An Open-Label, Non-Randomized Study To Evaluate The Steady-State Pharmacokinetics Of Sirolimus Tablets In Chinese Patients With Stable Renal Allografts
Trial Snapshot
- Phase
- Phase 1
- Status
- Completed
- Sponsor
- Pfizer
- Enrollment
- 24
- Locations
- 1
- Primary Endpoint
- Maximum Observed Blood Concentration at Steady State (Cmax,ss)
Study Overview
Brief Summary
Sirolimus, 1 mg, white, triangular tablets (Rapamune®) was approved on 03 April 2007 in China for prophylaxis of organ rejection in renal transplantation. A pharmacokinetic (PK) study to be conducted in renal allograft recipients was requested by State Food and Drug Administration (SFDA) to provide further guidance for clinical use.
To minimize risk to patients, this study is designed to collect blood PK samples from renal allograft recipients who are currently under sirolimus (1 mg tablets) treatment with or without concomitant medication(s). PK samples will be collected from these patients to characterize the steady state PK of sirolimus during sirolimus maintenance therapy. This study will not involve any changes to the established treatment regimen for the patients who enroll in the study
Study Design
- Study Type
- Interventional
- Allocation
- Non Randomized
- Intervention Model
- Single Group
- Primary Purpose
- Treatment
- Masking
- None
Eligibility Criteria
- Ages
- 18 Years to — (Adult, Older Adult)
- Sex
- All
- Accepts Healthy Volunteers
- No
Inclusion Criteria
- •Male or female, above 18 years of age and Body Mass Index (BMI) of 18.0 to 25.0 kg/m2, inclusive;
- •Subjects must have received a primary or secondary renal allograft for at least 2 months prior to Screening;
- •Subjects must be currently taking Rapamune tablets for prophylaxis of renal rejection. The dosages of any medications must be stable for at least 2 weeks prior to screening and continue with no change until completion of the last PK sample collection.
Exclusion Criteria
- •Acute rejection or vascular rejection episode in the 4 weeks prior to Screening; or patients dependent on dialysis; or inadequate renal function (in the opinion of the investigator);
- •Recipients of multiple organ transplants (i.e., prior or concurrent transplantation of any organs other than renal transplant);
- •Current use of strong inducers or inhibitors of CYP3A4 within 2 weeks prior to collection of the first PK sample and until collection of the final PK sample;
- •Any clinically significant medical or psychiatric condition or laboratory abnormality, in the judgment of the investigator.
Arms & Interventions
sirolimus
Subjects must be taking sirolimus (1 mg tablet formulation) with or without concomitant medications, unless specifically excluded below, for prophylaxis of renal rejection.
Intervention: Sirolimus (Drug)
Outcomes
Primary Outcomes
Maximum Observed Blood Concentration at Steady State (Cmax,ss)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Time to Reach Maximum Observed Blood Concentration at Steady State (Tmax,ss)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Observed Blood Trough Concentration at Steady State (Ctrough,ss)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Average Blood Concentration at Steady State (Cave,ss)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Area Under the Curve From Time Zero to End of Dosing Interval (AUCtau) at Steady State
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Degree of Fluctuation (DF)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
DF, also known as peak to trough fluctuation (PTF) (calculated as \[Cmax minus Ctrough\] divided by Cave), is a unit-less ratio of the Cmax to Ctrough decrease expressed as a fraction of the average concentration during a dosing interval.
Apparent Oral Clearance (CL/F)
Time Frame: Predose (0 hour) and 0.5, 1, 1.5, 2, 2.5, 3, 4, 5, 6, 8, 12 and 24 hours post dose
Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed. Clearance was estimated from population pharmacokinetic (PK) modeling. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed.
Secondary Outcomes
- Number of Participants With Serum Creatinine Levels More Than (>) 1.3 Times the Upper Limit of Normal(From baseline up to Day 4)
- Number of Participants With Estimated Glomerular Filtration Rate (GFR) Less Than (<) 60 mL/Min/1.73 m^2(From baseline up to Day 4)
