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Clinical Trials/NCT01236378
NCT01236378CompletedPhase 1

An Open-Label, Non-Randomized Study To Evaluate The Steady-State Pharmacokinetics Of Sirolimus Tablets In Chinese Patients With Stable Renal Allografts

Pfizer1 site in 1 country24 target enrollmentStarted: December 2010Last updated:
Conditions
Interventions
Drugs

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

Experimental

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)

Investigators

Sponsor
Pfizer
Sponsor Class
Industry
Responsible Party
Sponsor

Study Sites (1)

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