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In vitro leishmanicidal activity of two cholesterol derivatives

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Abstract

We evaluated the leishmanicidal activity of commercially available 5α-cholest-7-en-3β-ol [5α-chol], (+)-4-cholesten-3-one [(+)-4-chol] and the equimolar mixture of the two of them in promastigotes and amastigotes of two different strains of Leishmania mexicana (LCL) and (DCL). The leishmanicidal effectiveness of these sterols was determined by promastigote growth-kinetic experiments and promastigote viability using the propidium iodide staining procedure. The proliferation test was performed using the CFSE (5-Carboxyfluorescein N-succinimidyl ester) staining of parasites at different time points. To determine the leishmanicidal effectiveness of these sterols in amastigotes, we evaluated parasite killing inside of macrophages at different time points. The trypan blue exclusion test was used to determine cytotoxicity of sterols in uninfected macrophages. We included in all experiments a control group of parasites treated with 2% DMSO (Dimethyl Sulfoxide) and another one treated with the reference drug sodium stibogluconate (Sb). Our results showed that the equimolar mixture at 2000 times lower concentration presented similar leishmanicidal activity as Sb. This mixture was similarly effective at 100 times lower concentration than individual sterols tested separately indicating the existence of a synergistic effect against LCL and DCL parasites. The therapeutic index of the equimolar mixture was 10,000—16,000 times higher than the one recorded by Sb and was not cytotoxic to macrophages. Therefore, the equimolar mixture of 5α-Chol and (+)-4-chol may represent a potential alternative for the treatment of cutaneous leishmaniasis.

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The data that support the findings of this study are available from the corresponding author upon reasonable request.

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Acknowledgements

This study was financially supported by Universidad Autónoma de Campeche (003/UAC/2016). Authors appreciate Mr Rene Gonzales and Eleazar Velasco´s assistance. We are also in debt to Prof Norma Galindo and Prof Patricia Talamás who provided DCL parasites and J774A.1 cells, respectively.

Funding

This research was supported by Universidad Autónoma de Campeche (003/UAC/2016).

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APIM: designed, performed experiments, and wrote manuscript. CMLD: designed, performed experiments, and revised manuscript.

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Correspondence to Angélica Patricia Isaac-Márquez or Claudio Manuel Lezama-Dávila.

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Isaac-Márquez, A.P., Lezama-Dávila, C.M. In vitro leishmanicidal activity of two cholesterol derivatives. World J Microbiol Biotechnol 38, 66 (2022). https://doi.org/10.1007/s11274-022-03248-x

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  • DOI: https://doi.org/10.1007/s11274-022-03248-x

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