Bone marrow dendritic cells internalize live RF-81 bovine rotavirus and rotavirus-like particles (RF 2/6-GFP-VLP and RF 8*2/6/7-VLP) but are only activated by live bovine rotavirus

Scand J Immunol. 2007 Jun;65(6):494-502. doi: 10.1111/j.1365-3083.2007.01907.x.

Abstract

Dendritic cells (DC) represent the link between innate and adaptive immunity. They are classified as antigen-presenting cells (APC) and can initiate and modulate the immune response. To investigate the interaction with DCs, live RF-81 bovine rotavirus strain (RFV) and rotavirus-like particles (rota-VLP), RF 2/6-GFP-VLP and rota RF 8*2/6/7-VLP, were added in vitro to murine bone marrow-derived DCs (bmDCs). Live RFV, RF 2/6-GFP-VLP and RF 8*2/6/7-VLP all bound to bmDC and were internalized but only live RFV stimulated phenotypic maturation of the bmDCs as shown by the upregulation of the co-stimulatory molecule CD86. Even though bmDCs internalized RF 2/6-GFP-VLP and RF 8*2/6/7-VLP as efficiently as live RFV, these rota-VLP were not able to activate the cells. Supernatants derived from bmDC cultures treated with live RFV, RF 2/6-GFP-VLP or RF 8*2/6/7-VLP were examined for TNF-alpha production. At 6, 18 and 24 h post-infection, TNF-alpha concentrations were significantly increased in cultures treated with live RFV and rota-VLP compared with untreated cultures. In conclusion, this study showed that live RF-81 bovine rotavirus strain was internalized and induced bmDCs activation, whereas both RF 2/6-GFP-VLP and RF 8*2/6/7-VLP were internalized by bmDCs without triggering their activation.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Animals
  • B7-2 Antigen / analysis
  • B7-2 Antigen / immunology
  • Bone Marrow Cells / immunology*
  • Bone Marrow Cells / metabolism
  • Bone Marrow Cells / virology*
  • Cattle
  • Cells, Cultured
  • Dendritic Cells / immunology*
  • Dendritic Cells / metabolism
  • Dendritic Cells / virology*
  • Flow Cytometry
  • Glycoproteins / biosynthesis
  • Lymphocyte Activation / immunology
  • Mice
  • Mice, Inbred C57BL
  • Microscopy, Confocal
  • Rotavirus / immunology*
  • Rotavirus Infections / immunology*
  • Toxins, Biological / biosynthesis
  • Tumor Necrosis Factor-alpha / biosynthesis
  • Up-Regulation
  • Viral Nonstructural Proteins / biosynthesis
  • Virion / immunology
  • Virus Internalization*

Substances

  • B7-2 Antigen
  • Glycoproteins
  • NS28 protein, rotavirus
  • Toxins, Biological
  • Tumor Necrosis Factor-alpha
  • Viral Nonstructural Proteins