학술논문
Identification of two distinct MYC breakpoint clusters and their association with various IGH breakpoint regions in the t(8;14) translocations in sporadic Burkitt-lymphoma.
Document Type
Article
Author
Source
Subject
*BURKITT'S lymphoma
*CHROMOSOMAL translocation
*CHROMOSOMES
*LYMPHOMAS
*ETIOLOGY of diseases
*GENOMICS
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Language
ISSN
0887-6924
Abstract
The chromosomal translocation t(8;14) is the hallmark of Burkitt's-lymphoma (BL) and fuses the proto-oncogene c-MYC to the IGH locus. We analyzed the genomic structure of MYC/IGH fusions derived from a large series of 78 patients with t(8;14) and asked (i) whether distinct breakpoint clusters exist within the MYC gene and (ii) whether any pairwise association between particular IGH and MYC breakpoints exist. Identification of such associations will help elucidate the etiology of the breaks on the MYC locus. Scan statistic analyses revealed two distinct, but large clusters within c-MYC containing 60/78 (77%) of the breakpoints. Clusters 1 and 2 were 560 and 779 bp in length within a 4555 bp breakpoint cluster region. Breaks within IGH switch μ and joining region did not differ with respect to their corresponding MYC breakpoints. However, there was a highly significant correlation between breakpoints 5′ of MYC cluster 1 and fusions to IGH switch γ region and breakpoints downstream of MYC cluster 2 and fusions to IGH switch α region (χ2-test: P<0.005). Chromatin changes governing choice of IGH-Fc region recombination may parallel changes in the MYC gene 5′ region chromatin leading to some degree of coordinated ontological specificity in breakpoint location.Leukemia (2007) 21, 1739–1751; doi:10.1038/sj.leu.2404753; published online 31 May 2007 [ABSTRACT FROM AUTHOR]