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Efficacy and Safety of Oral UT-15C Tablets to Treat Pulmonary Arterial Hypertension (FREEDOM-C2)

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ClinicalTrials.gov Identifier: NCT00887978
Recruitment Status : Completed
First Posted : April 24, 2009
Results First Posted : January 15, 2013
Last Update Posted : January 15, 2013
Information provided by (Responsible Party):
United Therapeutics

Brief Summary:

This study is an international, multi-center, randomized, double-blind, placebo-controlled study in subjects with PAH who are currently receiving approved therapy for their PAH (i.e., endothelin receptor antagonist and/or phosphodiesterase-5 inhibitor). Study visits will occur at 4 week intervals for 16 weeks with the key measure of efficacy being the 6-minute walk test. Study procedures include routine blood tests, medical history, physical exams, disease evaluation, and exercise tests.

Patients who complete all assessments for 16-weeks will also be eligible to enter an open-label, extension phase study (FREEDOM - EXT).

Condition or disease Intervention/treatment Phase
Pulmonary Hypertension Drug: UT-15C SR Drug: Placebo Phase 3

Study Type : Interventional  (Clinical Trial)
Actual Enrollment : 310 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Double (Participant, Investigator)
Primary Purpose: Treatment
Official Title: A 16-Week, International, Multicenter, Double-Blind, Randomized, Placebo-Controlled Study of the Efficacy and Safety of Oral UT-15C Sustained Release Tablets in Subjects With Pulmonary Arterial Hypertension
Study Start Date : June 2009
Primary Completion Date : July 2011
Study Completion Date : July 2011

Arm Intervention/treatment
Placebo Comparator: Placebo
Identical placebo tablets to UT-15C, doses were titrated in the same manner
Drug: Placebo
Experimental: UT-15C SR
Doses were initiated at 0.25 mg BID and increased by 0.25 mg BID every three days (as clinically indicated based on tolerability and symptoms of PAH), to a max dose of 16 mg BID.
Drug: UT-15C SR
treprostinil diolamine sustained release tablets
Other Name: treprostinil diolamine, treprostinil diethanolamine, UT-15C

Primary Outcome Measures :
  1. 6-minute Walk Distance (6MWD) [ Time Frame: Baseline and 16 weeks ]

    Placebo-corrected change in 6MWD from Baseline to Week 16, correlates with the current clinical standard for assessing patient functional status in the treatment of PAH and is considered an objective measure of patient functional status by the American Thoracic Society (ATS).

    The 6MWD was to be assessed between 3 and 6 hours after the morning dose of study drug and background therapy(ies).

Secondary Outcome Measures :
  1. Clinical Worsening Assessment [ Time Frame: Baseline and 16 Weeks ]

    Definition of clinical worsening included patients who met at least one of the following criteria during the 16 weeks of study:

    1. Death (all causes excluding accident)
    2. Transplantation
    3. Atrial septostomy
    4. Hospitalization as a result of right heart failure
    5. Greater than or equal to a 20% decrease in 6MWD from Baseline (or too ill to walk) AND addition of an inhaled prostacyclin analogue, ERA, or PDE-5i
    6. Initiation of parenteral prostacyclin therapy (i.e., epoprostenol, iloprost, or treprostinil) for the treatment of PAH

  2. Borg Dyspnea Score [ Time Frame: Baseline and 16 Weeks ]
    The Borg dyspnea score is a 10-point scale rating the maximum level of dyspnea experienced during the six-minute walk test (6MWT). The Borg dyspnea score was assessed immediately following the 6MWT. Scores ranged from 0 (for no shortness of breath) to 10 (for the greatest shortness of breath ever experienced).

  3. World Health Organization (WHO) Functional Class [ Time Frame: Baseline and 16 Weeks ]
    Class I: No limitation of physical activity. Class II: Slight limitation of physical activity. Class III: Marked limitation of physical activity. Class IV: Inability to carry out any physical activity without symptoms.

  4. Symptoms of PAH [ Time Frame: Baseline and 16 Weeks ]
    Symptoms of PAH including fatigue, dyspnea, edema, dizziness, syncope, chest pain and orthopnea were assessed by the physician at Baseline and Week 16. Severity grade values (i.e., 0, 1, 2 or 3) for each symptom were provided each subject. A severity of 0 indicated no symptoms, the maximum severity was 3, indicating severe symptoms. Mean change in symptom severity from Baseline to Week 16 is described.

