Niche TWIST1 is critical for maintaining normal hematopoiesis and impeding leukemia progression.

Niche TWIST1 is critical for maintaining normal hematopoiesis and impeding leukemia progression.
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Niche TWIST1 对于维持正常造血和阻止白血病进展至关重要

DOI:
10.3324/haematol.2018.190652
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发表时间:
2018-12
期刊:
影响因子:
10.1
通讯作者:
Ma X
Ma X
中科院分区:
医学1区
文献类型:
--
作者:
Liu X;Ma Y;Li R;Guo D;Wang N;Zhao Y;Yin J;Ren Q;Lin Y;Ma X

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骨髓微环境调节正常和恶性造血,但潜在的分子机制仍不清楚。使用嵌合小鼠模型,我们证明骨髓微环境中 Twist1 缺失会导致多个生态位细胞的改变以及主要造血干细胞支持因子的表达下调。微环境受到干扰会减少造血干细胞的归巢和保留,损害造血干细胞的自我更新并诱导骨髓偏斜。然而,它会加速 MLL-AF9 白血病的进展,这部分是由 Jagged-2 依赖性 Notch 信号传导介导的。我们的数据首次证明了 TWIST1 在有利于正常造血和阻碍白血病发展方面的关键作用。他们还对骨髓生态位在推动急性髓系白血病发展中的作用提出了新的见解,并提出了利用该生态位来改善白血病治疗的可能的新途径。
The bone marrow microenvironment regulates normal and malignant hematopoiesis, but the underlying molecular mechanisms remain poorly defined. Using a chimeric mice model, we demonstrate that Twist1 deletion in the bone marrow microenvironment results in alteration of multiple niche cells as well as downregulated expression of major hematopoietic stem cell supportive factors. The perturbed microenvironment reduces hematopoietic stem cell homing and retention, impairs hematopoietic stem cell self-renewal and induces myeloid skewing. Nevertheless, it accelerates the progression of MLL-AF9 leukemia, which is partially mediated by Jagged-2-dependent Notch signaling. Our data provide the first demonstration of a pivotal role of TWIST1 in favoring normal hematopoiesis and hampering leukemia development. They also bring new insights into the role of the bone marrow niche in driving the development of acute myeloid leukemia, and suggest possible new avenues, exploiting the niche, to improve leukemia treatments.
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