ArticleParasites & vectors2024
Ascorbate peroxidase modulation confirms key role in Leishmania infantum oxidative defence.
Article in Parasites & vectors, 2024. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 4 papers.
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Who cites it
4 citing papers in PubMed.
- Towards precision antileishmanial drug discovery: Integrating multi-omics, functional genomics, artificial intelligence and host-directed therapeutics.Molecular biology reports · 2026Review
- Essential role of glycogen synthase kinase 3 in regulating growth, drug response, and infectivity inAntimicrobial agents and chemotherapy · 2026Article
- The atypical dual-specificity protein phosphatase (DUSP)/kinatase of Leishmania infantum modulates infectivity, oxidative stress response and antimonial resistance.PLoS neglected tropical diseases · 2026Article
- Unraveling Leishmania major Metacyclogenesis: A Comprehensive Analysis of Transcriptomic and Metabolomic ProfilesIranian biomedical journal · 2025Article
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Authors and funding
6 authors.
Funding
Abstract
backgroundAscorbate peroxidase (APX) has emerged as a promising target for chemotherapy because of its absence in humans and crucial role in the antioxidant defence of trypanosomatids. APXs, which are class I haeme-containing enzymes, reduces hydrogen peroxide using ascorbate to produce water and monodehydroascorbate, thereby preventing cell damage caused by H
methodsWe aimed to create an APX-knockout L. infantum line using CRISPR/Cas9. Despite unsuccessful attempts at full knockouts, we achieved deletion of chromosomal copies post-APX episomal insertion, yielding LiΔchrAPX::LbAPX parasites. We performed phenotypic characterization to assess the impact of these genetic modifications, which included the determination of APX transcript expression levels using quantitative PCR, drug sensitivity, infectivity, and parasite survival in macrophages.
resultsQuantitative polymerase chain reaction (PCR) analysis revealed a 10- to 13-fold reduction in APX transcript expression in LiΔchrAPX::LbAPX compared with wild-type (LiWT) and APX-overexpressing (Li::Cas9::LbAPX) parasites, respectively. The episomes in those knockdown parasites remained stable even after 20 drug-free passages in vitro. Li::Cas9::LbAPX parasites showed increased resistance to trivalent antimony (Sb
conclusionsOur findings hint at the indispensability of APX in L. infantum and raise the possibility of its potential as a therapeutic target for leishmaniasis.
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