An Investigational Study of ESK-001 in Participants With Normal Liver Function and Participants With Mild, Moderate, and Severe Liver Damage

May 7, 2026 updated by: Alumis Inc

A Phase 1, Open Label, Single Dose Study to Investigate the Effect of Hepatic Impairment on the Pharmacokinetics of ESK001

This a phase 1, open label, single dose, parallel cohort study to determine the pharmacokinetics (PK) of study drug (ESK-001) in healthy volunteer participants, and participants with mild, moderate, and severe hepatic impairment.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Completed

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 clinical trial information was submitted voluntarily under the applicable law and, therefore, certain submission deadlines may not apply. (That is, clinical trial information for this applicable clinical trial was submitted under section 402(j)(4)(A) of the Public Health Service Act and 42 CFR 11.60 and is not subject to the deadlines established by sections 402(j)(2) and (3) of the Public Health Service Act or 42 CFR 11.24 and 11.44.)

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.
32

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 1

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

  • United States
    • California
      • Lake Forest, California, United States, 92630
        • Orange County Research Center
    • Florida
      • Miami Lakes, Florida, United States, 33104
        • Panax Clinical Research
      • Orlando, Florida, United States, 32809
        • Orlando Clinical Research Center
    • Tennessee
      • Knoxville, Tennessee, United States, 37920
        • Alliance for Multispecialty Research

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

Yes

Description

Key Inclusion Criteria for All Participants:

  • Body mass index between 18.0 and 40.0 kg/m2

Key Inclusion Criteria for Participants with Hepatic Impairment:

  • Diagnosis of chronic (> 6 months), stable hepatic impairment with no clinically significant changes within 30 days prior to dosing, as determined by medical history

Key Exclusion Criteria for All Participants:

  • Uncontrolled treated/untreated hypertension (systolic blood pressure ≥ 160 mmHg and/or diastolic blood pressure ≥ 105 mmHg), or uncontrolled treated/untreated hypotension (systolic blood pressure < 90 mmHg and/or diastolic blood pressure < 50 mmHg), or resting pulse rate < 45 or > 100 bpm. Measurements may be repeated once in order to determine eligibility

Key Exclusion Criteria for Healthy Volunteer:

  • Significant history or clinical manifestation of any metabolic, allergic, dermatological, hepatic, renal, hematological, pulmonary, cardiovascular, gastrointestinal, neurological, respiratory, endocrine, or psychiatric disorder, as determined by the investigator or designee.
  • Positive hepatitis panel and/or positive human immunodeficiency virus test.

Key Exclusion Criteria for Participants with Hepatic Impairment:

  • History of any uncontrolled or unstable renal, hematological, gastrointestinal, neurological, endocrine, or psychiatric disorder, as determined by the investigator or designee, within 6 months prior to screening.
  • History or current diagnosis of uncontrolled or significant cardiac disease indicative of a significant risk of safety for participation in the study.
  • Liver function tests outside the appropriate reference ranges that are not consistent with hepatic dysfunction, as determined by the investigator or designee.
  • QTcF > 480 ms for males or > 490 ms for females at screening or check-in, as confirmed from the mean of the original value and 2 repeats.

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: Non-Randomized
  • Interventional Model: Parallel Assignment
  • Masking: None (Open Label)

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: Healthy Volunteer
Up to 24 healthy volunteer participants will receive a single dose of ESK-001
Drug: envudeucitinib
Single oral dose of ESK-001 in participants from all cohorts
Experimental: Mild Hepatic Impairment
8 participants with mild hepatic impairment will receive a single dose of ESK-001
Drug: envudeucitinib
Single oral dose of ESK-001 in participants from all cohorts
Experimental: Moderate Hepatic Impairment
8 participants with moderate hepatic impairment will receive a single dose of ESK-001
Drug: envudeucitinib
Single oral dose of ESK-001 in participants from all cohorts
Experimental: Severe Hepatic Impairment
8 participants with severe hepatic impairment will receive a single dose of ESK-001
Drug: envudeucitinib
Single oral dose of ESK-001 in participants from all cohorts

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
Time Frame
Maximum observed plasma concentration (Cmax)
Time Frame: 48 hours
48 hours
Area under the plasma concentration-time curve from time zero to the time of the last quantifiable concentration [AUC(0-T)]
Time Frame: 48 hours
48 hours
Area under the plasma concentration-time curve from time zero extrapolated to infinite time [AUC(INF)]
Time Frame: 48 hours
48 hours

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
Time Frame
Incidence of nonserious adverse events (AE), serious adverse events (SAE), and AE leading to discontinuation
Time Frame: 48 hours
48 hours
Number of clinically significant changes in clinical laboratory values, vital signs, ECGs, and physical examinations
Time Frame: 48 hours
48 hours

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.
Alumis 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: Jorn Drappa, Medical Director, Alumis 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.
April 29, 2025

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.
March 24, 2026

Study Completion (Actual)

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 24, 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).
April 22, 2025

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.
April 29, 2025

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.
May 1, 2025

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.
May 12, 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.
May 7, 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.
May 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.
  • ESK-001-022

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

UNDECIDED

IPD Plan Description

The Sponsor Alumis Inc. is a clinical-stage pharmaceutical company that has not yet adopted an Individual Participant Data (IPD) sharing plan.

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

Yes

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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