MHC class II epitope nesting modulates dendritic cell function and improves generation of antigen-specific CD4 helper T cells

Courtney L. Erskine, Christopher J. Krco, Karen E. Hedin, Nancy D. Borson, Kimberly R. Kalli, Marshall D. Behrens, Sabrina M. Heman-Ackah, Eric Von Hofe, Peter J. Wettstein, Mansour Mohamadzadeh, Keith L. Knutson

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

CD4 Th cells are critical to the development of coordinated immune responses to infections and tumors. Th cells are activated through interactions of the TCR with MHC class II complexed with peptide. T cell activation is dependent on the density of MHC peptide complexes as well as the duration of interaction of the TCR with APCs. In this study, we sought to determine whether MHC class II peptides could be modified with amino acid sequences that facilitated uptake and presentation with the goal of improving Th cell activation in vitro and in vivo. A model epitope derived from the murine folate receptor α, a self- and tumor Ag, was modified at its carboxyl terminus with the invariant chain-derived Ii-Key peptide and at its N terminus with a peptide that enhances uptake of Ag by APC. Modification of a peptide resulted in enhanced generation of high-avidity murine folate receptor a T cells that persisted in vivo and homed to sites of Ag deposition. The nesting approach was epitope and species independent and specifically excluded expansion of CD4 regulatory T cells. The resulting Th cells were therapeutic, enhanced in vivo helper activity and had an increased ability to resist tolerizing immune microenvironments. In addition to improved immunoadjuvants, this epitope modification strategy may be useful for enhancing ex vivo and in vivo generation of Th cells for preventing and treating diseases.

Original languageEnglish (US)
Pages (from-to)316-324
Number of pages9
JournalJournal of Immunology
Volume187
Issue number1
DOIs
StatePublished - Jul 1 2011

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology

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    Erskine, C. L., Krco, C. J., Hedin, K. E., Borson, N. D., Kalli, K. R., Behrens, M. D., Heman-Ackah, S. M., Von Hofe, E., Wettstein, P. J., Mohamadzadeh, M., & Knutson, K. L. (2011). MHC class II epitope nesting modulates dendritic cell function and improves generation of antigen-specific CD4 helper T cells. Journal of Immunology, 187(1), 316-324. https://doi.org/10.4049/jimmunol.1100658