Isolation of variants in phagocytosis of a macrophage-like continuous cell line* Academic Article Article uri icon


MeSH Major

  • Emergency Service, Hospital
  • National Health Programs


  • We have isolated cloned variants in phagocytosis from a cloned continuous murine macrophage-like cell line, J 774.2. A selection procedure against Fc receptor-mediated phagocytosis was devised using IgG-coated SRBC containing a toxic drug, tubercidin, as the lethal agent. A series of variant clones deficient in Fc receptor-mediated phagocytosis were isolated. Such variants occurred at low frequency (approximately 6 X 10(-5)), were stable, and appeared to possess Fc receptors. The degree to which they were defective in phagocytosis of IgG-coated SRBC varied from clone to clone, yet all clones, were able to phagocytize latex particles. The phagocytic defect in some variants could be corrected by the addition of 8 Br-cAMP, in others, the drug was without effect. It is likely, therefore, that different variants are defective in several distinct steps critical to Fc receptor-mediated phagocytosis.

publication date

  • January 1977



  • Academic Article


Digital Object Identifier (DOI)

  • 10.1084/jem.145.1.175

PubMed ID

  • 187717

Additional Document Info

start page

  • 175

end page

  • 86


  • 145


  • 1