Evaluate the Efficacy and Safety of Once Daily Administration of Atrasentan Tablets (Low and High) Compared to Placebo in Reducing Residual Albuminuria in Type 2 Diabetic Patients With Nephropathy Who Are Treated With the Maximum Tolerated Labeled Dose of a Renin Angiotensin System (RAS) Inhibitor (RADAR)

August 20, 2013 updated by: AbbVie (prior sponsor, Abbott)

RADAR: Reducing Residual Albuminuria in Subjects With Diabetes and Nephropathy With AtRasentan - A Phase 2b, Prospective, Randomized, Double-Blind, Placebo-Controlled Trial to Evaluate Safety and Efficacy

Prospective, Randomized, Double-Blind, Placebo-Controlled Multicenter Study. The objective of the study is to evaluate the efficacy and safety of once daily administration of atrasentan tablets (low dose and high dose) compared to placebo in reducing residual albuminuria in Type 2 diabetic patients with nephropathy who are treated with the maximum tolerated labeled dose of a Renin Angiotensin System (RAS) inhibitor. If the patient is already receiving a maximum tolerated labeled daily dose of RAS inhibitor and a diuretic, he/she will complete 4 weeks of the Run-in Period on a dose that has not been adjusted. If the patient is currently not receiving a maximum labeled daily dose of a RAS inhibitor then the dose will be titrated up to the maximum tolerated labeled dose over the course of 4 to 8 weeks during the Run-in Period. It is expected that subjects not receiving a diuretic will have a diuretic added or titrated during this period to maximize RAS inhibition. Following titration to the maximum tolerated labeled dose, the patient will complete an additional 4 weeks of Run-In Period on an unchanged doses of RAS inhibitor and diuretics, unless medically contraindicated. The randomization will be stratified based on country where subjects are enrolled into the study, and the Week -1 Urinary Albumin to Creatinine Ratio (UACR) levels (< or = 1000 mg/g [113 mg/mmol], or > 1000 mg/g [113 mg/mmol]). Within each stratum, subjects will be randomly assigned in a 1:2:2 ratio to one of the following blinded treatment groups: Group A - Placebo once daily (QD) Group B - low dose atrasentan QD Group C - high dose atrasentan QD After the 12 weeks of study drug treatment, subjects will be followed up to 30 days.

Study Overview

Status

Completed

Intervention / Treatment

Study Type

Interventional

Enrollment (Actual)

