A Trial of Ferumoxytol for the Treatment of Iron Deficiency Anemia in Pediatric Participants With Chronic Kidney Disease

A Randomized, Open-Label, Active-Controlled Study of the Safety, Efficacy, and Pharmacokinetics of Ferumoxytol Compared With Oral Iron for the Treatment of Iron Deficiency Anemia in Pediatric Subjects With Chronic Kidney Disease

Study evaluating the efficacy and safety of intravenous (IV) ferumoxytol compared with oral iron for the treatment of pediatric participants with chronic kidney disease (CKD).

Study AMAG-FER-CKD-251 was a study evaluating the efficacy and safety of IV ferumoxytol in pediatric participants with dialysis-dependent CKD. Study AMAG-FER-CKD-252 (NCT01155388) was a study evaluating the efficacy and safety of IV ferumoxytol in pediatric participants with nondialysis-dependent CKD. Due to significant challenges with enrollment for both studies, Study AMAG-FER-CKD-252 was combined with Study AMAG-FER-CKD-251 and enrollment continued under Study AMAG-FER-CKD-251. The enrollment number (n=14) includes the number of participants for both AMAG-FER-CKD-251 and AMAG-FER-CKD-252 studies, combined.

Participants were enrolled by age cohorts in a stepwise manner following a safety review by the Data Safety Monitoring Board of 1 age cohort prior to enrollment of a subsequent age cohort, with progression from oldest to youngest: Randomization was stratified by the following age cohorts: 12 to <18 years, 6 to <12 years, 2 to <6 years, and 6 months to <2 years.

Key Inclusion Criteria for the combined AMAG-FER-CKD-251 and AMAG-FER-CDK-252 studies include:

1. Males or females 6 months to <18 years of age
2. CKD non-dialysis participants or dialysis-dependent participants who were on peritoneal dialysis or stable hemodialysis prior to Screening
3. Had iron deficiency anemia defined as: a) hemoglobin level ≤12.0 grams/deciliter (g/dL) and b) with either transferrin saturation level ≤40% or ferritin level <100 nanograms/milliliter (ng/mL)
4. Female participants of childbearing potential who were sexually active must have been on an effective method of birth control for at least 1 month prior to Screening and agreed to remain on birth control until completion of participation in the study

Key Exclusion Criteria for the combined AMAG-FER-CKD-251 and AMAG-FER-CDK-252 studies include:

1. History of allergy to either oral or IV iron
2. Hemoglobin level ≤7.0 g/dL
3. Serum ferritin level >600 ng/mL
4. Female participants who were pregnant or intended to become pregnant, or were breastfeeding, were within 3 months postpartum, or had a positive serum pregnancy test