(q32;q21.32)1. Other MALT1 associated translocations are rare1.
However, there are no MALT1 translocations in nodal or splenic lymphomas1. The t(11;18) BIRC3 (Baculoviral IAP repeat containing 3 protein2,3)/MALT1 translocation is present in 18-33% of cases of MALT lymphoma2 and the resulting fusion protein induces NF-κB (nuclear factor kappa-light-chain-enhancer of activated B-cells), resulting in transcriptional activation3. 18% of MALT lymphomas harbour the t(14;18) MALT1/IGH translocation4.
The genetic abnormalities in MALT lymphomas reflect their site of origin. The t(14;18) translocation was most frequently found in MALT1 lymphomas of the parotid gland, liver, skin, and ocular adnexa – sites rare for the t(11;18). However, the pulmonary and gastrointestinal MALT lymphomas show high frequencies of t(11;18) and absence of the t(14;18)1,4.
I first came across Cytocell FISH probes in a previous lab I worked in and I was struck by the quality of the products. Since this time, I have been recommending and introducing Cytocell probes across all application areas — now they are the primary FISH probes used in our lab. They have an excellent range of products and their ready-to-use reagent format saves considerable time. As a matter of fact, at a recent conference there was a discussion about the lack of commercial probes for a particular disorder and I was happy to point the participants in the direction of the Cytocell catalogue, which contains the exact probes required. Elizabeth Benner, Medical Technologist at the University of Arizona Health Network
1. Murga PEM et al., Leukemia 2003;17(11):2225-9
2. Auer IA et al., Ann Oncol 1997;8(10):979-85
3. Lucas PC et al., J Biol Chem 2001;276(22):19012-9
4. Streubel B et al., Blood 2003;101(6):2335-9
- Area of Interest*
This product is intended to be used on Carnoy’s solution (3:1 methanol/acetic acid) fixed haematological samples, or formalin-fixed paraffin-embedded (FFPE) tissues.
*Disease information supported by the literature and is not a reflection of the intended purpose of this product.