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首页> 美国卫生研究院文献>Nutrients >Ingestion of Insect Protein Isolate Enhances Blood Amino Acid Concentrations Similar to Soy Protein in A Human Trial
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Ingestion of Insect Protein Isolate Enhances Blood Amino Acid Concentrations Similar to Soy Protein in A Human Trial

机译：在人体试验中摄入昆虫蛋白分离物可提高血液中大豆蛋白的氨基酸浓度

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Background: Increased amino acid availability stimulates muscle protein synthesis (MPS), which is critical for maintaining or increasing muscle mass when combined with training. Previous research suggests that whey protein is superior to soy protein in regard to stimulating MPS and muscle mass. Nevertheless, with respect to a future lack of dietary protein and an increasing need for using eco-friendly protein sources it is of great interest to investigate the quality of alternative protein sources, like insect protein. Objective: Our aim was to compare the postprandial amino acid (AA) availability and AA profile in the blood after ingestion of protein isolate from the lesser mealworm, whey isolate, and soy isolate. Design: Six healthy young men participated in a randomized cross-over study and received three different protein supplementations (25 g of crude protein from whey, soy, insect or placebo (water)) on four separate days. Blood samples were collected at pre, 0 min, 20 min, 40 min, 60 min, 90 min, and 120 min. Physical activity and dietary intake were standardized before each trial, and participants were instructed to be fasting from the night before. AA concentrations in blood samples were determined using 1H NMR spectroscopy. Results: A significant rise in blood concentration of essential amino acids (EAA), branched-chain amino acids (BCAA) and leucine was detected over the 120 min period for all protein supplements. Nevertheless, the change in AA profile was significantly greater after ingestion of whey than soy and insect protein (p < 0.05). Area under the curve (AUC) analysis and AA profile revealed comparable AA concentrations for soy and insect protein, whereas whey promoted a ~97% and ~140% greater AUC value than soy and insect protein, respectively. A tendency towards higher AA concentrations beyond the 120 min period was observed for insect protein. Conclusion: We report that ingestion of whey, soy, and insect protein isolate increases blood concentrations of EAA, BCAA, and leucine over a 120 min period (whey > insect = soy). Insect protein induced blood AA concentrations similar to soy protein. However, a tendency towards higher blood AA concentrations at the end of the 120 min period post ingestion was observed for insect protein, which indicates that it can be considered a “slow” digestible protein source.
机译：背景：增加的氨基酸利用率可刺激肌肉蛋白质合成（MPS），这与训练相结合对于维持或增加肌肉质量至关重要。先前的研究表明，乳清蛋白在刺激MPS和肌肉质量方面优于大豆蛋白。然而，关于未来缺乏饮食蛋白和使用环保蛋白源的需求不断增长，研究替代蛋白源（如昆虫蛋白）的质量引起了人们极大的兴趣。目的：我们的目的是比较摄入小粉虫，乳清分离物和大豆分离物的蛋白质分离物后，血液中的餐后氨基酸（AA）可用性和AA特性。设计：六名健康的年轻人参加了一项随机交叉研究，并分别在四天内接受了三种不同的蛋白质补充剂（25克来自乳清，大豆，昆虫或安慰剂（水）的粗蛋白）。在pre，0min，20min，40min，60min，90min和120min收集血样。在每次试验之前，应进行体育锻炼和饮食摄入的标准化，并指示参与者从前一晚开始禁食。使用 1 1H NMR光谱法测定血液样品中的AA浓度。结果：在120分钟内，所有蛋白质补充剂的血液中必需氨基酸（EAA），支链氨基酸（BCAA）和亮氨酸的血药浓度均显着增加。然而，乳清摄入后，AA的变化显着大于大豆和昆虫蛋白（p <0.05）。曲线下面积（AUC）分析和AA曲线显示，大豆和昆虫蛋白的AA浓度相当，而乳清分别比大豆和昆虫蛋白的AUC值高〜97％和〜140％。对于昆虫蛋白，观察到超过120分钟的时间有更高的AA浓度趋势。结论：我们报道，摄入乳清，大豆和昆虫蛋白分离物会在120分钟内增加EAA，BCAA和亮氨酸的血液浓度（乳清>昆虫=大豆）。昆虫蛋白诱导的血液中AA浓度与大豆蛋白相似。但是，在摄入昆虫蛋白后120分钟内，血液中AA浓度升高的趋势被观察到，这表明它可以被认为是“缓慢的”可消化蛋白源。

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