Data/hora: 05/06/2024 02:35:01

Provedor de dados: 	80	
País: 	Brazil	
Título: 	Effect of phospholipase A2 inhibitors during infection caused by Leishmania (Leishmania) amazonensis	
Autores: 	Bordon,Maria L. A. C.; Laurenti,Márcia D.; Ribeiro,Susan Pereira; Toyama,Marcos H.; Toyama,Daniela de O.; Passero,Luiz Felipe D.	
Data: 	2018-01-01	
Ano: 	2018	
Palavras-chave: 	Leishmania (Leishmania) amazonensis; Macrophages; BALB/c mice; Phospholipase A2; Phospholipase A2inhibitors.	
Resumo: 	Abstract  Background: Lipid metabolites play an important role in parasite differentiation and virulence. Studies have revealed that Leishmania sp. uses prostaglandins to evade innate barriers, thus enabling the parasites to survive inside immune cells. Despite the role of the enzyme Phospholipase A2 (PLA2) in prostaglandins production, few studies have investigated the role of parasite PLA2 during the interaction between L. (L.) amazonensis and the host (in vitro and in vivo) immune cells.  Methods: In the present work, the leishmanicidal effect of PLA2 inhibitors, methyl arachidonyl fluorophosphonate (MAFP), bromoenol lactone (BEL) and aristolochic acid (AA) were investigated in vitro (promastigote and intracellular amastigote forms of L. (L.) amazonensis) and during in vivo infection using BALB/c mice.  Results: The aforementioned inhibitors were deleterious to promastigote and amastigote forms of the L. (L.) amazonensis and were non-toxic to peritoneal macrophages from BALB/c mice. L. (L.) amazonensis-infected BALB/c mice treated with the inhibitor BEL presented decreased lesion size and skin parasitism; however, BEL treatment induced hepatotoxicity in BALB/c mice.  Conclusions: Results presented herein suggested that PLA2 inhibitors altered L. (L.) amazonensis viability. In spite of liver toxicity, treatment with BEL was the most selective compound in vitro, as well in vivo, resulting in lower skin parasitism in the infected mice. These findings corroborate the role of PLA2 in parasite virulence and maintenance in vertebrate hosts, and suggest that molecules structurally related to BEL should be considered when planning compounds against Leishmania sp.	
Tipo: 	Info:eu-repo/semantics/article	
Idioma: 	Inglês	
Identificador: 	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1678-91992018000100312	
Editor: 	Centro de Estudos de Venenos e Animais Peçonhentos	
Relação: 	10.1186/s40409-018-0156-9	
Formato: 	text/html	
Fonte: 	Journal of Venomous Animals and Toxins including Tropical Diseases  v.24 2018	
Fonte: 	info:eu-repo/semantics/openAccess