title: Wild-type measles virus infection in human CD46/CD150-transgenic mice: CD11c-positive dendritic cells establish systemic viral infection.
abstract: We generated transgenic (TG) mice that constitutively express human CD46 (huCD46) and/or TLR-inducible CD150 (huCD150), which serve as receptors for measles virus (MV). These mice were used to study the spreading and pathogenicity of GFP-expressing or intact laboratory-adapted Edmonston and wild-type Ichinose (IC) strains of MV. Irrespective of the route of administration, neither type of MV was pathogenic to these TG mice. However, in ex vivo, limited replication of IC was observed in the spleen lymphocytes from huCD46/huCD150 TG and huCD150 TG, but not in huCD46 TG and non-TG mice. In huCD150-positive TG mouse cells, CD11c-positive bone marrow-derived myeloid dendritic cells (mDC) participated in MV-mediated type I IFN induction. The level and induction profile of IFN-beta was higher in mDC than the profile of IFN-alpha. Wild-type IC induced markedly high levels of IFN-beta compared with Edmonston in mDC, as opposed to human dendritic cells. We then generated huCD46/huCD150 TG mice with type I IFN receptor (IFNAR1)-/- mice. MV-bearing mDCs spreading to draining lymph nodes were clearly observed in these triple mutant mice in vivo by i.p. MV injection. Infectious lymph nodes were also detected in the double TG mice into which MV-infected CD11c-positive mDCs were i.v. transferred. This finding suggests that in the double TG mouse model mDCs once infected facilitate systemic MV spreading and infection, which depend on mDC MV permissiveness determined by the level of type I IFN generated via IFNAR1. Although these results may not simply reflect human MV infection, the huCD150/huCD46 TG mice may serve as a useful model for the analysis of MV-dependent modulation of mDC response.
authors.affiliation: Department of Immunology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
authors.forename: Masashi
authors.initials: M
authors.lastname: Shingai
authors.forename: Naokazu
authors.initials: N
authors.lastname: Inoue
authors.forename: Tsuyoshi
authors.initials: T
authors.lastname: Okuno
authors.forename: Masaru
authors.initials: M
authors.lastname: Okabe
authors.forename: Takashi
authors.initials: T
authors.lastname: Akazawa
authors.forename: Yasuhide
authors.initials: Y
authors.lastname: Miyamoto
authors.forename: Minoru
authors.initials: M
authors.lastname: Ayata
authors.forename: Kenya
authors.initials: K
authors.lastname: Honda
authors.forename: Mitsue
authors.initials: M
authors.lastname: Kurita-Taniguchi
authors.forename: Misako
authors.initials: M
authors.lastname: Matsumoto
authors.forename: Hisashi
authors.initials: H
authors.lastname: Ogura
authors.forename: Tadatsugu
authors.initials: T
authors.lastname: Taniguchi
authors.forename: Tsukasa
authors.initials: T
authors.lastname: Seya
mesh_terms: D000818:Animals; D015703:Antigens, CD / Q000502:physiology*; D039521:CD11c Antigen / Q000032:analysis*; D002522:Chlorocebus aethiops; D003713:Dendritic Cells / Q000502:physiology* / Q000821:virology; D006023:Glycoproteins / Q000502:physiology*; D006801:Humans; D007136:Immunoglobulins / Q000502:physiology*; D007370:Interferon Type I / Q000502:physiology; D008457:Measles / Q000276:immunology*; D051916:Membrane Cofactor Protein; D008562:Membrane Glycoproteins / Q000502:physiology*; D051379:Mice; D008822:Mice, Transgenic; D011956:Receptors, Cell Surface; D017471:Receptors, Interferon / Q000502:physiology; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1; D014709:Vero Cells; D014779:Virus Replication
chemical_list: D015703:Antigens, CD; D039521:CD11c Antigen; C497857:CD46 protein, human; D006023:Glycoproteins; D007136:Immunoglobulins; D007370:Interferon Type I; C497859:Mcp protein, mouse; D051916:Membrane Cofactor Protein; D008562:Membrane Glycoproteins; D011956:Receptors, Cell Surface; D017471:Receptors, Interferon; C000604059:SLAMF1 protein, human; D000071177:Signaling Lymphocytic Activation Molecule Family Member 1