In Vitro Susceptibility of Kinetoplastids to Celastroloids from Maytenus chiapensis
| Autor: | Jacob Lorenzo-Morales, Morena L. Martínez, Atteneri López-Arencibia, Marvin J. Núñez, Ignacio A. Jiménez, Carlos J. Bethencourt-Estrella, Isabel L. Bazzocchi, José E. Piñero, Desirée San Nicolás-Hernández |
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| Rok vydání: | 2021 |
| Předmět: |
Chagas disease
Pharmacology 01 natural sciences 03 medical and health sciences medicine Pharmacology (medical) Amastigote Trypanosoma cruzi 030304 developmental biology 0303 health sciences Miltefosine biology 010405 organic chemistry Chemistry Maytenus Leishmaniasis medicine.disease biology.organism_classification 0104 chemical sciences Infectious Diseases Mechanism of action Susceptibility Benznidazole medicine.symptom medicine.drug |
| Zdroj: | Antimicrob Agents Chemother |
| ISSN: | 1098-6596 0066-4804 |
| Popis: | Leishmaniasis and Chagas are among the most significant neglected tropical diseases. Due to several drawbacks with the current chemotherapy, developing new antikinetoplastid drugs has become an urgent issue. In the present work, a bioassay-guided investigation of the root bark of Maytenus chiapensis on Leishmania amazonensis and Trypanosoma cruzi led to the identification of two D:A-friedo-nor-oleanane triterpenoids (celastroloids), 20β-hydroxy-tingenone (celastroloid 5) and 3-O-methyl-6-oxo-tingenol (celastroloid 8), as promising antikinetoplastid leads. They displayed higher potency on L. amazonensis promastigotes (50% inhibitory concentrations [IC(50)s], 0.44 and 1.12 μM, respectively), intracellular amastigotes (IC(50)s, 0.83 and 1.91 μM, respectively), and T. cruzi epimastigote stage (IC(50)s, 2.61 and 3.41 μM, respectively) than reference drugs miltefosine and benznidazole. This potency was coupled with an excellent selectivity index on murine macrophages. Mechanism of action studies, including mitochondrial membrane potential (Δψm) and ATP-level analysis, revealed that celastroloids could induce apoptotic cell death in L. amazonensis triggered by the mitochondria. In addition, the structure-activity relationship is discussed. These findings strongly underline the potential of celastroloids as lead compounds to develop novel antikinetoplastid drugs. |
| Databáze: | OpenAIRE |
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