J-LINX: Japan LINerixibat eXtension Study

September 30, 2026 updated by: GlaxoSmithKline

Japan Open-Label Linerixibat Safety and Tolerability Extension Study for Cholestatic Pruritus in PBC

This study evaluates the long-term safety and tolerability of linerixibat in Japanese adults with cholestatic pruritus in primary biliary cholangitis (PBC) who previously participated in the linerixibat long-term safety and efficacy study, LLSAT (NCT04167358). Participants will continue receiving linerixibat while researchers monitor adverse events and other safety measures to better understand the long-term safety of treatment and provide continued access to therapy.

Study Overview

Status

Not yet recruiting

Conditions

Intervention / Treatment

Study Type

Interventional

Enrollment (Estimated)

40

Phase

  • Phase 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact Backup

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

18 years to 80 years (Adult, Older Adult)

Accepts Healthy Volunteers

No

Genders Eligible for Study

All

Description

Inclusion Criteria:

  • Participants with a diagnosis of PBC and a history of associated pruritus as evidenced by randomization into an eligible linerixibat clinical study prior to LLSAT (GLIMMER or GLISTEN)

  • Participants must have completed the main treatment period in LLSAT

  • A Female participant is eligible to participate if she is not pregnant or breastfeeding and one of the following applies:

    • Is a woman of non-childbearing potential (WONCBP), OR
    • Is a woman of childbearing potential (WOCBP) and using an acceptable contraceptive method during the study intervention period (at a minimum until 4 weeks after the last dose of study intervention). The investigator should evaluate the potential for contraceptive method failure (e.g., noncompliance, recently initiated in relationship to the first dose of study intervention, etc.)

  • WOCBP must have a negative highly sensitive urine pregnancy test (or serum, as required by local regulations) within 7 days before the baseline visit

    • If a urine test cannot be confirmed as negative (e.g., an ambiguous result), a serum pregnancy test is required. In such cases, the participant must be excluded from participation if the serum pregnancy result is positive

  • Capable of giving signed informed consent

Exclusion Criteria:

  • Participants who met LLSAT protocol-defined Liver Monitoring or Liver Stopping criteria and who remain off study treatment or where Liver Event is not resolved at the Final Visit in LLSAT
  • Presence of hepatic decompensation (e.g., current and unresolved variceal bleeding, encephalopathy, or ascites)
  • Presence of confirmed hepatocellular carcinoma or biliary cancer
  • Current clinically significant diarrhea in the investigator's medical opinion
  • Any current medical condition (e.g., psychiatric disorder, senility, or dementia) which, in the investigator's opinion, may affect the participant's ability to comply with protocol-specified procedures
  • Current enrollment or participation in any other clinical study (except for LLSAT) involving an investigational study treatment within 8 weeks prior to the Screening Visit
  • Corrected QT Interval (QTc) >480 milliseconds (msec) at screening (12-lead Electrocardiogram [ECG]), subject to rescreening

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

  • Primary Purpose: Treatment
  • Allocation: N/A
  • Interventional Model: Single Group Assignment
  • Masking: None (Open Label)

Arms and Interventions

Participant Group / Arm
Intervention / Treatment
Experimental: Linerixibat

Participants with cholestatic pruritus associated with primary biliary cholangitis (PBC) who completed the LLSAT study will receive linerixibat.
Drug: Linerixibat

Linerixibat will be administered.

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Time Frame
Number of Participants With Adverse Events (AEs) and Serious AEs (SAEs)
Time Frame: Up to approximately 18 months (End of study)
Up to approximately 18 months (End of study)
Number of Participants With AEs by Severity
Time Frame: Up to approximately 18 months (End of study)
Up to approximately 18 months (End of study)

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

GlaxoSmithKline

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

October 9, 2026

Primary Completion (Estimated)

October 23, 2028

Study Completion (Estimated)

October 23, 2028

Study Registration Dates

First Submitted

September 30, 2026

First Submitted That Met QC Criteria

September 30, 2026

First Posted (Actual)

October 6, 2026

Study Record Updates

Last Update Posted (Actual)

October 6, 2026

Last Update Submitted That Met QC Criteria

September 30, 2026

Last Verified

September 1, 2026

More Information

Terms related to this study

Keywords

Additional Relevant MeSH Terms

Other Study ID Numbers

  • 309859

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

Study Sponsor will assess requests from qualified researchers for anonymized individual patient-level data and related study documents. Data sharing is subject to certain criteria, conditions, and exceptions. For further information, refer to https://www.gsk-studyregister.com/gsk-patient-level-data-sharing-july2025.pdf

IPD Sharing Time Frame

Anonymized IPD will be made available within 6 months of publication of primary, key secondary and safety results for studies in product with approved indication(s) or asset(s) with development terminated across all indications.

IPD Sharing Access Criteria

Anonymized IPD is shared with researchers whose proposals are approved by an Independent Review Panel and after a Data Sharing Agreement is in place. Access is provided for an initial period of 12 months, but an extension may be granted, when justified, for up to 6 months.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ICF
  • CSR

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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