Efficacy and safety of IV ferumoxytol for iron deficiency anemia in patients with cancer
Authors Vadhan-Raj S, Dahl NV, Bernard K, Li Z, Strauss WE
Received 31 March 2017
Accepted for publication 5 October 2017
Published 7 December 2017 Volume 2017:8 Pages 199—209
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Colin Mak
Peer reviewer comments 3
Editor who approved publication: Dr Martin Bluth
Saroj Vadhan-Raj,1 Naomi V Dahl,2 Kristine Bernard,2 Zhu Li,2 William E Strauss2
1Division of Cancer Medicine, University of Texas, MD Anderson Cancer Center, Houston, TX, USA; 2AMAG Pharmaceuticals, Inc., Waltham, MA, USA
Purpose: Iron deficiency anemia (IDA) is common in cancer patients due to blood loss and inflammation. Many do not tolerate oral iron or adequately respond. Intravenous (IV) iron is commonly used as an adjunct to erythropoiesis-stimulating agents; data on the use of IV iron monotherapy in these patients are limited. This study aimed to evaluate IV ferumoxytol for the treatment of cancer patients with IDA with a history of unsatisfactory oral iron therapy or in whom oral iron could not be used.
Patients and methods: This post hoc analysis of pooled data from two multicenter, randomized, controlled, Phase III trials evaluating IV ferumoxytol (510 mg ×2) vs placebo or iron sucrose (200 mg ×5) included a subgroup of 98 patients with cancer that the investigator identified as the primary cause of their IDA, or with cancer whose IDA was attributed to another comorbid condition (ferumoxytol, n=75; iron sucrose, n=13; placebo, n=10). Gastrointestinal cancers were most common (42), followed by breast (14), cervix (ten), and lung (nine). The primary endpoint was the mean change in hemoglobin (Hgb) from baseline to week 5.
Results: At week 5, both ferumoxytol and iron sucrose produced significant increases in Hgb from baseline (1.8 g/dL [P<0.0001] and 1.9 g/dL [P=0.002], respectively). During the studies, 45 patients received chemotherapy, 19 with platinum-based regimens. Erythropoiesis-stimulating agent doses were neither increased >20% nor initiated in any treatment group. Overall rates of adverse events and serious adverse events in the cancer subgroup mirrored those in the overall study population.
Conclusion: Monotherapy with IV iron appears to be an effective option for cancer patients with IDA who do not respond to or cannot tolerate oral iron therapy.
Keywords: anemia, cancer, ferumoxytol, hemoglobin, efficacy, intravenous iron
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