Conditions: Cystic Fibrosis
Keywords: Inhaled Nitric oxide Cystic Fibrosis
Allocation: RANDOMIZED | Intervention model: PARALLEL
Enrollment: 18
Healthy volunteers: no

Brief summary:
The primary objective of the trial is to assess the safety and tolerability of inhaled nitric oxide (NO) when administered by nasal cannula over a 44 hour period to clinically stable Cystic Fibrosis (CF) subjects. Toxicity is to be defined as a drop in oxygen saturations, a decline in forced expiratory volume in one second (FEV1), or an increase in methemoglobin.

Detailed description:
Cystic fibrosis (CF) is an autosomal recessive disorder caused by mutations in the gene encoding the cystic fibrosis transmembrane conductance regulator (CFTR) protein. A cycle of chronic, persistent infections with CF-related pathogens and an excessive inflammatory response progressively damages the airways and lung parenchyma, resulting in widespread bronchiectasis and ultimately, respiratory failure. Despite tremendous advances in understanding the CF gene and the CFTR protein, it is not known exactly how mutations in the gene and defects in CFTR lead to persistent airway infection and inflammation.

Inhaled nitric oxide (NO) has potential to be an effective treatment in CF lung disease. Inhaled NO has been studied in other airways diseases characterized by infection and /or inflammation such as COPD and idiopathic pulmonary fibrosis.

NO has been shown to activate CFTR and alternative chloride channels, thereby increasing chloride current in epithelial cells. Therefore, NO treatment may be beneficial in individuals with CF.

Arms:
arm 1: Subjects in the low dose cohort receive 20 part per million (ppm) of nitric oxide via nasal cannula over a 44 hour period. arm 2: Subjects in the high dose cohort receive 40 ppm of nitric oxide via nasal cannula over a 44 hour period. arm 3: 100% Nitrogen (placebo) will be administer at 20 ppm or 40 ppm via nasal cannula over a 44 hour period.

Interventions: intervention 1: Nitric Oxide for Inhalation intervention 2: Nitric Oxide for Inhalation intervention 3: Nitrogen
Intervention descriptions: intervention 1: Nitric oxide will be administered at 20 ppm via nasal cannula over a 44 hour period. intervention 2: Nitric oxide will be administered at 40 ppm via nasal cannula over a 44 hours period. intervention 3: 100% nitrogen (placebo) will be administered at 20 ppm or 40 ppm via nasal cannula over a 44 hour period.

Protocol document: