Table 1. In Vitro Activity of Beauvericin (1) on L. amazonensis, L. braziliensis, T. cruzi, L929 Fibroblasts, and Bone Marrow-Derived Macrophagesa.
| Parasite or host cell/Stage | EC50 or CC50 ± SD (μM)b | Selectivity index (SI) |
|---|---|---|
| L. amazonensis/promastigote | 1.2 ± 0.1 | 14.8 |
| L. amazonensis/intracellular amastigote | 0.8 ± 0.1 | 22.3 |
| L. braziliensis/promastigote | 0.9 ± 0.2 | 19.8 |
| L. braziliensis/intracellular amastigote | 0.6 ± 0.1 | 29.7 |
| Bone marrow-derived macrophages (BMDM) | 17.8 ± 0.4 | – |
| T. cruzi/epimastigote | 3.4 ± 0.8 | 13.4 |
| L929 fibroblasts | 45.5 ± 0.9 | – |
Cell viability, measured by the MTT assay, was determined after exposure to different concentrations of 1 for 24 h.
(EC50): 50% effective concentration. (CC50): 50% cytotoxicity concentration. (SD): standard deviation. (SI): BMDM CC50/Leishmania EC50 and L929 CC50/T. cruzi EC50. (−): not applicable.