Use este identificador para citar ou linkar para este item: http://sgc.anlis.gob.ar/handle/123456789/1338
Título: Tamoxifen acts on Trypanosoma cruzi sphingolipid pathway triggering an apoptotic death process
Autor(es): Landoni, Malena 
Piñero, Tamara 
Soprano, Luciana L 
Garcia-Bournissen, Facundo 
Fichera, Laura E. 
Esteva, Monica I 
Duschak, Vilma G 
Couto, Alicia S 
Palavras-chave: Lipidómica;Esfingolípidos;Trypanosoma cruzi;Tamoxifeno
Data do documento: 27-Ago-2019
Editora: Academic Press
Jornal: Biochemical and biophysical research communications 
Resumo: 
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.
Descrição: 
Fil: Landoni, Malena. Universidad de Buenos Aires, FCEN, Departamento de Química Orgánica - CONICET; Argentina.

Fil: Piñero, Tamara. Universidad de Buenos Aires, FCEN, Departamento de Química Orgánica - CONICET; Argentina.

Fil: Soprano, Luciana L. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología; Argentina.

Fil: Garcia-Bournissen, Facundo. Instituto Multidisciplinario de Investigaciones en Enfermedades Pedíatricas (IMIPP), CONICET, Hospital de Niños "Ricardo Gutiérrez"; Argentina.

Fil: Fichera, Laura E. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología; Argentina.

Fil: Esteva, Monica I. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología; Argentina.

Fil: Duschak, Vilma G. ANLIS Dr.C.G.Malbrán. Instituto Nacional de Parasitología; Argentina.

Fil: Couto, Alicia S. Universidad de Buenos Aires, FCEN, Departamento de Química Orgánica - CONICET; Argentina.
URI: http://sgc.anlis.gob.ar/handle/123456789/1338
ISSN: 0006-291X
DOI: 10.1016/j.bbrc.2019.06.149
Direitos: Closed Access
Aparece nas Coleções:Publicaciones INP

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