title: OX40-deficient mice are defective in Th cell proliferation but are competent in generating B cell and CTL Responses after virus infection.
abstract: OX40, a member of the TNF receptor superfamily, is expressed on activated T cells and implicated in stimulation of T cells and T-dependent humoral responses. We generated OX40-/- mice and found that the formation of extrafollicular plasma cells, germinal centers, and antibody responses was independent of OX40. After infection with LCMV and influenza virus, OX40-/- mice retain primary and memory cytotoxic T cell responses with normal expansion and decline of specific CTL. In contrast, CD4+ T cell proliferation and the number of IFN-gamma-producing CD4+ T cells were reduced in OX40-/- mice. Moreover, the number of CD4+ T cells infiltrating the lungs of influenza virus-infected OX40-/- mice was reduced. These results define a unique role of OX40 in the generation of optimal CD4+ T cell responses in vivo.
authors.affiliation: Basel Institute for Immunology, Basel, Switzerland. kopf@bii.ch
authors.forename: M
authors.initials: M
authors.lastname: Kopf
authors.forename: C
authors.initials: C
authors.lastname: Ruedl
authors.forename: N
authors.initials: N
authors.lastname: Schmitz
authors.forename: A
authors.initials: A
authors.lastname: Gallimore
authors.forename: K
authors.initials: K
authors.lastname: Lefrang
authors.forename: B
authors.initials: B
authors.lastname: Ecabert
authors.forename: B
authors.initials: B
authors.lastname: Odermatt
authors.forename: M F
authors.initials: MF
authors.lastname: Bachmann
mesh_terms: D000818:Animals; D000914:Antibodies, Viral / Q000276:immunology; D001402:B-Lymphocytes / Q000276:immunology* / Q000821:virology; D015496:CD4-Positive T-Lymphocytes / Q000276:immunology / Q000821:virology; D002455:Cell Division; D002460:Cell Line; D004285:Dogs; D005260:Female; D006801:Humans; D009980:Influenza A virus / Q000276:immunology; D008217:Lymphocytic choriomeningitis virus / Q000276:immunology; D008297:Male; D051379:Mice; D008810:Mice, Inbred C57BL; D018345:Mice, Knockout; D053262:Receptors, OX40; D018124:Receptors, Tumor Necrosis Factor / Q000235:genetics / Q000276:immunology*; D013602:T-Lymphocytes, Cytotoxic / Q000276:immunology* / Q000821:virology; D006377:T-Lymphocytes, Helper-Inducer / Q000276:immunology* / Q000821:virology; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7 / Q000235:genetics / Q000276:immunology*; D014721:Vesicular stomatitis Indiana virus / Q000276:immunology; D014777:Virus Diseases / Q000276:immunology*
chemical_list: D000914:Antibodies, Viral; D053262:Receptors, OX40; D018124:Receptors, Tumor Necrosis Factor; C505716:TNFRSF4 protein, human; C505717:Tnfrsf4 protein, mouse; D018127:Tumor Necrosis Factor Receptor Superfamily, Member 7