慢性淋巴细胞白血病通常是由多克隆选择过程引起的.
Davide Bagnara1, Andrea N Mazzarello2, Niccolò Cardente3
1Department of Experimental Medicine, University of Genoa, Genoa, Italy; Karches Center for Oncology Research, The Feinstein Institutes for Medical Research, Northwell Health, Manhasset, NY. davide.bagnara@unige.it.
Haematologica
|February 20, 2025
概括
慢性淋巴细胞白血病 (CLL) 诊断往往错过了额外的独特克隆 (ADC). 先进的测序显示,所有CLL患者都有ADC,平均每人12个,表明CLL的多克隆起源.
科学领域:
- 血液学 血液学 血液学
- 免疫学 免疫学 免疫学
- 遗传学 遗传学 是一个
背景情况:
- 慢性淋巴细胞白血病 (CLL) 通常由单一的主导B细胞克隆超过5x10^6/μL诊断出来.
- 之前的研究表明,在CLL中存在额外的独特克隆 (ADC),随着技术进步,检测率正在增加.
研究的目的:
- 为了全面定义CLL患者的ADC的频率和特征.
- 通过高深度测序来研究CLLB细胞群的克隆结构.
主要方法:
- 采用下一代测序 (NGS) 高深度和方法,以最大限度地减少过度计数.
- 从57名CLL患者的循环CD5+B细胞中分析了IGHV-IGHD-IGHJ基因重组.
- 评估淋巴细胞计数和ADCs的纵向持久性.
主要成果:
- 所有57名CLL患者在临床相关的克隆 (CRC) 之外,至少有一个ADC.
- 在有数据的46名患者中,有44名患者的ADC超过1B细胞/μL,平均每名患者有12个ADC.
- 与健康个体相比,ADCs显示了增加的刻板印象重组,与CRCs相似的IGHV使用,突变状态和同型分布.
结论:
- 多个扩展的B细胞克隆的存在是CLL的标志,这表明白血病发生是一个多个克隆的过程.
- ADCs可以代表不同的CLL克隆或单克隆B细胞淋巴细胞瘤 (MBL) 克隆.
- ADCs通常是持久的,并且随着时间的推移,它们的数量可能会增加,这突显了CLL中克隆进化的动态性质.
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