Expired Study
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New Haven, Connecticut 06520


Endothelin-1 (ET-1) is expressed in a variety of pulmonary pathological conditions including pulmonary vascular disease and pulmonary fibrosis. Bosentan (an oral dual ET-1 receptor antagonist) could delay the progression of idiopathic pulmonary fibrosis (IPF), a condition for which no established treatment is available. The present trial investigates a possible use of bosentan, which is currently approved for the treatment of symptoms of pulmonary arterial hypertension (PAH) WHO class III and IV, to a new category of patients suffering from IPF. It was decided to offer Open Label treatment (bosentan) for patients willing to continue in the BUILD 1 study.


Inclusion Criteria: 1. Male or female patients over 18 years of age. - Women must be either postmenopausal (i.e., amenorrhea for at least 1 year), or surgically or naturally sterile. - Women of childbearing potential must have a negative pre-treatment pregnancy test and use a reliable method of contraception during study treatment and for at least 3 months after study treatment termination. 2. IPF proven diagnosis < 3 years documented according to ATS/ERS international multidisciplinary consensus, with or without surgical (thoracoscopic or open) chest lung biopsy 3. Duration of illness ≥ 3 months. 4. Six-minute walk test distance (limited by dyspnea) ≥ 150 meters and < 500 meters 5. Patients who have signed the informed consent form prior to initiation of any study procedure. Exclusion Criteria: 1. Interstitial lung disease due to conditions other than IPF, including but not limited to radiation, sarcoidosis, hypersensitivity pneumonitis, bronchiolitis obliterans with organizing pneumonia, and cancer. 2. History of clinically significant environmental exposure known to cause pulmonary fibrosis (drugs, asbestos, beryllium, radiation, domestic birds, etc.). 3. Severe concomitant illness limiting life expectancy (< 1 year). 4. FVC ≥ 90% predicted. 5. Severe restrictive lung disease: FVC < 50% predicted or FVC < 1.2 l, or DLco < 30% predicted or residual volume ≥ 120% predicted. 6. Severe obstructive lung disease: FEV1/FVC< 0.65. 7. Documented improvement of patient's condition within 12 months prior to randomization with or without IPF-specific therapy (e.g., corticosteroids, immunosuppressive, cytotoxic or antifibrotic drugs, TNFa blocker, interferon g). 8. Recent pulmonary or upper respiratory track infection (within 4 weeks of randomization). 9. PaO2 < 55 mm Hg (sea level) or 50 mm Hg (altitude) at rest on room air. 10. Echocardiographic evidence of severe pulmonary hypertension (PH): systolic pulmonary pressure ≥ 50 mm Hg or tricuspid regurgitation velocity ≥ 3.2 m/sec (unless severe PH is invalidated by a right heart catheterization). If the pulmonary pressure is not quantifiable, presence of significant right ventricular enlargement or hypertrophy or right ventricular dysfunction. 11. Severe chronic heart failure, e.g., NYHA class III or IV and/or left ventricular ejection fraction < 25%. 12. Acute or chronic impairment (other than dyspnea) limiting the ability to comply with study requirements, e.g., the 6MWT or the PFTs. (e.g., angina pectoris, intermittent claudicating, chronic arthritis). 13. Baseline values of liver transaminases, i.e., aspartate aminotransferases (AST) and/or alanine aminotransferases (ALT) > 3 times the upper limit of normal ranges. 14. Moderate to severe hepatic impairment, i.e., Child-Pugh Class B or C. 15. Serum creatinine ≥ 2.5 mg/dl (221 mmol/l) or dialysis. 16. Hemoglobin concentration < 75% the lower limit of normal ranges. 17. Systolic blood pressure < 85 mm Hg. 18. Pregnancy or breast-feeding. 19. Current drug or alcohol dependence. 20. Smoker (≥ 5 cigarettes per day) or former smoker (≥ 5 cigarettes per day) having stopped less than 6 months prior to randomization. 21. Recently started (< 8 weeks from Screening visit) or planned cardio-pulmonary rehabilitation program based on exercise. 22. Treatment with oral corticosteroids (> 15 mg/day prednisone or equivalent), immunosuppressive, cytotoxic or antifibrotic drugs such as TNF alpha blocker, or interferon gamma within 4 weeks of randomization.within 4 weeks of randomization. 23. Treatment with glibenclamide (glyburide), cyclosporine A or tacrolimus within 1 weeks of randomization. 24. Treatment with an endothelin receptor antagonist within 3 months of randomization. 25. Treatment within 3 months of randomization or planned treatment with another investigational drug. 26. Known hypersensitivity to bosentan or any of the excipients.

