The Potential Role of Sanguinarine As an Inhibitor of Leishmania PP2C in the Induction of Apoptosis

Overview

Journal Acta Parasitol

Date 2025 Jan 24

PMID 39853571

Authors

M Ornelas-Cruces

A R Escalona-Montano

N Salaiza-Suazo

S Sifontes-Rodriguez

M M Aguirre-Garcia

Affiliations

Soon will be listed here.

Abstract

Leishmania spp. cause a wide range of human diseases, localized skin lesions, mucocutaneous and visceral infections. In the present study, the aim was to investigate the potential role of sanguinarine as a specific inhibitor of Leishmania PP2C that can induce apoptosis in the parasite. The results demonstrated that sanguinarine inhibits, in a dose-dependent mode at 72 h, the growth and phosphatase activity of both Leishmania major and Leishmania mexicana promastigotes. Therefore, all assays were performed from this time period onwards. TUNEL assay was used to identify apoptosis and indicated apoptosis in L. major and L. mexicana promastigotes. Similarly, Western blot assay showed that PARP, a DNA damage indicator molecule, was present in L. major and L. mexicana promastigotes incubated with the inhibitor. In addition, differential expression of the proapoptotic protein Bax and the antiapoptotic protein Bcl-2 was observed in both Leishmania species. Finally, the protein phosphatase PP2C expression was not affected, whereas p38 MAPK phosphorylation was increased in L. major promastigotes than in L. mexicana promastigotes. Therefore, sanguinarine proved to be an inhibitor of the growth and PP2C enzymatic activity of L. major and L. mexicana promastigotes, and with it, this inhibition induced apoptosis.

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