Leishmania Promastigotes
Leishmania Promastigotes - Related Videos
04:46
Assessment of Leishmania Virulence within Cultured Macrophages
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2025
This video investigates Leishmania's virulence by treating macrophages with metacyclic promastigotes, resulting in the formation of intracellular amastigotes. The confirmation of Leishmania's virulence is achieved through nucleic acid fluorescent dye staining. This insight can contribute to the development of new therapies for leishmaniasis.
09:53
In vivo Imaging of Transgenic Leishmania Parasites in a Live Host
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Cited by 65 •
2010
An in vivo imaging system is used to generate quantitative measurements of murine infection with the Trypanosomatid protozoan Leishmania. This is a non-invasive and non-lethal method for detecting parasites expressing luciferase within many tissues throughout the course of chronic Leishmania spp. infection.
08:41
Investigating the Phagocytosis of Leishmania using Confocal Microscopy
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Cited by 3 •
2021
The mechanism associated with phagocytosis in Leishmania infection remains poorly understood. Here, we describe methods to evaluate the early events occurring during Leishmania interaction with the host cells.
10:03
Development of Leishmania Species Strains with Constitutive Expression of eGFP
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2023
Here, we describe the methodology used for generating L. panamensis and L. donovani strains expressing the gene for eGFP as a stable integrated transgene using the pLEXSY system. Transfected parasites were cloned by limiting dilution, and clones with the highest fluorescence intensity in both species were selected for further use in drug screening assays.
14:32
Polysome Profiling in Leishmania, Human Cells and Mouse Testis
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Cited by 21 •
2018
The overall goal of polysome profiling technique is analysis of translational activity of individual mRNAs or transcriptome mRNAs during protein synthesis. The method is important for studies of protein synthesis regulation, translation activation and repression in health and multiple human diseases.
FAQs
The key transition occurs after metacyclic promastigotes enter mammalian skin and are taken up by macrophages. Inside these host cells, the parasites encounter acidic phagolysosomes and transform into amastigotes, the form associated with intracellular replication. This developmental shift links vector transmission to establishment of infection and provides a central model for studying parasite adaptation.
Surface molecules help determine how Leishmania promastigotes interact with host immune cells during transmission and uptake. Examining these molecules can reveal how parasites contact macrophages, enter host cells, and contribute to immune evasion. Their study is therefore relevant to explaining why promastigote biology affects both early infection and subsequent disease development.
The acidic phagolysosome provides the intracellular setting in which taken-up promastigotes transform into amastigotes. This compartment is important because the parasite must persist and replicate there while avoiding immune clearance. Studying this stage-specific interaction connects the physical environment inside macrophages with parasite differentiation and the progression of infection.
Promastigotes and amastigotes represent different developmental forms associated with different host environments. Promastigotes develop in sand flies and initiate mammalian infection, whereas amastigotes arise after uptake by macrophages and replicate within acidic phagolysosomes. Comparing these forms helps investigators relate transmission-stage biology to intracellular survival and disease development.
Promastigote cultures provide experimental material for examining parasite biology and the interactions between Leishmania and host immune cells. They also support studies of differentiation, surface molecules, antiparasitic drug activity, and vaccine candidates. These applications make cultured parasites useful for connecting cellular mechanisms with questions about transmission, infection, and possible intervention strategies.
Cultured promastigotes allow investigators to study antiparasitic drug activity in a controlled experimental system. Such work can be related to parasite biology and developmental behavior, while also informing broader investigations of Leishmania infection. The cultures therefore serve as a research platform for evaluating drug effects alongside studies of host-pathogen interactions and vaccine candidates.
They connect the events of parasite transmission with the mammalian immune response. Researchers can examine how promastigotes interact with macrophages, undergo intracellular transformation, and persist despite mechanisms that might otherwise clear infection. This framework helps explain host-pathogen interactions and provides context for studying disease development, immune evasion, and candidate vaccines.