OPTION: A Trial to Assess the Safety & Efficacy of MS1819 in Patients With Exocrine Pancreatic Insufficiency Due to Cystic Fibrosis

A Phase 2, Open-Label, Multicenter, 2x2 Crossover Trial to Assess the Safety and Efficacy of MS1819-SD in Patients With Exocrine Pancreatic Insufficiency Due to Cystic Fibrosis

The primary objectives of this study are to assess the safety and efficacy of MS1819-SD vs porcine pancreatic enzyme replacement therapy (PERT) in patients with exocrine pancreatic insufficiency (EPI) due to cystic fibrosis (CF).

This is a Phase 2, open-label, multi-center, 2x2 crossover study assessing the safety and efficacy of MS1819-SD (spray dried) vs porcine PERT given at the same dose that was being administered during the pre-study period.

MS1819-SD will be assessed in a 2x2 crossover including at least 30 patients completing both periods.

Inclusion Criteria:

1. Cystic fibrosis, based on 2 clinical features consistent with CF, plus initial diagnostic sweat chloride ≥ 60 mmol/L
2. Under stable dose of porcine PERT
3. A fair or better nutritional status
4. Fecal elastase <100 µg/g
5. Standard-of-care medications including Cystic Fibrosis Transmembrane Conductance Regulator (CFTR) modulators are allowed

Exclusion Criteria:

1. History or diagnosis of fibrosing colonopathy
2. Any chronic diarrheal illness unrelated to pancreatic insufficiency
3. Alanine aminotransferase (ALT) or aspartate aminotransferase (AST) level ≥5 ×upper limit of normal (ULN), or total bilirubin level ≥1.5 ×ULN at the Screening visit
4. Feeding via an enteral tube during 6 months before screening
5. Forced expiratory volume ≤30% at the Screening visit