Expression of infectious murine leukemia viruses by RAW264.7 cells, a potential complication for studies with a widely used mouse macrophage cell line

Retrovirology. 2008 Jan 4;5:1. doi: 10.1186/1742-4690-5-1.


The mouse macrophage-like cell line RAW264.7, the most commonly used mouse macrophage cell line in medical research, was originally reported to be free of replication-competent murine leukemia virus (MuLV) despite its origin in a tumor induced by Abelson MuLV containing Moloney MuLV as helper virus. As currently available, however, we find that it produces significant levels of ecotropic MuLV with the biologic features of the Moloney isolate and also MuLV of the polytropic or MCF class. Newborn mice developed lymphoma following inoculation with the MuLV mixture expressed by these cells. These findings should be considered in interpretation of increasingly widespread use of these cells for propagation of other viruses, studies of biological responses to virus infection and use in RNA interference and cell signalling studies.

Publication types

  • Research Support, N.I.H., Intramural

MeSH terms

  • Abelson murine leukemia virus / metabolism
  • Abelson murine leukemia virus / pathogenicity
  • Animals
  • Animals, Newborn
  • Cell Line
  • Leukemia Virus, Murine / classification
  • Leukemia Virus, Murine / metabolism*
  • Leukemia Virus, Murine / pathogenicity*
  • Leukemia, Experimental / pathology
  • Leukemia, Experimental / virology
  • Macrophages / virology*
  • Mice
  • Mice, Inbred BALB C
  • Moloney murine leukemia virus / metabolism
  • Moloney murine leukemia virus / pathogenicity
  • NIH 3T3 Cells
  • Retroviridae Infections / pathology
  • Retroviridae Infections / virology
  • Tumor Virus Infections / pathology
  • Tumor Virus Infections / virology
  • Viral Proteins / genetics
  • Viral Proteins / metabolism
  • Virus Replication


  • Viral Proteins