TABLE 1

Summary of micafungin saturable and nonsaturable uptake kinetics in SCRH and SCHH

Mean ± S.D. kinetic parameters reflecting micafungin uptake were obtained by nonlinear regression using a model incorporating both a saturable (Michaelis-Menten) component and a nonsaturable (linear) component. Taurocholate uptake clearance values in the two SCRH cultures used here were 22.5 ± 4.8 and 28.5 ± 2.6 μl/(min · mg protein).

Kinetic ParameterRatHuman
Km (μM)39 ± 640 ± 5
Vmax [pmol/(min · mg protein)]591 ± 24814 ± 248
Cld [μl/(min · mg protein)]3.8 ± 0.33.3 ± 0.5
Vmax/Km [μl/(min · mg protein)]15.2 ± 4.420.5 ± 2.2