title: Active targeting of dendritic cells with mannan-decorated PLGA nanoparticles.
abstract: The purpose of this study was to identify an optimum targeted particulate formulation based on mannan (MN)-decorated poly(D, L-lactide-co-glycolide) (PLGA) nanoparticles (NPs), for efficient delivery of incorporated cargo to dendritic cells (DCs). In brief, NPs were formulated from two different types of PLGA; ester-terminated (capped) or COOH-terminated (uncapped) polymer. Incorporation of MN in NPs was achieved either through addition of MN during the process of NP formation or by attachment of MN onto the surface of the freeze dried NPs by physical adsorption or chemical conjugation (to COOH terminated polymer). The formulated NPs were characterized in terms of particle size, Zeta potential and level of MN incorporation. The effect of polymer type and the incorporation method on the extent of fluorescently labelled NP uptake by murine bone marrow-derived DCs have been investigated using flowcytometry. The results of this study showed MN incorporation to enhance the uptake of PLGA NPs by DCs. Among different MN incorporation strategies, covalent attachment of MN to COOH-terminated PLGA-NPs provided the highest level of MN surface decoration on NPs. Maximum NP uptake by DCs was achieved by COOH terminated PLGA NPs containing covalent or adsorbed MN. Therefore, a better chance of success for these formulations for active targeted drug and/or vaccine delivery to DCs is anticipated.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences, 3133 Dentistry/Pharmacy Centre, University of Alberta, Edmonton, Alberta, Canada.
authors.forename: Zahra
authors.initials: Z
authors.lastname: Ghotbi
authors.forename: Azita
authors.initials: A
authors.lastname: Haddadi
authors.forename: Samar
authors.initials: S
authors.lastname: Hamdy
authors.forename: Ryan W
authors.initials: RW
authors.lastname: Hung
authors.forename: John
authors.initials: J
authors.lastname: Samuel
authors.forename: Afsaneh
authors.initials: A
authors.lastname: Lavasanifar
mesh_terms: D000818:Animals; D003713:Dendritic Cells / Q000378:metabolism*; D016503:Drug Delivery Systems; D019344:Lactic Acid / Q000737:chemistry* / Q000378:metabolism*; D008264:Macrophages / Q000378:metabolism*; D008351:Mannans / Q000737:chemistry*; D051379:Mice; D008810:Mice, Inbred C57BL; D015394:Molecular Structure; D053758:Nanoparticles / Q000737:chemistry*; D011100:Polyglycolic Acid / Q000737:chemistry* / Q000378:metabolism*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer
chemical_list: D008351:Mannans; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid