Nucresiran versus vutrisiran for hereditary transthyretin polyneuropathy
Official title: TRITON-PN: A Phase 3, Global, Randomized, Open-Label Study to Evaluate the Efficacy and Safety of Nucresiran in Patients With Hereditary Transthyretin-Mediated Amyloidosis With Polyneuropathy (hATTR-PN)
Run by Alnylam Pharmaceuticals · NCT07223203 · Data updated 2026-11-12
This trial tests whether nucresiran helps people with hereditary transthyretin-mediated amyloidosis with polyneuropathy by improving nerve function, symptoms, and quality of life and whether it lowers blood TTR more than vutrisiran.
Quick facts
| Phase | Phase 3 |
|---|---|
| Study type | Interventional |
| Ages | 18 Years to 85 Years |
| Sex | All |
| Enrollment | 125 (estimated) |
| Sponsor | Alnylam Pharmaceuticals Industry-sponsored |
| Locations | 61 sites (Aurora, Colorado and 60 other locations) |
| Status | Recruiting |
| Started | February 3, 2026 |
| Main results expected | December 27, 2027 |
| Study ends | June 12, 2031 |
| Registry record updated | October 8, 2026 |
| Trial ID | NCT07223203 on ClinicalTrials.gov |
Is this trial a fit for you?
✓Likely a good fit
Ideal candidates are adults with genetically confirmed hereditary transthyretin amyloidosis with polyneuropathy, NIS 5–130, KPS ≥60%, and acceptable liver, kidney, and cardiac status who can attend a study site.
✕Probably not a fit
Patients with non-hATTR amyloidosis, leptomeningeal involvement, NYHA class >2 heart failure, severe liver or renal dysfunction, prior or planned liver transplant, or other causes of neuropathy are unlikely to benefit from this trial.
A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.
What this trial studies
This Phase 3, head-to-head interventional trial compares the RNAi therapeutic nucresiran to vutrisiran in adults with genetically confirmed hATTR-PN. Eligible participants have a documented TTR gene variant, a neuropathy impairment score (NIS) between 5 and 130, and a Karnofsky Performance Status of at least 60%. Participants receive assigned treatment and are followed for changes in neurologic impairment, quality of life, nutritional status, disability, and gait speed as well as serum transthyretin levels. The study excludes people with prior or planned liver transplant, non-hATTR forms of amyloidosis, significant heart failure, marked liver enzyme or bilirubin elevation, severe renal impairment, or other known causes of neuropathy.
Why it matters
Potential benefit: If successful, nucresiran could reduce TTR levels and slow or improve neuropathy symptoms and related disability for people with hATTR-PN.
How similar studies have gone: Other RNAi therapies for hATTR-PN such as patisiran and vutrisiran have shown clinical benefit, so the RNAi approach is established, but nucresiran's superiority is unproven.
Who can join: the full rules
Show full inclusion / exclusion criteria
Inclusion Criteria: * Has documented diagnosis of hATTR-PN * Has a diagnosis of hATTR amyloidosis with polyneuropathy with a documented TTR gene variant * Has a neuropathy impairment score (NIS) of 5 to 130 (inclusive) * Has a Karnofsky Performance Status (KPS) of ≥60% Exclusion Criteria: * Has had a liver transplant or is likely, in the opinion of the Investigator, to undergo liver transplantation during the Treatment Period of the study * Has known other (non-hATTR) forms of amyloidosis or clinical evidence of leptomeningeal amyloidosis * Has a New York Heart Association (NYHA) heart failure classification \>2 * Has alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>2.5 upper limit of normal (ULN) * Has total bilirubin \>1.5 ULN * Has estimated glomerular filtration rate (eGFR) ≤30 mL/min/1.73m\^2 * Has other known causes of sensorimotor or autonomic neuropathy
Where it's running
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Aurora, Colorado, United States Recruiting -
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Chicago, Illinois, United States Recruiting -
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Boston, Massachusetts, United States Recruiting -
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Rochester, Minnesota, United States Recruiting -
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New York, New York, United States Recruiting
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Guadalajara, Mexico Recruiting -
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Huelva, Spain Recruiting -
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L'Hospitalet de Llobregat, Spain Recruiting
+11 more sites. See ClinicalTrials.gov for the full list.
Study contacts
- Study coordinator: Clinical Trial Information Line
- Email: clinicaltrials@alnylam.com
- Phone: 1-877-ALNYLAM
Similar studies
Other studies for the same condition or treatment. Recruiting studies are listed first.
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Monitoring pregnancy outcomes in women exposed to patisiran-LNP
This study is looking to see how patisiran-LNP affects pregnancy and baby outcomes in women who have been treated with it.
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Long-term safety of eplontersen in adults with transthyretin amyloidosis, including those with prior liver transplant or severe liver impairment
This study will see if eplontersen remains safe over time for adults with transthyretin amyloidosis, including people who have had a liver transplant or have severe liver problems.
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Observational study of patients with ATTR amyloidosis
This study looks at the characteristics of people with ATTR amyloidosis and tests how well existing treatments work for them in real life.
How to take part
- Review the eligibility criteria above with your treating physician.
- Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
- Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.