  5. Dyspnea Fatigue Index [ Time Frame: Baseline and 16 Weeks ]
    The dyspnea-fatigue index was assessed at Baseline and Week 16. Each of the three components of the dyspnea-fatigue index were rated on a scale 0 to 4, with 0 being the worst condition and 4 being the best condition for each component. The dyspnea-fatigue index is computed by summing the three component scores.

  6. N-terminal proBNP (NT-proBNP) [ Time Frame: Baseline and 16 Weeks ]
    Serum N-terminal pro-BNP concentration was assessed at Baseline and Week 16.

  7. Quality of Life (QoL) Assessment: Cambridge Pulmonary Hypertension Outcome Review (CAMPHOR) [ Time Frame: Baseline and 16 Weeks ]
    Change in CAMPHOR Scores from Baseline to Week 16. The CAMPHOR is a health related quality of life instrument validated for pulmonary hypertension that assesses impairment (symptoms), disability (activities) and quality of life. The questionnaire is divided into three sections; Symptoms (Scores 0-25; high scores indicate more symptoms), Activity (Score 0-30; low score indicates good functioning)and Quality of Life (0-25; high scores indicate poor QoL). The sum of these scores equates to the Total score (0-80). In the CAMPHOR scores, lower scores indicate improvements.

Information from the National Library of Medicine

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Ages Eligible for Study:   18 Years to 75 Years   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • A subject is eligible for inclusion in this study if all of the following criteria apply:
  • Between 18 and 75 years of age, inclusive.
  • Body weight at least 40 kg (approximately 90 lbs.)
  • PAH that is either idiopathic/heritable; associated with appetite suppressant or toxin use; associated with collagen vascular disease; associated with repaired congenital shunts; associated with HIV.
  • Currently receiving an approved endothelin receptor antagonist and/or an approved phosphodiesterase-5 inhibitor for at least 90 days and on a stable dose for at least the last 30 days.
  • Baseline six-minute walk distance (6MWD) between 150-425 meters
  • Previous testing (e.g., right heart catheterization, echocardiography) consistent with the diagnosis of PAH.
  • Reliable and cooperative with protocol requirements.

