Novel cationic gold(I) compounds with 5-nitrofuryl containing thiosemicarbazone ligands exhibit activity against Trypanosoma cruzi

Dublin Core

Title

Novel cationic gold(I) compounds with 5-nitrofuryl containing thiosemicarbazone ligands exhibit activity against Trypanosoma cruzi

Subject

TRYPANOSOMA CRUZI
TIOSEMICARBAZONAS
COMPUESTOS DE ORO
RADICALES LIBRES
MITOCONDRIA
ADN
BIBLIOGRAFIA NACIONAL QUIMICA
2026

Abstract

Searching for more effective chemotherapeutic agents for the treatment of American Trypanosomiasis, a disease caused by the parasite Trypanosoma cruzi (T. cruzi), the development of gold(I) compounds represents a promising strategy. In this work, four new cationic gold(I) compounds, [Au(HL)₂]Cl, where HL = 5-nitrofuryl-containing thiosemicarbazones, were synthesized and characterized in the solid state and in DMSO solution. Their cationic and radical structures were experimentally and theoretically studied. The formation of intermolecular aurophilic interactions and the lipophilicity of the complexes were also analyzed. Three gold(I) compounds displayed micromolar IC₅₀ values (around 10 μM) against T. cruzi bloodstream trypomastigotes and showed moderate selectivity towards the parasites with respect to human cells of endothelial morphology. Two of these complexes were more active than their respective thiosemicarbazone ligands and exhibited antiparasitic activity comparable to that of Nifurtimox. Lipophilicity and the presence of aurophilic interactions appear to play a key role in their antitrypanosomal activity. The active gold(I) compounds induced cytosolic reactive oxygen species (ROS) generation, disrupted mitochondrial membrane potential, and promoted mitochondrial ROS production, suggesting they may act as crucial precursors to mitochondria-mediated apoptotic cell death. In addition, DNA competitive binding with ethidium bromide, evaluated by fluorescence measurements, demonstrated that the compounds interact with this biomolecule. Overall, these three active gold(I) complexes can be considered promising hits for the development of prospective agents against T. cruzi.

Creator

Albornoz, Carla
Ortega-Campos, José
Barriga-Gonzalez, Germán
Maya, Juan Diego
Otero, Lucía
Fuentealba, Pablo
Olea-Azar, Claudio
Rodríguez-Arce, Esteban

Source

Journal of Inorganic Biochemistry, v. 275, 2026.-- e113131

Publisher

Elsevier

Date

2026

Rights

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Format

PDF

Extent

15 p.

Language

Inglés

Type

Artículo

Identifier

10.1016/j.jinorgbio.2025.113131DOI

Document Item Type Metadata

Original Format

PDF
Date Added
September 23, 2026
Collection
Bibliografía Nacional Química
Item Type
Document
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Citation
Albornoz, Carla et al., “Novel cationic gold(I) compounds with 5-nitrofuryl containing thiosemicarbazone ligands exhibit activity against Trypanosoma cruzi,” RIQUIM - Repositorio Institucional de la Facultad de Química - UdelaR, accessed October 7, 2026, https://riquim.fq.edu.uy/items/show/7120.