Steven Fishbane, Mark Vishnepolsky, Yemmie Oluwatosin, Jacqueline Nolen, Lixia Zhu, Kerry Cooper, Amy Young
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A phase 3b, multicenter, open-label, single-arm study of roxadustat (ASPEN): Operational learnings within United States dialysis organizations
Introduction
Roxadustat is an oral hypoxia-inducible factor prolyl hydroxylase inhibitor approved in several regions for the treatment of anemia of chronic kidney disease (CKD). ASPEN evaluated the efficacy, safety, and feasibility of roxadustat in patients with anemia of CKD in US dialysis organizations.
Methods
This open-label, single-arm study (NCT04484857) comprised a 6-week screening period, followed by 24 weeks of treatment (with optional extension ≤1 year) and a 4-week follow-up. Patients aged ≥18 years, receiving chronic dialysis, with hemoglobin (Hb) 9.0–12.0 g/dL if converting from erythropoiesis-stimulating agents (ESAs), or <10.0 g/dL if receiving ESAs for <6 weeks, received oral roxadustat three times weekly in-center. Primary efficacy endpoints included proportion of patients with mean Hb ≥10 g/dL, averaged over weeks 16–24, and mean Hb change from baseline to the average over weeks 16–24. Safety was also assessed.
Findings
Overall, 283 patients were enrolled and treated, 282 (99.6%) were included in the full analysis set, and 216 (76.3%) continued into the extension period. Most patients enrolled were from DaVita sites (71%), with the rest from US Renal Care sites (29%). Mean (standard deviation [SD]) baseline Hb was 10.6 (0.7) g/dL. Nearly all patients were prior ESA users (n = 274; 97.2%). The proportion of patients with mean Hb ≥10 g/dL during weeks 16–24 was 83.7% (95% confidence interval 78.9–88.6). Mean (SD) Hb increase from baseline to the average over weeks 16–24 was 0.2 (1.0) g/dL. During the treatment period, 82 (29.0%) patients reported treatment-emergent serious adverse events (TESAEs). The most common TESAEs were COVID-19 pneumonia (n = 10; 3.5%), acute respiratory failure (n = 9; 3.2%), COVID-19 (n = 7; 2.5%), acute myocardial infarction (n = 7; 2.5%), and fluid overload (n = 6, 2.1%).
Discussion
Roxadustat was effective in maintaining Hb in patients with anemia of CKD on dialysis in large, community-based dialysis organizations.
期刊介绍：
Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance.
Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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