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J. Virol., Dec 1996, 8888-8895, Vol 70, No. 12
K Klingel, S Stephan, M Sauter, R Zell, BM McManus, B Bultmann and R Kandolf
In order to identify organ and cellular targets of persistent enterovirus
infection in vivo, immunocompetent mice (SWR/J, H-2q) were inoculated
intraperitoneally with coxsackievirus B3 (CVB3). By use of in situ
hybridization for the detection of enteroviral RNA, we show that CVB3 is
capable of inducing a multiorgan disease. During acute infection, viral RNA
was visualized at high levels in the heart muscle, pancreas, spleen, and
lymph nodes and at comparably low levels in the central nervous system,
thymus, lung, and liver. At later stages of the disease, the presence of
enteroviral RNA was found to be restricted to the myocardium, spleen, and
lymph nodes. To characterize infected lymphoid cells during the course of
the disease, enteroviral RNA and cell-specific surface antigens were
visualized simultaneously in situ in spleen tissue sections. In acute
infection, the majority of infected spleen cells, which are located
primarily at the periphery of lymph follicles, were found to express the
CD45R/B220+ phenotype of pre-B and B cells. Whereas viral RNA was also
detected in certain CD4+ helper T cells and Mac-1+ macrophages, no
enteroviral genomes were identified in CD8+ cytotoxic/suppressor T cells.
Later in disease, the localization of enteroviral RNA revealed a persistent
type of infection of B cells within the germinal centers of secondary
follicles. In addition, detection of the replicative viral minus-strand RNA
intermediate provided evidence for virus replication in lymphoid cells of
the spleen during the course of the disease. These data indicate that
immune cells are important targets of CVB3 infection, providing a
noncardiac reservoir for viral RNA during acute and persistent myocardial
enterovirus infection.
Copyright © 1996, American Society for Microbiology
Pathogenesis of murine enterovirus myocarditis: virus dissemination and immune cell targets
Institute for Pathology, Department of Molecular Pathology, University of Tubingen, Germany. Karin.Klingel@uni-tuebingen.de
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