轻链逃逸前后的单细胞RNA测序揭示了患者内部具有不同溶骨基因表达的多发性骨髓瘤亚群。

IF 2 Q3 ONCOLOGY
Denis Ohlstrom, Zachary J Walker, Abhishek Pandey, Lorraine N Davis, Krysta L Engel, Zenggang Pan, Peter A Forsberg, Tomer M Mark, Austin E Gillen, Daniel W Sherbenou
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引用次数: 0

摘要

高风险多发性骨髓瘤(MM)是基因组不稳定的,由肿瘤细胞的异质群体组成,随着时间的推移而进化。轻链逃逸(Light chain escape, LCE)是一种临床现象,当轻链与M-spike值分别上升时,表明肿瘤的进化存在差异。我们试图通过进行高深度的转录组学和表型研究来了解LCE。我们对LCE患者在诊断、首次复发和复发/难治性时间点的一系列骨髓活检进行了单细胞RNA测序和体外药物敏感性分析。单细胞RNA测序揭示了不同的转录组亚群,其表型可以通过临床血清轻链和m峰值单独跟踪。通过MMRF CoMMpass和GSE24080数据集评估亚群之间差异表达的基因对预后的普遍影响。值得注意的是,LCE亚群表现出明显的lamp5过表达的基因表达谱,这与溶骨性骨病变的风险相关。体外药敏试验显示不同亚群的药敏差异。拷贝数变异推断表明,LCE的转录组亚群与一个随时间进化的遗传亚克隆有关。我们的研究结果表明多发性骨髓瘤轻链逃逸下的恶性亚群。这些研究表明,LCE和LAMP5基因过表达预示着溶骨性骨病的风险增加和不良预后,这一发现在CoMMpass数据库中轻链逃逸的患者亚群中得到证实。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Single-Cell RNA Sequencing before and after Light Chain Escape Reveals Intrapatient Multiple Myeloma Subpopulations with Divergent Osteolytic Gene Expression.

Significance: scRNA-seq was used to study a patient with high-risk multiple myeloma featuring LCE. LCE was rooted in a transcriptomic subpopulation that corresponded to a genetic subclone and established novel links between LCE and LAMP5 overexpression to osteolysis and prognosis, validated in RNA-seq databases.

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