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Reconstitution of huPBL-NSG Mice with Donor-Matched Dendritic Cells Enables Antigen-Specific T-cell Activation
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  • 作者:Airi Harui (1)
    Sylvia M. Kiertscher (1)
    Michael D. Roth (1) (3)
  • 关键词:dendritic cell ; adenovirus ; vaccination ; xenotransplant ; cytokine ; humanized mouse
  • 刊名:Journal of Neuroimmune Pharmacology
  • 出版年:2011
  • 出版时间:March 2011
  • 年:2011
  • 卷:6
  • 期:1
  • 页码:148-157
  • 全文大小:347KB
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  • 作者单位:Airi Harui (1)
    Sylvia M. Kiertscher (1)
    Michael D. Roth (1) (3)

    1. Division of Pulmonary & Critical Care Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095-1690, USA
    3. Division of Pulmonary & Critical Care Medicine, Department of Medicine, David Geffen School of Medicine at UCLA, Los Angeles, CA, 90095-1690, USA
  • ISSN:1557-1904
文摘
Humanized mouse models provide a unique opportunity to study human immune cells in vivo, but traditional models have been limited to the evaluation of non-specific T-cell interactions due to the absence of antigen-presenting cells. In this study, immunodeficient NOD/SCID/IL2r-γnull (NSG) mice were engrafted with human peripheral blood lymphocytes alone or in combination with donor-matched monocyte-derived dendritic cells (DC) to determine whether antigen-specific T-cell activation could be reconstituted. Over a period of 3?weeks, transferred peripheral blood lymphocytes reconstituted the spleen and peripheral blood of recipient mice with predominantly human CD45-positive lymphocytes. Animals exhibited a relatively normal CD4/CD8 ratio (average 1.63:1) as well as reconstitution of CD3/CD56 (averaging 17.8%) and CD20 subsets (averaging 4.0%). Animals reconstituted with donor-matched CD11c+ DC also demonstrated a CD11c+ population within their spleen, representing 0.27% to 0.43% of the recovered human cells with concurrent expression of HLA-DR, CD40, and CD86. When immunized with adenovirus, either as free replication-incompetent vector (AdV) or as vector-transduced DC (DC/AdV), there was activation and expansion of AdV-specific T-cells, an increase in Th1 cytokines in serum, and skewing of T-cells toward an effector/memory phenotype. T-cells recovered from animals challenged with AdV in vivo proliferated and secreted a Th1-profile of cytokines in response to DC/AdV challenge in vitro. Our results suggest that engrafting NSG mice with a combination of lymphocytes and donor-matched DC can reconstitute antigen responsiveness and allow the in vivo assessment of human immune response to viruses, vaccines, and other immune challenges.

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