Modulation of CD163 receptor expression and replication of porcine reproductive and respiratory syndrome virus in porcine macrophages

Virus Res. 2009 Mar;140(1-2):161-71. doi: 10.1016/j.virusres.2008.12.002. Epub 2009 Jan 10.


Porcine reproductive and respiratory syndrome virus (PRRSV) has a specific cell tropism for differentiated macrophages, such as porcine alveolar macrophages (PAMs). We analyzed the expression of CD163 on PAMs and macrophages derived from CD14 positive blood monocytes (MDMs), in correlation with PRRSV replication. By flow cytometry analysis, we showed that the levels of CD163 expression correlated well with the overall level of PRRSV replication. We further examined the effects of modulators of macrophage function, including 12-O-tetradecanoylphorbol-13-acetate (TPA), lipopolysaccharide (LPS), and interleukin (IL)-10 on the expression of CD163 and PRRSV replication. Pre-treatment of PAMs or MDMs with TPA or LPS resulted in decreased expression of CD163 and reduction in PRRSV replication. On the contrary, the incubation of CD14 positive monocytes with IL-10 during differentiation into MDMs resulted in up-regulated expression of CD163 with a corresponding increase in PRRSV infection. These data indicate that the expression of CD163 on macrophages in different microenvironments, in vivo, may determine the replication efficiency and subsequent pathogenecity of PRRSV.

Publication types

  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Animals
  • Antibodies, Monoclonal / pharmacology
  • Antigens, CD / metabolism*
  • Antigens, Differentiation, Myelomonocytic / metabolism*
  • Cell Line
  • Gene Expression Regulation
  • Interleukin-10 / pharmacology
  • Lipopolysaccharide Receptors / metabolism
  • Lipopolysaccharides / pharmacology
  • Macrophages, Alveolar / drug effects
  • Macrophages, Alveolar / metabolism*
  • Macrophages, Alveolar / virology
  • Porcine Reproductive and Respiratory Syndrome / metabolism*
  • Porcine Reproductive and Respiratory Syndrome / virology
  • Porcine respiratory and reproductive syndrome virus / physiology*
  • Receptors, Cell Surface / metabolism*
  • Swine / metabolism*
  • Swine / virology
  • Tetradecanoylphorbol Acetate / pharmacology
  • Virus Replication*


  • Antibodies, Monoclonal
  • Antigens, CD
  • Antigens, Differentiation, Myelomonocytic
  • CD163 antigen
  • Lipopolysaccharide Receptors
  • Lipopolysaccharides
  • Receptors, Cell Surface
  • Interleukin-10
  • Tetradecanoylphorbol Acetate