Abstract
Poly(d,l-lactide) (PLA) microparticles containing the ovalbumin (OVA) model antigen were prepared by the double-emulsion and solvent evaporation method, followed by encapsulation with alternating layers of the polyelectrolytes, consisting of protamine sulfate and dextran sulfate of various molecular weights. The physicochemical properties, including particle size and zeta potentials, were characterised. Treatment of mouse macrophages with surface-modified PLA microparticles stimulated the generation of reactive oxygen species (ROS), such as hydrogen peroxide and superoxide, which was detected by the fluorescent probes, 2′,7′-dichlorofluorescein diacetate (DCFH-DA) and hydroethidine (HE). Incubation of murine bone marrow-derived dendritic cells (BMDCs) with the encapsulated PLA microparticles enhanced the presentation of OVA soluble antigens in B3Z cells, an OVA-specific CD8+ T cell hybridoma. Results obtained in this study demonstrated the potential use of polyelectrolyte-encapsulated biodegradable microparticles for delivery of soluble antigens to the antigen-presenting cells and stimulation of effective antigen presentation in the context of class I major histocompatibility complex.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
