背景介绍
MYC基因属于原癌基因,在伯基特淋巴瘤中发现(Burkitt lymphoma ,BL),包含C-MYC(8号染色体),N-MYC(2号染色体),L-MYC(1号染色体)三种基因。DNA断裂引起MYC基因重排,MYC重排在BL,弥漫性大B细胞淋巴瘤(diffuse large B-cell lymphom-a,DLBCL),B细胞淋巴瘤(B-cell lymphoma)中均会被检测到,MYC重排导致MYC基因扩增失去控制从而加快癌症发展进程。MYC-IGH(t(8;14)(q24;q32))是一种常见的重排形成的融合基因。MYC/IGH/CEP8三色双重融合探针如图所示:
探针描述
临床意义
在疑似伯基特淋巴瘤病例排查中,准确鉴定MYC重排的必要性已经得到了证实,并且长期以来一直是细胞遗传学分析的常规检查部分,在淋巴瘤其他亚型中,对MYC进行重排检测也对疾病诊断有很大的帮助。
参考文献
[1] Philippa C. May, Nicola Foot ,et al. Detection of cryptic and variant IGH-MYC rearrangements in high-grade non-Hodgkin’s lymphoma by fluorescence in situ hybridization: implications for cytogenetic testing. Cancer Genetics and Cytogenetics 198 (2010) 71-75
[2] Davide F. Robbiani, Anne Bothmer,et al. AID Is Required for the Chromosomal Breaks in cmyc that Lead to c-myc/IgH Translocations. Cell 135, 1028–1038, December 12, 2008
[3] K. Yamamoto, K. Yakushijin and M. Ito et al.MYC amplification on double minute chromosomes in plasma cell leukemia with double IGH/CCND1 fusion genes. Cancer Genetics 242 (2020) 35–40