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- W2605114433 abstract "Hydrogen peroxide is an important antimicrobial agent but is also crucially involved in redox signaling and pathogen-host cell interactions. As a basis for systematically investigating intracellular H2O2 dynamics and regulation in living malaria parasites, we established the genetically encoded fluorescent H2O2 sensors roGFP2-Orp1 and HyPer-3 in Plasmodium falciparum. Both ratiometric redox probes as well as the pH control SypHer were expressed in the cytosol of blood-stage parasites. Both redox sensors showed reproducible sensitivity towards H2O2 in the lower micromolar range in vitro and in the parasites. Due to the pH sensitivity of HyPer-3, we used parasites expressing roGFP2-Orp1 for evaluation of short-, medium-, and long-term effects of antimalarial drugs on H2O2 levels and detoxification in Plasmodium. None of the quinolines or artemisinins tested had detectable direct effects on the H2O2 homeostasis at pharmacologically relevant concentrations. However, pre-treatment of the cells with antimalarial drugs or heat shock led to a higher tolerance towards exogenous H2O2. The systematic evaluation and comparison of the two genetically encoded cytosolic H2O2 probes in malaria parasites provides a basis for studying parasite-host cell interactions or drug effects with spatio-temporal resolution while preserving cell integrity." @default.
- W2605114433 created "2017-04-14" @default.
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- W2605114433 date "2017-04-03" @default.
- W2605114433 modified "2023-10-14" @default.
- W2605114433 title "H2O2 dynamics in the malaria parasite Plasmodium falciparum" @default.
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- W2605114433 doi "https://doi.org/10.1371/journal.pone.0174837" @default.
- W2605114433 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/5378400" @default.
- W2605114433 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/28369083" @default.
- W2605114433 hasPublicationYear "2017" @default.
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