Study of Danicopan as Add-on Treatment to Ravulizumab or Eculizumab in Pediatric Participants With PNH Who Have Clinically Significant Extravascular Hemolysis

December 19, 2025 updated by: Alexion Pharmaceuticals, Inc.

A Phase 3 Open-Label Study of Danicopan as Add-on Treatment to Ravulizumab or Eculizumab in Pediatric Participants With Paroxysmal Nocturnal Hemoglobinuria Who Have Clinically Significant Extravascular Hemolysis

The primary objective of this study is to evaluate efficacy of danicopan as add-on treatment to ravulizumab or eculizumab as assessed by hemoglobin (Hgb) change from Baseline at Week 12 in pediatric participants with paroxysmal nocturnal hemoglobinuria (PNH) and clinically significant extravascular hemolysis (CS-EVH).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
6

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • Canada
    • Saskatchewan
      • Saskatoon, Saskatchewan, Canada, S7N 0W8
        • Recruiting
        • Research Site
  • France
      • Paris, France, 77019
        • Recruiting
        • Research Site
  • United Kingdom
      • Leeds, United Kingdom, LS9 7TF
        • Recruiting
        • Research Site
      • London, United Kingdom, SE5 9RS
        • Recruiting
        • Research Site

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Child

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Confirmed diagnosis of PNH.
  • CS-EVH defined by: Anemia: Hgb ≤ 11.0 g/dL, and absolute reticulocyte count ≥ 100 × 109/L
  • Treated with ravulizumab or eculizumab for at least 12 weeks immediately preceding Day 1, the dose received should be stable during this period, and there should be no anticipated changes in dosage or interval during the first 12 weeks of this study.
  • all participants must be vaccinated against meningococcal infection from serogroups A, C, W, and Y and serogroup B within 3 years prior to, or at least 14 days prior to Day 1
  • vaccinated against Haemophilus influenzae type b (Hib) and Streptococcus pneumoniae

Exclusion Criteria:

  • Platelet count < 30000/μL or there is a need for platelet transfusions.
  • ANC < 500/μL.

  • Clinically significant laboratory abnormalities related to liver function, including:

    • ALT > 2 × ULN or ALT > 3 × ULN for participants with documented liver iron overload defined by serum ferritin values ≥ 500 ng/mL.
    • Direct bilirubin > 2 × ULN, unless, in the Investigator's opinion, is due to hemolysis or Gilbert's syndrome based on medical history.
  • Current evidence of biliary cholestasis.
  • Known aplastic anemia or other bone marrow failure that requires HSCT or other therapies, including anti-thymocyte globulin and immunosuppressants unless the dosage of immunosuppressant has been stable for at least 12 weeks before Day 1 and is expected to remain stable through Week 12.
  • History of a major organ transplant (eg, heart, lung, kidney, liver) or HSCT.
  • Known or suspected complement deficiency.
  • Active bacterial or viral infection, a body temperature > 38°C on 2 consecutive daily measures, evidence of other infection, or history of any febrile illness within 14 days prior to first study intervention administration.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: Non-Randomized
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: Danicopan
Participants will receive a 12-week weight-based open-label treatment period and up to 1 year open-label long term extension period.
Drug: Danicopan
Participants will receive danicopan on a weight-based dosing regimen.

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Time Frame
Change From Baseline in Hemoglobin (Hgb) Concentration at Week 12
Time Frame: Baseline, Week 12
Baseline, Week 12

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Time Frame
Maximum Plasma Concentration (Cmax) of Danicopan
Time Frame: Day 1 up to Week 12
Day 1 up to Week 12
Number of Participants With Transfusion Avoidance Through Weeks 12 and 24
Time Frame: Weeks 12 and 24
Weeks 12 and 24
Change From Baseline in Absolute Reticulocyte Count at Weeks 12 and 24
Time Frame: Baseline, Weeks 12 and 24
Baseline, Weeks 12 and 24
Change From Baseline in Pediatric Quality of Life Inventory (PedsQL) Generic Core Scales Score at Weeks 12 and 24
Time Frame: Baseline, Weeks 12 and 24
Baseline, Weeks 12 and 24
Change from Baseline in Pediatric Functional Assessment of Chronic Illness Therapy (FACIT)-Fatigue Score at Weeks 12 and 24
Time Frame: Baseline, Weeks 12 and 24
Baseline, Weeks 12 and 24
Acceptability and Palatability Questionnaire Score
Time Frame: Week 2
Week 2
Change from Baseline in Hgb Concentration at Week 24
Time Frame: Baseline, Week 24
Baseline, Week 24
Change from Baseline in Serum Alternative Pathway (AP) Activity
Time Frame: Baseline up to Week 64
Baseline up to Week 64
Change from Baseline in Plasma Bb Concentrations
Time Frame: Baseline up to Week 64
Baseline up to Week 64

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Alexion Pharmaceuticals, Inc.

Collaborators

Collaborators

An organization other than the sponsor that provides support for a clinical study. This support may include activities related to funding, design, implementation, data analysis, or reporting.
AstraZeneca

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 11, 2025

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
May 28, 2027

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 10, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 3, 2024

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 3, 2024

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 7, 2024

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
December 23, 2025

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
December 19, 2025

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
December 1, 2025

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • D7332C00006
  • ALXN2040-PNH-302 (Other Identifier: Alexion)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Alexion has a public commitment to allow requests for access to study data and will be supplying a protocol, CSR, and plain language summaries.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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