Organ-on-a-chip model of vascularized human bone marrow niches.

Organ-on-a-chip model of vascularized human bone marrow niches.
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DOI:
10.1016/j.biomaterials.2021.121245
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发表时间:
2022-01
期刊:
影响因子:
14
通讯作者:
--
中科院分区:
工程技术1区
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--
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骨髓微环境(骨内和血管周围)在正常的骨髓功能和肿瘤细胞休眠等病理过程中都起着重要的作用。由于模型不能在利基水平上剖析动态事件,因此对人类这些事件背后的机制的研究受到了严重限制。利用微流体和干细胞技术,我们提出了一个人体骨髓的3D体外模型,它同时包含血管周围和骨内壁龛,以及动态的、可灌流的血管网络。我们证明我们的模型可以在体内复制骨髓功能,包括CD34+造血干/祖细胞的维持和分化,中性粒细胞(CD66b+)的排出,以及对阿霉素和粒细胞集落刺激因子的利基特异性反应。我们的平台提供了机会,以高空间和时间分辨率加速当前对人类骨髓功能和药物反应的理解。
Bone marrow niches (endosteal and perivascular) play important roles in both normal bone marrow function and pathological processes such as cancer cell dormancy. Unraveling the mechanisms underlying these events in humans has been severely limited by models that cannot dissect dynamic events at the niche level. Utilizing microfluidic and stem cell technologies, we present a 3D in vitro model of human bone marrow that contains both the perivascular and endosteal niches, complete with dynamic, perfusable vascular networks. We demonstrate that our model can replicate in vivo bone marrow function, including maintenance and differentiation of CD34+ hematopoietic stem/progenitor cells, egress of neutrophils (CD66b+), and niche-specific responses to doxorubicin and granulocyte-colony stimulating factor. Our platform provides opportunities to accelerate current understanding of human bone marrow function and drug response with high spatial and temporal resolution.
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