OASIS-HAE: A Study to Evaluate the Safety and Efficacy of Donidalorsen (ISIS 721744 or IONIS-PKK-LRx) in Participants With Hereditary Angioedema (HAE)

February 13, 2025 updated by: Ionis Pharmaceuticals, Inc.

A Phase 3 Double-Blind, Placebo-Controlled Study to Evaluate the Efficacy and Safety of ISIS 721744 in Patients With Hereditary Angioedema (HAE)

The purpose of this study was to evaluate the safety and efficacy of donidalorsen in participants with HAE and effect of donidalorsen on the quality and pattern of HAE attacks and their impact on quality of life (QoL).

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.

Detailed Description

This was a Phase 3, multi-center, double-blind, randomized, placebo-controlled study of donidalorsen in 91 participants. Participants were randomly assigned in a 2:1 ratio to Cohort A (donidalorsen or placebo every 4 weeks) or Cohort B (donidalorsen or placebo every 8 weeks), respectively. Within each Cohort, participants were randomized in a 3:1 ratio to receive donidalorsen or matching-placebo. The study included an up to 8-week Screening Period, a 24-week Treatment Period, and an up to 13-week Post-treatment Period.

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.
91

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

Expanded Access

Expanded Access

A way for patients with serious diseases or conditions who cannot participate in a clinical trial to gain access to a medical product that has not been approved by the U.S. Food and Drug Administration (FDA). Also called compassionate use. There are different expanded access types.
Available

Available

  • Available: Expanded access is currently available for this investigational treatment, and patients who are not participants in the clinical study may be able to gain access to the drug, biologic, or medical device being studied.
  • No longer available: Expanded access was available for this intervention previously but is not currently available and will not be available in the future.
  • Temporarily not available: Expanded access is not currently available for this intervention but is expected to be available in the future.
  • Approved for marketing: The intervention has been approved by the U.S. Food and Drug Administration for use by the public.
 outside the clinical trial. See expanded access record.

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

  • Belgium
      • Brussels, Belgium, 1020
        • Ionis Investigative Site
      • Brussels, Belgium, 1200
        • Ionis Investigative Site
      • Edegem, Belgium, 2650
        • Ionis Investigative Site
  • Bulgaria
      • Sofia, Bulgaria, 1431
        • Ionis Investigative Site
      • Sofia, Bulgaria, 1680
        • Ionis Investigative Site
  • Canada
      • Edmonton, Canada, T6G 2G3
        • Ionis Investigative Site
    • Ontario
      • Ottawa, Ontario, Canada, K1G6C6
        • Ionis Investigative Site
  • Denmark
      • Odense, Denmark, 5000
        • Ionis Investigative Site
  • France
      • La Tronche, France, 38700
        • Ionis Investigative Site
      • Marseille, France, 13385
        • Ionis Investigative Site
      • Paris, France, 75012
        • Ionis Investigative Site
  • Germany
      • Berlin, Germany, 12203
        • Ionis Investigative Site
      • Frankfurt, Germany, 60590
        • Ionis Investigative Site
      • Munich, Germany, 81675
        • Ionis Investigative Site
  • Israel
      • Ashkelon, Israel, 78278
        • Ionis Investigative Site
      • Haifa, Israel, 3104802
        • Ionis Investigative Site
      • Tel Aviv, Israel, 6423906
        • Ionis Investigative Site
  • Italy
      • Catania, Italy, 95124
        • Ionis Investigative Site
      • Milan, Italy, 20138
        • Ionis Investigative Site
      • Napoli, Italy, 80131
        • Ionis Investigative Site
      • Padova, Italy, 35128
        • Ionis Investigative Site
      • Palermo, Italy, 90146
        • Ionis Investigative Site
  • Netherlands
      • Amsterdam, Netherlands, 1105 AZ
        • Ionis Investigative Site
      • Groningen, Netherlands, 9713 GZ
        • Ionis Investigative Site
  • Poland
      • Kraków, Poland, 31-503
        • Ionis Investigative Site
  • Spain
      • Barcelona, Spain, 08035
        • Ionis Investigative Site
      • Barcelona, Spain, 8907
        • Ionis Investigative Site
      • Madrid, Spain, 28046
        • Ionis Investigative Site
      • Sevilla, Spain, 41013
        • Ionis Investigative Site
      • Valencia, Spain, 46026
        • Ionis Investigative Site
  • Turkey
      • Ankara, Turkey, 6230
        • Ionis Investigative Site
      • Istanbul, Turkey, 34093
        • Ionis Investigative Site
      • İzmir, Turkey, 35100
        • Ionis Investigative Site
  • United Kingdom
      • Birmingham, United Kingdom, B9 5SS
        • Ionis Investigative Site
      • Bristol, United Kingdom, BS10 5NB
        • Ionis Investigative Site
      • London, United Kingdom, E1 1FR
        • Ionis Investigative Site
  • United States
    • Arizona
      • Scottsdale, Arizona, United States, 85251
        • Ionis Investigative Site
    • California
      • San Diego, California, United States, 92122
        • Ionis Investigative Site
      • Santa Monica, California, United States, 90404
        • Ionis Investigative Site
      • Walnut Creek, California, United States, 94598
        • Ionis Investigative Site
    • Colorado
      • Colorado Springs, Colorado, United States, 80907
        • Ionis Investigative Site
    • Florida
      • Tampa, Florida, United States, 33613
        • Ionis Investigative Site
    • Kansas
      • Kansas City, Kansas, United States, 66205
        • Ionis Investigative Site
    • Massachusetts
      • Boston, Massachusetts, United States, 02114
        • Ionis Investigative Site
    • Michigan
      • Ann Arbor, Michigan, United States, 48109
        • Ionis Investigative Site
    • Missouri
      • Saint Louis, Missouri, United States, 63110
        • Ionis Investigative Site
    • Ohio
      • Columbus, Ohio, United States, 43235
        • Ionis Investigative Site
      • Toledo, Ohio, United States, 43617
        • Ionis Investigative Site
    • Pennsylvania
      • Hershey, Pennsylvania, United States, 17033
        • Ionis Investigative Site
    • Texas
      • Dallas, Texas, United States, 75231
        • Ionis Investigative Site
    • Utah
      • Murray, Utah, United States, 84107
        • Ionis Investigative 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

