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Journal of Virology, February 2003, p. 2775-2778, Vol. 77, No. 4
0022-538X/03/$08.00+0     DOI: 10.1128/JVI.77.4.2775-2778.2003
Copyright © 2003, American Society for Microbiology. All Rights Reserved.

Kinetics of Virus-Specific CD8⁺-T-Cell Expansion and Trafficking following Central Nervous System Infection

Departments of Pathology,¹ Neurology,² Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, California 90033³

Received 31 July 2002/ Accepted 18 November 2002

CD8⁺ T cells control acute infection of the central nervous system (CNS) by neurotropic mouse hepatitis virus but do not suffice to achieve sterile immunity. To determine the lag between T-cell priming and optimal activity within the CNS, the accumulation of virus-specific CD8⁺ T cells in the CNS relative to that in peripheral lymphoid organs was assessed by using gamma interferon-specific ELISPOT assays and class I tetramer staining. Virus-specific CD8⁺ T cells were first detected in the cervical lymph nodes. Expansion in the spleen was delayed and less pronounced but also preceded accumulation in the CNS. The data further suggest peripheral acquisition of cytolytic function, thus enhancing CD8⁺-T-cell effector function upon cognate antigen recognition in the CNS.

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