CS0159 in Chinese Patients With PBC (Primary Biliary Cholangitis)

March 12, 2026 updated by: Cascade Pharmaceuticals, Inc

A Phase II Study to Evaluate Safety, Tolerability and Efficacy, of CS0159 in Patients Subjects With PBC (Primary Biliary Cholangitis), Multicenter, Randomized 12-week, Double-blind, Placebo-controlled, and 40-weeks Open Study

A phase II study to evaluate safety, tolerability and efficacy of CS0159 in patients with PBC (Primary Biliary Cholangitis).

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Active, not recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.

Detailed Description

This is a phase II study to evaluate safety, tolerability and efficacy of CS0159 in patients with PBC (Primary Biliary Cholangitis). The study has been designed to have two parts, the first part of the study will be double-blinded for 12 weeks. The second part of the study will be an open-label trail lasting 40 weeks.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Interventional

Enrollment (Actual)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
75

Phase

Phase

The stage of a clinical trial studying a drug or biological product, based on definitions developed by the U.S. Food and Drug Administration (FDA). The phase is based on the study's objective, the number of participants, and other characteristics. There are five phases: Early Phase 1 (formerly listed as Phase 0), Phase 1, Phase 2, Phase 3, and Phase 4. Not Applicable is used to describe trials without FDA-defined phases, including trials of devices or behavioral interventions.
  • Phase 2

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

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Locations

  • China
    • Anhui
      • Hefei, Anhui, China, 230001
        • The First Affiliated Hospital of USTC Anhui Provincial Hospital
    • Beijing Municipality
      • Beijing, Beijing Municipality, China, 100730
        • Peking Union Medical College Hospital
      • Beijing, Beijing Municipality, China, 100069
        • Beijing Youan Hospital, Capital Medical University
      • Beijing, Beijing Municipality, China, 100050
        • Beijing Friendship Hospital, Capitai Medical University
    • Guangdong
      • Guangzhou, Guangdong, China, 510630
        • The Third Affiliated Hospital, Sun Yat-sen University
    • Guangzhou
      • Guangzhou, Guangzhou, China
        • The Fifth Affiliated Hospital of Guangzhou Medical University
    • Henan
      • Zhengzhou, Henan, China
        • Henan Provincial People's Hospital
    • Hubei
      • Wuhan, Hubei, China, 430022
        • Wuhan Union Hospital Of China
    • Hunan
      • Changsha, Hunan, China, 410011
        • The Seconed Xiangya Hospital of Central South University
    • Jiangsu
      • Zhenjiang, Jiangsu, China
        • The Third People's Hospital of Zhenjiang
    • Jilin
      • Changchun, Jilin, China
        • The First Bethune Hospital of Jilin University
    • Shandong
      • Jinan, Shandong, China
        • Qilu Hospital of Shandong University
    • Shanghai Municipality
      • Shanghai, Shanghai Municipality, China, 200120
        • Renji Hospital, Shanghai Jiao Tong University School of Medicine
    • Sichuan
      • Chengdu, Sichuan, China
        • West China Hospital, Sichuan University
    • Zhejiang
      • Hangzhou, Zhejiang, China
        • The First Affiliated Hospital，Zhejiang University School of Medicine
      • Hangzhou, Zhejiang, China, 310000
        • Shaoyifu Hospital of Zhejiang University Medical

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

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  1. When signing ICF age≥18 years≤75 years, male or female
  2. Meets the diagnostic criteria of PBC, such as elevation ALP, positive AMA or AMA-M2, If negative for AMA, positive for PBC specific antibody and Liver biopsy meeting PBC criteria six months before screening
  3. 1.67 × ULN ≤ALP ≤ 10 × ULN and TBil≤ 3 × ULN
  4. UDCA≥6 months before randomization and a stable dose (no less than 13-15 mg/kg/d in principle) ≥3 months after the efficacy was poor (meeting inclusion criteria 3), or UDCA was not tolerated, and stop taking UDCA (no UDCA use for ≥3 months before randomization)

  5. Understand the study content, comply with the study protocol, and sign the ICF voluntarily

    -

Exclusion Criteria:

