Recombinant human erythropoietin-induced erythropoiesis regulates hepcidin expression over iron status in the rat.
Blood Cells Mol Dis
; 59: 63-70, 2016 07.
Article
en En
| MEDLINE
| ID: mdl-27282570
ABSTRACT
The crosstalk between several factors controlling hepcidin synthesis is poorly clarified for different physiological and pathological conditions. Our aim was to study the impact of increasing recombinant human erythropoietin (rHuEPO) doses on erythropoiesis, iron metabolism and hepcidin, using a rat model. Male Wistar rats were divided in 5 groups control (vehicle) and rHuEPO-treated groups (100, 200, 400 and 600IU/kgbody weight/week), 3 times per week, during 3weeks. Hematological and iron data were evaluated. The expression of several genes involved in iron metabolism was analyzed by qPCR. Liver hepcidin protein was evaluated by Western Blot. The rHuEPO treatment induced erythropoiesis and increased transferrin saturation (TSAT) in a dose dependent manner. Tf receptor 2 (TfR2), hemojuvelin (HJV) and bone morphogenetic protein 6 (BMP6) were up-regulated in rHuEPO200 group. Matriptase-2 was down-regulated in rHuEPO200 group, and up-regulated in the other rHuEPO-treated groups. Hepcidin synthesis was increased in rHuEPO200 group, and repressed in the rHuEPO400 and rHuEPO600 groups. Our study showed that when a high erythropoietic stimulus occurs, hepcidin synthesis is mainly regulated by TSAT; however, when the erythropoiesis rate reaches a specific threshold, extramedullary hematopoiesis is triggered, and the control of hepcidin synthesis is switched to matriptase-2, thus inhibiting hepcidin synthesis.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Banco de datos:
MEDLINE
Asunto principal:
Eritropoyetina
/
Eritropoyesis
/
Hepcidinas
/
Hierro
Tipo de estudio:
Prognostic_studies
Límite:
Animals
/
Humans
/
Male
Idioma:
En
Revista:
Blood Cells Mol Dis
Asunto de la revista:
HEMATOLOGIA
Año:
2016
Tipo del documento:
Article
País de afiliación:
Portugal