title: Role of virus-specific CD4+ cytotoxic T cells in recovery from mouse hepatitis virus infection.
abstract: Macrophages and T lymphocytes play an important role in recovery from viral infections. During mouse hepatitis virus (MHV-A59) infection, a clear virus-specific class II-restricted cytotoxic T-cell response is generated. Transfer of these CD4+ cytotoxic T cells (CTL) into naive mice protects against a lethal challenge with MHV. However, their in vivo antiviral effector mechanism is not yet clear. To further investigate a possible effector mechanism, we studied the effect of adoptive transfer of CD4+ CTL on virus localization in spleen and liver. We showed that adoptive transfer of virus-specific T cells does not affect localization of MHV-A59 in different macrophage subsets. Interestingly, a rapid and large infiltrate of CD4+ T cells in and around MHV-A59-infected foci in the liver was observed early in infection, whereas no CD8+ T cells were detectable. Moreover, transfer of virus-specific T cells resulted in significantly decreased viral titres in the liver and spleen and a marginally increased anti-MHV-A59 IgM production. These results imply an important role for virus-specific CD4+ CTL in elimination of infectious MHV-A59 and induction of an effective immune response in the absence of CD8+ CTL.
authors.affiliation: Department of Cell Biology and Immunology, Vrije Universiteit, Amsterdam.
authors.forename: O L
authors.initials: OL
authors.lastname: Wijburg
authors.forename: M H
authors.initials: MH
authors.lastname: Heemskerk
authors.forename: A
authors.initials: A
authors.lastname: Sanders
authors.forename: C J
authors.initials: CJ
authors.lastname: Boog
authors.forename: N
authors.initials: N
authors.lastname: Van Rooijen
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000096:biosynthesis; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology* / Q000637:transplantation; D018929:Cell Culture Techniques; D018352:Coronavirus Infections / Q000276:immunology* / Q000628:therapy; D006524:Hepatitis, Viral, Animal / Q000276:immunology* / Q000628:therapy; D016219:Immunotherapy, Adoptive; D008099:Liver / Q000821:virology; D017710:Lymphocyte Transfusion; D008297:Male; D051379:Mice; D008807:Mice, Inbred BALB C; D006517:Murine hepatitis virus / Q000276:immunology / Q000302:isolation & purification; D013154:Spleen / Q000821:virology; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000637:transplantation
chemical_list: D000914:Antibodies, Viral