Artículo
Tamoxifen acts on Trypanosoma cruzi sphingolipid pathway triggering an apoptotic death process
Landoni, Malena
; Piñero, Tamara Alejandra
; Soprano, Luciana Lía
; Garcia Bournissen, Facundo
; Fichera, Laura Edith
; Esteva, Mónica Inés; Duschak, Vilma Gladys
; Couto, Alicia Susana
Fecha de publicación:
27/08/2019
Editorial:
Academic Press Inc Elsevier Science
Revista:
Biochemical and Biophysical Research Communications
ISSN:
0006-291X
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
This study shows the effects of tamoxifen, a known estrogen receptor antagonist used in the treatment of breast cancer, on the sphingolipid pathway of Trypanosoma cruzi, searching for potential chemotherapeutic targets. A dose-dependent epimastigote growth inhibition at increasing concentration of tamoxifen was determined. In blood trypomastigotes, treatment with 10 μM showed 90% lysis, while 86% inhibition of intracellular amastigote development was obtained using 50 μM. Lipid extracts from treated and non-treated metabolically labelled epimastigotes evidenced by thin layer chromatography different levels of sphingolipids and MALDI-TOF mass spectrometry analysis assured the identity of the labelled species. Comparison by HPLC-ESI mass spectrometry of lipids, notably exhibited a dramatic increase in the level of ceramide in tamoxifen-treated parasites and a restrained increase of ceramide-1P and sphingosine, indicating that the drug is acting on the enzymes involved in the final breakdown of ceramide. The ultrastructural analysis of treated parasites revealed characteristic morphology of cells undergoing an apoptotic-like death process. Flow cytometry confirmed cell death by an apoptotic-like machinery indicating that tamoxifen triggers this process by acting on the parasitic sphingolipid pathway.
Palabras clave:
APOPTOTIC-LIKE PROCESS
,
LIPIDOMICS
,
SPHINGOLIPIDS
,
TAMOXIFEN
,
TRYPANOSOMA CRUZI
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Identificadores
Colecciones
Articulos(IMIPP)
Articulos de INSTITUTO MULTIDISCIPLINARIO DE INVESTIGACIONES EN PATOLOGIAS PEDIATRICAS
Articulos de INSTITUTO MULTIDISCIPLINARIO DE INVESTIGACIONES EN PATOLOGIAS PEDIATRICAS
Citación
Landoni, Malena; Piñero, Tamara Alejandra; Soprano, Luciana Lía; Garcia Bournissen, Facundo; Fichera, Laura Edith; et al.; Tamoxifen acts on Trypanosoma cruzi sphingolipid pathway triggering an apoptotic death process; Academic Press Inc Elsevier Science; Biochemical and Biophysical Research Communications; 516; 3; 27-8-2019; 934-940
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