title: Characterization of poly(D,L-lactic-co-glycolic acid) based nanoparticulate system for enhanced delivery of antigens to dendritic cells.
abstract: Biodegradable nanoparticles made of poly(D,L-lactic acid-co-glycolic acid) (PLGA) copolymer were characterized for enhanced delivery of antigens to murine bone marrow derived dendritic cells (DCs) in vitro. PLGA nanoparticles were efficiently phagocytosed by the DCs (CD11c+, MHC class II+, CD86+) in culture, resulting in their intracellular localization. The efficiency of the uptake was influenced by the incubation time and nanoparticle concentration. DCs pulsed with PLGA nanoparticles containing an immunomodulator, monophosphoryl lipid A (MPLA), showed upregulation of surface expression of MHC class II and CD86 molecules. Delivery of a cancer-associated antigen (MUC1 mucin peptide: BLP25) and MPLA in PLGA nanoparticles was shown to be superior to their delivery in the soluble form for activation of naïve T cells of normal and MUC1-transgenic mice. These results strongly suggest that PLGA nanoparticles provide an efficient vaccine delivery system for targeting DCs and the development of DC based cellular vaccines.
authors.affiliation: Faculty of Pharmacy and Pharmaceutical Sciences, 3118 Dentistry/Pharmacy Centre, University of Alberta, Edmonton, Alberta, Canada T6G 2N8.
authors.forename: Praveen
authors.initials: P
authors.lastname: Elamanchili
authors.forename: Manish
authors.initials: M
authors.lastname: Diwan
authors.forename: Min
authors.initials: M
authors.lastname: Cao
authors.forename: John
authors.initials: J
authors.lastname: Samuel
mesh_terms: D000818:Animals; D000941:Antigens / Q000008:administration & dosage*; D003713:Dendritic Cells / Q000378:metabolism*; D016503:Drug Delivery Systems; D019344:Lactic Acid / Q000008:administration & dosage*; D051379:Mice; D008810:Mice, Inbred C57BL; D036103:Nanotechnology / Q000379:methods*; D010587:Phagocytosis / Q000502:physiology; D011100:Polyglycolic Acid / Q000008:administration & dosage*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011108:Polymers / Q000008:administration & dosage*
chemical_list: D000941:Antigens; D011108:Polymers; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid