Modeling surface pH measurements of oocytes

Modeling surface pH measurements of oocytes
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模拟卵母细胞表面 pH 测量

DOI:
10.1088/2057-1976/ac71d0
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发表时间:
2022
影响因子:
1.4
通讯作者:
Somersalo, E
Somersalo, E
中科院分区:
--
文献类型:
--
作者:
Bocchinfuso, A;Calvetti, D;Somersalo, E

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气体跨细胞膜的运输在许多不同的细胞功能中发挥着关键作用,从细胞呼吸到 pH 控制。数学模型在理解影响气体通过膜传输的因素方面发挥着核心作用,并且是测试优先穿过特定气体通道的新假设所需的工具。由于细胞膜的表面pH值是通过CO 2 和NH 3 等气体的传输来调节的,因此可以通过pH测量间接推断膜的性质。基于最新表面 pH 值模型的数值模拟支持这样的假设:测量装置(细胞表面上的液膜 pH 敏感电极)的存在可能会干扰局部 pH 值,导致测量值出现系统偏差。为了考虑到这种现象,有必要为模型配备 pH 电极创建的微环境的描述。在这项工作中,我们提出了一种新颖的、计算量轻的数值算法来模拟表面 pH 数据。通过一系列具有物理解释的数值实验来研究模型的不同参数对输出的影响。
The transport of gases across cell membranes plays a key role in many different cell functions, from cell respiration to pH control. Mathematical models play a central role in understanding the factors affecting gas transport through membranes, and are the tool needed for testing the novel hypothesis of the preferential crossing through specific gas channels. Since the surface pH of cell membrane is regulated by the transport of gases such as CO 2 and NH 3, inferring the membrane properties can be done indirectly from pH measurements. Numerical simulations based on recent models of the surface pH support the hypothesis that the presence of a measurement device, a liquid-membrane pH sensitive electrode on the cell surface may disturb locally the pH, leading to a systematic bias in the measured values. To take this phenomenon into account, it is necessary to equip the model with a description of the micro-environment created by the pH electrode. In this work we propose a novel, computationally lightweight numerical algorithm to simulate the surface pH data. The effect of different parameters of the model on the output are investigated through a series of numerical experiments with a physical interpretation.
DOI: 10.1096/fj.04-3300com
发表时间: 2006-10-01
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影响因子: 64.8
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