Fibrinogen association with human monocytes: evidence for constitutive expression of fibrinogen receptors and for involvement of Mac-1 (CD18, CR3) in the binding

Trezzini, C; Jungi, Thomas; Kuhnert, Peter; Peterhans, Ernst (1988). Fibrinogen association with human monocytes: evidence for constitutive expression of fibrinogen receptors and for involvement of Mac-1 (CD18, CR3) in the binding. Biochemical and biophysical research communications, 156(1), pp. 477-484. Academic Press 10.1016/S0006-291X(88)80866-0

Text Trezzini_Fibrinogen.pdf - Published Version Restricted to registered users only Available under License Publisher holds Copyright. Download (442kB)

Radiolabeled fibrinogen (Fg) specifically binds to mononuclear leukocytes (MNL) and to purified monocytes, but not to nylon-nonadherent lymphocytes. The association is rapid, Ca++-dependent and reversible. MNL containing Fg-binding monocytes had not been exposed to endotoxin (less than 4 pg/mL) during the isolation and the binding test, and Fg binding was not altered by preincubation of MNL with lipopolysaccharide. The binding of Fg was inhibited by anti-Mac-1 antibodies (OKM1). Antibodies to surface-bound Fg were able to induce luminol-dependent chemiluminescence, indicating that Fg binding sites have receptor function. Emission of a signal depended on MNL exposure to Fg, on specific, divalent antibodies, but not on the antibody Fc portion. These data show that human monocytes constitutively express specific Fg receptors and suggest that Mac-1, a member of the integrin superfamily, is involved in Fg recognition.

Interest & Impact

Downloads

21 since deposited on 14 Sep 2015
4 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item