Critical evaluation of the combined model approach for estimation of prehepatic insulin secretion.

Critical evaluation of the combined model approach for estimation of prehepatic insulin secretion.
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用于估计肝前胰岛素分泌的组合模型方法的批判性评估。

DOI:
10.1152/ajpendo.1998.274.1.e172
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发表时间:
1998
期刊:
The American journal of physiology
影响因子:
--
通讯作者:
Bergman,RN
Bergman,RN
中科院分区:
--
文献类型:
--
作者:
Watanabe,RM;Steil,GM;Bergman,RN

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组合模型方法使用血浆胰岛素和 C 肽动力学的动力学分析来估计肝前胰岛素分泌速率以及胰岛素和 C 肽动力学参数。最初的模型使用单室动力学来描述胰岛素和 C 肽,尽管我们知道 C 肽遵循双室动力学。该模型在快速变化的分泌条件下的性能受到质疑。因此引入了更复杂的组合模型,结合了两室 C 肽消失。添加两室 C 肽动力学需要一种新颖的数值方法来估计模型参数。该模拟研究的目的是 1) 比较原始组合模型的性能,2) 检查用于在胰岛素和 C 肽快速变化的模拟条件下确定具有两室 C 肽动力学的扩展组合模型参数的数值方法。蒙特卡罗模拟表明,原始组合模型不能提供快速动力学下肝前胰岛素分泌的准确估计。然而,扩展的组合模型提供了肝前胰岛素分泌谱的准确重建,而无需单独量化 C 肽动力学。
The combined model approach uses kinetic analysis of both plasma insulin and C-peptide dynamics to estimate prehepatic insulin secretion rates and parameters of insulin and C-peptide kinetics. The original model used single-compartment kinetics to describe both insulin and C-peptide despite knowledge that C-peptide follows two-compartment kinetics. The performance of the model under rapidly changing secretory conditions has come into question. Thus a more complex combined model is introduced, incorporating two-compartmental C-peptide disappearance. The addition of two-compartment C-peptide kinetics required a novel numerical approach to allow estimation of model parameters. This simulation study was undertaken to1) compare the performance of the original combined model and2) examine the numerical method used to identify parameters for the extended combined model with two-compartment C-peptide kinetics under simulated conditions of rapidly changing insulin and C-peptide. Monte Carlo simulation revealed that the original combined model does not provide accurate estimates of prehepatic insulin secretion under rapid kinetics. However, the extended combined model provides accurate reconstruction of prehepatic insulin secretory profile without separate quantification of C-peptide kinetics.
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