12 years and older (Child, Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Key Inclusion Criteria

  1. Participants, or their legally appointed and authorized representatives, must provide written and signed informed consent form (ICF)/assent
  2. Participants must be aged ≥ 12 years at the time of informed consent and, as applicable, assent
  3. Participants must have a documented diagnosis of hereditary angioedema type 1 (HAE-1)/hereditary angioedema type 2 (HAE-2)

  4. Participants must:

    1. Experience a minimum of 2 HAE attacks (confirmed by the Investigator) during the Screening Period
    2. Be willing to complete the participant reported outcomes (PRO) assessments throughout the study
  5. Participants must have access to, and the ability to use acute medication(s) to treat angioedema attacks

Key Exclusion Criteria

  1. Concurrent diagnosis of any other type of recurrent angioedema, including acquired, idiopathic angioedema or HAE with normal C1-INH (also known as HAE Type III)
  2. Any clinically-significant abnormalities in screening laboratory values that would render a participant unsuitable for inclusion in the study
  3. Treatment with another investigational drug or biological agent within 1 month or 5 half-lives, whichever is longer, of Screening
  4. Participated in a prior ISIS 721744 study

  5. Exposure to any of the following medications:

    1. Angiotensin-converting enzyme (ACE) inhibitors or any estrogen containing medications with systemic absorption within 4 weeks prior to Screening
    2. Chronic prophylaxis with Takhzyro, Haegarda, Cinryze and Ruconest or Orladeyo within 5 half-lives prior to Screening
    3. Oligonucleotides (including small interfering ribonucleic acid [siRNA]) within 4 months of Screening if single dose received, or within 12 months of Screening if multiple doses received. This exclusion does not apply to vaccines
  6. Recent history (3 years) of, or current drug or alcohol abuse

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Quadruple

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.
Placebo Comparator: Pooled Placebo
Participants with hereditary angioedema type I/type II (HAE-1/HAE-2) received placebo subcutaneously (SC) either every 4 weeks (Weeks 1, 5, 9, 13, 17, and 21) or 8 weeks (Weeks 1, 9, and 17)
Drug: Donidalorsen
Donidalorsen was administered by SC injection.
Experimental: Cohort A: Donidalorsen 80 mg
Participants with HAE-1/HAE-2 received donidalorsen, 80 mg, SC, every 4 weeks at Weeks 1, 5, 9, 13, 17, and 21.
Drug: Donidalorsen
Donidalorsen was administered by SC injection.
Experimental: Cohort B: Donidalorsen 80 mg
Participants with HAE-1/HAE-2 received donidalorsen, 80 mg, SC, every 8 weeks at Weeks 1, 9, and 17.
Drug: Placebo
Donidalorsen-matching placebo was administered by SC injection.

