Study to Evaluate the Safety and Efficacy of Oral Vadadustat in Pediatric Participants With Anemia of Chronic Kidney Disease Naive to Erythropoiesis-Stimulating Agents (CORRECTION)

September 26, 2025 updated by: Akebia Therapeutics

A Multicenter, Open-label Study to Evaluate the Safety and Efficacy of Once Daily Oral Vadadustat for The Treatment of Pediatric Subjects With Anemia of Chronic Kidney Disease Naive to Erythropoiesis-stimulating Agents

This study will assess the safety and efficacy of once daily dosing of vadadustat for the treatment of pediatric participants with anemia of chronic kidney disease (CKD) naive to erythropoiesis-stimulating agent (ESA) treatment.

Study Overview

Status

Status

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Withdrawn

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.

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

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 3

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Locations

  • United States
    • New Jersey
      • Hackensack, New Jersey, United States, 07601
        • Research Site

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

4 months to 16 years (Child)

Accepts Healthy Volunteers

No

Description

Inclusion Criteria:

  • Diagnosis of anemia of chronic kidney disease (CKD)
  • Diagnosis of non-dialysis-dependent (NDD) CKD with an estimated glomerular filtration rate of greater than (>) 10 and less than (<) 60 milliliters/minute/1.73 meters^2 (mL/min/1.73 m^2 ) or diagnosis of dialysis dependent (DD) CKD
  • Mean screening hemoglobin (Hb) <10.0 grams/deciliters (g/dL)
  • Transferrin Saturation ≥ 20%

Exclusion Criteria:

  • Anemia due to a cause other than CKD
  • Active bleeding or recent clinically significant blood loss
  • Treatment with an erythropoiesis-stimulating agents (ESA) within 8 weeks prior to Screening
  • History of sickle cell disease, myelodysplastic syndromes, bone marrow fibrosis, hematologic malignancy, myeloma, hemolytic anemia, thalassemia, or pure red cell aplasia
  • Red Blood Cells transfusion within 4 weeks
  • Serum albumin level <2.5 g/dL
  • Uncontrolled hypertension
  • Active malignancy or treatment for malignancy within the past 2 years prior to Screening
  • Evidence of iron overload or diagnosis of hemochromatosis
  • Known hypersensitivity to vadadustat or any excipients in vadadustat tablet

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: N/A
  • Interventional Model: Single Group 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: Vadadustat
Cohort 1: participants with ≥12 years to <17 years; Cohort 2: participants with ≥6 years to <12 years; Cohort 3(a): participants with ≥2 years to <6 years; and Cohort 3(b): participants with ≥4 months to <2 years
Drug: Vadadustat
Vadadustat tablet orally once a day for 52 weeks
Other Names:
  • AKB-6548

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
Mean Change in Hemoglobin (Hb) Values Between Baseline and the Primary Evaluation Period (Average Hb From Weeks 21 to 28)
Time Frame: Baseline; Weeks 21 to 28
Baseline; Weeks 21 to 28

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
Number of Participants With Mean Hb Values Within the Target Range During the Primary Evaluation Period
Time Frame: From Week 21 to Week 28
From Week 21 to Week 28
Number of Participants With Mean Hb Values Within the Target Range During the Extension Period
Time Frame: From Week 29 to Week 52
From Week 29 to Week 52
Number of Participants With Treatment-emergent Adverse Events and who Discontinued From the Study due to Adverse Events
Time Frame: Up to Week 56
Up to Week 56
Maximum Observed Plasma Concentration (Cmax) of Vadadustat and its Metabolites
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Time to Reach Cmax (Tmax) of Vadadustat and its Metabolites
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Area Under the Plasma Concentration-Time Curve From 0 to Last Quantifiable Concentration (AUC 0-t) of Vadadustat and its Metabolites
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Terminal Elimination Half-Life (t1/2) of Vadadustat and its Metabolites
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Change From Baseline in Serum Erythropoietin (EPO)
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Change From Baseline in Reticulocyte Count
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Change From Baseline in Hb levels
Time Frame: Pre-dose and post-dose at intermediate time points up to 28 weeks
Pre-dose and post-dose at intermediate time points up to 28 weeks
Time to Achieve First Hb Levels ≥10.0 grams/deciliters (g/dL)
Time Frame: Up to Week 52
Up to Week 52

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.
Akebia Therapeutics

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: Chief Medical Officer, Akebia Therapeutics 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 (Estimated)

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.
January 1, 2025

Primary Completion (Estimated)

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.
July 1, 2026

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.
October 1, 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).
September 28, 2021

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.
October 14, 2021

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.
October 19, 2021

Study Record Updates

Last Update Posted (Estimated)

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.
October 1, 2025

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.
September 26, 2025

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.
September 1, 2025

More Information

Terms related to this study

Keywords

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.
  • AKB-6548-CI-0042

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

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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