Safety and Efficacy Study of Aztreonam for Inhalation Solution (AZLI) in Patients With Cystic Fibrosis, Mild Lung Disease, and P. Aeruginosa
Safety and Efficacy Study of Aztreonam for Inhalation Solution (AZLI) in Patients With Cystic Fibrosis, Mild Lung Disease, and P. Aeruginosa
The purpose of this study was to evaluate the safety and efficacy of a 28-day course of
 aztreonam for inhalation solution (AZLI) in patients with cystic fibrosis (CF), mild lung
 disease (forced expiratory volume in 1 second [FEV1] >75% predicted, and Pseudomonas
 aeruginosa (PA) infection.
CF patients often have lung infections that occur repeatedly or worsen over time. The lung
 infections are often caused by a bacteria called Pseudomonas aeruginosa (PA). Treatment with
 antibiotics can stop or slow down the growth of the bacteria. The antibiotics may be given by
 mouth, intravenously (IV), or by inhalation as a mist. The purpose of this study was to
 evaluate the safety and efficacy of AZLI, an investigational formulation of the antibiotic
 aztreonam and administered three times a day using the PARI eFlow® electronic nebulizer, in
 CF patients with PA and mild lung disease.

 In this study, participant eligibility was assessed at a screening visit that occurred up to
 14 days prior to the baseline visit (Day 0). Those participants who met eligibility criteria
 at Day 0 were randomized and began a 28-day course of blinded study treatment (AZLI or
 placebo TID). Participants returned for clinic visits at Day 14, an end of treatment visit at
 Day 28, and a follow up visit 14 days after the last dose of the trial drug (Day 42).
Inclusion Criteria:

 -  Participants ≥ 6 years of age

 -  Documentation of CF diagnosis as evidenced by one or more clinical features consistent
 with the CF phenotype and one or more of the following criteria:

 -  Sweat chloride ≥ 60 mEq/L by quantitative pilocarpine iontophoresis test

 -  Two well characterized mutations in the cystic fibrosis transmembrane conductance
 regulator (CFTR) gene

 -  Abnormal nasal potential difference

 -  PA present in expectorated sputum or throat swab culture at Visit 1 OR documented PA
 in 2 expectorated sputum or throat swab cultures within the 12 months prior to Visit 1
 (one of the previous PA positive cultures must have been no more than 3 months prior
 to Visit 1)

 -  FEV1 > 75% predicted at Visit 1

 -  Participants must have exhibited two or more of the following chronic and/or
 intermittent CF symptoms, for a minimum of 28 days prior to randomization and with no
 worsening of symptoms within 7 days prior to randomization:

 -  Chest congestion

 -  Daily cough

 -  Productive cough

 -  Wheezing

 -  Trouble breathing

 -  Nocturnal wakening due to coughing

 -  Participants (and parent/guardian as required) had to be able to provide written
 informed consent/assent prior to any study related procedures

 -  Females of childbearing potential had to have a negative urine pregnancy test at Visit
 1

 -  Ability to perform reproducible pulmonary function tests

 -  In the opinion of the Investigator, the participant did not require immediate
 antipseudomonal antibiotic intervention to treat an impending exacerbation, and the
 participant's condition was stable enough to enroll in the study

 Exclusion Criteria:

 -  Administration of any investigational drug or device within 28 days prior to Visit 1
 or within 6 half-lives of the investigational drug (whichever was longer)

 -  Administration of any IV, oral, or inhaled antipseudomonal antibiotic within 28 days
 prior to Visit 1

 -  Known local or systemic hypersensitivity to monobactam antibiotics

 -  Inability to tolerate short-acting bronchodilator (BD) use at least TID

 -  Changes in or initiation of chronic azithromycin treatment within 28 days prior to
 Visit 1

 -  Changes in or initiation of chronic hypertonic saline treatment within 28 days prior
 to Visit 1

 -  Changes in or initiation of dornase alfa within 28 days prior to Visit 1

 -  Changes in antimicrobial, BD, or corticosteroid medications within 7 days prior to
 Visit 1

 -  Changes in physiotherapy technique or schedule within 7 days prior to Visit 1

 -  History of lung transplantation

 -  History of participation (enrollment) in any prior clinical studies with AZLI

 -  A chest radiograph at Visit 1 (or within the previous 180 days of Visit 1), with
 abnormalities indicating a significant acute finding (e.g., lobar infiltrate and
 atelectasis, pneumothorax, or pleural effusion); a chest radiograph obtained and
 interpreted between Visits 1 and 2 was also acceptable for determining eligibility

 -  Positive urine pregnancy test at Visit 1; all women of childbearing potential were to
 be tested

 -  Females of childbearing potential who were lactating or were not (in the opinion of
 the investigator) practicing an acceptable method of birth control; female
 participants who utilized hormonal contraceptives as their birth control method must
 have used the same method for at least 3 months before study dosing

 -  Participant was being assessed at Visit 1 by the investigator for an acute change in
 respiratory symptoms

 -  Any serious or active medical or psychiatric illness, which in the opinion of the
 investigator, would have interfered with participant treatment, assessment, or
 compliance with the protocol