Study of the Oral Factor D (FD) Inhibitor ALXN2050 in PNH Patients as Monotherapy

Paroxysmal Nocturnal Hemoglobinuria (PNH) Clinical Trial

Official title: A Phase 2 Open-Label Proof of Concept Study to Assess the Efficacy, Safety, and Pharmacokinetics of the Oral Factor D (FD) Inhibitor ALXN2050 (ACH-0145228) in Paroxysmal Nocturnal Hemoglobinuria (PNH) Patients as Monotherapy

Status Terminated

Clinical Trial Summary

The study will evaluate the efficacy and safety of the oral Factor D (FD) inhibitor ALXN2050 (ACH-0145228) monotherapy in patients with PNH that are treatment naïve, or patients currently treated with eculizumab who still experience anemia and reticulocytosis, or patients currently treated with ALXN2040 (danicopan) as monotherapy. After signing consent, participants will have periodic visits through Week 12, at which time the primary endpoint and key secondary assessments will be analyzed. Participants will continue on treatment past 12 weeks into a long-term extension portion of the trial.

Clinical Trial Description

Experimental: Open-label ALXN2050 Monotherapy orally

Group 1: Patients with PNH who are treatment naïve

Group 2: Patients with PNH who have received complement component 5 (C5) inhibition with eculizumab for at least 6 months, who continue to experience anemia and reticulocytes above the upper limit of normal (ULN) who will switch to ALXN2050 monotherapy

Group 3: Patients with PNH receiving danicopan monotherapy in study ACH471-103 will switch to ALXN2050 monotherapy

After signing the informed consent form, participants will enter the screening period. During the Screening Period, eligibility and screening assessments will be performed. Screening assessments may be spread over more than one visit if necessary. At the baseline visit, screened participants who continue to meet eligibility criteria will enter the Treatment Period.

The treatment phase will be followed by a long-term extension phase, where ALXN2050 will continue to be administered.

Blood will be collected to assess the efficacy endpoints, such as, change in hemoglobin (Hgb), lactate dehydrogenase (LDH), and other measures of hemolysis. Safety and transfusion requirements will also be assessed.

Participants will continue on treatment past 12 weeks in a long-term extension portion of the trial. ;

Related Conditions & MeSH terms

• Hemoglobinuria
• Hemoglobinuria, Paroxysmal
• Paroxysmal Nocturnal Hemoglobinuria (PNH)

• NCT number: NCT04170023
• Study type: Interventional
• Source: Alexion Pharmaceuticals, Inc.
• Status: Terminated
• Phase: Phase 2
• Start date: December 16, 2019
• Completion date: March 20, 2024