New hope for rare liver disease: experimental drug CS0159 enters Mid-Stage trial
NCT ID NCT05896137
First seen Jun 27, 2026 · Last updated Jun 27, 2026
Summary
This Phase 2 trial tests an experimental drug called CS0159 in 50 people with primary sclerosing cholangitis (PSC), a rare liver disease. The study has a 12-week placebo-controlled phase followed by a 40-week open-label period to check safety and how well the drug works. Researchers will measure side effects and changes in liver enzyme levels.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- CS0159 (oral drug)
- What this could lead to
- If successful, this could point toward a new treatment to control primary sclerosing cholangitis and reduce liver damage.
- What could go wrong
- This is an early Phase 2 trial with only 50 participants, so results may not apply broadly. The drug may not improve outcomes or could cause side effects.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 2
Tests whether the treatment actually works, and watches for side effects, in a larger group.
- Participants
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About 50 people
The number the study aims to enrol. It can still change while the study runs.
- Started
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Aug 2023
- Expected to finish
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May 2026
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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18 to 75 years
- Sex
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Anyone
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: 1. Male or female age≥18 or age≤75 years when sign ICF 2. Within the last year, have a clinical diagnosis of PSC with a consistent magnetic resonance cholangiopancreatography (MRCP) orendoscopic retrograde cholangiopancreatography (ERCP) Prcutaneous Transhepatic Cholangiography(PTC) showing sclerosing cholangitis 3. 1.50×ULN≤ALP≤10×ULN, and TBil≤3×ULN during screen 4. Taken UDCA(≤25mg/kg/d)≥6 months before randomization and stable does≥ 3 months, or not used UDCA≥3 months before randomization 5. For subject with a history of IBD 1. Patients with Crohn's Disease (CD),Must be in remission, CDAI\<150 or CDAI of score ≤4 2. Patients with(Ulcerative Colitis)UC,Must be in remission or only mild activity,Some Mayo scores range from 0 to 4 6. Be able to understand and Comply with the study protocol sign a written informed consent form(ICF)voluntarily Exclusion Criteria, 1. Presence of documented secondary sclerosing cholangitis when screening,or direct evidence IgG4 related sclerosing cholangitis or serum IgG4 ≥ 4 ×ULN 2. Small duct PSC 3. ALT or AST\>5×ULN 4. Taken( ObeticholicAcid) OCA within 3 months before randomization 5. Acute cholangitis was suspected or confirmed within 3 months prior to randomization, Including acute cholangitis being treated during screening 6. Presence of percutaneous drain or bile duct stent at the time of screening or during the study 7. Known concurrent comorbidities with other hepatobiliary diseases including, but not limited to: active hepatitis B virus or hepatitis C virus infection (see Exclusion Criterion 9), primary biliary cholangitis, complete biliary obstruction, acute cholecystitis or gallstones with significant symptoms, Autoimmune Hepatitis (AIH) or overlap with other autoimmune liver diseases, Alcoholic Hepatitis, Non-Alcoholic Steatohepatitis, Suspected or Diagnosed Primary Hepatocellular Cancer, and Bile Duct Cancer; 8. Child-Pugh patients with grade B or C cirrhosis,Present complications related to cirrhosis or End-stage liver disease ,Including history of liver transplantation Preparing for liver transplantation (Model for End-Stage Liver Disease)MELD≥15,Portal hypertension complications,Complications of cirrhosis 9. Patients who are HBsAg-positive, HCVAb-positive, HIVAb-positive or TPAb-positive at screening 10. Cr(Creatinine)≥1.5×ULN also Cr(Creatinine)clearance rate\<60 mL/min 11. PLT(Platelet)\<80×10\^9/L 12. INR(international normalized ratio)\>1.3 13. ALB\<3.5g/dL 14. Severe pruritus may require systemic medication Within 2 months prior to randomization 15. Arrhythmia,male QTc≥450 ms,female QTc≥470 ms, during screening 16. A disease that interferes with the absorption, distribution, metabolism, or excretion of a test drug,such as moderate to severe activity IBD patient, Previous gastric bypass surgery 17. Moderate or intense inhibition of CYP3A4 was performed during 14 days prior to randomization and throughout the trial Preparation or inducer 18. The presence of diseases that may cause non-hepatic elevation of ALP (e.g. Paget's disease) or may cause it Diseases with a life expectancy of less than 2 years 19. History of malignancy within the past 5 years prior to randomization 20. Immunosuppressants, budesonide, and other systemic glucocorticoids were used within 28 days before randomization and throughout the clinical study period; 21. Use of fenofibrate or another fibrate within 28 days prior to randomization and throughout the clinical study period; Hepatotoxic drugs; Hepatoprotective drugs and other hepatoprotective drugs were given stable doses \<28 days before randomization or could not maintain stable doses during the trial; cholagogue 22. Interleukin or other cytokines were used 12 months before randomization and throughout the trial Or antibodies to chemokines or immunotherapy 23. Drug and/or alcohol abuse within the first six months of randomization 24. Poor blood pressure control,systolic pressure\>160 mmHg or dpb \>100 mmHg 25. Poor blood sugar control,Glycated hemoglobin\>9.0% 26. Females who are pregnant or plan to pregnant,Fertile but refusing to sign informed consent, or breastfeed 27. Participated any other study within 30 days prior randomization,and received other experimental medications therapy 28. It is unsuitable to participate for the study or has other diseases by the investigator
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
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Beijing Friendship Hospital, Captail Medcial University
Beijing, Beijing Municipality, 100050, China
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Beijing YouAn Hostital, Captial Medical University
Beijing, Beijing Municipality, 100069, China
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Peking Union Medical College Hospital
Beijing, Beijing Municipality, 100730, China
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Qilu Hospital of Shandong University
Jinan, Shandong, China
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Renji Hospital, Shanghai Jiao Tong University School of Medicine
Shanghai, Shanghai Municipality, 200120, China
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Shaoyifu Hospital of Zhejiang University Medical
Hangzhou, Zhejiang, 310000, China
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The First Affiliated Hospital of USTC Anhui Provincial Hospital
Hefei, Anhui, China
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The First Affiliated Hospital,Zhejiang University School of Medicine
Hangzhou, Zhejiang, China
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The First Bethune Hospital of Jilin University
Changchun, Jilin, China
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The Seconed Xiangya Hospital of Central South University
Changsha, Hunan, 410011, China
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Wuhan Union Hospital of China
Wuhan, Hubei, 430022, China
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