Plasmacytoid dendritic cells activated by influenza virus and CD40L drive a potent TH1 polarization - PubMed (original) (raw)
Plasmacytoid dendritic cells activated by influenza virus and CD40L drive a potent TH1 polarization
M Cella et al. Nat Immunol. 2000 Oct.
Abstract
Plasmacytoid dendritic cells (PDCs) are a subset of dendritic cells present in human blood and inflamed lymph nodes. Here we show that blood PDCs, when stimulated with influenza virus and CD40L in vitro, undergo a maturation process characterized by up-regulation of major histocompatibility complex proteins and adhesion and costimulatory molecules. In addition, PDCs down-regulate CXCR3 and L-selectin, which mediate migration and homing of these cells into the lymph node. Mature PDCs efficiently stimulate T cells and drive a potent TH1 polarization in vitro, which is mediated by the synergistic effect of interleukin 12 and type 1 interferon. In vivo, mature PDCs are found in secondary lymphoid organs, where they represent the principal source of type 1 interferon during inflammation. Thus, PDCs probably participate in antiviral and pro-inflammatory responses, rather than in TH2 polarization and tolerance induction.
Comment in
- Flexibility and cooperation among dendritic cells.
Patterson S. Patterson S. Nat Immunol. 2000 Oct;1(4):273-4. doi: 10.1038/83644. Nat Immunol. 2000. PMID: 11017093 No abstract available.
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