Abstract
Background: Erythroferrone (ERFE) is a glycoprotein hormone synthesis and release by erythroblasts. Recently identified as an erythropoietic regulator and activated in response to stimulating erythropoietin (Epo). In chronic kidney diseases (CKD), anemia is a hallmark disorder due to a decrease in hyposensitive erythropoietic to the Epo; these patients recommended to use of Erythropoiesis-stimulating agents (ESAs). The aim: This study aimed to assess serum ERFE level in patients with CKD and investigate the continuing effects of long-term anemic ESA use associated with markers of erythropoiesis and iron metabolism. Methods: Sixty-five CKD patients divided in two groups, included 30 hemodialyses (HD) and 35 without hemodialysis (non-HD) CKD patients, were compared to 25 healthy voluntaries matched by gender and age enrolled in the current study. Serum ERFE level was measured by an enzyme-linked immunosorbent assay (ELISA). Results: Serum ERFE level was significantly elevated in HD patients median (IQR) about 17.25 (13.4) ng/mL, odds ratio (OR = 10.161), (AUC 0.996) greater than CKD 4(6.1) ng/ml, (OR = 6.295), (AUC = 0.984) p 0.001; also, these are positively correlated with the use of ESA in HD, and CKD (r = 1.00 and r = 0.95) respectively as compared to healthy group 2(2.1) ng/ml. Serum ERFE levels were significantly negative (p 0.05) in both CKD and HD patients related to GFR (r = -0.396, and r = -0.68), transferrin saturation (TS%) (r = -0.842, and r = -0.877), serum levels of Ferritin (r = -0.865 and r = -0.866), and Iron (r = -0.860, and r = -0.851), RBC (r = -0.841, and r = -0.843), hemoglobin (Hb) (r = -0.758, and r = -0.796). Conclusion: The present study demonstrated that elevated serum ERFE levels associated with erythropoietic activity and anemia are higher in CKD with HD and non -HD patients treated with ESA than in non-ESA patients. This study suggested using ERFE as a successful tool for erythropoietic activity inspection in CKD, especially those taking ESAs to treat anemia.
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