Antileishmanial activity and cytotoxicity of ent-beyerene diterpenoids

[Display omitted] We describe the in vitro activity of two natural isomeric ent-beyerene diterpenes, several derivatives and synthetic intermediates. Beyerenols 1 and 2 showed EC50 of 4.6 ± 9.4 and 5.3 ± 9.4 μg/mL against amastigotes of L. (V) brazilensis, with SI of 5.1 and 7.7, respectively. Beyer...

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Bibliographic Details
Published in:Bioorganic & medicinal chemistry 2019-01, Vol.27 (1), p.153-160
Main Authors: Murillo, Jilmar A., Gil, Juan F., Upegui, Yulieth A., Restrepo, Adriana M., Robledo, Sara M., Quiñones, Winston, Echeverri, Fernando, San Martin, Aurelio, Olivo, Horacio F., Escobar, Gustavo
Format: Article
Language:English
Subjects:
Antileishmanial
ent-Beyerene diterpenoids
Leishmania brazilensis
Semisynthesis
Steviol
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Summary:[Display omitted] We describe the in vitro activity of two natural isomeric ent-beyerene diterpenes, several derivatives and synthetic intermediates. Beyerenols 1 and 2 showed EC50 of 4.6 ± 9.4 and 5.3 ± 9.4 μg/mL against amastigotes of L. (V) brazilensis, with SI of 5.1 and 7.7, respectively. Beyerenol 1 was synthesized from stevioside. In vivo experiments with bereyenols showed cure in 50% of hamsters infected with L. (V) brazilensis topically applied as Cream I (beyerenol 1, 0.81%, w/w) and Cream III (beyerenol 2, 1.96%, w/w). These results suggest that beyerenols are potential candidates for cutaneous leishmaniasis chemotherapy by topical application. In vitro assays of amastigotes of L. (V) brazilensis showed EC50 of 1.1 ± 0.1 and 1.3 ± 0.04 μg/mL, with SI of 3.1 and 3.5 for hydrazone intermediates 10 and 11, respectively.
ISSN:0968-0896
1464-3391
DOI:10.1016/j.bmc.2018.11.030