AI Article Synopsis

  • Shortened red blood cell (RBC) lifespan significantly contributes to anemia in end-stage renal disease (ESRD) patients, highlighting its importance in anemia management strategies.
  • The study measured RBC lifespan in 24 ESRD patients receiving recombinant human erythropoietin (rHuEPO), finding an average lifespan of 63.3 days, with variations based on factors like sex and the hormone erythroferrone.
  • The research successfully employed reticulocyte-based estimation and population modeling to predict hemoglobin concentrations, demonstrating the potential for improved anemia management in ESRD.

Article Abstract

Shortened red blood cell (RBC) lifespan is one of the major factors contributing to anemia in end-stage renal disease (ESRD) patients and should be taken into account in anemia management protocols. In this study, we aimed to estimate RBC lifespan and the source of between-subject variability in ESRD patients. The resulting individual parameters (empirical Bayes estimates) were used to predict hemoglobin concentrations 2 weeks in advance. The reticulocyte-based estimation of RBC lifespan (REBEL) and the population modeling of RBC count data were used. A total of 120 blood samples collected biweekly over 10 weeks in 24 patients receiving maintenance doses of recombinant human erythropoietin (rHuEPO) subcutaneously were included in this analysis. Typical RBC lifespan was estimated to be 63.3 days. RBC lifespan was found to increase with erythroferrone, a recently identified hormone participating in iron metabolism. Approximately, a 10% increase in plasma erythroferrone was associated with a 5% increase in RBC lifespan. In addition, RBC lifespan was 18.7% shorter in females compared with males. Out of 24 subjects, 16 had hemoglobin concentrations predicted within 95% prediction intervals. The median absolute prediction error was 15.9% (interquartile range, 9.5 to 24.7%). We demonstrated that REBEL coupled with the population modeling technique can be used effectively to estimate RBC lifespan. Then, individual parameters can be used to predict future hemoglobin concentrations in ESRD patients.

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http://dx.doi.org/10.1208/s12248-020-0424-9DOI Listing

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