title: Stability during in vitro digestion of lactoferrin-loaded liposomes prepared from milk fat globule membrane-derived phospholipids.
abstract: Liposomes loaded with positively charged lactoferrin (LF) were prepared from milk fat globule membrane-derived phospholipids using a thin-layer dispersion method. The entrapment efficiency of LF in the liposomes and the stability during in vitro gastrointestinal digestion were characterized and examined using dynamic light scattering, transmission electron microscopy, and PAGE. The entrapment efficiency of LF encapsulated in the liposomes was about 46%. The entrapped LF remained unchanged as a function of time and pepsin concentration when the liposome samples were digested in a simulated gastric environment, suggesting that the liposomes prepared from milk fat globule membrane-derived phospholipids were stable and protected the entrapped LF from pepsin hydrolysis. In simulated intestinal fluid, the entrapped LF was more susceptible to hydrolysis by the protease in pancreatin, as shown by changes in the diameter and membrane structure of the liposomes. The release of free fatty acids from the liposomes during digestion in simulated intestinal fluid revealed that the phospholipids in the liposomes were partly hydrolyzed by pancreatic lipase. It was suggested that liposomes may prevent the gastric degradation of LF and reduce the rate of hydrolysis of LF in intestinal conditions.
authors: State Key Laboratory of Food Science and Technology, Nanchang University, No. 235, Nanjing East Road, Nanchang, 330047, Jiangxi, P.R. China; Riddet Institute, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.
authors: Weilin
authors: W
authors: Liu
authors: Riddet Institute, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand. Electronic address: a.m.ye@massey.ac.nz.
authors: Aiqian
authors: A
authors: Ye
authors: State Key Laboratory of Food Science and Technology, Nanchang University, No. 235, Nanjing East Road, Nanchang, 330047, Jiangxi, P.R. China.
authors: Wei
authors: W
authors: Liu
authors: State Key Laboratory of Food Science and Technology, Nanchang University, No. 235, Nanjing East Road, Nanchang, 330047, Jiangxi, P.R. China. Electronic address: chengmeiliu@yahoo.com.cn.
authors: Chengmei
authors: C
authors: Liu
authors: Riddet Institute, Massey University, Private Bag 11 222, Palmerston North 4442, New Zealand.
authors: Harjinder
authors: H
authors: Singh
mesh_terms: D000818:Animals; D055598:Chemical Phenomena; D004063:Digestion; D004355:Drug Stability; D005750:Gastric Juice; D006017:Glycolipids / Q000737:chemistry*; D006023:Glycoproteins / Q000737:chemistry*; D006863:Hydrogen-Ion Concentration; D006868:Hydrolysis; D066298:In Vitro Techniques; D007781:Lactoferrin / Q000008:administration & dosage / Q000378:metabolism*; D066292:Lipid Droplets; D008066:Lipolysis; D008081:Liposomes / Q000737:chemistry / Q000378:metabolism; D046529:Microscopy, Electron, Transmission; D010316:Particle Size; D010743:Phospholipids / Q000737:chemistry / Q000378:metabolism
chemical_list: D006017:Glycolipids; D006023:Glycoproteins; D008081:Liposomes; D010743:Phospholipids; C110367:milk fat globule; D007781:Lactoferrin