Ação de citocinas na hematopoiese em pacientes com doenças falciformes / Cytokines action on hematopoiesis in sickle cell disease patients

AUTOR(ES)
DATA DE PUBLICAÇÃO

2006

RESUMO

Sickle cell disease (SCD) has been recognized as a chronic inflammatory condition. Cytokines are released in response to stress or pathological situations and have influence on hematopoiesis. The aim of this study was to evaluate Interleukin-3 (IL-3), Interferon-? (IFN-?) and neopterin (NP) levels in steady state patients with sickle cell anemia (SS) (n= 38) and SC hemoglobinopathy (n= 17), in order to verify the possible action of those cytokines and NP on iron metabolism and hematopoiesis. Serum IL-3 concentration was higher in SS and SC groups than in controls, whereas IFN-? determinations were not different among groups. SS patients presenting HbF? 8.5% showed IL-3 levels significantly higher than those with HbF<8.5% (p= 0.0167). No correlation was observed among inflammatory and iron metabolism parameters. It was observed a significant correlation between IL-3 and Hb levels (r= 0.4201, p= 0.0086) and a negative correlation between IL-3 and reticulocyte counting (r= - 0.4019, p= 0.0124) only in SS group. NP levels were significantly higher in SS group than in control (p<0.0001), but not different between SSxSC and SCxControl. No correlation was observed between NP and iron metabolism parameters. In conclusion, it was confirmed that IL-3 stimulates hematopoiesis and that SS patients, even in steady-state, presenting macrophage/monocyte activation, represented by high levels of NP, that probably contributes to chronic inflammatory condition

ASSUNTO(S)

anemia de anemia falciforme neopterina interferon gama interleucina 3 fanconi

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