Information from the National Library of Medicine

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): NCT00887978

  Hide Study Locations
United States, Alabama
University of Alabama-Birmingham
Birmingham, Alabama, United States, 35294-0006
United States, Arizona
Arizona Pulmonary Specialist, LTD
Phoenix, Arizona, United States, 85013
United States, California
University of California, San Francisco-Fresno
Fresno, California, United States, 93701
UCSD Medical Center
La Jolla, California, United States, 92037
West Los Angeles VA Healthcare Center
Los Angeles, California, United States, 90073
UC Davis Medical Center
Sacramento, California, United States, 95817
Harbor-UCLA Medical Center
Torrance, California, United States, 90502
United States, Colorado
University of Colorado Health Science Center
Aurora, Colorado, United States, 80045
United States, Florida
University of Florida-Jacksonville
Jacksonville, Florida, United States, 32209
Cleveland Clinic Florida
Weston, Florida, United States, 33331
United States, Georgia
Emory University School of Medicine
Atlanta, Georgia, United States, 30322
United States, Illinois
University of Chicago Hospitals
Chicago, Illinois, United States, 60637
United States, Iowa
University of Iowa Hospitals and Clinics
Iowa City, Iowa, United States, 52242
United States, Kansas
Kansas University Medical Center
Kansas City, Kansas, United States, 66160
United States, Kentucky
Kentuckiana Pulmonary Associates
Louisville, Kentucky, United States, 40202
United States, Maine
Maine Medical Center
Portland, Maine, United States, 04102-3175
United States, Massachusetts
Tufts Medical Center
Boston, Massachusetts, United States, 02111
Pulmonary Critical Care Medicine, Brigham and Women's Hospital
Boston, Massachusetts, United States, 02115
United States, Minnesota
Mayo Clinic
Rochester, Minnesota, United States, 55902
United States, Missouri
Washington University Hospital
St. Louis, Missouri, United States, 63110-1093
United States, Nebraska
University of Nebraska Medical Center
Omaha, Nebraska, United States, 68198-5300
United States, New Jersey
Newark Beth Israel Medical Center
Newark, New Jersey, United States, 07112
United States, New York
Winthrop University Hospital
Mineola, New York, United States, 11501
Columbia University Presbyterian Medical Center
New York, New York, United States, 10032
Mary M Parkes Center for Asthma, Allergy and Pulmonary Care
Rochester, New York, United States, 14623
United States, North Carolina
Duke University Medical Center
Durham, North Carolina, United States, 27710
United States, Ohio
Lindner Center
Cincinnati, Ohio, United States, 45219
University of Cincinnati
Cincinnati, Ohio, United States, 45267-0564
University Hospitals Case Medical Center
Cleveland, Ohio, United States, 44106
Ohio State University
Columbus, Ohio, United States, 43210
The University of Toledo
Toledo, Ohio, United States, 43614
United States, Oregon
Legacy Pulmonary Northwest
Portland, Oregon, United States, 97210
Portland, Oregon, United States, 97239
United States, Pennsylvania
University of Pennsylvania
Philadelphia, Pennsylvania, United States, 19104
Allegheny General Hospital
Pittsburgh, Pennsylvania, United States, 15212
University of Pittsburgh Medical Center
Pittsburgh, Pennsylvania, United States, 15213
United States, Texas
UT Southwestern
Dallas, Texas, United States, 75390
The University of Texas Health Science Center at Houston
Houston, Texas, United States, 77030
United States, Utah
Intermountain Medical Center
Murray, Utah, United States, 84157-7000
United States, Virginia
Inova Transplant Center
Falls Church, Virginia, United States, 22042
University Hospital Gasthuisberg
Leuven, Belgium, 3000
Canada, Alberta
University of Calgary
Calgary, Alberta, Canada, T1Y 6J4
University of Alberta Hospitals
Edmonton, Alberta, Canada, T6G 2B7
Canada, British Columbia
Vancouver Coastal Health Respiratory Clinic
Vancouver, British Columbia, Canada, V5Z 1M9
Canada, Ontario
London Health Sciences Center
London, Ontario, Canada, N6A 4G5
Toronto General Hospital
Toronto, Ontario, Canada, M5G 2N2
Hospital Claude Huriez
Lille, Cedex, France, 59037
Hospital Haut Leveque
Pessac, Cedex, France, 33604
Hospital Cavale Blanche
Brest, France, 29609
Universitaetsklinikum Dresden
Dresden, Germany, 01307
University Hospital Greifswald
Greifswald, Germany, 17475
Universitaetsklinikum Heidelberg
Heidelberg, Germany, 69120
Pulmonology Department Rambam Medical Center
Haifa, Israel, 31096
Lady Davis Carmel Medical Centre
Haifa, Israel, 34362
Pulmonary institute
Ramat Gan, Israel, 52621
Azienda Ospedaliera Universitaria
Naples, Italy
Amsterdam, Netherlands, 1007
Hospital de Santa Marta
Lisboa, Portugal, 1160-024
Hospital Clinic I Provincial de Barcelona
Barcelona, Spain, 08036
Hospital 12 de Octubre
Madrid, Spain, 28041
Lund University Hospital
Lund, Sweden, 221 85
United Kingdom
Royal Free Hospital NHS Trust
London, United Kingdom, NW3 2QG
Sponsors and Collaborators
United Therapeutics
Study Chair: Lewis Rubin, MD University of California, San Diego

Publications automatically indexed to this study by ClinicalTrials.gov Identifier (NCT Number):
Responsible Party: United Therapeutics
ClinicalTrials.gov Identifier: NCT00887978     History of Changes
Other Study ID Numbers: TDE-PH-308
First Posted: April 24, 2009    Key Record Dates
Results First Posted: January 15, 2013
Last Update Posted: January 15, 2013
Last Verified: December 2012

Additional relevant MeSH terms:
Hypertension, Pulmonary
Familial Primary Pulmonary Hypertension
Vascular Diseases
Cardiovascular Diseases
Lung Diseases
Respiratory Tract Diseases
Antihypertensive Agents