Vascular Injury in the Zebrafish Tail Modulates Blood Flow and Peak Wall Shear Stress to Restore Embryonic Circular Network.

Vascular Injury in the Zebrafish Tail Modulates Blood Flow and Peak Wall Shear Stress to Restore Embryonic Circular Network.
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斑马鱼尾的血管损伤调节血流和峰值壁剪应力以恢复胚胎圆网。

DOI:
10.3389/fcvm.2022.841101
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发表时间:
2022
影响因子:
3.6
通讯作者:
Hsiai TK
Hsiai TK
中科院分区:
医学3区
文献类型:
--
作者:
Baek KI;Chang SS;Chang CC;Roustaei M;Ding Y;Wang Y;Chen J;O'Donnell R;Chen H;Ashby JW;Xu X;Mack JJ;Cavallero S;Roper M;Hsiai TK

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机械响应信号通路使连接网络内的血管能够在结构上适应器官系统之间的血流分配。壁剪切应力 (WSS) 调节内皮细胞增殖和动静脉规范。在这里,我们通过在受精后 3 天(dpf)使用尾部截肢来破坏胚胎循环回路(ECL)来研究斑马鱼模型中的血管再生。我们观察到紧邻截肢部位的节段动脉 (SeA) 局部血流量和 WSS 峰值增加。通过血液粘度和心肌收缩力的变化来操纵血流和 WSS,我们发现血管生成的 Notch-ephrinb2 级联在 SeA 中被血流动力学激活,以指导动脉生成和网络重新连接。综上所述,ECL 截肢诱导微血管拓扑结构的变化,以分隔血流并增加 WSS 介导的 Notch-ephrinb2 通路,促进新的血管动脉环形成并恢复微循环。所提出的损伤介导的Notch和血管环形成的机制。
Mechano-responsive signaling pathways enable blood vessels within a connected network to structurally adapt to partition of blood flow between organ systems. Wall shear stress (WSS) modulates endothelial cell proliferation and arteriovenous specification. Here, we study vascular regeneration in a zebrafish model by using tail amputation to disrupt the embryonic circulatory loop (ECL) at 3 days post fertilization (dpf). We observed a local increase in blood flow and peak WSS in the Segmental Artery (SeA) immediately adjacent to the amputation site. By manipulating blood flow and WSS via changes in blood viscosity and myocardial contractility, we show that the angiogenic Notch-ephrinb2 cascade is hemodynamically activated in the SeA to guide arteriogenesis and network reconnection. Taken together, ECL amputation induces changes in microvascular topology to partition blood flow and increase WSS-mediated Notch-ephrinb2 pathway, promoting new vascular arterial loop formation and restoring microcirculation. The proposed mechanism of injury-mediated Notch and vascular loop formation.
血流动力学驱动的斑马鱼脑血管发育修剪
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