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

Pharmacokinetics of iodoxamic acid in rhesus monkey: biliary excretion, plasma protein binding, and enterophepatic circulation.

The previously reported steady-state method allowed estimation of the capacity-limited pharmacokinetics of the cholangiographic agent, iodipamide. To circumvent the long time period required to establish each steady-state level, a dynamic method was applied to the study of the rate processes involved in the hepatic uptake and biliary excretion of a new cholangiographic agent, iodoxamic acid, in rhesus monkeys. The dynamic method has the advantage that the pharmacokinetic parameters involved in capacity-limited hepatic uptake or biliary excretion can be obtained from a single infusion experiment. The V max was 1.03 +/- 0.25 mumoles/kg/min (mean +/- SD); Km varied from animal to animal and ranged from 1.5 to 16.4 micrometer. Protein binding was estimated using equilibrium dialysis. The Freundlich isotherm yielded a linear plot when the natural logarithm of unbound iodoxamic acid concentration in plasma was plotted against the natural logarithm of its blood concentration. The plasma protein binding data also could be fitted to the Langmuir isotherm, presuming two independent classes of binding.[1]

References

  1. Pharmacokinetics of iodoxamic acid in rhesus monkey: biliary excretion, plasma protein binding, and enterophepatic circulation. Lin, S.K., Moss, A.A., Motson, R., Riegelman, S. Journal of pharmaceutical sciences. (1978) [Pubmed]
 
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