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Blood:经典Notch信号在成人稳定状态下和压力诱导的红细胞生成过程中均是可有可无。

2018-01-18 MedSci MedSci原创

虽然已确定经典Notch信号在胚胎造血干细胞产生和胸腺T细胞发育过程中具有至关重要的作用,但其在成人骨髓(BM)造血中的作用尚不清楚。有一些研究,通过分析Notch信号被抑制的成年小鼠的骨髓祖细胞,来阐明经典Notch信号在祖细胞分化成巨核细胞、红细胞和粒细胞-巨噬细胞系的过程中发挥不同的调控作用。但,上述研究,可能还涉及其他信号通路。现Sara等人特异性敲除成人BM的转录因子重组信号结合蛋白Jκ

虽然已确定经典Notch信号在胚胎造血干细胞产生和胸腺T细胞发育过程中具有至关重要的作用,但其在成人骨髓(BM)造血中的作用尚不清楚。有一些研究,通过分析Notch信号被抑制的成年小鼠的骨髓祖细胞,来阐明经典Notch信号在祖细胞分化成巨核细胞、红细胞和粒细胞-巨噬细胞系的过程中发挥不同的调控作用。

但,上述研究,可能还涉及其他信号通路。现Sara等人特异性敲除成人BM的转录因子重组信号结合蛋白Jκ(Rbpj),Rbpj经典信号通过所有的Notch受体汇聚。

值得注意的是,详细的祖细胞分期证实,经典Notch信号在巨核细胞、红细胞和髓样祖细胞的所有受研究的阶段均完全是可有可无的,无论是在稳定状态还是竞争性BM移植或压力诱导红细胞生成过程中。而且,造血细胞系的关键调控基因的表达和Notch的靶基因均不受BM祖细胞Rbpj缺陷影响。

原始出处:

Sara Duarte,et al.Canonical Notch signaling is dispensible for adult steady-state and stress myelo-erythropoiesis.Blood  2018  :blood-2017-06-788505; doi: https://doi.org/10.1182/blood-2017-06-788505

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    2018-01-20 ymljack

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