Blood:一种新的红细胞生成调节模式

2020-06-19 医刀 MedSci原创

巨核细胞TGFβ1将造血干细胞和祖细胞(HSPCs)的数量与对红细胞的需求联系起来;干扰巨核细胞TGFβ1轴可使红细胞生成对低剂量的促红细胞生成素敏感并增加红细胞的输出。

促红细胞生成素(Epo)为成熟的类红细胞前体(EPs)提供主要的生存信号,且对终末促红细胞生成至关重要。尽管如此,祖细胞仍可以在Epo发挥作用之前就不可逆转地向红系分化,但如果并不需要这些祖细胞来维持红细胞(RBC)计数,那这些祖细胞就会白白浪费掉。

近期,研究人员确定了一种新的红细胞生成的模式化组织,并首次证明Epo前模式是通过巨核细胞信号与晚期Epo依赖性红细胞生成耦合在一起的。破坏巨核细胞的Tgfb1可通过扩大祖细胞的Epo前池使造血功能紊乱,并因此触发Epo依赖性红系前体的明显凋亡。

类似地,药理阻断正常小鼠中TGFβ信号增强了Epo前模式,导致Epo敏感性EP凋亡。随后用低剂量Epo进行的治疗在两种模型中均触发了RBC的大量生产。

综上所述,本研究揭示了红细胞生成的模式化调节,并为克服慢性贫血提供了的新策略。

原始出处:

Silvana Di Giandomenico,et al. Megakaryocyte TGFβ1 Partitions Erythropoiesis into Immature Progenitor/Stem Cells and Maturing Precursors. Blood. June 16,2020.

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    2020-10-16 ms5000000426001883

    有点6啊

    0

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    2020-06-19 神盾医疗局局长Jack

    本研究揭示了红细胞生成的模式化调节,并为克服慢性贫血提供了的新策略。

    0

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