Ventilation-Like Mechanical Strain Modulates the Inflammatory Response of BEAS2B Epithelial Cells

Ventilation-Like Mechanical Strain Modulates the Inflammatory Response of BEAS2B Epithelial Cells
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类通气机械应变调节 BEAS2B 上皮细胞的炎症反应

DOI:
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发表时间:
2019
影响因子:
--
通讯作者:
S. Schumann
S. Schumann
中科院分区:
生物学2区
文献类型:
--
作者:
S. Spassov;C. Keßler;Rebecca Jost;S. Schumann

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保护性机械通气旨在防止呼吸机引起的肺损伤,同时确保充分的气体交换。一种新的方法侧重于机械通气的时间曲线。我们假设,时间的机械应变曲线调制炎症信号。我们将具有不同时间分布的周期性应变应用于人支气管上皮细胞(BEAS 2B)并评估促炎反应。使细胞经受正弦曲线、矩形或三角形应变曲线和预应变设定为最大应变的0、25、50或75%的矩形应变曲线、静态应变和类似于机械通气样曲线的应变,具有或不具有流量控制呼气。BEAS 2B对机械负荷的反应包括线粒体活性改变、超氧自由基水平增加、NF-κ B易位和白细胞介素-8释放。对应变的响应基本上由刺激模式的动力学调制。应变曲线的动态变化率与机械应力诱导的细胞响应的程度相关。
Protective mechanical ventilation is aimed at preventing ventilator-induced lung injury while ensuring sufficient gas exchange. A new approach focuses on the temporal profile of the mechanical ventilation. We hypothesized that the temporal mechanical strain profile modulates inflammatory signalling. We applied cyclic strain with various temporal profiles to human bronchial epithelial cells (BEAS2B) and assessed proinflammatory response. The cells were subjected to sinusoidal, rectangular, or triangular strain profile and rectangular strain profile with prestrain set to 0, 25, 50, or 75% of the maximum stain, static strain, and strain resembling a mechanical ventilation-like profile with or without flow-controlled expiration. The BEAS2B response to mechanical load included altered mitochondrial activity, increased superoxide radical levels, NF-kappaB translocation, and release of interleukin-8. The response to strain was substantially modulated by the dynamics of the stimulation pattern. The rate of dynamic changes of the strain profile correlates with the degree of mechanical stress-induced cell response.
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