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• W2795565185 abstract "The development of HIV aspartyl peptidase inhibitors (HIV-PIs) and their introduction into AIDS therapy preceded a significant decrease in the incidence, morbidity and mortality of relevant protozoan co-infections. However, few data are available about how HIV-PIs act on pathogenic parasites, such as Trypanosoma cruzi, the etiological agent of Chagas disease. Therefore, the aim of the present work was to evaluate different physiological aspects of the treatment of the infective trypomastigote forms of T. cruzi with the HIV-PIs, nelfinavir and lopinavir. At the LD50/4 h doses, both HIV-PIs significantly reduced the trypomastigote size and markedly increased the granularity/complexity. Transmission electron microscopy analysis associated to biochemical assays permitted definition of the main HIV-PIs targets in the parasite. Lopinavir and nelfinavir induced (i) plasma membrane shedding, particularly in the flagellar region, which drastically affected parasite integrity; (ii) strong mitochondrial swelling with rare matrix fragmentation, which were linked to severely reduced hydrolytic activity of dehydrogenases and organelle membrane depolarization; (iii) increased generation of reactive oxygen species (ROS); (iv) dilation of both nuclear envelope (without DNA disruption) and endoplasmic reticulum (with formation of autophagosomes), and (v) accumulation of intracellular lipid droplets, revealing a typical lipid metabolism disorder. Collectively, our study demonstrated that nelfinavir and lopinavir target vital cellular structures of trypomastigotes, culminating in irreversible metabolic injuries that lead to T. cruzi death." @default.
• W2795565185 created "2018-04-13" @default.
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• W2795565185 date "2018-08-01" @default.
• W2795565185 modified "2023-10-16" @default.
• W2795565185 title "Primary evidence of the mechanisms of action of HIV aspartyl peptidase inhibitors on Trypanosoma cruzi trypomastigote forms" @default.
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• W2795565185 doi "https://doi.org/10.1016/j.ijantimicag.2018.03.021" @default.
• W2795565185 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/29635008" @default.
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