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Updated: Jun 6, 2026
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Purification of Extracellular Trypanosomes, Including African, from Blood by Anion-Exchangers (Diethylaminoethyl-cellulose Columns)
Published on: April 6, 2019
Modulation of innate immunity by African trypanosomes
Donna M Paulnock1, Bailey E Freeman, John M Mansfield
1Department of Bacteriology, University of Wisconsin-Madison, Madison, Wisconsin 53706, USA.
Parasitology
|November 20, 2010
Summary
Host immune responses to Trypanosoma brucei are dictated by early interactions with parasite factors. Once initiated, these responses are irreversible, leading to uncontrolled parasite growth and host death.
Area of Science:
- Immunology
- Parasitology
- Molecular Biology
Background:
- Trypanosoma brucei infections present a complex interplay between host immunity and parasite evasion strategies.
- Understanding the early immune events is crucial for developing effective treatments against African trypanosomiasis.
Purpose of the Study:
- To investigate how host and parasite factors, particularly interferon-gamma (IFN-γ) and glycosylphosphatidylinositol (GPI) from Trypanosoma brucei, influence immune cell activation.
- To determine the critical timing of immune responses following parasite exposure and its impact on infection outcome.
Main Methods:
- Experimental studies involving Brucei group trypanosomes.
- Analysis of host and parasite factor interactions.
- Assessment of macrophage (MP) and dendritic cell (DC) activation profiles.
- Evaluation of innate immune cell function changes over time during infection.
Main Results:
- The balance of host (IFN-γ) and parasite (GPI-sVSG) factors, along with exposure timing, determines MP and DC activation.
- Early exposure to parasite GPI substituents triggers irreversible changes in innate immune cell function.
- Despite available immune mechanisms, hosts cannot control trypanosome proliferation, leading to virulent infection and host death.
Conclusions:
- Trypanosomes strategically manipulate host immune responses for their survival and transmission.
- Early immune events following parasite exposure are critical and largely irreversible.
- Parasite-driven immune modulation benefits trypanosome survival and host detriment.
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