Study To Evaluate Pharmacokinetics Of Sirolimus In Stable Renal Transplant Recipients
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|ClinicalTrials.gov Identifier: NCT01236378|
Recruitment Status : Completed
First Posted : November 7, 2010
Results First Posted : February 29, 2012
Last Update Posted : March 1, 2012
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
|Condition or disease||Intervention/treatment||Phase|
|Transplant Rejection Renal Transplantation||Drug: Sirolimus||Phase 1|
|Study Type :||Interventional (Clinical Trial)|
|Actual Enrollment :||24 participants|
|Intervention Model:||Single Group Assignment|
|Masking:||None (Open Label)|
|Official Title:||An Open-Label, Non-Randomized Study To Evaluate The Steady-State Pharmacokinetics Of Sirolimus Tablets In Chinese Patients With Stable Renal Allografts|
|Study Start Date :||December 2010|
|Actual Primary Completion Date :||April 2011|
|Actual Study Completion Date :||April 2011|
Subjects must be taking sirolimus (1 mg tablet formulation) with or without concomitant medications, unless specifically excluded below, for prophylaxis of renal rejection.
Sirolimus, 1 mg, white, triangular tablets, daily dose, dosages of any of these 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.
Other Name: Rapamune
- 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.
- Number of Participants With Serum Creatinine Levels More Than (>) 1.3 Times the Upper Limit of Normal [ Time Frame: From baseline up to Day 4 ]Serum creatinine, an indicator of kidney function, formed from the metabolism of creatine, commonly found in blood, urine, and muscle tissue, is removed from blood by kidneys and excreted in urine. Increased creatinine in blood indicates decreased kidney function. Creatinine levels are age, gender and race dependent as they are related to an individual's muscle mass. Renal transplant recipients may have elevated serum creatinine. For this study an abnormal serum creatinine level is defined as 1.3 times the upper limit of normal (ULN) for the laboratory where the determination was performed.
- Number of Participants With Estimated Glomerular Filtration Rate (GFR) Less Than (<) 60 mL/Min/1.73 m^2 [ Time Frame: From baseline up to Day 4 ]GFR, an index of kidney function, describes flow rate of filtered fluid through the kidney. GFR can be measured directly or estimated using established formulas. GFR was calculated using the Simplified Modification of Diet in Renal Dysfunction (MDRD) GFR equation. Normal GFR is >90 mL/min/1.73 m^2; children and older people usually have lower GFR. Often, kidney transplant recipients do not have normal GFRs. Lower values indicate poor kidney function. GFR <15 mL/min/1.73 m^2 is consistent with kidney failure. For this posting, the number of subjects with a GFR <60 mL/min/1.73 m^2 is listed.
To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT01236378
|Pfizer Investigational Site|
|Chongqing, China, 400038|
|Pfizer Investigational Site|
|Shanghai, China, 200127|
|Study Director:||Pfizer CT.gov Call Center||Pfizer|