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WithdrawnNCT05082571CONVERSIONUpdated Oct 1, 2025

Study to Evaluate the Safety and Efficacy of Oral Vadadustat in Pediatric Participants With Anemia of Chronic Kidney Disease

A Phase 3 interventional study of vadadustat in Anemia of Chronic Kidney Disease, sponsored by Akebia Therapeutics. Withdrawn at 1 site in United States. Open to participants aged 4 Months to 16 Years. Per ClinicalTrials.gov, last updated 2025-10-01.

Sponsored by Akebia Therapeutics · Phase 3, Interventional, and Treatment

Why this study was withdrawn
Sponsor decision
Phase
Phase 3
Study type
Interventional
Enrollment
0
Allocation
Not applicable
Ages
4 Months to 16 Years
Sex
All
01

Study summary

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) after conversion from an Erythropoiesis Stimulating Agent (ESA).

02

Conditions studied

  • Anemia of Chronic Kidney Disease

Keywords

  • anemia
  • kidney disease
  • vadadustat
  • pediatric population
  • children
  • chronic kidney disease
  • erythropoiesis stimulating agent
  • dialysis
  • hypoxia-inducible factor (HIF) prolyl hydroxylase inhibitor
03

In context

Anemia

1,733 studies on the registry are indexed under Anemia; 246 are open to participants now.

Browse Anemia studies →

Lead sponsor

Akebia Therapeutics is the lead sponsor of 34 studies on the registry; 3 are open to participants now.

Of its 21 completed or terminated interventional studies of FDA-regulated products, 12 (57%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
4 Months to 16 Years
Sexes eligible
All
Accepts healthy volunteers
No

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 hemoglobin (Hb) between 9.0 and 12.0 grams/deciliters (g/dL) (inclusive)
  • Transferrin Saturation ≥ 20%

Exclusion criteria

Exclusion Criteria:

  • Anemia due to a cause other than CKD
  • Active bleeding or recent clinically significant blood loss
  • 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 less than 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
05

Study design

Phase
Phase 3
Primary purpose
Treatment
Allocation
Not applicable
Intervention model
Single group
Masking
None (open label)
Enrollment
0 participants (actual)

Study arms

  • 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

Interventions

  • Drugvadadustat

    Vadadustat tablet orally once a day for 52 weeks

    Also known as: AKB-6548

06

What researchers measure

Primary outcomes

  1. 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

Secondary outcomes

  1. Time to Achieve Hb Levels of ≥10.0 grams/deciliters (g/dL)

    Time frame: Up to Week 52

  2. Number of Participants With Mean Hb Values Within the Target Range During the Primary Evaluation Period

    Time frame: From Week 21 to Week 28

  3. Number of Participants With Mean Hb Values Within the Target Range During the Extension Period

    Time frame: From Week 29 to Week 52

  4. Number of Participants With Treatment-emergent Adverse Events and who Discontinued From the Study due to Adverse Events

    Time frame: Up to Week 56

  5. 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

  6. 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

  7. 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

  8. 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

  9. Change From Baseline in Serum Erythropoietin (EPO)

    Time frame: Pre-dose and post-dose at intermediate time points up to 28 weeks

  10. Change From Baseline in Reticulocyte Count

    Time frame: Pre-dose and post-dose at intermediate time points up to 28 weeks

  11. Change From Baseline in Hb levels

    Time frame: Pre-dose and post-dose at intermediate time points up to 28 weeks

07

Study locations

1 site
  • Research Site
    Hackensack, New Jersey 07601, United States
08

References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

09

Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Oct 1, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
10

Registry details

Key details

Study ID
NCT05082571
Lead sponsor
Akebia Therapeutics
Responsible party
Sponsor
First posted
Oct 19, 2021
Start date
Jan 2025 (estimated)
Primary completion
Jul 2026 (estimated)
Completion
Oct 2026 (estimated)
Last update
Oct 1, 2025

Study contacts

Chief Medical Officer
study director · Akebia Therapeutics

Oversight

Data monitoring committee
Yes
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is withdrawn, as verified in Sep 2025. You cannot join it, but the record below documents what was studied.

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