title: Plasma protein binding of imipramine in patients with rheumatoid arthritis.
abstract: In 23 patients with rheumatoid arthritis the plasma protein binding of 3H-imipramine and the plasma levels of 13 proteins were measured in order to examine the significance of the proteins for the binding of imipramine. The degree of 3H-imipramine binding did not differ significantly from that in healthy controls. It was positively correlated with the concentrations of fibrinogen, alpha 1-acid-glycoprotein, ceruloplasmin, complement C3c, haptoglobin and hemopexin. Erythrocyte sedimentation rate was also highly positively correlated with binding. The concentration of several of the proteins showed a significant covariation. The 3H-imipramine binding was negatively correlated with the concentration of albumin and the latter was negatively correlated with some of the proteins mentioned-above. No correlation with the levels of apolipoproteins A and B was found. There appears to be more a qualitative than a quantitative change in 3H-imipramine binding in patients with rheumatoid arthritis.
mesh_terms: D000375:Aging; D001172:Arthritis, Rheumatoid / Q000097:blood*; D001798:Blood Proteins / Q000378:metabolism*; D006801:Humans; D007099:Imipramine / Q000097:blood*; D011485:Protein Binding
chemical_list: D001798:Blood Proteins; D007099:Imipramine