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RecruitingPHASE3INTERVENTIONAL

TRITON-PN: A Study to Evaluate the Efficacy and Safety of Nucresiran in Patients With Hereditary Transthyretin Amyloidosis With Polyneuropathy

This research study, called TRITON-PN, is looking into a new medicine named Nucresiran for people who have a condition called hereditary transthyretin amyloidosis (hATTR) that causes nerve damage, known as polyneuropathy. The main goals are to understand how safe Nucresiran is and how well it works. Researchers want to see if it can help improve nerve issues, overall quality of life, how well people can move around, and their general health. They will compare Nucresiran to another existing treatment, Vutrisiran, by checking the levels of a specific protein (transthyretin) in the blood. This is a Phase 3 study, meaning it's one of the final stages of testing before a medicine could potentially be made widely available.

At a glance

Status
Recruiting
Phase
PHASE3
Sponsor
Alnylam Pharmaceuticals
Enrolment target
125
Start
03 Feb 2026
Estimated completion
12 Jun 2031

What is this study about?

This study is for people living with a rare inherited condition called hereditary transthyretin amyloidosis, or hATTR for short. In hATTR, a protein called transthyretin (TTR) doesn't fold correctly and builds up in different parts of the body, including the nerves. When it affects the nerves, it's called polyneuropathy, which can lead to problems like numbness, tingling, weakness, and pain.

The main purpose of this study is to find out if a new medicine, Nucresiran, is safe and effective in treating people with hATTR and nerve damage. Researchers will be looking at several things to judge its effectiveness. They will check if it helps improve nerve function, how it impacts your daily life and overall well-being, and if it makes a difference to your ability to move and walk. They will also compare Nucresiran to another medicine, Vutrisiran, that is currently used to treat this condition, specifically by looking at how much of the faulty TTR protein is in the blood.

Taking part in a study like this helps doctors learn more about new treatments. If Nucresiran proves to be safe and helpful, it could become another option for people living with hATTR polyneuropathy in the future. The study is for adults aged 18 to 85, and both men and women can participate.

Key takeaways

  • This study is testing a new medicine, Nucresiran, for hATTR polyneuropathy.
  • It aims to see if Nucresiran can improve nerve problems and quality of life.
  • The study will compare Nucresiran with an existing treatment, Vutrisiran.
  • Participation involves regular clinic visits and health checks.
  • You can discuss if this study is right for you with your doctor.

Who may be eligible?

To join this study, you would need to have been officially diagnosed with hATTR that causes nerve damage (polyneuropathy) and have a specific change in your TTR gene. Your nerve problems should be within a certain range of severity, and you should generally be able to manage your daily activities.

There are also some reasons why you might not be able to join. For example, if you've had a liver transplant or are likely to need one soon, you wouldn't be eligible. The study also can't include people who have other types of amyloidosis, severe heart failure, or certain problems with their liver or kidneys. If you have other known causes for nerve problems that aren't related to hATTR, you also wouldn't be able to take part.

These rules are in place to help make sure the study is safe for everyone involved and that the results are clear and accurate. Your study doctor would carefully check all these points with you.

Could this study suit you?

Answer these quick questions to see if you may be eligible. This is a guide only — the research team makes the final call.

  1. I have been diagnosed with hATTR that causes nerve problems.
  2. My nerve problems are not too mild or too severe.
  3. I am generally able to carry out my daily activities.
  4. I haven't had a liver transplant.
  5. I don't have other serious heart, liver, or kidney conditions.
Answer every question to see your result.

What does participation involve?

If you decide to take part in this study, you will be given one of the study medicines, either Nucresiran or Vutrisiran. You will need to attend regular visits to the study clinic over a period of time. These visits will involve various assessments to check your health and how the medicine is affecting you. This might include physical exams, blood tests, urine tests, checks of your nerve function, and questions about your quality of life and how you're feeling. You'll be closely monitored by the study team throughout. The total duration of your participation in the study, including follow-up, would be fully explained to you before you agree to join.

Potential risks and benefits

Participating in this study might offer potential benefits, such as receiving a new investigational treatment for hATTR polyneuropathy and close monitoring of your health by medical professionals. However, there are also potential risks involved, as with any new medicine. Nucresiran is still being tested, so its full effects, including side effects, are not yet completely known. You might experience side effects from the study medicine, or it might not help your condition. You would be fully informed of all known risks before joining. It is very important to remember that joining a clinical study is always voluntary, and you have the right to withdraw at any time, for any reason, without it affecting your usual medical care.

Locations (56)

  • Clinical Trial Site
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    Aurora, United States· Recruiting
  • Clinical Trial Site
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    Chicago, United States· Recruiting
  • Clinical Trial Site
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    Baltimore, United States· Recruiting
  • Clinical Trial Site
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    Boston, United States· Recruiting
  • Clinical Trial Site
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    Rochester, United States· Recruiting
  • Clinical Trial Site
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    New York, United States· Recruiting
  • Clinical Trial Site
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    New York, United States· Recruiting
  • Clinical Trial Site
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    Chapel Hill, United States· Recruiting
  • Clinical Trial Site
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    Nashville, United States· Recruiting
  • Clinical Trial Site
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    Dallas, United States· Recruiting
  • Clinical Trial Site
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    Houston, United States· Recruiting
  • Clinical Trial Site
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    Rosario, Argentina· Recruiting

Common questions

What is hATTR polyneuropathy?

It's a rare inherited condition where a protein builds up in the nerves, causing symptoms like numbness, tingling, weakness, and pain.

What is Nucresiran?

Nucresiran is a new medicine being tested in this study to see if it can help people with hATTR nerve damage.

Who can take part?

Adults aged 18 to 85 with a confirmed diagnosis of hATTR polyneuropathy, who meet specific health requirements.

Will I get a new medicine?

Yes, you will receive either the new medicine Nucresiran or an existing medicine called Vutrisiran, as part of the study.

Can I leave the study at any time?

Yes, you are free to withdraw from the study at any point, and it won't affect your ongoing medical care.

How to find out more

Clinical Trial Information Line

Always speak to your GP or specialist before deciding to take part in a study.

Interested in taking part?

Register your interest

Share your details and the research team for "TRITON-PN: A Study to Evaluate the Efficacy and Safety of Nu…" will contact you if you may be eligible. Always speak to your GP before agreeing to take part.

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