Trypanosome Purification
Trypanosome Purification - Related Videos
14:26
Purification of Extracellular Trypanosomes, Including African, from Blood by Anion-Exchangers (Diethylaminoethyl-cellulose Columns)
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Cited by 3 •
2019
This method of trypanosome separation from blood depends on their surface charge being less negative than mammalian blood cells. Infected blood is placed and treated on an anion-exchanger column. This method, the most fitting diagnostic for African trypanosomiasis, provides purified parasites for immunological, biological, biochemical, pharmaceutical and molecular biology investigations.
08:16
Plasmid Purification
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2023
Plasmid purification is a technique used to isolate and purify plasmid DNA from genomic DNA, proteins, ribosomes, and the bacterial cell wall. A plasmid is a small, circular, double-stranded DNA that is used as a carrier of specific DNA molecules. When introduced into a host organism via transformation, a plasmid will be replicated, creating numerous copies of the DNA fragment under study. In this video, a step-by-step generalized procedure is described for how to perform plasmid purification.
09:19
RNA Catalyst as a Reporter for Screening Drugs against RNA Editing in Trypanosomes
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Cited by 1 •
2014
A highly sensitive ribozyme-based assay, applicable to high-throughput screening of chemicals targeting the unique process of RNA editing in trypanosomatid pathogens, is described in this paper. Inhibitors can be used as tools for hypothesis-driven analysis of the RNA editing process and ultimately as therapeutics.
06:30
Gel Purification
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2023
Gel purification is used to recover DNA fragments after electrophoretic separation. DNA recovery from an agarose gel includes three basic steps: binding, washing and eluting from a silica column. DNA is believed to bind to silica in the presence of high salt via a salt bridge. Following binding, DNA is washed of impurities and eluted under low salt conditions disrupting this interaction. This video goes through a step-by-step, generalized procedure for cutting out a band from the gel, gel...
11:22
GST-His purification: A Two-step Affinity Purification Protocol Yielding Full-length Purified Proteins
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Cited by 18 •
2013
In the present protocol, we demonstrate a highly efficient and cost-effective small-scale protein purification method, which allows purification of recombinant proteins by uniquely combining a cleavable GST-tag and a small His-tag.
FAQs
The separation depends on differences in surface charge and selective binding under controlled ionic conditions. Negatively charged blood cells and other debris bind to the DEAE-cellulose matrix, whereas trypanosomes pass through the material and can be collected. This contrast reduces host-derived material in the parasite preparation, making subsequent analyses more consistent and easier to interpret.
Ionic conditions control how strongly sample components interact with DEAE-cellulose. When conditions are appropriately controlled, host cells and debris remain associated with the matrix while trypanosomes pass through. If this selectivity is not maintained, the collected material may contain more host contamination, reducing the clarity of microscopy, molecular assays, antigen studies, or immune-response measurements.
Removing host-cell contamination helps researchers attribute observed signals more confidently to the parasite rather than to blood cells or sample debris. This is especially important when examining parasite antigens, host-pathogen interactions, or immune responses. Cleaner preparations improve sample consistency and support clearer interpretation of how trypanosomes evade or manipulate vertebrate immunity.
A typical workflow applies infected blood or another biological sample to DEAE-cellulose under controlled ionic conditions, allows selective retention of negatively charged blood cells and debris, and collects the trypanosomes that pass through. The recovered parasites can then be directed to microscopy, molecular assays, antigen characterization, infection experiments, or treatment evaluation.
Purified parasites are useful when experiments require more consistent parasite material and less interference from host blood components. Researchers can use them in infection experiments to study host-pathogen interactions, examine immune responses, and evaluate antiparasitic treatments. The reduced contamination helps connect experimental findings more directly with trypanosome biology and infection-related outcomes.
In immunology and infection research, purified trypanosomes provide material for examining antigen characteristics and vertebrate immune responses. They also support studies of parasite immune evasion or manipulation, because host-cell contamination is reduced before analysis. This cleaner starting material can strengthen microscopy, molecular measurements, and comparisons among infection or treatment conditions.