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Memórias do Instituto Oswaldo Cruz
Fundação Oswaldo Cruz, Fiocruz
ISSN: 1678-8060
EISSN: 1678-8060
Vol. 108, No. 6, 2013, pp. 686-690
Bioline Code: oc13116
Full paper language: English
Document type: Research Article
Document available free of charge

Memórias do Instituto Oswaldo Cruz, Vol. 108, No. 6, 2013, pp. 686-690

 en Apoptosis of non-parasitised red blood cells in Plasmodium yoelii check for this species in other resources malaria
Totino, Paulo Renato Rivas; Pinna, Raquel Alves; De-Oliveira, Ana Cecilia Amado Xavier; Banic, Dalma Maria; Daniel-Ribeiro, Cláudio Tadeu & Ferreira-da-Cruz, Maria de Fátima

Abstract

Recently, while studying erythrocytic apoptosis during Plasmodium yoelii check for this species in other resources infection, we observed an increase in the levels of non-parasitised red blood cell (nRBC) apoptosis, which could be related to malarial anaemia. Therefore, in the present study, we attempted to investigate whether nRBC apoptosis is associated with the peripheral RBC count, parasite load or immune response. To this end, BALB/c mice were infected with P. yoelii 17XL and nRBC apoptosis, number of peripheral RBCs, parasitaemia and plasmatic levels of cytokines, nitric oxide and anti-RBC antibodies were evaluated at the early and late stages of anaemia. The apoptosis of nRBCs increased at the late stage and was associated with parasitaemia, but not with the intensity of the immune response. The increased percentage of nRBC apoptosis that was observed when anaemia was accentuated was not related to a reduction in peripheral RBCs. We conclude that nRBC apoptosis in P. yoelii malaria appears to be induced in response to a high parasite load. Further studies on malaria models in which acute anaemia develops during low parasitaemia are needed to identify the potential pathogenic role of nRBC apoptosis.

Keywords
malaria; anaemia; red blood cells; apoptosis

 
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