A Scintigraphy Study of PT010 in COPD Patients

This will be a single-dose study to assess the pulmonary deposition of Radiolabelled BGF MDI following administration in male and female patients with moderate to severe/very severe COPD. Serious Adverse Events (SAEs) will be recorded from the time of signing of informed consent form to Post-study Follow-up phone call. Non-serious Adverse Events (AEs) will be collected from the first dose on Day 1 to Post-study Follow-up phone call. Study drug will be administered by inhalation.

The study will comprise of a Screening Visit, followed by a single Treatment Period and a Post-study Follow-up phone call. The Treatment Period will be from the afternoon before (Day 1) until 4 hours (h) post dose (Day 1). Patients will arrive at the Clinical Unit on Day 1. Patients will withhold their regular COPD medication in the morning of Day 1 and instead be given short-acting Ventolin Hydrofluoroalkane (HFA) and Atrovent HFA which may be used up to (but not within) 6 h prior to dosing. Investigational Product (IP) will be administered on the afternoon of Day 1 fasted (after a fast of at least 2 h) and patients will be discharged 4 h post dose (Day 1), provided there are no ongoing safety concerns. During the treatment period, patients will also undergo a Krypton-81m (81mKr) gas ventilation imaging scan and a Cobalt-57 (57Co) transmission scan. SAEs will be evaluated from the time of signing the informed consent form and up to the Post-study Follow-up phone call, non-serious AEs will be evaluated from Day 1 following IP dose and up to the Post-study Follow-up phone call. Approximately 20 patients (10 per cohort) will be enrolled for at least 16 to complete the study:

• Approximately 10 patients with moderate COPD (Forced Expiratory Volume in 1 Second (FEV1) ≥50-<80% of predicted normal), for at least 8 completed patients.
• Approximately 10 patients with severe/very severe COPD (FEV1 <50% of predicted normal), for at least 8 completed patients.

At the time of dosing, patients will be required to perform 2 inhalations (after priming) under the supervision of an Investigator. Immediately following each inhalation, patients will perform a maximal breath-hold, up to 10 s, prior to exhaling into an exhalation filter. Once the second breath hold and exhalation has been performed, patients will rinse their mouth with water and expel the washings for collection. Patients will then swallow bread and water.

Thereafter, posterior and anterior views of the lungs and stomach, and a lateral head and neck view will be recorded using a gamma camera. All images will be of a maximum of 200 s in duration. Images will also be acquired of the exhalation filter and collected mouth washings. Mass balance calculations will be undertaken to determine the fraction of the emitted dose delivered to the lungs of the patients. The distribution pattern of radiolabel within the lungs will be described in terms of a ratio of radioactive counts in different lung regions, after accounting for differences in regional lung volumes.

Main Inclusion Criteria:

• Males and females at least 40 years of age and no older than 80 years.
• Patients with diagnosis of COPD as defined by the American Thoracic Society (ATS)/European Respiratory Society (ERS) [1].

• Post bronchodilator (BD) FEV1 / Forced Vital Capacity (FVC) ratio must be < 0.70.
• Post BD FEV1 must be < 80% predicted.
• All patients must be receiving 1 or more inhaled maintenance therapies, including at least 1 long-acting bronchodilator, for the management of their COPD for at least 4 weeks prior to the Screening Visit.
• Current or former smokers with a history of at least 10 pack-years of cigarette smoking. [Number of pack-years = (number of cigarettes per day/20) x number of years smoked (e.g. 20 cigarettes per day for 10 years or 10 cigarettes per day for 20 years represent 10 pack-years)].

Main Exclusion Criteria:

• Any significant disease or disorder (e.g. including but not limited to gastrointestinal, hepatic, renal/urinary tract, haematological, neurological, musculoskeletal, endocrine, metabolic, eye, psychiatric which, in the opinion of the Investigator, may either put the patient at risk because of participation in the study, or influence the results of the study.
• Respiratory:

Current diagnosis of asthma, in the opinion of the Investigator. COPD due to α1-Antitrypsin Deficiency. Sleep apnoea that, in the opinion of the Investigator, is uncontrolled. Other Respiratory Disorders: known active tuberculosis, lung cancer, cystic fibrosis, significant bronchiectasis (high resolution computerised tomography [CT] evidence of bronchiectasis that causes repeated acute exacerbations), immune deficiency disorders, severe neurological disorders affecting control of the upper airway, sarcoidosis, idiopathic interstitial pulmonary fibrosis, primary pulmonary hypertension, or pulmonary thromboembolic disease. Note: allergic rhinitis is not exclusionary.

A moderate or severe exacerbation of COPD ending within 6 weeks prior to dosing (Day 1). The end date of an exacerbation is the last day of treatment with systemic corticosteroids or antibiotics.

Prior pulmonary resection or Lung Volume Reduction Surgery [i.e., lobectomy, bronchoscopic lung volume reduction (endobronchial blockers, airway bypass, endobronchial valves, thermal vapor ablation, biological sealants, and airway implants)].

• Cardiovascular Patients with significant or unstable ischemic heart disease, arrhythmia, cardiomyopathy, heart failure (including significant cor pulmonale), uncontrolled hypertension as defined by the Investigator, or any other relevant cardiovascular disorder as judged by the Investigator.
• Current cancer diagnosis requiring treatment.