Acoramidis Transthyretin Amyloidosis Prevention Trial in the Young (ACT-EARLY) Study in Asymptomatic Carriers of a Pathogenic TTR Variant

Summary

Transthyretin amyloidosis (ATTR) is a disease where the normally occurring transthyretin (TTR) protein falls apart and forms amyloid, a sticky plaque-like substance that accumulates in different organs in the body and can cause damage to the organ. There are two ways that the TTR protein can fall apart. One way occurs as a person ages, where the normal TTR protein can fall apart and form amyloid that may no longer be sufficiently cleared by the body. This type of ATTR is known as wild-type ATTR (ATTRwt). The other way occurs when a person inherits a defective TTR gene that causes the TTR protein to spontaneously fall apart. This form of the disease is known as variant ATTR (ATTRv) and can be detected in adults by a genetic test of their TTR gene before they age.

Amyloid build-up in the heart causes the heart wall to become thick and stiff and can result in heart failure and even death. Accumulation of TTR amyloid in the heart is known as transthyretin amyloid cardiomyopathy or ATTR-CM. Amyloid can also deposit in the nerve tissues leading to nerve problems. Accumulation of TTR in the nerves is known as transthyretin amyloid polyneuropathy or ATTR-PN.

Acoramidis is an experimental drug designed to bind tightly to TTR in the blood and stabilize its structure, so it does not form the harmful amyloid plaques that can cause damage to organs.

This study is intended to determine if treatment with acoramidis in participants with ATTRv who have not yet developed any symptoms of disease can prevent or delay the development of ATTR-CM or ATTR-PN disease. If adults with an inherited defective TTR gene are treated early before any of the symptoms of disease have developed, it may be possible to delay the onset or prevent the disease entirely.

Conditions

• Amyloidosis
• Amyloid Cardiomyopathy
• Transthyretin Amyloidosis
• Cardiomyopathies
• Heart Diseases
• Polyneuropathies

Interventions

DRUG

Acoramidis

TTR stabilizer administered orally twice daily (BID)

DRUG

Placebo oral tablet

Non-active control administered orally twice daily (BID)

Sponsors & Collaborators

• Eidos Therapeutics, a BridgeBio company

  lead INDUSTRY

Study Design

Allocation

RANDOMIZED

Purpose

PREVENTION

Masking

QUADRUPLE

Model

PARALLEL

Eligibility

Min Age

18 Years

Max Age

75 Years

Sex

ALL

Healthy Volunteers

No

Timeline & Regulatory

Start

2025-05-12

Primary Completion

2031-10-31

Completion

2032-12-31

FDA Drug

Yes

Countries

• United States
• Argentina
• Australia
• Belgium
• Brazil
• Canada
• Denmark
• France
• Germany
• Greece
• Ireland
• Italy
• Japan
• Malaysia
• Martinique
• Mexico
• Netherlands
• Portugal
• Singapore
• South Korea
• Spain
• Sweden
• Taiwan
• United Kingdom

Study Locations