TLR ligands and antigen need to be coencapsulated into the same biodegradable microsphere for the generation of potent cytotoxic T lymphocyte responses

Eva Schlosser, Marc Mueller, Stefan Fischer, Sameh Basta, Dirk H. Busch, Bruno Gander, Marcus Groettrup

Research output: Contribution to journalArticlepeer-review

240 Scopus citations

Abstract

Dendritic cells phagocytose pathogens leading to maturation and cross-presentation on MHC class I. We found that the efficiency of cross-priming in mice after vaccination with biodegradable poly(d,l-lactide-co-glycolide) microspheres (MSs) was enhanced when ovalbumin was coencapsulated together with either a CpG oligonucleotide or polyI:C as compared to co-inoculation of ovalbumin-bearing MS with soluble or separately encapsulated adjuvants. A single immunization with MS containing coencaspsulated CpG and ovalbumin yielded 9% SIINFEKL/H-2Kb tetramer positive CTLs, production of IFN-γ, efficient cytolysis, and protection from vaccinia virus infection. Taken together, coencapsulation of adjuvant and antigen is an important paradigm for the generation of potent CTL responses.

Original languageEnglish
Pages (from-to)1626-1637
Number of pages12
JournalVaccine
Volume26
Issue number13
DOIs
StatePublished - 20 Mar 2008

Keywords

  • Biodegradable microspheres
  • Cytotoxic T cells
  • Viral infection

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