在儿童B细胞急性淋巴细胞白血病的不同亚型中,终端脱氧核酸转移酶表达
Chih-Hsiang Yu1, Ying-Hui Su2, Shiann-Tarng Jou3
1Institute of Statistical Science Academia Sinica, Taipei, Taiwan; Department of Clinical Laboratory Sciences and Medical Biotechnology, National Taiwan University, Taipei, Taiwan.
Pathology, research and practice
|April 5, 2024
概括
终端脱核样转移酶 (TdT) 阴性与亚洲人群中KMT2A重组的儿科急性淋巴细胞白血病 (ALL) 有关. TdT表达显著影响B细胞ALL患者的生存结果.
科学领域:
- 儿科血液学 瘤学 儿科血液学
- 分子诊断学 分子诊断
- 癌症基因组学 癌症基因组学
背景情况:
- 终端脱核样转移酶 (TdT) 的负面反应通常与KMT2A重组的儿科急性淋巴细胞白血病 (ALL) 相关.
- 这种关联需要进一步调查,特别是在亚洲人群中.
- 了解这些相关性对于完善儿童期诊断和预后策略至关重要.
研究的目的:
- 在亚洲队列中研究TdT表达和KMT2A重组在儿科B细胞ALL (B-ALL) 之间的关联.
- 分析TdT表达对生存结果的预后意义.
- 探索B-ALL.免疫类型标记物与遗传亚型之间的相关性.
主要方法:
- 对331名儿童B-ALL患者的回顾性分析,这些患者按照台湾儿科瘤学小组 (TPOG) 的协议接受治疗.
- 在初始诊断时评估TdT表达水平.
- 在TdT表达,KMT2A重新排列,其他遗传亚型和生存数据 (无事件和整体生存) 之间的相关性分析.
主要成果:
- 在331名B-ALL患者中有12名观察到TdT阴性;其中8人 (66.7%) 患有KMT2A重组.
- 在KMT2A重新排列的B-ALL (n=20) 中,TdT阴性在8例中存在.
- 与TdT阳性患者相比,TdT阴性患者的无事件5年存活率 (46.8%) 和整体存活率 (55.4%) 显着较差,分别为83.8%和86.3%).
- 异常标记物 (CD2,CD56,CD7,CD117) 很少表达和丰富在特定的遗传亚型.
结论:
- 在研究的亚洲人群中,TdT阴性与儿科B-ALL的KMT2A重组有关.
- TdT表达状态是儿童B-ALL.生存的重要预后指标.
- 免疫类型特征与特定的遗传亚型相关,有助于儿童B-ALL的分类和理解.
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