XL MECOM 3q26 consists of an orange-labeled probe hybridizing proximal to the MECOM gene region at 3q26.2 and a green-labeled probe hybridizing distal to the MECOM gene region also spanning a distal part of the gene region at 3q26.2.

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.

Myelodysplastic syndromes and myeloproliferative disorders are associated with deregulated production of myeloid cells. According to WHO classification (2008), cytogenetic aberrations are observed in about 50% of MDS cases. The most common aberrations are 5q-, 7/7q-, trisomy 8, del(20q), and inv(3) or t(3;3).

Chromosomal translocations involving the EVI1 locus are a recurrent finding in myeloid leukemia and are associated with poor prognosis. Two common recurrent rearrangements affect the 3q26 locus. One is the inv(3)(q21q26) and the translocation t(3;3)(q21;q26), in which EVI1 overexpression is caused by juxtaposition of the EVI1 gene to enhancer elements of the Ribophorin gene at 3q21. EVI1 activation is also observed in the translocations t(3;12)(q26;p13) and t(3;21)(q26;q22) and is due to generation of the fusion genes ETV6/EVI1 and RUNX1/EVI1, respectively.

Clinical Applications

• Acute Myelogenous Leukemia (AML)
• Myelodysplastic Syndrome (MDS)

XL MECOM 3q26 hybridized to lymphocytes. One normal metaphase and one normal interphase are shown.

• Lugthart et al (2008) Blood 111:4329-4337
• De Melo et al (2008) Leukemia 22:434-437
• De Braekeleer et al (2011) Anticancer Res 31:3441-3448

• 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.
• Detection of t(7;12)(q36;p13) in paediatric leukaemia using dual colour fluorescence in situ hybridisation.
• Fluorescence in situ hybridisation assays designed for del(7q) detection uncover more complex rearrangements in myeloid leukaemia cell lines
• 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.