Protective Immunity Does Not Correlate with the Hierarchy of  Virus-specific Cytotoxic T Cell Responses to Naturally Processed Peptides

Author:

Gallimore Awen1,Dumrese Tilman1,Hengartner Hans1,Zinkernagel Rolf M.1,Rammensee Hans-Georg1

Affiliation:

1. From the Institute of Experimental Immunology, CH-8091 Zürich, Switzerland; and the University of Tübingen, Institute for Cell Biology, 72076 Tübingen, Germany

Abstract

Infection of C57BL/6 mice with lymphocytic choriomeningitis virus (LCMV) stimulates major histocompatibility complex class I–restricted cytotoxic T cells (CTLs), which normally resolve the infection. Three peptide epitopes derived from LCMV have been shown to bind the mouse class I molecule H-2 Db and to stimulate CTL responses in LCMV-infected mice. This report describes the identity and abundance of each CTL epitope after their elution from LCMV-infected cells. Based on this information, peptide abundance was found to correlate with the magnitude of each CTL response generated after infection with LCMV. Subsequent experiments, performed to determine the antiviral capacity of each CTL specificity, indicate that the quantitative hierarchy of CTL activity does not correlate with the ability to protect against LCMV infection. This report, therefore, indicates that immunodominant epitopes should be defined, not only by the strength of the CTL response that they stimulate, but also by the ability of the CTLs to protect against infection.

Publisher

Rockefeller University Press

Subject

Immunology,Immunology and Allergy

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