PERSEUS: Preliminary Efficacy and Safety of Cenicriviroc in Adult Participants With Primary Sclerosing Cholangitis

Inclusion Criteria:

- Participants with chronic cholestatic liver disease for at least 6 months

- Clinical diagnosis of Primary Sclerosing Cholangitis (PSC) as evident by chronic
cholestasis of more than six months duration with either a consistent magnetic
resonance cholangiopancreatography (MRCP)/endoscopic retrograde
cholangiopancreatography (ERCP) showing sclerosing cholangitis, or a liver biopsy
taken at any time consistent with PSC in the absence of a documented alternative
etiology for sclerosing cholangitis. If diagnosis of PSC was made by histology alone,
it must require the presence of fibro-obliterative lesions (i.e., onion skin lesions)

- Participants with or without Inflammatory Bowel Disease (IBD) are allowed. If
participant has IBD, documented evidence of IBD either by prior endoscopy or in
previous medical records, for ≥ 6 months. In addition, participants will be required
to enter the study with a Partial Mayo Risk score of 0-3, inclusively

- In participants receiving treatment with ursodeoxycholic acid (UDCA), therapy must be
stable for at least 3 months, and at a dose not greater than 20 mg/kg/day

- Serum ALP greater than 1.5 × upper limit of normal (ULN)

- Ability to understand and sign a written informed consent form (ICF)

- Participants receiving allowed concomitant medications need to be on stable therapy
for 28 days prior to the Baseline Visit with the exception of UDCA in which
participants need to be on stable therapy for ≥ 3 months

Exclusion Criteria:

- Presence of documented secondary sclerosing cholangitis (such as ischemic cholangitis,
recurrent pancreatitis, intraductal stone disease, severe bacterial cholangitis,
surgical or blunt abdominal trauma, recurrent pyogenic cholangitis,
choledocholithiasis, toxic sclerosing cholangitis due to chemical agents, or any other
cause of secondary sclerosing cholangitis) on prior clinical investigations

- Small duct PSC

- Presence of percutaneous drain or bile duct stent

- History of cholangiocarcinoma or high clinical suspicion over dominant stricture
within 1 year by MRCP/ERCP or clinical judgment

- Ascending cholangitis within 60 days prior to Screening

- Alcohol consumption greater than 21 units/week for males or 14 units/week for females
(one unit of alcohol is ½ pint of beer [285 mL], 1 glass of spirits [25 mL] or 1 glass
of wine [125 mL])

- Prior or planned liver transplantation

- Presence of alternative causes of chronic liver disease, including alcoholic liver
disease, non-alcoholic steatohepatitis, primary biliary cirrhosis, autoimmune
hepatitis

- History of cirrhosis and/or hepatic impairment (Child-Pugh classes A, B and C) and/or
hepatic decompensation including ascites, encephalopathy or variceal bleeding.
Participants who show evidence of significant worsening of hepatic function will be
excluded

- Participants with fibrosis evidence of cirrhosis, as determined by local transient
elastography (TE, e.g., Fibroscan) values of ≥ 13.0 kPa, taken within the last 6
months. If TE has not been conducted within the 6 months prior to screening, then one
will be conducted during the screening period and can be used as the Baseline value.

- Moderate to Severe active IBD or flare in colitis activity within the last 90 days
requiring intensification of therapy beyond Baseline treatment. Participants with
stable mild to moderate IBD, who are on treatment, are allowed provided they are
stable for 3 months with 5-amino salicylic acid drugs or Azathioprine (allowed dose of
azathioprine is 50-200 mg/day)

- Use of oral prednisolone > 10 mg/day, biologics and/or hospitalization for colitis
within 90 days are disallowed

- Aspartate aminotransferase (AST) and alanine aminotransferase (ALT); above the allowed
cut-offs, as determined by Screening values:

- AST > 200 IU/L males and females

- ALT: males > 250 IU/L and females > 200 IU/L

- Total Bilirubin and Direct Bilirubin; above the allowed cut-offs, as determined by
Screening values:

- Total Bilirubin > 2.0 mg/dL

- Direct Bilirubin > 0.8 mg/dL

- International normalized ratio > 1.3 in the absence of anticoagulants

- Immunoglobulin G4 (IgG4) > 4 × ULN at Screening or evidence of IgG4-related sclerosing
cholangitis

- Females who are pregnant or breastfeeding

- Any other clinically significant disorders or prior therapy that, in the opinion of
the investigator, would make the participant unsuitable for the study or unable to
comply with the dosing and protocol requirements