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NCT03759379CompletedPhase 3

HELIOS-A: A Study of Vutrisiran (ALN-TTRSC02) in Patients With Hereditary Transthyretin Amyloidosis (hATTR Amyloidosis)

HELIOS-A: A Phase 3 Global, Randomized, Open-label Study to Evaluate the Efficacy and Safety of ALN-TTRSC02 in Patients With Hereditary Transthyretin Amyloidosis (hATTR Amyloidosis)

Source: ClinicalTrials.gov · Last updated 12 Jan 2026

Brief summary (registry, in English)

The purpose of this study is to evaluate the efficacy and safety of vutrisiran (ALN-TTRSC02) in participants with hereditary transthyretin amyloidosis (hATTR amyloidosis). Participants will receive vutrisiran subcutaneous (SC) injection once every 3 months (q3M) or the reference comparator patisiran intravenous (IV) injection once every 3 weeks (q3w) during the 18 month Treatment Period. This study will use the placebo arm of the APOLLO study (NCT01960348) as an external comparator for the primary and most other efficacy endpoints during the 18 Month Treatment Period. Following the 18 Month Treatment Period, all participants will be randomized to receive vutrisiran 50 mg SC injection once every 6 months (q6M) or vutrisiran 25 mg q3M in the Randomized Treatment Extension (RTE) Period. Upon implementation of Amendment 6, participants receiving vutrisiran SC 50 mg q6M will transition to vutrisiran SC 25 mg q3M at their next scheduled dosing.

Status (registry)
Completed
Phase (registry)
Phase 3
Study type
Interventional
Enrollment
164 (actual)
First submitted
28 Nov 2018
Start date
14 Feb 2019
Primary completion date
10 Nov 2020
Lead sponsor
Alnylam Pharmaceuticals
Diseases
Amyloidosis
NCT number
NCT03759379
EU CT number
2023-508365-33-00
EudraCT number
2018-002098-23

What you commit to

  • Study type: Interventional · Phase 3
  • Participants enrolled: 164
  • From 14 Feb 2019 to the primary completion date, 10 Nov 2020
  • 60 sites in 22 countries
  • Visits and tests: ask the trial team, the registry does not list them

Built from the registry fields of ClinicalTrials.gov. It describes the study, not your situation.

Who cannot take part

Copied verbatim from ClinicalTrials.gov and grouped by topic. Only the trial team decides who can take part.

Prior treatment

  • Had a prior liver transplant or is likely to undergo liver transplantation during the study;
  • Received an experimental drug within 30 days of dosing;
  • Received prior TTR-lowering treatment;

Other illness

  • Has New York Heart Association heart failure classification \>2;
  • Has known human immunodeficiency virus (HIV), hepatitis C virus (HCV) or hepatitis B virus (HBV) infection;

Other

  • Has known other (non-hATTR) forms of amyloidosis or leptomeningeal amyloidosis;
  • Clinically significant liver function test abnormalities;
  • Has other known causes of neuropathy.

Who the study is looking for

  • Male or female of 18 to 85 years of age (inclusive);
  • Has a diagnosis of hATTR amyloidosis with transthyretin (TTR) mutation;
  • Has adequate neurologic impairment score (NIS);
  • Has adequate polyneuropathy disability (PND) score;
  • Has adequate Karnofsky Performance Status (KPS).

Age in the registry: 18 years to 85 years · Sex: All · Does not accept healthy volunteers

Full criteria on ClinicalTrials.gov

Sites (60)

Sites in registry order. Pick your city on the disease page to sort them by distance.

SiteCityCountrySite status
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Buenos AiresArgentinaUnknown status
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BrisbaneAustraliaUnknown status
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MelbourneAustraliaUnknown status
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NorthmeadAustraliaUnknown status
UZ Leuven
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LeuvenBelgiumCompleted
Alexandrovska University Hospital
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SofiaBulgariaCompleted
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Rio de JaneiroBrazilUnknown status
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MontrealCanadaUnknown status
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VancouverCanadaUnknown status
The Cyprus Foundation For Muscular Dystrophy Research
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Agios DometiosCyprusCompleted
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HeidelbergGermanyUnknown status
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MainzGermanyUnknown status
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MünsterGermanyUnknown status
Hospital Universitari Vall d'Hebron
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BarcelonaSpainCompleted
Hospital Universitario Juan Ramon Jimenez
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HuelvaSpainCompleted
Bellvitge University Hospital
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L'hospitalet De LlobregatSpainCompleted
Hospital Clínico San Carlos
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MadridSpainCompleted
Hospital Universitario Puerta de Hierro de Majadahonda
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MajadahondaSpainCompleted
Hospital Universitario Y Politecnico La Fe
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ValenciaSpainCompleted
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BordeauxFranceUnknown status
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CréteilFranceUnknown status
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Le Kremlin-BicêtreFranceUnknown status
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LilleFranceUnknown status
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MarseilleFranceUnknown status
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NantesFranceUnknown status
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LondonUnited KingdomUnknown status
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AthensGreeceUnknown status
IRCCS Foundation Istituto Neurologico Carlo Besta
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MilanItalyCompleted
Fondazione IRCCS Policlinico San Matteo
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PaviaItalyCompleted
Fondazione Policlinico Universitario Agostino Gemelli IRCCS
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RomeItalyCompleted
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KumamotoJapanUnknown status
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NaganoJapanUnknown status
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NagoyaJapanUnknown status
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OsakaJapanUnknown status
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DaeguSouth KoreaUnknown status
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SeoulSouth KoreaUnknown status
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Mexico CityMexicoUnknown status
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Kuala LumpurMalaysiaUnknown status
Universitair Medisch Centrum Groningen
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GroningenNetherlandsCompleted
Hospital De Santa Maria E.P.E.
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LisbonPortugalCompleted
Unidade Local De Saude De Santo Antonio E.P.E.
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PortoPortugalCompleted
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SolnaSwedenUnknown status
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UmeåSwedenUnknown status
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TaipeiTaiwanUnknown status
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Taoyuan CityTaiwanUnknown status
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AuroraUnited StatesUnknown status
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BaltimoreUnited StatesUnknown status
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BostonUnited StatesUnknown status
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Chapel HillUnited StatesUnknown status
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ChicagoUnited StatesUnknown status
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ColumbusUnited StatesUnknown status
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DallasUnited StatesUnknown status
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FairwayUnited StatesUnknown status
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JacksonvilleUnited StatesUnknown status
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La MesaUnited StatesUnknown status
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New YorkUnited StatesUnknown status
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PhiladelphiaUnited StatesUnknown status
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PortlandUnited StatesUnknown status
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RochesterUnited StatesUnknown status
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St LouisUnited StatesUnknown status

This page is information, not medical advice. Discuss any trial with your doctor.