This study is a 2-part study. Part A is a single-dose, open-label study design to determine the PK, safety and tolerability of 5 μg TRK-820 oral administration in subjects with end-stage renal disease (ESRD) who require hemodialysis. Part B is a multiple dose, open-label study design to determine the PK, PD, safety and tolerability of multiple doses in subjects with ESRD who require hemodialysis with refractory uremic pruritus (UP). Each subject will receive 3 doses of TRK-820 (2.5, 5 and 10 μg).
Study Type
INTERVENTIONAL
Allocation
NA
Purpose
TREATMENT
Masking
NONE
Enrollment
23
Bulgaria
Bulgaria, Bulgaria
Germany
Germany, Germany
Pharmacokinetic parameters: area under the time curve from time zero to 24 hours postdose(AUC0-24h)
Time frame: Part A; predose to 24 hours postdose, Part B; predose to 24 hours postdose each dose
Pharmacokinetic parameters: area under the time curve from time zero to the last quantifiable concentration(AUC0-last)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: area under the time curve from time zero extrapolated to infinity(AUC0-inf)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: maximum observed plasma concentration (Cmax)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: time to maximum plasma concentration(Tmax)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: apparent elimination half-life in plasma(t½)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: plasma concentration at 24 hours postdose(C24h)
Time frame: Part A; 24 hours postdose, Part B; 24 hours postdose each dose
Pharmacokinetic parameters: apparent total clearance(CL/F)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: terminal elimination rate(λz)
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Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: apparent distribution volume(Vz/F)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacokinetic parameters: mean residence time(MRT)
Time frame: Part A; predose to 60 hours postdose, Part B; predose to 48 hours postdose each dose
Pharmacodynamic parameters: Visual Analogue Scale (VAS) reduction from baseline
Time frame: Part B only; Baseline to week 5