title: Nanostructured Montmorillonite Clay for Controlling the Lipase-Mediated Digestion of Medium Chain Triglycerides.
abstract: Biocompatible lipid hybrid particles composed of montmorillonite and medium chain triglycerides were engineered for the first time by spray drying oil-in-water emulsions stabilized by montmorillonite platelets to form montmorillonite-lipid hybrid (MLH) microparticles containing up to 75% w/w lipid. In vitro lipolysis studies under simulated intestinal conditions indicated that the specific porous nanoarchitecture and surface chemistry of MLH particles significantly increased the rate (>10-fold) and extent of lipase-mediated digestion compared to that of coarse and homogenized submicrometer triglyceride emulsions. Proton nuclear magnetic resonance studies verified the rapid and enhanced production of fatty acids for MLH particles; these are electrostatically repelled by the negatively charged montmorillonite platelet faces and avoid the "interfacial poisoning" caused by incomplete digestion that retards lipid droplet digestion. MLH particles are a novel biomaterial and encapsulation system that optimize lipase enzyme efficiency and have excellent potential as a smart delivery system for lipophilic biomolecules owing to their exceptional physicochemical and biologically active properties. These particles can be readily fabricated with varying lipid loads and thus may be tailored to optimize the solubilization of specific bioactive molecules requiring reformulation.
authors.affiliation: School of Pharmacy and Medical Sciences, University of South Australia , City East Campus, Adelaide, South Australia 5001, Australia.
authors.forename: Tahnee J
authors.initials: TJ
authors.lastname: Dening
authors.affiliation: Future Industries Institute, University of South Australia , Mawson Lakes Campus, Mawson Lakes, South Australia 5095, Australia.
authors.forename: Paul
authors.initials: P
authors.lastname: Joyce
authors.affiliation: School of Pharmacy and Medical Sciences, University of South Australia , City East Campus, Adelaide, South Australia 5001, Australia.
authors.forename: Shasha
authors.initials: S
authors.lastname: Rao
authors.affiliation: School of Pharmacy and Medical Sciences, University of South Australia , City East Campus, Adelaide, South Australia 5001, Australia.
authors.forename: Nicky
authors.initials: N
authors.lastname: Thomas
authors.affiliation: School of Pharmacy and Medical Sciences, University of South Australia , City East Campus, Adelaide, South Australia 5001, Australia.
authors.forename: Clive A
authors.initials: CA
authors.lastname: Prestidge
mesh_terms: D016503:Drug Delivery Systems; D006868:Hydrolysis; D007700:Kinetics; D054709:Lecithins / Q000737:chemistry; D008049:Lipase / Q000737:chemistry*; D008055:Lipids / Q000737:chemistry*; D008066:Lipolysis; D049329:Nanostructures / Q000737:chemistry*; D010743:Phospholipids / Q000737:chemistry; D014280:Triglycerides / Q000737:chemistry*
chemical_list: D054709:Lecithins; D008055:Lipids; D010743:Phospholipids; D014280:Triglycerides; D008049:Lipase
keywords: clay; hybrid microparticles; lipase; lipid digestion; lipid-based formulation; lipolysis; montmorillonite