Flow cytometric assessment of oxidant stress in age-fractionated thalassaemic trait erythrocytes and its relationship to in vitro growth of Plasmodium falciparum.
Parasitology
; 116 ( Pt 1): 1-6, 1998 Jan.
Article
em En
| MEDLINE
| ID: mdl-9481768
ABSTRACT
The role of oxidant stress in mediating the protection against malaria in thalassaemic red blood cells (RBC) has been hypothesized. In this study we have assessed the relationship between oxidant stress, red cell age and malarial parasite activity in thalassaemic RBC. Using a flow cytometric method to assess lipid peroxidation, we have shown that the age-related increase in sensitivity to oxidative stress previously demonstrated in normal RBC also occurs in thalassaemic RBC. Invasion and growth of Plasmodium falciparum was also shown to deteriorate with increasing RBC age. This effect was more pronounced in thalassaemic RBC with associated schizont maturation arrest and abnormal parasite morphology. In addition, there was a slight but consistent inverse correlation between sensitivity to oxidant stress and parasite activity (R = -0.43; P = 0.03 for normal RBC and R = -0.42; P = 0.01 for thalassaemic RBC). Our findings indicate an association between red cell age, oxidant stress and P. falciparum growth, providing further support for the role of oxidant stress in mediating the protective effect against malaria in thalassaemic RBC.
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Base de dados:
MEDLINE
Assunto principal:
Plasmodium falciparum
/
Talassemia beta
/
Talassemia alfa
/
Estresse Oxidativo
/
Eritrócitos
Limite:
Animals
/
Humans
Idioma:
En
Ano de publicação:
1998
Tipo de documento:
Article