  1. ALT or AST>5×ULN；
  2. OCA(Obercholic acid) in the 3 months prior to randomization
  3. Known concomitant hepatobiliary disease or history
  4. Significant hepatic impairment as defined by Child-Pugh classification of B or C, history of liver transplantation, current placement on a liver transplant list or current Model for End Stage Liver Disease (MELD) score ≥15.
  5. Patients were screened for HBsAg positive, HCVAb positive, HIV Ab positive, or TPAb positive.
  6. (creatinine, Cr) ≥1.5×ULN and Cr clearance rate <60 mL/min
  7. Platelet<80×10^9/L；
  8. INR>1.3
  9. ALB<3.5 g/dL
  10. Severe pruritus or systemic medication was required within 2 months prior to randomization
  11. Arrhythmia, Or during screening the QTc interval was ≥450 ms for male and 470 ms for female
  12. History or presence of any disease or condition known to interfere with the absorption, distribution, metabolism, or excretion of drugs including bile salt metabolism in the large intestine, eg, inflammatory bowel disease, prior or planned (during the study period) bariatric surgery (such as gastroplasty, roux-en-Y gastric bypass).
  13. Concomitant use of medications, food, and drinks that are strong or moderate CYP3A4 inhibitors or inducers within 14 days prior to the first dose of study drug and throughout the study duration.
  14. Diseases that may cause non-hepatic elevation of ALP (such as Paget's disease) or may result in a life expectancy of less than 2 years
  15. A history of malignant tumor within 5 years prior to randomization
  16. Perazathioprine, colchicine, cyclosporine, methotrexate, mycophenolate, and pentoxifylline were administered from 28 days before randomization to the entire clinical study period. Fenofibrate or other Bates; Budesonide and other systemic corticosteroid hormones; Hepatotoxic drugs; Liver protection Drugs and other hepatoprotective drugs were given a stable dose <28 days before randomization or could not be maintained during the trial; cholagogue
  17. The administration of interleukin or other cytokine antibodies, as well as chemical factors or immunotherapy, was prohibited from 12 months prior to randomization throughout the clinical study period
  18. Substance abuse or alcoholism from 6 months prior to randomization throughout the entire clinical study period
  19. Poor blood pressure control is indicated by a systolic pressure greater than 160 mmHg or diastolic pressure greater than 100 mmHg during screening
  20. Poor blood glucose control, that is, HBA1c >9.0% at screening
  21. Pregnancy, planned pregnancy, lactation
  22. Use of other investigational drugs within 3 months
  23. Any other condition(s) that would compromise the safety of the patient or compromise the quality of the clinical study, as judged by the investigator

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: Randomized
  • Interventional Model: Parallel Assignment
  • Masking: Double

Arms and Interventions

Participant Group / Arm

Participant Group / Arm

A group or subgroup of participants in a clinical trial that receives a specific intervention/treatment, or no intervention, according to the trial's protocol.
Intervention / Treatment

Intervention / Treatment

A process or action that is the focus of a clinical study. Interventions include drugs, medical devices, procedures, vaccines, and other products that are either investigational or already available. Interventions can also include noninvasive approaches, such as education or modifying diet and exercise.
Experimental: 2mg CS0159
QD for 12 weeks
Drug: Placebo
Oral QD
Drug: 2mg CS0159
Oral QD
Experimental: 4mg CS0159
QD for 12 weeks
Drug: 2mg CS0159
Oral QD
Experimental: Placebo
QD for 12 weeks
Drug: Placebo
Oral QD

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
AE incidence
Time Frame: baseline to 12 weeks
AE incidence in three arms
baseline to 12 weeks
relative changes from baseline in ALP at week 12
Time Frame: baseline to 12 weeks
Compared with placebo ,Percentage change of CS0159 to ALP relative to baseline
baseline to 12 weeks

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Absulute changes from baseline in ALP at week 12
Time Frame: baseline to 12 weeks
Compared with placebo, CS0159 changes in serum ALP relative to baseline
baseline to 12 weeks
ALP and TBil
Time Frame: baseline to 12 weeks
Compared with placebo, the rate of subjects to achive the lelve of ALP< 1.67 ULN and (total bilirubin) TBil ≤ULN
baseline to 12 weeks
Pruritus
Time Frame: from basline to 40 weeks
the changes from baseline in Pruritus to week 40
from basline to 40 weeks
Liver function: ALT, AST, ALB, LDL-C, HDL-C, TBA, GGT, TC, TG
Time Frame: from baseline to week 40.
The reduction of ALT, AST, ALB, LDL-C, HDL-C, TBA, GGT, TC, and TG from baseline to week 40.
from baseline to week 40.

Collaborators and Investigators

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

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
Cascade Pharmaceuticals, Inc

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Study Director: Rong Deng, Cascade Pharmaceuticals, Inc

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 (Actual)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 7, 2023

Primary Completion (Actual)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
December 31, 2025

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
March 15, 2026

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
May 17, 2023

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 7, 2023

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
June 9, 2023

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
March 13, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
March 12, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
March 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • PBC-CS0159-004

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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