在体外动脉静脉囊模型中探索扰乱流量和内皮细胞功能之间的联系
Zhuotao Xiao1, Nicholas A White2, Jun Wen3
1Department of Internal Medicine (Nephrology) and the Einthoven Laboratory for Vascular and Regenerative Medicine, Leiden University Medical Center, Leiden, 2333, ZA, Netherlands; Department of Nephrology, The First Affiliated Hospital of Soochow University, Suzhou, 215000, China.
Acta biomaterialia
|January 26, 2026
概括
这项研究开发了一种体外动脉静脉 (AVF) 模型,以研究血流干扰如何影响内皮细胞 (ECs),揭示了不同血液动力学条件的特定细胞反应.
科学领域:
- 生物医学工程 生物医学工程
- 心血管研究研究心血管研究
- 细胞生物学 细胞生物学
背景情况:
- 动脉静脉 (AVFs) 中的血液流动受到干扰会导致内脏增生 (IH).
- 了解对内皮细胞 (ECs) 的血液动力学影响对于预防AVF衰竭至关重要.
研究的目的:
- 开发和验证一个实验室模型,模拟AVF中的血液动力学条件.
- 研究各种血液动力学特征对内皮细胞行为和功能的影响.
主要方法:
- 构建了一个管状分支AVF模型,具有脉动性流量,以诱导扰乱的流量.
- 利用计算流体动力学 (CFD) 进行血液动力学模拟和可视化.
- 在定制的聚碳酸膜 (PCM) 上培养人静脉内皮细胞 (HUVECs),以精确地映射出血液动力学数据.
主要成果:
- CFD确定了不同的血液动力学区域:高切削应力 (外壁),低/振荡式切削应力 (内壁) 和脉动性流.
- HUVEC与脉动区域的流量保持一致,而另一些显示焦点粘附和葡萄糖变化.
- 观察到基因表达差异:内壁HUVEC具有较低的KLF2/eNOS;外壁HUVEC具有较高的PDGF/TGF-β.
结论:
- 一个体外AVF模型已成功开发和验证,用于评估对ECs的血液动力学影响.
- 该模型允许精确地将CFD衍生的血液动力学与细胞反应相关联.
- 这种体外方法对评估改善EC功能和预防AVF衰竭的干预措施有希望.
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