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|Título: ||Altered erythrocyte membrane band 3 profile in chronic renal failure patients under haemodialysis|
|Autor: ||Costa, Elísio|
|Palavras-chave: ||Renal failure|
|Issue Date: ||2007|
|Editora: ||Sociedade Portuguesa de Hematologia|
|Citação: ||Costa, Elísio; Rocha, Susana; Rocha-Pereira, Petronila; Castro, Elisabeth; Reis, Flávio; Teixeira, Frederico; Miranda, Vasco; Sameiro-Faria, Maria; Loureiro, Alfredo; Quintanilha, Alexandre; Belo, Luís; Santos-Silva, Alice (2007) - Altered erythrocyte membrane band 3 profile in chronic renal failure patients under haemodialysis. In Vascular Wall and Endothelium. Lisboa: Sociedade Portuguesa de Hematologia. p. 73-77.|
|Resumo: ||Our aim was to study changes in RBC membrane band 3 profile, as a cumulative marker of RBC
changes, in chronic renal failure (CRF) patients under haemodialysis and recombinant human erythropoietin
(rhEPO) therapy and its linkage with resistance to this therapy.
We studied 63 CRF patients, 32 responders and 31 non -responders to rhEPO therapy, and 26 healthy
individuals matched for age and gender. We evaluated the band 3 profile and membrane -bound haemoglobin
(MBH). Total serum bilirrubin, glutathione peroxidase (GPx) and superoxide dismutase
activities, RBC count, haematocrit, haemoglobin concentration, haematimetric indices and reticulocyte
were also evaluated. CRF patients presented anaemia, slightly regenerative, as showed by the decreased
RBC count, Hb and haematocrit, alongside with an increased reticulocyte count, RPI and RDW values.
CRF patients showed a statistically significant decrease in high molecular weight aggregates and
proteolytic fragments (Pfrag), and a rise in Band 3 monomer. A rise in GPx and a trend to lower values
of MBH were also found in CRF patients. A positive correlation was found between Pfrag and, Hb
and haematocrit. When comparing the haematological data between the two groups of CRF patients, we found that non -responders patients were more anaemic, and presented a statistically significant
decrease in Pfrag, and a trend for a rise in MBH, suggesting a higher RBC damage.
Our data suggest that band 3 profile seems to be a good marker of erythrocyte changes in CRF patients.
These changes seem to be associated with a younger RBC population, but also with a rise in RBC damage,
which is enhanced in non -responders CRF patients. Band 3 profile could be used as a marker of RBC
changes in these patients and in the understanding of the mechanism of resistance to rhEPO therapy.|
|Appears in Collections:||DTDT - Artigos em Proceedings Não Indexados ao ISI/Scopus|
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