๐Ÿ›๏ธ Verified NIH Record โ€ข Updated 2026-08-11

A Study to Evaluate ALN-6400 in Healthy Volunteers and Patients With Hereditary Hemorrhagic Telangiectasia (HHT) (NCT06659640)

InsigHHT: A Phase 1/2, Randomized, Double-blind, Placebo-controlled, 2-part Study of the Safety, Tolerability, Efficacy, Pharmacokinetics, and Pharmacodynamics of Single Dose ALN-6400 in Adult Healthy Volunteers and Multiple Dose ALN-6400 in Adult Patients With Hereditary Hemorrhagic Telangiectasia (HHT)

๐Ÿ”ต Active, Not Recruiting Phase1 / Phase2 ๐Ÿ’Š Investigational Drug / Biologic Sponsor: Alnylam Pharmaceuticals

๐Ÿฉบ Plain-English Summary (8th-Grade Level)

The purpose of this study is to: * evaluate the safety, tolerability, pharmacokinetics (PK) and pharmacodynamics (PD) of single ascending doses of ALN-6400 in healthy volunteers * evaluate the efficacy, safety, tolerability and PD of multiple doses of ALN-6400 in adult patients with HHT

Who can join: Review the eligibility criteria below.

Location: Clinical Trial Site โ€” Birmingham, Alabama

Age range: 18 Years

๐Ÿงช Interventions in This Study

๐Ÿ“‹ "Do I Qualify?" โ€” 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria โ†—

๐Ÿ“ All Participating Trial Locations (16 Sites)

  • Clinical Trial Site โ€” Birmingham, Alabama
  • Clinical Trial Site โ€” Cypress, California
  • Clinical Trial Site โ€” Gainesville, Florida
  • Clinical Trial Site โ€” Indianapolis, Indiana
  • Clinical Trial Site โ€” Boston, Massachusetts
  • Clinical Trial Site โ€” Rochester, Minnesota
  • Clinical Trial Site โ€” St Louis, Missouri
  • Clinical Trial Site โ€” Chapel Hill, North Carolina
  • Clinical Trial Site โ€” Camperdown,
  • Clinical Trial Site โ€” Parkville,
  • Clinical Trial Site โ€” Mount Royal,
  • Clinical Trial Site โ€” Toronto,
  • Clinical Trial Site โ€” Bordeaux,
  • Clinical Trial Site โ€” Bron,
  • Clinical Trial Site โ€” Homburg,
  • Clinical Trial Site โ€” L'Hospitalet de Llobregat,

๐Ÿ’ฐ Cost, Insurance & Patient Rights

  • 100% Free Items: The investigational treatment and protocol-required procedures are supplied at zero cost by the sponsor.
  • Routine Patient Care: Under federal law (ACA ยง 2709) and many state statutes, routine care costs are covered during participation.
  • Voluntary Participation: You may withdraw at any time without affecting your standard medical care.

๐Ÿ’ก How to Participate

  1. Check the checklist above to see if you may qualify.
  2. Review the official NIH record below to find the coordinating site.
  3. Ask about the visit schedule, what is covered at no cost, and any travel support.
  4. Confirm with your own doctor before making a decision.
๐Ÿ›๏ธ View Official NIH Record โ†—