Modeling Individual Differences in Food Metabolism through Alternating Least Squares

Modeling Individual Differences in Food Metabolism through Alternating Least Squares
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通过交替最小二乘法模拟食物代谢的个体差异

DOI:
10.1109/embc48229.2022.9871822
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发表时间:
2022
期刊:
2022 44th Annual International Conference of the IEEE Engineering in Medicine & Biology Society (EMBC
影响因子:
--
通讯作者:
Gutierrez-Osuna, Ricardo
Gutierrez-Osuna, Ricardo
中科院分区:
--
文献类型:
--
作者:
Das, Anurag;Mortazavi, Bobak;Deutz, Nicolaas;Gutierrez-Osuna, Ricardo

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了解宏量营养素(例如,碳水化合物、蛋白质、脂肪)影响血糖的研究在健康和饮食研究中引起广泛兴趣。一般的影响是众所周知的,例如,在以碳水化合物为基础的膳食中添加蛋白质和脂肪有助于降低血糖。然而,食物代谢存在很大的个体差异,相同的膳食可能导致个体之间不同的葡萄糖反应。为了解决这个问题,我们提出了一种技术,可用于同时(1)建模宏量营养素随时间对葡萄糖水平的影响和(2)捕获对宏量营养素敏感性的个体间差异。该模型假设每种常量营养素都为常量营养素代谢的差异增加了一个基函数。该技术对葡萄糖反应进行线性分解,在估计宏量营养素随时间的影响和捕获个体对宏量营养素的敏感性之间交替。在包含对各种混合膳食的葡萄糖响应的实验数据集上,该技术能够提取与其对PPGR的假设影响一致的常量营养素的基函数,并且还表征常量营养素如何不同地影响个体。
Understanding how macronutrients (e.g., carbohydrates, protein, fat) affect blood glucose is of broad interest in health and dietary research. The general effects are well known, e.g., adding protein and fat to a carbohydrate-based meal tend to reduce blood glucose. However, there are large individual differences in food metabolism, to where the same meal can lead to different glucose responses across individuals. To address this problem, we present a technique that can be used to simultaneously (1) model macronutrients' effects on glucose levels over time and (2) capture inter-individual differences in sensitivity to macronutrients. The model assumes that each macronutrient adds a basis function to the differences in macronutrient metabolism. The technique performs a linear decomposition of glucose responses, alternating between estimating the macronutrients' effect over time and capturing an individual's sensitivity to macronutrients. On an experimental dataset containing glucose responses to a variety of mixed meals, the technique is able to extract basis functions for the macronutrients that are consistent with their hypothesized effects on PPGRs, and also characterize how macronutrients affect individuals differently.
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