🏛️ Verified NIH Record • Updated 2026-06-22

Long-term Follow-up Study to Evaluate Durability of Treatment Response in Previous Bepirovirsen Study Participants (B-Sure) (NCT04954859)

A Prospective, Multi-Centre Study (B-Sure) to Evaluate Long-Term Durability of Treatment Response in Chronic Hepatitis B Participants With and Without Nucleos(t)Ide Therapy Who Have Participated in a Previous Bepirovirsen Treatment Study

🔵 Active, Not Recruiting Phase2 💊 Investigational Drug / Biologic Sponsor: GlaxoSmithKline

🩺 Plain-English Summary (8th-Grade Level)

This is a global multi-center, long-term follow-up study to assess durability of efficacy, as measured by maintenance of treatment response from the parent study, in participants who participated in a previous bepirovirsen study and achieved a complete or partial response. Eligible participants will be enrolled in this study after completing the end of study (EoS) visit in the respective parent bepirovirsen studies (studies B-Clear \[209668: NCT04449029\], B-Together \[209348: NCT04676724\], B-Fine \[212602: NCT04544956\], B-Well 1 \[202009: NCT05630807\], B-Well 2 \[219288: NCT05630820\], and TH HBV ASO-001 \[217023: NCT05276297\]). Participants will be categorized as Not-on-NA, NA-cessated, or On-NA based on their nucleos(t)ide analogue (NA) status in the parent study. No further treatment with bepirovirsen will be administered in this study.

Who can join: Review the eligibility criteria below.

Location: GSK Investigational Site — Sacramento, California

Age range: 18 Years

🧪 Interventions in This Study

📋 "Do I Qualify?" — 1-Minute Self Screener

Instant Checklist

Full eligibility criteria are available on the official NIH protocol. View the criteria ↗

📍 All Participating Trial Locations (163 Sites)

Showing the first 25 of 163 sites.

  • GSK Investigational Site — Sacramento, California
  • GSK Investigational Site — San Jose, California
  • GSK Investigational Site — Colorado Springs, Colorado
  • GSK Investigational Site — Boston, Massachusetts
  • GSK Investigational Site — Detroit, Michigan
  • GSK Investigational Site — La Plata, Buenos Aires
  • GSK Investigational Site — Buenos Aires,
  • GSK Investigational Site — Buenos Aires,
  • GSK Investigational Site — Rosario,
  • GSK Investigational Site — Santa Fe,
  • GSK Investigational Site — Herston, Queensland
  • GSK Investigational Site — Fitzroy, Victoria
  • GSK Investigational Site — Aracaju, Sergipe
  • GSK Investigational Site — Campinas,
  • GSK Investigational Site — Curitiba,
  • GSK Investigational Site — Manaus,
  • GSK Investigational Site — São Paulo,
  • GSK Investigational Site — Vila Mariana,
  • GSK Investigational Site — Plovdiv,
  • GSK Investigational Site — Sliven,
  • GSK Investigational Site — Sofia,
  • GSK Investigational Site — Sofia,
  • GSK Investigational Site — Sofia,
  • GSK Investigational Site — Varna,
  • GSK Investigational Site — Calgary, Alberta

💰 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 § 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.

Explore by condition: All Hepatitis B clinical trials

💡 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.
🏛️ View Official NIH Record ↗