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Preparation and Characterization of Nanoliposomes for the Entrapment of Bioactive Hydrophilic Globular Proteins
Published on: August 31, 2019
Oxidation-resistant nanoliposomes loaded with osteogenic peptides: Characteristics, stability and bioaccessibility
Dongyang Zhu1, Shuzhen Cheng1, Ming Du1
1State Key Laboratory of Marine Food Processing and Safety Control, Dalian Polytechnic University, Dalian 116034, Liaoning, China; School of Food Science and Technology, National Engineering Research Center of Seafood, Dalian Polytechnic University, Dalian 116034, Liaoning, China; Liaoning Key Laboratory of Food Nutrition and Health, Dalian Polytechnic University, Dalian 116034, Liaoning, China.
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Phosphatidylcholine (PC) oxidation leads to the fusion of nanoliposomes and leakage of containment compounds during the storage period. This study aims to improve the oxidation resistance by partially substituting PC in the osteogenic peptides (OPs) loaded nanoliposomes with hydrogenated phosphatidylcholine (HPC). The investigation assessed the characteristics, stability, and bioaccessibility of these novel nanoliposomes. By altering the PC/HPC mass ratio from 1:0 to 0:1, an increase in the encapsulation efficiency (EE), loading capacity (LC), polydispersity index (PDI), and bioaccessibility of OPs-loaded nanoliposomes was observed. Additionally, there was a decrease in thiobarbituric acid reactive substances (TBARS), peroxide value (POV), non-volatile aldehyde, and ketone. The stability of salt decreased when using HPC alone (0:1). The performance of OPs-loaded nanoliposomes with a PC/HPC mass ratio of 1:3 was found to be satisfactory in terms of storage and pH stability. Fluorescence spectroscopy, Differential Scanning Calorimetry (DSC) and Fourier Transform Infrared spectroscopy (FTIR) revealed a tighter lipid aggregation, enhanced intermolecular van der Waals forces, and hydrogen bond formation in membranes of nanoliposomes containing HPC. The addition of HPC to the nanoliposomes delayed the release of peptides in simulated without affecting osteogenic activity. These results provide guidance for the development of oxidation-resistant nanoliposomes loaded with OPs products.
