Physalis angulata induces death of promastigotes and amastigotes of Leishmania (Leishmania) amazonensis via the generation of reactive oxygen species.
Leishmaniasis are a neglected group of emerging diseases that have been found in 98 countries and are caused by protozoa of the genus Leishmania. The therapy for leishmaniasis causes several side effects and leads to drug-resistant strains. Natural products from plants have exhibited activities against Leishmania in various experimental models. Physalis angulata is a widely used plant in popular medicine, and in the literature it has well-documented leishmanicidal activity. However, its mechanism of action is still unknown. Thus, this study aims to evaluate the mechanism driving the leishmanicidal activity of an aqueous extract of P. angulata root (AEPa). AEPa was effective against both promastigotes and intracellular amastigote forms of Leishmania amazonensis. This effect was mediated by an increase of reactive oxygen species (ROS), but not of nitric oxide (NO). The increased production of ROS induces cell death by phenotypes seems by apoptosis cell death in Leishmania, but not autophagy or necrosis. In addition, morphological analysis of macrophages showed that AEPa induced a high number of cytoplasmic projections, increased the volume of cytoplasm and number of vacuoles, caused cytoskeleton alterations and resulted in high spreading ability. AEPa also promoted superoxide anion (O2(-)) production in both uninfected macrophages and those infected with Leishmania. Therefore, these results revealed that AEPa causes cell death by phenotypes seems by apoptosis cell death in L. amazonensis and modulates macrophage activation through morphofunctional alterations and O2(-) generation to induce Leishmania death.
['Da Silva|B J M|BJM|', 'Da Silva|R R P|RRP|', 'Rodrigues|A P D|APD|', 'Farias|L H S|LHS|', 'Do Nascimento|J L M|JLM|', 'Silva|E O|EO|']
D000818:Animals D017209:Apoptosis D001343:Autophagy D007891:Leishmania D008018:Life Cycle Stages D008262:Macrophage Activation D017737:Macrophages, Peritoneal D051379:Mice D009336:Necrosis D032321:Physalis D008517:Phytotherapy D010936:Plant Extracts D018517:Plant Roots D017382:Reactive Oxygen Species
Physalis angulata Macrophage activation Antileishmanial activity L. (L.) amazonensis ROS production