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The PACIFIC Study - Fully recruited

Evaluating EP547 in People with Cholestatic Itch due to Primary Biliary Cholangitis or Primary Sclerosing Cholangitis (PACIFIC)

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About EP547

People with cholestatic liver diseases like primary sclerosing cholangitis (PSC) or primary biliary cholangitis (PBC) often experience severe itch (pruritus), which can affect the amount and quality of sleep, degree of tiredness, and overall quality of life.

How itch occurs in these individuals is not fully understood.

However, in people with liver disease there can be a build-up in the blood and in the skin of certain chemicals found in bile (a fluid made by your liver to aid in digestion). It has long been suspected that these chemicals cause itch. More recently, it was discovered that these chemicals activate a receptor known as MRGPRX4, which is found on nerve cells in the skin known to cause itch.

EP547 is a unique compound that is designed to block activators of MRGPRX4, which may lead to less itching. EP547 is not intended to improve the liver disease associated with PBC or PSC, but rather to help reduce the itch that liver disease can cause.

Key information

 

Trial Name The PACIFIC Study

Study to Evaluate EP547 in Subjects With Cholestatic Pruritus Due to Primary Biliary Cholangitis or Primary Sclerosing Cholangitis (PACIFIC)

ClinicalTrials.gov Identifier NCT05525520
Phase Phase 2
Intervention EP547 (or placebo) oral tablets once daily
Recruiting now? Fully recruited
Liver disease diagnosis Confirmed diagnosis of PSC or PBC based on clinical guidelines
Age 18 -80 years
Females: can I be pregnant? No
Is IBD allowed? Yes, if meeting additional relevant criteria
Is there an ALP (alkaline phosphatase) requirement? No
Can I take UDCA (Urso)? Yes, UDCA use is allowed if you have been treated for at least one year, have been on a stable dose for at least 12 weeks, and maintain that dose during the study
Can I take part if I have a stent? No, you cannot take part if you have a biliary stent
Are recent acute cholangitis (ie bacterial cholangitis) attacks allowed? No, you must not have had a cholangitis attack for at least 3 months
Can I take part if I have had a liver transplant? No
Is cirrhosis allowed? No
Previous studies and information
  • Results from a Phase 1 safety study of EP547 were presented as a poster at AASLD 2021: 2021 Taylor, K, et al. First-in-human study of EP547, a potent and highly selective MRGPRX4 inverse agonist in development for treatment of cholestatic pruritus. Hepatology, Volume 74, Number 1 (Suppl), AASLD Abstracts. Please find Abstract #1272 in Outline section. doi/epdf/10.1002/hep.32188.
Are travel expenses covered? The study staff can tell you about any reimbursement for travel-related expenses or compensation that may be available.
Procedures and tests include: Questionnaires on a mobile device, blood and urine tests, and liver transient elastography (Fibroscan) at Screening.
A biopsy is not required.
How many study visits will there be? How long will each study visit be? There are a total of 9 study visits which generally last 1-2 hours. Some visits may be conducted remotely from your home if you wish.
Duration of study Study participation lasts about 4 months
Basic design of study This is a randomised, double-blind, placebo-controlled study with a 1:1 randomisation. This means participants have a 50% chance of getting the study drug and a 50% chance of getting the placebo (dummy drug) for a treatment period of six weeks. This is followed by an open-label extension, meaning that all participants will receive the study drug after completing the six-week treatment period.
More information PACIFICitchstudy.com

In people with liver disease, there can be a build-up in the blood and in the skin of certain chemicals that are suspected to cause itch. More recently, it was discovered that these chemicals activate a receptor known as MRGPRX4, which is found on nerve cells in the skin known to cause itch. EP547 is a unique compound that is designed to block activators of MRGPRX4, which may lead to less itching.

Link to Sponsor Escient Pharmaceuticals

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