在慢性淋巴细胞白血病中核细胞重新定位
Kristan V Piroeva1, Charlotte McDonald2, Charalampos Xanthopoulos2
1School of Life Sciences, University of Essex, Wivenhoe Park, Colchester CO4 3SQ, United Kingdom.
Genome research
|September 12, 2023
概括
细胞核的定位在慢性淋巴细胞白血病 (CLL) 中发生显著变化,细胞核的重复长度 (NRL) 较短,与疾病的攻击性相关. 这些表观遗传变化为分类患者和潜在监测疾病进展提供了新的途径.
科学领域:
- 表观遗传学和基因组学
- 癌症生物学 癌症生物学
- 染色体结构 染色体结构
背景情况:
- 核细胞的定位对于基因组调节至关重要,控制对DNA的访问.
- 在癌症,特别是慢性淋巴细胞白血病 (CLL) 中,全基因组核细胞占用数据有限.
- 了解CLL中的染色质变化对于破译疾病机制至关重要.
研究的目的:
- 为了进行高分辨率,全基因组的核细胞图的CLL患者与健康个体之间的比较.
- 调查核细胞位的变化及其与CLL亚型和疾病进展的相关性.
- 探索核细胞占用率作为患者分层和疾病监测的生物标志物的潜力.
主要方法:
- 在单基因对分辨率下对全基因组核细胞组进行映射.
- 在CLL患者和对照者之间比较核细胞占用率,核细胞重复长度 (NRL) 和DNA甲基化.
- 核细胞占用数据的主要成分分析 (PCA) 用于样本分类.
主要成果:
- 在CLL中观察到核细胞位的显著变化,包括全球缩短的NRL.
- 与IGHV突变亚型相比,在激进的IGHV未变异的CLL亚型中,缩短的NRL更为明显.
- 核细胞占用率的变化与染色体重塑,减少DNA甲基化,改变转录因子结合 (包括CTCF) 和免疫反应途径相关.
- 核细胞占用模式有效地分类了CLL亚型,并将其与正常对照区分开来,优于DNA甲基化和基因表达数据.
- 核细胞占用率的PCA使患者能够准确地分为CLL亚型.
结论:
- 核细胞的定位在CLL中显著改变,并作为表观遗传放松调节的敏感指标.
- 不同核细胞占用率为剖析CLL病变发生和分层患者提供了一种新而强大的读数.
- 核细胞定位的变化,特别是NRL,可能适用于患者分层和疾病监测中的液体活检.
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