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

Binding of iralukast to serum proteins and erythrocytes: measurements using ultrafiltration and an erythrocyte partitioning method.

The binding of iralukast to plasma (or serum) proteins and to erythrocytes was studied in vitro, at +37 degrees C, using the erythrocyte partitioning method (EPM) and/or ultrafiltration (UF) with 14C-labelled iralukast. Iralukast was highly bound in human and animal serum (>99%). Similar bound fraction values were obtained with the two methods: in whole human plasma (or serum) 99.8% (EPM) and 99.9% (UF), in albumin solution 99.8% (EPM and UF), in high density lipoprotein solution 97.3% (EPM) and 98.3% (UF), and in low density lipoprotein solution 97.2% (EPM) and 98.8% (UF). Moreover, the erythrocyte partitioning method allowed the evaluation of other binding parameters. The binding capacity (l/micromol) of proteins equalled 35 for low density lipoproteins, 3.6 for high density lipoproteins, 1.0 for albumin, 0.78 for alpha-1-acid glycoprotein, and 0.03 for gamma globulins. In whole blood, iralukast was distributed between plasma and erythrocytes in the proportion (%) 90/10. At physiological protein concentrations, iralukast was primarily bound to albumin (79%).[1]

References

  1. Binding of iralukast to serum proteins and erythrocytes: measurements using ultrafiltration and an erythrocyte partitioning method. Colussi, D., Parisot, C., Lefèvre, G. European journal of pharmaceutical sciences : official journal of the European Federation for Pharmaceutical Sciences. (1999) [Pubmed]
 
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