Affiliation:
1. Department of Immunology, St. Jude Children’s Research Hospital, Memphis, Tennessee 38105
Abstract
ABSTRACT
The murine gammaherpesvirus 68 (MHV-68) replicates in respiratory epithelial cells, where it establishes a persistent, latent infection limited predominantly to B lymphocytes. The virus-specific CD4
+
T-cell response in C57BL/6 mice challenged intranasally with MHV-68 is detected first in the mediastinal lymph nodes and then in the cervical lymph nodes and the spleen. The numbers of MHV-68-specific CD4
+
T cells generated in congenic mice homozygous for disruption of the β
2
-microglobulin gene tended to be higher, indicating that the absence of the CD8
+
set in this group resulted in a compensatory response. The peak frequency within the splenic CD4
+
T-cell population may reach 1:50 in the acute response; it then drops to 1:400 to 1:500 within 4 months and stays at that level in the very long term. Sorting for L-selectin (CD62L) expression established that all virus-specific CD4
+
T cells were initially CD62L
low
, with >80% maintaining that phenotype for the next 14 months. The overall conclusion is that MHV-68-specific CD4
+
T cells remain activated (CD62L
low
) and at a stable frequency in the face of persistent infection.
Publisher
American Society for Microbiology
Subject
Virology,Insect Science,Immunology,Microbiology
Cited by
50 articles.
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