Wild-type measles virus infection in human CD46/CD150-transgenic mice: CD11c-positive dendritic cells establish systemic viral infection.
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.
Shingai
Masashi
M
Department of Immunology, Osaka Medical Center for Cancer and Cardiovascular Diseases, Osaka, Japan.
Inoue
Naokazu
N
Okuno
Tsuyoshi
T
Okabe
Masaru
M
Akazawa
Takashi
T
Miyamoto
Yasuhide
Y
Ayata
Minoru
M
Honda
Kenya
K
Kurita-Taniguchi
Mitsue
M
Matsumoto
Misako
M
Ogura
Hisashi
H
Taniguchi
Tadatsugu
T
Seya
Tsukasa
T
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
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