Open-Systems-Pharmacology / Fluvoxamine-Model

Whole-body PBPK model of fluvoxamine as CYP1A2 and CYP3A4 DDI perpetrator drug
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Source of inhibition constant for CYP3A4 not clear #9

Open AndreDlm opened 3 years ago

AndreDlm commented 3 years ago

I have some difficulties understanding where the Ki of fluvoxamine for CYP3A4 comes from. In the PK-Sim file (and this publication here) the following sources are given for this value:

Yao et al. report a fu in liver microsomes of, on average, 0.33 but no Ki for CYP3A4. Olesen et al. report a Ki of 24 ± 1.8 µM (SEM). In PK-Sim there is a Ki,u 1.6 µM which would correspond to a fu,mic of 0.067.