title: Mucus interactions with liposomes encapsulating bioactives: Interfacial tensiometry and cellular uptake on Caco-2 and cocultures of Caco-2/HT29-MTX.
abstract: Structuring of delivery matrices in foods aquires careful designing for optimal delivery and subsiquent absorption of the beneficial compounds in the gut. There has been quite improvement in mimicking digestion and absorption in vitro but as of yet little is understood on mucus interference in nutrient absorption Therefore in this study interactions of human intestinal mucus with milk and soy phospholipids liposomes carring hydrophilic (epigallocatechin-3-gallate) or hydrophobic (β-carotene) bioactive molecules were investigated. Liposomes of about 100nm were obtained using microfluidization and their behaviour with the human intestinal mucus were evaluated using drop shape tensiometry. The chemistry of the liposomes (milk or soy) and the encapsulated bioactive structure can affect the viscoelastic behaviour of the complex itself. Empty or loaded liposomes were differently interacting with the mucus at the interface. Mucus-liposomes interactions were also studied using cell cultures, Caco-2 (without mucus) and cocultures Caco-2/HT29-MTX (mucus producing). The interaction of mucus layer with liposomes was at some extent aligned with rheological studies. This work demonstrated that delivery systems may interact with the mucosal surface of intestinal cells, and in vitro approaches allow for screening of such interactions. These highlights could help us in carefully designing the delivery systems and moreover choosing the right carrier and/or bioactive that does not jeopardize the optimal delivery of the bioactive structure.
authors.affiliation: University of Guelph, Department of Food Science, Stone Rd 50, N1G 2W1 Guelph, ON, Canada.
authors.forename: Yang
authors.initials: Y
authors.lastname: Li
authors.affiliation: University of Guelph, Department of Food Science, Stone Rd 50, N1G 2W1 Guelph, ON, Canada.
authors.forename: Elena
authors.initials: E
authors.lastname: Arranz
authors.affiliation: University of Guelph, Department of Food Science, Stone Rd 50, N1G 2W1 Guelph, ON, Canada. Electronic address: aguri@uoguelph.ca.
authors.forename: Anilda
authors.initials: A
authors.lastname: Guri
authors.affiliation: University of Guelph, Department of Food Science, Stone Rd 50, N1G 2W1 Guelph, ON, Canada.
authors.forename: Milena
authors.initials: M
authors.lastname: Corredig
mesh_terms: D000818:Animals; D018938:Caco-2 Cells; D002392:Catechin / Q000008:administration & dosage / Q000031:analogs & derivatives; D002470:Cell Survival / Q000187:drug effects; D018920:Coculture Techniques; D019073:HT29 Cells; D006801:Humans; D006863:Hydrogen-Ion Concentration; D057927:Hydrophobic and Hydrophilic Interactions; D007408:Intestinal Absorption; D007413:Intestinal Mucosa / Q000166:cytology / Q000378:metabolism; D008081:Liposomes / Q000378:metabolism*; D008892:Milk / Q000737:chemistry; D009093:Mucus / Q000378:metabolism*; D012212:Rheology; D013025:Glycine max / Q000737:chemistry; D013696:Temperature; D019207:beta Carotene / Q000008:administration & dosage
chemical_list: D008081:Liposomes; D019207:beta Carotene; D002392:Catechin; C045651:epigallocatechin gallate
keywords: EGCG; Elastic modulus; Interfacial tension; Intestinal mucus; Liposomes; β-Carotene