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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 

Structural analysis of PAX7 rearrangements in alveolar rhabdomyosarcoma.

In the pediatric cancer alveolar rhabdomyosarcoma, the common 2;13 and less frequent 1;13 translocations fuse PAX3 and PAX7, respectively, with FKHR to produce chimeric genes. To compare structural features of these rearrangements, we cloned and mapped a 64-kb genomic region containing PAX7 exons 5 through 8. With the use of Southern blot methodology, rearrangements of the 30-kb PAX7 intron 7 were detected in 9 of 9 PAX7-FKHR-positive cases. Similar to our t(2;13) studies, the t(1;13) breakpoints were randomly distributed within the seventh intron. In contrast with the > 90% frequency of reciprocal rearrangements in the t(2;13), reciprocal rearrangements involving the 3' PAX7 region were detected in only 4 of 9 cases. Furthermore, we detected PAX7-FKHR genomic amplification in 10 of 11 cases, in contrast with the < 5% frequency of PAX3-FKHR amplification. The differences in occurrence, reciprocity, and amplification between the PAX3-FKHR and PAX7-FKHR fusions indicate important differences in the mechanism of the two associated chromosomal translocation events.[1]

References

  1. Structural analysis of PAX7 rearrangements in alveolar rhabdomyosarcoma. Fitzgerald, J.C., Scherr, A.M., Barr, F.G. Cancer Genet. Cytogenet. (2000) [Pubmed]
 
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