Dược Động Học :
▧ Absorption :
Food increase the exposure of bosutinib.
Tmax, single dose, cancer patients, fed-state = 4-6 hours;
After 15 daily doses of bosutinib 500 mg with food in CML patients, the pharmacokinetic parameters are as follows:
Cmax = 200 ng/mL;
AUC = 3650 ng∙h/mL
▧ Volume of Distribution :
Apparent volume of distribution = 6080 ± 1230 L.
▧ Protein binding :
94% bound to human plasma proteins in vitro. 96% bound to human plasma proteins in healthy subjects ex vivo. Extent of protein binding is not concentration-dependent.
▧ Metabolism :
Bosutinib is primarily metabolized by CYP3A4. The major circulating metabolites identified in plasma are oxydechlorinated (M2) bosutinib (19% of parent exposure) and N-desmethylated (M5) bosutinib (25% of parent exposure), with bosutinib N-oxide (M6) as a minor circulating metabolite. All the metabolites were deemed inactive.
▧ Route of Elimination :
When given a single oral dose, 91.3% of the dose was recovered in feces and 3% of the dose recovered in urine.
▧ Half Life :
Terminal phase elimination half-life, single oral dose, fed-state = 22.5 hours
▧ Clearance :
Mean clearance (CL/F), single oral dose, fed-state = 189 L/h