Association of prohepcidin and hepcidin-25 with erythropoietin response and ferritin in hemodialysis patients.

Abstract:

:Hepcidin is a key regulator of iron metabolism. In this study, we examined whether measurement of hepcidin is useful in assessing recombinant human erythropoietin (rHuEPO) responsiveness in regular hemodialysis (HD) patients in a cross-sectional fashion. We examined the association between serum prohepcidin, a prohormone of hepcidin, and rHuEPO dosage and the rHuEPO/hemoglobin (Hb) ratio in 75 HD patients. We also semiquantatively measured the peak intensity of serum hepcidin-25, the major form of mature hepcidin, in 24 HD patients by using surface-enhanced laser desorption ionization time of flight time mass spectrometry, and compared those between rHuEPO-hyporesponsive (rHuEPO 192 +/- 10 [126-252] IU/kg/week, n = 15) and responsive patients (rHuEPO 40 +/- 9 [0-81] U/kg/week, n = 9). A significant but weak relationship was found between serum prohepcidin and rHuEPO dosage (r = 0.24, p < 0.05) and rHuEPO/Hb ratio (r = 0.22, p = 0.06). However, prohepcidin did not become an indicator of hematopoietic parameters by multiple regression analysis. Serum hepcidin-25 intensity was significantly and positively correlated with ferritin (r = 0.51, p < 0.01) but not with log-transformed C-reactive protein. There was no difference in the intensities of serum hepcidin-25 between rHuEPO-hyporesponsive and responsive patients (64 +/- 10 vs. 52 +/- 16 AU, p = NS). It follows from these findings that the assessment of serum hepcidin using currently available assays was not valid in predicting rHuEPO responsiveness in chronic HD patients.

journal_name

Am J Nephrol

authors

Kato A,Tsuji T,Luo J,Sakao Y,Yasuda H,Hishida A

doi

10.1159/000109968

subject

Has Abstract

pub_date

2008-01-01 00:00:00

pages

115-21

issue

1

eissn

0250-8095

issn

1421-9670

pii

000109968

journal_volume

28

pub_type

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