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
Time-Normalized Investigator-Confirmed (IC) HAE Attack Rate (Per Month) From Week 1 to Week 25
Time Frame: Week 1 to Week 25
The time-adjusted HAE attack rate was calculated as number of IC HAE attacks occurring from Week 1 to Week 25, divided by the number of days the participant contributed to the period multiplied by 28 days. An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx).
Week 1 to Week 25

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
Time-Normalized IC HAE Attack Rate (Per Month) From Week 5 to Week 25
Time Frame: Week 5 to Week 25
The time-adjusted HAE attack rate was calculated as number of IC HAE attacks occurring from Week 5 to Week 25, divided by the number of days the participant contributed to the period multiplied by 28 days. An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx).
Week 5 to Week 25
Percentage of IC HAE Attack-Free Participants From Week 5 to Week 25
Time Frame: Week 5 to Week 25
An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Percentages are rounded off to the nearest decimal.
Week 5 to Week 25
Time-Normalized Moderate or Severe IC HAE Attack Rate (Per Month) From Week 5 to Week 25
Time Frame: Week 5 to Week 25
The time-adjusted HAE attack rate was calculated as number of investigator-confirmed moderate or severe HAE attacks occurring from Week 5 to Week 25, divided by the number of days the participant contributed to the period multiplied by 28 days. An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx).
Week 5 to Week 25
Number of Participants With a Clinical Response From Week 5 to Week 25
Time Frame: Week 5 to Week 25
Clinical response was defined as a ≥ 50%, ≥ 70%, or ≥ 90% reduction from Baseline in HAE attack rate from Week 5 to Week 25. The HAE attack rate between Week 5 and Week 25 for each participant is calculated as number of HAE attacks occurring from Week 5 to week 25 divided by the number of days the participant contributed to the period multiplied by 28 days. An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). Baseline= Run-in period which is the period from screening to the last day prior to Study Day 1.
Week 5 to Week 25
IC HAE Attack Rate Requiring Acute HAE Therapy From Week 5 to Week 25
Time Frame: Week 5 to Week 25
Time-adjusted HAE attack rate is calculated as number of IC HAE attacks requiring acute therapy occurring from Week 5 to Week 25, divided by number of days the participant contributed to period multiplied by 28 days. An HAE attack was defined as an event with signs or symptoms consistent with an attack in at least 1 of the locations: peripheral angioedema (cutaneous swelling involving an extremity, the face, neck, torso, and/or genitourinary region), abdominal angioedema (abdominal pain, with or without abdominal distention, nausea, vomiting, or diarrhea), laryngeal angioedema (stridor, dyspnea, difficulty speaking, difficulty swallowing, throat tightening, or swelling of the tongue, palate, uvula, or larynx). HAE attacks requiring acute therapy included those attacks with following concomitant medications c1 esterase inhibitors (human and recombinant), plasma kallikrein inhibitor (human), and bradykinin antagonist.
Week 5 to Week 25
Percentage of Participants Who Are Well Controlled on the Angioedema Control Test (AECT) at Week 25
Time Frame: Week 25
The AECT is a validated participant-reported outcome instrument to assess disease activity in participants with recurrent angioedema. The questionnaire consists of 4 questions asking about the frequency and severity of angioedema experienced in last 4 weeks. Each question has 5 response choices with total score ranging from 0 to 16. The AECT can be used to identify participants with poorly controlled disease by working with a cutoff value of greater than or equal to 10 points. Participants who score less than 10 points (0-9) in the AECT have poorly controlled disease whereas participants with well-controlled disease score 10-16 points. Percentages are rounded off to the nearest decimal.
Week 25
Change From Baseline in Angioedema Quality of Life (AE-QoL) Questionnaire Total Score at Week 25
Time Frame: Week 25
The AE-QoL questionnaire is a validated tool to assess symptom-specific health-related QOL impairment in participants suffering from recurrent angioedema. It is a self-administered questionnaire comprising 17 questions across 4 domains: functioning, fatigue/mood, fears/shame, and food. The responses are scored from 0 to 4 where, 0 = never, 1 = rarely, 2 = occasionally, 3 = often, 4 = very often. The AE-QoL domain scores and total score were calculated by using the following formula: (Sum score of all completed items) / (maximum sum score of all possible items) × 100. Total scores ranges from 0 to 100, with higher scores indicating greater impairment. Negative change from baseline indicates improvement. The calculated domain and total scores were not raw scores but linear transformations to a 0 to 100 scale. Baseline is defined as the score on Study Day 1.
Week 25

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.
Ionis 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.

General Publications

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.
December 3, 2021

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.
November 9, 2023

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.
November 9, 2023

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).
November 18, 2021

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.
November 18, 2021

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.
December 1, 2021

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.
March 25, 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.
February 13, 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.
February 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.
  • ISIS 721744-CS5
  • 2021-002571-19 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Ionis may share anonymized individual participant data, aggregated clinical data, and other types of data that support the results in this study. Data requests from qualified researchers will be considered once all three of the following criteria are met: (1) 12 months from marketing approval of the study drug in both the United States and European Union; (2) 18 months from conclusion of the study; and (3) 6 months from publication of study article. Access would be via a secure environment and is contingent upon approval of a research proposal and entry into an appropriate data use agreement. Requests to access data can be submitted via the website https://vivli.org/ourmember/ionis/.

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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