Research advance on unexpected plasticity in the life cycle of Trypanosoma brucei

This analysis revealed that slender and stumpy form trypanosomes remain transcriptionally distinct throughout differentiation into the procyclic form. Furthermore, while the protein associated with differentiation 1 (PAD1) remains essential for the transition, slender cells do not require expression of other hallmark stumpy form traits, such as cell cycle arrest or the shortening of their flagella or microtubule corset.

Instead, slender trypanosomes are able to transition directly into procyclic forms. Taken together, these findings demonstrate that while slender cells of T. brucei follow distinct routes to become the procyclic form, they are capable of infecting both teneral and non-teneral tsetse flies, thereby contributing to the transmission and spread of these African parasites.