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Updated: Apr 2, 2026
Sexual Transmission of American Trypanosomes from Males and Females to Naive Mates
Published on: January 27, 2019
Trypanosoma cruzi parasites fight for control of the JAK-STAT pathway by disarming their host
Philipp Stahl1, Ralph T Schwarz2, Françoise Debierre-Grockiego3
1Institute of Virology; Parasitology Unit; University of Marburg ; Marburg, Germany.
Abstract:
The zoonotic Chagas' disease is caused by infections with the hemoflagellate Trypanosoma cruzi (T. cruzi) which is endemic in Latin America. Despite recent advances in our understanding of the pathogenesis of the disease, the underlying molecular processes involved in host-parasite interactions are only poorly understood. In particular, the mechanisms for parasite persistence in host cells remain largely unknown. Cytokine-driven transcription factors from the family of STAT (signal transducer and activator of transcription) proteins appear to play a central role in the fight against T. cruzi infection. However, amastigotes proliferating in the cytoplasm of infected host cells develop effective strategies to circumvent the attack executed by STAT proteins. This review highlights the interactions between T. cruzi parasites and human host cells in terms of cytokine signaling and, in particular, discusses the impact of STATs on the balance between parasite invasion and clearance.
Insights
Chagas
Area of Science:
- Immunology
- Molecular Biology
- Parasitology
Background:
- Chagas' disease, caused by Trypanosoma cruzi, is a significant zoonotic infection in Latin America.
- Molecular mechanisms of host-parasite interactions in Chagas' disease remain poorly understood, particularly parasite persistence strategies.
- Signal transducer and activator of transcription (STAT) proteins are crucial in combating T. cruzi infection.
Purpose of the Study:
- To review the interactions between T. cruzi and human host cells.
- To highlight the role of cytokine signaling and STAT proteins in Chagas' disease.
- To discuss how T. cruzi amastigotes evade STAT-mediated host defenses.
Main Methods:
- Literature review focusing on host-parasite interactions in Chagas' disease.
- Analysis of cytokine signaling pathways involving STAT proteins.
- Examination of T. cruzi strategies for intracellular persistence.
Main Results:
- T. cruzi amastigotes employ mechanisms to evade STAT-mediated immune responses.
- STAT proteins play a critical role in the host's ability to control T. cruzi infection.
- Understanding these interactions is key to developing new therapeutic strategies.
Conclusions:
- STAT proteins are central to the host-parasite balance in Chagas' disease.
- T. cruzi effectively circumvents host defenses, including STAT-mediated attacks.
- Further research into these molecular interactions is essential for disease management.
