The primary objectives of this study are to evaluate the single-dose pharmacokinetics (PK) of firsocostat in adults with normal hepatic function, and mild, moderate, or severe hepatic impairment and to evaluate the single-dose PK of fenofibrate in adults with normal hepatic function and mild hepatic impairment.
Study Type
INTERVENTIONAL
Allocation
NON_RANDOMIZED
Purpose
TREATMENT
Masking
NONE
Enrollment
74
Capsule(s) administered orally on Day 1
Tablet administered orally on Day 1
Unnamed facility
Tustin, California, United States
Unnamed facility
Miami, Florida, United States
Unnamed facility
Orlando, Florida, United States
Unnamed facility
Minneapolis, Minnesota, United States
Unnamed facility
San Antonio, Texas, United States
Pharmacokinetic (PK) Parameter: AUClast of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
AUClast is defined as the concentration of drug from time zero to the last observable concentration. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: AUCinf of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
AUCinf is defined as the concentration of drug extrapolated to infinite time. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: Cmax of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
Cmax is defined as the maximum observed concentration of drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: % AUCexp of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
%AUCexp is defined as the percentage of AUC extrapolated between AUClast and AUCinf. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
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Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: Tmax of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
Tmax is defined as the time (observed time point) of Cmax. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: Clast of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
Clast is defined as the last observed quantifiable concentration of drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: Tlast of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
Tlast is defined as the time (observed time point) of Clast. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: λz of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
λz is defined as the terminal elimination rate constant, estimated by linear regression of the terminal elimination phase of the log plasma concentration of drug versus time curve of the drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: CL/F of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
CL/F is defined as the apparent oral clearance following administration of the drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: Vz/F of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
Vz/F is defined as the apparent volume of distribution of the drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
PK Parameter: t1/2 of Firsocostat, GS-834773 (Primary Metabolite of Firsocostat), and Fenofibric Acid (Primary Metabolite of Fenofibrate)
t1/2 is defined as the estimate of the terminal elimination half-life of the drug. The PK of fenofibric acid was evaluated in participants with mild hepatic impairment and matched participants with normal hepatic function (Cohort 4).
Time frame: Day 1: 0 (predose, ≤ 5 minutes prior to dosing), 0.5, 1, 2, 3, 4, 6, 8, 10, 12, 16, 24, 48, 72, and 96 hours postdose; or 72 hours of early termination from the study (if applicable)
Percentage of Participants Experiencing Treatment-Emergent Adverse Events (AEs)
Treatment-emergent adverse events (TEAEs) were defined as 1 or both of the following: * Any AEs with an onset date on or after the study drug start date and no later than 30 days after permanent discontinuation of study drug. If the AE onset date is the same as the date of study drug start date then the AE onset time must be on or after the study drug start time. If the AE onset time is missing when the start dates are the same, the AE will be considered treatment emergent. * Any AEs leading to premature discontinuation of study drug.
Time frame: First dose date plus 30 days
Percentage of Participants Experiencing Laboratory Abnormalities
Treatment-emergent laboratory abnormalities are defined as values that increase at least 1 toxicity grade from predose at any postdose visit, up to and including the date of last dose of study drug plus 30 days for subjects who permanently discontinued study drug. The most severe graded abnormality from all tests was counted for each participant.
Time frame: First dose date plus 30 days