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. 1986 Sep;78(3):827–831. doi: 10.1172/JCI112647

Receptor recognition of maleyl-albumin induces chemotaxis in human monocytes.

M E Haberland, R R Rasmussen, A M Fogelman
PMCID: PMC423682  PMID: 3018045

Abstract

We demonstrate here that the exceptionally active maleyl-albumin receptor of human monocytes functions in vitro as a chemoattractant receptor. Chemotaxis of human monocytes occurs at an effective median dose of 3-4 microM maleyl-albumin, a concentration representing 1% of the total albumin in the adult human. Computerized analyses by LIGAND of the saturable binding of maleyl-albumin to human monocytes reveal two classes of binding sites, described by dissociation constants of 37 nM and 5.3 microM with maximal binding of 1.6 and 23 pmol maleyl-albumin/mg cellular protein, respectively. Chemotaxis of human monocytes thus occurs at concentrations of maleyl-albumin promoting binding to the lower-affinity sites. We propose that conformational isomers of albumin that are chemotactic may form in vivo and that albumin, in addition to receptor-independent plasma transport functions, may also play an important role in the receptor-mediated recruitment and accumulation of phagocytic cells at sites of inflammation and injury.

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Selected References

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