Efficacy, Safety, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Ravulizumab in Chinese Adults Participants With Paroxysmal Nocturnal Hemoglobinuria (PNH)

May 11, 2026 updated by: Alexion Pharmaceuticals, Inc.

A Phase 3, Single-arm, Open-label, Multicenter Study to Assess the Efficacy, Safety, Pharmacokinetics, Pharmacodynamics, and Immunogenicity of Ravulizumab in Complement Inhibitor Treatment Naïve Adult Participants With Paroxysmal Nocturnal Hemoglobinuria (PNH) in China

The primary objective of this study is to evaluate the efficacy of ravulizumab in adult participants with PNH.

Study Overview

Status

Status

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

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 (Actual)

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.
18

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

  • China
      • Beijing, China, CN-100730
        • Research Site
      • Guangzhou, China, 510100
        • Research Site
      • Hangzhou, China, 310003
        • Research Site
      • Nantong, China, 226001
        • Research Site
      • Shanghai, China, 200040
        • Research Site
      • Tianjin, China, 300020
        • Research Site
      • Tianjin, China, 300050
        • Research Site
      • Wuhan, China, 430022
        • 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

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Adult C5 inhibitor naive PNH patients (age>=18), which is confirmed by flow cytometry evaluation.
  • Must be vaccinated againast N meningitidis.

Exclusion Criteria

  • Meningitidis infection or unresolved meningococcal disease
  • History of bone marrow transplantation
  • Other significant systemic diseases that might have impact on efficacy and safety assessment

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: N/A
  • 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: Ravulizumab
During the Primary Treatment Period, participants will receive a weight-based loading dose of ravulizumab on Day 1 followed by weight-based maintenance dose of ravulizumab on Day 15 and once every 8 weeks (q8w) thereafter for a total of 26 weeks. On Day 183, all participants will enter a 32-week Extension Treatment Period and receive ravulizumab. Beginning on Day 183, participants will receive a maintenance dose of ravulizumab q8w for an additional 32 weeks.
Drug: Ravulizumab
Ravulizumab will be administered by intravenous (IV) infusion.
Other Names:
  • ALXN1210

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
Measure Description
Time Frame
Percentage Change in Lactate Dehydrogenase (LDH) From Baseline to Day 183 (Week 26)
Time Frame: Baseline, Day 183 (Week 26)
LDH is an indicator of intravascular hemolysis that occurs in participants with paroxysmal nocturnal hemoglobinuria. A decrease in LDH indicated reduction (improvement) in hemolysis. Baseline was defined as the average of all available on-study assessments prior to the first dose of study drug. The percent change in LDH was analyzed using a mixed-effect model for repeated measures (MMRM) with the fixed categorical effect of visit, fixed continuous effect of the LDH baseline value as covariates, and participant as random effect.
Baseline, Day 183 (Week 26)

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
Measure Description
Time Frame
Percentage of Participants Achieving LDH <1.5 * Upper Limit of Normal (ULN) at Day 183 (Week 26)
Time Frame: Day 183 (Week 26)
LDH is an indicator of intravascular hemolysis that occurs in participants with paroxysmal nocturnal hemoglobinuria. A decrease in LDH indicated reduction (improvement) in hemolysis. Baseline was defined as the average of all available on-study assessments prior to the first dose of study drug.
Day 183 (Week 26)
Percentage of Participants Achieving Transfusion Avoidance Through Day 183 (Week 26)
Time Frame: Day 183 (Week 26)
Transfusion avoidance was defined as the percentage of participants who remained transfusion free and did not require a transfusion per protocol-specified guidelines (hemoglobin value of ≤9 grams (g)/deciliter (dL) with signs or symptoms of sufficient severity to warrant a transfusion, or a hemoglobin value of ≤7 g/dL regardless of presence of clinical signs or symptoms) through Day 183.
Day 183 (Week 26)
Percentage of Participants Experiencing Breakthrough Hemolysis Through Day 183 (Week 26)
Time Frame: Day 183 (Week 26)
Breakthrough hemolysis was defined as at least one new or worsening symptom or sign of intravascular hemolysis (fatigue, hemoglobinuria, abdominal pain, dyspnea, anemia [hemoglobin <10 g/dL], major adverse vascular event [including thrombosis], dysphagia, or erectile dysfunction) in the presence of elevated LDH ≥2 times the ULN.
Day 183 (Week 26)
Change in Functional Assessment of Chronic Illness Therapy-Fatigue Scale (FACIT-Fatigue) Score From Baseline to Day 183 (Week 26)
Time Frame: Baseline, Day 183 (Week 26)
The FACIT-Fatigue is a 13-item questionnaire that assesses self-reported fatigue and its impact upon daily activities and function over the preceding 7 days. Participants scored each item on a 5-point scale: 0 (Not at all) to 4 (Very much). Total scores range from 0 to 52, with a higher score indicating better quality of life. Analysis was using a mixed-effect model for repeated measures (MMRM) with the fixed categorical effect of visit, fixed continuous effect of the baseline value of FACIT-Fatigue score as covariates, and participant as random effect.
Baseline, Day 183 (Week 26)
Change in Hemoglobin (Hgb) From Baseline to Day 183 (Week 26)
Time Frame: Baseline, Day 183 (Week 26)
Analysis was performed using MMRM with the fixed categorical effect of visit, fixed continuous effect of the Hgb baseline value as covariates, and participant as random effect.
Baseline, Day 183 (Week 26)

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.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

Helpful Links

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.
October 10, 2024

Primary Completion (Actual)

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 15, 2025

Study Completion (Actual)

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.
December 22, 2025

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).
August 28, 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.
August 28, 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.
August 30, 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.
June 5, 2026

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.
May 11, 2026

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.
May 1, 2026

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.
  • D9289C00008
  • ALXN1210-PNH-323 (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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