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Interactions of Surface-Functionalized Starch Nanoparticles with Pepsin and Trypsin in Simulated Gastrointestinal Fluids.
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2020-08-20 , DOI: 10.1021/acs.jafc.0c02820
Yihui Wang 1 , Yujing Sun 1 , Jie Yang 1 , Lei Dai 1 , Na Ji 1 , Liu Xiong 1 , Qingjie Sun 1
Journal of Agricultural and Food Chemistry ( IF 5.7 ) Pub Date : 2020-08-20 , DOI: 10.1021/acs.jafc.0c02820
Yihui Wang 1 , Yujing Sun 1 , Jie Yang 1 , Lei Dai 1 , Na Ji 1 , Liu Xiong 1 , Qingjie Sun 1
Affiliation
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Nanoparticles (NPs) can form a protein corona (PC) with proteins in biological fluids. We examined whether starch nanoparticles (SNPs) form a PC and interact with digestive enzymes in simulated gastric and intestinal fluids. We investigated the adsorption of pepsin and trypsin on unmodified, carboxyl-, and amino-modified SNPs (SNPs, COOH-SNPs, and NH2-SNPs, respectively). Quartz crystal microbalance data showed that a tight and irreversible pepsin corona formed on the NH2-SNPs, pepsin had little or no binding to the SNPs and COOH-SNPs, and trypsin had weak binding to all three kinds of NPs. Dynamic light scattering data showed that pepsin significantly increased the size of the NH2-SNPs from 120 ± 2.6 to 203 ± 12.2 nm and decreased their surface potential from 23.2 ± 1.0 to 12.7 ± 0.2 mV. NH2-SNPs could induce the fluorescence quenching of pepsin and change its secondary structures without affecting its activity.
中文翻译:
表面功能化淀粉纳米粒子与胃蛋白酶和胃蛋白酶中的胃蛋白酶和胰蛋白酶的相互作用。
纳米粒子(NPs)可以与生物流体中的蛋白质形成蛋白质电晕(PC)。我们检查了淀粉纳米颗粒(SNP)是否形成PC并与模拟胃液和肠液中的消化酶相互作用。我们研究了胃蛋白酶和胰蛋白酶在未修饰的,羧基和氨基修饰的SNPs(分别为SNPs,COOH-SNPs和NH 2 -SNPs)上的吸附。石英晶体微天平数据表明,在NH 2 -SNPs上形成了紧密且不可逆的胃蛋白酶电晕,胃蛋白酶与SNPs和COOH-SNPs几乎没有或没有结合,而胰蛋白酶与这三种NPs的结合都很弱。动态光散射数据显示胃蛋白酶显着增加了NH 2的大小-SNP从120±2.6纳米降至203±12.2 nm纳米,表面电位从23.2±1.0纳米降至12.7±0.2毫伏。NH 2 -SNPs可以诱导胃蛋白酶的荧光猝灭并改变其二级结构,而不影响其活性。
更新日期:2020-09-16
中文翻译:
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表面功能化淀粉纳米粒子与胃蛋白酶和胃蛋白酶中的胃蛋白酶和胰蛋白酶的相互作用。
纳米粒子(NPs)可以与生物流体中的蛋白质形成蛋白质电晕(PC)。我们检查了淀粉纳米颗粒(SNP)是否形成PC并与模拟胃液和肠液中的消化酶相互作用。我们研究了胃蛋白酶和胰蛋白酶在未修饰的,羧基和氨基修饰的SNPs(分别为SNPs,COOH-SNPs和NH 2 -SNPs)上的吸附。石英晶体微天平数据表明,在NH 2 -SNPs上形成了紧密且不可逆的胃蛋白酶电晕,胃蛋白酶与SNPs和COOH-SNPs几乎没有或没有结合,而胰蛋白酶与这三种NPs的结合都很弱。动态光散射数据显示胃蛋白酶显着增加了NH 2的大小-SNP从120±2.6纳米降至203±12.2 nm纳米,表面电位从23.2±1.0纳米降至12.7±0.2毫伏。NH 2 -SNPs可以诱导胃蛋白酶的荧光猝灭并改变其二级结构,而不影响其活性。