Related Experiment Videos
The trypanolytic factor of human serum.
Etienne Pays1, Benoit Vanhollebeke, Luc Vanhamme
1Laboratory of Molecular Parasitology, Institute of Molecular Biology and Medicine (IBMM), Université Libre de Bruxelles, 12 rue des Professeurs Jeener et Brachet, B-6041 Gosselies, Belgium. epays@ulb.ac.be
Nature Reviews. Microbiology
|May 20, 2006
Summary
Human blood effectively kills African trypanosomes, but some subspecies resist this. Apolipoprotein L1 in human blood is identified as the key factor responsible for this trypanolytic activity.
Area of Science:
- Parasitology
- Immunology
- Biochemistry
Background:
- African trypanosomes, like Trypanosoma brucei brucei, are mammalian parasites.
- Human blood exhibits potent trypanolytic activity against these parasites, unlike other mammals.
- Two subspecies, Trypanosoma brucei rhodesiense and Trypanosoma brucei gambiense, have evolved resistance, causing human sleeping sickness.
Purpose of the Study:
- To investigate the mechanism of Trypanosoma brucei rhodesiense resistance to human serum lysis.
- To identify the specific factor in human serum responsible for trypanolytic activity.
Main Methods:
- Investigated the resistance mechanism of Trypanosoma brucei rhodesiense.
- Identified apolipoprotein L1 as an ionic-pore-forming protein associated with high-density lipoprotein particles.
Main Results:
- Apolipoprotein L1 was identified as a key component involved in the interaction between human serum and trypanosomes.
- This protein forms ionic pores, contributing to the lysis of susceptible parasites.
Conclusions:
- Apolipoprotein L1 is proposed as the primary factor conferring trypanolytic activity to human serum.
- Understanding this mechanism is crucial for developing strategies against human-infecting trypanosomes.