title: Surface-modified PLGA-based nanoparticles that can efficiently associate and deliver virus-like particles.
abstract: OBJECTIVE
  To design and develop a new nanocarrier appropriately engineered for the adequate accommodation of a virus-like particle, the recombinant hepatitis B surface antigen (22 nm), and intended to be used for the transmucosal delivery of the associated antigen. The nanoparticles consisted of a core blend of poly(D,L-lactide-co-glycolide) and poloxamer 188, and a hydrophilic shell of chitosan.
  
  
  RESULTS
  By by conveniently adapting the nanoprecipitation technique, it was possible to associate a significant amount of active antigen (44%) to the nanocarrier. The resulting nanosystems had a size of around 200 nm and positive zeta potential attributed to the association of chitosan. The nanoparticles were able to deliver the associated antigen in a controlled manner for up to 14 days without compromising its activity, as determined by ELISA. Moreover, the antigenicity of the recombinant hepatitis B surface antigen was preserved for at least 14 days, when stored as an aqueous suspension, and for at least 3 months when converted in a freeze-dried powder.
  
  
  CONCLUSIONS
  Poly(D,L,lactic-co-glycolic acid)-based nanoparticles represent a promising approach for the delivery of virus-like-particles.
authors.affiliation: Department of Pharmacy & Pharmaceutical Technology, School of Pharmacy, University of Santiago de Compostela, 15782 Santiago de Compostela, Spain.
authors.forename: Patrizia
authors.initials: P
authors.lastname: Paolicelli
authors.forename: Cecilia
authors.initials: C
authors.lastname: Prego
authors.forename: Alejandro
authors.initials: A
authors.lastname: Sanchez
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Alonso
mesh_terms: D019344:Lactic Acid; D053758:Nanoparticles; D011100:Polyglycolic Acid; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D013499:Surface Properties; D014771:Virion
chemical_list: D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011100:Polyglycolic Acid; D019344:Lactic Acid