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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Increased plasma protein binding of propranolol and chlorpromazine mediated by disease-induced elevations of plasma alpha1 acid glycoprotein.

To assess the importance of disease-induced increases in plasma concentrations of alpha1 acid glycoprotein (an acute-phase plasma protein that binds cationic drugs), we determined binding of propranolol in plasma from 53 patients and 25 healthy volunteers. Binding was increased in 10 patients with Crohn's disease (P less than 0.002), nine with inflammatory arthritis (P less than 0.002) and eight with chronic renal failure with superimposed inflammatory disease (P less than 0.01) as compared with healthy controls. The plasma binding of control subjects did not differ from that of 12 patients with chronic hepatic disease (P greater than 0.45) or 14 with uncomplicated renal failure (P greater than 0.80). Chlorpromazine binding, determined in 60 subjects, yielded similar results. Percentage of free drug and alpha1 acid glycoprotein concentration were inversely correlated (r = -0.77 with propranolol, P less than 0.001, and r = -0.69 with chlorpromazine, P less than 0.001). Increases in plasma protein binding in patients with inflammatory disease appear mediated by increases in alpha1 acid glycoprotein concentration, which may influence drug kinetics.[1]

References

  1. Increased plasma protein binding of propranolol and chlorpromazine mediated by disease-induced elevations of plasma alpha1 acid glycoprotein. Piafsky, K.M., Borgá, O., Odar-Cederlöf, I., Johansson, C., Sjöqvist, F. N. Engl. J. Med. (1978) [Pubmed]
 
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