alexa BUILD-3: a randomized, controlled trial of bosentan in idiopathic pulmonary fibrosis.
Immunology

Immunology

Rheumatology: Current Research

Author(s): King TE Jr, Brown KK, Raghu G, du Bois RM, Lynch DA,

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Abstract RATIONALE: A previous trial of bosentan in idiopathic pulmonary fibrosis (IPF) showed a trend to delayed IPF worsening or death. Also, improvements in some measures of dyspnea and health-related quality of life were observed. OBJECTIVES: To demonstrate that bosentan delays IPF worsening or death. METHODS: Prospective, randomized (2:1), double-blind, placebo-controlled, event-driven, parallel-group, morbidity-mortality trial of bosentan in adults with IPF of less than 3 years' duration, confirmed by surgical lung biopsy, and without extensive honeycombing on high-resolution computed tomography. The primary endpoint was time to IPF worsening (a confirmed decrease from baseline in FVC ≥ 10\% and diffusing capacity of the lung for carbon monoxide ≥ 15\%, or acute exacerbation of IPF) or death up to End of Study. Effects of bosentan on health-related quality of life, dyspnea, and the safety and tolerability of bosentan were investigated. MEASUREMENTS AND MAIN RESULTS: Six hundred sixteen patients were randomized to bosentan (n=407) or placebo (=209). No significant difference between treatment groups was observed in the primary endpoint analysis (hazard ratio, 0.85; 95\% confidence interval, 0.66-1.10; P=0.2110). No treatment effects were observed on health-related quality of life or dyspnea. Some effects of bosentan treatment were observed in changes from baseline to 1 year in FVC and diffusing capacity of the lung for carbon monoxide. The safety profile for bosentan was similar to that observed in other trials. CONCLUSIONS: The primary objective in the Bosentan Use in Interstitial Lung Disease-3 trial was not met. Bosentan was well tolerated. Clinical trial registered with www.clinicaltrials.gov (NCT 00391443). This article was published in Am J Respir Crit Care Med and referenced in Rheumatology: Current Research

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