Evaluation of the Effect of PUR118 on Ozone Induced Airway Inflammation in Healthy Normal Volunteers

Single-blind Evaluation of the Effect of PUR118 on Ozone Induced Airway Inflammation in Healthy Normal Volunteers

This trial in healthy subjects will assess PUR118's effect on attenuating ozone induced airway inflammation. This trial will establish the tolerability of PUR118 in healthy normal volunteers.

Inclusion Criteria:

• Healthy males or non pregnant, non lactating healthy females age 18-50 years;
• Must be able to produce acceptable sputum sample by induction;
• Must respond to ozone inhalation with a > 10% increase in the absolute percentage of sputum neutrophils and the total neutrophils (neutrophils/gram sputum) must increase by at least 50% from the sputum neutrophil count at screening;
• Volunteer is a non-smoker or ex-smoker of at least 12 months' duration prior to screening with a history of less than 1 pack per year.

Exclusion Criteria:

• Volunteers receiving chronic medication other than oral contraceptives;
• Screening forced expiratory volume FEV1 is < 80% of the predicted value for their age, gender, height and race and/or their FEV1/FVC ration is below 70%;
• Volunteers with significant occupational exposure to respiratory irritants or toxins
• Upper respiratory tract infection within 30 days of the first study day, or lower respiratory tract infection within the last 3 months;
• Volunteers taking any medication that may affect the respiratory tract within 30 days of the first study day;
• Volunteers with a history of asthma