Abstract

Vitamin D analogues, cinacalcet, and sevelamer play pivotal roles in the management of chronic kidney disease-mineral bone disorder, and are noted to have pleiotropic effects. We examined whether these agents might be associated with the responsiveness to erythropoiesis-stimulating agents (ESA). In this cross-sectional study including haemodialysis patients treated with ESA, we searched for clinical parameters associated with the ESA resistance index, which was calculated as the weekly ESA dose divided by the patient's haemoglobin value. Among 45 patients (male: female = 28 : 17, age 68 ± 10 years, haemodialysis duration 84 ± 60 months), vitamin D analogue, cinacalcet, and sevelamer were used in 95.6%, 26.7%, and 84.4% of the patients, respectively. Univariate analysis showed significant association of the ESA resistance index with transferrin saturation rate (TSAT), vitamin D analogue dose, and sevelamer dose. In multivariate analysis, the sevelamer dose and TSAT were found to be independent determinants of the ESA resistance index. Our preliminary data showed an independent association between sevelamer dose and the responsiveness to ESA in haemodialysis patients. Further studies are required to investigate the causal relationship between sevelamer and ESA responsiveness.

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