149

Phase

  • Phase 2

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

      • Kitchener, Canada, N2H 5Z8
        • Site Reference ID/Investigator# 67762
      • Sarnia, Canada, N7T 4X3
        • Site Reference ID/Investigator# 50526
      • Thornhill, Canada, L4J 8L7
        • Site Reference ID/Investigator# 50525
      • Caguas, Puerto Rico, 00725
        • Site Reference ID/Investigator# 47067
      • Manati, Puerto Rico, 00674
        • Site Reference ID/Investigator# 50522
      • Ponce, Puerto Rico, 00717-1322
        • Site Reference ID/Investigator# 46352
      • Ponce, Puerto Rico, 00717-2075
        • Site Reference ID/Investigator# 46351
      • Ponce, Puerto Rico, 00717
        • Site Reference ID/Investigator# 46133
      • Rio Piedras, Puerto Rico, 00935
        • Site Reference ID/Investigator# 46131
      • San Juan, Puerto Rico, 00918
        • Site Reference ID/Investigator# 46132
      • Santurce, Puerto Rico, 00909-2244
        • Site Reference ID/Investigator# 46230
      • Taichung, Taiwan, 40705
        • Site Reference ID/Investigator# 51567
      • Taichung City, Taiwan, 40447
        • Site Reference ID/Investigator# 51566
    • Alabama
      • Pell City, Alabama, United States, 35128
        • Site Reference ID/Investigator# 46345
    • Arizona
      • Tempe, Arizona, United States, 85284
        • Site Reference ID/Investigator# 46035
    • California
      • Azusa, California, United States, 91702
        • Site Reference ID/Investigator# 46016
      • Chula Vista, California, United States, 91910
        • Site Reference ID/Investigator# 45992
      • La Mesa, California, United States, 91942
        • Site Reference ID/Investigator# 46000
      • Lincoln, California, United States, 95648
        • Site Reference ID/Investigator# 46038
      • Long Beach, California, United States, 90806
        • Site Reference ID/Investigator# 45994
      • Los Angeles, California, United States, 90022
        • Site Reference ID/Investigator# 45998
      • Los Gatos, California, United States, 95032
        • Site Reference ID/Investigator# 47584
      • National City, California, United States, 91950
        • Site Reference ID/Investigator# 64465
      • Orange, California, United States, 92868
        • Site Reference ID/Investigator# 65862
      • Riverside, California, United States, 92505
        • Site Reference ID/Investigator# 46019
      • Salinas, California, United States, 93901
        • Site Reference ID/Investigator# 46110
      • Yuba City, California, United States, 95991
        • Site Reference ID/Investigator# 46017
    • Colorado
      • Westminster, Colorado, United States, 80031
        • Site Reference ID/Investigator# 46662
    • Florida
      • Coral Gables, Florida, United States, 33134
        • Site Reference ID/Investigator# 46033
      • Hialeah, Florida, United States, 33012
        • Site Reference ID/Investigator# 45989
      • Lauderdale Lakes, Florida, United States, 33313
        • Site Reference ID/Investigator# 46667
      • Miami, Florida, United States, 33135
        • Site Reference ID/Investigator# 46123
      • Ocala, Florida, United States, 34471
        • Site Reference ID/Investigator# 46115
      • Pembroke Pines, Florida, United States, 33027
        • Site Reference ID/Investigator# 46664
      • Pembroke Pines, Florida, United States, 33028
        • Site Reference ID/Investigator# 46031
      • Pembroke Pines, Florida, United States, 33028
        • Site Reference ID/Investigator# 46040
      • Port Charlotte, Florida, United States, 33952
        • Site Reference ID/Investigator# 46122
      • West Palm Beach, Florida, United States, 33401
        • Site Reference ID/Investigator# 46015
    • Georgia
      • Jonesboro, Georgia, United States, 30236
        • Site Reference ID/Investigator# 50482
    • Idaho
      • Meridian, Idaho, United States, 83642
        • Site Reference ID/Investigator# 46034
    • Illinois
      • Chicago, Illinois, United States, 60616
        • Site Reference ID/Investigator# 46666
      • Evergreen Park, Illinois, United States, 60805
        • Site Reference ID/Investigator# 45996
      • Gurnee, Illinois, United States, 60031
        • Site Reference ID/Investigator# 46002
    • Louisiana
      • Shreveport, Louisiana, United States, 71101
        • Site Reference ID/Investigator# 46111
    • Maryland
      • Oxon Hill, Maryland, United States, 20745
        • Site Reference ID/Investigator# 46030
      • Rockville, Maryland, United States, 20852
        • Site Reference ID/Investigator# 45991
    • Michigan
      • Novi, Michigan, United States, 48374
        • Site Reference ID/Investigator# 46025
    • Minnesota
      • Brooklyn Center, Minnesota, United States, 55430
        • Site Reference ID/Investigator# 46023
    • Missouri
      • Farmington, Missouri, United States, 63640
        • Site Reference ID/Investigator# 46062
    • Nebraska
      • Omaha, Nebraska, United States, 68131-3403
        • Site Reference ID/Investigator# 48942
      • Omaha, Nebraska, United States, 68131
        • Site Reference ID/Investigator# 46349
    • Nevada
      • Las Vegas, Nevada, United States, 89106
        • Site Reference ID/Investigator# 46116
    • New York
      • Albany, New York, United States, 12206
        • Site Reference ID/Investigator# 50483
      • New Hyde Park, New York, United States, 11042
        • Site Reference ID/Investigator# 68328
    • North Carolina
      • Asheville, North Carolina, United States, 28801
        • Site Reference ID/Investigator# 65863
      • Greensboro, North Carolina, United States, 27408
        • Site Reference ID/Investigator# 50529
      • Greenville, North Carolina, United States, 27834
        • Site Reference ID/Investigator# 46129
      • Morehead City, North Carolina, United States, 28557
        • Site Reference ID/Investigator# 46022
    • Pennsylvania
      • Doylestown, Pennsylvania, United States, 18901
        • Site Reference ID/Investigator# 46224
    • South Carolina
      • Orangeburg, South Carolina, United States, 29118
        • Site Reference ID/Investigator# 46028
      • Orangeburg, South Carolina, United States, 29118
        • Site Reference ID/Investigator# 46702
    • Texas
      • Greenville, Texas, United States, 75402
        • Site Reference ID/Investigator# 46024
      • Houston, Texas, United States, 77004
        • Site Reference ID/Investigator# 46228
      • Houston, Texas, United States, 77004
        • Site Reference ID/Investigator# 47068
      • Houston, Texas, United States, 77054
        • Site Reference ID/Investigator# 64464
      • Mission, Texas, United States, 78572
        • Site Reference ID/Investigator# 64483
      • San Antonio, Texas, United States, 78215
        • Site Reference ID/Investigator# 46348
      • San Antonio, Texas, United States, 78229-4801
        • Site Reference ID/Investigator# 46063
      • San Antonio, Texas, United States, 78229
        • Site Reference ID/Investigator# 68486
    • Vermont
      • Bennington, Vermont, United States, 05201
        • Site Reference ID/Investigator# 46669
    • Virginia
      • Alexandria, Virginia, United States, 22304
        • Site Reference ID/Investigator# 46026
      • Fairfax, Virginia, United States, 22030
        • Site Reference ID/Investigator# 46027

