The influence of inducible costimulator fusion protein (ICOSIg) gene transfer on corneal allograft survival

Daniel Fabian, Nianqiao Gong, Katrin Vogt, Hans Dieter Volk, Uwe Pleyer, Thomas Ritter

Research output: Contribution to a Journal (Peer & Non Peer)Articlepeer-review

12 Citations (Scopus)

Abstract

Background: The purpose of this paper is to analyse the effects of local or systemic administration of adenovirus type 5 encoding the inducible costimulator fusion protein (AdICOSIg) on its influence on prolonging corneal allograft survival. Methods: The ICOSIg chimeric molecule was generated by fusing the murine ICOS to a rat FcIgG portion and a recombinant adenovirus (Ad) was made thereof. A major histocompatibility complex (MHC) class I/II mismatched rat corneal transplant model was used. The recipients were randomly assigned to receive ex vivo gene-modified corneas expressing either ICOSIg or a single i.p. injection (1.0×109 infectious particles) of AdICOSIg two days after transplantation and graft survival was analysed. Moreover, the influence of ICOSIg fusion protein on anti-adenovirus immunity also was investigated. Results: The ex vivo gene transfer of ICOSIg in cultured corneas resulted in high levels of ICOSIg protein in culture supernatants. However, neither ex vivo nor systemic gene therapy resulted in a significant prolongation of graft survival. Interestingly, the generation of anti-adenovirus antibodies could not be inhibited by systemic ICOSIg fusion protein expression. Conclusions: Unlike CTLA4Ig, sole ICOSIg gene therapy is not a successful strategy for the prevention of allogeneic graft rejection in corneal transplantation.

Original languageEnglish
Pages (from-to)1515-1521
Number of pages7
JournalGraefe's Archive for Clinical and Experimental Ophthalmology
Volume245
Issue number10
DOIs
Publication statusPublished - Oct 2007

Keywords

  • Adenovirus
  • Cornea
  • Gene therapy
  • ICOSIg
  • Immunomodulation
  • Transplantation

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