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A kinetic model of control on secretion in neuroendocrine cells

机译:控制神经内分泌细胞分泌的动力学模型

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Transmitter release is the fundamental mechanism for chemical communication between cells. The releasing of secretory vesicle contents into extracellular space has several kinetic steps, and each step is controlled by free intracellular calcium concentration [Ca/sup 2+/]/sub i/. The releasable vesicles pool has two parts, immediately releasable pool (IRP) and readily releasable pool (RRP), which are respectively distributed within about 30 nm and 300 nm from Ca/sup 2+/ channels. We use membrane capacitance measurement technique to monitor secretory activity, and determine the size of secretory vesicle pools. A corresponding model of secretion can simulate the dynamics of vesicles pools with the control of [Ca/sup 2+/]/sub i/.
机译:变送器释放是细胞之间化学通信的基本机制。将分泌囊泡含量释放到细胞外空间中具有几个动力学步骤,并且每个步骤通过自由细胞内钙浓度来控制[Ca / sup 2 + /] / sub I /。可释放的囊泡池具有两部分,可释放的池(IRP)和易于可释放的池(RRP),其分别从CA / SUP 2 + /通道分布在约30nm和300nm内。我们使用膜电容测量技术来监测分泌活动,并确定分泌囊泡池的尺寸。相应的分泌模型可以通过控制[CA / SUP 2 + /] /子I / SUB I / SUB,模拟囊泡池的动态。

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