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CSL312 (Garadacimab) in the Prevention of Hereditary Angioedema Attacks

The safety and scientific validity of this study is the responsibility of the study sponsor and investigators. Listing a study does not mean it has been evaluated by the U.S. Federal Government. Know the risks and potential benefits of clinical studies and talk to your health care provider before participating. Read our disclaimer for details. Identifier: NCT04656418
Recruitment Status : Recruiting
First Posted : December 7, 2020
Last Update Posted : May 6, 2021
Information provided by (Responsible Party):
CSL Behring

Brief Summary:
This is a multicenter, double-blind, randomized, placebo-controlled, parallel-arm study to investigate the efficacy and safety of subcutaneous administration of CSL312 (garadacimab) in the prophylactic treatment of hereditary angioedema

Condition or disease Intervention/treatment Phase
Hereditary Angioedema Biological: CSL312 Drug: Placebo Phase 3

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Study Type : Interventional  (Clinical Trial)
Estimated Enrollment : 60 participants
Allocation: Randomized
Intervention Model: Parallel Assignment
Masking: Quadruple (Participant, Care Provider, Investigator, Outcomes Assessor)
Primary Purpose: Prevention
Official Title: A Multicenter, Double-blind, Randomized, Placebo-controlled, Parallel-arm Study to Investigate the Efficacy and Safety of Subcutaneous Administration of CSL312 (Garadacimab) in the Prophylactic Treatment of Hereditary Angioedema
Actual Study Start Date : January 13, 2021
Estimated Primary Completion Date : July 2022
Estimated Study Completion Date : September 2022

Resource links provided by the National Library of Medicine

Arm Intervention/treatment
Experimental: CSL312
Subjects with C1-INH HAE receiving CSL312
Biological: CSL312
Fully human immunoglobulin G subclass 4/lambda recombinant monoclonal antibody
Other Names:
  • Factor XIIa antagonist monoclonal antibody
  • garadacimab

Placebo Comparator: Placebo
Subjects with C1-INH HAE receiving buffer only
Drug: Placebo
Buffer without active ingredient

Primary Outcome Measures :
  1. Time-normalized number of hereditary angioedema (HAE) attacks during treatment period [ Time Frame: up to 6 months ]

Secondary Outcome Measures :
  1. Change in the HAE attack rate during the treatment period compared to the run-in period [ Time Frame: up to 6 months ]
  2. Time-normalized number of attacks requiring on-demand treatment [ Time Frame: 6 months, and first 3 months and second 3 months ]
  3. Time-normalized number of moderate and/or severe HAE attacks [ Time Frame: 6 months, and first 3 months and second 3 months ]
  4. Time-normalized number of HAE attacks at various timepoints during the treatment period [ Time Frame: First 3 months and second 3 months and 6 months ]
  5. Percent change in the time-normalized number of HAE attacks between CSL312 and Placebo [ Time Frame: 6 months, and first 3 months and second 3 months ]
  6. Subject's Global Assessment of Response to Therapy (SGART) [ Time Frame: Up to 6 months ]
    Comparison of the distribution of responses to therapy between CSL312 and placebo based on proportions of subjects with"excellent," "good," "fair," "poor or none" response to therapy

  7. Number of subjects with adverse events, adverse events of special interest, serious adverse events, CSL312-induced anti-CSL312 antibodies, clinically significant abnormalities in laboratory assessments [ Time Frame: Up to 8 months ]
  8. Percent of subjects with Adverse events, adverse events of special interest, serious adverse events, CSL312-induced anti-CSL312 antibodies, clinically significant abnormalities in laboratory assessments [ Time Frame: Up to 8 months ]

Information from the National Library of Medicine

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Ages Eligible for Study:   12 Years and older   (Child, Adult, Older Adult)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No

Inclusion Criteria:

  • Male or female ≥ 12 years of age; diagnosed with clinically confirmed C1-INH hereditary angioedema; experience ≥ 3 attacks during the 3 months before screening

Exclusion Criteria:

  • Concomitant diagnosis of another form of angioedema such as idiopathic or acquired angioedema, recurrent angioedema associated with urticarial or hereditary angioedema type 3

Information from the National Library of Medicine

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.

Please refer to this study by its identifier (NCT number): NCT04656418

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Contact: Trial Registration Coordinator 610-878-4000

Show Show 19 study locations
Sponsors and Collaborators
CSL Behring
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Study Director: Study Director CSL Behring LLC
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Responsible Party: CSL Behring Identifier: NCT04656418    
Other Study ID Numbers: CSL312_3001
2020-000570-25 ( EudraCT Number )
First Posted: December 7, 2020    Key Record Dates
Last Update Posted: May 6, 2021
Last Verified: May 2021
Individual Participant Data (IPD) Sharing Statement:
Plan to Share IPD: Yes
Plan Description:

CSL will consider requests to share Individual Patient Data (IPD) from systematic review groups or bona-fide researchers. For information on the process and requirements for submitting a voluntary data sharing request for IPD, please contact CSL at

Applicable country specific privacy and other laws and regulations will be considered and may prevent sharing of IPD.

If the request is approved and the researcher has executed an appropriate data sharing agreement, IPD that has been appropriately anonymized will be available.

Supporting Materials: Study Protocol
Statistical Analysis Plan (SAP)
Time Frame: IPD requests may be submitted to CSL no earlier than 12 months after publication of the results of this study via an article made available on a public website.
Access Criteria:

Requests may only be made by systematic review groups or bona-fide researchers whose proposed use of the IPD is non-commercial in nature and has been approved by an internal review committee.

An IPD request will not be considered by CSL unless the proposed research question seeks to answer a significant and unknown medical science or patient care question as determined by CSL's internal review committee.

The requesting party must execute an appropriate data sharing agreement before IPD will be made available.

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Studies a U.S. FDA-regulated Drug Product: Yes
Studies a U.S. FDA-regulated Device Product: No
Additional relevant MeSH terms:
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Angioedemas, Hereditary
Vascular Diseases
Cardiovascular Diseases
Skin Diseases, Vascular
Skin Diseases
Hypersensitivity, Immediate
Immune System Diseases
Genetic Diseases, Inborn
Antibodies, Monoclonal
Immunologic Factors
Physiological Effects of Drugs