Study to Evaluate the Efficacy, Safety, Tolerability, Pharmacokinetics, and Pharmacodynamics of Sapablursen (Formerly ISIS 702843, IONIS-TMPRSS6-LRx)

February 14, 2025 updated by: Ionis Pharmaceuticals, Inc.

A Phase 2a, Randomized, Open-Label Study to Evaluate the Efficacy, Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of ISIS 702843 Administered Subcutaneously to Patients With Non-Transfusion Dependent β-Thalassemia Intermedia

The purpose was to evaluate the efficacy, safety, tolerability, pharmacokinetics and pharmacodynamics of sapablursen administered subcutaneously to participants with non-transfusion dependent β-Thalassemia Intermedia.

Study Overview

Status

Status

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

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 multi-center, randomized, open-label study in up to 29 participants. The duration of participation for each subject in the study was approximately 29 months and included an approximately 2-month screening period, a 24-month treatment period, and a 3-month 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.
29

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 2

Contacts and Locations

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

Study Locations

  • Australia
    • New South Wales
      • Camperdown, New South Wales, Australia, 2050
        • Royal Prince Alfred Hospital
    • Victoria
      • Clayton, Victoria, Australia, 3168
        • Monash Medical Centre
    • Western Australia
      • Perth, Western Australia, Australia, 6000
        • Royal Perth Hospital
  • Greece
    • Attica
      • Athens, Attica, Greece, 115 27
        • Aghia Sophia General Children's Hospital
    • Peloponnese
      • Patra, Peloponnese, Greece, 26 504
        • University General Hospital of Patras
    • Thessaly
      • Larissa, Thessaly, Greece, 412 21
        • Koutlimbaneio & Triantafylleio General Hospital of Larissa
  • Lebanon
      • Hazmiyeh, Lebanon
        • Chronic Care Center
  • Thailand
      • Bangkok, Thailand, 10700
        • Siriraj Hospital
      • Chiang Mai, Thailand, 50200
        • Maharaj Nakorn Chiang Mai Hospital
      • Khon Kaen, Thailand, 40002
        • Srinagarind Hospital
      • Pathum Thani, Thailand, 12120
        • Thammasat University Hospital
      • Pathum Wan, Thailand, 10330
        • King Chulalongkorn Memorial Hospital
      • Phitsanulok, Thailand, 65000
        • Naresuan University Hospital
      • Songkhla, Thailand, 90110
        • Songklanagarind Hospital
  • Turkey
      • Adana, Turkey, 1330
        • Cukurova Üniversitesi Tıp Fakültesi
      • Ankara, Turkey, 6100
        • Hacettepe Üniversitesi Tıp Fakültesi
      • Antalya, Turkey, 07070
        • Akdeniz University Faculty of Medicine
      • Topkapı, Turkey, 34093
        • İstanbul Üniversitesi - Istanbul Tıp Fakültesi
      • İzmir, Turkey, 35100
        • Ege Üniversitesi Tip Fakültesi

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

18 years to 65 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Willingness to comply with study procedures
  • Clinical diagnosis of Beta-Thalassemia Intermedia with genotypic confirmation
  • Non-transfusion dependent, as defined by: no more than 6 transfusions in the past 12-month period, and no transfusions in the 8-week period prior to Day 1
  • Mean Hb within the range of 6.0-10.0 g/dL, inclusive at Screening
  • LIC within the range of 3.0-20.0 mg Fe/g dry weight, inclusive
  • If using chelators, must be on a stable dose for at least 3 months with liver iron concentration (LIC) > 5.0 mg iron (Fe) per gram of dry weight of liver (Fe/g) dry weight and serum ferritin > 300 nanograms per milliliter (ng/mL)
  • Females must be non-pregnant and non-lactating, and either surgically sterile or postmenopausal
  • Males must be surgically sterile, abstinent or using an acceptable contraceptive method

Exclusion Criteria:

