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NCT Number: NCT07841977

Study of Seladelpar and Cilofexor in Participants With Primary Biliary Cholangitis

The goal of this clinical study is to learn more about the combination of study drugs seladelpar and cilofexor. The study will assess, the safety, tolerability, and effectiveness of the combination drugs versus both seladelpar alone and placebo, in participants with primary biliary cholangitis (PBC).

The primary objective of this study is to determine whether the combination of seladelpar + cilofexor leads to greater alkaline phosphatase (ALP) reduction than seladelpar alone and describe the safety and tolerability of seladelpar + cilofexor.

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Key information

Who can participate

Healthy volunteers accepted: No

Only the study team can determine whether someone qualifies for participation.

Key Inclusion Criteria:

  • Have a diagnosis of PBC as defined by a history of any 2 of the following criteria:
  • ALP above 1.0 × the ULN for at least 6 months
  • Positive antimitochondrial antibody titer (> 1:40 on immunofluorescence or M2 positive by enzyme-linked immunosorbent assay) or positive PBC-specific antinuclear antibodies
  • Documented liver biopsy results consistent with PBC
  • Used ursodeoxycholic acid (UDCA) for the past 12 months (stable dose for > 6 months prior to screening), or intolerant to UDCA (last dose of UDCA > 90 days prior to screening)
  • Have an ALP ≥ 1.67 × ULN at screening
  • Have a negative serum pregnancy test at screening

Key Exclusion Criteria:

  • Have other causes of liver disease including viral, alcoholic, autoimmune, and metabolic associated steatohepatitis (MASH).
  • Cirrhosis with Child-Pugh Score ≥ 7, corresponding to Class B or C. Individuals with compensated cirrhosis (ie, Child-Pugh Class A) are allowed if they meet all other criteria.
  • Have evidence of portal hypertension or clinically important hepatic decompensation (historic or current), including but not limited to: hepatic encephalopathy, known esophageal or gastric varices, history of liver transplantation, current placement on liver transplant list, Model for End Stage Liver Disease score ≥ 12, ascites, spontaneous bacterial peritonitis, hepatorenal syndrome.
  • Have previous exposure to seladelpar or cilofexor
  • Used obeticholic acid, fenofibrate, bezafibrate, elafibranor, pemafibrate, or saroglitazar within 6 weeks (42 days, inclusive) of screening date
  • Require or expect to require treatment with ≥ 5 mg prednisone (or systemic equivalents) for > 2 weeks during the Blinded Treatment or ATE Periods
  • Are on any systemic drug for antipruritic treatment that has required a dose adjustment in the 30 days before screening, or initiated a systemic antipruritic drug in the 30 days before screening

Note: Other protocol defined Inclusion/Exclusion criteria may apply.

Treatment and study plan

Seladelpar

Drug

Capsule administered orally

PTM Seladelpar

Drug

Capsule administered orally

Cilofexor Dose B

Drug

Tablet administered orally

PTM Cilofexor Dose A

Drug

Tablet administered orally

PTM Cilofexor Dose B

Drug

Tablet administered orally

Cilofexor Dose A

Drug

Tablet administered orally

Primary outcomes

  1. Change From Baseline in Serum Concentration of Alkaline Phosphate (ALP) at Week 24

    Time frame: Baseline, Week 24

  2. Percentage of Participants Experiencing Treatment-Emergent Adverse Events (TEAEs)

    Time frame: First dose up to 30 days post last dose (up to 318 weeks)

  3. Percentage of Participants Experiencing Serious Adverse Events (SAEs)

    Time frame: First dose up to 30 days post last dose (up to 318 weeks)

Secondary outcomes

  1. Proportion of Participants Achieving the Biochemistry Composite Endpoint at Week 24

    Time frame: Week 24

    Defined as the percentage of participants with ALP < 1.67 × upper limit of normal (ULN), ALP decrease of ≥ 15%, and total bilirubin ≤ 1 × ULN.

  2. Proportion of Participants Achieving ALP Normalization at Week 24

    Time frame: Week 24

    ALP Normalization is defined as ALP ≤ 1.0 × ULN.

  3. Change From Baseline to Week 24 in Weekly Average Pruritus Numerical Rating Scale (NRS)

    Time frame: Baseline, Week 24

Interested in participating?

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Trial opening soon.

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Sponsors and collaborators

Lead sponsor

Gilead Sciences

Industry

Registry information

Official study title

A Phase 2 Proof-of-Concept Study With a Randomized, Double-Blind, Placebo-Controlled Period, Followed by an Active Treatment Extension Period to Assess the Safety and Efficacy of Seladelpar and Cilofexor in Combination for Primary Biliary Cholangitis

Important dates

Study start
2026
Primary completion
2028
Study completion
2034
First posted
Sep 25, 2026
Registry last updated
Sep 25, 2026

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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