Blood:44802个单个造血干/祖细胞的转录图谱揭示了8种血系细胞的分化过程

2018-03-28 MedSci MedSci原创

中心点:通过对44802份造血干/祖细胞进行单细胞转录分析确定了向9种不同的血系分化的切入点。通过与13815份c-Kit突变细胞进行对比,确定了细胞类型丰度的多效性变化以及潜在的分子特征。摘要:造血干细胞和祖细胞(HSPCs)维持成人血液系统,其失调可导致多种疾病。但是,朝向特定造血系(各类血细胞的祖细胞)的分化过程仍不明确,对全系统性疾病的了解仍很匮乏。Joakim S. Dahlin等人对4

中心点:

通过对44802份造血干/祖细胞进行单细胞转录分析确定了向9种不同的血系分化的切入点。

通过与13815份c-Kit突变细胞进行对比,确定了细胞类型丰度的多效性变化以及潜在的分子特征。

摘要

造血干细胞和祖细胞(HSPCs)维持成人血液系统,其失调可导致多种疾病。但是,朝向特定造血系(各类血细胞的祖细胞)的分化过程仍不明确,对全系统性疾病的了解仍很匮乏。

Joakim S. Dahlin等人对44802份小鼠骨髓HSPCs进行单细胞RNA测序,尝试建立一个从分化起始到8种不同血系(淋巴细胞、巨核细胞、红系细胞、中性粒细胞、单核细胞、嗜酸性粒细胞、肥大细胞和嗜碱性粒细胞的祖细胞)的综合的转录图谱。

研究人员发现嗜碱性粒细胞和肥大细胞有共同的骨髓祖细胞,并在单细胞水平描述了其分子图谱。c-Kit突变(W41/W41)小鼠模型来源的13815份HSPCs的转录谱显示肥大细胞系缺乏明显的切入点,且不随细胞类型丰富度发生整体性偏移。

增殖性缺陷伴随Myc表达下调。潜在的补偿过程包括上调整合应激反应信号通路和下调红系祖细胞的促凋亡基因的表达,为大规模的单细胞转录研究如何在分子表型和数量种群变化之间架起桥粒提供模板。

原始出处

Joakim S. Dahlin,et al.
A single cell hematopoietic landscape resolves eight lineage trajectories and defects in Kit mutant mice.
Blood  2018  :blood-2017-12-821413;  doi: https://doi.org/10.1182/blood-2017-12-821413

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    2018-09-04 mjldent
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    2018-03-30 俅侠
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    2018-03-28 沙漠浪人

    认真对待研究

    0