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Knockout of the peroxiredoxin 5 homologue PFAOP does not affect the artemisinin susceptibility of Plasmodium falciparum

Artemisinins are the current mainstay of malaria chemotherapy. Their exact mode of action is an ongoing matter of debate, and several factors have recently been reported to affect an early stage of artemisinin resistance of the most important human malaria parasite Plasmodium falciparum. Here, we id...

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Bibliographic Details
Main Authors: Djuika, Carine F. (Author) , Staudacher, Verena (Author) , Sanchez, Cecilia P. (Author) , Lanzer, Michael (Author) , Deponte, Marcel (Author)
Format: Article (Journal)
Language:English
Published: 30 June 2017
In: Scientific reports
Year: 2017, Volume: 7
ISSN:2045-2322
DOI:10.1038/s41598-017-04277-5
Online Access:Verlag, kostenfrei, Volltext: http://dx.doi.org/10.1038/s41598-017-04277-5
Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s41598-017-04277-5
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Author Notes:Carine F. Djuika, Verena Staudacher, Cecilia P. Sanchez, Michael Lanzer & Marcel Deponte
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Summary:Artemisinins are the current mainstay of malaria chemotherapy. Their exact mode of action is an ongoing matter of debate, and several factors have recently been reported to affect an early stage of artemisinin resistance of the most important human malaria parasite Plasmodium falciparum. Here, we identified a locus on chromosome 7 that affects the artemisinin susceptibility of P. falciparum in a quantitative trait locus analysis of a genetic cross between strains 7G8 and GB4. This locus includes the peroxiredoxin gene PFAOP. However, steady-state kinetic data with recombinant PfAOP do not support a direct interaction between this peroxidase and the endoperoxide artemisinin. Furthermore, neither the overexpression nor the deletion of the encoding gene affected the IC50 values for artemisinin or the oxidants diamide and tert-butyl hydroperoxide. Thus, PfAOP is dispensable for blood stage parasite survival, and the correlation between the artemisinin susceptibility and chromosome 7 is probably based on another gene within the identified locus.
Item Description:Gesehen am 22.08.2017
Physical Description:Online Resource
ISSN:2045-2322
DOI:10.1038/s41598-017-04277-5

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