Short-term Renal Hemodynamic Effects of Tolvaptan in Subjects With Autosomal Dominant Polycystic Kidney Disease (ADPKD)

Autosomal Dominant Polycystic Kidney Disease Clinical Trial

Official title: A Phase 2a, Single-center Study Investigating the Short-term Renal Hemodynamic Effects, Safety and Pharmacokinetics/ Pharmacodynamics of Oral Tolvaptan in Subjects With Autosomal Dominant Polycystic Kidney Disease at Various Stages of Renal Function

Status Completed

Clinical Trial Summary

The purpose of the trial was to determine the short-term effects of tolvaptan in patients with autosomal dominant polycystic kidney disease (ADPKD) at various levels of renal function.

Clinical Trial Description

Renal function was assessed during screening with the estimated glomerular filtration rate (eGFR), which was calculated with the 4-variable modification of diet in renal disease (MDRD) equation using a minimum of 2 creatinine measurements. The eGFR values were used to categorize participants into 1 of 3 mutually exclusive strata (> 60 [Group A], 30 to 60 [Group B], and < 30 [Group C] mL/min/1.73 m^2). Each of the 3 groups received the same tolvaptan treatment.

During the 3-week treatment period, participants were up-titrated on a weekly basis from 45/15 mg to 60/30 mg to 90/30 mg (AM and PM [8 hours later] split-dose) to the maximally tolerated dose. The 3-week treatment period was followed by a 3-week post-treatment period during which no study medication was administered.

The effects of the highest tolerated split-dose of tolvaptan on renal hemodynamics and pharmacokinetic and pharmacodynamic parameters were assessed throughout the 6 weeks of the study. The reversibility of changes during the post-treatment period after withdrawal of the drug was determined and the acute transitory effects on kidney volume were also explored. ;

Related Conditions & MeSH terms

• Autosomal Dominant Polycystic Kidney Disease
• Kidney Diseases
• Polycystic Kidney Diseases
• Polycystic Kidney, Autosomal Dominant

• NCT number: NCT01336972
• Study type: Interventional
• Source: Otsuka Pharmaceutical Development & Commercialization, Inc.
• Status: Completed
• Phase: Phase 2
• Start date: October 2010
• Completion date: November 2011