发育轨迹和合作的基因组事件定义了BCR::ABL1阳性ALL的分子亚型
Lorenz Bastian1,2, Thomas Beder1, Malwine J Barz1,2
1Medical Department II, Hematology and Oncology, University Hospital Schleswig-Holstein, Kiel, Germany.
Blood
|December 28, 2023
概括
基因表达概况识别了BCR::ABL1阳性急性淋巴细胞白血病 (ALL) 的不同亚型,区分淋巴细胞单独与多系参与. 这些亚型与特定的遗传事件相关,为所有患者提供预后见解.
科学领域:
- 血液学 血液学 血液学
- 分子生物学分子生物学
- 在瘤学瘤学.
背景情况:
- BCR::ABL1阳性急性淋巴细胞白血病 (ALL) 根据不同血液系中BCR::ABL1的存在被分为"仅淋巴细胞"和"多系"亚型.
- 目前的分类依赖于在排序的细胞中直接检测BCR::ABL1,需要复杂的实验程序.
研究的目的:
- 为了调查基因表达概况是否可以准确地区分淋巴细胞单独和多个血统的BCR::ABL1阳性ALL亚型.
- 探索基因表达集群,合作基因组事件和BCR::ABL1-阳性ALL的临床结果之间的相关性.
主要方法:
- 在四个独立的队列中对327名BCR::ABL1-阳性ALL患者进行了转录组分析.
- 在光激活的细胞排序的血液形成区上进行光在位杂交 (FISH),以验证BCR::ABL1血统的参与.
- 合作基因组事件的分析,包括HBS1L删除,单体组7,IKZF1删除,CDKN2A/PAX5删除和超双质.
主要成果:
- 确定了两个主要的基因表达集群,在队列中一致可复制,与明显的BCR::ABL1参与髓状细胞相关 (18/18vs3/16患者).
- 这些子集群与特定的合作基因组事件有关:多系遗传病例与HBS1L删除或单体组 7;淋巴状病例与IKZF1删除或CDKN2A/PAX5删除/高二分化.
- 一个新的HSB1L转录被确定为特定于多系 BCR::ABL1 ALL.
- 总体无病生存期 (DFS) 在主要多系和淋巴细胞群之间是可比的 (3年DFS:70%与61%对比).
- 带有IKZF1缺失的淋巴细胞亚群显示较差的DFS,而超倍体病例显示出更好的结果.
结论:
- 基因表达特征分析可以可靠地推断BCR::ABL1在ALL的造血系中的参与,作为直接系谱分析的替代品.
- 不同的基因表达群体反映了BCR::ABL1-阳性ALL的潜在发育轨迹和合作的基因组事件.
- 这些分子亚型具有预后相关性,指导风险分层,并可能为ALL患者的治疗策略提供信息.
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