复发的儿科B系急性淋巴细胞白血病的染色质可访问性景观
Han Wang1, Huiying Sun1, Bilin Liang1
1Pediatric Translational Medicine Institute, Shanghai Children's Medical Center, School of Medicine, Shanghai Jiao Tong University, Shanghai, China.
Nature communications
|October 25, 2023
概括
了解儿科B系急性淋巴细胞白血病 (B-ALL) 中的染色质可访问性,揭示了复发的机制. 这项研究绘制了可访问的染色体区域 (ACR),以发现转录失调,并确定早期复发的子组.
科学领域:
- 基因组学就是基因组学.
- 癌症生物学 癌症生物学
- 表观遗传学 在表观遗传学中,表观遗传学是指表观遗传学.
背景情况:
- 儿科B系急性淋巴细胞白血病 (B-ALL) 的复发仍然是一个重大挑战,大约一半的患者的分子机制尚不清楚.
- 染色体可访问性在基因调节和细胞身份方面发挥着至关重要的作用,但其在复发性B-ALL中的作用尚未得到充分理解.
研究的目的:
- 描述儿科复发性B-ALL中的染色质可访问性景观.
- 确定B-ALL复发和药物反应背后的分子机制.
- 发现用于预测B-ALL早期复发的新生物标志物.
主要方法:
- 在诊断和复发时的儿科B-ALL患者样本中进行全基因组染色质可访问性分析 (例如,ATAC-seq).
- 整合多omics数据 (例如,转录基因组学,表观基因组学) 以确定亚型特定和等位基不平衡的可访问性.
- 在诊断和复发之间对可访问的色素区域 (ACR) 的差异分析,以及与临床结果的相关性 (无复发生存率).
主要成果:
- 与正常B细胞前体相比,在B-ALL中观察到重新连接的可访问色素区域 (ACR),与转录失调相关.
- 在B-ALL中,超过四分之一的ACR被确定在以前静止的区域,在B-ALL亚型中表现出显著的异质性.
- 通过多omics数据集成,确定了特定亚型和异位基因不平衡的染色质可访问性模式.
- 在药物治疗期间染色质可访问性的变化通过分析诊断和复发之间的差异性ACR来表征.
- 对与无复发存活率相关的ACR分析确定了B-ALL的一个亚组,该亚组倾向于早期复发.
结论:
- 染色体可访问性改变是小儿B-ALL瘤发生和药物反应的组成部分.
- 这项研究提供了复发性B-ALL的表观遗传景观的先进,整合性肖像,为疾病机制提供了洞察力.
- 确定与复发和药物反应相关的特定ACR模式可能为向治疗和改进的预后工具铺平道路.
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