Enhancing Hematopoietic Stem Cell Transplantation Efficacy by Mitigating Oxygen Shock.

Enhancing Hematopoietic Stem Cell Transplantation Efficacy by Mitigating Oxygen Shock.
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通过减轻氧休克来增强造血干细胞移植功效。

DOI:
10.1016/j.cell.2015.04.054
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发表时间:
2015-06-18
期刊:
影响因子:
64.5
通讯作者:
Broxmeyer HE
Broxmeyer HE
中科院分区:
生物学1区
文献类型:
--
作者:
Mantel CR;O'Leary HA;Chitteti BR;Huang X;Cooper S;Hangoc G;Brustovetsky N;Srour EF;Lee MR;Messina-Graham S;Haas DM;Falah N;Kapur R;Pelus LM;Bardeesy N;Fitamant J;Ivan M;Kim KS;Broxmeyer HE

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造血干细胞(HSCs)存在于骨髓和脐带血的低氧环境中。然而,基本上所有的HSC研究都是在非生理性环境空气中分离和处理细胞进行的。通过在自然缺氧条件下收集和处理骨髓和脐带血,我们证明了短暂暴露在环境中会降低长期再生的HSC的恢复并增加祖细胞,这种现象我们称之为额外生理性氧休克/应激(EPHOSS)。因此,骨髓和脐带血中的造血干细胞的真实数量经常被低估。我们将ROS的产生和通过亲环素D和P53诱导线粒体通透性转换孔(MPTP)联系起来作为EPHOSS的机制。MPTP抑制剂环孢素A保护小鼠骨髓和人脐血HSCs在空气中收集时不受EPHOSS的影响,从而提高了可移植HSCs的回收率。通过药物手段减少细胞采集和处理过程中的EPHOSS可能在临床上对移植有利。
Hematopoietic stem cells (HSCs) reside in hypoxic niches within bone marrow and cord blood. Yet, essentially all HSC studies have been performed with cells isolated and processed in non-physiologic ambient air. By collecting and manipulating bone marrow and cord blood in native conditions of hypoxia, we demonstrate that brief exposure to ambient oxygen decreases recovery of long-term repopulating HSCs and increases progenitor cells, a phenomenon we term Extra Physiologic Oxygen Shock/Stress (EPHOSS). Thus, true numbers of HSCs in the bone marrow and cord blood are routinely underestimated. We linked ROS production and induction of the mitochondrial permeability transition pore (MPTP) via cyclophilin D and p53 as mechanisms of EPHOSS. MPTP inhibitor Cyclosporine A protects mouse bone marrow and human cord blood HSCs from EPHOSS during collection in air, resulting in increased recovery of transplantable HSCs. Mitigating EPHOSS during cell collection and processing by pharmacological means may be clinically advantageous for transplantation.
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