Modelling motility of Trypanosoma brucei

Area of Science:

• Biophysics
• Parasitology
• Computational Biology

Background:

• African trypanosomiasis (sleeping sickness) is a severe disease caused by the protozoan parasite Trypanosoma brucei.
• The motility of T. brucei is essential for its survival and transmission, yet the mechanical principles governing its swimming are not fully understood.

Purpose of the Study:

• To investigate the mechanical factors influencing the swimming behavior of the bloodstream form of Trypanosoma brucei.
• To develop a realistic biophysical model for simulating trypanosome locomotion.

Main Methods:

• Development of a realistic trypanosome model featuring an elastic cell body and a flagellum composed of parallel filaments.
• Mesoscale hydrodynamic simulations to analyze the effects of body elasticity, flagellar actuation, and flagellar beating plane orientation.
• Validation of simulation results against experimental observations.

Main Results:

• Body elasticity significantly impacts trypanosome swimming dynamics.
• Non-uniform actuation along the flagellum and the flagellar beating plane's orientation are critical for efficient locomotion.
• The model accurately replicates observed trypanosome swimming patterns.

Conclusions:

• Parasite locomotion is highly sensitive to specific mechanical properties, including body elasticity and flagellar mechanics.
• These findings provide a framework for understanding parasite behavior in complex biological environments.
• Insights into T. brucei mechanics may inform future therapeutic strategies against African trypanosomiasis.