  • Clinically significant abnormalities in lab values, medical history, or physical examination
  • α-globin gene triplication
  • Symptomatic splenomegaly
  • Platelet count < lower limit of normal (LLN) or > 1,000 x 10^9/L
  • Significant concurrent/recent coagulopathy, history of non-traumatic significant bleeding; history of immune thrombocytopenic purpura (ITP); current use of SC anti-coagulants; history of thrombotic events, including stroke or DVT
  • Clinically significant renal, liver or cardiac dysfunction
  • Uncontrolled hypertension (> 140 mm Hg systolic or > 90 mm Hg diastolic)
  • Fasting blood glucose > 2.0 × upper limit of normal (ULN)
  • Inability to have a magnetic resonance imaging (MRI) scan
  • Known history or positive test for human immunodeficiency virus (HIV), hepatitis C (HCV), or hepatitis B (HBV)
  • Active infection requiring systemic antiviral or antimicrobial therapy
  • Regular excessive use of alcohol
  • Recent start of hydroxyurea (6 months prior to Day 1)

  • Treatment with or recent exposure to another investigational drug, biological agent, antisense oligonucleotide (ASO), small interfering ribonucleic acid (siRNA), or device within 1 month of Screening, or 5 half-lives of investigational agent, whichever is longer; or treatment with or exposure to:

    • sotatercept (ACE-011), luspatercept (ACE-536), or ruxolitinib within 4 months of Screening
    • hematopoietic stimulating agents or any hypoxia-inducible factor prolyl hydroxylase inhibitors within 8 weeks of Day 1
    • prior bone marrow transplant, stem cell transplant, or gene therapy
  • Surgery associated with significant blood loss within 4 months of Screening, splenectomy within 12 months of Screening, or splenectomy scheduled during treatment

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: 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: Cohort A: Sapablursen
Subjects initially received 30 mg/0.3 mL of sapablursen by (subcutaneous) SC injection once every four weeks up to Week 105. After the protocol Amendment 2 the dose was increased to a maximum of 160 mg once every 4 weeks.
Drug: sapablursen
sapablursen administered subcutaneously
Other Names:
  • ISIS 702843
  • IONIS TMPRSS6-LRx
Experimental: Cohort B: Sapablursen
Subjects initially received 50 mg/0.5 mL of sapablursen by SC injection once every four weeks up to Week 105. After the protocol Amendment 2 the dose was increased to a maximum of 160 mg once every 4 weeks
Drug: sapablursen
sapablursen administered subcutaneously
Other Names:
  • ISIS 702843
  • IONIS TMPRSS6-LRx
Experimental: Cohort C: Sapablursen
Subjects initially received 80 mg/0.8 mL of sapablursen by SC injection once every four weeks up to Week 105. After the protocol Amendment 2 the dose was increased to a maximum of 160 mg once every 4 weeks.
Drug: sapablursen
sapablursen administered subcutaneously
Other Names:
  • ISIS 702843
  • IONIS TMPRSS6-LRx

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 of Participants With a ≥1.0 Grams Per Deciliter (g/dL) Increase From Baseline in Hemoglobin (Hb) at Week 27
Time Frame: Baseline and Week 27
Blood hemoglobin
Baseline and Week 27

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 With a ≥1.5 g/dL Increase From Baseline in Hb at Week 53
Time Frame: Week 53
Blood hemoglobin
Week 53
Percentage of Participants With a ≥1.0 Milligrams of Iron Per Grams of Dry Weight of Liver (mg Fe/g) Decrease From Baseline in Liver Iron Concentration (LIC) at Week 53
Time Frame: Week 53
Liver iron content
Week 53

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.

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.
September 24, 2020

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.
March 28, 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.
March 28, 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).
August 14, 2019

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 14, 2019

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 16, 2019

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 14, 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 702843-CS2
  • 2019-003505-96 (EudraCT Number)

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

Yes

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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