An Extension Study to Assess Long-Term Safety of Eplontersen in Adults With Transthyretin-Mediated Amyloid Cardiomyopathy (ATTR-CM)

Ionis Pharmaceuticals

Status and phase: Invitation-only; Phase 3

Conditions: Transthyretin-Mediated Amyloid Cardiomyopathy (ATTR CM)

Treatments: Drug: Eplontersen

Study type: Interventional

Funder types: Industry

Identifiers

NCT05667493

2022-000826-74 (EudraCT Number)

ION-682884-CS12

Details and patient eligibility

About

The purpose of this study is to evaluate the safety and tolerability of extended dosing with eplontersen in participants with ATTR-CM.

Full description

This is a multicenter, open-label extension, Phase 3 study in up to approximately 1400 participants from the 682884-CS2 study. Eligible participants will receive eplontersen once every 4 weeks for up to 36 months or until after eplontersen is approved and available in the site's country, whichever occurs first. Participants will also receive daily supplemental doses of the recommended daily allowance (RDA) of vitamin A.

Enrollment: 1,400 estimated patients

Sex: All

Ages: 18+ years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. Satisfactory completion of Treatment Period and the End of Treatment Visit of the Index Study (ION-682884-CS2) OR diagnosis of ATTR-CM and satisfactory participation on ISIS 420915- CS101 study as judged by the Investigator and Sponsor.
2. Investigator is willing to treat the participant with open-label eplontersen.
3. Willingness to adhere to vitamin A supplementation per protocol.

Exclusion criteria

1. Permanently discontinued study drug administration while participating in the Index Study (ION 682884-CS2) or IST (ISIS 420915-CS101 Study).
2. Have any new condition or worsening of an existing condition that in the opinion of the Investigator or Sponsor would make the participant unsuitable for enrolment, or which could interfere with the participant participating in or completing the study, including the need for treatment with medications disallowed in the Index Study.

Trial design

Primary purpose: Treatment

Allocation: N/A

Interventional model: Single Group Assignment

Masking: None (Open label)

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1,400 participants in 1 patient group

Eplontersen

Experimental group

Description:

Eplontersen will be administered once every month by sub-cutaneous (SC) injection for up to 36 months or 6 months after eplontersen is approved and available in the site's country, whichever occurs first.

Treatment:

Drug: Eplontersen