| Literature DB >> 2419908 |
E Méndez, J L Fernández-Luna, A Grubb, F Leyva-Cobián.
Abstract
Protein HC, a heterogeneously charged low molecular weight glycoprotein, and its IgA complex were isolated from human plasma and urine. Plasma from individuals with monoclonal IgA populations was used as starting material for the isolation of the protein HC-IgA complex to obtain homogeneous complex populations. Neither low molecular weight protein HC nor its IgA complex in the concentrations 30 and 600 mg/liter influenced the random migration of normal human neutrophils. The chemotactic response of neutrophils to endotoxin-activated serum was, however, attenuated in a dose-dependent way by both low molecular weight protein HC and protein HC-IgA complex. Concentrations of protein HC and its IgA complex producing significant inhibition of the chemotactic response were found to occur in plasma from healthy and diseased individuals as well as in synovial fluid from patients with rheumatoid arthritis. These results suggest that protein HC and its IgA complex play physiological roles in the regulation of the inflammatory response.Entities:
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Year: 1986 PMID： 2419908 PMCID： PMC323098 DOI： 10.1073/pnas.83.5.1472
Source DB: PubMed Journal: Proc Natl Acad Sci U S A ISSN： 0027-8424 Impact factor: 11.205