An alternative solution for alpha-linolenic acid supplements: in vitro digestive properties of silkworm pupae oil in a pH-stat system

文献类型： 外文期刊

第一作者： Yan, Cheng-Hai

作者： Yan, Cheng-Hai;Xun, Xiao-Meng;Wang, Jiao;Wang, Jin-Zheng;You, Shuai;Wu, Fu-An;Wang, Jun;You, Shuai;Wu, Fu-An;Wang, Jun

作者机构：

期刊名称：FOOD & FUNCTION （ 影响因子：4.171； 五年影响因子：4.364 ）

ISSN： 2042-6496

年卷期： 2021 年 12 卷 6 期

页码：

收录情况： SCI

摘要： alpha-Linolenic acid (ALA) is recognised to have a regulatory effect on cardiovascular diseases. Due to the low bioavailability of linseed oil (LINO), which is the most common ALA supplement, it is necessary to find a replacement for ALA supplements that is more easily accepted by the human body. The content of ALA in silkworm pupae oil (SPO) is 32.60 +/- 0.67%, and SPO can be substituted as a dietary lipid to meet the demand of the human body. In the present study, a pH-stat system was used to investigate the release degree of free fatty acids (FFAs) from SPO and construct a first-order kinetic model. Digestion experiments in vitro with different lipids showed that the maximum release FFA levels were SPO > SO (soybean oil) > LO (lard oil) > MSO (mulberry seed oil) > LINO, and the first-order kinetic apparent rate constants were LINO > SPO > LO > SO > MSO. Triacylglycerol (TAG) and fatty acid composition are the decisive factors in determining the level of lipid digestion. Therefore, the maximum level of FFAs released from SPO (84.34 +/- 1.37%) was much higher than that of LINO (49.78 +/- 0.52%) when the hydrolysis rates were 0.2114 s(-1) and 0.2249 s(-1), respectively. In addition, the smaller emulsion droplet size (609.24 +/- 43.46 nm) and weaker surface charge (-17.93 +/- 0.42 mV) also resulted in higher levels of SPO under in vitro digestion conditions. Meanwhile, due to low melting and crystallisation temperature, SPO is quickly absorbed by the human body. Overall, SPO can be used as a new alternative for ALA supplements based on its superior digestive properties.

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