Lactoferrin acts on Ia-like antigen-positive subpopulations of human monocytes to inhibit production of colony stimulatory activity in vitro

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Abstract

The relationship between Ia-like antigens (Ia-antigens) on human monocytes and the ability of lactoferrin (LF) to inhibit the production of colony stimulatory activity (CSA) for granulocyte and macrophage colony formation was investigated. Complement-dependent cytotoxicity of human monocytes by antiserum to Ia-antigen reduced CSA production by 50%. LF decreased CSA production by monocytes but had no influence on monocytes insensitive to anti-Ia and complement. Anti-Ia in the absence of complement had no effect on production of CSA but blocked the inhibitory action of LF. This suggests that LF inhibits production of CSA fromn an Ia-antigen-positive subpopulation of human blood monocytes. This may be of relevance to the regulation of myelopoiesis.

Original languageEnglish (US)
Pages (from-to)1717-1720
Number of pages4
JournalJournal of Clinical Investigation
Volume64
Issue number6
DOIs
StatePublished - Jan 1 1979
Externally publishedYes

ASJC Scopus subject areas

  • Medicine(all)

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