نتایج جستجو برای: leishmania promastigotes cultivation
تعداد نتایج: 46670 فیلتر نتایج به سال:
Leishmania promastigote cells transmitted by the insect vector get phagocytosed by macrophages and convert into the amastigote form. During development and transformation, the parasites are exposed to various concentrations of reactive oxygen species, which can induce programmed cell death (PCD). We show that a mitochondrial peroxiredoxin (LdmPrx) protects Leishmania donovani from PCD. Whereas ...
Leishmania donovani is the etiologic agent of fatal visceral leishmaniasis in man. During their life cycle, Leishmania exist as flagellated promastigotes within the sandfly vector and as nonflagellated amastigotes in the macrophage phagolysosomal compartment of the mammalian host. The transformation from promastigotes to amastigotes is a critical step for the establishment of infection, and the...
The growth and survival of intracellular parasites depends on the availability of extracellular nutrients. Deprivation of nutrients viz glucose or amino acid alters redox balance in mammalian cells as well as some lower organisms. To further understand the relationship, the mechanistic role of L-arginine in regulation of redox mediated survival of Leishmania donovani promastigotes was investiga...
Introduction & Objective: Leishmania is a protozoan of the trypanosomatidae family. This protozoan has two stages in its life cycle, promastigote form in sand flies and amastigote form in macrophage of mammalian hosts. The purpose of this study was identification and comparison of proteins of Leishmania amastigote and promastigote stages. Materials & Methods: The present study is a cross se...
Macroautophagy in Leishmania, which is important for the cellular remodeling required during differentiation, relies upon the hydrolytic activity of two ATG4 cysteine peptidases (ATG4.1 and ATG4.2). We have investigated the individual contributions of each ATG4 to Leishmania major by generating individual gene deletion mutants (Δatg4.1 and Δatg4.2); double mutants could not be generated, indica...
conclusions allium hirtifolium and z. spina-christi extracts showed the most efficient activity in the inhibition of promastigote growth, but this was not total. the remaining plant extracts indicated ineffective or very weak efficiency on the leishmania promastigotes. there is a possibility of achieving better results by changing the extraction method; determining materials affecting promastig...
In a previous work we demonstrated that diarylheptanoids extracted from Centrolobium sclerophyllum are very active against Leishmania amazonensis promastigotes. In order to continue our studies with these class of compounds, we decided to evaluate the activity of several diarylheptanoids derived from curcumin (diferuloyl methane) against the extracellular form (promastigotes) of L. amazonensis....
Surfactant protein A (SP-A) is a hydrophilic pulmonary protein belonging to the collectin family, involved in lung homeostasis, the regulation of host defenses and inflammation. The present study addresses the activity of SP-A against promastigotes and amastigotes of Leishmania amazonensis and its cytotoxicity for host cells. SP-A exhibited similar activity against both parasite forms, with an ...
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