Detection of shedding of human blood monocyte fc receptor during in vitro culture

Neil E. Kay, Steven D. Douglas

Research output: Contribution to journalArticlepeer-review

2 Scopus citations


Human monocytes, isolated from peripheral blood and placed in culture, produce supernatants that have Fc receptor activity. This activity is detectable using a complement-dependent h emolytic assay. Inhibition of hemolysis is detected with undiluted supernatants, is temperature-dependent and is not demonstrable with culture supernatants from Fc-receptor-negative endothelial cells. To more completely determine that monocyte supernatants contained shed Fc receptors, inhibition of direct Fc rosettes by the same supernatants was demonstrated. The supernatants are most active for Fc receptor activity after monocytes are cultured for 7–9 days. The activity of Fc receptor material varied among donors. Monocyte culture supernatants may be utilized as sources of monocyte Fc receptor material for future evaluation.

Original languageEnglish (US)
Pages (from-to)131-135
Number of pages5
JournalInternational archives of allergy and immunology
Issue number2
StatePublished - 1981

ASJC Scopus subject areas

  • Immunology and Allergy
  • Immunology


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