Near-infrared labeled, ovalbumin loaded polymeric nanoparticles based on a hydrophilic polyester as model vaccine: Invivo tracking and evaluation of antigen-specific CD8+ T cell immune response

Sima Rahimian, Jan Willem Kleinovink, Marieke F. Fransen, Laura Mezzanotte, Henrik Gold, Patrick Wisse, Hermen Overkleeft, Maryam Amidi, Wim Jiskoot, Clemens W. Löwik, Ferry Ossendorp, Wim E. Hennink

Research output: Contribution to journalArticleAcademicpeer-review

69 Citations (Scopus)


Particulate antigen delivery systems aimed at the induction of antigen-specific T cells form a promising approach in immunotherapy to replace pharmacokinetically unfavorable soluble antigen formulations. In this study, we developed a delivery system using the model protein antigen ovalbumin (OVA) encapsulated in nanoparticles based on the hydrophilic polyester poly(lactide-co-hydroxymethylglycolic acid) (pLHMGA). Spherical nanoparticles with size 300-400nm were prepared and characterized and showed a strong ability to deliver antigen to dendritic cells for cross-presentation to antigen-specific T cells invitro. Using near-infrared (NIR) fluorescent dyes covalently linked to both the nanoparticle and the encapsulated OVA antigen, we tracked the fate of this formulation in mice. We observed that the antigen and the nanoparticles are efficiently co-transported from the injection site to the draining lymph nodes, in a more gradual and durable manner than soluble OVA protein. OVA-loaded pLHMGA nanoparticles efficiently induced antigen cross-presentation to OVA-specific CD8+ T cells in the lymph nodes, superior to soluble OVA vaccination. Together, these data show the potential of pLHMGA nanoparticles as attractive antigen delivery vehicles.
Original languageEnglish
Pages (from-to)469-477
Publication statusPublished - 2015
Externally publishedYes

Cite this