ArticlePLoS neglected tropical diseases2026
Synthesis and preliminary evaluation of novel compounds that demonstrate broad host-directed anti-leishmanial activity.
Article in PLoS neglected tropical diseases, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
Leishmaniasis, a neglected tropical disease affecting nearly 10% of the global population, suffers from limited therapeutic options and rising drug resistance. To address this, we developed 343 analogs of AR-12, a compound that has previously illustrated host-directed anti-leishmanial effects. Primary screening using a luminescence-based assay revealed 66 analogs with greater selectivity than the parent compound, AR-12. Sixteen promising candidates, selected for high potency (IC₅₀ < 1 µM) or high selectivity (>15), underwent secondary screening via Giemsa staining. Four lead compounds (53, 134, 197, and 354) demonstrated therapeutic indices greater than 40. Tertiary assays confirmed their broad in vitro efficacy against both Leishmania donovani and Leishmania mexicana. Notably, 197 exhibited potent host-directed and proteomic analysis identified lysozyme as a mechanistic target, implicating it in the host-mediated clearance of intracellular parasites. These findings highlight the dual host- and pathogen-directed mechanisms of these compounds and support their potential as the basis for new therapeutic strategies. Further optimization and clinical exploration of these leads are warranted to meet the urgent need for effective leishmaniasis treatments.
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