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Eryptosis of non-parasitized erythrocytes is related to anemia in Plasmodium berghei low parasitema malaria of Wistar rats.

Authors :
Totino PRR
de Souza HADS
Correa EHC
Daniel-Ribeiro CT
Ferreira-da-Cruz MF
Source :
Parasitology research [Parasitol Res] 2019 Jan; Vol. 118 (1), pp. 377-382. Date of Electronic Publication: 2018 Dec 01.
Publication Year :
2019

Abstract

It is known that premature elimination of non-parasitized RBCs (nRBCs) plays an important role in the pathogenesis of malarial anemia, in which suicidal death process (eryptosis) of nRBCs has been suggested to be involved. To check this possibility, we investigate eryptosis during infection of P. berghei ANKA in Wistar rats, a malaria experimental model that, similar to human malaria, the infection courses with low parasitemia and acute anemia. As expected, P. berghei ANKA infection was marked by low parasite burdens that reached a mean peak of 3% between days six and nine post-infection and solved spontaneously. A significant reduction of the hemoglobin levels (~ 30%) was also observed on days subsequent to the peak of parasitemia, persisting until day 16 post-infection. In eryptosis assays, it was observed a significant increase in the levels of PS-exposing nRBC, which coincided with the reduction of hemoglobin levels and was positively related to anemia. In addition to PS externalization, eryptosis of nRBC induced by P. berghei infection was characterized by cytoplasm calcium influx, but not caspases activity. These results confirm our previous studies evidencing a pro-eryptotic effect of malaria infection on nRBCs and show that a caspase-independent eryptotic process is implicated in anemia induced by P. berghei ANKA infection in Wistar rats.

Details

Language :
English
ISSN :
1432-1955
Volume :
118
Issue :
1
Database :
MEDLINE
Journal :
Parasitology research
Publication Type :
Academic Journal
Accession number :
30506514
Full Text :
https://doi.org/10.1007/s00436-018-6167-1