Susceptibilities of Ugandan Plasmodium falciparum Isolates to Proteasome Inhibitors

The proteasome is a promising target for antimalarial chemotherapy. We assessed susceptibilities of fresh Plasmodium falciparum isolates from eastern Uganda to seven proteasome inhibitors: two asparagine ethylenediamines, two macrocyclic peptides, and three peptide boronates; five had median IC valu...

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Veröffentlicht in:Antimicrobial agents and chemotherapy 2022-10, Vol.66 (10), p.e0081722-e0081722
Hauptverfasser: Garg, Shreeya, Kreutzfeld, Oriana, Chelebieva, Sevil, Tumwebaze, Patrick K, Byaruhanga, Oswald, Okitwi, Martin, Orena, Stephen, Katairo, Thomas, Nsobya, Samuel L, Conrad, Melissa D, Aydemir, Ozkan, Legac, Jennifer, Gould, Alexandra E, Bayles, Brett R, Bailey, Jeffrey A, Duffey, Maelle, Lin, Gang, Kirkman, Laura A, Cooper, Roland A, Rosenthal, Philip J
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container_end_page e0081722
container_issue 10
container_start_page e0081722
container_title Antimicrobial agents and chemotherapy
container_volume 66
creator Garg, Shreeya
Kreutzfeld, Oriana
Chelebieva, Sevil
Tumwebaze, Patrick K
Byaruhanga, Oswald
Okitwi, Martin
Orena, Stephen
Katairo, Thomas
Nsobya, Samuel L
Conrad, Melissa D
Aydemir, Ozkan
Legac, Jennifer
Gould, Alexandra E
Bayles, Brett R
Bailey, Jeffrey A
Duffey, Maelle
Lin, Gang
Kirkman, Laura A
Cooper, Roland A
Rosenthal, Philip J
description The proteasome is a promising target for antimalarial chemotherapy. We assessed susceptibilities of fresh Plasmodium falciparum isolates from eastern Uganda to seven proteasome inhibitors: two asparagine ethylenediamines, two macrocyclic peptides, and three peptide boronates; five had median IC values
doi_str_mv 10.1128/aac.00817-22
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We assessed susceptibilities of fresh Plasmodium falciparum isolates from eastern Uganda to seven proteasome inhibitors: two asparagine ethylenediamines, two macrocyclic peptides, and three peptide boronates; five had median IC values &lt;100 nM. TDI8304, a macrocylic peptide lead compound with drug-like properties, had a median IC of 16 nM. Sequencing genes encoding the β2 and β5 catalytic proteasome subunits, the predicted targets of the inhibitors, and five additional proteasome subunits, identified two mutations in β2 (I204T, S214F), three mutations in β5 (V2I, A142S, D150E), and three mutations in other subunits. The β2 S214F mutation was associated with decreased susceptibility to two peptide boronates, with IC s of 181 nM and 2635 nM against mutant versus 62 nM and 477 nM against wild type parasites for MMV1579506 and MMV1794229, respectively, although significance could not be formally assessed due to the small number of mutant parasites with available data. 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We assessed susceptibilities of fresh Plasmodium falciparum isolates from eastern Uganda to seven proteasome inhibitors: two asparagine ethylenediamines, two macrocyclic peptides, and three peptide boronates; five had median IC values &lt;100 nM. TDI8304, a macrocylic peptide lead compound with drug-like properties, had a median IC of 16 nM. Sequencing genes encoding the β2 and β5 catalytic proteasome subunits, the predicted targets of the inhibitors, and five additional proteasome subunits, identified two mutations in β2 (I204T, S214F), three mutations in β5 (V2I, A142S, D150E), and three mutations in other subunits. The β2 S214F mutation was associated with decreased susceptibility to two peptide boronates, with IC s of 181 nM and 2635 nM against mutant versus 62 nM and 477 nM against wild type parasites for MMV1579506 and MMV1794229, respectively, although significance could not be formally assessed due to the small number of mutant parasites with available data. The other β2 and β5 mutations and mutations in other subunits were not associated with susceptibility to tested compounds. Against culture-adapted Ugandan isolates, two asparagine ethylenediamines and the peptide proteasome inhibitors WLW-vinyl sulfone and WLL-vinyl sulfone (which were not studied ) demonstrated low nM activity, without decreased activity against β2 S214F mutant parasites. 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source MEDLINE; Elektronische Zeitschriftenbibliothek - Frei zugängliche E-Journals; PubMed Central
subjects Antimalarials - chemistry
Antimalarials - pharmacology
Antimicrobial Chemotherapy
Asparagine
Drug Resistance - genetics
Ethylenediamines - pharmacology
Humans
Malaria, Falciparum - drug therapy
Malaria, Falciparum - parasitology
Mechanisms of Resistance
Peptides - pharmacology
Plasmodium falciparum - drug effects
Plasmodium falciparum - genetics
Proteasome Endopeptidase Complex - genetics
Proteasome Inhibitors - chemistry
Proteasome Inhibitors - pharmacology
Uganda
title Susceptibilities of Ugandan Plasmodium falciparum Isolates to Proteasome Inhibitors
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