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Patient is > or = 18 years old.
  • Patient has Type 2 diabetes and has been treated with at least one anti hyperglycemic medication within the 12 months prior to the Screening Period.
  • Patient is currently receiving an angiotensin converting enzyme inhibitor (ACEi) or Angiotensin II receptor blocker (ARB) (Renin Angiotensin System (RAS) inhibitor).
  • For entry in the Run-in Period the patient must satisfy the following criteria based on the Screening laboratory values:

    • Estimated glomerular filtration rate (eGFR) ≥ 30 and ≤ 75 mL/min/1.73m2 by Epidemiology Collaboration (EPI) formula
    • Urinary Albumin to Creatinine Ratio (UACR) > or = 300 and < or = 3500 mg/g as determined by the geometric mean of the two morning void urine specimens obtained at the Screening visit (UACR > or = 34 mg/mmol and < or = 396 mg/mmol)
    • Serum albumin > or = 3.0 g/dL (30 g/L) - B-type Natriuretic Peptide (BNP) < or = 200 pg/mL (57.8 pmol/L) * Negative serum pregnancy test for female patients
    • Systolic Blood Pressure (SBP) > or = 110 mmHg and < or = 180 mmHg
    • Glucosylated hemoglobin A1c (HbA1c) < or = 12%
  • For entry in the Treatment Period the patient must satisfy the following criteria based on the last visit of the Run-in Period laboratory values:

    • Renin Angiotensin System (RAS) inhibitor at maximum tolerated labeled dose for the previous 4 weeks with no adjustments of dose
    • Diuretic at any dose unless medically contraindicated (with the exception of loop diuretics > or = 120 mg QD of furosemide or > or = 3.0 mg QD of bumetanide or > or = 150 mg QD of ethacrynic acid or > or = 60 mg QD of torasemide)
    • Urinary Albumin to Creatinine Ratio (UACR) > or = 200 and < or = 3500 mg/g as determined by the median of the three morning void urine specimens obtained prior to the Week -1 visit (UACR > or = 23 mg/mmol and < or = 396 mg/mmol)
    • Systolic blood pressure (SBP) > or = 110 mmHg and < or = 160 mmHg
    • Serum Potassium < or = 5.5 mEq/L (5.5 mmol/L)
    • Negative serum pregnancy test for female patients

Exclusion Criteria:

  • Patient has a history of moderate or severe edema, facial edema unrelated to trauma, or a history of myxedema in the prior 6 months to Screening.
  • Patient is receiving loop diuretics > or = 120 mg QD of furosemide or > or = 3.0 mg QD of bumetanide or > or = 150 mg QD of ethacrynic acid or > or = 60 mg QD of torasemide.
  • Patient has a history of pulmonary edema.
  • Patient has a history of pulmonary hypertension, or any lung diseases requiring oxygen therapy (i.e., chronic obstructive pulmonary disease, emphysema, pulmonary fibrosis).
  • Patient has a history of orthostatic hypotension within the past 6 months as defined by the presence of a supine-to-standing blood pressure decrease > or = 20 mmHg systolic or > or = 10 mmHg diastolic within 3 minutes of standing.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Placebo Comparator: Group A - Placebo QD
Subjects will take two tablets daily of placebo QD for 12 weeks during the treatment period.
Active Comparator: Group B - Low dose Atrasentan QD
Subjects will take two tablets daily of either low dose Atrasentan QD or high dose Atrasentan QD for 12 weeks during the treatment period.
Other Names:
  • ABT-627
Active Comparator: Group C - High dose Atrasentan QD
Subjects will take two tablets daily of either low dose Atrasentan QD or high dose Atrasentan QD for 12 weeks during the treatment period.
Other Names:
  • ABT-627

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Change from baseline to Week 12 in Urinary Albumin to Creatinine Ratio (UACR)
Time Frame: Every two weeks for 12 weeks
Every two weeks for 12 weeks

Secondary Outcome Measures

Outcome Measure
Time Frame
Differences in change from baseline to each post baseline measure for estimated glomerular filtration rate (eGFR)
Time Frame: Every two weeks for 12 weeks
Every two weeks for 12 weeks
Differences in change from baseline to each post baseline measure for EQ-5D Index Score
Time Frame: Once a month for 3 months
Once a month for 3 months
Differences in change from baseline to each post baseline measure for each of the Kidney Disease Quality of Life (KDQOL) Kidney Disease Targeted Scales
Time Frame: Once a month for 3 months
Once a month for 3 months

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Investigators

  • Study Director: Blai Coll, MD, AbbVie

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start

April 1, 2011

Primary Completion (Actual)

August 1, 2012

Study Completion (Actual)

August 1, 2012

Study Registration Dates

First Submitted

April 19, 2011

First Submitted That Met QC Criteria

May 18, 2011

First Posted (Estimate)

May 20, 2011

Study Record Updates

Last Update Posted (Estimate)

August 28, 2013

Last Update Submitted That Met QC Criteria

August 20, 2013

Last Verified

August 1, 2013

More Information

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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