Study is Available At:

Original ID:




Secondary ID:


Study Acronym:


Brief Title:

Efficacy and Safety of Oral Bosentan in Patients With Idiopathic Pulmonary Fibrosis

Official Title:

A Double-blind, Randomized, Placebo-controlled, Multicenter Study to Assess the Efficacy, Safety, and Tolerability of Bosentan in Patients With Idiopathic Pulmonary Fibrosis, Open Label Extension

Overall Status:


Study Phase:

Phase 2/Phase 3



Minimum Age:

18 Years

Maximum Age:


Quick Facts

Healthy Volunteers
Oversight Has DMC
Study Is FDA Regulated
Study Is Section 801
Has Expanded Access

Study Source:


Oversight Authority:

United States: Food and Drug Administration

Reasons Why Stopped:

Study Type:


Study Design:

Allocation: Randomized, Endpoint Classification:

Number of Arms:


Number of Groups:


Total Enrollment:


Enrollment Type:


Study Dates

Start Date:August 2003
Completion Date:May 2010
Completion Type:Actual
Primary Completion Date:September 2005
Primary Completion Type:Actual
Verification Date:February 2012
Last Changed Date:February 22, 2012
First Received Date:October 23, 2003

Study Outcomes

Outcome Type:Secondary Outcome
Measure:Death or treatment failure
Time Frame:Up to End-of-Period 1
Safety Issues:False
Outcome Type:Primary Outcome
Measure:Change in 6-minute walk distance
Time Frame:Baseline to End-of-Period 1
Safety Issues:False

Study Interventions

Intervention Type:Drug
Description:Initial dose: 62.5 mg b.i.d. for 4 weeks. Target dose: - body weight > 40 kg (90 lb): 125 mg b.i.d., (if the initial dose is well tolerated). body weight < 40 kg (90 lb): 62.5 mg b.i.d.
Arm Name:1
Other Name:Tracleer
Intervention Type:Drug
Description:Initial dose: 62.5 mg b.i.d. for 4 weeks. Target dose: - body weight > 40 kg (90 lb): 125 mg b.i.d., (if the initial dose is well tolerated). body weight < 40 kg (90 lb): 62.5 mg b.i.d.
Arm Name:2

Study Arms

Study Arm Type:Experimental
Arm Name:1
Description:Initial dose: 62.5 mg b.i.d. for 4 weeks. Target dose: - body weight > 40 kg (90 lb): 125 mg b.i.d., (if the initial dose is well tolerated). body weight < 40 kg (90 lb): 62.5 mg b.i.d.
Study Arm Type:Placebo Comparator
Arm Name:2
Description:Initial dose: 62.5 mg b.i.d. for 4 weeks. Target dose: - body weight > 40 kg (90 lb): 125 mg b.i.d., (if the initial dose is well tolerated). body weight < 40 kg (90 lb): 62.5 mg b.i.d.

Study Agencies

Agency Class:Industry
Agency Type:Lead Sponsor
Agency Name:Actelion

Sample and Retention Information

There are no available Sample and Retention Information

Study References

There are no available Study References

Data Source: ClinicalTrials.gov

Date Processed: January 21, 2020

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