异常单细胞表型和基因型定义的多克隆血细胞在髓瘤的临床影响
Matteo Claudio Da Viá1, Francesca Lazzaroni1, Antonio Matera2
1Fondazione IRCCS Ca' Granda Ospedale Maggiore Policlinico, Milano, Italy.
Blood
|February 26, 2025
概括
多发性骨髓瘤患者的多克隆性血细胞 (pPC) 显示功能受损和炎症表型,影响疾病进展. 鉴定这些pPCs为血细胞失分症和潜在的治疗策略提供了新的见解.
科学领域:
- 免疫学 免疫学 免疫学
- 在瘤学瘤学.
- 遗传学 是一个遗传学.
背景情况:
- 多发性骨髓瘤 (MM) 的发病包括克隆性血细胞 (cPC) 和瘤微环境 (TME).
- 剩余的多克隆性血细胞 (pPCs) 在MM和相关的血细胞失分症中的作用和状态仍然不完全理解.
研究的目的:
- 通过单细胞技术,研究血细胞失光症患者的pPCs的特征和功能状态.
- 在疾病进展和患者结局的背景下,确定pPC变化的临床影响.
主要方法:
- 单细胞RNA测序 (scRNAseq) 和B细胞受体分析在46名患者样本和21名健康供体 (HDs) 上进行.
- 进行了cPC和pPC的基因型鉴定和表征.
- 进行了差异基因表达分析和通路丰富,以比较来自患者和HD的pPC.
- 一个"健康的PC签名"被导出并应用于来自CoMMpass数据集的批量转录组学数据.
主要成果:
- 从意义不明的单克隆性胃病变 (MGUS) 到MM的pPC频率显著下降.
- 患者的pPCs表现出高调自,破坏了TME相互作用,以及由丰富的干扰素相关途径特征的炎症表型.
- 虽然pPC和cPC都表达BCMA,但GPRC5D主要在cPC上升调节.
- 由此产生的"健康的PC签名"预测了CoMMpass队列中明显更好的无进展生存率 (PFS) 和整体生存率 (OS).
结论:
- 对pPCs的基因型,单细胞鉴定揭示了血细胞失分症的关键病原和临床影响.
- 破坏PPC功能和炎症表型与疾病进展和免疫衰竭相关.
- 改变的ppc状态和开发的签名提供了潜在的生物标志物和治疗点.
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