5. PK parameters and PARP inhibition following twice daily fluzoparib dosing.
PK Parameter | 80 mg bid (n=10) | 100 mg bid (n=13) | 150 mg bid (n=13) | ||||||||
Mean | SD | CV (%) | Mean | SD | CV (%) | Mean | SD | CV (%) | |||
PK, pharmacokinetic; PARP, poly(ADP-ribose) polymerases; Tmax, time to peak concentration (Cmax); Css,max, Cmax at steady state; Css,min, minimum concentration at steady state; Css,avg, average steady-state concentration; AUC0–10 h, area under the curve from time 0 to10 h; λz, first-order rate constant of terminal phase; t1/2, terminal half-life; CLss/F, apparent total clearance of the drug at steady state; Vz/F, apparent volume of distribution; DF, coefficient of fluctuation; Rac_Cmax, accumulation in terms of Cmax; Rac_AUC, accumulation in terms of AUC; SD, standard deviation; CV, coefficient of variation. | |||||||||||
Tmax(h) | 2.50 (1.00−3.00) | − | − | 3.00 (2.00−6.00) | − | − | 3.00 (1.00−4.00) | − | − | ||
Css,max(μg/mL) | 5.18 | 1.68 | 32.4 | 5.94 | 2.99 | 50.3 | 8.45 | 1.83 | 21.6 | ||
Css,min(μg/mL) | 2.69 | 1.07 | 39.8 | 3.15 | 1.96 | 62.4 | 4.06 | 1.05 | 25.8 | ||
Css,avg (μg/mL) | 3.82 | 1.26 | 32.8 | 4.52 | 2.55 | 56.4 | 6.08 | 1.34 | 22.1 | ||
AUC0−10 h(h·μg/mL) | 38.2 | 12.6 | 32.8 | 45.2 | 25.5 | 56.4 | 60.8 | 13.4 | 22.1 | ||
λz(1/h) | 0.0706 | 0.0286 | 40.5 | 0.0763 | 0.0306 | 40.1 | 0.0800 | 0.0177 | 22.2 | ||
t1/2(h) | 11.40 | 4.86 | 42.6 | 10.80 | 4.78 | 44.4 | 9.14 | 2.38 | 26.0 | ||
CLss/F (L/h) | 2.31 | 0.76 | 32.9 | 2.96 | 1.69 | 57.0 | 2.58 | 0.57 | 22.0 | ||
Vz/F (L) | 35.8 | 14.9 | 41.6 | 38.5 | 27.6 | 71.6 | 34.6 | 14.5 | 41.9 | ||
DF (%) | 66.7 | 12.0 | 18.0 | 68.1 | 17.8 | 26.2 | 73.2 | 17.3 | 23.7 | ||
Rac_Cmax | 2.09 | 0.52 | 24.7 | 1.73 | 0.41 | 23.4 | 1.76 | 0.33 | 18.7 | ||
Rac_AUC | 2.23 | 0.51 | 22.8 | 2.08 | 0.39 | 18.5 | 1.86 | 0.35 | 18.7 |