Safety, Tolerability, and Pharmacokinetics of PTI-808, PTI-801, and PTI-428 Combination Therapy in Subjects With Cystic Fibrosis
Phase 1
Completed
- Conditions
- Cystic Fibrosis
- Interventions
- Registration Number
- NCT03500263
- Lead Sponsor
- Proteostasis Therapeutics, Inc.
- Brief Summary
The study is a randomized, double-blind, placebo-controlled, study that will be conducted at multiple centers in subjects with Cystic Fibrosis (CF) who are either homozygous for the F508del mutation or heterozygous with at least copy of the F508del mutation.
- Detailed Description
Study PTI-808-02 will enroll up to approximately 32 subjects. Subjects in the first cohort will receive PTI-808 and PTI-801. Following completion of Cohort 1, initiation of enrollment into subsequent cohorts will be based upon review and approval by the Safety Review Committee (SRC).
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 12
Inclusion Criteria
- Cohorts 1,2 and 4: A Confirmed diagnosis of CF with the F508del/F508del CFTR genotype on record, along with clinical findings consistent with CF such as chronic sinopulmonary disease or gastrointestinal/nutritional abnormalities
- Cohort 3 only: Confirmed diagnosis of CF with at least one copy of the F508del CFTR mutation on record, along with clinical findings consistent with CF, such as chronic sinopulmonary disease or gastrointestinal / nutritional abnormalities
- Forced expiratory volume in 1 second (FEV1) 40-90% predicted, inclusive
- Non-smoker and non-tobacco user for a minimum of 30 days prior to screening
- Cohort 3 only: A sweat chloride value of ≥60 mmol/L based on quantitative pilocarpine iontophoresis (as documented in the subject's medical record or as confirmed at the screening visit)
Exclusion Criteria
- Currently taking or has taken a CFTR modulator within 30 days prior to initial dose of study drugs
- Participation in another clinical trial or treatment with an investigational agent within 28 days or 5 half-lives, whichever is longer, prior to Study Day 1
- History of cancer within the past 5 years
- History of organ transplantation
- Hospitalization, sinopulmonary infection, CF exacerbation, or other clinically significant infection or illness (as determined by the investigator) requiring an increase or addition of medication, such as antibiotics or corticosteroids, within 14 days of Day 1
- Initiation of any new chronic therapy (e.g., ibuprofen, hypertonic saline, azithromycin, Pulmozyme®, Cayston®, TOBI®) or any change in chronic therapy (excluding pancreatic enzyme replacement therapy) within 28 days prior to Day 1
- History or current evidence of alcohol or drug abuse or dependence within 12 months of screening as determined by the investigator
- Pregnant or nursing women
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- PARALLEL
- Arm && Interventions
Group Intervention Description Cohorts 1 and 2: PTI-808 Active Co-admin with PTI-801 Active PTI-808 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohorts 1 and 2: PTI-808 Placebo Co-admin with PTI-801 Placebo Placebo Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohort 3 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-808 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohort 3 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-428 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohort 3 PTI-808 placebo + PTI-801 Placebo + PTI-428 Placebo Placebo Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohort 4 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-808 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for 7 days immediately followed by PTI-808 co-administered with PTI-801 or placebos once-a-day for 7 days. A follow-up visit will occur on Day 21. Cohort 4 PTI-808 Placebo + PTI-801 Placebo + PTI-428 Placebo Placebo Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for 7 days immediately followed by PTI-808 co-administered with PTI-801 or placebos once-a-day for 7 days. A follow-up visit will occur on Day 21. Cohort 4 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-428 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for 7 days immediately followed by PTI-808 co-administered with PTI-801 or placebos once-a-day for 7 days. A follow-up visit will occur on Day 21. Cohort 3 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-801 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohorts 1 and 2: PTI-808 Active Co-admin with PTI-801 Active PTI-801 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 or placebos once-a-day for a total of 14 days. A follow up visit will occur on Day 21. Cohort 4 PTI-808 Active + PTI-801 Active + PTI-428 Active PTI-801 Subjects will be randomized to receive either PTI-808 co-administered with PTI-801 and PTI-428 or placebos once-a-day for 7 days immediately followed by PTI-808 co-administered with PTI-801 or placebos once-a-day for 7 days. A follow-up visit will occur on Day 21.
- Primary Outcome Measures
Name Time Method Safety and tolerability measured by the number of subjects who experience adverse events and potentially significant clinical laboratory assessments, electrocardiography, physical examinations, vital signs. Baseline through Day 21
- Secondary Outcome Measures
Name Time Method Apparent terminal half-life (t1/2) of multiple oral doses of PTI-808 + PTI-801 and PTI-428 (cohorts 3 & 4 only) Day 1 through 15 Time to reach maximum plasma concentration (Tmax) of multiple oral doses of PTI-808 + PTI-801 and PTI-428 (cohorts 3 & 4 only) Day 1 through 15 Maximum plasma concentration (Cmax) of multiple oral doses of PTI-808 + PTI-801 and PTI-428 (cohorts 3 & 4 only) Day 1 through 15 Change in FEV1 over time Baseline through Day 21
Trial Locations
- Locations (4)
Western General Hospital
🇬🇧Edinburgh, United Kingdom
Queen Elizabeth University Hospital
🇬🇧Glasgow, United Kingdom
Medicines Evaluation Unit
🇬🇧Manchester, United Kingdom
Celerion
🇬🇧Belfast, United Kingdom